version 1.10, 1999/11/20 19:53:40 |
version 1.54, 2001/04/03 13:56:11 |
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/* |
/* |
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* Author: Tatu Ylonen <ylo@cs.hut.fi> |
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* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
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* All rights reserved |
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* Identity and host key generation and maintenance. |
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* |
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* As far as I am concerned, the code I have written for this software |
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* can be used freely for any purpose. Any derived versions of this |
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* software must be clearly marked as such, and if the derived work is |
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* incompatible with the protocol description in the RFC file, it must be |
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* called by a name other than "ssh" or "Secure Shell". |
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*/ |
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ssh-keygen.c |
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Author: Tatu Ylonen <ylo@cs.hut.fi> |
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Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
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All rights reserved |
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Created: Mon Mar 27 02:26:40 1995 ylo |
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Identity and host key generation and maintenance. |
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*/ |
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#include "includes.h" |
#include "includes.h" |
RCSID("$Id$"); |
RCSID("$OpenBSD$"); |
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#include "rsa.h" |
#include <openssl/evp.h> |
#include "ssh.h" |
#include <openssl/pem.h> |
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#include "xmalloc.h" |
#include "xmalloc.h" |
#include "fingerprint.h" |
#include "key.h" |
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#include "rsa.h" |
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#include "authfile.h" |
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#include "uuencode.h" |
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#include "buffer.h" |
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#include "bufaux.h" |
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#include "pathnames.h" |
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#include "log.h" |
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#include "readpass.h" |
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/* Generated private key. */ |
/* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ |
RSA *private_key; |
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/* Generated public key. */ |
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RSA *public_key; |
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/* Number of bits in the RSA key. This value can be changed on the command |
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line. */ |
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int bits = 1024; |
int bits = 1024; |
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/* Flag indicating that we just want to change the passphrase. This can be |
/* |
set on the command line. */ |
* Flag indicating that we just want to change the passphrase. This can be |
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* set on the command line. |
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*/ |
int change_passphrase = 0; |
int change_passphrase = 0; |
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/* Flag indicating that we just want to change the comment. This can be set |
/* |
on the command line. */ |
* Flag indicating that we just want to change the comment. This can be set |
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* on the command line. |
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*/ |
int change_comment = 0; |
int change_comment = 0; |
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int quiet = 0; |
int quiet = 0; |
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/* Flag indicating that we just want to see the key fingerprint */ |
/* Flag indicating that we just want to see the key fingerprint */ |
int print_fingerprint = 0; |
int print_fingerprint = 0; |
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int print_bubblebabble = 0; |
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/* The identity file name, given on the command line or entered by the user. */ |
/* The identity file name, given on the command line or entered by the user. */ |
char identity_file[1024]; |
char identity_file[1024]; |
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/* This is set to the new comment if given on the command line. */ |
/* This is set to the new comment if given on the command line. */ |
char *identity_comment = NULL; |
char *identity_comment = NULL; |
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/* Dump public key file in format used by real and the original SSH 2 */ |
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int convert_to_ssh2 = 0; |
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int convert_from_ssh2 = 0; |
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int print_public = 0; |
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/* default to RSA for SSH-1 */ |
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char *key_type_name = "rsa1"; |
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/* argv0 */ |
/* argv0 */ |
extern char *__progname; |
extern char *__progname; |
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char hostname[MAXHOSTNAMELEN]; |
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void |
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); |
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printf("%s (%s): ", prompt, identity_file); |
switch (key_type_from_name(key_type_name)) { |
fflush(stdout); |
case KEY_RSA1: |
if (fgets(buf, sizeof(buf), stdin) == NULL) |
name = _PATH_SSH_CLIENT_IDENTITY; |
exit(1); |
break; |
if (strchr(buf, '\n')) |
case KEY_DSA: |
*strchr(buf, '\n') = 0; |
name = _PATH_SSH_CLIENT_ID_DSA; |
if (strcmp(buf, "") != 0) |
break; |
strlcpy(identity_file, buf, sizeof(identity_file)); |
case KEY_RSA: |
have_identity = 1; |
name = _PATH_SSH_CLIENT_ID_RSA; |
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break; |
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default: |
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fprintf(stderr, "bad key type"); |
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exit(1); |
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break; |
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} |
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snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); |
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fprintf(stderr, "%s (%s): ", prompt, identity_file); |
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fflush(stderr); |
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if (fgets(buf, sizeof(buf), stdin) == NULL) |
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exit(1); |
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if (strchr(buf, '\n')) |
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*strchr(buf, '\n') = 0; |
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if (strcmp(buf, "") != 0) |
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strlcpy(identity_file, buf, sizeof(identity_file)); |
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have_identity = 1; |
} |
} |
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void |
Key * |
do_fingerprint(struct passwd *pw) |
try_load_pem_key(char *filename) |
{ |
{ |
char *comment; |
char *pass; |
RSA *public_key; |
Key *prv; |
struct stat st; |
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if (!have_identity) |
prv = key_load_private(filename, "", NULL); |
ask_filename(pw, "Enter file in which the key is"); |
if (prv == NULL) { |
if (stat(identity_file, &st) < 0) |
pass = read_passphrase("Enter passphrase: ", 1); |
{ |
prv = key_load_private(filename, pass, NULL); |
perror(identity_file); |
memset(pass, 0, strlen(pass)); |
exit(1); |
xfree(pass); |
} |
} |
public_key = RSA_new(); |
return prv; |
if (!load_public_key(identity_file, public_key, &comment)) { |
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char *cp, line[1024]; |
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BIGNUM *e, *n; |
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int dummy, invalid = 0; |
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FILE *f = fopen(identity_file, "r"); |
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n = BN_new(); |
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e = BN_new(); |
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if (f && fgets(line, sizeof(line), f)) { |
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cp = line; |
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line[strlen(line)-1] = '\0'; |
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if (auth_rsa_read_key(&cp, &dummy, e, n)) { |
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public_key->e = e; |
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public_key->n = n; |
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comment = xstrdup(cp ? cp : "no comment"); |
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} else { |
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invalid = 1; |
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} |
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} else { |
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invalid = 1; |
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} |
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if (invalid) { |
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printf("%s is not a valid key file.\n", identity_file); |
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BN_free(e); |
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BN_free(n); |
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exit(1); |
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} |
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} |
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printf("%d %s %s\n", BN_num_bits(public_key->n), |
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fingerprint(public_key->e, public_key->n), |
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comment); |
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RSA_free(public_key); |
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exit(0); |
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} |
} |
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/* Perform changing a passphrase. The argument is the passwd structure |
#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
for the current user. */ |
#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
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#define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
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#define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
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void |
void |
do_change_passphrase(struct passwd *pw) |
do_convert_to_ssh2(struct passwd *pw) |
{ |
{ |
char *comment; |
Key *prv; |
char *old_passphrase, *passphrase1, *passphrase2; |
int len; |
struct stat st; |
u_char *blob; |
RSA *private_key; |
struct stat st; |
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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) < 0) { |
if (stat(identity_file, &st) < 0) |
perror(identity_file); |
{ |
exit(1); |
perror(identity_file); |
} |
exit(1); |
prv = try_load_pem_key(identity_file); |
} |
if (prv == NULL) { |
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fprintf(stderr, "load failed\n"); |
/* Try to load the public key from the file the verify that it is |
exit(1); |
readable and of the proper format. */ |
} |
public_key = RSA_new(); |
key_to_blob(prv, &blob, &len); |
if (!load_public_key(identity_file, public_key, NULL)) |
fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
{ |
fprintf(stdout, |
printf("%s is not a valid key file.\n", identity_file); |
"Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", |
exit(1); |
key_size(prv), key_type(prv), |
} |
pw->pw_name, hostname); |
/* Clear the public key since we are just about to load the whole file. */ |
dump_base64(stdout, blob, len); |
RSA_free(public_key); |
fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
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key_free(prv); |
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xfree(blob); |
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exit(0); |
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} |
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/* Try to load the file with empty passphrase. */ |
void |
private_key = RSA_new(); |
buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
if (!load_private_key(identity_file, "", private_key, &comment)) { |
{ |
/* Read passphrase from the user. */ |
int bits = buffer_get_int(b); |
if (identity_passphrase) |
int bytes = (bits + 7) / 8; |
old_passphrase = xstrdup(identity_passphrase); |
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else |
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old_passphrase = read_passphrase("Enter old passphrase: ", 1); |
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/* Try to load using the passphrase. */ |
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if (!load_private_key(identity_file, old_passphrase, private_key, &comment)) |
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{ |
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memset(old_passphrase, 0, strlen(old_passphrase)); |
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xfree(old_passphrase); |
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printf("Bad passphrase.\n"); |
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exit(1); |
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} |
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/* Destroy the passphrase. */ |
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memset(old_passphrase, 0, strlen(old_passphrase)); |
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xfree(old_passphrase); |
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} |
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printf("Key has comment '%s'\n", comment); |
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/* Ask the new passphrase (twice). */ |
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if (identity_new_passphrase) |
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{ |
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passphrase1 = xstrdup(identity_new_passphrase); |
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passphrase2 = NULL; |
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} |
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else |
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{ |
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passphrase1 = |
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read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); |
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passphrase2 = read_passphrase("Enter same passphrase again: ", 1); |
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/* Verify that they are the same. */ |
if (buffer_len(b) < bytes) |
if (strcmp(passphrase1, passphrase2) != 0) |
fatal("buffer_get_bignum_bits: input buffer too small: " |
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"need %d have %d", bytes, buffer_len(b)); |
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BN_bin2bn((u_char *)buffer_ptr(b), bytes, value); |
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buffer_consume(b, bytes); |
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} |
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Key * |
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do_convert_private_ssh2_from_blob(char *blob, int blen) |
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{ |
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Buffer b; |
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Key *key = NULL; |
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int ignore, magic, rlen, ktype; |
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char *type, *cipher; |
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buffer_init(&b); |
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buffer_append(&b, blob, blen); |
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magic = buffer_get_int(&b); |
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if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { |
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error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); |
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buffer_free(&b); |
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return NULL; |
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} |
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ignore = buffer_get_int(&b); |
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type = buffer_get_string(&b, NULL); |
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cipher = buffer_get_string(&b, NULL); |
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ignore = buffer_get_int(&b); |
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ignore = buffer_get_int(&b); |
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ignore = buffer_get_int(&b); |
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if (strcmp(cipher, "none") != 0) { |
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error("unsupported cipher %s", cipher); |
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xfree(cipher); |
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buffer_free(&b); |
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xfree(type); |
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return NULL; |
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} |
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xfree(cipher); |
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if (strstr(type, "dsa")) { |
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ktype = KEY_DSA; |
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} else if (strstr(type, "rsa")) { |
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ktype = KEY_RSA; |
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} else { |
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xfree(type); |
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return NULL; |
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} |
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key = key_new_private(ktype); |
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xfree(type); |
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switch (key->type) { |
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case KEY_DSA: |
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buffer_get_bignum_bits(&b, key->dsa->p); |
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buffer_get_bignum_bits(&b, key->dsa->g); |
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buffer_get_bignum_bits(&b, key->dsa->q); |
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buffer_get_bignum_bits(&b, key->dsa->pub_key); |
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buffer_get_bignum_bits(&b, key->dsa->priv_key); |
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break; |
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case KEY_RSA: |
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if (!BN_set_word(key->rsa->e, (u_long) buffer_get_char(&b))) { |
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buffer_free(&b); |
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key_free(key); |
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return NULL; |
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} |
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buffer_get_bignum_bits(&b, key->rsa->d); |
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buffer_get_bignum_bits(&b, key->rsa->n); |
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buffer_get_bignum_bits(&b, key->rsa->iqmp); |
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buffer_get_bignum_bits(&b, key->rsa->q); |
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buffer_get_bignum_bits(&b, key->rsa->p); |
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generate_additional_parameters(key->rsa); |
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break; |
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} |
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rlen = buffer_len(&b); |
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if(rlen != 0) |
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error("do_convert_private_ssh2_from_blob: " |
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"remaining bytes in key blob %d", rlen); |
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buffer_free(&b); |
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#ifdef DEBUG_PK |
{ |
{ |
memset(passphrase1, 0, strlen(passphrase1)); |
u_int slen; |
memset(passphrase2, 0, strlen(passphrase2)); |
u_char *sig, data[10] = "abcde12345"; |
xfree(passphrase1); |
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xfree(passphrase2); |
key_sign(key, &sig, &slen, data, sizeof data); |
printf("Pass phrases do not match. Try again.\n"); |
key_verify(key, sig, slen, data, sizeof data); |
exit(1); |
xfree(sig); |
} |
} |
/* Destroy the other copy. */ |
#endif |
memset(passphrase2, 0, strlen(passphrase2)); |
return key; |
xfree(passphrase2); |
} |
} |
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/* Save the file using the new passphrase. */ |
void |
if (!save_private_key(identity_file, passphrase1, private_key, comment)) |
do_convert_from_ssh2(struct passwd *pw) |
{ |
{ |
printf("Saving the key failed: %s: %s.\n", |
Key *k; |
identity_file, strerror(errno)); |
int blen; |
memset(passphrase1, 0, strlen(passphrase1)); |
char line[1024], *p; |
xfree(passphrase1); |
char blob[8096]; |
RSA_free(private_key); |
char encoded[8096]; |
xfree(comment); |
struct stat st; |
exit(1); |
int escaped = 0, private = 0, ok; |
} |
FILE *fp; |
/* Destroy the passphrase and the copy of the key in memory. */ |
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memset(passphrase1, 0, strlen(passphrase1)); |
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xfree(passphrase1); |
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RSA_free(private_key); /* Destroys contents */ |
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xfree(comment); |
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printf("Your identification has been saved with the new passphrase.\n"); |
if (!have_identity) |
exit(0); |
ask_filename(pw, "Enter file in which the key is"); |
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if (stat(identity_file, &st) < 0) { |
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perror(identity_file); |
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exit(1); |
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} |
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fp = fopen(identity_file, "r"); |
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if (fp == NULL) { |
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perror(identity_file); |
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exit(1); |
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} |
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encoded[0] = '\0'; |
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while (fgets(line, sizeof(line), fp)) { |
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if (!(p = strchr(line, '\n'))) { |
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fprintf(stderr, "input line too long.\n"); |
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exit(1); |
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} |
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if (p > line && p[-1] == '\\') |
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escaped++; |
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if (strncmp(line, "----", 4) == 0 || |
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strstr(line, ": ") != NULL) { |
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if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
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private = 1; |
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fprintf(stderr, "ignore: %s", line); |
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continue; |
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} |
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if (escaped) { |
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escaped--; |
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fprintf(stderr, "escaped: %s", line); |
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continue; |
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} |
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*p = '\0'; |
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strlcat(encoded, line, sizeof(encoded)); |
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} |
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blen = uudecode(encoded, (u_char *)blob, sizeof(blob)); |
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if (blen < 0) { |
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fprintf(stderr, "uudecode failed.\n"); |
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exit(1); |
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} |
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k = private ? |
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do_convert_private_ssh2_from_blob(blob, blen) : |
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key_from_blob(blob, blen); |
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if (k == NULL) { |
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fprintf(stderr, "decode blob failed.\n"); |
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exit(1); |
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} |
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ok = private ? |
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(k->type == KEY_DSA ? |
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PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) : |
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PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) : |
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key_write(k, stdout); |
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if (!ok) { |
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fprintf(stderr, "key write failed"); |
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exit(1); |
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} |
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key_free(k); |
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fprintf(stdout, "\n"); |
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fclose(fp); |
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exit(0); |
} |
} |
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/* Change the comment of a private key file. */ |
void |
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do_print_public(struct passwd *pw) |
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{ |
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Key *prv; |
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struct stat st; |
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if (!have_identity) |
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ask_filename(pw, "Enter file in which the key is"); |
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if (stat(identity_file, &st) < 0) { |
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perror(identity_file); |
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exit(1); |
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} |
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prv = try_load_pem_key(identity_file); |
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if (prv == NULL) { |
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fprintf(stderr, "load failed\n"); |
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exit(1); |
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} |
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if (!key_write(prv, stdout)) |
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fprintf(stderr, "key_write failed"); |
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key_free(prv); |
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fprintf(stdout, "\n"); |
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exit(0); |
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} |
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void |
void |
do_change_comment(struct passwd *pw) |
do_fingerprint(struct passwd *pw) |
{ |
{ |
char new_comment[1024], *comment; |
FILE *f; |
RSA *private_key; |
Key *public; |
char *passphrase; |
char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
struct stat st; |
int i, skip = 0, num = 1, invalid = 1, rep, fptype; |
FILE *f; |
struct stat st; |
char *tmpbuf; |
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if (!have_identity) |
fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
ask_filename(pw, "Enter file in which the key is"); |
rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; |
/* Check if the file exists. */ |
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if (stat(identity_file, &st) < 0) |
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{ |
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perror(identity_file); |
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exit(1); |
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} |
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/* Try to load the public key from the file the verify that it is |
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readable and of the proper format. */ |
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public_key = RSA_new(); |
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if (!load_public_key(identity_file, public_key, NULL)) |
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{ |
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printf("%s is not a valid key file.\n", identity_file); |
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exit(1); |
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} |
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private_key = RSA_new(); |
if (!have_identity) |
/* Try to load the file with empty passphrase. */ |
ask_filename(pw, "Enter file in which the key is"); |
if (load_private_key(identity_file, "", private_key, &comment)) |
if (stat(identity_file, &st) < 0) { |
passphrase = xstrdup(""); |
perror(identity_file); |
else |
exit(1); |
{ |
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/* Read passphrase from the user. */ |
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if (identity_passphrase) |
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passphrase = xstrdup(identity_passphrase); |
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else |
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if (identity_new_passphrase) |
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passphrase = xstrdup(identity_new_passphrase); |
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else |
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passphrase = read_passphrase("Enter passphrase: ", 1); |
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/* Try to load using the passphrase. */ |
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if (!load_private_key(identity_file, passphrase, private_key, &comment)) |
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{ |
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memset(passphrase, 0, strlen(passphrase)); |
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xfree(passphrase); |
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printf("Bad passphrase.\n"); |
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exit(1); |
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} |
} |
} |
public = key_load_public(identity_file, &comment); |
printf("Key now has comment '%s'\n", comment); |
if (public != NULL) { |
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fp = key_fingerprint(public, fptype, rep); |
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printf("%d %s %s\n", key_size(public), fp, comment); |
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key_free(public); |
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xfree(comment); |
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xfree(fp); |
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exit(0); |
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} |
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if (comment) |
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xfree(comment); |
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if (identity_comment) |
f = fopen(identity_file, "r"); |
{ |
if (f != NULL) { |
strlcpy(new_comment, identity_comment, sizeof(new_comment)); |
while (fgets(line, sizeof(line), f)) { |
} |
i = strlen(line) - 1; |
else |
if (line[i] != '\n') { |
{ |
error("line %d too long: %.40s...", num, line); |
printf("Enter new comment: "); |
skip = 1; |
fflush(stdout); |
continue; |
if (!fgets(new_comment, sizeof(new_comment), stdin)) |
} |
{ |
num++; |
memset(passphrase, 0, strlen(passphrase)); |
if (skip) { |
RSA_free(private_key); |
skip = 0; |
exit(1); |
continue; |
|
} |
|
line[i] = '\0'; |
|
|
|
/* Skip leading whitespace, empty and comment lines. */ |
|
for (cp = line; *cp == ' ' || *cp == '\t'; cp++) |
|
; |
|
if (!*cp || *cp == '\n' || *cp == '#') |
|
continue ; |
|
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'; |
|
} |
|
ep = cp; |
|
public = key_new(KEY_RSA1); |
|
if (key_read(public, &cp) != 1) { |
|
cp = ep; |
|
key_free(public); |
|
public = key_new(KEY_UNSPEC); |
|
if (key_read(public, &cp) != 1) { |
|
key_free(public); |
|
continue; |
|
} |
|
} |
|
comment = *cp ? cp : comment; |
|
fp = key_fingerprint(public, fptype, rep); |
|
printf("%d %s %s\n", key_size(public), fp, |
|
comment ? comment : "no comment"); |
|
xfree(fp); |
|
key_free(public); |
|
invalid = 0; |
|
} |
|
fclose(f); |
} |
} |
|
if (invalid) { |
/* Remove terminating newline from comment. */ |
printf("%s is not a valid key file.\n", identity_file); |
if (strchr(new_comment, '\n')) |
exit(1); |
*strchr(new_comment, '\n') = 0; |
} |
} |
exit(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. */ |
/* |
memset(passphrase, 0, strlen(passphrase)); |
* Perform changing a passphrase. The argument is the passwd structure |
xfree(passphrase); |
* for the current user. |
RSA_free(private_key); |
*/ |
|
void |
|
do_change_passphrase(struct passwd *pw) |
|
{ |
|
char *comment; |
|
char *old_passphrase, *passphrase1, *passphrase2; |
|
struct stat st; |
|
Key *private; |
|
|
/* Save the public key in text format in a file with the same name but |
if (!have_identity) |
.pub appended. */ |
ask_filename(pw, "Enter file in which the key is"); |
strlcat(identity_file, ".pub", sizeof(identity_file)); |
if (stat(identity_file, &st) < 0) { |
f = fopen(identity_file, "w"); |
perror(identity_file); |
if (!f) |
exit(1); |
{ |
} |
printf("Could not save your public key in %s\n", identity_file); |
/* Try to load the file with empty passphrase. */ |
exit(1); |
private = key_load_private(identity_file, "", &comment); |
} |
if (private == NULL) { |
fprintf(f, "%d ", BN_num_bits(public_key->n)); |
if (identity_passphrase) |
tmpbuf = BN_bn2dec(public_key->e); |
old_passphrase = xstrdup(identity_passphrase); |
fprintf(f, "%s ", tmpbuf); |
else |
free (tmpbuf); |
old_passphrase = read_passphrase("Enter old passphrase: ", 1); |
tmpbuf = BN_bn2dec(public_key->n); |
private = key_load_private(identity_file, old_passphrase , &comment); |
fprintf(f, "%s %s\n", tmpbuf, new_comment); |
memset(old_passphrase, 0, strlen(old_passphrase)); |
free (tmpbuf); |
xfree(old_passphrase); |
fclose(f); |
if (private == NULL) { |
|
printf("Bad passphrase.\n"); |
|
exit(1); |
|
} |
|
} |
|
printf("Key has comment '%s'\n", comment); |
|
|
xfree(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); |
|
|
printf("The comment in your key file has been changed.\n"); |
/* Verify that they are the same. */ |
exit(0); |
if (strcmp(passphrase1, passphrase2) != 0) { |
|
memset(passphrase1, 0, strlen(passphrase1)); |
|
memset(passphrase2, 0, strlen(passphrase2)); |
|
xfree(passphrase1); |
|
xfree(passphrase2); |
|
printf("Pass phrases do not match. Try again.\n"); |
|
exit(1); |
|
} |
|
/* Destroy the other copy. */ |
|
memset(passphrase2, 0, strlen(passphrase2)); |
|
xfree(passphrase2); |
|
} |
|
|
|
/* Save the file using the new passphrase. */ |
|
if (!key_save_private(private, identity_file, passphrase1, comment)) { |
|
printf("Saving the key failed: %s: %s.\n", |
|
identity_file, strerror(errno)); |
|
memset(passphrase1, 0, strlen(passphrase1)); |
|
xfree(passphrase1); |
|
key_free(private); |
|
xfree(comment); |
|
exit(1); |
|
} |
|
/* Destroy the passphrase and the copy of the key in memory. */ |
|
memset(passphrase1, 0, strlen(passphrase1)); |
|
xfree(passphrase1); |
|
key_free(private); /* Destroys contents */ |
|
xfree(comment); |
|
|
|
printf("Your identification has been saved with the new passphrase.\n"); |
|
exit(0); |
} |
} |
|
|
|
/* |
|
* Change the comment of a private key file. |
|
*/ |
void |
void |
|
do_change_comment(struct passwd *pw) |
|
{ |
|
char new_comment[1024], *comment, *passphrase; |
|
Key *private; |
|
Key *public; |
|
struct stat st; |
|
FILE *f; |
|
int fd; |
|
|
|
if (!have_identity) |
|
ask_filename(pw, "Enter file in which the key is"); |
|
if (stat(identity_file, &st) < 0) { |
|
perror(identity_file); |
|
exit(1); |
|
} |
|
private = key_load_private(identity_file, "", &comment); |
|
if (private == NULL) { |
|
if (identity_passphrase) |
|
passphrase = xstrdup(identity_passphrase); |
|
else if (identity_new_passphrase) |
|
passphrase = xstrdup(identity_new_passphrase); |
|
else |
|
passphrase = read_passphrase("Enter passphrase: ", 1); |
|
/* Try to load using the passphrase. */ |
|
private = key_load_private(identity_file, passphrase, &comment); |
|
if (private == NULL) { |
|
memset(passphrase, 0, strlen(passphrase)); |
|
xfree(passphrase); |
|
printf("Bad passphrase.\n"); |
|
exit(1); |
|
} |
|
} else { |
|
passphrase = xstrdup(""); |
|
} |
|
if (private->type != KEY_RSA1) { |
|
fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); |
|
key_free(private); |
|
exit(1); |
|
} |
|
printf("Key now has comment '%s'\n", comment); |
|
|
|
if (identity_comment) { |
|
strlcpy(new_comment, identity_comment, sizeof(new_comment)); |
|
} else { |
|
printf("Enter new comment: "); |
|
fflush(stdout); |
|
if (!fgets(new_comment, sizeof(new_comment), stdin)) { |
|
memset(passphrase, 0, strlen(passphrase)); |
|
key_free(private); |
|
exit(1); |
|
} |
|
if (strchr(new_comment, '\n')) |
|
*strchr(new_comment, '\n') = 0; |
|
} |
|
|
|
/* Save the file using the new passphrase. */ |
|
if (!key_save_private(private, identity_file, passphrase, new_comment)) { |
|
printf("Saving the key failed: %s: %s.\n", |
|
identity_file, strerror(errno)); |
|
memset(passphrase, 0, strlen(passphrase)); |
|
xfree(passphrase); |
|
key_free(private); |
|
xfree(comment); |
|
exit(1); |
|
} |
|
memset(passphrase, 0, strlen(passphrase)); |
|
xfree(passphrase); |
|
public = key_from_private(private); |
|
key_free(private); |
|
|
|
strlcat(identity_file, ".pub", sizeof(identity_file)); |
|
fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
|
if (fd == -1) { |
|
printf("Could not save your public key in %s\n", identity_file); |
|
exit(1); |
|
} |
|
f = fdopen(fd, "w"); |
|
if (f == NULL) { |
|
printf("fdopen %s failed", identity_file); |
|
exit(1); |
|
} |
|
if (!key_write(public, f)) |
|
fprintf(stderr, "write key failed"); |
|
key_free(public); |
|
fprintf(f, " %s\n", new_comment); |
|
fclose(f); |
|
|
|
xfree(comment); |
|
|
|
printf("The comment in your key file has been changed.\n"); |
|
exit(0); |
|
} |
|
|
|
void |
usage(void) |
usage(void) |
{ |
{ |
printf("ssh-keygen version %s\n", SSH_VERSION); |
printf("Usage: %s [-lBpqxXyc] [-t type] [-b bits] [-f file] [-C comment] " |
printf("Usage: %s [-b bits] [-p] [-c] [-f file] [-P pass] [-N new-pass] [-C comment]\n", __progname); |
"[-N new-pass] [-P pass]\n", __progname); |
exit(1); |
exit(1); |
} |
} |
|
|
/* Main program for key management. */ |
/* |
|
* Main program for key management. |
|
*/ |
int |
int |
main(int ac, char **av) |
main(int ac, char **av) |
{ |
{ |
char buf[16384], buf2[1024], *passphrase1, *passphrase2; |
char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
struct passwd *pw; |
Key *private, *public; |
char *tmpbuf; |
struct passwd *pw; |
int opt; |
int opt, type, fd; |
struct stat st; |
struct stat st; |
FILE *f; |
FILE *f; |
char hostname[MAXHOSTNAMELEN]; |
|
extern int optind; |
|
extern char *optarg; |
|
|
|
/* check if RSA support exists */ |
extern int optind; |
if (rsa_alive() == 0) { |
extern char *optarg; |
extern char *__progname; |
|
|
|
fprintf(stderr, |
SSLeay_add_all_algorithms(); |
"%s: no RSA support in libssl and libcrypto. See ssl(8).\n", |
|
__progname); |
|
exit(1); |
|
} |
|
|
|
/* Get user\'s passwd structure. We need this for the home directory. */ |
/* we need this for the home * directory. */ |
pw = getpwuid(getuid()); |
pw = getpwuid(getuid()); |
if (!pw) |
if (!pw) { |
{ |
printf("You don't exist, go away!\n"); |
printf("You don't exist, go away!\n"); |
exit(1); |
exit(1); |
} |
} |
if (gethostname(hostname, sizeof(hostname)) < 0) { |
|
perror("gethostname"); |
|
exit(1); |
|
} |
|
|
/* Create ~/.ssh directory if it doesn\'t already exist. */ |
while ((opt = getopt(ac, av, "dqpclBRxXyb:f:t:P:N:C:")) != -1) { |
snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_USER_DIR); |
switch (opt) { |
if (stat(buf, &st) < 0) |
case 'b': |
if (mkdir(buf, 0755) < 0) |
bits = atoi(optarg); |
error("Could not create directory '%s'.", buf); |
if (bits < 512 || bits > 32768) { |
|
printf("Bits has bad value.\n"); |
|
exit(1); |
|
} |
|
break; |
|
|
/* Parse command line arguments. */ |
case 'l': |
while ((opt = getopt(ac, av, "qpclb:f:P:N:C:")) != EOF) |
print_fingerprint = 1; |
{ |
break; |
switch (opt) |
|
{ |
|
case 'b': |
|
bits = atoi(optarg); |
|
if (bits < 512 || bits > 32768) |
|
{ |
|
printf("Bits has bad value.\n"); |
|
exit(1); |
|
} |
|
break; |
|
|
|
case 'l': |
case 'B': |
print_fingerprint = 1; |
print_bubblebabble = 1; |
break; |
break; |
|
|
case 'p': |
case 'p': |
change_passphrase = 1; |
change_passphrase = 1; |
break; |
break; |
|
|
case 'c': |
case 'c': |
change_comment = 1; |
change_comment = 1; |
break; |
break; |
|
|
case 'f': |
case 'f': |
strlcpy(identity_file, optarg, sizeof(identity_file)); |
strlcpy(identity_file, optarg, sizeof(identity_file)); |
have_identity = 1; |
have_identity = 1; |
break; |
break; |
|
|
case 'P': |
|
identity_passphrase = optarg; |
|
break; |
|
|
|
case 'N': |
case 'P': |
identity_new_passphrase = optarg; |
identity_passphrase = optarg; |
break; |
break; |
|
|
case 'C': |
case 'N': |
identity_comment = optarg; |
identity_new_passphrase = optarg; |
break; |
break; |
|
|
case 'q': |
case 'C': |
quiet = 1; |
identity_comment = optarg; |
break; |
break; |
|
|
case '?': |
case 'q': |
default: |
quiet = 1; |
usage(); |
break; |
} |
|
} |
|
if (optind < ac) |
|
{ |
|
printf("Too many arguments.\n"); |
|
usage(); |
|
} |
|
if (change_passphrase && change_comment) |
|
{ |
|
printf("Can only have one of -p and -c.\n"); |
|
usage(); |
|
} |
|
|
|
if (print_fingerprint) |
case 'R': |
do_fingerprint(pw); |
/* unused */ |
|
exit(0); |
|
break; |
|
|
/* If the user requested to change the passphrase, do it now. This |
case 'x': |
function never returns. */ |
convert_to_ssh2 = 1; |
if (change_passphrase) |
break; |
do_change_passphrase(pw); |
|
|
|
/* If the user requested to change the comment, do it now. This function |
case 'X': |
never returns. */ |
convert_from_ssh2 = 1; |
if (change_comment) |
break; |
do_change_comment(pw); |
|
|
|
arc4random_stir(); |
case 'y': |
|
print_public = 1; |
|
break; |
|
|
if (quiet) |
case 'd': |
rsa_set_verbose(0); |
key_type_name = "dsa"; |
|
break; |
|
|
/* Generate the rsa key pair. */ |
case 't': |
private_key = RSA_new(); |
key_type_name = optarg; |
public_key = RSA_new(); |
break; |
rsa_generate_key(private_key, public_key, bits); |
|
|
|
if (!have_identity) |
case '?': |
ask_filename(pw, "Enter file in which to save the key"); |
default: |
|
usage(); |
|
} |
|
} |
|
if (optind < ac) { |
|
printf("Too many arguments.\n"); |
|
usage(); |
|
} |
|
if (change_passphrase && change_comment) { |
|
printf("Can only have one of -p and -c.\n"); |
|
usage(); |
|
} |
|
if (print_fingerprint || print_bubblebabble) |
|
do_fingerprint(pw); |
|
if (change_passphrase) |
|
do_change_passphrase(pw); |
|
if (change_comment) |
|
do_change_comment(pw); |
|
if (convert_to_ssh2) |
|
do_convert_to_ssh2(pw); |
|
if (convert_from_ssh2) |
|
do_convert_from_ssh2(pw); |
|
if (print_public) |
|
do_print_public(pw); |
|
|
/* If the file aready exists, ask the user to confirm. */ |
arc4random_stir(); |
if (stat(identity_file, &st) >= 0) |
|
{ |
|
printf("%s already exists.\n", identity_file); |
|
printf("Overwrite (y/n)? "); |
|
fflush(stdout); |
|
if (fgets(buf2, sizeof(buf2), stdin) == NULL) |
|
exit(1); |
|
if (buf2[0] != 'y' && buf2[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 |
type = key_type_from_name(key_type_name); |
edit this field. */ |
if (type == KEY_UNSPEC) { |
if (identity_comment) |
fprintf(stderr, "unknown key type %s\n", key_type_name); |
{ |
exit(1); |
strlcpy(buf2, identity_comment, sizeof(buf2)); |
|
} |
|
else |
|
{ |
|
if (gethostname(hostname, sizeof(hostname)) < 0) |
|
{ |
|
perror("gethostname"); |
|
exit(1); |
|
} |
} |
snprintf(buf2, sizeof buf2, "%s@%s", pw->pw_name, hostname); |
if (!quiet) |
} |
printf("Generating public/private %s key pair.\n", key_type_name); |
|
private = key_generate(type, bits); |
|
if (private == NULL) { |
|
fprintf(stderr, "key_generate failed"); |
|
exit(1); |
|
} |
|
public = key_from_private(private); |
|
|
/* Save the key with the given passphrase and comment. */ |
if (!have_identity) |
if (!save_private_key(identity_file, passphrase1, private_key, buf2)) |
ask_filename(pw, "Enter file in which to save the key"); |
{ |
|
printf("Saving the key failed: %s: %s.\n", |
|
identity_file, strerror(errno)); |
|
memset(passphrase1, 0, strlen(passphrase1)); |
|
xfree(passphrase1); |
|
exit(1); |
|
} |
|
/* Clear the passphrase. */ |
|
memset(passphrase1, 0, strlen(passphrase1)); |
|
xfree(passphrase1); |
|
|
|
/* Clear the private key and the random number generator. */ |
/* Create ~/.ssh directory if it doesn\'t already exist. */ |
RSA_free(private_key); |
snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
arc4random_stir(); |
if (strstr(identity_file, dotsshdir) != NULL && |
|
stat(dotsshdir, &st) < 0) { |
|
if (mkdir(dotsshdir, 0700) < 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. */ |
|
if (stat(identity_file, &st) >= 0) { |
|
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); |
|
} |
|
|
if (!quiet) |
if (identity_comment) { |
printf("Your identification has been saved in %s.\n", identity_file); |
strlcpy(comment, identity_comment, sizeof(comment)); |
|
} else { |
|
/* Create default commend field for the passphrase. */ |
|
snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
|
} |
|
|
/* Display the public key on the screen. */ |
/* Save the key with the given passphrase and comment. */ |
if (!quiet) { |
if (!key_save_private(private, identity_file, passphrase1, comment)) { |
printf("Your public key is:\n"); |
printf("Saving the key failed: %s: %s.\n", |
printf("%d ", BN_num_bits(public_key->n)); |
identity_file, strerror(errno)); |
tmpbuf = BN_bn2dec(public_key->e); |
memset(passphrase1, 0, strlen(passphrase1)); |
printf("%s ", tmpbuf); |
xfree(passphrase1); |
free(tmpbuf); |
exit(1); |
tmpbuf = BN_bn2dec(public_key->n); |
} |
printf("%s %s\n", tmpbuf, buf2); |
/* Clear the passphrase. */ |
free(tmpbuf); |
memset(passphrase1, 0, strlen(passphrase1)); |
} |
xfree(passphrase1); |
|
|
/* Save the public key in text format in a file with the same name but |
/* Clear the private key and the random number generator. */ |
.pub appended. */ |
key_free(private); |
strlcat(identity_file, ".pub", sizeof(identity_file)); |
arc4random_stir(); |
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, buf2); |
|
free(tmpbuf); |
|
fclose(f); |
|
|
|
if (!quiet) |
if (!quiet) |
printf("Your public key has been saved in %s\n", identity_file); |
printf("Your identification has been saved in %s.\n", identity_file); |
|
|
exit(0); |
strlcat(identity_file, ".pub", sizeof(identity_file)); |
|
fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
|
if (fd == -1) { |
|
printf("Could not save your public key in %s\n", identity_file); |
|
exit(1); |
|
} |
|
f = fdopen(fd, "w"); |
|
if (f == NULL) { |
|
printf("fdopen %s failed", identity_file); |
|
exit(1); |
|
} |
|
if (!key_write(public, f)) |
|
fprintf(stderr, "write key failed"); |
|
fprintf(f, " %s\n", comment); |
|
fclose(f); |
|
|
|
if (!quiet) { |
|
char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); |
|
printf("Your public key has been saved in %s.\n", |
|
identity_file); |
|
printf("The key fingerprint is:\n"); |
|
printf("%s %s\n", fp, comment); |
|
xfree(fp); |
|
} |
|
|
|
key_free(public); |
|
exit(0); |
} |
} |