| version 1.11, 1999/11/21 21:58:31 |
version 1.463, 2023/02/28 08:45:24 |
|
|
| |
/* $OpenBSD$ */ |
| /* |
/* |
| |
* Author: Tatu Ylonen <ylo@cs.hut.fi> |
| |
* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| |
* All rights reserved |
| |
* Identity and host key generation and maintenance. |
| |
* |
| |
* As far as I am concerned, the code I have written for this software |
| |
* can be used freely for any purpose. Any derived versions of this |
| |
* software must be clearly marked as such, and if the derived work is |
| |
* incompatible with the protocol description in the RFC file, it must be |
| |
* called by a name other than "ssh" or "Secure Shell". |
| |
*/ |
| |
|
| ssh-keygen.c |
#include <sys/types.h> |
| |
#include <sys/socket.h> |
| |
#include <sys/stat.h> |
| |
|
| Author: Tatu Ylonen <ylo@cs.hut.fi> |
#ifdef WITH_OPENSSL |
| |
#include <openssl/evp.h> |
| |
#include <openssl/pem.h> |
| |
#endif |
| |
|
| Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
#include <stdint.h> |
| All rights reserved |
#include <errno.h> |
| |
#include <fcntl.h> |
| |
#include <netdb.h> |
| |
#include <pwd.h> |
| |
#include <stdarg.h> |
| |
#include <stdio.h> |
| |
#include <stdlib.h> |
| |
#include <string.h> |
| |
#include <unistd.h> |
| |
#include <limits.h> |
| |
#include <locale.h> |
| |
|
| Created: Mon Mar 27 02:26:40 1995 ylo |
#include "xmalloc.h" |
| |
#include "sshkey.h" |
| |
#include "authfile.h" |
| |
#include "sshbuf.h" |
| |
#include "pathnames.h" |
| |
#include "log.h" |
| |
#include "misc.h" |
| |
#include "match.h" |
| |
#include "hostfile.h" |
| |
#include "dns.h" |
| |
#include "ssh.h" |
| |
#include "ssh2.h" |
| |
#include "ssherr.h" |
| |
#include "atomicio.h" |
| |
#include "krl.h" |
| |
#include "digest.h" |
| |
#include "utf8.h" |
| |
#include "authfd.h" |
| |
#include "sshsig.h" |
| |
#include "ssh-sk.h" |
| |
#include "sk-api.h" /* XXX for SSH_SK_USER_PRESENCE_REQD; remove */ |
| |
#include "cipher.h" |
| |
|
| Identity and host key generation and maintenance. |
#ifdef ENABLE_PKCS11 |
| |
#include "ssh-pkcs11.h" |
| |
#endif |
| |
|
| */ |
#ifdef WITH_OPENSSL |
| |
# define DEFAULT_KEY_TYPE_NAME "rsa" |
| |
#else |
| |
# define DEFAULT_KEY_TYPE_NAME "ed25519" |
| |
#endif |
| |
|
| #include "includes.h" |
/* |
| RCSID("$Id$"); |
* Default number of bits in the RSA, DSA and ECDSA keys. These value can be |
| |
* overridden on the command line. |
| |
* |
| |
* These values, with the exception of DSA, provide security equivalent to at |
| |
* least 128 bits of security according to NIST Special Publication 800-57: |
| |
* Recommendation for Key Management Part 1 rev 4 section 5.6.1. |
| |
* For DSA it (and FIPS-186-4 section 4.2) specifies that the only size for |
| |
* which a 160bit hash is acceptable is 1kbit, and since ssh-dss specifies only |
| |
* SHA1 we limit the DSA key size 1k bits. |
| |
*/ |
| |
#define DEFAULT_BITS 3072 |
| |
#define DEFAULT_BITS_DSA 1024 |
| |
#define DEFAULT_BITS_ECDSA 256 |
| |
|
| #include "rsa.h" |
static int quiet = 0; |
| #include "ssh.h" |
|
| #include "xmalloc.h" |
|
| #include "fingerprint.h" |
|
| |
|
| /* Generated private key. */ |
/* Flag indicating that we just want to see the key fingerprint */ |
| RSA *private_key; |
static int print_fingerprint = 0; |
| |
static int print_bubblebabble = 0; |
| |
|
| /* Generated public key. */ |
/* Hash algorithm to use for fingerprints. */ |
| RSA *public_key; |
static int fingerprint_hash = SSH_FP_HASH_DEFAULT; |
| |
|
| /* Number of bits in the RSA key. This value can be changed on the command |
/* The identity file name, given on the command line or entered by the user. */ |
| line. */ |
static char identity_file[PATH_MAX]; |
| int bits = 1024; |
static int have_identity = 0; |
| |
|
| /* Flag indicating that we just want to change the passphrase. This can be |
/* This is set to the passphrase if given on the command line. */ |
| set on the command line. */ |
static char *identity_passphrase = NULL; |
| int change_passphrase = 0; |
|
| |
|
| /* Flag indicating that we just want to change the comment. This can be set |
/* This is set to the new passphrase if given on the command line. */ |
| on the command line. */ |
static char *identity_new_passphrase = NULL; |
| int change_comment = 0; |
|
| |
|
| int quiet = 0; |
/* Key type when certifying */ |
| |
static u_int cert_key_type = SSH2_CERT_TYPE_USER; |
| |
|
| /* Flag indicating that we just want to see the key fingerprint */ |
/* "key ID" of signed key */ |
| int print_fingerprint = 0; |
static char *cert_key_id = NULL; |
| |
|
| /* The identity file name, given on the command line or entered by the user. */ |
/* Comma-separated list of principal names for certifying keys */ |
| char identity_file[1024]; |
static char *cert_principals = NULL; |
| int have_identity = 0; |
|
| |
|
| /* This is set to the passphrase if given on the command line. */ |
/* Validity period for certificates */ |
| char *identity_passphrase = NULL; |
static u_int64_t cert_valid_from = 0; |
| |
static u_int64_t cert_valid_to = ~0ULL; |
| |
|
| /* This is set to the new passphrase if given on the command line. */ |
/* Certificate options */ |
| char *identity_new_passphrase = NULL; |
#define CERTOPT_X_FWD (1) |
| |
#define CERTOPT_AGENT_FWD (1<<1) |
| |
#define CERTOPT_PORT_FWD (1<<2) |
| |
#define CERTOPT_PTY (1<<3) |
| |
#define CERTOPT_USER_RC (1<<4) |
| |
#define CERTOPT_NO_REQUIRE_USER_PRESENCE (1<<5) |
| |
#define CERTOPT_REQUIRE_VERIFY (1<<6) |
| |
#define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \ |
| |
CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC) |
| |
static u_int32_t certflags_flags = CERTOPT_DEFAULT; |
| |
static char *certflags_command = NULL; |
| |
static char *certflags_src_addr = NULL; |
| |
|
| /* This is set to the new comment if given on the command line. */ |
/* Arbitrary extensions specified by user */ |
| char *identity_comment = NULL; |
struct cert_ext { |
| |
char *key; |
| |
char *val; |
| |
int crit; |
| |
}; |
| |
static struct cert_ext *cert_ext; |
| |
static size_t ncert_ext; |
| |
|
| |
/* Conversion to/from various formats */ |
| |
enum { |
| |
FMT_RFC4716, |
| |
FMT_PKCS8, |
| |
FMT_PEM |
| |
} convert_format = FMT_RFC4716; |
| |
|
| |
static char *key_type_name = NULL; |
| |
|
| |
/* Load key from this PKCS#11 provider */ |
| |
static char *pkcs11provider = NULL; |
| |
|
| |
/* FIDO/U2F provider to use */ |
| |
static char *sk_provider = NULL; |
| |
|
| |
/* Format for writing private keys */ |
| |
static int private_key_format = SSHKEY_PRIVATE_OPENSSH; |
| |
|
| |
/* Cipher for new-format private keys */ |
| |
static char *openssh_format_cipher = NULL; |
| |
|
| |
/* Number of KDF rounds to derive new format keys. */ |
| |
static int rounds = 0; |
| |
|
| /* argv0 */ |
/* argv0 */ |
| extern char *__progname; |
extern char *__progname; |
| |
|
| void |
static char hostname[NI_MAXHOST]; |
| |
|
| |
#ifdef WITH_OPENSSL |
| |
/* moduli.c */ |
| |
int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
| |
int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long, |
| |
unsigned long); |
| |
#endif |
| |
|
| |
static void |
| |
type_bits_valid(int type, const char *name, u_int32_t *bitsp) |
| |
{ |
| |
if (type == KEY_UNSPEC) |
| |
fatal("unknown key type %s", key_type_name); |
| |
if (*bitsp == 0) { |
| |
#ifdef WITH_OPENSSL |
| |
int nid; |
| |
|
| |
switch(type) { |
| |
case KEY_DSA: |
| |
*bitsp = DEFAULT_BITS_DSA; |
| |
break; |
| |
case KEY_ECDSA: |
| |
if (name != NULL && |
| |
(nid = sshkey_ecdsa_nid_from_name(name)) > 0) |
| |
*bitsp = sshkey_curve_nid_to_bits(nid); |
| |
if (*bitsp == 0) |
| |
*bitsp = DEFAULT_BITS_ECDSA; |
| |
break; |
| |
case KEY_RSA: |
| |
*bitsp = DEFAULT_BITS; |
| |
break; |
| |
} |
| |
#endif |
| |
} |
| |
#ifdef WITH_OPENSSL |
| |
switch (type) { |
| |
case KEY_DSA: |
| |
if (*bitsp != 1024) |
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fatal("Invalid DSA key length: must be 1024 bits"); |
| |
break; |
| |
case KEY_RSA: |
| |
if (*bitsp < SSH_RSA_MINIMUM_MODULUS_SIZE) |
| |
fatal("Invalid RSA key length: minimum is %d bits", |
| |
SSH_RSA_MINIMUM_MODULUS_SIZE); |
| |
else if (*bitsp > OPENSSL_RSA_MAX_MODULUS_BITS) |
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fatal("Invalid RSA key length: maximum is %d bits", |
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OPENSSL_RSA_MAX_MODULUS_BITS); |
| |
break; |
| |
case KEY_ECDSA: |
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if (sshkey_ecdsa_bits_to_nid(*bitsp) == -1) |
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fatal("Invalid ECDSA key length: valid lengths are " |
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"256, 384 or 521 bits"); |
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} |
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#endif |
| |
} |
| |
|
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/* |
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* Checks whether a file exists and, if so, asks the user whether they wish |
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* to overwrite it. |
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* Returns nonzero if the file does not already exist or if the user agrees to |
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* overwrite, or zero otherwise. |
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*/ |
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static int |
| |
confirm_overwrite(const char *filename) |
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{ |
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char yesno[3]; |
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struct stat st; |
| |
|
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if (stat(filename, &st) != 0) |
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return 1; |
| |
printf("%s already exists.\n", filename); |
| |
printf("Overwrite (y/n)? "); |
| |
fflush(stdout); |
| |
if (fgets(yesno, sizeof(yesno), stdin) == NULL) |
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return 0; |
| |
if (yesno[0] != 'y' && yesno[0] != 'Y') |
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return 0; |
| |
return 1; |
| |
} |
| |
|
| |
static void |
| ask_filename(struct passwd *pw, const char *prompt) |
ask_filename(struct passwd *pw, const char *prompt) |
| { |
{ |
| char buf[1024]; |
char buf[1024]; |
| snprintf(identity_file, sizeof(identity_file), "%s/%s", |
char *name = NULL; |
| pw->pw_dir, SSH_CLIENT_IDENTITY); |
|
| printf("%s (%s): ", prompt, identity_file); |
if (key_type_name == NULL) |
| fflush(stdout); |
name = _PATH_SSH_CLIENT_ID_RSA; |
| if (fgets(buf, sizeof(buf), stdin) == NULL) |
else { |
| exit(1); |
switch (sshkey_type_from_name(key_type_name)) { |
| if (strchr(buf, '\n')) |
case KEY_DSA_CERT: |
| *strchr(buf, '\n') = 0; |
case KEY_DSA: |
| if (strcmp(buf, "") != 0) |
name = _PATH_SSH_CLIENT_ID_DSA; |
| strlcpy(identity_file, buf, sizeof(identity_file)); |
break; |
| have_identity = 1; |
case KEY_ECDSA_CERT: |
| |
case KEY_ECDSA: |
| |
name = _PATH_SSH_CLIENT_ID_ECDSA; |
| |
break; |
| |
case KEY_ECDSA_SK_CERT: |
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case KEY_ECDSA_SK: |
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name = _PATH_SSH_CLIENT_ID_ECDSA_SK; |
| |
break; |
| |
case KEY_RSA_CERT: |
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case KEY_RSA: |
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name = _PATH_SSH_CLIENT_ID_RSA; |
| |
break; |
| |
case KEY_ED25519: |
| |
case KEY_ED25519_CERT: |
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name = _PATH_SSH_CLIENT_ID_ED25519; |
| |
break; |
| |
case KEY_ED25519_SK: |
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case KEY_ED25519_SK_CERT: |
| |
name = _PATH_SSH_CLIENT_ID_ED25519_SK; |
| |
break; |
| |
case KEY_XMSS: |
| |
case KEY_XMSS_CERT: |
| |
name = _PATH_SSH_CLIENT_ID_XMSS; |
| |
break; |
| |
default: |
| |
fatal("bad key type"); |
| |
} |
| |
} |
| |
snprintf(identity_file, sizeof(identity_file), |
| |
"%s/%s", pw->pw_dir, name); |
| |
printf("%s (%s): ", prompt, identity_file); |
| |
fflush(stdout); |
| |
if (fgets(buf, sizeof(buf), stdin) == NULL) |
| |
exit(1); |
| |
buf[strcspn(buf, "\n")] = '\0'; |
| |
if (strcmp(buf, "") != 0) |
| |
strlcpy(identity_file, buf, sizeof(identity_file)); |
| |
have_identity = 1; |
| } |
} |
| |
|
| void |
static struct sshkey * |
| |
load_identity(const char *filename, char **commentp) |
| |
{ |
| |
char *pass; |
| |
struct sshkey *prv; |
| |
int r; |
| |
|
| |
if (commentp != NULL) |
| |
*commentp = NULL; |
| |
if ((r = sshkey_load_private(filename, "", &prv, commentp)) == 0) |
| |
return prv; |
| |
if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) |
| |
fatal_r(r, "Load key \"%s\"", filename); |
| |
if (identity_passphrase) |
| |
pass = xstrdup(identity_passphrase); |
| |
else |
| |
pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN); |
| |
r = sshkey_load_private(filename, pass, &prv, commentp); |
| |
freezero(pass, strlen(pass)); |
| |
if (r != 0) |
| |
fatal_r(r, "Load key \"%s\"", filename); |
| |
return prv; |
| |
} |
| |
|
| |
#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
| |
#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
| |
#define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
| |
#define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
| |
|
| |
#ifdef WITH_OPENSSL |
| |
static void |
| |
do_convert_to_ssh2(struct passwd *pw, struct sshkey *k) |
| |
{ |
| |
struct sshbuf *b; |
| |
char comment[61], *b64; |
| |
int r; |
| |
|
| |
if ((b = sshbuf_new()) == NULL) |
| |
fatal_f("sshbuf_new failed"); |
| |
if ((r = sshkey_putb(k, b)) != 0) |
| |
fatal_fr(r, "put key"); |
| |
if ((b64 = sshbuf_dtob64_string(b, 1)) == NULL) |
| |
fatal_f("sshbuf_dtob64_string failed"); |
| |
|
| |
/* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */ |
| |
snprintf(comment, sizeof(comment), |
| |
"%u-bit %s, converted by %s@%s from OpenSSH", |
| |
sshkey_size(k), sshkey_type(k), |
| |
pw->pw_name, hostname); |
| |
|
| |
sshkey_free(k); |
| |
sshbuf_free(b); |
| |
|
| |
fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
| |
fprintf(stdout, "Comment: \"%s\"\n%s", comment, b64); |
| |
fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
| |
free(b64); |
| |
exit(0); |
| |
} |
| |
|
| |
static void |
| |
do_convert_to_pkcs8(struct sshkey *k) |
| |
{ |
| |
switch (sshkey_type_plain(k->type)) { |
| |
case KEY_RSA: |
| |
if (!PEM_write_RSA_PUBKEY(stdout, k->rsa)) |
| |
fatal("PEM_write_RSA_PUBKEY failed"); |
| |
break; |
| |
case KEY_DSA: |
| |
if (!PEM_write_DSA_PUBKEY(stdout, k->dsa)) |
| |
fatal("PEM_write_DSA_PUBKEY failed"); |
| |
break; |
| |
case KEY_ECDSA: |
| |
if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa)) |
| |
fatal("PEM_write_EC_PUBKEY failed"); |
| |
break; |
| |
default: |
| |
fatal_f("unsupported key type %s", sshkey_type(k)); |
| |
} |
| |
exit(0); |
| |
} |
| |
|
| |
static void |
| |
do_convert_to_pem(struct sshkey *k) |
| |
{ |
| |
switch (sshkey_type_plain(k->type)) { |
| |
case KEY_RSA: |
| |
if (!PEM_write_RSAPublicKey(stdout, k->rsa)) |
| |
fatal("PEM_write_RSAPublicKey failed"); |
| |
break; |
| |
case KEY_DSA: |
| |
if (!PEM_write_DSA_PUBKEY(stdout, k->dsa)) |
| |
fatal("PEM_write_DSA_PUBKEY failed"); |
| |
break; |
| |
case KEY_ECDSA: |
| |
if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa)) |
| |
fatal("PEM_write_EC_PUBKEY failed"); |
| |
break; |
| |
default: |
| |
fatal_f("unsupported key type %s", sshkey_type(k)); |
| |
} |
| |
exit(0); |
| |
} |
| |
|
| |
static void |
| |
do_convert_to(struct passwd *pw) |
| |
{ |
| |
struct sshkey *k; |
| |
struct stat st; |
| |
int r; |
| |
|
| |
if (!have_identity) |
| |
ask_filename(pw, "Enter file in which the key is"); |
| |
if (stat(identity_file, &st) == -1) |
| |
fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| |
if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0) |
| |
k = load_identity(identity_file, NULL); |
| |
switch (convert_format) { |
| |
case FMT_RFC4716: |
| |
do_convert_to_ssh2(pw, k); |
| |
break; |
| |
case FMT_PKCS8: |
| |
do_convert_to_pkcs8(k); |
| |
break; |
| |
case FMT_PEM: |
| |
do_convert_to_pem(k); |
| |
break; |
| |
default: |
| |
fatal_f("unknown key format %d", convert_format); |
| |
} |
| |
exit(0); |
| |
} |
| |
|
| |
/* |
| |
* This is almost exactly the bignum1 encoding, but with 32 bit for length |
| |
* instead of 16. |
| |
*/ |
| |
static void |
| |
buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value) |
| |
{ |
| |
u_int bytes, bignum_bits; |
| |
int r; |
| |
|
| |
if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0) |
| |
fatal_fr(r, "parse"); |
| |
bytes = (bignum_bits + 7) / 8; |
| |
if (sshbuf_len(b) < bytes) |
| |
fatal_f("input buffer too small: need %d have %zu", |
| |
bytes, sshbuf_len(b)); |
| |
if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL) |
| |
fatal_f("BN_bin2bn failed"); |
| |
if ((r = sshbuf_consume(b, bytes)) != 0) |
| |
fatal_fr(r, "consume"); |
| |
} |
| |
|
| |
static struct sshkey * |
| |
do_convert_private_ssh2(struct sshbuf *b) |
| |
{ |
| |
struct sshkey *key = NULL; |
| |
char *type, *cipher; |
| |
u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345"; |
| |
int r, rlen, ktype; |
| |
u_int magic, i1, i2, i3, i4; |
| |
size_t slen; |
| |
u_long e; |
| |
BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL; |
| |
BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL; |
| |
BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL; |
| |
BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL; |
| |
|
| |
if ((r = sshbuf_get_u32(b, &magic)) != 0) |
| |
fatal_fr(r, "parse magic"); |
| |
|
| |
if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { |
| |
error("bad magic 0x%x != 0x%x", magic, |
| |
SSH_COM_PRIVATE_KEY_MAGIC); |
| |
return NULL; |
| |
} |
| |
if ((r = sshbuf_get_u32(b, &i1)) != 0 || |
| |
(r = sshbuf_get_cstring(b, &type, NULL)) != 0 || |
| |
(r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 || |
| |
(r = sshbuf_get_u32(b, &i2)) != 0 || |
| |
(r = sshbuf_get_u32(b, &i3)) != 0 || |
| |
(r = sshbuf_get_u32(b, &i4)) != 0) |
| |
fatal_fr(r, "parse"); |
| |
debug("ignore (%d %d %d %d)", i1, i2, i3, i4); |
| |
if (strcmp(cipher, "none") != 0) { |
| |
error("unsupported cipher %s", cipher); |
| |
free(cipher); |
| |
free(type); |
| |
return NULL; |
| |
} |
| |
free(cipher); |
| |
|
| |
if (strstr(type, "dsa")) { |
| |
ktype = KEY_DSA; |
| |
} else if (strstr(type, "rsa")) { |
| |
ktype = KEY_RSA; |
| |
} else { |
| |
free(type); |
| |
return NULL; |
| |
} |
| |
if ((key = sshkey_new(ktype)) == NULL) |
| |
fatal("sshkey_new failed"); |
| |
free(type); |
| |
|
| |
switch (key->type) { |
| |
case KEY_DSA: |
| |
if ((dsa_p = BN_new()) == NULL || |
| |
(dsa_q = BN_new()) == NULL || |
| |
(dsa_g = BN_new()) == NULL || |
| |
(dsa_pub_key = BN_new()) == NULL || |
| |
(dsa_priv_key = BN_new()) == NULL) |
| |
fatal_f("BN_new"); |
| |
buffer_get_bignum_bits(b, dsa_p); |
| |
buffer_get_bignum_bits(b, dsa_g); |
| |
buffer_get_bignum_bits(b, dsa_q); |
| |
buffer_get_bignum_bits(b, dsa_pub_key); |
| |
buffer_get_bignum_bits(b, dsa_priv_key); |
| |
if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g)) |
| |
fatal_f("DSA_set0_pqg failed"); |
| |
dsa_p = dsa_q = dsa_g = NULL; /* transferred */ |
| |
if (!DSA_set0_key(key->dsa, dsa_pub_key, dsa_priv_key)) |
| |
fatal_f("DSA_set0_key failed"); |
| |
dsa_pub_key = dsa_priv_key = NULL; /* transferred */ |
| |
break; |
| |
case KEY_RSA: |
| |
if ((r = sshbuf_get_u8(b, &e1)) != 0 || |
| |
(e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) || |
| |
(e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0)) |
| |
fatal_fr(r, "parse RSA"); |
| |
e = e1; |
| |
debug("e %lx", e); |
| |
if (e < 30) { |
| |
e <<= 8; |
| |
e += e2; |
| |
debug("e %lx", e); |
| |
e <<= 8; |
| |
e += e3; |
| |
debug("e %lx", e); |
| |
} |
| |
if ((rsa_e = BN_new()) == NULL) |
| |
fatal_f("BN_new"); |
| |
if (!BN_set_word(rsa_e, e)) { |
| |
BN_clear_free(rsa_e); |
| |
sshkey_free(key); |
| |
return NULL; |
| |
} |
| |
if ((rsa_n = BN_new()) == NULL || |
| |
(rsa_d = BN_new()) == NULL || |
| |
(rsa_p = BN_new()) == NULL || |
| |
(rsa_q = BN_new()) == NULL || |
| |
(rsa_iqmp = BN_new()) == NULL) |
| |
fatal_f("BN_new"); |
| |
buffer_get_bignum_bits(b, rsa_d); |
| |
buffer_get_bignum_bits(b, rsa_n); |
| |
buffer_get_bignum_bits(b, rsa_iqmp); |
| |
buffer_get_bignum_bits(b, rsa_q); |
| |
buffer_get_bignum_bits(b, rsa_p); |
| |
if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, rsa_d)) |
| |
fatal_f("RSA_set0_key failed"); |
| |
rsa_n = rsa_e = rsa_d = NULL; /* transferred */ |
| |
if (!RSA_set0_factors(key->rsa, rsa_p, rsa_q)) |
| |
fatal_f("RSA_set0_factors failed"); |
| |
rsa_p = rsa_q = NULL; /* transferred */ |
| |
if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0) |
| |
fatal_fr(r, "generate RSA parameters"); |
| |
BN_clear_free(rsa_iqmp); |
| |
break; |
| |
} |
| |
rlen = sshbuf_len(b); |
| |
if (rlen != 0) |
| |
error_f("remaining bytes in key blob %d", rlen); |
| |
|
| |
/* try the key */ |
| |
if ((r = sshkey_sign(key, &sig, &slen, data, sizeof(data), |
| |
NULL, NULL, NULL, 0)) != 0) |
| |
error_fr(r, "signing with converted key failed"); |
| |
else if ((r = sshkey_verify(key, sig, slen, data, sizeof(data), |
| |
NULL, 0, NULL)) != 0) |
| |
error_fr(r, "verification with converted key failed"); |
| |
if (r != 0) { |
| |
sshkey_free(key); |
| |
free(sig); |
| |
return NULL; |
| |
} |
| |
free(sig); |
| |
return key; |
| |
} |
| |
|
| |
static int |
| |
get_line(FILE *fp, char *line, size_t len) |
| |
{ |
| |
int c; |
| |
size_t pos = 0; |
| |
|
| |
line[0] = '\0'; |
| |
while ((c = fgetc(fp)) != EOF) { |
| |
if (pos >= len - 1) |
| |
fatal("input line too long."); |
| |
switch (c) { |
| |
case '\r': |
| |
c = fgetc(fp); |
| |
if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) |
| |
fatal("unget: %s", strerror(errno)); |
| |
return pos; |
| |
case '\n': |
| |
return pos; |
| |
} |
| |
line[pos++] = c; |
| |
line[pos] = '\0'; |
| |
} |
| |
/* We reached EOF */ |
| |
return -1; |
| |
} |
| |
|
| |
static void |
| |
do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private) |
| |
{ |
| |
int r, blen, escaped = 0; |
| |
u_int len; |
| |
char line[1024]; |
| |
struct sshbuf *buf; |
| |
char encoded[8096]; |
| |
FILE *fp; |
| |
|
| |
if ((buf = sshbuf_new()) == NULL) |
| |
fatal("sshbuf_new failed"); |
| |
if ((fp = fopen(identity_file, "r")) == NULL) |
| |
fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| |
encoded[0] = '\0'; |
| |
while ((blen = get_line(fp, line, sizeof(line))) != -1) { |
| |
if (blen > 0 && line[blen - 1] == '\\') |
| |
escaped++; |
| |
if (strncmp(line, "----", 4) == 0 || |
| |
strstr(line, ": ") != NULL) { |
| |
if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
| |
*private = 1; |
| |
if (strstr(line, " END ") != NULL) { |
| |
break; |
| |
} |
| |
/* fprintf(stderr, "ignore: %s", line); */ |
| |
continue; |
| |
} |
| |
if (escaped) { |
| |
escaped--; |
| |
/* fprintf(stderr, "escaped: %s", line); */ |
| |
continue; |
| |
} |
| |
strlcat(encoded, line, sizeof(encoded)); |
| |
} |
| |
len = strlen(encoded); |
| |
if (((len % 4) == 3) && |
| |
(encoded[len-1] == '=') && |
| |
(encoded[len-2] == '=') && |
| |
(encoded[len-3] == '=')) |
| |
encoded[len-3] = '\0'; |
| |
if ((r = sshbuf_b64tod(buf, encoded)) != 0) |
| |
fatal_fr(r, "base64 decode"); |
| |
if (*private) { |
| |
if ((*k = do_convert_private_ssh2(buf)) == NULL) |
| |
fatal_f("private key conversion failed"); |
| |
} else if ((r = sshkey_fromb(buf, k)) != 0) |
| |
fatal_fr(r, "parse key"); |
| |
sshbuf_free(buf); |
| |
fclose(fp); |
| |
} |
| |
|
| |
static void |
| |
do_convert_from_pkcs8(struct sshkey **k, int *private) |
| |
{ |
| |
EVP_PKEY *pubkey; |
| |
FILE *fp; |
| |
|
| |
if ((fp = fopen(identity_file, "r")) == NULL) |
| |
fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| |
if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) { |
| |
fatal_f("%s is not a recognised public key format", |
| |
identity_file); |
| |
} |
| |
fclose(fp); |
| |
switch (EVP_PKEY_base_id(pubkey)) { |
| |
case EVP_PKEY_RSA: |
| |
if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) |
| |
fatal("sshkey_new failed"); |
| |
(*k)->type = KEY_RSA; |
| |
(*k)->rsa = EVP_PKEY_get1_RSA(pubkey); |
| |
break; |
| |
case EVP_PKEY_DSA: |
| |
if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) |
| |
fatal("sshkey_new failed"); |
| |
(*k)->type = KEY_DSA; |
| |
(*k)->dsa = EVP_PKEY_get1_DSA(pubkey); |
| |
break; |
| |
case EVP_PKEY_EC: |
| |
if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) |
| |
fatal("sshkey_new failed"); |
| |
(*k)->type = KEY_ECDSA; |
| |
(*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey); |
| |
(*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa); |
| |
break; |
| |
default: |
| |
fatal_f("unsupported pubkey type %d", |
| |
EVP_PKEY_base_id(pubkey)); |
| |
} |
| |
EVP_PKEY_free(pubkey); |
| |
return; |
| |
} |
| |
|
| |
static void |
| |
do_convert_from_pem(struct sshkey **k, int *private) |
| |
{ |
| |
FILE *fp; |
| |
RSA *rsa; |
| |
|
| |
if ((fp = fopen(identity_file, "r")) == NULL) |
| |
fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| |
if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { |
| |
if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) |
| |
fatal("sshkey_new failed"); |
| |
(*k)->type = KEY_RSA; |
| |
(*k)->rsa = rsa; |
| |
fclose(fp); |
| |
return; |
| |
} |
| |
fatal_f("unrecognised raw private key format"); |
| |
} |
| |
|
| |
static void |
| |
do_convert_from(struct passwd *pw) |
| |
{ |
| |
struct sshkey *k = NULL; |
| |
int r, private = 0, ok = 0; |
| |
struct stat st; |
| |
|
| |
if (!have_identity) |
| |
ask_filename(pw, "Enter file in which the key is"); |
| |
if (stat(identity_file, &st) == -1) |
| |
fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| |
|
| |
switch (convert_format) { |
| |
case FMT_RFC4716: |
| |
do_convert_from_ssh2(pw, &k, &private); |
| |
break; |
| |
case FMT_PKCS8: |
| |
do_convert_from_pkcs8(&k, &private); |
| |
break; |
| |
case FMT_PEM: |
| |
do_convert_from_pem(&k, &private); |
| |
break; |
| |
default: |
| |
fatal_f("unknown key format %d", convert_format); |
| |
} |
| |
|
| |
if (!private) { |
| |
if ((r = sshkey_write(k, stdout)) == 0) |
| |
ok = 1; |
| |
if (ok) |
| |
fprintf(stdout, "\n"); |
| |
} else { |
| |
switch (k->type) { |
| |
case KEY_DSA: |
| |
ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, |
| |
NULL, 0, NULL, NULL); |
| |
break; |
| |
case KEY_ECDSA: |
| |
ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL, |
| |
NULL, 0, NULL, NULL); |
| |
break; |
| |
case KEY_RSA: |
| |
ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, |
| |
NULL, 0, NULL, NULL); |
| |
break; |
| |
default: |
| |
fatal_f("unsupported key type %s", sshkey_type(k)); |
| |
} |
| |
} |
| |
|
| |
if (!ok) |
| |
fatal("key write failed"); |
| |
sshkey_free(k); |
| |
exit(0); |
| |
} |
| |
#endif |
| |
|
| |
static void |
| |
do_print_public(struct passwd *pw) |
| |
{ |
| |
struct sshkey *prv; |
| |
struct stat st; |
| |
int r; |
| |
char *comment = NULL; |
| |
|
| |
if (!have_identity) |
| |
ask_filename(pw, "Enter file in which the key is"); |
| |
if (stat(identity_file, &st) == -1) |
| |
fatal("%s: %s", identity_file, strerror(errno)); |
| |
prv = load_identity(identity_file, &comment); |
| |
if ((r = sshkey_write(prv, stdout)) != 0) |
| |
fatal_fr(r, "write key"); |
| |
if (comment != NULL && *comment != '\0') |
| |
fprintf(stdout, " %s", comment); |
| |
fprintf(stdout, "\n"); |
| |
if (sshkey_is_sk(prv)) { |
| |
debug("sk_application: \"%s\", sk_flags 0x%02x", |
| |
prv->sk_application, prv->sk_flags); |
| |
} |
| |
sshkey_free(prv); |
| |
free(comment); |
| |
exit(0); |
| |
} |
| |
|
| |
static void |
| |
do_download(struct passwd *pw) |
| |
{ |
| |
#ifdef ENABLE_PKCS11 |
| |
struct sshkey **keys = NULL; |
| |
int i, nkeys; |
| |
enum sshkey_fp_rep rep; |
| |
int fptype; |
| |
char *fp, *ra, **comments = NULL; |
| |
|
| |
fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; |
| |
rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; |
| |
|
| |
pkcs11_init(1); |
| |
nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys, &comments); |
| |
if (nkeys <= 0) |
| |
fatal("cannot read public key from pkcs11"); |
| |
for (i = 0; i < nkeys; i++) { |
| |
if (print_fingerprint) { |
| |
fp = sshkey_fingerprint(keys[i], fptype, rep); |
| |
ra = sshkey_fingerprint(keys[i], fingerprint_hash, |
| |
SSH_FP_RANDOMART); |
| |
if (fp == NULL || ra == NULL) |
| |
fatal_f("sshkey_fingerprint fail"); |
| |
printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]), |
| |
fp, sshkey_type(keys[i])); |
| |
if (log_level_get() >= SYSLOG_LEVEL_VERBOSE) |
| |
printf("%s\n", ra); |
| |
free(ra); |
| |
free(fp); |
| |
} else { |
| |
(void) sshkey_write(keys[i], stdout); /* XXX check */ |
| |
fprintf(stdout, "%s%s\n", |
| |
*(comments[i]) == '\0' ? "" : " ", comments[i]); |
| |
} |
| |
free(comments[i]); |
| |
sshkey_free(keys[i]); |
| |
} |
| |
free(comments); |
| |
free(keys); |
| |
pkcs11_terminate(); |
| |
exit(0); |
| |
#else |
| |
fatal("no pkcs11 support"); |
| |
#endif /* ENABLE_PKCS11 */ |
| |
} |
| |
|
| |
static struct sshkey * |
| |
try_read_key(char **cpp) |
| |
{ |
| |
struct sshkey *ret; |
| |
int r; |
| |
|
| |
if ((ret = sshkey_new(KEY_UNSPEC)) == NULL) |
| |
fatal("sshkey_new failed"); |
| |
if ((r = sshkey_read(ret, cpp)) == 0) |
| |
return ret; |
| |
/* Not a key */ |
| |
sshkey_free(ret); |
| |
return NULL; |
| |
} |
| |
|
| |
static void |
| |
fingerprint_one_key(const struct sshkey *public, const char *comment) |
| |
{ |
| |
char *fp = NULL, *ra = NULL; |
| |
enum sshkey_fp_rep rep; |
| |
int fptype; |
| |
|
| |
fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; |
| |
rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; |
| |
fp = sshkey_fingerprint(public, fptype, rep); |
| |
ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART); |
| |
if (fp == NULL || ra == NULL) |
| |
fatal_f("sshkey_fingerprint failed"); |
| |
mprintf("%u %s %s (%s)\n", sshkey_size(public), fp, |
| |
comment ? comment : "no comment", sshkey_type(public)); |
| |
if (log_level_get() >= SYSLOG_LEVEL_VERBOSE) |
| |
printf("%s\n", ra); |
| |
free(ra); |
| |
free(fp); |
| |
} |
| |
|
| |
static void |
| |
fingerprint_private(const char *path) |
| |
{ |
| |
struct stat st; |
| |
char *comment = NULL; |
| |
struct sshkey *privkey = NULL, *pubkey = NULL; |
| |
int r; |
| |
|
| |
if (stat(identity_file, &st) == -1) |
| |
fatal("%s: %s", path, strerror(errno)); |
| |
if ((r = sshkey_load_public(path, &pubkey, &comment)) != 0) |
| |
debug_r(r, "load public \"%s\"", path); |
| |
if (pubkey == NULL || comment == NULL || *comment == '\0') { |
| |
free(comment); |
| |
if ((r = sshkey_load_private(path, NULL, |
| |
&privkey, &comment)) != 0) |
| |
debug_r(r, "load private \"%s\"", path); |
| |
} |
| |
if (pubkey == NULL && privkey == NULL) |
| |
fatal("%s is not a key file.", path); |
| |
|
| |
fingerprint_one_key(pubkey == NULL ? privkey : pubkey, comment); |
| |
sshkey_free(pubkey); |
| |
sshkey_free(privkey); |
| |
free(comment); |
| |
} |
| |
|
| |
static void |
| do_fingerprint(struct passwd *pw) |
do_fingerprint(struct passwd *pw) |
| { |
{ |
| char *comment; |
FILE *f; |
| RSA *public_key; |
struct sshkey *public = NULL; |
| struct stat st; |
char *comment = NULL, *cp, *ep, *line = NULL; |
| |
size_t linesize = 0; |
| |
int i, invalid = 1; |
| |
const char *path; |
| |
u_long lnum = 0; |
| |
|
| if (!have_identity) |
if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) < 0) |
path = identity_file; |
| { |
|
| perror(identity_file); |
if (strcmp(identity_file, "-") == 0) { |
| exit(1); |
f = stdin; |
| } |
path = "(stdin)"; |
| public_key = RSA_new(); |
} else if ((f = fopen(path, "r")) == NULL) |
| if (!load_public_key(identity_file, public_key, &comment)) { |
fatal("%s: %s: %s", __progname, path, strerror(errno)); |
| char *cp, line[1024]; |
|
| BIGNUM *e, *n; |
while (getline(&line, &linesize, f) != -1) { |
| int dummy, invalid = 0; |
lnum++; |
| FILE *f = fopen(identity_file, "r"); |
cp = line; |
| n = BN_new(); |
cp[strcspn(cp, "\n")] = '\0'; |
| e = BN_new(); |
/* Trim leading space and comments */ |
| if (f && fgets(line, sizeof(line), f)) { |
cp = line + strspn(line, " \t"); |
| cp = line; |
if (*cp == '#' || *cp == '\0') |
| line[strlen(line)-1] = '\0'; |
continue; |
| if (auth_rsa_read_key(&cp, &dummy, e, n)) { |
|
| public_key->e = e; |
/* |
| public_key->n = n; |
* Input may be plain keys, private keys, authorized_keys |
| comment = xstrdup(cp ? cp : "no comment"); |
* or known_hosts. |
| } else { |
*/ |
| invalid = 1; |
|
| } |
/* |
| } else { |
* Try private keys first. Assume a key is private if |
| invalid = 1; |
* "SSH PRIVATE KEY" appears on the first line and we're |
| } |
* not reading from stdin (XXX support private keys on stdin). |
| if (invalid) { |
*/ |
| printf("%s is not a valid key file.\n", identity_file); |
if (lnum == 1 && strcmp(identity_file, "-") != 0 && |
| BN_free(e); |
strstr(cp, "PRIVATE KEY") != NULL) { |
| BN_free(n); |
free(line); |
| exit(1); |
fclose(f); |
| } |
fingerprint_private(path); |
| } |
exit(0); |
| |
} |
| printf("%d %s %s\n", BN_num_bits(public_key->n), |
|
| fingerprint(public_key->e, public_key->n), |
/* |
| comment); |
* If it's not a private key, then this must be prepared to |
| RSA_free(public_key); |
* accept a public key prefixed with a hostname or options. |
| exit(0); |
* Try a bare key first, otherwise skip the leading stuff. |
| |
*/ |
| |
if ((public = try_read_key(&cp)) == NULL) { |
| |
i = strtol(cp, &ep, 10); |
| |
if (i == 0 || ep == NULL || |
| |
(*ep != ' ' && *ep != '\t')) { |
| |
int quoted = 0; |
| |
|
| |
comment = cp; |
| |
for (; *cp && (quoted || (*cp != ' ' && |
| |
*cp != '\t')); cp++) { |
| |
if (*cp == '\\' && cp[1] == '"') |
| |
cp++; /* Skip both */ |
| |
else if (*cp == '"') |
| |
quoted = !quoted; |
| |
} |
| |
if (!*cp) |
| |
continue; |
| |
*cp++ = '\0'; |
| |
} |
| |
} |
| |
/* Retry after parsing leading hostname/key options */ |
| |
if (public == NULL && (public = try_read_key(&cp)) == NULL) { |
| |
debug("%s:%lu: not a public key", path, lnum); |
| |
continue; |
| |
} |
| |
|
| |
/* Find trailing comment, if any */ |
| |
for (; *cp == ' ' || *cp == '\t'; cp++) |
| |
; |
| |
if (*cp != '\0' && *cp != '#') |
| |
comment = cp; |
| |
|
| |
fingerprint_one_key(public, comment); |
| |
sshkey_free(public); |
| |
invalid = 0; /* One good key in the file is sufficient */ |
| |
} |
| |
fclose(f); |
| |
free(line); |
| |
|
| |
if (invalid) |
| |
fatal("%s is not a public key file.", path); |
| |
exit(0); |
| } |
} |
| |
|
| /* Perform changing a passphrase. The argument is the passwd structure |
static void |
| for the current user. */ |
do_gen_all_hostkeys(struct passwd *pw) |
| |
{ |
| |
struct { |
| |
char *key_type; |
| |
char *key_type_display; |
| |
char *path; |
| |
} key_types[] = { |
| |
#ifdef WITH_OPENSSL |
| |
{ "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE }, |
| |
{ "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE }, |
| |
#endif /* WITH_OPENSSL */ |
| |
{ "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE }, |
| |
#ifdef WITH_XMSS |
| |
{ "xmss", "XMSS",_PATH_HOST_XMSS_KEY_FILE }, |
| |
#endif /* WITH_XMSS */ |
| |
{ NULL, NULL, NULL } |
| |
}; |
| |
|
| void |
u_int32_t bits = 0; |
| |
int first = 0; |
| |
struct stat st; |
| |
struct sshkey *private, *public; |
| |
char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file; |
| |
int i, type, fd, r; |
| |
|
| |
for (i = 0; key_types[i].key_type; i++) { |
| |
public = private = NULL; |
| |
prv_tmp = pub_tmp = prv_file = pub_file = NULL; |
| |
|
| |
xasprintf(&prv_file, "%s%s", |
| |
identity_file, key_types[i].path); |
| |
|
| |
/* Check whether private key exists and is not zero-length */ |
| |
if (stat(prv_file, &st) == 0) { |
| |
if (st.st_size != 0) |
| |
goto next; |
| |
} else if (errno != ENOENT) { |
| |
error("Could not stat %s: %s", key_types[i].path, |
| |
strerror(errno)); |
| |
goto failnext; |
| |
} |
| |
|
| |
/* |
| |
* Private key doesn't exist or is invalid; proceed with |
| |
* key generation. |
| |
*/ |
| |
xasprintf(&prv_tmp, "%s%s.XXXXXXXXXX", |
| |
identity_file, key_types[i].path); |
| |
xasprintf(&pub_tmp, "%s%s.pub.XXXXXXXXXX", |
| |
identity_file, key_types[i].path); |
| |
xasprintf(&pub_file, "%s%s.pub", |
| |
identity_file, key_types[i].path); |
| |
|
| |
if (first == 0) { |
| |
first = 1; |
| |
printf("%s: generating new host keys: ", __progname); |
| |
} |
| |
printf("%s ", key_types[i].key_type_display); |
| |
fflush(stdout); |
| |
type = sshkey_type_from_name(key_types[i].key_type); |
| |
if ((fd = mkstemp(prv_tmp)) == -1) { |
| |
error("Could not save your private key in %s: %s", |
| |
prv_tmp, strerror(errno)); |
| |
goto failnext; |
| |
} |
| |
(void)close(fd); /* just using mkstemp() to reserve a name */ |
| |
bits = 0; |
| |
type_bits_valid(type, NULL, &bits); |
| |
if ((r = sshkey_generate(type, bits, &private)) != 0) { |
| |
error_r(r, "sshkey_generate failed"); |
| |
goto failnext; |
| |
} |
| |
if ((r = sshkey_from_private(private, &public)) != 0) |
| |
fatal_fr(r, "sshkey_from_private"); |
| |
snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, |
| |
hostname); |
| |
if ((r = sshkey_save_private(private, prv_tmp, "", |
| |
comment, private_key_format, openssh_format_cipher, |
| |
rounds)) != 0) { |
| |
error_r(r, "Saving key \"%s\" failed", prv_tmp); |
| |
goto failnext; |
| |
} |
| |
if ((fd = mkstemp(pub_tmp)) == -1) { |
| |
error("Could not save your public key in %s: %s", |
| |
pub_tmp, strerror(errno)); |
| |
goto failnext; |
| |
} |
| |
(void)fchmod(fd, 0644); |
| |
(void)close(fd); |
| |
if ((r = sshkey_save_public(public, pub_tmp, comment)) != 0) { |
| |
error_r(r, "Unable to save public key to %s", |
| |
identity_file); |
| |
goto failnext; |
| |
} |
| |
|
| |
/* Rename temporary files to their permanent locations. */ |
| |
if (rename(pub_tmp, pub_file) != 0) { |
| |
error("Unable to move %s into position: %s", |
| |
pub_file, strerror(errno)); |
| |
goto failnext; |
| |
} |
| |
if (rename(prv_tmp, prv_file) != 0) { |
| |
error("Unable to move %s into position: %s", |
| |
key_types[i].path, strerror(errno)); |
| |
failnext: |
| |
first = 0; |
| |
goto next; |
| |
} |
| |
next: |
| |
sshkey_free(private); |
| |
sshkey_free(public); |
| |
free(prv_tmp); |
| |
free(pub_tmp); |
| |
free(prv_file); |
| |
free(pub_file); |
| |
} |
| |
if (first != 0) |
| |
printf("\n"); |
| |
} |
| |
|
| |
struct known_hosts_ctx { |
| |
const char *host; /* Hostname searched for in find/delete case */ |
| |
FILE *out; /* Output file, stdout for find_hosts case */ |
| |
int has_unhashed; /* When hashing, original had unhashed hosts */ |
| |
int found_key; /* For find/delete, host was found */ |
| |
int invalid; /* File contained invalid items; don't delete */ |
| |
int hash_hosts; /* Hash hostnames as we go */ |
| |
int find_host; /* Search for specific hostname */ |
| |
int delete_host; /* Delete host from known_hosts */ |
| |
}; |
| |
|
| |
static int |
| |
known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx) |
| |
{ |
| |
struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; |
| |
char *hashed, *cp, *hosts, *ohosts; |
| |
int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts); |
| |
int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM; |
| |
|
| |
switch (l->status) { |
| |
case HKF_STATUS_OK: |
| |
case HKF_STATUS_MATCHED: |
| |
/* |
| |
* Don't hash hosts already already hashed, with wildcard |
| |
* characters or a CA/revocation marker. |
| |
*/ |
| |
if (was_hashed || has_wild || l->marker != MRK_NONE) { |
| |
fprintf(ctx->out, "%s\n", l->line); |
| |
if (has_wild && !ctx->find_host) { |
| |
logit("%s:%lu: ignoring host name " |
| |
"with wildcard: %.64s", l->path, |
| |
l->linenum, l->hosts); |
| |
} |
| |
return 0; |
| |
} |
| |
/* |
| |
* Split any comma-separated hostnames from the host list, |
| |
* hash and store separately. |
| |
*/ |
| |
ohosts = hosts = xstrdup(l->hosts); |
| |
while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') { |
| |
lowercase(cp); |
| |
if ((hashed = host_hash(cp, NULL, 0)) == NULL) |
| |
fatal("hash_host failed"); |
| |
fprintf(ctx->out, "%s %s\n", hashed, l->rawkey); |
| |
free(hashed); |
| |
ctx->has_unhashed = 1; |
| |
} |
| |
free(ohosts); |
| |
return 0; |
| |
case HKF_STATUS_INVALID: |
| |
/* Retain invalid lines, but mark file as invalid. */ |
| |
ctx->invalid = 1; |
| |
logit("%s:%lu: invalid line", l->path, l->linenum); |
| |
/* FALLTHROUGH */ |
| |
default: |
| |
fprintf(ctx->out, "%s\n", l->line); |
| |
return 0; |
| |
} |
| |
/* NOTREACHED */ |
| |
return -1; |
| |
} |
| |
|
| |
static int |
| |
known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx) |
| |
{ |
| |
struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; |
| |
enum sshkey_fp_rep rep; |
| |
int fptype; |
| |
char *fp = NULL, *ra = NULL; |
| |
|
| |
fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; |
| |
rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; |
| |
|
| |
if (l->status == HKF_STATUS_MATCHED) { |
| |
if (ctx->delete_host) { |
| |
if (l->marker != MRK_NONE) { |
| |
/* Don't remove CA and revocation lines */ |
| |
fprintf(ctx->out, "%s\n", l->line); |
| |
} else { |
| |
/* |
| |
* Hostname matches and has no CA/revoke |
| |
* marker, delete it by *not* writing the |
| |
* line to ctx->out. |
| |
*/ |
| |
ctx->found_key = 1; |
| |
if (!quiet) |
| |
printf("# Host %s found: line %lu\n", |
| |
ctx->host, l->linenum); |
| |
} |
| |
return 0; |
| |
} else if (ctx->find_host) { |
| |
ctx->found_key = 1; |
| |
if (!quiet) { |
| |
printf("# Host %s found: line %lu %s\n", |
| |
ctx->host, |
| |
l->linenum, l->marker == MRK_CA ? "CA" : |
| |
(l->marker == MRK_REVOKE ? "REVOKED" : "")); |
| |
} |
| |
if (ctx->hash_hosts) |
| |
known_hosts_hash(l, ctx); |
| |
else if (print_fingerprint) { |
| |
fp = sshkey_fingerprint(l->key, fptype, rep); |
| |
ra = sshkey_fingerprint(l->key, |
| |
fingerprint_hash, SSH_FP_RANDOMART); |
| |
if (fp == NULL || ra == NULL) |
| |
fatal_f("sshkey_fingerprint failed"); |
| |
mprintf("%s %s %s%s%s\n", ctx->host, |
| |
sshkey_type(l->key), fp, |
| |
l->comment[0] ? " " : "", |
| |
l->comment); |
| |
if (log_level_get() >= SYSLOG_LEVEL_VERBOSE) |
| |
printf("%s\n", ra); |
| |
free(ra); |
| |
free(fp); |
| |
} else |
| |
fprintf(ctx->out, "%s\n", l->line); |
| |
return 0; |
| |
} |
| |
} else if (ctx->delete_host) { |
| |
/* Retain non-matching hosts when deleting */ |
| |
if (l->status == HKF_STATUS_INVALID) { |
| |
ctx->invalid = 1; |
| |
logit("%s:%lu: invalid line", l->path, l->linenum); |
| |
} |
| |
fprintf(ctx->out, "%s\n", l->line); |
| |
} |
| |
return 0; |
| |
} |
| |
|
| |
static void |
| |
do_known_hosts(struct passwd *pw, const char *name, int find_host, |
| |
int delete_host, int hash_hosts) |
| |
{ |
| |
char *cp, tmp[PATH_MAX], old[PATH_MAX]; |
| |
int r, fd, oerrno, inplace = 0; |
| |
struct known_hosts_ctx ctx; |
| |
u_int foreach_options; |
| |
struct stat sb; |
| |
|
| |
if (!have_identity) { |
| |
cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); |
| |
if (strlcpy(identity_file, cp, sizeof(identity_file)) >= |
| |
sizeof(identity_file)) |
| |
fatal("Specified known hosts path too long"); |
| |
free(cp); |
| |
have_identity = 1; |
| |
} |
| |
if (stat(identity_file, &sb) != 0) |
| |
fatal("Cannot stat %s: %s", identity_file, strerror(errno)); |
| |
|
| |
memset(&ctx, 0, sizeof(ctx)); |
| |
ctx.out = stdout; |
| |
ctx.host = name; |
| |
ctx.hash_hosts = hash_hosts; |
| |
ctx.find_host = find_host; |
| |
ctx.delete_host = delete_host; |
| |
|
| |
/* |
| |
* Find hosts goes to stdout, hash and deletions happen in-place |
| |
* A corner case is ssh-keygen -HF foo, which should go to stdout |
| |
*/ |
| |
if (!find_host && (hash_hosts || delete_host)) { |
| |
if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || |
| |
strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || |
| |
strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || |
| |
strlcat(old, ".old", sizeof(old)) >= sizeof(old)) |
| |
fatal("known_hosts path too long"); |
| |
umask(077); |
| |
if ((fd = mkstemp(tmp)) == -1) |
| |
fatal("mkstemp: %s", strerror(errno)); |
| |
if ((ctx.out = fdopen(fd, "w")) == NULL) { |
| |
oerrno = errno; |
| |
unlink(tmp); |
| |
fatal("fdopen: %s", strerror(oerrno)); |
| |
} |
| |
(void)fchmod(fd, sb.st_mode & 0644); |
| |
inplace = 1; |
| |
} |
| |
/* XXX support identity_file == "-" for stdin */ |
| |
foreach_options = find_host ? HKF_WANT_MATCH : 0; |
| |
foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0; |
| |
if ((r = hostkeys_foreach(identity_file, (find_host || !hash_hosts) ? |
| |
known_hosts_find_delete : known_hosts_hash, &ctx, name, NULL, |
| |
foreach_options, 0)) != 0) { |
| |
if (inplace) |
| |
unlink(tmp); |
| |
fatal_fr(r, "hostkeys_foreach"); |
| |
} |
| |
|
| |
if (inplace) |
| |
fclose(ctx.out); |
| |
|
| |
if (ctx.invalid) { |
| |
error("%s is not a valid known_hosts file.", identity_file); |
| |
if (inplace) { |
| |
error("Not replacing existing known_hosts " |
| |
"file because of errors"); |
| |
unlink(tmp); |
| |
} |
| |
exit(1); |
| |
} else if (delete_host && !ctx.found_key) { |
| |
logit("Host %s not found in %s", name, identity_file); |
| |
if (inplace) |
| |
unlink(tmp); |
| |
} else if (inplace) { |
| |
/* Backup existing file */ |
| |
if (unlink(old) == -1 && errno != ENOENT) |
| |
fatal("unlink %.100s: %s", old, strerror(errno)); |
| |
if (link(identity_file, old) == -1) |
| |
fatal("link %.100s to %.100s: %s", identity_file, old, |
| |
strerror(errno)); |
| |
/* Move new one into place */ |
| |
if (rename(tmp, identity_file) == -1) { |
| |
error("rename\"%s\" to \"%s\": %s", tmp, identity_file, |
| |
strerror(errno)); |
| |
unlink(tmp); |
| |
unlink(old); |
| |
exit(1); |
| |
} |
| |
|
| |
printf("%s updated.\n", identity_file); |
| |
printf("Original contents retained as %s\n", old); |
| |
if (ctx.has_unhashed) { |
| |
logit("WARNING: %s contains unhashed entries", old); |
| |
logit("Delete this file to ensure privacy " |
| |
"of hostnames"); |
| |
} |
| |
} |
| |
|
| |
exit (find_host && !ctx.found_key); |
| |
} |
| |
|
| |
/* |
| |
* Perform changing a passphrase. The argument is the passwd structure |
| |
* for the current user. |
| |
*/ |
| |
static void |
| do_change_passphrase(struct passwd *pw) |
do_change_passphrase(struct passwd *pw) |
| { |
{ |
| char *comment; |
char *comment; |
| char *old_passphrase, *passphrase1, *passphrase2; |
char *old_passphrase, *passphrase1, *passphrase2; |
| struct stat st; |
struct stat st; |
| RSA *private_key; |
struct sshkey *private; |
| |
int r; |
| |
|
| if (!have_identity) |
if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
ask_filename(pw, "Enter file in which the key is"); |
| /* Check if the file exists. */ |
if (stat(identity_file, &st) == -1) |
| if (stat(identity_file, &st) < 0) |
fatal("%s: %s", identity_file, strerror(errno)); |
| { |
/* Try to load the file with empty passphrase. */ |
| perror(identity_file); |
r = sshkey_load_private(identity_file, "", &private, &comment); |
| exit(1); |
if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) { |
| } |
if (identity_passphrase) |
| |
old_passphrase = xstrdup(identity_passphrase); |
| /* Try to load the public key from the file the verify that it is |
else |
| readable and of the proper format. */ |
old_passphrase = |
| public_key = RSA_new(); |
read_passphrase("Enter old passphrase: ", |
| if (!load_public_key(identity_file, public_key, NULL)) |
RP_ALLOW_STDIN); |
| { |
r = sshkey_load_private(identity_file, old_passphrase, |
| printf("%s is not a valid key file.\n", identity_file); |
&private, &comment); |
| exit(1); |
freezero(old_passphrase, strlen(old_passphrase)); |
| } |
if (r != 0) |
| /* Clear the public key since we are just about to load the whole file. */ |
goto badkey; |
| RSA_free(public_key); |
} else if (r != 0) { |
| |
badkey: |
| |
fatal_r(r, "Failed to load key %s", identity_file); |
| |
} |
| |
if (comment) |
| |
mprintf("Key has comment '%s'\n", comment); |
| |
|
| /* Try to load the file with empty passphrase. */ |
/* Ask the new passphrase (twice). */ |
| private_key = RSA_new(); |
if (identity_new_passphrase) { |
| if (!load_private_key(identity_file, "", private_key, &comment)) { |
passphrase1 = xstrdup(identity_new_passphrase); |
| /* Read passphrase from the user. */ |
passphrase2 = NULL; |
| if (identity_passphrase) |
} else { |
| old_passphrase = xstrdup(identity_passphrase); |
passphrase1 = |
| else |
read_passphrase("Enter new passphrase (empty for no " |
| old_passphrase = read_passphrase("Enter old passphrase: ", 1); |
"passphrase): ", RP_ALLOW_STDIN); |
| /* Try to load using the passphrase. */ |
passphrase2 = read_passphrase("Enter same passphrase again: ", |
| if (!load_private_key(identity_file, old_passphrase, private_key, &comment)) |
RP_ALLOW_STDIN); |
| { |
|
| memset(old_passphrase, 0, strlen(old_passphrase)); |
|
| xfree(old_passphrase); |
|
| printf("Bad passphrase.\n"); |
|
| exit(1); |
|
| } |
|
| /* Destroy the passphrase. */ |
|
| memset(old_passphrase, 0, strlen(old_passphrase)); |
|
| xfree(old_passphrase); |
|
| } |
|
| printf("Key has comment '%s'\n", comment); |
|
| |
|
| /* Ask the new passphrase (twice). */ |
|
| if (identity_new_passphrase) |
|
| { |
|
| passphrase1 = xstrdup(identity_new_passphrase); |
|
| passphrase2 = NULL; |
|
| } |
|
| else |
|
| { |
|
| passphrase1 = |
|
| read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); |
|
| passphrase2 = read_passphrase("Enter same passphrase again: ", 1); |
|
| |
|
| /* Verify that they are the same. */ |
/* Verify that they are the same. */ |
| if (strcmp(passphrase1, passphrase2) != 0) |
if (strcmp(passphrase1, passphrase2) != 0) { |
| { |
explicit_bzero(passphrase1, strlen(passphrase1)); |
| memset(passphrase1, 0, strlen(passphrase1)); |
explicit_bzero(passphrase2, strlen(passphrase2)); |
| memset(passphrase2, 0, strlen(passphrase2)); |
free(passphrase1); |
| xfree(passphrase1); |
free(passphrase2); |
| xfree(passphrase2); |
printf("Pass phrases do not match. Try again.\n"); |
| printf("Pass phrases do not match. Try again.\n"); |
exit(1); |
| exit(1); |
} |
| |
/* Destroy the other copy. */ |
| |
freezero(passphrase2, strlen(passphrase2)); |
| } |
} |
| /* Destroy the other copy. */ |
|
| memset(passphrase2, 0, strlen(passphrase2)); |
|
| xfree(passphrase2); |
|
| } |
|
| |
|
| /* Save the file using the new passphrase. */ |
/* Save the file using the new passphrase. */ |
| if (!save_private_key(identity_file, passphrase1, private_key, comment)) |
if ((r = sshkey_save_private(private, identity_file, passphrase1, |
| { |
comment, private_key_format, openssh_format_cipher, rounds)) != 0) { |
| printf("Saving the key failed: %s: %s.\n", |
error_r(r, "Saving key \"%s\" failed", identity_file); |
| identity_file, strerror(errno)); |
freezero(passphrase1, strlen(passphrase1)); |
| memset(passphrase1, 0, strlen(passphrase1)); |
sshkey_free(private); |
| xfree(passphrase1); |
free(comment); |
| RSA_free(private_key); |
exit(1); |
| xfree(comment); |
} |
| exit(1); |
/* Destroy the passphrase and the copy of the key in memory. */ |
| } |
freezero(passphrase1, strlen(passphrase1)); |
| /* Destroy the passphrase and the copy of the key in memory. */ |
sshkey_free(private); /* Destroys contents */ |
| memset(passphrase1, 0, strlen(passphrase1)); |
free(comment); |
| xfree(passphrase1); |
|
| RSA_free(private_key); /* Destroys contents */ |
|
| xfree(comment); |
|
| |
|
| printf("Your identification has been saved with the new passphrase.\n"); |
printf("Your identification has been saved with the new passphrase.\n"); |
| exit(0); |
exit(0); |
| } |
} |
| |
|
| /* Change the comment of a private key file. */ |
/* |
| |
* Print the SSHFP RR. |
| |
*/ |
| |
static int |
| |
do_print_resource_record(struct passwd *pw, char *fname, char *hname, |
| |
int print_generic, char * const *opts, size_t nopts) |
| |
{ |
| |
struct sshkey *public; |
| |
char *comment = NULL; |
| |
struct stat st; |
| |
int r, hash = -1; |
| |
size_t i; |
| |
|
| void |
for (i = 0; i < nopts; i++) { |
| do_change_comment(struct passwd *pw) |
if (strncasecmp(opts[i], "hashalg=", 8) == 0) { |
| |
if ((hash = ssh_digest_alg_by_name(opts[i] + 8)) == -1) |
| |
fatal("Unsupported hash algorithm"); |
| |
} else { |
| |
error("Invalid option \"%s\"", opts[i]); |
| |
return SSH_ERR_INVALID_ARGUMENT; |
| |
} |
| |
} |
| |
if (fname == NULL) |
| |
fatal_f("no filename"); |
| |
if (stat(fname, &st) == -1) { |
| |
if (errno == ENOENT) |
| |
return 0; |
| |
fatal("%s: %s", fname, strerror(errno)); |
| |
} |
| |
if ((r = sshkey_load_public(fname, &public, &comment)) != 0) |
| |
fatal_r(r, "Failed to read v2 public key from \"%s\"", fname); |
| |
export_dns_rr(hname, public, stdout, print_generic, hash); |
| |
sshkey_free(public); |
| |
free(comment); |
| |
return 1; |
| |
} |
| |
|
| |
/* |
| |
* Change the comment of a private key file. |
| |
*/ |
| |
static void |
| |
do_change_comment(struct passwd *pw, const char *identity_comment) |
| { |
{ |
| char new_comment[1024], *comment; |
char new_comment[1024], *comment, *passphrase; |
| RSA *private_key; |
struct sshkey *private; |
| char *passphrase; |
struct sshkey *public; |
| struct stat st; |
struct stat st; |
| FILE *f; |
int r; |
| char *tmpbuf; |
|
| |
|
| if (!have_identity) |
if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
ask_filename(pw, "Enter file in which the key is"); |
| /* Check if the file exists. */ |
if (stat(identity_file, &st) == -1) |
| if (stat(identity_file, &st) < 0) |
fatal("%s: %s", identity_file, strerror(errno)); |
| { |
if ((r = sshkey_load_private(identity_file, "", |
| perror(identity_file); |
&private, &comment)) == 0) |
| exit(1); |
passphrase = xstrdup(""); |
| } |
else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) |
| |
fatal_r(r, "Cannot load private key \"%s\"", identity_file); |
| /* Try to load the public key from the file the verify that it is |
else { |
| readable and of the proper format. */ |
if (identity_passphrase) |
| public_key = RSA_new(); |
passphrase = xstrdup(identity_passphrase); |
| if (!load_public_key(identity_file, public_key, NULL)) |
else if (identity_new_passphrase) |
| { |
passphrase = xstrdup(identity_new_passphrase); |
| printf("%s is not a valid key file.\n", identity_file); |
else |
| exit(1); |
passphrase = read_passphrase("Enter passphrase: ", |
| } |
RP_ALLOW_STDIN); |
| |
/* Try to load using the passphrase. */ |
| |
if ((r = sshkey_load_private(identity_file, passphrase, |
| |
&private, &comment)) != 0) { |
| |
freezero(passphrase, strlen(passphrase)); |
| |
fatal_r(r, "Cannot load private key \"%s\"", |
| |
identity_file); |
| |
} |
| |
} |
| |
|
| private_key = RSA_new(); |
if (private->type != KEY_ED25519 && private->type != KEY_XMSS && |
| /* Try to load the file with empty passphrase. */ |
private_key_format != SSHKEY_PRIVATE_OPENSSH) { |
| if (load_private_key(identity_file, "", private_key, &comment)) |
error("Comments are only supported for keys stored in " |
| passphrase = xstrdup(""); |
"the new format (-o)."); |
| else |
explicit_bzero(passphrase, strlen(passphrase)); |
| { |
sshkey_free(private); |
| /* Read passphrase from the user. */ |
exit(1); |
| if (identity_passphrase) |
} |
| passphrase = xstrdup(identity_passphrase); |
if (comment) |
| else |
printf("Old comment: %s\n", comment); |
| |
else |
| |
printf("No existing comment\n"); |
| |
|
| |
if (identity_comment) { |
| |
strlcpy(new_comment, identity_comment, sizeof(new_comment)); |
| |
} else { |
| |
printf("New comment: "); |
| |
fflush(stdout); |
| |
if (!fgets(new_comment, sizeof(new_comment), stdin)) { |
| |
explicit_bzero(passphrase, strlen(passphrase)); |
| |
sshkey_free(private); |
| |
exit(1); |
| |
} |
| |
new_comment[strcspn(new_comment, "\n")] = '\0'; |
| |
} |
| |
if (comment != NULL && strcmp(comment, new_comment) == 0) { |
| |
printf("No change to comment\n"); |
| |
free(passphrase); |
| |
sshkey_free(private); |
| |
free(comment); |
| |
exit(0); |
| |
} |
| |
|
| |
/* Save the file using the new passphrase. */ |
| |
if ((r = sshkey_save_private(private, identity_file, passphrase, |
| |
new_comment, private_key_format, openssh_format_cipher, |
| |
rounds)) != 0) { |
| |
error_r(r, "Saving key \"%s\" failed", identity_file); |
| |
freezero(passphrase, strlen(passphrase)); |
| |
sshkey_free(private); |
| |
free(comment); |
| |
exit(1); |
| |
} |
| |
freezero(passphrase, strlen(passphrase)); |
| |
if ((r = sshkey_from_private(private, &public)) != 0) |
| |
fatal_fr(r, "sshkey_from_private"); |
| |
sshkey_free(private); |
| |
|
| |
strlcat(identity_file, ".pub", sizeof(identity_file)); |
| |
if ((r = sshkey_save_public(public, identity_file, new_comment)) != 0) |
| |
fatal_r(r, "Unable to save public key to %s", identity_file); |
| |
sshkey_free(public); |
| |
free(comment); |
| |
|
| |
if (strlen(new_comment) > 0) |
| |
printf("Comment '%s' applied\n", new_comment); |
| |
else |
| |
printf("Comment removed\n"); |
| |
|
| |
exit(0); |
| |
} |
| |
|
| |
static void |
| |
cert_ext_add(const char *key, const char *value, int iscrit) |
| |
{ |
| |
cert_ext = xreallocarray(cert_ext, ncert_ext + 1, sizeof(*cert_ext)); |
| |
cert_ext[ncert_ext].key = xstrdup(key); |
| |
cert_ext[ncert_ext].val = value == NULL ? NULL : xstrdup(value); |
| |
cert_ext[ncert_ext].crit = iscrit; |
| |
ncert_ext++; |
| |
} |
| |
|
| |
/* qsort(3) comparison function for certificate extensions */ |
| |
static int |
| |
cert_ext_cmp(const void *_a, const void *_b) |
| |
{ |
| |
const struct cert_ext *a = (const struct cert_ext *)_a; |
| |
const struct cert_ext *b = (const struct cert_ext *)_b; |
| |
int r; |
| |
|
| |
if (a->crit != b->crit) |
| |
return (a->crit < b->crit) ? -1 : 1; |
| |
if ((r = strcmp(a->key, b->key)) != 0) |
| |
return r; |
| |
if ((a->val == NULL) != (b->val == NULL)) |
| |
return (a->val == NULL) ? -1 : 1; |
| |
if (a->val != NULL && (r = strcmp(a->val, b->val)) != 0) |
| |
return r; |
| |
return 0; |
| |
} |
| |
|
| |
#define OPTIONS_CRITICAL 1 |
| |
#define OPTIONS_EXTENSIONS 2 |
| |
static void |
| |
prepare_options_buf(struct sshbuf *c, int which) |
| |
{ |
| |
struct sshbuf *b; |
| |
size_t i; |
| |
int r; |
| |
const struct cert_ext *ext; |
| |
|
| |
if ((b = sshbuf_new()) == NULL) |
| |
fatal_f("sshbuf_new failed"); |
| |
sshbuf_reset(c); |
| |
for (i = 0; i < ncert_ext; i++) { |
| |
ext = &cert_ext[i]; |
| |
if ((ext->crit && (which & OPTIONS_EXTENSIONS)) || |
| |
(!ext->crit && (which & OPTIONS_CRITICAL))) |
| |
continue; |
| |
if (ext->val == NULL) { |
| |
/* flag option */ |
| |
debug3_f("%s", ext->key); |
| |
if ((r = sshbuf_put_cstring(c, ext->key)) != 0 || |
| |
(r = sshbuf_put_string(c, NULL, 0)) != 0) |
| |
fatal_fr(r, "prepare flag"); |
| |
} else { |
| |
/* key/value option */ |
| |
debug3_f("%s=%s", ext->key, ext->val); |
| |
sshbuf_reset(b); |
| |
if ((r = sshbuf_put_cstring(c, ext->key)) != 0 || |
| |
(r = sshbuf_put_cstring(b, ext->val)) != 0 || |
| |
(r = sshbuf_put_stringb(c, b)) != 0) |
| |
fatal_fr(r, "prepare k/v"); |
| |
} |
| |
} |
| |
sshbuf_free(b); |
| |
} |
| |
|
| |
static void |
| |
finalise_cert_exts(void) |
| |
{ |
| |
/* critical options */ |
| |
if (certflags_command != NULL) |
| |
cert_ext_add("force-command", certflags_command, 1); |
| |
if (certflags_src_addr != NULL) |
| |
cert_ext_add("source-address", certflags_src_addr, 1); |
| |
if ((certflags_flags & CERTOPT_REQUIRE_VERIFY) != 0) |
| |
cert_ext_add("verify-required", NULL, 1); |
| |
/* extensions */ |
| |
if ((certflags_flags & CERTOPT_X_FWD) != 0) |
| |
cert_ext_add("permit-X11-forwarding", NULL, 0); |
| |
if ((certflags_flags & CERTOPT_AGENT_FWD) != 0) |
| |
cert_ext_add("permit-agent-forwarding", NULL, 0); |
| |
if ((certflags_flags & CERTOPT_PORT_FWD) != 0) |
| |
cert_ext_add("permit-port-forwarding", NULL, 0); |
| |
if ((certflags_flags & CERTOPT_PTY) != 0) |
| |
cert_ext_add("permit-pty", NULL, 0); |
| |
if ((certflags_flags & CERTOPT_USER_RC) != 0) |
| |
cert_ext_add("permit-user-rc", NULL, 0); |
| |
if ((certflags_flags & CERTOPT_NO_REQUIRE_USER_PRESENCE) != 0) |
| |
cert_ext_add("no-touch-required", NULL, 0); |
| |
/* order lexically by key */ |
| |
if (ncert_ext > 0) |
| |
qsort(cert_ext, ncert_ext, sizeof(*cert_ext), cert_ext_cmp); |
| |
} |
| |
|
| |
static struct sshkey * |
| |
load_pkcs11_key(char *path) |
| |
{ |
| |
#ifdef ENABLE_PKCS11 |
| |
struct sshkey **keys = NULL, *public, *private = NULL; |
| |
int r, i, nkeys; |
| |
|
| |
if ((r = sshkey_load_public(path, &public, NULL)) != 0) |
| |
fatal_r(r, "Couldn't load CA public key \"%s\"", path); |
| |
|
| |
nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, |
| |
&keys, NULL); |
| |
debug3_f("%d keys", nkeys); |
| |
if (nkeys <= 0) |
| |
fatal("cannot read public key from pkcs11"); |
| |
for (i = 0; i < nkeys; i++) { |
| |
if (sshkey_equal_public(public, keys[i])) { |
| |
private = keys[i]; |
| |
continue; |
| |
} |
| |
sshkey_free(keys[i]); |
| |
} |
| |
free(keys); |
| |
sshkey_free(public); |
| |
return private; |
| |
#else |
| |
fatal("no pkcs11 support"); |
| |
#endif /* ENABLE_PKCS11 */ |
| |
} |
| |
|
| |
/* Signer for sshkey_certify_custom that uses the agent */ |
| |
static int |
| |
agent_signer(struct sshkey *key, u_char **sigp, size_t *lenp, |
| |
const u_char *data, size_t datalen, |
| |
const char *alg, const char *provider, const char *pin, |
| |
u_int compat, void *ctx) |
| |
{ |
| |
int *agent_fdp = (int *)ctx; |
| |
|
| |
return ssh_agent_sign(*agent_fdp, key, sigp, lenp, |
| |
data, datalen, alg, compat); |
| |
} |
| |
|
| |
static void |
| |
do_ca_sign(struct passwd *pw, const char *ca_key_path, int prefer_agent, |
| |
unsigned long long cert_serial, int cert_serial_autoinc, |
| |
int argc, char **argv) |
| |
{ |
| |
int r, i, found, agent_fd = -1; |
| |
u_int n; |
| |
struct sshkey *ca, *public; |
| |
char valid[64], *otmp, *tmp, *cp, *out, *comment; |
| |
char *ca_fp = NULL, **plist = NULL, *pin = NULL; |
| |
struct ssh_identitylist *agent_ids; |
| |
size_t j; |
| |
struct notifier_ctx *notifier = NULL; |
| |
|
| |
#ifdef ENABLE_PKCS11 |
| |
pkcs11_init(1); |
| |
#endif |
| |
tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); |
| |
if (pkcs11provider != NULL) { |
| |
/* If a PKCS#11 token was specified then try to use it */ |
| |
if ((ca = load_pkcs11_key(tmp)) == NULL) |
| |
fatal("No PKCS#11 key matching %s found", ca_key_path); |
| |
} else if (prefer_agent) { |
| |
/* |
| |
* Agent signature requested. Try to use agent after making |
| |
* sure the public key specified is actually present in the |
| |
* agent. |
| |
*/ |
| |
if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) |
| |
fatal_r(r, "Cannot load CA public key %s", tmp); |
| |
if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) |
| |
fatal_r(r, "Cannot use public key for CA signature"); |
| |
if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0) |
| |
fatal_r(r, "Retrieve agent key list"); |
| |
found = 0; |
| |
for (j = 0; j < agent_ids->nkeys; j++) { |
| |
if (sshkey_equal(ca, agent_ids->keys[j])) { |
| |
found = 1; |
| |
break; |
| |
} |
| |
} |
| |
if (!found) |
| |
fatal("CA key %s not found in agent", tmp); |
| |
ssh_free_identitylist(agent_ids); |
| |
ca->flags |= SSHKEY_FLAG_EXT; |
| |
} else { |
| |
/* CA key is assumed to be a private key on the filesystem */ |
| |
ca = load_identity(tmp, NULL); |
| |
if (sshkey_is_sk(ca) && |
| |
(ca->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) { |
| |
if ((pin = read_passphrase("Enter PIN for CA key: ", |
| |
RP_ALLOW_STDIN)) == NULL) |
| |
fatal_f("couldn't read PIN"); |
| |
} |
| |
} |
| |
free(tmp); |
| |
|
| |
if (key_type_name != NULL) { |
| |
if (sshkey_type_from_name(key_type_name) != ca->type) { |
| |
fatal("CA key type %s doesn't match specified %s", |
| |
sshkey_ssh_name(ca), key_type_name); |
| |
} |
| |
} else if (ca->type == KEY_RSA) { |
| |
/* Default to a good signature algorithm */ |
| |
key_type_name = "rsa-sha2-512"; |
| |
} |
| |
ca_fp = sshkey_fingerprint(ca, fingerprint_hash, SSH_FP_DEFAULT); |
| |
|
| |
finalise_cert_exts(); |
| |
for (i = 0; i < argc; i++) { |
| |
/* Split list of principals */ |
| |
n = 0; |
| |
if (cert_principals != NULL) { |
| |
otmp = tmp = xstrdup(cert_principals); |
| |
plist = NULL; |
| |
for (; (cp = strsep(&tmp, ",")) != NULL; n++) { |
| |
plist = xreallocarray(plist, n + 1, sizeof(*plist)); |
| |
if (*(plist[n] = xstrdup(cp)) == '\0') |
| |
fatal("Empty principal name"); |
| |
} |
| |
free(otmp); |
| |
} |
| |
if (n > SSHKEY_CERT_MAX_PRINCIPALS) |
| |
fatal("Too many certificate principals specified"); |
| |
|
| |
tmp = tilde_expand_filename(argv[i], pw->pw_uid); |
| |
if ((r = sshkey_load_public(tmp, &public, &comment)) != 0) |
| |
fatal_r(r, "load pubkey \"%s\"", tmp); |
| |
if (sshkey_is_cert(public)) |
| |
fatal_f("key \"%s\" type %s cannot be certified", |
| |
tmp, sshkey_type(public)); |
| |
|
| |
/* Prepare certificate to sign */ |
| |
if ((r = sshkey_to_certified(public)) != 0) |
| |
fatal_r(r, "Could not upgrade key %s to certificate", tmp); |
| |
public->cert->type = cert_key_type; |
| |
public->cert->serial = (u_int64_t)cert_serial; |
| |
public->cert->key_id = xstrdup(cert_key_id); |
| |
public->cert->nprincipals = n; |
| |
public->cert->principals = plist; |
| |
public->cert->valid_after = cert_valid_from; |
| |
public->cert->valid_before = cert_valid_to; |
| |
prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL); |
| |
prepare_options_buf(public->cert->extensions, |
| |
OPTIONS_EXTENSIONS); |
| |
if ((r = sshkey_from_private(ca, |
| |
&public->cert->signature_key)) != 0) |
| |
fatal_r(r, "sshkey_from_private (ca key)"); |
| |
|
| |
if (agent_fd != -1 && (ca->flags & SSHKEY_FLAG_EXT) != 0) { |
| |
if ((r = sshkey_certify_custom(public, ca, |
| |
key_type_name, sk_provider, NULL, agent_signer, |
| |
&agent_fd)) != 0) |
| |
fatal_r(r, "Couldn't certify %s via agent", tmp); |
| |
} else { |
| |
if (sshkey_is_sk(ca) && |
| |
(ca->sk_flags & SSH_SK_USER_PRESENCE_REQD)) { |
| |
notifier = notify_start(0, |
| |
"Confirm user presence for key %s %s", |
| |
sshkey_type(ca), ca_fp); |
| |
} |
| |
r = sshkey_certify(public, ca, key_type_name, |
| |
sk_provider, pin); |
| |
notify_complete(notifier, "User presence confirmed"); |
| |
if (r != 0) |
| |
fatal_r(r, "Couldn't certify key %s", tmp); |
| |
} |
| |
|
| |
if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0) |
| |
*cp = '\0'; |
| |
xasprintf(&out, "%s-cert.pub", tmp); |
| |
free(tmp); |
| |
|
| |
if ((r = sshkey_save_public(public, out, comment)) != 0) { |
| |
fatal_r(r, "Unable to save public key to %s", |
| |
identity_file); |
| |
} |
| |
|
| |
if (!quiet) { |
| |
sshkey_format_cert_validity(public->cert, |
| |
valid, sizeof(valid)); |
| |
logit("Signed %s key %s: id \"%s\" serial %llu%s%s " |
| |
"valid %s", sshkey_cert_type(public), |
| |
out, public->cert->key_id, |
| |
(unsigned long long)public->cert->serial, |
| |
cert_principals != NULL ? " for " : "", |
| |
cert_principals != NULL ? cert_principals : "", |
| |
valid); |
| |
} |
| |
|
| |
sshkey_free(public); |
| |
free(out); |
| |
if (cert_serial_autoinc) |
| |
cert_serial++; |
| |
} |
| |
if (pin != NULL) |
| |
freezero(pin, strlen(pin)); |
| |
free(ca_fp); |
| |
#ifdef ENABLE_PKCS11 |
| |
pkcs11_terminate(); |
| |
#endif |
| |
exit(0); |
| |
} |
| |
|
| |
static u_int64_t |
| |
parse_relative_time(const char *s, time_t now) |
| |
{ |
| |
int64_t mul, secs; |
| |
|
| |
mul = *s == '-' ? -1 : 1; |
| |
|
| |
if ((secs = convtime(s + 1)) == -1) |
| |
fatal("Invalid relative certificate time %s", s); |
| |
if (mul == -1 && secs > now) |
| |
fatal("Certificate time %s cannot be represented", s); |
| |
return now + (u_int64_t)(secs * mul); |
| |
} |
| |
|
| |
static void |
| |
parse_hex_u64(const char *s, uint64_t *up) |
| |
{ |
| |
char *ep; |
| |
unsigned long long ull; |
| |
|
| |
errno = 0; |
| |
ull = strtoull(s, &ep, 16); |
| |
if (*s == '\0' || *ep != '\0') |
| |
fatal("Invalid certificate time: not a number"); |
| |
if (errno == ERANGE && ull == ULONG_MAX) |
| |
fatal_fr(SSH_ERR_SYSTEM_ERROR, "Invalid certificate time"); |
| |
*up = (uint64_t)ull; |
| |
} |
| |
|
| |
static void |
| |
parse_cert_times(char *timespec) |
| |
{ |
| |
char *from, *to; |
| |
time_t now = time(NULL); |
| |
int64_t secs; |
| |
|
| |
/* +timespec relative to now */ |
| |
if (*timespec == '+' && strchr(timespec, ':') == NULL) { |
| |
if ((secs = convtime(timespec + 1)) == -1) |
| |
fatal("Invalid relative certificate life %s", timespec); |
| |
cert_valid_to = now + secs; |
| |
/* |
| |
* Backdate certificate one minute to avoid problems on hosts |
| |
* with poorly-synchronised clocks. |
| |
*/ |
| |
cert_valid_from = ((now - 59)/ 60) * 60; |
| |
return; |
| |
} |
| |
|
| |
/* |
| |
* from:to, where |
| |
* from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "always" |
| |
* to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "forever" |
| |
*/ |
| |
from = xstrdup(timespec); |
| |
to = strchr(from, ':'); |
| |
if (to == NULL || from == to || *(to + 1) == '\0') |
| |
fatal("Invalid certificate life specification %s", timespec); |
| |
*to++ = '\0'; |
| |
|
| |
if (*from == '-' || *from == '+') |
| |
cert_valid_from = parse_relative_time(from, now); |
| |
else if (strcmp(from, "always") == 0) |
| |
cert_valid_from = 0; |
| |
else if (strncmp(from, "0x", 2) == 0) |
| |
parse_hex_u64(from, &cert_valid_from); |
| |
else if (parse_absolute_time(from, &cert_valid_from) != 0) |
| |
fatal("Invalid from time \"%s\"", from); |
| |
|
| |
if (*to == '-' || *to == '+') |
| |
cert_valid_to = parse_relative_time(to, now); |
| |
else if (strcmp(to, "forever") == 0) |
| |
cert_valid_to = ~(u_int64_t)0; |
| |
else if (strncmp(to, "0x", 2) == 0) |
| |
parse_hex_u64(to, &cert_valid_to); |
| |
else if (parse_absolute_time(to, &cert_valid_to) != 0) |
| |
fatal("Invalid to time \"%s\"", to); |
| |
|
| |
if (cert_valid_to <= cert_valid_from) |
| |
fatal("Empty certificate validity interval"); |
| |
free(from); |
| |
} |
| |
|
| |
static void |
| |
add_cert_option(char *opt) |
| |
{ |
| |
char *val, *cp; |
| |
int iscrit = 0; |
| |
|
| |
if (strcasecmp(opt, "clear") == 0) |
| |
certflags_flags = 0; |
| |
else if (strcasecmp(opt, "no-x11-forwarding") == 0) |
| |
certflags_flags &= ~CERTOPT_X_FWD; |
| |
else if (strcasecmp(opt, "permit-x11-forwarding") == 0) |
| |
certflags_flags |= CERTOPT_X_FWD; |
| |
else if (strcasecmp(opt, "no-agent-forwarding") == 0) |
| |
certflags_flags &= ~CERTOPT_AGENT_FWD; |
| |
else if (strcasecmp(opt, "permit-agent-forwarding") == 0) |
| |
certflags_flags |= CERTOPT_AGENT_FWD; |
| |
else if (strcasecmp(opt, "no-port-forwarding") == 0) |
| |
certflags_flags &= ~CERTOPT_PORT_FWD; |
| |
else if (strcasecmp(opt, "permit-port-forwarding") == 0) |
| |
certflags_flags |= CERTOPT_PORT_FWD; |
| |
else if (strcasecmp(opt, "no-pty") == 0) |
| |
certflags_flags &= ~CERTOPT_PTY; |
| |
else if (strcasecmp(opt, "permit-pty") == 0) |
| |
certflags_flags |= CERTOPT_PTY; |
| |
else if (strcasecmp(opt, "no-user-rc") == 0) |
| |
certflags_flags &= ~CERTOPT_USER_RC; |
| |
else if (strcasecmp(opt, "permit-user-rc") == 0) |
| |
certflags_flags |= CERTOPT_USER_RC; |
| |
else if (strcasecmp(opt, "touch-required") == 0) |
| |
certflags_flags &= ~CERTOPT_NO_REQUIRE_USER_PRESENCE; |
| |
else if (strcasecmp(opt, "no-touch-required") == 0) |
| |
certflags_flags |= CERTOPT_NO_REQUIRE_USER_PRESENCE; |
| |
else if (strcasecmp(opt, "no-verify-required") == 0) |
| |
certflags_flags &= ~CERTOPT_REQUIRE_VERIFY; |
| |
else if (strcasecmp(opt, "verify-required") == 0) |
| |
certflags_flags |= CERTOPT_REQUIRE_VERIFY; |
| |
else if (strncasecmp(opt, "force-command=", 14) == 0) { |
| |
val = opt + 14; |
| |
if (*val == '\0') |
| |
fatal("Empty force-command option"); |
| |
if (certflags_command != NULL) |
| |
fatal("force-command already specified"); |
| |
certflags_command = xstrdup(val); |
| |
} else if (strncasecmp(opt, "source-address=", 15) == 0) { |
| |
val = opt + 15; |
| |
if (*val == '\0') |
| |
fatal("Empty source-address option"); |
| |
if (certflags_src_addr != NULL) |
| |
fatal("source-address already specified"); |
| |
if (addr_match_cidr_list(NULL, val) != 0) |
| |
fatal("Invalid source-address list"); |
| |
certflags_src_addr = xstrdup(val); |
| |
} else if (strncasecmp(opt, "extension:", 10) == 0 || |
| |
(iscrit = (strncasecmp(opt, "critical:", 9) == 0))) { |
| |
val = xstrdup(strchr(opt, ':') + 1); |
| |
if ((cp = strchr(val, '=')) != NULL) |
| |
*cp++ = '\0'; |
| |
cert_ext_add(val, cp, iscrit); |
| |
free(val); |
| |
} else |
| |
fatal("Unsupported certificate option \"%s\"", opt); |
| |
} |
| |
|
| |
static void |
| |
show_options(struct sshbuf *optbuf, int in_critical) |
| |
{ |
| |
char *name, *arg, *hex; |
| |
struct sshbuf *options, *option = NULL; |
| |
int r; |
| |
|
| |
if ((options = sshbuf_fromb(optbuf)) == NULL) |
| |
fatal_f("sshbuf_fromb failed"); |
| |
while (sshbuf_len(options) != 0) { |
| |
sshbuf_free(option); |
| |
option = NULL; |
| |
if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 || |
| |
(r = sshbuf_froms(options, &option)) != 0) |
| |
fatal_fr(r, "parse option"); |
| |
printf(" %s", name); |
| |
if (!in_critical && |
| |
(strcmp(name, "permit-X11-forwarding") == 0 || |
| |
strcmp(name, "permit-agent-forwarding") == 0 || |
| |
strcmp(name, "permit-port-forwarding") == 0 || |
| |
strcmp(name, "permit-pty") == 0 || |
| |
strcmp(name, "permit-user-rc") == 0 || |
| |
strcmp(name, "no-touch-required") == 0)) { |
| |
printf("\n"); |
| |
} else if (in_critical && |
| |
(strcmp(name, "force-command") == 0 || |
| |
strcmp(name, "source-address") == 0)) { |
| |
if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0) |
| |
fatal_fr(r, "parse critical"); |
| |
printf(" %s\n", arg); |
| |
free(arg); |
| |
} else if (in_critical && |
| |
strcmp(name, "verify-required") == 0) { |
| |
printf("\n"); |
| |
} else if (sshbuf_len(option) > 0) { |
| |
hex = sshbuf_dtob16(option); |
| |
printf(" UNKNOWN OPTION: %s (len %zu)\n", |
| |
hex, sshbuf_len(option)); |
| |
sshbuf_reset(option); |
| |
free(hex); |
| |
} else |
| |
printf(" UNKNOWN FLAG OPTION\n"); |
| |
free(name); |
| |
if (sshbuf_len(option) != 0) |
| |
fatal("Option corrupt: extra data at end"); |
| |
} |
| |
sshbuf_free(option); |
| |
sshbuf_free(options); |
| |
} |
| |
|
| |
static void |
| |
print_cert(struct sshkey *key) |
| |
{ |
| |
char valid[64], *key_fp, *ca_fp; |
| |
u_int i; |
| |
|
| |
key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT); |
| |
ca_fp = sshkey_fingerprint(key->cert->signature_key, |
| |
fingerprint_hash, SSH_FP_DEFAULT); |
| |
if (key_fp == NULL || ca_fp == NULL) |
| |
fatal_f("sshkey_fingerprint fail"); |
| |
sshkey_format_cert_validity(key->cert, valid, sizeof(valid)); |
| |
|
| |
printf(" Type: %s %s certificate\n", sshkey_ssh_name(key), |
| |
sshkey_cert_type(key)); |
| |
printf(" Public key: %s %s\n", sshkey_type(key), key_fp); |
| |
printf(" Signing CA: %s %s (using %s)\n", |
| |
sshkey_type(key->cert->signature_key), ca_fp, |
| |
key->cert->signature_type); |
| |
printf(" Key ID: \"%s\"\n", key->cert->key_id); |
| |
printf(" Serial: %llu\n", (unsigned long long)key->cert->serial); |
| |
printf(" Valid: %s\n", valid); |
| |
printf(" Principals: "); |
| |
if (key->cert->nprincipals == 0) |
| |
printf("(none)\n"); |
| |
else { |
| |
for (i = 0; i < key->cert->nprincipals; i++) |
| |
printf("\n %s", |
| |
key->cert->principals[i]); |
| |
printf("\n"); |
| |
} |
| |
printf(" Critical Options: "); |
| |
if (sshbuf_len(key->cert->critical) == 0) |
| |
printf("(none)\n"); |
| |
else { |
| |
printf("\n"); |
| |
show_options(key->cert->critical, 1); |
| |
} |
| |
printf(" Extensions: "); |
| |
if (sshbuf_len(key->cert->extensions) == 0) |
| |
printf("(none)\n"); |
| |
else { |
| |
printf("\n"); |
| |
show_options(key->cert->extensions, 0); |
| |
} |
| |
} |
| |
|
| |
static void |
| |
do_show_cert(struct passwd *pw) |
| |
{ |
| |
struct sshkey *key = NULL; |
| |
struct stat st; |
| |
int r, is_stdin = 0, ok = 0; |
| |
FILE *f; |
| |
char *cp, *line = NULL; |
| |
const char *path; |
| |
size_t linesize = 0; |
| |
u_long lnum = 0; |
| |
|
| |
if (!have_identity) |
| |
ask_filename(pw, "Enter file in which the key is"); |
| |
if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) == -1) |
| |
fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| |
|
| |
path = identity_file; |
| |
if (strcmp(path, "-") == 0) { |
| |
f = stdin; |
| |
path = "(stdin)"; |
| |
is_stdin = 1; |
| |
} else if ((f = fopen(identity_file, "r")) == NULL) |
| |
fatal("fopen %s: %s", identity_file, strerror(errno)); |
| |
|
| |
while (getline(&line, &linesize, f) != -1) { |
| |
lnum++; |
| |
sshkey_free(key); |
| |
key = NULL; |
| |
/* Trim leading space and comments */ |
| |
cp = line + strspn(line, " \t"); |
| |
if (*cp == '#' || *cp == '\0') |
| |
continue; |
| |
if ((key = sshkey_new(KEY_UNSPEC)) == NULL) |
| |
fatal("sshkey_new"); |
| |
if ((r = sshkey_read(key, &cp)) != 0) { |
| |
error_r(r, "%s:%lu: invalid key", path, lnum); |
| |
continue; |
| |
} |
| |
if (!sshkey_is_cert(key)) { |
| |
error("%s:%lu is not a certificate", path, lnum); |
| |
continue; |
| |
} |
| |
ok = 1; |
| |
if (!is_stdin && lnum == 1) |
| |
printf("%s:\n", path); |
| |
else |
| |
printf("%s:%lu:\n", path, lnum); |
| |
print_cert(key); |
| |
} |
| |
free(line); |
| |
sshkey_free(key); |
| |
fclose(f); |
| |
exit(ok ? 0 : 1); |
| |
} |
| |
|
| |
static void |
| |
load_krl(const char *path, struct ssh_krl **krlp) |
| |
{ |
| |
struct sshbuf *krlbuf; |
| |
int r; |
| |
|
| |
if ((r = sshbuf_load_file(path, &krlbuf)) != 0) |
| |
fatal_r(r, "Unable to load KRL %s", path); |
| |
/* XXX check sigs */ |
| |
if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 || |
| |
*krlp == NULL) |
| |
fatal_r(r, "Invalid KRL file %s", path); |
| |
sshbuf_free(krlbuf); |
| |
} |
| |
|
| |
static void |
| |
hash_to_blob(const char *cp, u_char **blobp, size_t *lenp, |
| |
const char *file, u_long lnum) |
| |
{ |
| |
char *tmp; |
| |
size_t tlen; |
| |
struct sshbuf *b; |
| |
int r; |
| |
|
| |
if (strncmp(cp, "SHA256:", 7) != 0) |
| |
fatal("%s:%lu: unsupported hash algorithm", file, lnum); |
| |
cp += 7; |
| |
|
| |
/* |
| |
* OpenSSH base64 hashes omit trailing '=' |
| |
* characters; put them back for decode. |
| |
*/ |
| |
tlen = strlen(cp); |
| |
tmp = xmalloc(tlen + 4 + 1); |
| |
strlcpy(tmp, cp, tlen + 1); |
| |
while ((tlen % 4) != 0) { |
| |
tmp[tlen++] = '='; |
| |
tmp[tlen] = '\0'; |
| |
} |
| |
if ((b = sshbuf_new()) == NULL) |
| |
fatal_f("sshbuf_new failed"); |
| |
if ((r = sshbuf_b64tod(b, tmp)) != 0) |
| |
fatal_r(r, "%s:%lu: decode hash failed", file, lnum); |
| |
free(tmp); |
| |
*lenp = sshbuf_len(b); |
| |
*blobp = xmalloc(*lenp); |
| |
memcpy(*blobp, sshbuf_ptr(b), *lenp); |
| |
sshbuf_free(b); |
| |
} |
| |
|
| |
static void |
| |
update_krl_from_file(struct passwd *pw, const char *file, int wild_ca, |
| |
const struct sshkey *ca, struct ssh_krl *krl) |
| |
{ |
| |
struct sshkey *key = NULL; |
| |
u_long lnum = 0; |
| |
char *path, *cp, *ep, *line = NULL; |
| |
u_char *blob = NULL; |
| |
size_t blen = 0, linesize = 0; |
| |
unsigned long long serial, serial2; |
| |
int i, was_explicit_key, was_sha1, was_sha256, was_hash, r; |
| |
FILE *krl_spec; |
| |
|
| |
path = tilde_expand_filename(file, pw->pw_uid); |
| |
if (strcmp(path, "-") == 0) { |
| |
krl_spec = stdin; |
| |
free(path); |
| |
path = xstrdup("(standard input)"); |
| |
} else if ((krl_spec = fopen(path, "r")) == NULL) |
| |
fatal("fopen %s: %s", path, strerror(errno)); |
| |
|
| |
if (!quiet) |
| |
printf("Revoking from %s\n", path); |
| |
while (getline(&line, &linesize, krl_spec) != -1) { |
| |
lnum++; |
| |
was_explicit_key = was_sha1 = was_sha256 = was_hash = 0; |
| |
cp = line + strspn(line, " \t"); |
| |
/* Trim trailing space, comments and strip \n */ |
| |
for (i = 0, r = -1; cp[i] != '\0'; i++) { |
| |
if (cp[i] == '#' || cp[i] == '\n') { |
| |
cp[i] = '\0'; |
| |
break; |
| |
} |
| |
if (cp[i] == ' ' || cp[i] == '\t') { |
| |
/* Remember the start of a span of whitespace */ |
| |
if (r == -1) |
| |
r = i; |
| |
} else |
| |
r = -1; |
| |
} |
| |
if (r != -1) |
| |
cp[r] = '\0'; |
| |
if (*cp == '\0') |
| |
continue; |
| |
if (strncasecmp(cp, "serial:", 7) == 0) { |
| |
if (ca == NULL && !wild_ca) { |
| |
fatal("revoking certificates by serial number " |
| |
"requires specification of a CA key"); |
| |
} |
| |
cp += 7; |
| |
cp = cp + strspn(cp, " \t"); |
| |
errno = 0; |
| |
serial = strtoull(cp, &ep, 0); |
| |
if (*cp == '\0' || (*ep != '\0' && *ep != '-')) |
| |
fatal("%s:%lu: invalid serial \"%s\"", |
| |
path, lnum, cp); |
| |
if (errno == ERANGE && serial == ULLONG_MAX) |
| |
fatal("%s:%lu: serial out of range", |
| |
path, lnum); |
| |
serial2 = serial; |
| |
if (*ep == '-') { |
| |
cp = ep + 1; |
| |
errno = 0; |
| |
serial2 = strtoull(cp, &ep, 0); |
| |
if (*cp == '\0' || *ep != '\0') |
| |
fatal("%s:%lu: invalid serial \"%s\"", |
| |
path, lnum, cp); |
| |
if (errno == ERANGE && serial2 == ULLONG_MAX) |
| |
fatal("%s:%lu: serial out of range", |
| |
path, lnum); |
| |
if (serial2 <= serial) |
| |
fatal("%s:%lu: invalid serial range " |
| |
"%llu:%llu", path, lnum, |
| |
(unsigned long long)serial, |
| |
(unsigned long long)serial2); |
| |
} |
| |
if (ssh_krl_revoke_cert_by_serial_range(krl, |
| |
ca, serial, serial2) != 0) { |
| |
fatal_f("revoke serial failed"); |
| |
} |
| |
} else if (strncasecmp(cp, "id:", 3) == 0) { |
| |
if (ca == NULL && !wild_ca) { |
| |
fatal("revoking certificates by key ID " |
| |
"requires specification of a CA key"); |
| |
} |
| |
cp += 3; |
| |
cp = cp + strspn(cp, " \t"); |
| |
if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0) |
| |
fatal_f("revoke key ID failed"); |
| |
} else if (strncasecmp(cp, "hash:", 5) == 0) { |
| |
cp += 5; |
| |
cp = cp + strspn(cp, " \t"); |
| |
hash_to_blob(cp, &blob, &blen, file, lnum); |
| |
r = ssh_krl_revoke_key_sha256(krl, blob, blen); |
| |
if (r != 0) |
| |
fatal_fr(r, "revoke key failed"); |
| |
} else { |
| |
if (strncasecmp(cp, "key:", 4) == 0) { |
| |
cp += 4; |
| |
cp = cp + strspn(cp, " \t"); |
| |
was_explicit_key = 1; |
| |
} else if (strncasecmp(cp, "sha1:", 5) == 0) { |
| |
cp += 5; |
| |
cp = cp + strspn(cp, " \t"); |
| |
was_sha1 = 1; |
| |
} else if (strncasecmp(cp, "sha256:", 7) == 0) { |
| |
cp += 7; |
| |
cp = cp + strspn(cp, " \t"); |
| |
was_sha256 = 1; |
| |
/* |
| |
* Just try to process the line as a key. |
| |
* Parsing will fail if it isn't. |
| |
*/ |
| |
} |
| |
if ((key = sshkey_new(KEY_UNSPEC)) == NULL) |
| |
fatal("sshkey_new"); |
| |
if ((r = sshkey_read(key, &cp)) != 0) |
| |
fatal_r(r, "%s:%lu: invalid key", path, lnum); |
| |
if (was_explicit_key) |
| |
r = ssh_krl_revoke_key_explicit(krl, key); |
| |
else if (was_sha1) { |
| |
if (sshkey_fingerprint_raw(key, |
| |
SSH_DIGEST_SHA1, &blob, &blen) != 0) { |
| |
fatal("%s:%lu: fingerprint failed", |
| |
file, lnum); |
| |
} |
| |
r = ssh_krl_revoke_key_sha1(krl, blob, blen); |
| |
} else if (was_sha256) { |
| |
if (sshkey_fingerprint_raw(key, |
| |
SSH_DIGEST_SHA256, &blob, &blen) != 0) { |
| |
fatal("%s:%lu: fingerprint failed", |
| |
file, lnum); |
| |
} |
| |
r = ssh_krl_revoke_key_sha256(krl, blob, blen); |
| |
} else |
| |
r = ssh_krl_revoke_key(krl, key); |
| |
if (r != 0) |
| |
fatal_fr(r, "revoke key failed"); |
| |
freezero(blob, blen); |
| |
blob = NULL; |
| |
blen = 0; |
| |
sshkey_free(key); |
| |
} |
| |
} |
| |
if (strcmp(path, "-") != 0) |
| |
fclose(krl_spec); |
| |
free(line); |
| |
free(path); |
| |
} |
| |
|
| |
static void |
| |
do_gen_krl(struct passwd *pw, int updating, const char *ca_key_path, |
| |
unsigned long long krl_version, const char *krl_comment, |
| |
int argc, char **argv) |
| |
{ |
| |
struct ssh_krl *krl; |
| |
struct stat sb; |
| |
struct sshkey *ca = NULL; |
| |
int i, r, wild_ca = 0; |
| |
char *tmp; |
| |
struct sshbuf *kbuf; |
| |
|
| |
if (*identity_file == '\0') |
| |
fatal("KRL generation requires an output file"); |
| |
if (stat(identity_file, &sb) == -1) { |
| |
if (errno != ENOENT) |
| |
fatal("Cannot access KRL \"%s\": %s", |
| |
identity_file, strerror(errno)); |
| |
if (updating) |
| |
fatal("KRL \"%s\" does not exist", identity_file); |
| |
} |
| |
if (ca_key_path != NULL) { |
| |
if (strcasecmp(ca_key_path, "none") == 0) |
| |
wild_ca = 1; |
| |
else { |
| |
tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); |
| |
if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) |
| |
fatal_r(r, "Cannot load CA public key %s", tmp); |
| |
free(tmp); |
| |
} |
| |
} |
| |
|
| |
if (updating) |
| |
load_krl(identity_file, &krl); |
| |
else if ((krl = ssh_krl_init()) == NULL) |
| |
fatal("couldn't create KRL"); |
| |
|
| |
if (krl_version != 0) |
| |
ssh_krl_set_version(krl, krl_version); |
| |
if (krl_comment != NULL) |
| |
ssh_krl_set_comment(krl, krl_comment); |
| |
|
| |
for (i = 0; i < argc; i++) |
| |
update_krl_from_file(pw, argv[i], wild_ca, ca, krl); |
| |
|
| |
if ((kbuf = sshbuf_new()) == NULL) |
| |
fatal("sshbuf_new failed"); |
| |
if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0) |
| |
fatal("Couldn't generate KRL"); |
| |
if ((r = sshbuf_write_file(identity_file, kbuf)) != 0) |
| |
fatal("write %s: %s", identity_file, strerror(errno)); |
| |
sshbuf_free(kbuf); |
| |
ssh_krl_free(krl); |
| |
sshkey_free(ca); |
| |
} |
| |
|
| |
static void |
| |
do_check_krl(struct passwd *pw, int print_krl, int argc, char **argv) |
| |
{ |
| |
int i, r, ret = 0; |
| |
char *comment; |
| |
struct ssh_krl *krl; |
| |
struct sshkey *k; |
| |
|
| |
if (*identity_file == '\0') |
| |
fatal("KRL checking requires an input file"); |
| |
load_krl(identity_file, &krl); |
| |
if (print_krl) |
| |
krl_dump(krl, stdout); |
| |
for (i = 0; i < argc; i++) { |
| |
if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0) |
| |
fatal_r(r, "Cannot load public key %s", argv[i]); |
| |
r = ssh_krl_check_key(krl, k); |
| |
printf("%s%s%s%s: %s\n", argv[i], |
| |
*comment ? " (" : "", comment, *comment ? ")" : "", |
| |
r == 0 ? "ok" : "REVOKED"); |
| |
if (r != 0) |
| |
ret = 1; |
| |
sshkey_free(k); |
| |
free(comment); |
| |
} |
| |
ssh_krl_free(krl); |
| |
exit(ret); |
| |
} |
| |
|
| |
static struct sshkey * |
| |
load_sign_key(const char *keypath, const struct sshkey *pubkey) |
| |
{ |
| |
size_t i, slen, plen = strlen(keypath); |
| |
char *privpath = xstrdup(keypath); |
| |
static const char * const suffixes[] = { "-cert.pub", ".pub", NULL }; |
| |
struct sshkey *ret = NULL, *privkey = NULL; |
| |
int r, waspub = 0; |
| |
struct stat st; |
| |
|
| |
/* |
| |
* If passed a public key filename, then try to locate the corresponding |
| |
* private key. This lets us specify certificates on the command-line |
| |
* and have ssh-keygen find the appropriate private key. |
| |
*/ |
| |
for (i = 0; suffixes[i]; i++) { |
| |
slen = strlen(suffixes[i]); |
| |
if (plen <= slen || |
| |
strcmp(privpath + plen - slen, suffixes[i]) != 0) |
| |
continue; |
| |
privpath[plen - slen] = '\0'; |
| |
debug_f("%s looks like a public key, using private key " |
| |
"path %s instead", keypath, privpath); |
| |
waspub = 1; |
| |
} |
| |
if (waspub && stat(privpath, &st) != 0 && errno == ENOENT) |
| |
fatal("No private key found for public key \"%s\"", keypath); |
| |
if ((r = sshkey_load_private(privpath, "", &privkey, NULL)) != 0 && |
| |
(r != SSH_ERR_KEY_WRONG_PASSPHRASE)) { |
| |
debug_fr(r, "load private key \"%s\"", privpath); |
| |
fatal("No private key found for \"%s\"", privpath); |
| |
} else if (privkey == NULL) |
| |
privkey = load_identity(privpath, NULL); |
| |
|
| |
if (!sshkey_equal_public(pubkey, privkey)) { |
| |
error("Public key %s doesn't match private %s", |
| |
keypath, privpath); |
| |
goto done; |
| |
} |
| |
if (sshkey_is_cert(pubkey) && !sshkey_is_cert(privkey)) { |
| |
/* |
| |
* Graft the certificate onto the private key to make |
| |
* it capable of signing. |
| |
*/ |
| |
if ((r = sshkey_to_certified(privkey)) != 0) { |
| |
error_fr(r, "sshkey_to_certified"); |
| |
goto done; |
| |
} |
| |
if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) { |
| |
error_fr(r, "sshkey_cert_copy"); |
| |
goto done; |
| |
} |
| |
} |
| |
/* success */ |
| |
ret = privkey; |
| |
privkey = NULL; |
| |
done: |
| |
sshkey_free(privkey); |
| |
free(privpath); |
| |
return ret; |
| |
} |
| |
|
| |
static int |
| |
sign_one(struct sshkey *signkey, const char *filename, int fd, |
| |
const char *sig_namespace, const char *hashalg, sshsig_signer *signer, |
| |
void *signer_ctx) |
| |
{ |
| |
struct sshbuf *sigbuf = NULL, *abuf = NULL; |
| |
int r = SSH_ERR_INTERNAL_ERROR, wfd = -1, oerrno; |
| |
char *wfile = NULL, *asig = NULL, *fp = NULL; |
| |
char *pin = NULL, *prompt = NULL; |
| |
|
| |
if (!quiet) { |
| |
if (fd == STDIN_FILENO) |
| |
fprintf(stderr, "Signing data on standard input\n"); |
| |
else |
| |
fprintf(stderr, "Signing file %s\n", filename); |
| |
} |
| |
if (signer == NULL && sshkey_is_sk(signkey)) { |
| |
if ((signkey->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) { |
| |
xasprintf(&prompt, "Enter PIN for %s key: ", |
| |
sshkey_type(signkey)); |
| |
if ((pin = read_passphrase(prompt, |
| |
RP_ALLOW_STDIN)) == NULL) |
| |
fatal_f("couldn't read PIN"); |
| |
} |
| |
if ((signkey->sk_flags & SSH_SK_USER_PRESENCE_REQD)) { |
| |
if ((fp = sshkey_fingerprint(signkey, fingerprint_hash, |
| |
SSH_FP_DEFAULT)) == NULL) |
| |
fatal_f("fingerprint failed"); |
| |
fprintf(stderr, "Confirm user presence for key %s %s\n", |
| |
sshkey_type(signkey), fp); |
| |
free(fp); |
| |
} |
| |
} |
| |
if ((r = sshsig_sign_fd(signkey, hashalg, sk_provider, pin, |
| |
fd, sig_namespace, &sigbuf, signer, signer_ctx)) != 0) { |
| |
error_r(r, "Signing %s failed", filename); |
| |
goto out; |
| |
} |
| |
if ((r = sshsig_armor(sigbuf, &abuf)) != 0) { |
| |
error_fr(r, "sshsig_armor"); |
| |
goto out; |
| |
} |
| |
if ((asig = sshbuf_dup_string(abuf)) == NULL) { |
| |
error_f("buffer error"); |
| |
r = SSH_ERR_ALLOC_FAIL; |
| |
goto out; |
| |
} |
| |
|
| |
if (fd == STDIN_FILENO) { |
| |
fputs(asig, stdout); |
| |
fflush(stdout); |
| |
} else { |
| |
xasprintf(&wfile, "%s.sig", filename); |
| |
if (confirm_overwrite(wfile)) { |
| |
if ((wfd = open(wfile, O_WRONLY|O_CREAT|O_TRUNC, |
| |
0666)) == -1) { |
| |
oerrno = errno; |
| |
error("Cannot open %s: %s", |
| |
wfile, strerror(errno)); |
| |
errno = oerrno; |
| |
r = SSH_ERR_SYSTEM_ERROR; |
| |
goto out; |
| |
} |
| |
if (atomicio(vwrite, wfd, asig, |
| |
strlen(asig)) != strlen(asig)) { |
| |
oerrno = errno; |
| |
error("Cannot write to %s: %s", |
| |
wfile, strerror(errno)); |
| |
errno = oerrno; |
| |
r = SSH_ERR_SYSTEM_ERROR; |
| |
goto out; |
| |
} |
| |
if (!quiet) { |
| |
fprintf(stderr, "Write signature to %s\n", |
| |
wfile); |
| |
} |
| |
} |
| |
} |
| |
/* success */ |
| |
r = 0; |
| |
out: |
| |
free(wfile); |
| |
free(prompt); |
| |
free(asig); |
| |
if (pin != NULL) |
| |
freezero(pin, strlen(pin)); |
| |
sshbuf_free(abuf); |
| |
sshbuf_free(sigbuf); |
| |
if (wfd != -1) |
| |
close(wfd); |
| |
return r; |
| |
} |
| |
|
| |
static int |
| |
sig_process_opts(char * const *opts, size_t nopts, char **hashalgp, |
| |
uint64_t *verify_timep, int *print_pubkey) |
| |
{ |
| |
size_t i; |
| |
time_t now; |
| |
|
| |
if (verify_timep != NULL) |
| |
*verify_timep = 0; |
| |
if (print_pubkey != NULL) |
| |
*print_pubkey = 0; |
| |
if (hashalgp != NULL) |
| |
*hashalgp = NULL; |
| |
for (i = 0; i < nopts; i++) { |
| |
if (hashalgp != NULL && |
| |
strncasecmp(opts[i], "hashalg=", 8) == 0) { |
| |
*hashalgp = xstrdup(opts[i] + 8); |
| |
} else if (verify_timep && |
| |
strncasecmp(opts[i], "verify-time=", 12) == 0) { |
| |
if (parse_absolute_time(opts[i] + 12, |
| |
verify_timep) != 0 || *verify_timep == 0) { |
| |
error("Invalid \"verify-time\" option"); |
| |
return SSH_ERR_INVALID_ARGUMENT; |
| |
} |
| |
} else if (print_pubkey && |
| |
strcasecmp(opts[i], "print-pubkey") == 0) { |
| |
*print_pubkey = 1; |
| |
} else { |
| |
error("Invalid option \"%s\"", opts[i]); |
| |
return SSH_ERR_INVALID_ARGUMENT; |
| |
} |
| |
} |
| |
if (verify_timep && *verify_timep == 0) { |
| |
if ((now = time(NULL)) < 0) { |
| |
error("Time is before epoch"); |
| |
return SSH_ERR_INVALID_ARGUMENT; |
| |
} |
| |
*verify_timep = (uint64_t)now; |
| |
} |
| |
return 0; |
| |
} |
| |
|
| |
|
| |
static int |
| |
sig_sign(const char *keypath, const char *sig_namespace, int require_agent, |
| |
int argc, char **argv, char * const *opts, size_t nopts) |
| |
{ |
| |
int i, fd = -1, r, ret = -1; |
| |
int agent_fd = -1; |
| |
struct sshkey *pubkey = NULL, *privkey = NULL, *signkey = NULL; |
| |
sshsig_signer *signer = NULL; |
| |
char *hashalg = NULL; |
| |
|
| |
/* Check file arguments. */ |
| |
for (i = 0; i < argc; i++) { |
| |
if (strcmp(argv[i], "-") != 0) |
| |
continue; |
| |
if (i > 0 || argc > 1) |
| |
fatal("Cannot sign mix of paths and standard input"); |
| |
} |
| |
|
| |
if (sig_process_opts(opts, nopts, &hashalg, NULL, NULL) != 0) |
| |
goto done; /* error already logged */ |
| |
|
| |
if ((r = sshkey_load_public(keypath, &pubkey, NULL)) != 0) { |
| |
error_r(r, "Couldn't load public key %s", keypath); |
| |
goto done; |
| |
} |
| |
|
| |
if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) { |
| |
if (require_agent) |
| |
fatal("Couldn't get agent socket"); |
| |
debug_r(r, "Couldn't get agent socket"); |
| |
} else { |
| |
if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0) |
| |
signer = agent_signer; |
| |
else { |
| |
if (require_agent) |
| |
fatal("Couldn't find key in agent"); |
| |
debug_r(r, "Couldn't find key in agent"); |
| |
} |
| |
} |
| |
|
| |
if (signer == NULL) { |
| |
/* Not using agent - try to load private key */ |
| |
if ((privkey = load_sign_key(keypath, pubkey)) == NULL) |
| |
goto done; |
| |
signkey = privkey; |
| |
} else { |
| |
/* Will use key in agent */ |
| |
signkey = pubkey; |
| |
} |
| |
|
| |
if (argc == 0) { |
| |
if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO, |
| |
sig_namespace, hashalg, signer, &agent_fd)) != 0) |
| |
goto done; |
| |
} else { |
| |
for (i = 0; i < argc; i++) { |
| |
if (strcmp(argv[i], "-") == 0) |
| |
fd = STDIN_FILENO; |
| |
else if ((fd = open(argv[i], O_RDONLY)) == -1) { |
| |
error("Cannot open %s for signing: %s", |
| |
argv[i], strerror(errno)); |
| |
goto done; |
| |
} |
| |
if ((r = sign_one(signkey, argv[i], fd, sig_namespace, |
| |
hashalg, signer, &agent_fd)) != 0) |
| |
goto done; |
| |
if (fd != STDIN_FILENO) |
| |
close(fd); |
| |
fd = -1; |
| |
} |
| |
} |
| |
|
| |
ret = 0; |
| |
done: |
| |
if (fd != -1 && fd != STDIN_FILENO) |
| |
close(fd); |
| |
sshkey_free(pubkey); |
| |
sshkey_free(privkey); |
| |
free(hashalg); |
| |
return ret; |
| |
} |
| |
|
| |
static int |
| |
sig_verify(const char *signature, const char *sig_namespace, |
| |
const char *principal, const char *allowed_keys, const char *revoked_keys, |
| |
char * const *opts, size_t nopts) |
| |
{ |
| |
int r, ret = -1; |
| |
int print_pubkey = 0; |
| |
struct sshbuf *sigbuf = NULL, *abuf = NULL; |
| |
struct sshkey *sign_key = NULL; |
| |
char *fp = NULL; |
| |
struct sshkey_sig_details *sig_details = NULL; |
| |
uint64_t verify_time = 0; |
| |
|
| |
if (sig_process_opts(opts, nopts, NULL, &verify_time, |
| |
&print_pubkey) != 0) |
| |
goto done; /* error already logged */ |
| |
|
| |
memset(&sig_details, 0, sizeof(sig_details)); |
| |
if ((r = sshbuf_load_file(signature, &abuf)) != 0) { |
| |
error_r(r, "Couldn't read signature file"); |
| |
goto done; |
| |
} |
| |
|
| |
if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) { |
| |
error_fr(r, "sshsig_armor"); |
| |
goto done; |
| |
} |
| |
if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace, |
| |
&sign_key, &sig_details)) != 0) |
| |
goto done; /* sshsig_verify() prints error */ |
| |
|
| |
if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash, |
| |
SSH_FP_DEFAULT)) == NULL) |
| |
fatal_f("sshkey_fingerprint failed"); |
| |
debug("Valid (unverified) signature from key %s", fp); |
| |
if (sig_details != NULL) { |
| |
debug2_f("signature details: counter = %u, flags = 0x%02x", |
| |
sig_details->sk_counter, sig_details->sk_flags); |
| |
} |
| |
free(fp); |
| |
fp = NULL; |
| |
|
| |
if (revoked_keys != NULL) { |
| |
if ((r = sshkey_check_revoked(sign_key, revoked_keys)) != 0) { |
| |
debug3_fr(r, "sshkey_check_revoked"); |
| |
goto done; |
| |
} |
| |
} |
| |
|
| |
if (allowed_keys != NULL && (r = sshsig_check_allowed_keys(allowed_keys, |
| |
sign_key, principal, sig_namespace, verify_time)) != 0) { |
| |
debug3_fr(r, "sshsig_check_allowed_keys"); |
| |
goto done; |
| |
} |
| |
/* success */ |
| |
ret = 0; |
| |
done: |
| |
if (!quiet) { |
| |
if (ret == 0) { |
| |
if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash, |
| |
SSH_FP_DEFAULT)) == NULL) |
| |
fatal_f("sshkey_fingerprint failed"); |
| |
if (principal == NULL) { |
| |
printf("Good \"%s\" signature with %s key %s\n", |
| |
sig_namespace, sshkey_type(sign_key), fp); |
| |
|
| |
} else { |
| |
printf("Good \"%s\" signature for %s with %s key %s\n", |
| |
sig_namespace, principal, |
| |
sshkey_type(sign_key), fp); |
| |
} |
| |
} else { |
| |
printf("Could not verify signature.\n"); |
| |
} |
| |
} |
| |
/* Print the signature key if requested */ |
| |
if (ret == 0 && print_pubkey && sign_key != NULL) { |
| |
if ((r = sshkey_write(sign_key, stdout)) == 0) |
| |
fputc('\n', stdout); |
| |
else { |
| |
error_r(r, "Could not print public key.\n"); |
| |
ret = -1; |
| |
} |
| |
} |
| |
sshbuf_free(sigbuf); |
| |
sshbuf_free(abuf); |
| |
sshkey_free(sign_key); |
| |
sshkey_sig_details_free(sig_details); |
| |
free(fp); |
| |
return ret; |
| |
} |
| |
|
| |
static int |
| |
sig_find_principals(const char *signature, const char *allowed_keys, |
| |
char * const *opts, size_t nopts) |
| |
{ |
| |
int r, ret = -1; |
| |
struct sshbuf *sigbuf = NULL, *abuf = NULL; |
| |
struct sshkey *sign_key = NULL; |
| |
char *principals = NULL, *cp, *tmp; |
| |
uint64_t verify_time = 0; |
| |
|
| |
if (sig_process_opts(opts, nopts, NULL, &verify_time, NULL) != 0) |
| |
goto done; /* error already logged */ |
| |
|
| |
if ((r = sshbuf_load_file(signature, &abuf)) != 0) { |
| |
error_r(r, "Couldn't read signature file"); |
| |
goto done; |
| |
} |
| |
if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) { |
| |
error_fr(r, "sshsig_armor"); |
| |
goto done; |
| |
} |
| |
if ((r = sshsig_get_pubkey(sigbuf, &sign_key)) != 0) { |
| |
error_fr(r, "sshsig_get_pubkey"); |
| |
goto done; |
| |
} |
| |
if ((r = sshsig_find_principals(allowed_keys, sign_key, |
| |
verify_time, &principals)) != 0) { |
| |
if (r != SSH_ERR_KEY_NOT_FOUND) |
| |
error_fr(r, "sshsig_find_principal"); |
| |
goto done; |
| |
} |
| |
ret = 0; |
| |
done: |
| |
if (ret == 0 ) { |
| |
/* Emit matching principals one per line */ |
| |
tmp = principals; |
| |
while ((cp = strsep(&tmp, ",")) != NULL && *cp != '\0') |
| |
puts(cp); |
| |
} else { |
| |
fprintf(stderr, "No principal matched.\n"); |
| |
} |
| |
sshbuf_free(sigbuf); |
| |
sshbuf_free(abuf); |
| |
sshkey_free(sign_key); |
| |
free(principals); |
| |
return ret; |
| |
} |
| |
|
| |
static int |
| |
sig_match_principals(const char *allowed_keys, char *principal, |
| |
char * const *opts, size_t nopts) |
| |
{ |
| |
int r; |
| |
char **principals = NULL; |
| |
size_t i, nprincipals = 0; |
| |
|
| |
if ((r = sig_process_opts(opts, nopts, NULL, NULL, NULL)) != 0) |
| |
return r; /* error already logged */ |
| |
|
| |
if ((r = sshsig_match_principals(allowed_keys, principal, |
| |
&principals, &nprincipals)) != 0) { |
| |
debug_f("match: %s", ssh_err(r)); |
| |
fprintf(stderr, "No principal matched.\n"); |
| |
return r; |
| |
} |
| |
for (i = 0; i < nprincipals; i++) { |
| |
printf("%s\n", principals[i]); |
| |
free(principals[i]); |
| |
} |
| |
free(principals); |
| |
|
| |
return 0; |
| |
} |
| |
|
| |
static void |
| |
do_moduli_gen(const char *out_file, char **opts, size_t nopts) |
| |
{ |
| |
#ifdef WITH_OPENSSL |
| |
/* Moduli generation/screening */ |
| |
u_int32_t memory = 0; |
| |
BIGNUM *start = NULL; |
| |
int moduli_bits = 0; |
| |
FILE *out; |
| |
size_t i; |
| |
const char *errstr; |
| |
|
| |
/* Parse options */ |
| |
for (i = 0; i < nopts; i++) { |
| |
if (strncmp(opts[i], "memory=", 7) == 0) { |
| |
memory = (u_int32_t)strtonum(opts[i]+7, 1, |
| |
UINT_MAX, &errstr); |
| |
if (errstr) { |
| |
fatal("Memory limit is %s: %s", |
| |
errstr, opts[i]+7); |
| |
} |
| |
} else if (strncmp(opts[i], "start=", 6) == 0) { |
| |
/* XXX - also compare length against bits */ |
| |
if (BN_hex2bn(&start, opts[i]+6) == 0) |
| |
fatal("Invalid start point."); |
| |
} else if (strncmp(opts[i], "bits=", 5) == 0) { |
| |
moduli_bits = (int)strtonum(opts[i]+5, 1, |
| |
INT_MAX, &errstr); |
| |
if (errstr) { |
| |
fatal("Invalid number: %s (%s)", |
| |
opts[i]+12, errstr); |
| |
} |
| |
} else { |
| |
fatal("Option \"%s\" is unsupported for moduli " |
| |
"generation", opts[i]); |
| |
} |
| |
} |
| |
|
| |
if ((out = fopen(out_file, "w")) == NULL) { |
| |
fatal("Couldn't open modulus candidate file \"%s\": %s", |
| |
out_file, strerror(errno)); |
| |
} |
| |
setvbuf(out, NULL, _IOLBF, 0); |
| |
|
| |
if (moduli_bits == 0) |
| |
moduli_bits = DEFAULT_BITS; |
| |
if (gen_candidates(out, memory, moduli_bits, start) != 0) |
| |
fatal("modulus candidate generation failed"); |
| |
#else /* WITH_OPENSSL */ |
| |
fatal("Moduli generation is not supported"); |
| |
#endif /* WITH_OPENSSL */ |
| |
} |
| |
|
| |
static void |
| |
do_moduli_screen(const char *out_file, char **opts, size_t nopts) |
| |
{ |
| |
#ifdef WITH_OPENSSL |
| |
/* Moduli generation/screening */ |
| |
char *checkpoint = NULL; |
| |
u_int32_t generator_wanted = 0; |
| |
unsigned long start_lineno = 0, lines_to_process = 0; |
| |
int prime_tests = 0; |
| |
FILE *out, *in = stdin; |
| |
size_t i; |
| |
const char *errstr; |
| |
|
| |
/* Parse options */ |
| |
for (i = 0; i < nopts; i++) { |
| |
if (strncmp(opts[i], "lines=", 6) == 0) { |
| |
lines_to_process = strtoul(opts[i]+6, NULL, 10); |
| |
} else if (strncmp(opts[i], "start-line=", 11) == 0) { |
| |
start_lineno = strtoul(opts[i]+11, NULL, 10); |
| |
} else if (strncmp(opts[i], "checkpoint=", 11) == 0) { |
| |
checkpoint = xstrdup(opts[i]+11); |
| |
} else if (strncmp(opts[i], "generator=", 10) == 0) { |
| |
generator_wanted = (u_int32_t)strtonum( |
| |
opts[i]+10, 1, UINT_MAX, &errstr); |
| |
if (errstr != NULL) { |
| |
fatal("Generator invalid: %s (%s)", |
| |
opts[i]+10, errstr); |
| |
} |
| |
} else if (strncmp(opts[i], "prime-tests=", 12) == 0) { |
| |
prime_tests = (int)strtonum(opts[i]+12, 1, |
| |
INT_MAX, &errstr); |
| |
if (errstr) { |
| |
fatal("Invalid number: %s (%s)", |
| |
opts[i]+12, errstr); |
| |
} |
| |
} else { |
| |
fatal("Option \"%s\" is unsupported for moduli " |
| |
"screening", opts[i]); |
| |
} |
| |
} |
| |
|
| |
if (have_identity && strcmp(identity_file, "-") != 0) { |
| |
if ((in = fopen(identity_file, "r")) == NULL) { |
| |
fatal("Couldn't open modulus candidate " |
| |
"file \"%s\": %s", identity_file, |
| |
strerror(errno)); |
| |
} |
| |
} |
| |
|
| |
if ((out = fopen(out_file, "a")) == NULL) { |
| |
fatal("Couldn't open moduli file \"%s\": %s", |
| |
out_file, strerror(errno)); |
| |
} |
| |
setvbuf(out, NULL, _IOLBF, 0); |
| |
if (prime_test(in, out, prime_tests == 0 ? 100 : prime_tests, |
| |
generator_wanted, checkpoint, |
| |
start_lineno, lines_to_process) != 0) |
| |
fatal("modulus screening failed"); |
| |
#else /* WITH_OPENSSL */ |
| |
fatal("Moduli screening is not supported"); |
| |
#endif /* WITH_OPENSSL */ |
| |
} |
| |
|
| |
/* Read and confirm a passphrase */ |
| |
static char * |
| |
read_check_passphrase(const char *prompt1, const char *prompt2, |
| |
const char *retry_prompt) |
| |
{ |
| |
char *passphrase1, *passphrase2; |
| |
|
| |
for (;;) { |
| |
passphrase1 = read_passphrase(prompt1, RP_ALLOW_STDIN); |
| |
passphrase2 = read_passphrase(prompt2, RP_ALLOW_STDIN); |
| |
if (strcmp(passphrase1, passphrase2) == 0) { |
| |
freezero(passphrase2, strlen(passphrase2)); |
| |
return passphrase1; |
| |
} |
| |
/* The passphrases do not match. Clear them and retry. */ |
| |
freezero(passphrase1, strlen(passphrase1)); |
| |
freezero(passphrase2, strlen(passphrase2)); |
| |
fputs(retry_prompt, stdout); |
| |
fputc('\n', stdout); |
| |
fflush(stdout); |
| |
} |
| |
/* NOTREACHED */ |
| |
return NULL; |
| |
} |
| |
|
| |
static char * |
| |
private_key_passphrase(void) |
| |
{ |
| |
if (identity_passphrase) |
| |
return xstrdup(identity_passphrase); |
| if (identity_new_passphrase) |
if (identity_new_passphrase) |
| passphrase = xstrdup(identity_new_passphrase); |
return xstrdup(identity_new_passphrase); |
| |
|
| |
return read_check_passphrase( |
| |
"Enter passphrase (empty for no passphrase): ", |
| |
"Enter same passphrase again: ", |
| |
"Passphrases do not match. Try again."); |
| |
} |
| |
|
| |
static char * |
| |
sk_suffix(const char *application, const uint8_t *user, size_t userlen) |
| |
{ |
| |
char *ret, *cp; |
| |
size_t slen, i; |
| |
|
| |
/* Trim off URL-like preamble */ |
| |
if (strncmp(application, "ssh://", 6) == 0) |
| |
ret = xstrdup(application + 6); |
| |
else if (strncmp(application, "ssh:", 4) == 0) |
| |
ret = xstrdup(application + 4); |
| else |
else |
| passphrase = read_passphrase("Enter passphrase: ", 1); |
ret = xstrdup(application); |
| /* Try to load using the passphrase. */ |
|
| if (!load_private_key(identity_file, passphrase, private_key, &comment)) |
/* Count trailing zeros in user */ |
| { |
for (i = 0; i < userlen; i++) { |
| memset(passphrase, 0, strlen(passphrase)); |
if (user[userlen - i - 1] != 0) |
| xfree(passphrase); |
break; |
| printf("Bad passphrase.\n"); |
|
| exit(1); |
|
| } |
} |
| } |
if (i >= userlen) |
| printf("Key now has comment '%s'\n", comment); |
return ret; /* user-id was default all-zeros */ |
| |
|
| if (identity_comment) |
/* Append user-id, escaping non-UTF-8 characters */ |
| { |
slen = userlen - i; |
| strlcpy(new_comment, identity_comment, sizeof(new_comment)); |
if (asmprintf(&cp, INT_MAX, NULL, "%.*s", (int)slen, user) == -1) |
| } |
fatal_f("asmprintf failed"); |
| else |
/* Don't emit a user-id that contains path or control characters */ |
| { |
if (strchr(cp, '/') != NULL || strstr(cp, "..") != NULL || |
| printf("Enter new comment: "); |
strchr(cp, '\\') != NULL) { |
| fflush(stdout); |
free(cp); |
| if (!fgets(new_comment, sizeof(new_comment), stdin)) |
cp = tohex(user, slen); |
| { |
|
| memset(passphrase, 0, strlen(passphrase)); |
|
| RSA_free(private_key); |
|
| exit(1); |
|
| } |
} |
| |
xextendf(&ret, "_", "%s", cp); |
| /* Remove terminating newline from comment. */ |
free(cp); |
| if (strchr(new_comment, '\n')) |
return ret; |
| *strchr(new_comment, '\n') = 0; |
} |
| } |
|
| |
|
| /* Save the file using the new passphrase. */ |
|
| if (!save_private_key(identity_file, passphrase, private_key, new_comment)) |
|
| { |
|
| printf("Saving the key failed: %s: %s.\n", |
|
| identity_file, strerror(errno)); |
|
| memset(passphrase, 0, strlen(passphrase)); |
|
| xfree(passphrase); |
|
| RSA_free(private_key); |
|
| xfree(comment); |
|
| exit(1); |
|
| } |
|
| |
|
| /* Destroy the passphrase and the private key in memory. */ |
static int |
| memset(passphrase, 0, strlen(passphrase)); |
do_download_sk(const char *skprovider, const char *device) |
| xfree(passphrase); |
{ |
| RSA_free(private_key); |
struct sshsk_resident_key **srks; |
| |
size_t nsrks, i; |
| |
int r, ret = -1; |
| |
char *fp, *pin = NULL, *pass = NULL, *path, *pubpath; |
| |
const char *ext; |
| |
struct sshkey *key; |
| |
|
| /* Save the public key in text format in a file with the same name but |
if (skprovider == NULL) |
| .pub appended. */ |
fatal("Cannot download keys without provider"); |
| strlcat(identity_file, ".pub", sizeof(identity_file)); |
|
| f = fopen(identity_file, "w"); |
|
| if (!f) |
|
| { |
|
| printf("Could not save your public key in %s\n", identity_file); |
|
| exit(1); |
|
| } |
|
| fprintf(f, "%d ", BN_num_bits(public_key->n)); |
|
| tmpbuf = BN_bn2dec(public_key->e); |
|
| fprintf(f, "%s ", tmpbuf); |
|
| free (tmpbuf); |
|
| tmpbuf = BN_bn2dec(public_key->n); |
|
| fprintf(f, "%s %s\n", tmpbuf, new_comment); |
|
| free (tmpbuf); |
|
| fclose(f); |
|
| |
|
| xfree(comment); |
pin = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN); |
| |
if (!quiet) { |
| |
printf("You may need to touch your authenticator " |
| |
"to authorize key download.\n"); |
| |
} |
| |
if ((r = sshsk_load_resident(skprovider, device, pin, 0, |
| |
&srks, &nsrks)) != 0) { |
| |
if (pin != NULL) |
| |
freezero(pin, strlen(pin)); |
| |
error_r(r, "Unable to load resident keys"); |
| |
return -1; |
| |
} |
| |
if (nsrks == 0) |
| |
logit("No keys to download"); |
| |
if (pin != NULL) |
| |
freezero(pin, strlen(pin)); |
| |
|
| printf("The comment in your key file has been changed.\n"); |
for (i = 0; i < nsrks; i++) { |
| exit(0); |
key = srks[i]->key; |
| |
if (key->type != KEY_ECDSA_SK && key->type != KEY_ED25519_SK) { |
| |
error("Unsupported key type %s (%d)", |
| |
sshkey_type(key), key->type); |
| |
continue; |
| |
} |
| |
if ((fp = sshkey_fingerprint(key, fingerprint_hash, |
| |
SSH_FP_DEFAULT)) == NULL) |
| |
fatal_f("sshkey_fingerprint failed"); |
| |
debug_f("key %zu: %s %s %s (flags 0x%02x)", i, |
| |
sshkey_type(key), fp, key->sk_application, key->sk_flags); |
| |
ext = sk_suffix(key->sk_application, |
| |
srks[i]->user_id, srks[i]->user_id_len); |
| |
xasprintf(&path, "id_%s_rk%s%s", |
| |
key->type == KEY_ECDSA_SK ? "ecdsa_sk" : "ed25519_sk", |
| |
*ext == '\0' ? "" : "_", ext); |
| |
|
| |
/* If the file already exists, ask the user to confirm. */ |
| |
if (!confirm_overwrite(path)) { |
| |
free(path); |
| |
break; |
| |
} |
| |
|
| |
/* Save the key with the application string as the comment */ |
| |
if (pass == NULL) |
| |
pass = private_key_passphrase(); |
| |
if ((r = sshkey_save_private(key, path, pass, |
| |
key->sk_application, private_key_format, |
| |
openssh_format_cipher, rounds)) != 0) { |
| |
error_r(r, "Saving key \"%s\" failed", path); |
| |
free(path); |
| |
break; |
| |
} |
| |
if (!quiet) { |
| |
printf("Saved %s key%s%s to %s\n", sshkey_type(key), |
| |
*ext != '\0' ? " " : "", |
| |
*ext != '\0' ? key->sk_application : "", |
| |
path); |
| |
} |
| |
|
| |
/* Save public key too */ |
| |
xasprintf(&pubpath, "%s.pub", path); |
| |
free(path); |
| |
if ((r = sshkey_save_public(key, pubpath, |
| |
key->sk_application)) != 0) { |
| |
error_r(r, "Saving public key \"%s\" failed", pubpath); |
| |
free(pubpath); |
| |
break; |
| |
} |
| |
free(pubpath); |
| |
} |
| |
|
| |
if (i >= nsrks) |
| |
ret = 0; /* success */ |
| |
if (pass != NULL) |
| |
freezero(pass, strlen(pass)); |
| |
sshsk_free_resident_keys(srks, nsrks); |
| |
return ret; |
| } |
} |
| |
|
| void |
static void |
| usage(void) |
save_attestation(struct sshbuf *attest, const char *path) |
| { |
{ |
| printf("ssh-keygen version %s\n", SSH_VERSION); |
mode_t omask; |
| printf("Usage: %s [-b bits] [-p] [-c] [-f file] [-P pass] [-N new-pass] [-C comment]\n", __progname); |
int r; |
| exit(1); |
|
| |
if (path == NULL) |
| |
return; /* nothing to do */ |
| |
if (attest == NULL || sshbuf_len(attest) == 0) |
| |
fatal("Enrollment did not return attestation data"); |
| |
omask = umask(077); |
| |
r = sshbuf_write_file(path, attest); |
| |
umask(omask); |
| |
if (r != 0) |
| |
fatal_r(r, "Unable to write attestation data \"%s\"", path); |
| |
if (!quiet) |
| |
printf("Your FIDO attestation certificate has been saved in " |
| |
"%s\n", path); |
| } |
} |
| |
|
| /* Main program for key management. */ |
static int |
| |
confirm_sk_overwrite(const char *application, const char *user) |
| |
{ |
| |
char yesno[3]; |
| |
|
| |
printf("A resident key scoped to '%s' with user id '%s' already " |
| |
"exists.\n", application == NULL ? "ssh:" : application, |
| |
user == NULL ? "null" : user); |
| |
printf("Overwrite key in token (y/n)? "); |
| |
fflush(stdout); |
| |
if (fgets(yesno, sizeof(yesno), stdin) == NULL) |
| |
return 0; |
| |
if (yesno[0] != 'y' && yesno[0] != 'Y') |
| |
return 0; |
| |
return 1; |
| |
} |
| |
|
| |
static void |
| |
usage(void) |
| |
{ |
| |
fprintf(stderr, |
| |
"usage: ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f output_keyfile]\n" |
| |
" [-m format] [-N new_passphrase] [-O option]\n" |
| |
" [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]\n" |
| |
" [-w provider] [-Z cipher]\n" |
| |
" ssh-keygen -p [-a rounds] [-f keyfile] [-m format] [-N new_passphrase]\n" |
| |
" [-P old_passphrase] [-Z cipher]\n" |
| |
#ifdef WITH_OPENSSL |
| |
" ssh-keygen -i [-f input_keyfile] [-m key_format]\n" |
| |
" ssh-keygen -e [-f input_keyfile] [-m key_format]\n" |
| |
#endif |
| |
" ssh-keygen -y [-f input_keyfile]\n" |
| |
" ssh-keygen -c [-a rounds] [-C comment] [-f keyfile] [-P passphrase]\n" |
| |
" ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n" |
| |
" ssh-keygen -B [-f input_keyfile]\n"); |
| |
#ifdef ENABLE_PKCS11 |
| |
fprintf(stderr, |
| |
" ssh-keygen -D pkcs11\n"); |
| |
#endif |
| |
fprintf(stderr, |
| |
" ssh-keygen -F hostname [-lv] [-f known_hosts_file]\n" |
| |
" ssh-keygen -H [-f known_hosts_file]\n" |
| |
" ssh-keygen -K [-a rounds] [-w provider]\n" |
| |
" ssh-keygen -R hostname [-f known_hosts_file]\n" |
| |
" ssh-keygen -r hostname [-g] [-f input_keyfile]\n" |
| |
#ifdef WITH_OPENSSL |
| |
" ssh-keygen -M generate [-O option] output_file\n" |
| |
" ssh-keygen -M screen [-f input_file] [-O option] output_file\n" |
| |
#endif |
| |
" ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]\n" |
| |
" [-n principals] [-O option] [-V validity_interval]\n" |
| |
" [-z serial_number] file ...\n" |
| |
" ssh-keygen -L [-f input_keyfile]\n" |
| |
" ssh-keygen -A [-a rounds] [-f prefix_path]\n" |
| |
" ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n" |
| |
" file ...\n" |
| |
" ssh-keygen -Q [-l] -f krl_file [file ...]\n" |
| |
" ssh-keygen -Y find-principals -s signature_file -f allowed_signers_file\n" |
| |
" ssh-keygen -Y match-principals -I signer_identity -f allowed_signers_file\n" |
| |
" ssh-keygen -Y check-novalidate -n namespace -s signature_file\n" |
| |
" ssh-keygen -Y sign -f key_file -n namespace file [-O option] ...\n" |
| |
" ssh-keygen -Y verify -f allowed_signers_file -I signer_identity\n" |
| |
" -n namespace -s signature_file [-r krl_file] [-O option]\n"); |
| |
exit(1); |
| |
} |
| |
|
| |
/* |
| |
* Main program for key management. |
| |
*/ |
| int |
int |
| main(int ac, char **av) |
main(int argc, char **argv) |
| { |
{ |
| char dotsshdir[16*1024], comment[1024], *passphrase1, *passphrase2; |
char comment[1024], *passphrase = NULL; |
| struct passwd *pw; |
char *rr_hostname = NULL, *ep, *fp, *ra; |
| char *tmpbuf; |
struct sshkey *private, *public; |
| int opt; |
struct passwd *pw; |
| struct stat st; |
int r, opt, type; |
| FILE *f; |
int change_passphrase = 0, change_comment = 0, show_cert = 0; |
| char hostname[MAXHOSTNAMELEN]; |
int find_host = 0, delete_host = 0, hash_hosts = 0; |
| extern int optind; |
int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0; |
| extern char *optarg; |
int prefer_agent = 0, convert_to = 0, convert_from = 0; |
| |
int print_public = 0, print_generic = 0, cert_serial_autoinc = 0; |
| |
int do_gen_candidates = 0, do_screen_candidates = 0, download_sk = 0; |
| |
unsigned long long cert_serial = 0; |
| |
char *identity_comment = NULL, *ca_key_path = NULL, **opts = NULL; |
| |
char *sk_application = NULL, *sk_device = NULL, *sk_user = NULL; |
| |
char *sk_attestation_path = NULL; |
| |
struct sshbuf *challenge = NULL, *attest = NULL; |
| |
size_t i, nopts = 0; |
| |
u_int32_t bits = 0; |
| |
uint8_t sk_flags = SSH_SK_USER_PRESENCE_REQD; |
| |
const char *errstr; |
| |
int log_level = SYSLOG_LEVEL_INFO; |
| |
char *sign_op = NULL; |
| |
|
| /* check if RSA support exists */ |
extern int optind; |
| if (rsa_alive() == 0) { |
extern char *optarg; |
| extern char *__progname; |
|
| |
|
| fprintf(stderr, |
/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
| "%s: no RSA support in libssl and libcrypto. See ssl(8).\n", |
sanitise_stdfd(); |
| __progname); |
|
| exit(1); |
|
| } |
|
| |
|
| /* Get user\'s passwd structure. We need this for the home directory. */ |
#ifdef WITH_OPENSSL |
| pw = getpwuid(getuid()); |
OpenSSL_add_all_algorithms(); |
| if (!pw) |
#endif |
| { |
log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
| printf("You don't exist, go away!\n"); |
|
| exit(1); |
|
| } |
|
| |
|
| /* Parse command line arguments. */ |
setlocale(LC_CTYPE, ""); |
| while ((opt = getopt(ac, av, "qpclb:f:P:N:C:")) != EOF) |
|
| { |
|
| switch (opt) |
|
| { |
|
| case 'b': |
|
| bits = atoi(optarg); |
|
| if (bits < 512 || bits > 32768) |
|
| { |
|
| printf("Bits has bad value.\n"); |
|
| exit(1); |
|
| } |
|
| break; |
|
| |
|
| case 'l': |
/* we need this for the home * directory. */ |
| print_fingerprint = 1; |
pw = getpwuid(getuid()); |
| break; |
if (!pw) |
| |
fatal("No user exists for uid %lu", (u_long)getuid()); |
| |
pw = pwcopy(pw); |
| |
if (gethostname(hostname, sizeof(hostname)) == -1) |
| |
fatal("gethostname: %s", strerror(errno)); |
| |
|
| case 'p': |
sk_provider = getenv("SSH_SK_PROVIDER"); |
| change_passphrase = 1; |
|
| break; |
|
| |
|
| case 'c': |
/* Remaining characters: dGjJSTWx */ |
| change_comment = 1; |
while ((opt = getopt(argc, argv, "ABHKLQUXceghiklopquvy" |
| break; |
"C:D:E:F:I:M:N:O:P:R:V:Y:Z:" |
| |
"a:b:f:g:m:n:r:s:t:w:z:")) != -1) { |
| |
switch (opt) { |
| |
case 'A': |
| |
gen_all_hostkeys = 1; |
| |
break; |
| |
case 'b': |
| |
bits = (u_int32_t)strtonum(optarg, 1, UINT32_MAX, |
| |
&errstr); |
| |
if (errstr) |
| |
fatal("Bits has bad value %s (%s)", |
| |
optarg, errstr); |
| |
break; |
| |
case 'E': |
| |
fingerprint_hash = ssh_digest_alg_by_name(optarg); |
| |
if (fingerprint_hash == -1) |
| |
fatal("Invalid hash algorithm \"%s\"", optarg); |
| |
break; |
| |
case 'F': |
| |
find_host = 1; |
| |
rr_hostname = optarg; |
| |
break; |
| |
case 'H': |
| |
hash_hosts = 1; |
| |
break; |
| |
case 'I': |
| |
cert_key_id = optarg; |
| |
break; |
| |
case 'R': |
| |
delete_host = 1; |
| |
rr_hostname = optarg; |
| |
break; |
| |
case 'L': |
| |
show_cert = 1; |
| |
break; |
| |
case 'l': |
| |
print_fingerprint = 1; |
| |
break; |
| |
case 'B': |
| |
print_bubblebabble = 1; |
| |
break; |
| |
case 'm': |
| |
if (strcasecmp(optarg, "RFC4716") == 0 || |
| |
strcasecmp(optarg, "ssh2") == 0) { |
| |
convert_format = FMT_RFC4716; |
| |
break; |
| |
} |
| |
if (strcasecmp(optarg, "PKCS8") == 0) { |
| |
convert_format = FMT_PKCS8; |
| |
private_key_format = SSHKEY_PRIVATE_PKCS8; |
| |
break; |
| |
} |
| |
if (strcasecmp(optarg, "PEM") == 0) { |
| |
convert_format = FMT_PEM; |
| |
private_key_format = SSHKEY_PRIVATE_PEM; |
| |
break; |
| |
} |
| |
fatal("Unsupported conversion format \"%s\"", optarg); |
| |
case 'n': |
| |
cert_principals = optarg; |
| |
break; |
| |
case 'o': |
| |
/* no-op; new format is already the default */ |
| |
break; |
| |
case 'p': |
| |
change_passphrase = 1; |
| |
break; |
| |
case 'c': |
| |
change_comment = 1; |
| |
break; |
| |
case 'f': |
| |
if (strlcpy(identity_file, optarg, |
| |
sizeof(identity_file)) >= sizeof(identity_file)) |
| |
fatal("Identity filename too long"); |
| |
have_identity = 1; |
| |
break; |
| |
case 'g': |
| |
print_generic = 1; |
| |
break; |
| |
case 'K': |
| |
download_sk = 1; |
| |
break; |
| |
case 'P': |
| |
identity_passphrase = optarg; |
| |
break; |
| |
case 'N': |
| |
identity_new_passphrase = optarg; |
| |
break; |
| |
case 'Q': |
| |
check_krl = 1; |
| |
break; |
| |
case 'O': |
| |
opts = xrecallocarray(opts, nopts, nopts + 1, |
| |
sizeof(*opts)); |
| |
opts[nopts++] = xstrdup(optarg); |
| |
break; |
| |
case 'Z': |
| |
openssh_format_cipher = optarg; |
| |
if (cipher_by_name(openssh_format_cipher) == NULL) |
| |
fatal("Invalid OpenSSH-format cipher '%s'", |
| |
openssh_format_cipher); |
| |
break; |
| |
case 'C': |
| |
identity_comment = optarg; |
| |
break; |
| |
case 'q': |
| |
quiet = 1; |
| |
break; |
| |
case 'e': |
| |
/* export key */ |
| |
convert_to = 1; |
| |
break; |
| |
case 'h': |
| |
cert_key_type = SSH2_CERT_TYPE_HOST; |
| |
certflags_flags = 0; |
| |
break; |
| |
case 'k': |
| |
gen_krl = 1; |
| |
break; |
| |
case 'i': |
| |
case 'X': |
| |
/* import key */ |
| |
convert_from = 1; |
| |
break; |
| |
case 'y': |
| |
print_public = 1; |
| |
break; |
| |
case 's': |
| |
ca_key_path = optarg; |
| |
break; |
| |
case 't': |
| |
key_type_name = optarg; |
| |
break; |
| |
case 'D': |
| |
pkcs11provider = optarg; |
| |
break; |
| |
case 'U': |
| |
prefer_agent = 1; |
| |
break; |
| |
case 'u': |
| |
update_krl = 1; |
| |
break; |
| |
case 'v': |
| |
if (log_level == SYSLOG_LEVEL_INFO) |
| |
log_level = SYSLOG_LEVEL_DEBUG1; |
| |
else { |
| |
if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
| |
log_level < SYSLOG_LEVEL_DEBUG3) |
| |
log_level++; |
| |
} |
| |
break; |
| |
case 'r': |
| |
rr_hostname = optarg; |
| |
break; |
| |
case 'a': |
| |
rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr); |
| |
if (errstr) |
| |
fatal("Invalid number: %s (%s)", |
| |
optarg, errstr); |
| |
break; |
| |
case 'V': |
| |
parse_cert_times(optarg); |
| |
break; |
| |
case 'Y': |
| |
sign_op = optarg; |
| |
break; |
| |
case 'w': |
| |
sk_provider = optarg; |
| |
break; |
| |
case 'z': |
| |
errno = 0; |
| |
if (*optarg == '+') { |
| |
cert_serial_autoinc = 1; |
| |
optarg++; |
| |
} |
| |
cert_serial = strtoull(optarg, &ep, 10); |
| |
if (*optarg < '0' || *optarg > '9' || *ep != '\0' || |
| |
(errno == ERANGE && cert_serial == ULLONG_MAX)) |
| |
fatal("Invalid serial number \"%s\"", optarg); |
| |
break; |
| |
case 'M': |
| |
if (strcmp(optarg, "generate") == 0) |
| |
do_gen_candidates = 1; |
| |
else if (strcmp(optarg, "screen") == 0) |
| |
do_screen_candidates = 1; |
| |
else |
| |
fatal("Unsupported moduli option %s", optarg); |
| |
break; |
| |
default: |
| |
usage(); |
| |
} |
| |
} |
| |
|
| case 'f': |
if (sk_provider == NULL) |
| strlcpy(identity_file, optarg, sizeof(identity_file)); |
sk_provider = "internal"; |
| have_identity = 1; |
|
| break; |
|
| |
|
| case 'P': |
|
| identity_passphrase = optarg; |
|
| break; |
|
| |
|
| case 'N': |
/* reinit */ |
| identity_new_passphrase = optarg; |
log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); |
| break; |
|
| |
|
| case 'C': |
argv += optind; |
| identity_comment = optarg; |
argc -= optind; |
| break; |
|
| |
|
| case 'q': |
if (sign_op != NULL) { |
| quiet = 1; |
if (strncmp(sign_op, "find-principals", 15) == 0) { |
| break; |
if (ca_key_path == NULL) { |
| |
error("Too few arguments for find-principals:" |
| |
"missing signature file"); |
| |
exit(1); |
| |
} |
| |
if (!have_identity) { |
| |
error("Too few arguments for find-principals:" |
| |
"missing allowed keys file"); |
| |
exit(1); |
| |
} |
| |
return sig_find_principals(ca_key_path, identity_file, |
| |
opts, nopts); |
| |
} else if (strncmp(sign_op, "match-principals", 16) == 0) { |
| |
if (!have_identity) { |
| |
error("Too few arguments for match-principals:" |
| |
"missing allowed keys file"); |
| |
exit(1); |
| |
} |
| |
if (cert_key_id == NULL) { |
| |
error("Too few arguments for match-principals: " |
| |
"missing principal ID"); |
| |
exit(1); |
| |
} |
| |
return sig_match_principals(identity_file, cert_key_id, |
| |
opts, nopts); |
| |
} else if (strncmp(sign_op, "sign", 4) == 0) { |
| |
/* NB. cert_principals is actually namespace, via -n */ |
| |
if (cert_principals == NULL || |
| |
*cert_principals == '\0') { |
| |
error("Too few arguments for sign: " |
| |
"missing namespace"); |
| |
exit(1); |
| |
} |
| |
if (!have_identity) { |
| |
error("Too few arguments for sign: " |
| |
"missing key"); |
| |
exit(1); |
| |
} |
| |
return sig_sign(identity_file, cert_principals, |
| |
prefer_agent, argc, argv, opts, nopts); |
| |
} else if (strncmp(sign_op, "check-novalidate", 16) == 0) { |
| |
/* NB. cert_principals is actually namespace, via -n */ |
| |
if (cert_principals == NULL || |
| |
*cert_principals == '\0') { |
| |
error("Too few arguments for check-novalidate: " |
| |
"missing namespace"); |
| |
exit(1); |
| |
} |
| |
if (ca_key_path == NULL) { |
| |
error("Too few arguments for check-novalidate: " |
| |
"missing signature file"); |
| |
exit(1); |
| |
} |
| |
return sig_verify(ca_key_path, cert_principals, |
| |
NULL, NULL, NULL, opts, nopts); |
| |
} else if (strncmp(sign_op, "verify", 6) == 0) { |
| |
/* NB. cert_principals is actually namespace, via -n */ |
| |
if (cert_principals == NULL || |
| |
*cert_principals == '\0') { |
| |
error("Too few arguments for verify: " |
| |
"missing namespace"); |
| |
exit(1); |
| |
} |
| |
if (ca_key_path == NULL) { |
| |
error("Too few arguments for verify: " |
| |
"missing signature file"); |
| |
exit(1); |
| |
} |
| |
if (!have_identity) { |
| |
error("Too few arguments for sign: " |
| |
"missing allowed keys file"); |
| |
exit(1); |
| |
} |
| |
if (cert_key_id == NULL) { |
| |
error("Too few arguments for verify: " |
| |
"missing principal identity"); |
| |
exit(1); |
| |
} |
| |
return sig_verify(ca_key_path, cert_principals, |
| |
cert_key_id, identity_file, rr_hostname, |
| |
opts, nopts); |
| |
} |
| |
error("Unsupported operation for -Y: \"%s\"", sign_op); |
| |
usage(); |
| |
/* NOTREACHED */ |
| |
} |
| |
|
| case '?': |
if (ca_key_path != NULL) { |
| default: |
if (argc < 1 && !gen_krl) { |
| usage(); |
error("Too few arguments."); |
| |
usage(); |
| |
} |
| |
} else if (argc > 0 && !gen_krl && !check_krl && |
| |
!do_gen_candidates && !do_screen_candidates) { |
| |
error("Too many arguments."); |
| |
usage(); |
| } |
} |
| } |
if (change_passphrase && change_comment) { |
| if (optind < ac) |
error("Can only have one of -p and -c."); |
| { |
usage(); |
| printf("Too many arguments.\n"); |
} |
| usage(); |
if (print_fingerprint && (delete_host || hash_hosts)) { |
| } |
error("Cannot use -l with -H or -R."); |
| if (change_passphrase && change_comment) |
usage(); |
| { |
} |
| printf("Can only have one of -p and -c.\n"); |
if (gen_krl) { |
| usage(); |
do_gen_krl(pw, update_krl, ca_key_path, |
| } |
cert_serial, identity_comment, argc, argv); |
| |
return (0); |
| |
} |
| |
if (check_krl) { |
| |
do_check_krl(pw, print_fingerprint, argc, argv); |
| |
return (0); |
| |
} |
| |
if (ca_key_path != NULL) { |
| |
if (cert_key_id == NULL) |
| |
fatal("Must specify key id (-I) when certifying"); |
| |
for (i = 0; i < nopts; i++) |
| |
add_cert_option(opts[i]); |
| |
do_ca_sign(pw, ca_key_path, prefer_agent, |
| |
cert_serial, cert_serial_autoinc, argc, argv); |
| |
} |
| |
if (show_cert) |
| |
do_show_cert(pw); |
| |
if (delete_host || hash_hosts || find_host) { |
| |
do_known_hosts(pw, rr_hostname, find_host, |
| |
delete_host, hash_hosts); |
| |
} |
| |
if (pkcs11provider != NULL) |
| |
do_download(pw); |
| |
if (download_sk) { |
| |
for (i = 0; i < nopts; i++) { |
| |
if (strncasecmp(opts[i], "device=", 7) == 0) { |
| |
sk_device = xstrdup(opts[i] + 7); |
| |
} else { |
| |
fatal("Option \"%s\" is unsupported for " |
| |
"FIDO authenticator download", opts[i]); |
| |
} |
| |
} |
| |
return do_download_sk(sk_provider, sk_device); |
| |
} |
| |
if (print_fingerprint || print_bubblebabble) |
| |
do_fingerprint(pw); |
| |
if (change_passphrase) |
| |
do_change_passphrase(pw); |
| |
if (change_comment) |
| |
do_change_comment(pw, identity_comment); |
| |
#ifdef WITH_OPENSSL |
| |
if (convert_to) |
| |
do_convert_to(pw); |
| |
if (convert_from) |
| |
do_convert_from(pw); |
| |
#else /* WITH_OPENSSL */ |
| |
if (convert_to || convert_from) |
| |
fatal("key conversion disabled at compile time"); |
| |
#endif /* WITH_OPENSSL */ |
| |
if (print_public) |
| |
do_print_public(pw); |
| |
if (rr_hostname != NULL) { |
| |
unsigned int n = 0; |
| |
|
| if (print_fingerprint) |
if (have_identity) { |
| do_fingerprint(pw); |
n = do_print_resource_record(pw, identity_file, |
| |
rr_hostname, print_generic, opts, nopts); |
| |
if (n == 0) |
| |
fatal("%s: %s", identity_file, strerror(errno)); |
| |
exit(0); |
| |
} else { |
| |
|
| /* If the user requested to change the passphrase, do it now. This |
n += do_print_resource_record(pw, |
| function never returns. */ |
_PATH_HOST_RSA_KEY_FILE, rr_hostname, |
| if (change_passphrase) |
print_generic, opts, nopts); |
| do_change_passphrase(pw); |
n += do_print_resource_record(pw, |
| |
_PATH_HOST_DSA_KEY_FILE, rr_hostname, |
| |
print_generic, opts, nopts); |
| |
n += do_print_resource_record(pw, |
| |
_PATH_HOST_ECDSA_KEY_FILE, rr_hostname, |
| |
print_generic, opts, nopts); |
| |
n += do_print_resource_record(pw, |
| |
_PATH_HOST_ED25519_KEY_FILE, rr_hostname, |
| |
print_generic, opts, nopts); |
| |
n += do_print_resource_record(pw, |
| |
_PATH_HOST_XMSS_KEY_FILE, rr_hostname, |
| |
print_generic, opts, nopts); |
| |
if (n == 0) |
| |
fatal("no keys found."); |
| |
exit(0); |
| |
} |
| |
} |
| |
|
| /* If the user requested to change the comment, do it now. This function |
if (do_gen_candidates || do_screen_candidates) { |
| never returns. */ |
if (argc <= 0) |
| if (change_comment) |
fatal("No output file specified"); |
| do_change_comment(pw); |
else if (argc > 1) |
| |
fatal("Too many output files specified"); |
| |
} |
| |
if (do_gen_candidates) { |
| |
do_moduli_gen(argv[0], opts, nopts); |
| |
return 0; |
| |
} |
| |
if (do_screen_candidates) { |
| |
do_moduli_screen(argv[0], opts, nopts); |
| |
return 0; |
| |
} |
| |
|
| arc4random_stir(); |
if (gen_all_hostkeys) { |
| |
do_gen_all_hostkeys(pw); |
| |
return (0); |
| |
} |
| |
|
| if (quiet) |
if (key_type_name == NULL) |
| rsa_set_verbose(0); |
key_type_name = DEFAULT_KEY_TYPE_NAME; |
| |
|
| /* Generate the rsa key pair. */ |
type = sshkey_type_from_name(key_type_name); |
| private_key = RSA_new(); |
type_bits_valid(type, key_type_name, &bits); |
| public_key = RSA_new(); |
|
| rsa_generate_key(private_key, public_key, bits); |
|
| |
|
| if (!have_identity) |
if (!quiet) |
| ask_filename(pw, "Enter file in which to save the key"); |
printf("Generating public/private %s key pair.\n", |
| |
key_type_name); |
| |
switch (type) { |
| |
case KEY_ECDSA_SK: |
| |
case KEY_ED25519_SK: |
| |
for (i = 0; i < nopts; i++) { |
| |
if (strcasecmp(opts[i], "no-touch-required") == 0) { |
| |
sk_flags &= ~SSH_SK_USER_PRESENCE_REQD; |
| |
} else if (strcasecmp(opts[i], "verify-required") == 0) { |
| |
sk_flags |= SSH_SK_USER_VERIFICATION_REQD; |
| |
} else if (strcasecmp(opts[i], "resident") == 0) { |
| |
sk_flags |= SSH_SK_RESIDENT_KEY; |
| |
} else if (strncasecmp(opts[i], "device=", 7) == 0) { |
| |
sk_device = xstrdup(opts[i] + 7); |
| |
} else if (strncasecmp(opts[i], "user=", 5) == 0) { |
| |
sk_user = xstrdup(opts[i] + 5); |
| |
} else if (strncasecmp(opts[i], "challenge=", 10) == 0) { |
| |
if ((r = sshbuf_load_file(opts[i] + 10, |
| |
&challenge)) != 0) { |
| |
fatal_r(r, "Unable to load FIDO " |
| |
"enrollment challenge \"%s\"", |
| |
opts[i] + 10); |
| |
} |
| |
} else if (strncasecmp(opts[i], |
| |
"write-attestation=", 18) == 0) { |
| |
sk_attestation_path = opts[i] + 18; |
| |
} else if (strncasecmp(opts[i], |
| |
"application=", 12) == 0) { |
| |
sk_application = xstrdup(opts[i] + 12); |
| |
if (strncmp(sk_application, "ssh:", 4) != 0) { |
| |
fatal("FIDO application string must " |
| |
"begin with \"ssh:\""); |
| |
} |
| |
} else { |
| |
fatal("Option \"%s\" is unsupported for " |
| |
"FIDO authenticator enrollment", opts[i]); |
| |
} |
| |
} |
| |
if ((attest = sshbuf_new()) == NULL) |
| |
fatal("sshbuf_new failed"); |
| |
r = 0; |
| |
for (i = 0 ;;) { |
| |
if (!quiet) { |
| |
printf("You may need to touch your " |
| |
"authenticator%s to authorize key " |
| |
"generation.\n", |
| |
r == 0 ? "" : " again"); |
| |
} |
| |
fflush(stdout); |
| |
r = sshsk_enroll(type, sk_provider, sk_device, |
| |
sk_application == NULL ? "ssh:" : sk_application, |
| |
sk_user, sk_flags, passphrase, challenge, |
| |
&private, attest); |
| |
if (r == 0) |
| |
break; |
| |
if (r == SSH_ERR_KEY_BAD_PERMISSIONS && |
| |
(sk_flags & SSH_SK_RESIDENT_KEY) != 0 && |
| |
(sk_flags & SSH_SK_FORCE_OPERATION) == 0 && |
| |
confirm_sk_overwrite(sk_application, sk_user)) { |
| |
sk_flags |= SSH_SK_FORCE_OPERATION; |
| |
continue; |
| |
} |
| |
if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) |
| |
fatal_r(r, "Key enrollment failed"); |
| |
else if (passphrase != NULL) { |
| |
error("PIN incorrect"); |
| |
freezero(passphrase, strlen(passphrase)); |
| |
passphrase = NULL; |
| |
} |
| |
if (++i >= 3) |
| |
fatal("Too many incorrect PINs"); |
| |
passphrase = read_passphrase("Enter PIN for " |
| |
"authenticator: ", RP_ALLOW_STDIN); |
| |
} |
| |
if (passphrase != NULL) { |
| |
freezero(passphrase, strlen(passphrase)); |
| |
passphrase = NULL; |
| |
} |
| |
break; |
| |
default: |
| |
if ((r = sshkey_generate(type, bits, &private)) != 0) |
| |
fatal("sshkey_generate failed"); |
| |
break; |
| |
} |
| |
if ((r = sshkey_from_private(private, &public)) != 0) |
| |
fatal_r(r, "sshkey_from_private"); |
| |
|
| /* Create ~/.ssh directory if it doesn\'t already exist. */ |
if (!have_identity) |
| snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, SSH_USER_DIR); |
ask_filename(pw, "Enter file in which to save the key"); |
| if (strstr(identity_file, dotsshdir) != NULL && |
|
| stat(dotsshdir, &st) < 0) { |
|
| if (mkdir(dotsshdir, 0755) < 0) |
|
| error("Could not create directory '%s'.", dotsshdir); |
|
| else if(!quiet) |
|
| printf("Created directory '%s'.\n", dotsshdir); |
|
| } |
|
| |
|
| /* If the file already exists, ask the user to confirm. */ |
/* Create ~/.ssh directory if it doesn't already exist. */ |
| if (stat(identity_file, &st) >= 0) |
hostfile_create_user_ssh_dir(identity_file, !quiet); |
| { |
|
| char yesno[3]; |
|
| printf("%s already exists.\n", identity_file); |
|
| printf("Overwrite (y/n)? "); |
|
| fflush(stdout); |
|
| if (fgets(yesno, sizeof(yesno), stdin) == NULL) |
|
| exit(1); |
|
| if (yesno[0] != 'y' && yesno[0] != 'Y') |
|
| exit(1); |
|
| } |
|
| |
|
| /* Ask for a passphrase (twice). */ |
|
| if (identity_passphrase) |
|
| passphrase1 = xstrdup(identity_passphrase); |
|
| else |
|
| if (identity_new_passphrase) |
|
| passphrase1 = xstrdup(identity_new_passphrase); |
|
| else |
|
| { |
|
| passphrase_again: |
|
| passphrase1 = |
|
| read_passphrase("Enter passphrase (empty for no passphrase): ", 1); |
|
| passphrase2 = read_passphrase("Enter same passphrase again: ", 1); |
|
| if (strcmp(passphrase1, passphrase2) != 0) |
|
| { |
|
| /* The passphrases do not match. Clear them and retry. */ |
|
| memset(passphrase1, 0, strlen(passphrase1)); |
|
| memset(passphrase2, 0, strlen(passphrase2)); |
|
| xfree(passphrase1); |
|
| xfree(passphrase2); |
|
| printf("Passphrases do not match. Try again.\n"); |
|
| goto passphrase_again; |
|
| } |
|
| /* Clear the other copy of the passphrase. */ |
|
| memset(passphrase2, 0, strlen(passphrase2)); |
|
| xfree(passphrase2); |
|
| } |
|
| |
|
| /* Create default commend field for the passphrase. The user can later |
/* If the file already exists, ask the user to confirm. */ |
| edit this field. */ |
if (!confirm_overwrite(identity_file)) |
| if (identity_comment) |
exit(1); |
| { |
|
| strlcpy(comment, identity_comment, sizeof(comment)); |
/* Determine the passphrase for the private key */ |
| } |
passphrase = private_key_passphrase(); |
| else |
if (identity_comment) { |
| { |
strlcpy(comment, identity_comment, sizeof(comment)); |
| if (gethostname(hostname, sizeof(hostname)) < 0) |
} else { |
| { |
/* Create default comment field for the passphrase. */ |
| perror("gethostname"); |
snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
| exit(1); |
|
| } |
} |
| snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
|
| } |
|
| |
|
| /* Save the key with the given passphrase and comment. */ |
/* Save the key with the given passphrase and comment. */ |
| if (!save_private_key(identity_file, passphrase1, private_key, comment)) |
if ((r = sshkey_save_private(private, identity_file, passphrase, |
| { |
comment, private_key_format, openssh_format_cipher, rounds)) != 0) { |
| printf("Saving the key failed: %s: %s.\n", |
error_r(r, "Saving key \"%s\" failed", identity_file); |
| identity_file, strerror(errno)); |
freezero(passphrase, strlen(passphrase)); |
| memset(passphrase1, 0, strlen(passphrase1)); |
exit(1); |
| xfree(passphrase1); |
} |
| exit(1); |
freezero(passphrase, strlen(passphrase)); |
| } |
sshkey_free(private); |
| /* Clear the passphrase. */ |
|
| memset(passphrase1, 0, strlen(passphrase1)); |
|
| xfree(passphrase1); |
|
| |
|
| /* Clear the private key and the random number generator. */ |
if (!quiet) { |
| RSA_free(private_key); |
printf("Your identification has been saved in %s\n", |
| arc4random_stir(); |
identity_file); |
| |
} |
| |
|
| if (!quiet) |
strlcat(identity_file, ".pub", sizeof(identity_file)); |
| printf("Your identification has been saved in %s.\n", identity_file); |
if ((r = sshkey_save_public(public, identity_file, comment)) != 0) |
| |
fatal_r(r, "Unable to save public key to %s", identity_file); |
| |
|
| /* Save the public key in text format in a file with the same name but |
if (!quiet) { |
| .pub appended. */ |
fp = sshkey_fingerprint(public, fingerprint_hash, |
| strlcat(identity_file, ".pub", sizeof(identity_file)); |
SSH_FP_DEFAULT); |
| f = fopen(identity_file, "w"); |
ra = sshkey_fingerprint(public, fingerprint_hash, |
| if (!f) |
SSH_FP_RANDOMART); |
| { |
if (fp == NULL || ra == NULL) |
| printf("Could not save your public key in %s\n", identity_file); |
fatal("sshkey_fingerprint failed"); |
| exit(1); |
printf("Your public key has been saved in %s\n", |
| } |
identity_file); |
| fprintf(f, "%d ", BN_num_bits(public_key->n)); |
printf("The key fingerprint is:\n"); |
| tmpbuf = BN_bn2dec(public_key->e); |
printf("%s %s\n", fp, comment); |
| fprintf(f, "%s ", tmpbuf); |
printf("The key's randomart image is:\n"); |
| free(tmpbuf); |
printf("%s\n", ra); |
| tmpbuf = BN_bn2dec(public_key->n); |
free(ra); |
| fprintf(f, "%s %s\n", tmpbuf, comment); |
free(fp); |
| free(tmpbuf); |
} |
| fclose(f); |
|
| |
|
| if (!quiet) { |
if (sk_attestation_path != NULL) |
| printf("Your public key has been saved in %s.\n", identity_file); |
save_attestation(attest, sk_attestation_path); |
| printf("The key fingerprint is:\n"); |
|
| printf("%d %s %s\n", BN_num_bits(public_key->n), |
sshbuf_free(attest); |
| fingerprint(public_key->e, public_key->n), |
sshkey_free(public); |
| comment); |
|
| } |
exit(0); |
| |
|
| exit(0); |
|
| } |
} |
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