version 1.1, 1999/09/26 20:53:37 |
version 1.26, 2000/05/30 17:32:06 |
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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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* 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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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("$Id$"); |
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#ifndef HAVE_GETHOSTNAME |
#include <openssl/evp.h> |
#include <sys/utsname.h> |
#include <openssl/pem.h> |
#endif |
#include <openssl/rsa.h> |
#include "randoms.h" |
#include <openssl/dsa.h> |
#include "rsa.h" |
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#include "ssh.h" |
#include "ssh.h" |
#include "xmalloc.h" |
#include "xmalloc.h" |
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#include "fingerprint.h" |
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#include "key.h" |
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#include "rsa.h" |
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#include "dsa.h" |
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#include "authfile.h" |
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#include "uuencode.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. */ |
RSAPrivateKey private_key; |
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/* Generated public key. */ |
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RSAPublicKey public_key; |
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/* Random number generator state. */ |
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RandomState state; |
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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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/* This is set to the identity file name if given on the command line. */ |
int quiet = 0; |
char *identity_file = NULL; |
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/* Flag indicating that we just want to see the key fingerprint */ |
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int print_fingerprint = 0; |
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/* The identity file name, given on the command line or entered by the user. */ |
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char identity_file[1024]; |
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int have_identity = 0; |
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/* This is set to the passphrase if given on the command line. */ |
/* This is set to the passphrase if given on the command line. */ |
char *identity_passphrase = NULL; |
char *identity_passphrase = NULL; |
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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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/* Perform changing a passphrase. The argument is the passwd structure |
/* Dump public key file in format used by real and the original SSH 2 */ |
for the current user. */ |
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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int dsa_mode = 0; |
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void do_change_passphrase(struct passwd *pw) |
/* argv0 */ |
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extern char *__progname; |
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char hostname[MAXHOSTNAMELEN]; |
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void |
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ask_filename(struct passwd *pw, const char *prompt) |
{ |
{ |
char buf[1024], *comment; |
char buf[1024]; |
RSAPrivateKey private_key; |
snprintf(identity_file, sizeof(identity_file), "%s/%s", |
char *old_passphrase, *passphrase1, *passphrase2; |
pw->pw_dir, |
struct stat st; |
dsa_mode ? SSH_CLIENT_ID_DSA: SSH_CLIENT_IDENTITY); |
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printf("%s (%s): ", prompt, identity_file); |
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fflush(stdout); |
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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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} |
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/* Read key file name. */ |
int |
if (identity_file != NULL) |
try_load_key(char *filename, Key *k) |
{ |
{ |
strncpy(buf, identity_file, sizeof(buf)); |
int success = 1; |
buf[sizeof(buf) - 1] = '\0'; |
if (!load_private_key(filename, "", k, NULL)) { |
} |
char *pass = read_passphrase("Enter passphrase: ", 1); |
else |
if (!load_private_key(filename, pass, k, NULL)) { |
{ |
success = 0; |
printf("Enter file in which the key is ($HOME/%s): ", |
} |
SSH_CLIENT_IDENTITY); |
memset(pass, 0, strlen(pass)); |
fflush(stdout); |
xfree(pass); |
if (fgets(buf, sizeof(buf), stdin) == NULL) |
} |
exit(1); |
return success; |
if (strchr(buf, '\n')) |
} |
*strchr(buf, '\n') = 0; |
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if (strcmp(buf, "") == 0) |
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sprintf(buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
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} |
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/* Check if the file exists. */ |
#define SSH_COM_MAGIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
if (stat(buf, &st) < 0) |
#define SSH_COM_MAGIC_END "---- END SSH2 PUBLIC KEY ----" |
{ |
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perror(buf); |
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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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if (!load_public_key(buf, &public_key, NULL)) |
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{ |
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printf("%s is not a valid key file.\n", buf); |
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exit(1); |
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} |
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/* Clear the public key since we are just about to load the whole file. */ |
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rsa_clear_public_key(&public_key); |
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/* Try to load the file with empty passphrase. */ |
void |
if (!load_private_key(buf, "", &private_key, &comment)) |
do_convert_to_ssh2(struct passwd *pw) |
{ |
{ |
/* Read passphrase from the user. */ |
Key *k; |
if (identity_passphrase) |
int len; |
old_passphrase = xstrdup(identity_passphrase); |
unsigned char *blob; |
else |
struct stat st; |
old_passphrase = read_passphrase("Enter old passphrase: ", 1); |
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/* Try to load using the passphrase. */ |
if (!have_identity) |
if (!load_private_key(buf, old_passphrase, &private_key, &comment)) |
ask_filename(pw, "Enter file in which the key is"); |
{ |
if (stat(identity_file, &st) < 0) { |
memset(old_passphrase, 0, strlen(old_passphrase)); |
perror(identity_file); |
xfree(old_passphrase); |
exit(1); |
printf("Bad passphrase.\n"); |
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exit(1); |
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} |
} |
/* Destroy the passphrase. */ |
k = key_new(KEY_DSA); |
memset(old_passphrase, 0, strlen(old_passphrase)); |
if (!try_load_key(identity_file, k)) { |
xfree(old_passphrase); |
fprintf(stderr, "load failed\n"); |
} |
exit(1); |
printf("Key has comment '%s'\n", comment); |
} |
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dsa_make_key_blob(k, &blob, &len); |
/* Ask the new passphrase (twice). */ |
fprintf(stdout, SSH_COM_MAGIC_BEGIN "\n"); |
if (identity_new_passphrase) |
fprintf(stdout, |
{ |
"Comment: \"%d-bit DSA, converted from openssh by %s@%s\"\n", |
passphrase1 = xstrdup(identity_new_passphrase); |
BN_num_bits(k->dsa->p), |
passphrase2 = NULL; |
pw->pw_name, hostname); |
} |
dump_base64(stdout, blob, len); |
else |
fprintf(stdout, SSH_COM_MAGIC_END "\n"); |
{ |
key_free(k); |
passphrase1 = |
xfree(blob); |
read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); |
exit(0); |
passphrase2 = read_passphrase("Enter same passphrase again: ", 1); |
} |
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/* Verify that they are the same. */ |
void |
if (strcmp(passphrase1, passphrase2) != 0) |
do_convert_from_ssh2(struct passwd *pw) |
{ |
{ |
memset(passphrase1, 0, strlen(passphrase1)); |
Key *k; |
memset(passphrase2, 0, strlen(passphrase2)); |
int blen; |
xfree(passphrase1); |
char line[1024], *p; |
xfree(passphrase2); |
char blob[8096]; |
printf("Pass phrases do not match. Try again.\n"); |
char encoded[8096]; |
exit(1); |
struct stat st; |
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int escaped = 0; |
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FILE *fp; |
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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); |
} |
} |
/* Destroy the other copy. */ |
fp = fopen(identity_file, "r"); |
memset(passphrase2, 0, strlen(passphrase2)); |
if (fp == NULL) { |
xfree(passphrase2); |
perror(identity_file); |
} |
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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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, (unsigned 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 = dsa_key_from_blob(blob, blen); |
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if (!key_write(k, stdout)) |
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fprintf(stderr, "key_write failed"); |
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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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} |
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/* Save the file using the new passphrase. */ |
void |
if (!save_private_key(buf, passphrase1, &private_key, comment, &state)) |
do_print_public(struct passwd *pw) |
{ |
{ |
printf("Saving the key failed: %s: %s.\n", |
Key *k; |
buf, strerror(errno)); |
int len; |
memset(passphrase1, 0, strlen(passphrase1)); |
unsigned char *blob; |
xfree(passphrase1); |
struct stat st; |
rsa_clear_private_key(&private_key); |
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xfree(comment); |
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exit(1); |
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} |
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/* 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_clear_private_key(&private_key); |
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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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k = key_new(KEY_DSA); |
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if (!try_load_key(identity_file, k)) { |
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fprintf(stderr, "load failed\n"); |
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exit(1); |
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} |
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dsa_make_key_blob(k, &blob, &len); |
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if (!key_write(k, stdout)) |
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fprintf(stderr, "key_write failed"); |
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key_free(k); |
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xfree(blob); |
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fprintf(stdout, "\n"); |
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exit(0); |
} |
} |
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/* Change the comment of a private key file. */ |
void |
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do_fingerprint(struct passwd *pw) |
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{ |
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FILE *f; |
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BIGNUM *e, *n; |
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Key *public; |
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char *comment = NULL, *cp, *ep, line[16*1024]; |
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int i, skip = 0, num = 1, invalid = 1; |
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unsigned int ignore; |
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struct stat st; |
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void do_change_comment(struct passwd *pw) |
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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public = key_new(KEY_RSA); |
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if (load_public_key(identity_file, public, &comment)) { |
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printf("%d %s %s\n", BN_num_bits(public->rsa->n), |
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key_fingerprint(public), comment); |
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key_free(public); |
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exit(0); |
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} |
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key_free(public); |
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/* XXX */ |
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f = fopen(identity_file, "r"); |
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if (f != NULL) { |
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n = BN_new(); |
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e = BN_new(); |
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while (fgets(line, sizeof(line), f)) { |
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i = strlen(line) - 1; |
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if (line[i] != '\n') { |
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error("line %d too long: %.40s...", num, line); |
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skip = 1; |
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continue; |
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} |
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num++; |
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if (skip) { |
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skip = 0; |
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continue; |
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} |
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line[i] = '\0'; |
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/* Skip leading whitespace, empty and comment lines. */ |
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for (cp = line; *cp == ' ' || *cp == '\t'; cp++) |
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; |
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if (!*cp || *cp == '\n' || *cp == '#') |
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continue ; |
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i = strtol(cp, &ep, 10); |
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if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { |
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int quoted = 0; |
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comment = cp; |
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for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { |
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if (*cp == '\\' && cp[1] == '"') |
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cp++; /* Skip both */ |
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else if (*cp == '"') |
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quoted = !quoted; |
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} |
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if (!*cp) |
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continue; |
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*cp++ = '\0'; |
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} |
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ep = cp; |
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if (auth_rsa_read_key(&cp, &ignore, e, n)) { |
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invalid = 0; |
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comment = *cp ? cp : comment; |
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printf("%d %s %s\n", BN_num_bits(n), |
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fingerprint(e, n), |
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comment ? comment : "no comment"); |
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} |
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} |
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BN_free(e); |
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BN_free(n); |
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fclose(f); |
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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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exit(1); |
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} |
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exit(0); |
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} |
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/* |
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* Perform changing a passphrase. The argument is the passwd structure |
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* for the current user. |
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*/ |
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void |
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do_change_passphrase(struct passwd *pw) |
{ |
{ |
char buf[1024], new_comment[1024], *comment; |
char *comment; |
RSAPrivateKey private_key; |
char *old_passphrase, *passphrase1, *passphrase2; |
char *passphrase; |
struct stat st; |
struct stat st; |
Key *private; |
FILE *f; |
Key *public; |
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int type = dsa_mode ? KEY_DSA : KEY_RSA; |
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/* Read key file name. */ |
if (!have_identity) |
if (identity_file) |
ask_filename(pw, "Enter file in which the key is"); |
{ |
if (stat(identity_file, &st) < 0) { |
strncpy(buf, identity_file, sizeof(buf)); |
perror(identity_file); |
buf[sizeof(buf) - 1] = '\0'; |
exit(1); |
} |
} |
else |
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{ |
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printf("Enter file in which the key is ($HOME/%s): ", |
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SSH_CLIENT_IDENTITY); |
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fflush(stdout); |
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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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sprintf(buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
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} |
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/* Check if the file exists. */ |
if (type == KEY_RSA) { |
if (stat(buf, &st) < 0) |
/* XXX this works currently only for RSA */ |
{ |
public = key_new(type); |
perror(buf); |
if (!load_public_key(identity_file, public, NULL)) { |
exit(1); |
printf("%s is not a valid key file.\n", identity_file); |
} |
exit(1); |
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} |
/* Try to load the public key from the file the verify that it is |
/* Clear the public key since we are just about to load the whole file. */ |
readable and of the proper format. */ |
key_free(public); |
if (!load_public_key(buf, &public_key, NULL)) |
} |
{ |
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printf("%s is not a valid key file.\n", buf); |
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exit(1); |
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} |
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/* Try to load the file with empty passphrase. */ |
/* Try to load the file with empty passphrase. */ |
if (load_private_key(buf, "", &private_key, &comment)) |
private = key_new(type); |
passphrase = xstrdup(""); |
if (!load_private_key(identity_file, "", private, &comment)) { |
else |
if (identity_passphrase) |
{ |
old_passphrase = xstrdup(identity_passphrase); |
/* Read passphrase from the user. */ |
else |
if (identity_passphrase) |
old_passphrase = read_passphrase("Enter old passphrase: ", 1); |
passphrase = xstrdup(identity_passphrase); |
if (!load_private_key(identity_file, old_passphrase, private, &comment)) { |
else |
memset(old_passphrase, 0, strlen(old_passphrase)); |
if (identity_new_passphrase) |
xfree(old_passphrase); |
passphrase = xstrdup(identity_new_passphrase); |
printf("Bad passphrase.\n"); |
else |
exit(1); |
passphrase = read_passphrase("Enter passphrase: ", 1); |
} |
/* Try to load using the passphrase. */ |
memset(old_passphrase, 0, strlen(old_passphrase)); |
if (!load_private_key(buf, passphrase, &private_key, &comment)) |
xfree(old_passphrase); |
{ |
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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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} |
} |
} |
printf("Key has comment '%s'\n", comment); |
printf("Key now has comment '%s'\n", comment); |
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if (identity_comment) |
/* Ask the new passphrase (twice). */ |
{ |
if (identity_new_passphrase) { |
strncpy(new_comment, identity_comment, sizeof(new_comment)); |
passphrase1 = xstrdup(identity_new_passphrase); |
new_comment[sizeof(new_comment) - 1] = '\0'; |
passphrase2 = NULL; |
} |
} else { |
else |
passphrase1 = |
{ |
read_passphrase("Enter new passphrase (empty for no passphrase): ", 1); |
printf("Enter new comment: "); |
passphrase2 = read_passphrase("Enter same passphrase again: ", 1); |
fflush(stdout); |
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if (!fgets(new_comment, sizeof(new_comment), stdin)) |
/* Verify that they are the same. */ |
{ |
if (strcmp(passphrase1, passphrase2) != 0) { |
memset(passphrase, 0, strlen(passphrase)); |
memset(passphrase1, 0, strlen(passphrase1)); |
rsa_clear_private_key(&private_key); |
memset(passphrase2, 0, strlen(passphrase2)); |
exit(1); |
xfree(passphrase1); |
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xfree(passphrase2); |
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printf("Pass phrases do not match. Try again.\n"); |
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exit(1); |
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} |
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/* Destroy the other copy. */ |
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memset(passphrase2, 0, strlen(passphrase2)); |
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xfree(passphrase2); |
} |
} |
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/* Remove terminating newline from comment. */ |
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if (strchr(new_comment, '\n')) |
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*strchr(new_comment, '\n') = 0; |
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} |
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/* Save the file using the new passphrase. */ |
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if (!save_private_key(buf, passphrase, &private_key, new_comment, |
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&state)) |
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{ |
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printf("Saving the key failed: %s: %s.\n", |
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buf, strerror(errno)); |
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memset(passphrase, 0, strlen(passphrase)); |
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xfree(passphrase); |
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rsa_clear_private_key(&private_key); |
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xfree(comment); |
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exit(1); |
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} |
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/* Destroy the passphrase and the private key in memory. */ |
/* Save the file using the new passphrase. */ |
memset(passphrase, 0, strlen(passphrase)); |
if (!save_private_key(identity_file, passphrase1, private, comment)) { |
xfree(passphrase); |
printf("Saving the key failed: %s: %s.\n", |
rsa_clear_private_key(&private_key); |
identity_file, strerror(errno)); |
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memset(passphrase1, 0, strlen(passphrase1)); |
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xfree(passphrase1); |
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key_free(private); |
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xfree(comment); |
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exit(1); |
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} |
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/* 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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key_free(private); /* Destroys contents */ |
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xfree(comment); |
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/* Save the public key in text format in a file with the same name but |
printf("Your identification has been saved with the new passphrase.\n"); |
.pub appended. */ |
exit(0); |
strcat(buf, ".pub"); |
} |
f = fopen(buf, "w"); |
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if (!f) |
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{ |
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printf("Could not save your public key in %s\n", buf); |
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exit(1); |
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} |
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fprintf(f, "%d ", public_key.bits); |
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mpz_out_str(f, 10, &public_key.e); |
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fprintf(f, " "); |
|
mpz_out_str(f, 10, &public_key.n); |
|
fprintf(f, " %s\n", new_comment); |
|
fclose(f); |
|
|
|
xfree(comment); |
/* |
|
* Change the comment of a private key file. |
|
*/ |
|
void |
|
do_change_comment(struct passwd *pw) |
|
{ |
|
char new_comment[1024], *comment; |
|
Key *private; |
|
Key *public; |
|
char *passphrase; |
|
struct stat st; |
|
FILE *f; |
|
|
printf("The comment in your key file has been changed.\n"); |
if (!have_identity) |
exit(0); |
ask_filename(pw, "Enter file in which the key is"); |
|
if (stat(identity_file, &st) < 0) { |
|
perror(identity_file); |
|
exit(1); |
|
} |
|
/* |
|
* Try to load the public key from the file the verify that it is |
|
* readable and of the proper format. |
|
*/ |
|
public = key_new(KEY_RSA); |
|
if (!load_public_key(identity_file, public, NULL)) { |
|
printf("%s is not a valid key file.\n", identity_file); |
|
exit(1); |
|
} |
|
|
|
private = key_new(KEY_RSA); |
|
if (load_private_key(identity_file, "", private, &comment)) |
|
passphrase = xstrdup(""); |
|
else { |
|
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. */ |
|
if (!load_private_key(identity_file, passphrase, private, &comment)) { |
|
memset(passphrase, 0, strlen(passphrase)); |
|
xfree(passphrase); |
|
printf("Bad passphrase.\n"); |
|
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 (!save_private_key(identity_file, passphrase, private, 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); |
|
key_free(private); |
|
|
|
strlcat(identity_file, ".pub", sizeof(identity_file)); |
|
f = fopen(identity_file, "w"); |
|
if (!f) { |
|
printf("Could not save your public key in %s\n", identity_file); |
|
exit(1); |
|
} |
|
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); |
} |
} |
|
|
/* Main program for key management. */ |
void |
|
usage(void) |
|
{ |
|
printf("Usage: %s [-lpqxXydc] [-b bits] [-f file] [-C comment] [-N new-pass] [-P pass]\n", __progname); |
|
exit(1); |
|
} |
|
|
int main(int ac, char **av) |
/* |
|
* Main program for key management. |
|
*/ |
|
int |
|
main(int ac, char **av) |
{ |
{ |
char buf[16384], buf2[1024], *passphrase1, *passphrase2; |
char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2; |
struct passwd *pw; |
struct passwd *pw; |
int opt; |
int opt; |
struct stat st; |
struct stat st; |
FILE *f; |
FILE *f; |
#ifdef HAVE_GETHOSTNAME |
Key *private; |
char hostname[257]; |
Key *public; |
#else |
extern int optind; |
struct utsname uts; |
extern char *optarg; |
#endif |
|
extern int optind; |
|
extern char *optarg; |
|
|
|
/* Get user\'s passwd structure. We need this for the home directory. */ |
SSLeay_add_all_algorithms(); |
pw = getpwuid(getuid()); |
|
if (!pw) |
|
{ |
|
printf("You don't exist, go away!\n"); |
|
exit(1); |
|
} |
|
|
|
/* Create ~/.ssh directory if it doesn\'t already exist. */ |
/* we need this for the home * directory. */ |
sprintf(buf, "%s/%s", pw->pw_dir, SSH_USER_DIR); |
pw = getpwuid(getuid()); |
if (stat(buf, &st) < 0) |
if (!pw) { |
if (mkdir(buf, 0755) < 0) |
printf("You don't exist, go away!\n"); |
error("Could not create directory '%s'.", buf); |
exit(1); |
|
} |
|
if (gethostname(hostname, sizeof(hostname)) < 0) { |
|
perror("gethostname"); |
|
exit(1); |
|
} |
|
|
/* Parse command line arguments. */ |
while ((opt = getopt(ac, av, "dqpclRxXyb:f:P:N:C:")) != EOF) { |
while ((opt = getopt(ac, av, "pcb:f:P:N:C:")) != EOF) |
switch (opt) { |
{ |
case 'b': |
switch (opt) |
bits = atoi(optarg); |
{ |
if (bits < 512 || bits > 32768) { |
case 'b': |
printf("Bits has bad value.\n"); |
bits = atoi(optarg); |
exit(1); |
if (bits < 512 || bits > 32768) |
} |
{ |
break; |
printf("Bits has bad value.\n"); |
|
exit(1); |
|
} |
|
break; |
|
|
|
case 'p': |
case 'l': |
change_passphrase = 1; |
print_fingerprint = 1; |
break; |
break; |
|
|
case 'c': |
case 'p': |
change_comment = 1; |
change_passphrase = 1; |
break; |
break; |
|
|
case 'f': |
case 'c': |
identity_file = optarg; |
change_comment = 1; |
break; |
break; |
|
|
case 'P': |
|
identity_passphrase = optarg; |
|
break; |
|
|
|
case 'N': |
case 'f': |
identity_new_passphrase = optarg; |
strlcpy(identity_file, optarg, sizeof(identity_file)); |
break; |
have_identity = 1; |
|
break; |
|
|
case 'C': |
case 'P': |
identity_comment = optarg; |
identity_passphrase = optarg; |
break; |
break; |
|
|
case '?': |
case 'N': |
default: |
identity_new_passphrase = optarg; |
printf("ssh-keygen version %s\n", SSH_VERSION); |
break; |
printf("Usage: %s [-b bits] [-p] [-c] [-f file] [-P pass] [-N new-pass] [-C comment]\n", av[0]); |
|
exit(1); |
|
} |
|
} |
|
if (optind < ac) |
|
{ |
|
printf("Too many arguments.\n"); |
|
exit(1); |
|
} |
|
if (change_passphrase && change_comment) |
|
{ |
|
printf("Can only have one of -p and -c.\n"); |
|
exit(1); |
|
} |
|
|
|
/* If the user requested to change the passphrase, do it now. This |
case 'C': |
function never returns. */ |
identity_comment = optarg; |
if (change_passphrase) |
break; |
do_change_passphrase(pw); |
|
|
|
/* If the user requested to change the comment, do it now. This function |
case 'q': |
never returns. */ |
quiet = 1; |
if (change_comment) |
break; |
do_change_comment(pw); |
|
|
|
/* Initialize random number generator. This may take a while if the |
case 'R': |
user has no seed file, so display a message to the user. */ |
if (rsa_alive() == 0) |
printf("Initializing random number generator...\n"); |
exit(1); |
sprintf(buf, "%s/%s", pw->pw_dir, SSH_CLIENT_SEEDFILE); |
else |
random_initialize(&state, buf); |
exit(0); |
|
break; |
|
|
/* Save random seed so we don\'t need to do all that time-consuming |
case 'x': |
environmental noise collection the next time. */ |
convert_to_ssh2 = 1; |
random_save(&state, buf); |
break; |
|
|
/* Generate the rsa key pair. */ |
case 'X': |
rsa_generate_key(&private_key, &public_key, &state, bits); |
convert_from_ssh2 = 1; |
|
break; |
|
|
/* Save the state again, just to remove any fear that the previous state |
case 'y': |
could be used to recreate the key. (That should not be possible anyway |
print_public = 1; |
since the pool is stirred after save and some noise is added.) */ |
break; |
random_save(&state, buf); |
|
|
|
ask_file_again: |
case 'd': |
|
dsa_mode = 1; |
|
break; |
|
|
/* Ask for a file to save the key in. */ |
case '?': |
if (identity_file) |
default: |
{ |
usage(); |
strncpy(buf, identity_file, sizeof(buf)); |
} |
buf[sizeof(buf) - 1] = '\0'; |
} |
} |
if (optind < ac) { |
else |
printf("Too many arguments.\n"); |
{ |
usage(); |
printf("Enter file in which to save the key ($HOME/%s): ", |
} |
SSH_CLIENT_IDENTITY); |
if (change_passphrase && change_comment) { |
fflush(stdout); |
printf("Can only have one of -p and -c.\n"); |
if (fgets(buf, sizeof(buf), stdin) == NULL) |
usage(); |
exit(1); |
} |
if (strchr(buf, '\n')) |
/* check if RSA support is needed and exists */ |
*strchr(buf, '\n') = 0; |
if (dsa_mode == 0 && rsa_alive() == 0) { |
if (strcmp(buf, "") == 0) |
fprintf(stderr, |
sprintf(buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
"%s: no RSA support in libssl and libcrypto. See ssl(8).\n", |
} |
__progname); |
|
exit(1); |
|
} |
|
if (print_fingerprint) |
|
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(buf, &st) >= 0) |
|
{ |
|
printf("%s already exists.\n", buf); |
|
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 |
if (dsa_mode != 0) { |
edit this field. */ |
if (!quiet) |
if (identity_comment) |
printf("Generating DSA parameter and key.\n"); |
{ |
public = private = dsa_generate_key(bits); |
strncpy(buf2, identity_comment, sizeof(buf2)); |
if (private == NULL) { |
buf2[sizeof(buf2) - 1] = '\0'; |
fprintf(stderr, "dsa_generate_keys failed"); |
} |
exit(1); |
else |
} |
{ |
} else { |
#ifdef HAVE_GETHOSTNAME |
if (quiet) |
if (gethostname(hostname, sizeof(hostname)) < 0) |
rsa_set_verbose(0); |
{ |
/* Generate the rsa key pair. */ |
perror("gethostname"); |
public = key_new(KEY_RSA); |
exit(1); |
private = key_new(KEY_RSA); |
|
rsa_generate_key(private->rsa, public->rsa, bits); |
} |
} |
sprintf(buf2, "%s@%s", pw->pw_name, hostname); |
|
#else |
if (!have_identity) |
if (uname(&uts) < 0) |
ask_filename(pw, "Enter file in which to save the key"); |
{ |
|
perror("uname"); |
/* Create ~/.ssh directory if it doesn\'t already exist. */ |
exit(1); |
snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, SSH_USER_DIR); |
|
if (strstr(identity_file, dotsshdir) != NULL && |
|
stat(dotsshdir, &st) < 0) { |
|
if (mkdir(dotsshdir, 0755) < 0) |
|
error("Could not create directory '%s'.", dotsshdir); |
|
else if (!quiet) |
|
printf("Created directory '%s'.\n", dotsshdir); |
} |
} |
sprintf(buf2, "%s@%s", pw->pw_name, uts.nodename); |
/* If the file already exists, ask the user to confirm. */ |
#endif |
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); |
|
} |
|
|
/* Save the key with the given passphrase and comment. */ |
if (identity_comment) { |
if (!save_private_key(buf, passphrase1, &private_key, buf2, &state)) |
strlcpy(comment, identity_comment, sizeof(comment)); |
{ |
} else { |
printf("Saving the key failed: %s: %s.\n", |
/* Create default commend field for the passphrase. */ |
buf, strerror(errno)); |
snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
memset(passphrase1, 0, strlen(passphrase1)); |
} |
xfree(passphrase1); |
|
goto ask_file_again; |
|
} |
|
/* Clear the passphrase. */ |
|
memset(passphrase1, 0, strlen(passphrase1)); |
|
xfree(passphrase1); |
|
|
|
/* Clear the private key and the random number generator. */ |
/* Save the key with the given passphrase and comment. */ |
rsa_clear_private_key(&private_key); |
if (!save_private_key(identity_file, passphrase1, private, comment)) { |
random_clear(&state); |
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); |
|
|
printf("Your identification has been saved in %s.\n", buf); |
/* Clear the private key and the random number generator. */ |
|
if (private != public) { |
|
key_free(private); |
|
} |
|
arc4random_stir(); |
|
|
/* Display the public key on the screen. */ |
if (!quiet) |
printf("Your public key is:\n"); |
printf("Your identification has been saved in %s.\n", identity_file); |
printf("%d ", public_key.bits); |
|
mpz_out_str(stdout, 10, &public_key.e); |
|
printf(" "); |
|
mpz_out_str(stdout, 10, &public_key.n); |
|
printf(" %s\n", buf2); |
|
|
|
/* Save the public key in text format in a file with the same name but |
strlcat(identity_file, ".pub", sizeof(identity_file)); |
.pub appended. */ |
f = fopen(identity_file, "w"); |
strcat(buf, ".pub"); |
if (!f) { |
f = fopen(buf, "w"); |
printf("Could not save your public key in %s\n", identity_file); |
if (!f) |
exit(1); |
{ |
} |
printf("Could not save your public key in %s\n", buf); |
if (!key_write(public, f)) |
exit(1); |
fprintf(stderr, "write key failed"); |
} |
fprintf(f, " %s\n", comment); |
fprintf(f, "%d ", public_key.bits); |
fclose(f); |
mpz_out_str(f, 10, &public_key.e); |
|
fprintf(f, " "); |
|
mpz_out_str(f, 10, &public_key.n); |
|
fprintf(f, " %s\n", buf2); |
|
fclose(f); |
|
|
|
printf("Your public key has been saved in %s\n", buf); |
if (!quiet) { |
|
printf("Your public key has been saved in %s.\n", |
exit(0); |
identity_file); |
|
printf("The key fingerprint is:\n"); |
|
printf("%s %s\n", key_fingerprint(public), comment); |
|
} |
|
|
|
key_free(public); |
|
exit(0); |
} |
} |