src/usr.bin/ssh/ssh-keygen.c - diff

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Diff for /src/usr.bin/ssh/ssh-keygen.c between version 1.362 and 1.447

version 1.362, 2019/11/12 19:33:08

version 1.447, 2022/01/05 21:54:37

Line 26

#include <fcntl.h>

#include <netdb.h>

#include <pwd.h>

#include <stdarg.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

Line 54

Line 55

#include "sshsig.h"

#include "ssh-sk.h"

#include "sk-api.h" /* XXX for SSH_SK_USER_PRESENCE_REQD; remove */

#include "cipher.h"

#ifdef ENABLE_PKCS11

#include "ssh-pkcs11.h"

Line 113

Line 115

static u_int64_t cert_valid_to = ~0ULL;

/* Certificate options */

#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_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \

CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)

static u_int32_t certflags_flags = CERTOPT_DEFAULT;

Line 125

Line 128

static char *certflags_src_addr = NULL;

/* Arbitrary extensions specified by user */

struct cert_userext {

struct cert_ext {

char *key;

char *val;

int crit;

};

static struct cert_userext *cert_userext;

static struct cert_ext *cert_ext;

static size_t ncert_userext;

static size_t ncert_ext;

/* Conversion to/from various formats */

enum {

Line 154

Line 157

/* Cipher for new-format private keys */

static char *openssh_format_cipher = NULL;

/* Number of KDF rounds to derive new format keys. */

* Number of KDF rounds to derive new format keys /

* number of primality trials when screening moduli.

static int rounds = 0;

/* argv0 */

Line 179

fatal("unknown key type %s", key_type_name);

if (*bitsp == 0) {

#ifdef WITH_OPENSSL

u_int nid;

int nid;

switch(type) {

case KEY_DSA:

Line 310

if ((r = sshkey_load_private(filename, "", &prv, commentp)) == 0)

return prv;

if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)

fatal("Load key \"%s\": %s", filename, ssh_err(r));

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);

explicit_bzero(pass, strlen(pass));

freezero(pass, strlen(pass));

free(pass);

if (r != 0)

fatal("Load key \"%s\": %s", filename, ssh_err(r));

fatal_r(r, "Load key \"%s\"", filename);

return prv;

}

Line 337

Line 336

int r;

if ((b = sshbuf_new()) == NULL)

fatal("%s: sshbuf_new failed", __func__);

fatal_f("sshbuf_new failed");

if ((r = sshkey_putb(k, b)) != 0)

fatal("key_to_blob failed: %s", ssh_err(r));

fatal_fr(r, "put key");

if ((b64 = sshbuf_dtob64_string(b, 1)) == NULL)

fatal("%s: sshbuf_dtob64_string failed", __func__);

fatal_f("sshbuf_dtob64_string failed");

/* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */

snprintf(comment, sizeof(comment),

Line 376

Line 375

fatal("PEM_write_EC_PUBKEY failed");

break;

default:

fatal("%s: unsupported key type %s", __func__, sshkey_type(k));

fatal_f("unsupported key type %s", sshkey_type(k));

}

exit(0);

}

Line 389

Line 388

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("%s: unsupported key type %s", __func__, sshkey_type(k));

fatal_f("unsupported key type %s", sshkey_type(k));

}

exit(0);

}

Line 419

Line 426

do_convert_to_pem(k);

break;

default:

fatal("%s: unknown key format %d", __func__, convert_format);

fatal_f("unknown key format %d", convert_format);

}

exit(0);

}

Line 435

Line 442

int r;

if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0)

fatal("%s: buffer error: %s", __func__, ssh_err(r));

fatal_fr(r, "parse");

bytes = (bignum_bits + 7) / 8;

if (sshbuf_len(b) < bytes)

fatal("%s: input buffer too small: need %d have %zu",

fatal_f("input buffer too small: need %d have %zu",

__func__, bytes, sshbuf_len(b));

bytes, sshbuf_len(b));

if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL)

fatal("%s: BN_bin2bn failed", __func__);

fatal_f("BN_bin2bn failed");

if ((r = sshbuf_consume(b, bytes)) != 0)

fatal("%s: buffer error: %s", __func__, ssh_err(r));

fatal_fr(r, "consume");

}

static struct sshkey *

Line 462

Line 469

BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL;

if ((r = sshbuf_get_u32(b, &magic)) != 0)

fatal("%s: buffer error: %s", __func__, ssh_err(r));

fatal_fr(r, "parse magic");

if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {

error("bad magic 0x%x != 0x%x", magic,

Line 475

Line 482

(r = sshbuf_get_u32(b, &i2)) != 0 ||

(r = sshbuf_get_u32(b, &i3)) != 0 ||

(r = sshbuf_get_u32(b, &i4)) != 0)

fatal("%s: buffer error: %s", __func__, ssh_err(r));

fatal_fr(r, "parse");

debug("ignore (%d %d %d %d)", i1, i2, i3, i4);

if (strcmp(cipher, "none") != 0) {

error("unsupported cipher %s", cipher);

Line 504

Line 511

(dsa_g = BN_new()) == NULL ||

(dsa_pub_key = BN_new()) == NULL ||

(dsa_priv_key = BN_new()) == NULL)

fatal("%s: BN_new", __func__);

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("%s: DSA_set0_pqg failed", __func__);

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("%s: DSA_set0_key failed", __func__);

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("%s: buffer error: %s", __func__, ssh_err(r));

fatal_fr(r, "parse RSA");

e = e1;

debug("e %lx", e);

if (e < 30) {

Line 533

Line 540

debug("e %lx", e);

}

if ((rsa_e = BN_new()) == NULL)

fatal("%s: BN_new", __func__);

fatal_f("BN_new");

if (!BN_set_word(rsa_e, e)) {

BN_clear_free(rsa_e);

sshkey_free(key);

Line 544

Line 551

(rsa_p = BN_new()) == NULL ||

(rsa_q = BN_new()) == NULL ||

(rsa_iqmp = BN_new()) == NULL)

fatal("%s: BN_new", __func__);

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("%s: RSA_set0_key failed", __func__);

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("%s: RSA_set0_factors failed", __func__);

fatal_f("RSA_set0_factors failed");

rsa_p = rsa_q = NULL; /* transferred */

if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0)

fatal("generate RSA parameters failed: %s", ssh_err(r));

fatal_fr(r, "generate RSA parameters");

BN_clear_free(rsa_iqmp);

break;

}

rlen = sshbuf_len(b);

if (rlen != 0)

error("%s: remaining bytes in key blob %d", __func__, rlen);

error_f("remaining bytes in key blob %d", rlen);

/* try the key */

if (sshkey_sign(key, &sig, &slen, data, sizeof(data),

NULL, NULL, 0) != 0 ||

NULL, NULL, NULL, 0) != 0 ||

sshkey_verify(key, sig, slen, data, sizeof(data),

NULL, 0) != 0) {

NULL, 0, NULL) != 0) {

sshkey_free(key);

free(sig);

return NULL;

Line 646

Line 653

(encoded[len-3] == '='))

encoded[len-3] = '\0';

if ((r = sshbuf_b64tod(buf, encoded)) != 0)

fatal("%s: base64 decoding failed: %s", __func__, ssh_err(r));

fatal_fr(r, "base64 decode");

if (*private)

if (*private) {

*k = do_convert_private_ssh2(buf);

if ((*k = do_convert_private_ssh2(buf)) == NULL)

else if ((r = sshkey_fromb(buf, k)) != 0)

fatal_f("private key conversion failed");

fatal("decode blob failed: %s", ssh_err(r));

} else if ((r = sshkey_fromb(buf, k)) != 0)

fatal_fr(r, "parse key");

sshbuf_free(buf);

fclose(fp);

}

Line 664

Line 672

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("%s: %s is not a recognised public key format", __func__,

fatal_f("%s is not a recognised public key format",

identity_file);

}

fclose(fp);

Line 689

Line 697

(*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa);

break;

default:

fatal("%s: unsupported pubkey type %d", __func__,

fatal_f("unsupported pubkey type %d",

EVP_PKEY_base_id(pubkey));

}

EVP_PKEY_free(pubkey);

Line 712

Line 720

fclose(fp);

return;

}

fatal("%s: unrecognised raw private key format", __func__);

fatal_f("unrecognised raw private key format");

}

static void

Line 738

Line 746

do_convert_from_pem(&k, &private);

break;

default:

fatal("%s: unknown key format %d", __func__, convert_format);

fatal_f("unknown key format %d", convert_format);

}

if (!private) {

Line 761

Line 769

NULL, 0, NULL, NULL);

break;

default:

fatal("%s: unsupported key type %s", __func__,

fatal_f("unsupported key type %s", sshkey_type(k));

sshkey_type(k));

}

Line 787

Line 794

fatal("%s: %s", identity_file, strerror(errno));

prv = load_identity(identity_file, &comment);

if ((r = sshkey_write(prv, stdout)) != 0)

error("sshkey_write failed: %s", ssh_err(r));

fatal_fr(r, "write key");

sshkey_free(prv);

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);

}

Line 804

Line 815

int i, nkeys;

enum sshkey_fp_rep rep;

int fptype;

char *fp, *ra;

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);

nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys, &comments);

if (nkeys <= 0)

fatal("cannot read public key from pkcs11");

for (i = 0; i < nkeys; i++) {

Line 819

Line 830

ra = sshkey_fingerprint(keys[i], fingerprint_hash,

SSH_FP_RANDOMART);

if (fp == NULL || ra == NULL)

fatal("%s: sshkey_fingerprint fail", __func__);

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)

Line 828

Line 839

free(fp);

} else {

(void) sshkey_write(keys[i], stdout); /* XXX check */

fprintf(stdout, "\n");

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);

Line 867

Line 881

fp = sshkey_fingerprint(public, fptype, rep);

ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART);

if (fp == NULL || ra == NULL)

fatal("%s: sshkey_fingerprint failed", __func__);

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)

Line 881

Line 895

{

struct stat st;

char *comment = NULL;

struct sshkey *public = 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, &public, &comment)) != 0) {

if ((r = sshkey_load_public(path, &pubkey, &comment)) != 0)

debug("load public \"%s\": %s", path, ssh_err(r));

debug_r(r, "load public \"%s\"", path);

if (pubkey == NULL || comment == NULL || *comment == '\0') {

free(comment);

if ((r = sshkey_load_private(path, NULL,

&public, &comment)) != 0) {

&privkey, &comment)) != 0)

debug("load private \"%s\": %s", path, ssh_err(r));

debug_r(r, "load private \"%s\"", path);

fatal("%s is not a key file.", path);

}

if (pubkey == NULL && privkey == NULL)

fatal("%s is not a key file.", path);

fingerprint_one_key(public, comment);

fingerprint_one_key(pubkey == NULL ? privkey : pubkey, comment);

sshkey_free(public);

sshkey_free(pubkey);

sshkey_free(privkey);

free(comment);

}

Line 1022

Line 1039

struct sshkey *private, *public;

char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file;

int i, type, fd, r;

FILE *f;

for (i = 0; key_types[i].key_type; i++) {

public = private = NULL;

Line 1060

Line 1076

fflush(stdout);

type = sshkey_type_from_name(key_types[i].key_type);

if ((fd = mkstemp(prv_tmp)) == -1) {

error("Could not save your public key in %s: %s",

error("Could not save your private key in %s: %s",

prv_tmp, strerror(errno));

goto failnext;

}

close(fd); /* just using mkstemp() to generate/reserve a name */

(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("sshkey_generate failed: %s", ssh_err(r));

error_r(r, "sshkey_generate failed");

goto failnext;

}

if ((r = sshkey_from_private(private, &public)) != 0)

fatal("sshkey_from_private failed: %s", ssh_err(r));

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("Saving key \"%s\" failed: %s",

error_r(r, "Saving key \"%s\" failed", prv_tmp);

prv_tmp, ssh_err(r));

goto failnext;

}

if ((fd = mkstemp(pub_tmp)) == -1) {

Line 1088

Line 1103

goto failnext;

}

(void)fchmod(fd, 0644);

f = fdopen(fd, "w");

(void)close(fd);

if (f == NULL) {

if ((r = sshkey_save_public(public, pub_tmp, comment)) != 0) {

error("fdopen %s failed: %s", pub_tmp, strerror(errno));

error_r(r, "Unable to save public key to %s",

close(fd);

identity_file);

goto failnext;

}

if ((r = sshkey_write(public, f)) != 0) {

error("write key failed: %s", ssh_err(r));

fclose(f);

goto failnext;

}

fprintf(f, " %s\n", comment);

if (ferror(f) != 0) {

error("write key failed: %s", strerror(errno));

fclose(f);

goto failnext;

}

if (fclose(f) != 0) {

error("key close failed: %s", strerror(errno));

goto failnext;

}

/* Rename temporary files to their permanent locations. */

if (rename(pub_tmp, pub_file) != 0) {

Line 1180

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);

Line 1240

Line 1241

ra = sshkey_fingerprint(l->key,

fingerprint_hash, SSH_FP_RANDOMART);

if (fp == NULL || ra == NULL)

fatal("%s: sshkey_fingerprint failed",

fatal_f("sshkey_fingerprint failed");

__func__);

mprintf("%s %s %s%s%s\n", ctx->host,

mprintf("%s %s %s %s\n", ctx->host,

sshkey_type(l->key), fp,

sshkey_type(l->key), fp, l->comment);

l->comment[0] ? " " : "",

l->comment);

if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)

printf("%s\n", ra);

free(ra);

Line 1271

Line 1273

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);

Line 1280

Line 1283

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;

Line 1306

Line 1311

unlink(tmp);

fatal("fdopen: %s", strerror(oerrno));

}

fchmod(fd, sb.st_mode & 0644);

inplace = 1;

}

/* XXX support identity_file == "-" for stdin */

Line 1313

Line 1319

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) {

foreach_options, 0)) != 0) {

if (inplace)

unlink(tmp);

fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r));

fatal_fr(r, "hostkeys_foreach");

}

if (inplace)

Line 1390

Line 1396

RP_ALLOW_STDIN);

r = sshkey_load_private(identity_file, old_passphrase,

&private, &comment);

explicit_bzero(old_passphrase, strlen(old_passphrase));

freezero(old_passphrase, strlen(old_passphrase));

free(old_passphrase);

if (r != 0)

goto badkey;

} else if (r != 0) {

badkey:

fatal("Failed to load key %s: %s", identity_file, ssh_err(r));

fatal_r(r, "Failed to load key %s", identity_file);

}

if (comment)

mprintf("Key has comment '%s'\n", comment);

Line 1422

Line 1427

exit(1);

}

/* Destroy the other copy. */

explicit_bzero(passphrase2, strlen(passphrase2));

freezero(passphrase2, strlen(passphrase2));

free(passphrase2);

}

/* Save the file using the new passphrase. */

if ((r = sshkey_save_private(private, identity_file, passphrase1,

comment, private_key_format, openssh_format_cipher, rounds)) != 0) {

error("Saving key \"%s\" failed: %s.",

error_r(r, "Saving key \"%s\" failed", identity_file);

identity_file, ssh_err(r));

freezero(passphrase1, strlen(passphrase1));

explicit_bzero(passphrase1, strlen(passphrase1));

free(passphrase1);

sshkey_free(private);

free(comment);

exit(1);

}

/* Destroy the passphrase and the copy of the key in memory. */

explicit_bzero(passphrase1, strlen(passphrase1));

freezero(passphrase1, strlen(passphrase1));

free(passphrase1);

sshkey_free(private); /* Destroys contents */

free(comment);

Line 1460

Line 1461

int r;

if (fname == NULL)

fatal("%s: no filename", __func__);

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("Failed to read v2 public key from \"%s\": %s.",

fatal_r(r, "Failed to read v2 public key from \"%s\"", fname);

fname, ssh_err(r));

export_dns_rr(hname, public, stdout, print_generic);

sshkey_free(public);

free(comment);

Line 1485

struct sshkey *private;

struct sshkey *public;

struct stat st;

FILE *f;

int r;

int r, fd;

if (!have_identity)

ask_filename(pw, "Enter file in which the key is");

Line 1496

Line 1495

&private, &comment)) == 0)

passphrase = xstrdup("");

else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)

fatal("Cannot load private key \"%s\": %s.",

fatal_r(r, "Cannot load private key \"%s\"", identity_file);

identity_file, ssh_err(r));

else {

if (identity_passphrase)

passphrase = xstrdup(identity_passphrase);

Line 1509

Line 1507

/* Try to load using the passphrase. */

if ((r = sshkey_load_private(identity_file, passphrase,

&private, &comment)) != 0) {

explicit_bzero(passphrase, strlen(passphrase));

freezero(passphrase, strlen(passphrase));

free(passphrase);

fatal_r(r, "Cannot load private key \"%s\"",

fatal("Cannot load private key \"%s\": %s.",

identity_file);

identity_file, ssh_err(r));

}

Line 1553

Line 1550

if ((r = sshkey_save_private(private, identity_file, passphrase,

new_comment, private_key_format, openssh_format_cipher,

rounds)) != 0) {

error("Saving key \"%s\" failed: %s",

error_r(r, "Saving key \"%s\" failed", identity_file);

identity_file, ssh_err(r));

freezero(passphrase, strlen(passphrase));

explicit_bzero(passphrase, strlen(passphrase));

free(passphrase);

sshkey_free(private);

free(comment);

exit(1);

}

explicit_bzero(passphrase, strlen(passphrase));

freezero(passphrase, strlen(passphrase));

free(passphrase);

if ((r = sshkey_from_private(private, &public)) != 0)

fatal("sshkey_from_private failed: %s", ssh_err(r));

fatal_fr(r, "sshkey_from_private");

sshkey_free(private);

strlcat(identity_file, ".pub", sizeof(identity_file));

fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);

if ((r = sshkey_save_public(public, identity_file, new_comment)) != 0)

if (fd == -1)

fatal_r(r, "Unable to save public key to %s", identity_file);

fatal("Could not save your public key in %s", identity_file);

f = fdopen(fd, "w");

if (f == NULL)

fatal("fdopen %s failed: %s", identity_file, strerror(errno));

if ((r = sshkey_write(public, f)) != 0)

fatal("write key failed: %s", ssh_err(r));

sshkey_free(public);

fprintf(f, " %s\n", new_comment);

fclose(f);

free(comment);

if (strlen(new_comment) > 0)

Line 1591

Line 1576

}

static void

add_flag_option(struct sshbuf *c, const char *name)

cert_ext_add(const char *key, const char *value, int iscrit)

{

int r;

cert_ext = xreallocarray(cert_ext, ncert_ext + 1, sizeof(*cert_ext));

cert_ext[ncert_ext].key = xstrdup(key);

debug3("%s: %s", __func__, name);

cert_ext[ncert_ext].val = value == NULL ? NULL : xstrdup(value);

if ((r = sshbuf_put_cstring(c, name)) != 0 ||

cert_ext[ncert_ext].crit = iscrit;

(r = sshbuf_put_string(c, NULL, 0)) != 0)

ncert_ext++;

fatal("%s: buffer error: %s", __func__, ssh_err(r));

}

static void

/* qsort(3) comparison function for certificate extensions */

add_string_option(struct sshbuf *c, const char *name, const char *value)

static int

cert_ext_cmp(const void *_a, const void *_b)

{

struct sshbuf *b;

const struct cert_ext *a = (const struct cert_ext *)_a;

const struct cert_ext *b = (const struct cert_ext *)_b;

int r;

debug3("%s: %s=%s", __func__, name, value);

if (a->crit != b->crit)

if ((b = sshbuf_new()) == NULL)

return (a->crit < b->crit) ? -1 : 1;

fatal("%s: sshbuf_new failed", __func__);

if ((r = strcmp(a->key, b->key)) != 0)

if ((r = sshbuf_put_cstring(b, value)) != 0 ||

return r;

(r = sshbuf_put_cstring(c, name)) != 0 ||

if ((a->val == NULL) != (b->val == NULL))

(r = sshbuf_put_stringb(c, b)) != 0)

return (a->val == NULL) ? -1 : 1;

fatal("%s: buffer error: %s", __func__, ssh_err(r));

if (a->val != NULL && (r = strcmp(a->val, b->val)) != 0)

return r;

sshbuf_free(b);

return 0;

}

#define OPTIONS_CRITICAL 1

Line 1623

Line 1609

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);

if ((which & OPTIONS_CRITICAL) != 0 &&

for (i = 0; i < ncert_ext; i++) {

certflags_command != NULL)

ext = &cert_ext[i];

add_string_option(c, "force-command", certflags_command);

if ((ext->crit && (which & OPTIONS_EXTENSIONS)) ||

if ((which & OPTIONS_EXTENSIONS) != 0 &&

(!ext->crit && (which & OPTIONS_CRITICAL)))

(certflags_flags & CERTOPT_X_FWD) != 0)

add_flag_option(c, "permit-X11-forwarding");

if ((which & OPTIONS_EXTENSIONS) != 0 &&

(certflags_flags & CERTOPT_AGENT_FWD) != 0)

add_flag_option(c, "permit-agent-forwarding");

if ((which & OPTIONS_EXTENSIONS) != 0 &&

(certflags_flags & CERTOPT_PORT_FWD) != 0)

add_flag_option(c, "permit-port-forwarding");

if ((which & OPTIONS_EXTENSIONS) != 0 &&

(certflags_flags & CERTOPT_PTY) != 0)

add_flag_option(c, "permit-pty");

if ((which & OPTIONS_EXTENSIONS) != 0 &&

(certflags_flags & CERTOPT_USER_RC) != 0)

add_flag_option(c, "permit-user-rc");

if ((which & OPTIONS_CRITICAL) != 0 &&

certflags_src_addr != NULL)

add_string_option(c, "source-address", certflags_src_addr);

for (i = 0; i < ncert_userext; i++) {

if ((cert_userext[i].crit && (which & OPTIONS_EXTENSIONS)) ||

(!cert_userext[i].crit && (which & OPTIONS_CRITICAL)))

continue;

if (cert_userext[i].val == NULL)

if (ext->val == NULL) {

add_flag_option(c, cert_userext[i].key);

/* flag option */

else {

debug3_f("%s", ext->key);

add_string_option(c, cert_userext[i].key,

if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||

cert_userext[i].val);

(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);

/* 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)

{

Line 1668

Line 1675

int r, i, nkeys;

if ((r = sshkey_load_public(path, &public, NULL)) != 0)

fatal("Couldn't load CA public key \"%s\": %s",

fatal_r(r, "Couldn't load CA public key \"%s\"", path);

path, ssh_err(r));

nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys);

nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase,

debug3("%s: %d keys", __func__, nkeys);

&keys, NULL);

debug3_f("%d keys", nkeys);

if (nkeys <= 0)

fatal("cannot read public key from pkcs11");

for (i = 0; i < nkeys; i++) {

Line 1694

Line 1701

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, u_int compat, void *ctx)

const char *alg, const char *provider, const char *pin,

u_int compat, void *ctx)

{

int *agent_fdp = (int *)ctx;

Line 1707

Line 1715

unsigned long long cert_serial, int cert_serial_autoinc,

int argc, char **argv)

{

int r, i, fd, found, agent_fd = -1;

int r, i, found, agent_fd = -1;

u_int n;

struct sshkey *ca, *public;

char valid[64], *otmp, *tmp, *cp, *out, *comment, **plist = NULL;

char valid[64], *otmp, *tmp, *cp, *out, *comment;

FILE *f;

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);

Line 1730

Line 1739

* agent.

if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)

fatal("Cannot load CA public key %s: %s",

fatal_r(r, "Cannot load CA public key %s", tmp);

tmp, ssh_err(r));

if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)

fatal("Cannot use public key for CA signature: %s",

fatal_r(r, "Cannot use public key for CA signature");

ssh_err(r));

if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0)

fatal("Retrieve agent key list: %s", ssh_err(r));

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])) {

Line 1751

Line 1758

} 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 (key_type_name != NULL) {

sshkey_type_from_name(key_type_name) != ca->type) {

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;

Line 1778

Line 1797

tmp = tilde_expand_filename(argv[i], pw->pw_uid);

if ((r = sshkey_load_public(tmp, &public, &comment)) != 0)

fatal("%s: unable to open \"%s\": %s",

fatal_r(r, "load pubkey \"%s\"", tmp);

__func__, tmp, ssh_err(r));

if (sshkey_is_cert(public))

if (public->type != KEY_RSA && public->type != KEY_DSA &&

fatal_f("key \"%s\" type %s cannot be certified",

public->type != KEY_ECDSA && public->type != KEY_ED25519 &&

tmp, sshkey_type(public));

public->type != KEY_XMSS)

fatal("%s: key \"%s\" type %s cannot be certified",

__func__, tmp, sshkey_type(public));

/* Prepare certificate to sign */

if ((r = sshkey_to_certified(public)) != 0)

fatal("Could not upgrade key %s to certificate: %s",

fatal_r(r, "Could not upgrade key %s to certificate", tmp);

tmp, ssh_err(r));

public->cert->type = cert_key_type;

public->cert->serial = (u_int64_t)cert_serial;

public->cert->key_id = xstrdup(cert_key_id);

Line 1802

Line 1817

OPTIONS_EXTENSIONS);

if ((r = sshkey_from_private(ca,

&public->cert->signature_key)) != 0)

fatal("sshkey_from_private (ca key): %s", ssh_err(r));

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, agent_signer,

key_type_name, sk_provider, NULL, agent_signer,

&agent_fd)) != 0)

fatal("Couldn't certify key %s via agent: %s",

fatal_r(r, "Couldn't certify %s via agent", tmp);

tmp, ssh_err(r));

} else {

if ((sshkey_certify(public, ca, key_type_name,

if (sshkey_is_sk(ca) &&

sk_provider)) != 0)

(ca->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {

fatal("Couldn't certify key %s: %s",

notifier = notify_start(0,

tmp, ssh_err(r));

"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)

Line 1822

Line 1843

xasprintf(&out, "%s-cert.pub", tmp);

free(tmp);

if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)

if ((r = sshkey_save_public(public, out, comment)) != 0) {

fatal("Could not open \"%s\" for writing: %s", out,

fatal_r(r, "Unable to save public key to %s",

strerror(errno));

identity_file);

if ((f = fdopen(fd, "w")) == NULL)

}

fatal("%s: fdopen: %s", __func__, strerror(errno));

if ((r = sshkey_write(public, f)) != 0)

fatal("Could not write certified key to %s: %s",

out, ssh_err(r));

fprintf(f, " %s\n", comment);

fclose(f);

if (!quiet) {

sshkey_format_cert_validity(public->cert,

Line 1850

Line 1865

if (cert_serial_autoinc)

cert_serial++;

}

if (pin != NULL)

freezero(pin, strlen(pin));

free(ca_fp);

#ifdef ENABLE_PKCS11

pkcs11_terminate();

#endif

Line 1948

Line 1966

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 (strncasecmp(opt, "force-command=", 14) == 0) {

val = opt + 14;

if (*val == '\0')

Line 1965

Line 1987

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_userext = xreallocarray(cert_userext, ncert_userext + 1,

cert_ext_add(val, cp, iscrit);

sizeof(*cert_userext));

free(val);

cert_userext[ncert_userext].key = val;

cert_userext[ncert_userext].val = cp == NULL ?

NULL : xstrdup(cp);

cert_userext[ncert_userext].crit = iscrit;

ncert_userext++;

} else

fatal("Unsupported certificate option \"%s\"", opt);

}

Line 1983

Line 2000

static void

show_options(struct sshbuf *optbuf, int in_critical)

{

char *name, *arg;

char *name, *arg, *hex;

struct sshbuf *options, *option = NULL;

int r;

if ((options = sshbuf_fromb(optbuf)) == NULL)

fatal("%s: sshbuf_fromb failed", __func__);

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("%s: buffer error: %s", __func__, ssh_err(r));

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, "permit-user-rc") == 0 ||

strcmp(name, "no-touch-required") == 0)) {

printf("\n");

else if (in_critical &&

} else if (in_critical &&

(strcmp(name, "force-command") == 0 ||

strcmp(name, "source-address") == 0)) {

if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0)

fatal("%s: buffer error: %s",

fatal_fr(r, "parse critical");

__func__, ssh_err(r));

printf(" %s\n", arg);

free(arg);

} else {

} else if (sshbuf_len(option) > 0) {

printf(" UNKNOWN OPTION (len %zu)\n",

hex = sshbuf_dtob16(option);

sshbuf_len(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");

Line 2034

Line 2054

ca_fp = sshkey_fingerprint(key->cert->signature_key,

fingerprint_hash, SSH_FP_DEFAULT);

if (key_fp == NULL || ca_fp == NULL)

fatal("%s: sshkey_fingerprint fail", __func__);

fatal_f("sshkey_fingerprint fail");

sshkey_format_cert_validity(key->cert, valid, sizeof(valid));

printf(" Type: %s %s certificate\n", sshkey_ssh_name(key),

Line 2107

Line 2127

if ((key = sshkey_new(KEY_UNSPEC)) == NULL)

fatal("sshkey_new");

if ((r = sshkey_read(key, &cp)) != 0) {

error("%s:%lu: invalid key: %s", path,

error_r(r, "%s:%lu: invalid key", path, lnum);

lnum, ssh_err(r));

continue;

}

if (!sshkey_is_cert(key)) {

Line 2128

Line 2147

exit(ok ? 0 : 1);

}

#ifdef WITH_OPENSSL

static void

load_krl(const char *path, struct ssh_krl **krlp)

{

struct sshbuf *krlbuf;

int r, fd;

int r;

if ((krlbuf = sshbuf_new()) == NULL)

if ((r = sshbuf_load_file(path, &krlbuf)) != 0)

fatal("sshbuf_new failed");

fatal_r(r, "Unable to load KRL %s", path);

if ((fd = open(path, O_RDONLY)) == -1)

fatal("open %s: %s", path, strerror(errno));

if ((r = sshkey_load_file(fd, krlbuf)) != 0)

fatal("Unable to load KRL: %s", ssh_err(r));

close(fd);

/* XXX check sigs */

if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 ||

*krlp == NULL)

fatal("Invalid KRL file: %s", ssh_err(r));

fatal_r(r, "Invalid KRL file %s", path);

sshbuf_free(krlbuf);

}

Line 2174

Line 2187

tmp[tlen] = '\0';

}

if ((b = sshbuf_new()) == NULL)

fatal("%s: sshbuf_new failed", __func__);

fatal_f("sshbuf_new failed");

if ((r = sshbuf_b64tod(b, tmp)) != 0)

fatal("%s:%lu: decode hash failed: %s", file, lnum, ssh_err(r));

fatal_r(r, "%s:%lu: decode hash failed", file, lnum);

free(tmp);

*lenp = sshbuf_len(b);

*blobp = xmalloc(*lenp);

Line 2262

Line 2275

}

if (ssh_krl_revoke_cert_by_serial_range(krl,

ca, serial, serial2) != 0) {

fatal("%s: revoke serial failed",

fatal_f("revoke serial failed");

__func__);

}

} else if (strncasecmp(cp, "id:", 3) == 0) {

if (ca == NULL && !wild_ca) {

Line 2273

Line 2285

cp += 3;

cp = cp + strspn(cp, " \t");

if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0)

fatal("%s: revoke key ID failed", __func__);

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;

Line 2300

Line 2314

if ((key = sshkey_new(KEY_UNSPEC)) == NULL)

fatal("sshkey_new");

if ((r = sshkey_read(key, &cp)) != 0)

fatal("%s:%lu: invalid key: %s",

fatal_r(r, "%s:%lu: invalid key", path, lnum);

path, lnum, ssh_err(r));

if (was_explicit_key)

r = ssh_krl_revoke_key_explicit(krl, key);

else if (was_sha1) {

Line 2321

Line 2334

} else

r = ssh_krl_revoke_key(krl, key);

if (r != 0)

fatal("%s: revoke key failed: %s",

fatal_fr(r, "revoke key failed");

__func__, ssh_err(r));

freezero(blob, blen);

blob = NULL;

blen = 0;

Line 2343

Line 2355

struct ssh_krl *krl;

struct stat sb;

struct sshkey *ca = NULL;

int fd, i, r, wild_ca = 0;

int i, r, wild_ca = 0;

char *tmp;

struct sshbuf *kbuf;

Line 2362

Line 2374

else {

tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);

if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)

fatal("Cannot load CA public key %s: %s",

fatal_r(r, "Cannot load CA public key %s", tmp);

tmp, ssh_err(r));

free(tmp);

}

Line 2385

Line 2396

fatal("sshbuf_new failed");

if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0)

fatal("Couldn't generate KRL");

if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)

if ((r = sshbuf_write_file(identity_file, kbuf)) != 0)

fatal("open %s: %s", identity_file, strerror(errno));

if (atomicio(vwrite, fd, sshbuf_mutable_ptr(kbuf), sshbuf_len(kbuf)) !=

sshbuf_len(kbuf))

fatal("write %s: %s", identity_file, strerror(errno));

close(fd);

sshbuf_free(kbuf);

ssh_krl_free(krl);

sshkey_free(ca);

}

static void

do_check_krl(struct passwd *pw, int argc, char **argv)

do_check_krl(struct passwd *pw, int print_krl, int argc, char **argv)

{

int i, r, ret = 0;

char *comment;

Line 2407

Line 2414

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("Cannot load public key %s: %s",

fatal_r(r, "Cannot load public key %s", argv[i]);

argv[i], ssh_err(r));

r = ssh_krl_check_key(krl, k);

printf("%s%s%s%s: %s\n", argv[i],

*comment ? " (" : "", comment, *comment ? ")" : "",

Line 2423

Line 2431

ssh_krl_free(krl);

exit(ret);

}

#endif

static struct sshkey *

load_sign_key(const char *keypath, const struct sshkey *pubkey)

Line 2435

Line 2442

int r;

* If passed a public key filename, then try to locate the correponding

* 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.

Line 2445

Line 2452

strcmp(privpath + plen - slen, suffixes[i]) != 0)

continue;

privpath[plen - slen] = '\0';

debug("%s: %s looks like a public key, using private key "

debug_f("%s looks like a public key, using private key "

"path %s instead", __func__, keypath, privpath);

"path %s instead", keypath, privpath);

}

if ((privkey = load_identity(privpath, NULL)) == NULL) {

error("Couldn't load identity %s", keypath);

Line 2463

Line 2470

* it capable of signing.

if ((r = sshkey_to_certified(privkey)) != 0) {

error("%s: sshkey_to_certified: %s", __func__,

error_fr(r, "sshkey_to_certified");

ssh_err(r));

goto done;

}

if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) {

error("%s: sshkey_cert_copy: %s", __func__, ssh_err(r));

error_fr(r, "sshkey_cert_copy");

goto done;

}

Line 2483

Line 2489

static int

sign_one(struct sshkey *signkey, const char *filename, int fd,

const char *sig_namespace, sshsig_signer *signer, void *signer_ctx)

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;

char *wfile = NULL, *asig = NULL, *fp = NULL;

char *asig = NULL;

char *pin = NULL, *prompt = NULL;

if (!quiet) {

if (fd == STDIN_FILENO)

Line 2496

Line 2503

else

fprintf(stderr, "Signing file %s\n", filename);

}

if ((r = sshsig_sign_fd(signkey, NULL, sk_provider, fd, sig_namespace,

if (signer == NULL && sshkey_is_sk(signkey)) {

&sigbuf, signer, signer_ctx)) != 0) {

if ((signkey->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {

error("Signing %s failed: %s", filename, ssh_err(r));

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("%s: sshsig_armor: %s", __func__, ssh_err(r));

error_fr(r, "sshsig_armor");

goto out;

}

if ((asig = sshbuf_dup_string(abuf)) == NULL) {

error("%s: buffer error", __func__);

error_f("buffer error");

r = SSH_ERR_ALLOC_FAIL;

goto out;

}

Line 2545

Line 2569

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)

Line 2554

Line 2581

}

static int

sign(const char *keypath, const char *sig_namespace, int argc, char **argv)

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 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++) {

Line 2569

Line 2641

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("Couldn't load public key %s: %s", keypath, ssh_err(r));

error_r(r, "Couldn't load public key %s", keypath);

goto done;

}

if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)

debug("Couldn't get agent socket: %s", ssh_err(r));

debug_r(r, "Couldn't get agent socket");

else {

if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0)

signer = agent_signer;

else

debug("Couldn't find key in agent: %s", ssh_err(r));

debug_r(r, "Couldn't find key in agent");

}

if (signer == NULL) {

Line 2595

Line 2670

if (argc == 0) {

if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO,

sig_namespace, signer, &agent_fd)) != 0)

sig_namespace, hashalg, signer, &agent_fd)) != 0)

goto done;

} else {

for (i = 0; i < argc; i++) {

Line 2607

Line 2682

goto done;

}

if ((r = sign_one(signkey, argv[i], fd, sig_namespace,

signer, &agent_fd)) != 0)

hashalg, signer, &agent_fd)) != 0)

goto done;

if (fd != STDIN_FILENO)

close(fd);

Line 2621

Line 2696

close(fd);

sshkey_free(pubkey);

sshkey_free(privkey);

free(hashalg);

return ret;

}

static int

verify(const char *signature, const char *sig_namespace, const char *principal,

sig_verify(const char *signature, const char *sig_namespace,

const char *allowed_keys, const char *revoked_keys)

const char *principal, const char *allowed_keys, const char *revoked_keys,

char * const *opts, size_t nopts)

{

int r, ret = -1, sigfd = -1;

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 ((abuf = sshbuf_new()) == NULL)

if (sig_process_opts(opts, nopts, NULL, &verify_time,

fatal("%s: sshbuf_new() failed", __func__);

&print_pubkey) != 0)

goto done; /* error already logged */

if ((sigfd = open(signature, O_RDONLY)) < 0) {

memset(&sig_details, 0, sizeof(sig_details));

error("Couldn't open signature file %s", signature);

if ((r = sshbuf_load_file(signature, &abuf)) != 0) {

error_r(r, "Couldn't read signature file");

goto done;

}

if ((r = sshkey_load_file(sigfd, abuf)) != 0) {

if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {

error("Couldn't read signature file: %s", ssh_err(r));

error_fr(r, "sshsig_armor");

goto done;

}

if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {

error("%s: sshsig_armor: %s", __func__, ssh_err(r));

return r;

}

if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace,

&sign_key)) != 0)

&sign_key, &sig_details)) != 0)

goto done; /* sshsig_verify() prints error */

if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,

SSH_FP_DEFAULT)) == NULL)

fatal("%s: sshkey_fingerprint failed", __func__);

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("sshkey_check_revoked failed: %s", ssh_err(r));

debug3_fr(r, "sshkey_check_revoked");

goto done;

}

if (allowed_keys != NULL &&

if (allowed_keys != NULL && (r = sshsig_check_allowed_keys(allowed_keys,

(r = sshsig_check_allowed_keys(allowed_keys, sign_key,

sign_key, principal, sig_namespace, verify_time)) != 0) {

principal, sig_namespace)) != 0) {

debug3_fr(r, "sshsig_check_allowed_keys");

debug3("sshsig_check_allowed_keys failed: %s", ssh_err(r));

goto done;

}

/* success */

Line 2679

Line 2760

if (!quiet) {

if (ret == 0) {

if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,

SSH_FP_DEFAULT)) == NULL) {

SSH_FP_DEFAULT)) == NULL)

fatal("%s: sshkey_fingerprint failed",

fatal_f("sshkey_fingerprint failed");

__func__);

}

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");

}

if (sigfd != -1)

/* Print the signature key if requested */

close(sigfd);

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 */

}

static char *

private_key_passphrase(void)

{

char *passphrase1, *passphrase2;

/* 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): ", RP_ALLOW_STDIN);

passphrase2 = read_passphrase("Enter same passphrase again: ",

RP_ALLOW_STDIN);

if (strcmp(passphrase1, passphrase2) != 0) {

* The passphrases do not match. Clear them and

* retry.

freezero(passphrase1, strlen(passphrase1));

freezero(passphrase2, strlen(passphrase2));

printf("Passphrases do not match. Try again.\n");

goto passphrase_again;

}

/* Clear the other copy of the passphrase. */

freezero(passphrase2, strlen(passphrase2));

}

return passphrase1;

}

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

ret = xstrdup(application);

/* Count trailing zeros in user */

for (i = 0; i < userlen; i++) {

if (user[userlen - i - 1] != 0)

break;

}

if (i >= userlen)

return ret; /* user-id was default all-zeros */

/* Append user-id, escaping non-UTF-8 characters */

slen = userlen - i;

if (asmprintf(&cp, INT_MAX, NULL, "%.*s", (int)slen, user) == -1)

fatal_f("asmprintf failed");

/* Don't emit a user-id that contains path or control characters */

if (strchr(cp, '/') != NULL || strstr(cp, "..") != NULL ||

strchr(cp, '\\') != NULL) {

free(cp);

cp = tohex(user, slen);

}

xextendf(&ret, "_", "%s", cp);

free(cp);

return ret;

}

static int

do_download_sk(const char *skprovider, const char *device)

{

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;

if (skprovider == NULL)

fatal("Cannot download keys without provider");

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));

for (i = 0; i < nsrks; i++) {

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;

}

static void

save_attestation(struct sshbuf *attest, const char *path)

{

mode_t omask;

int r;

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);

}

static void

usage(void)

{

fprintf(stderr,

"usage: ssh-keygen [-q] [-b bits] [-C comment] [-f output_keyfile] [-m format]\n"

"usage: ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f output_keyfile]\n"

" [-t dsa | ecdsa | ecdsa-sk | ed25519 | rsa]\n"

" [-m format] [-N new_passphrase] [-O option]\n"

" [-N new_passphrase] [-w provider] [-x flags]\n"

" ssh-keygen -p [-f keyfile] [-m format] [-N new_passphrase]\n"

" [-w provider] [-Z cipher]\n"

" [-P old_passphrase]\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 [-C comment] [-f keyfile] [-P passphrase]\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

Line 2727

Line 3188

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 -G output_file [-v] [-b bits] [-M memory] [-S start_point]\n"

" ssh-keygen -M generate [-O option] output_file\n"

" ssh-keygen -f input_file -T output_file [-v] [-a rounds] [-J num_lines]\n"

" ssh-keygen -M screen [-f input_file] [-O option] output_file\n"

" [-j start_line] [-K checkpt] [-W generator]\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 [-f prefix_path]\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 -f krl_file 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 ...\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 revocation_file]\n");

" -n namespace -s signature_file [-r krl_file] [-O option]\n");

exit(1);

}

Line 2755

Line 3218

int

main(int argc, char **argv)

{

char dotsshdir[PATH_MAX], comment[1024], *passphrase1, *passphrase2;

char comment[1024], *passphrase;

char *rr_hostname = NULL, *ep, *fp, *ra;

struct sshkey *private, *public;

struct passwd *pw;

struct stat st;

int r, opt, type;

int r, opt, type, fd;

int change_passphrase = 0, change_comment = 0, show_cert = 0;

int find_host = 0, delete_host = 0, hash_hosts = 0;

int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0;

int prefer_agent = 0, convert_to = 0, convert_from = 0;

int print_public = 0, print_generic = 0, cert_serial_autoinc = 0;

unsigned long long ull, cert_serial = 0;

int do_gen_candidates = 0, do_screen_candidates = 0, download_sk = 0;

char *identity_comment = NULL, *ca_key_path = NULL;

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;

FILE *f;

const char *errstr;

int log_level = SYSLOG_LEVEL_INFO;

char *sign_op = NULL;

#ifdef WITH_OPENSSL

/* Moduli generation/screening */

char out_file[PATH_MAX], *checkpoint = NULL;

u_int32_t memory = 0, generator_wanted = 0;

int do_gen_candidates = 0, do_screen_candidates = 0;

unsigned long start_lineno = 0, lines_to_process = 0;

BIGNUM *start = NULL;

#endif

extern int optind;

extern char *optarg;

Line 2800

Line 3258

pw = getpwuid(getuid());

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));

sk_provider = getenv("SSH_SK_PROVIDER");

/* Remaining character: d */

/* Remaining characters: dGjJSTWx */

while ((opt = getopt(argc, argv, "ABHLQUXceghiklopquvy"

while ((opt = getopt(argc, argv, "ABHKLQUXceghiklopquvy"

"C:D:E:F:G:I:J:K:M:N:O:P:R:S:T:V:W:Y:Z:"

"C:D:E:F:I:M:N:O:P:R:V:Y:Z:"

"a:b:f:g:j:m:n:r:s:t:w:x:z:")) != -1) {

"a:b:f:g:m:n:r:s:t:w:z:")) != -1) {

switch (opt) {

case 'A':

gen_all_hostkeys = 1;

Line 2886

Line 3345

case 'g':

print_generic = 1;

break;

case 'K':

download_sk = 1;

break;

case 'P':

identity_passphrase = optarg;

break;

Line 2896

Line 3358

check_krl = 1;

break;

case 'O':

add_cert_option(optarg);

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;

Line 2964

Line 3431

break;

case 'Y':

sign_op = optarg;

break;

case 'w':

sk_provider = optarg;

break;

case 'x':

if (*optarg == '\0')

fatal("Missing security key flags");

ull = strtoull(optarg, &ep, 0);

if (*ep != '\0')

fatal("Security key flags \"%s\" is not a "

"number", optarg);

if (ull > 0xff)

fatal("Invalid security key flags 0x%llx", ull);

sk_flags = (uint8_t)ull;

break;

case 'z':

errno = 0;

if (*optarg == '+') {

Line 2989

Line 3446

(errno == ERANGE && cert_serial == ULLONG_MAX))

fatal("Invalid serial number \"%s\"", optarg);

break;

#ifdef WITH_OPENSSL

/* Moduli generation/screening */

case 'G':

do_gen_candidates = 1;

if (strlcpy(out_file, optarg, sizeof(out_file)) >=

sizeof(out_file))

fatal("Output filename too long");

break;

case 'J':

lines_to_process = strtoul(optarg, NULL, 10);

break;

case 'j':

start_lineno = strtoul(optarg, NULL, 10);

break;

case 'K':

if (strlen(optarg) >= PATH_MAX)

fatal("Checkpoint filename too long");

checkpoint = xstrdup(optarg);

break;

case 'M':

memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX,

if (strcmp(optarg, "generate") == 0)

&errstr);

do_gen_candidates = 1;

if (errstr)

else if (strcmp(optarg, "screen") == 0)

fatal("Memory limit is %s: %s", errstr, optarg);

do_screen_candidates = 1;

else

fatal("Unsupported moduli option %s", optarg);

break;

case 'S':

/* XXX - also compare length against bits */

if (BN_hex2bn(&start, optarg) == 0)

fatal("Invalid start point.");

break;

case 'T':

do_screen_candidates = 1;

if (strlcpy(out_file, optarg, sizeof(out_file)) >=

sizeof(out_file))

fatal("Output filename too long");

break;

case 'W':

generator_wanted = (u_int32_t)strtonum(optarg, 1,

UINT_MAX, &errstr);

if (errstr != NULL)

fatal("Desired generator invalid: %s (%s)",

optarg, errstr);

break;

#endif /* WITH_OPENSSL */

case '?':

default:

usage();

}

if (sk_provider == NULL)

sk_provider = "internal";

/* reinit */

log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);

Line 3046

Line 3470

argc -= optind;

if (sign_op != NULL) {

if (cert_principals == NULL || *cert_principals == '\0') {

if (strncmp(sign_op, "find-principals", 15) == 0) {

error("Too few arguments for sign/verify: "

if (ca_key_path == NULL) {

"missing namespace");

error("Too few arguments for find-principals:"

exit(1);

"missing signature file");

}

exit(1);

if (strncmp(sign_op, "sign", 4) == 0) {

}

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 sign(identity_file, cert_principals, argc, argv);

return sig_sign(identity_file, cert_principals,

argc, argv, opts, nopts);

} else if (strncmp(sign_op, "check-novalidate", 16) == 0) {

if (ca_key_path == NULL) {

error("Too few arguments for check-novalidate: "

"missing signature file");

exit(1);

}

return verify(ca_key_path, cert_principals,

return sig_verify(ca_key_path, cert_principals,

NULL, NULL, NULL);

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");

Line 3079

Line 3539

}

if (cert_key_id == NULL) {

error("Too few arguments for verify: "

"missing principal ID");

"missing principal identity");

exit(1);

}

return verify(ca_key_path, cert_principals,

return sig_verify(ca_key_path, cert_principals,

cert_key_id, identity_file, rr_hostname);

cert_key_id, identity_file, rr_hostname,

opts, nopts);

}

error("Unsupported operation for -Y: \"%s\"", sign_op);

usage();

/* NOTREACHED */

}

Line 3094

Line 3556

error("Too few arguments.");

usage();

}

} else if (argc > 0 && !gen_krl && !check_krl) {

} else if (argc > 0 && !gen_krl && !check_krl &&

!do_gen_candidates && !do_screen_candidates) {

error("Too many arguments.");

usage();

}

Line 3106

Line 3569

error("Cannot use -l with -H or -R.");

usage();

}

#ifdef WITH_OPENSSL

if (gen_krl) {

do_gen_krl(pw, update_krl, ca_key_path,

cert_serial, identity_comment, argc, argv);

return (0);

}

if (check_krl) {

do_check_krl(pw, argc, argv);

do_check_krl(pw, print_fingerprint, argc, argv);

return (0);

}

#endif

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);

}

Line 3131

Line 3594

}

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)

Line 3180

Line 3654

}

#ifdef WITH_OPENSSL

if (do_gen_candidates || do_screen_candidates) {

if (argc <= 0)

fatal("No output file specified");

else if (argc > 1)

fatal("Too many output files specified");

}

if (do_gen_candidates) {

FILE *out = fopen(out_file, "w");

do_moduli_gen(argv[0], opts, nopts);

return 0;

if (out == NULL) {

error("Couldn't open modulus candidate file \"%s\": %s",

out_file, strerror(errno));

return (1);

}

if (bits == 0)

bits = DEFAULT_BITS;

if (gen_candidates(out, memory, bits, start) != 0)

fatal("modulus candidate generation failed");

return (0);

}

if (do_screen_candidates) {

FILE *in;

do_moduli_screen(argv[0], opts, nopts);

FILE *out = fopen(out_file, "a");

return 0;

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));

}

} else

in = stdin;

if (out == NULL) {

fatal("Couldn't open moduli file \"%s\": %s",

out_file, strerror(errno));

}

if (prime_test(in, out, rounds == 0 ? 100 : rounds,

generator_wanted, checkpoint,

start_lineno, lines_to_process) != 0)

fatal("modulus screening failed");

return (0);

}

#endif

if (gen_all_hostkeys) {

do_gen_all_hostkeys(pw);

Line 3239

Line 3686

switch (type) {

case KEY_ECDSA_SK:

case KEY_ED25519_SK:

if (sshsk_enroll(type, sk_provider,

for (i = 0; i < nopts; i++) {

cert_key_id == NULL ? "ssh:" : cert_key_id,

if (strcasecmp(opts[i], "no-touch-required") == 0) {

sk_flags, NULL, &private, NULL) != 0)

sk_flags &= ~SSH_SK_USER_PRESENCE_REQD;

exit(1); /* error message already printed */

} 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 (!quiet) {

printf("You may need to touch your authenticator "

"to authorize key generation.\n");

}

if ((attest = sshbuf_new()) == NULL)

fatal("sshbuf_new failed");

if ((sk_flags &

(SSH_SK_USER_VERIFICATION_REQD|SSH_SK_RESIDENT_KEY))) {

passphrase = read_passphrase("Enter PIN for "

"authenticator: ", RP_ALLOW_STDIN);

} else {

passphrase = NULL;

}

for (i = 0 ; ; i++) {

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_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 (!quiet) {

printf("You may need to touch your "

"authenticator (again) to authorize "

"key generation.\n");

}

if (passphrase != NULL) {

freezero(passphrase, strlen(passphrase));

passphrase = NULL;

}

break;

default:

if ((r = sshkey_generate(type, bits, &private)) != 0)

Line 3250

Line 3768

break;

}

if ((r = sshkey_from_private(private, &public)) != 0)

fatal("sshkey_from_private failed: %s\n", ssh_err(r));

fatal_r(r, "sshkey_from_private");

if (!have_identity)

ask_filename(pw, "Enter file in which to save the key");

/* Create ~/.ssh directory if it doesn't already exist. */

snprintf(dotsshdir, sizeof dotsshdir, "%s/%s",

hostfile_create_user_ssh_dir(identity_file, !quiet);

pw->pw_dir, _PATH_SSH_USER_DIR);

if (strstr(identity_file, dotsshdir) != NULL) {

if (stat(dotsshdir, &st) == -1) {

if (errno != ENOENT) {

error("Could not stat %s: %s", dotsshdir,

strerror(errno));

} else if (mkdir(dotsshdir, 0700) == -1) {

error("Could not create directory '%s': %s",

dotsshdir, strerror(errno));

} else if (!quiet)

printf("Created directory '%s'.\n", dotsshdir);

}

/* If the file already exists, ask the user to confirm. */

if (!confirm_overwrite(identity_file))

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): ", RP_ALLOW_STDIN);

passphrase2 = read_passphrase("Enter same passphrase again: ",

RP_ALLOW_STDIN);

if (strcmp(passphrase1, passphrase2) != 0) {

* The passphrases do not match. Clear them and

* retry.

explicit_bzero(passphrase1, strlen(passphrase1));

explicit_bzero(passphrase2, strlen(passphrase2));

free(passphrase1);

free(passphrase2);

printf("Passphrases do not match. Try again.\n");

goto passphrase_again;

}

/* Clear the other copy of the passphrase. */

explicit_bzero(passphrase2, strlen(passphrase2));

free(passphrase2);

}

/* Determine the passphrase for the private key */

passphrase = private_key_passphrase();

if (identity_comment) {

strlcpy(comment, identity_comment, sizeof(comment));

} else {

Line 3310

Line 3790

}

/* Save the key with the given passphrase and comment. */

if ((r = sshkey_save_private(private, identity_file, passphrase1,

if ((r = sshkey_save_private(private, identity_file, passphrase,

comment, private_key_format, openssh_format_cipher, rounds)) != 0) {

error("Saving key \"%s\" failed: %s",

error_r(r, "Saving key \"%s\" failed", identity_file);

identity_file, ssh_err(r));

freezero(passphrase, strlen(passphrase));

explicit_bzero(passphrase1, strlen(passphrase1));

free(passphrase1);

exit(1);

}

/* Clear the passphrase. */

freezero(passphrase, strlen(passphrase));

explicit_bzero(passphrase1, strlen(passphrase1));

free(passphrase1);

/* Clear the private key and the random number generator. */

sshkey_free(private);

if (!quiet)

if (!quiet) {

printf("Your identification has been saved in %s.\n", identity_file);

printf("Your identification has been saved in %s\n",

identity_file);

}

strlcat(identity_file, ".pub", sizeof(identity_file));

if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)

if ((r = sshkey_save_public(public, identity_file, comment)) != 0)

fatal("Unable to save public key to %s: %s",

fatal_r(r, "Unable to save public key to %s", identity_file);

identity_file, strerror(errno));

if ((f = fdopen(fd, "w")) == NULL)

fatal("fdopen %s failed: %s", identity_file, strerror(errno));

if ((r = sshkey_write(public, f)) != 0)

error("write key failed: %s", ssh_err(r));

fprintf(f, " %s\n", comment);

if (ferror(f) || fclose(f) != 0)

fatal("write public failed: %s", strerror(errno));

if (!quiet) {

fp = sshkey_fingerprint(public, fingerprint_hash,

Line 3347

Line 3815

SSH_FP_RANDOMART);

if (fp == NULL || ra == NULL)

fatal("sshkey_fingerprint failed");

printf("Your public key has been saved in %s.\n",

printf("Your public key has been saved in %s\n",

identity_file);

printf("The key fingerprint is:\n");

printf("%s %s\n", fp, comment);

Line 3357

Line 3825

free(fp);

}

if (sk_attestation_path != NULL)

save_attestation(attest, sk_attestation_path);

sshbuf_free(attest);

sshkey_free(public);

exit(0);

}