version 1.5, 1999/09/29 21:14:16 |
version 1.160, 2007/01/21 01:41:54 |
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/* $OpenBSD$ */ |
/* |
/* |
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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 |
#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/socket.h> |
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#include <sys/param.h> |
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Author: Tatu Ylonen <ylo@cs.hut.fi> |
#include <openssl/evp.h> |
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#include <openssl/pem.h> |
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Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
#include <errno.h> |
All rights reserved |
#include <fcntl.h> |
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#include <pwd.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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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" |
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RCSID("$Id$"); |
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#include "rsa.h" |
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#include "ssh.h" |
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#include "xmalloc.h" |
#include "xmalloc.h" |
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#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 "pathnames.h" |
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#include "log.h" |
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#include "misc.h" |
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#include "match.h" |
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#include "hostfile.h" |
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#include "dns.h" |
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/* Generated private key. */ |
#ifdef SMARTCARD |
RSA *private_key; |
#include "scard.h" |
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#endif |
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/* Generated public key. */ |
/* Number of bits in the RSA/DSA key. This value can be set on the command line. */ |
RSA *public_key; |
#define DEFAULT_BITS 2048 |
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#define DEFAULT_BITS_DSA 1024 |
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u_int32_t bits = 0; |
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/* Number of bits in the RSA key. This value can be changed on the command |
/* |
line. */ |
* Flag indicating that we just want to change the passphrase. This can be |
int bits = 1024; |
* set on the command line. |
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*/ |
/* 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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/* This is set to the identity file name if given on the command line. */ |
/* Flag indicating that we want to hash a known_hosts file */ |
char *identity_file = NULL; |
int hash_hosts = 0; |
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/* Flag indicating that we want lookup a host in known_hosts file */ |
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int find_host = 0; |
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/* Flag indicating that we want to delete a host from a known_hosts file */ |
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int delete_host = 0; |
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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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int print_bubblebabble = 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 print_generic = 0; |
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void |
char *key_type_name = NULL; |
do_change_passphrase(struct passwd *pw) |
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/* argv0 */ |
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extern char *__progname; |
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char hostname[MAXHOSTNAMELEN]; |
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/* moduli.c */ |
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int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
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int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); |
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static void |
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ask_filename(struct passwd *pw, const char *prompt) |
{ |
{ |
char buf[1024], *comment; |
char buf[1024]; |
char *old_passphrase, *passphrase1, *passphrase2; |
char *name = NULL; |
struct stat st; |
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RSA *private_key; |
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/* Read key file name. */ |
if (key_type_name == NULL) |
if (identity_file != NULL) { |
name = _PATH_SSH_CLIENT_ID_RSA; |
strncpy(buf, identity_file, sizeof(buf)); |
else { |
buf[sizeof(buf) - 1] = '\0'; |
switch (key_type_from_name(key_type_name)) { |
} else { |
case KEY_RSA1: |
printf("Enter file in which the key is ($HOME/%s): ", SSH_CLIENT_IDENTITY); |
name = _PATH_SSH_CLIENT_IDENTITY; |
fflush(stdout); |
break; |
if (fgets(buf, sizeof(buf), stdin) == NULL) |
case KEY_DSA: |
exit(1); |
name = _PATH_SSH_CLIENT_ID_DSA; |
if (strchr(buf, '\n')) |
break; |
*strchr(buf, '\n') = 0; |
case KEY_RSA: |
if (strcmp(buf, "") == 0) |
name = _PATH_SSH_CLIENT_ID_RSA; |
snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
break; |
} |
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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} |
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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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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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/* Check if the file exists. */ |
static Key * |
if (stat(buf, &st) < 0) |
load_identity(char *filename) |
{ |
{ |
perror(buf); |
char *pass; |
exit(1); |
Key *prv; |
} |
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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(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_free(public_key); |
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/* Try to load the file with empty passphrase. */ |
prv = key_load_private(filename, "", NULL); |
private_key = RSA_new(); |
if (prv == NULL) { |
if (!load_private_key(buf, "", private_key, &comment)) { |
if (identity_passphrase) |
/* Read passphrase from the user. */ |
pass = xstrdup(identity_passphrase); |
if (identity_passphrase) |
else |
old_passphrase = xstrdup(identity_passphrase); |
pass = read_passphrase("Enter passphrase: ", |
else |
RP_ALLOW_STDIN); |
old_passphrase = read_passphrase("Enter old passphrase: ", 1); |
prv = key_load_private(filename, pass, NULL); |
/* Try to load using the passphrase. */ |
memset(pass, 0, strlen(pass)); |
if (!load_private_key(buf, old_passphrase, private_key, &comment)) |
xfree(pass); |
{ |
} |
memset(old_passphrase, 0, strlen(old_passphrase)); |
return prv; |
xfree(old_passphrase); |
} |
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. */ |
#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
if (strcmp(passphrase1, passphrase2) != 0) |
#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
{ |
#define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
memset(passphrase1, 0, strlen(passphrase1)); |
#define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
memset(passphrase2, 0, strlen(passphrase2)); |
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xfree(passphrase1); |
static void |
xfree(passphrase2); |
do_convert_to_ssh2(struct passwd *pw) |
printf("Pass phrases do not match. Try again.\n"); |
{ |
exit(1); |
Key *k; |
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u_int len; |
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u_char *blob; |
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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); |
} |
} |
/* Destroy the other copy. */ |
if ((k = key_load_public(identity_file, NULL)) == NULL) { |
memset(passphrase2, 0, strlen(passphrase2)); |
if ((k = load_identity(identity_file)) == NULL) { |
xfree(passphrase2); |
fprintf(stderr, "load failed\n"); |
} |
exit(1); |
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} |
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} |
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if (k->type == KEY_RSA1) { |
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fprintf(stderr, "version 1 keys are not supported\n"); |
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exit(1); |
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} |
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if (key_to_blob(k, &blob, &len) <= 0) { |
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fprintf(stderr, "key_to_blob failed\n"); |
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exit(1); |
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} |
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fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
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fprintf(stdout, |
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"Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", |
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key_size(k), key_type(k), |
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pw->pw_name, hostname); |
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dump_base64(stdout, blob, len); |
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fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
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key_free(k); |
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xfree(blob); |
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exit(0); |
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} |
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/* Save the file using the new passphrase. */ |
static void |
if (!save_private_key(buf, passphrase1, private_key, comment)) |
buffer_get_bignum_bits(Buffer *b, BIGNUM *value) |
{ |
{ |
printf("Saving the key failed: %s: %s.\n", |
u_int bignum_bits = buffer_get_int(b); |
buf, strerror(errno)); |
u_int bytes = (bignum_bits + 7) / 8; |
memset(passphrase1, 0, strlen(passphrase1)); |
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xfree(passphrase1); |
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RSA_free(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_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 (buffer_len(b) < bytes) |
exit(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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if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL) |
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fatal("buffer_get_bignum_bits: BN_bin2bn failed"); |
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buffer_consume(b, bytes); |
} |
} |
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/* Change the comment of a private key file. */ |
static Key * |
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do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) |
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{ |
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Buffer b; |
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Key *key = NULL; |
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char *type, *cipher; |
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u_char *sig, data[] = "abcde12345"; |
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int magic, rlen, ktype, i1, i2, i3, i4; |
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u_int slen; |
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u_long e; |
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void |
buffer_init(&b); |
do_change_comment(struct passwd *pw) |
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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i1 = 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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i2 = buffer_get_int(&b); |
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i3 = buffer_get_int(&b); |
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i4 = buffer_get_int(&b); |
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debug("ignore (%d %d %d %d)", i1, i2, i3, i4); |
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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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buffer_free(&b); |
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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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e = buffer_get_char(&b); |
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debug("e %lx", e); |
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if (e < 30) { |
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e <<= 8; |
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e += buffer_get_char(&b); |
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debug("e %lx", e); |
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e <<= 8; |
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e += buffer_get_char(&b); |
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debug("e %lx", e); |
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} |
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if (!BN_set_word(key->rsa->e, e)) { |
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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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rsa_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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/* try the key */ |
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key_sign(key, &sig, &slen, data, sizeof(data)); |
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key_verify(key, sig, slen, data, sizeof(data)); |
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xfree(sig); |
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return key; |
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} |
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static int |
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get_line(FILE *fp, char *line, size_t len) |
{ |
{ |
char buf[1024], new_comment[1024], *comment; |
int c; |
RSA *private_key; |
size_t pos = 0; |
char *passphrase; |
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struct stat st; |
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FILE *f; |
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char *tmpbuf; |
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/* Read key file name. */ |
line[0] = '\0'; |
if (identity_file) |
while ((c = fgetc(fp)) != EOF) { |
{ |
if (pos >= len - 1) { |
strncpy(buf, identity_file, sizeof(buf)); |
fprintf(stderr, "input line too long.\n"); |
buf[sizeof(buf) - 1] = '\0'; |
exit(1); |
} |
} |
else |
switch (c) { |
{ |
case '\r': |
printf("Enter file in which the key is ($HOME/%s): ", |
c = fgetc(fp); |
SSH_CLIENT_IDENTITY); |
if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { |
fflush(stdout); |
fprintf(stderr, "unget: %s\n", strerror(errno)); |
if (fgets(buf, sizeof(buf), stdin) == NULL) |
exit(1); |
exit(1); |
} |
if (strchr(buf, '\n')) |
return pos; |
*strchr(buf, '\n') = 0; |
case '\n': |
if (strcmp(buf, "") == 0) |
return pos; |
snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
} |
} |
line[pos++] = c; |
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line[pos] = '\0'; |
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} |
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/* We reached EOF */ |
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return -1; |
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} |
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/* Check if the file exists. */ |
static void |
if (stat(buf, &st) < 0) |
do_convert_from_ssh2(struct passwd *pw) |
{ |
{ |
perror(buf); |
Key *k; |
exit(1); |
int blen; |
} |
u_int len; |
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char line[1024]; |
/* Try to load the public key from the file the verify that it is |
u_char blob[8096]; |
readable and of the proper format. */ |
char encoded[8096]; |
public_key = RSA_new(); |
struct stat st; |
if (!load_public_key(buf, public_key, NULL)) |
int escaped = 0, private = 0, ok; |
{ |
FILE *fp; |
printf("%s is not a valid key file.\n", buf); |
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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(buf, "", 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(buf, 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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} |
} |
} |
fp = fopen(identity_file, "r"); |
printf("Key now has comment '%s'\n", comment); |
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 ((blen = get_line(fp, line, sizeof(line))) != -1) { |
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if (line[blen - 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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if (strstr(line, " END ") != NULL) { |
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break; |
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} |
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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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strlcat(encoded, line, sizeof(encoded)); |
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} |
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len = strlen(encoded); |
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if (((len % 4) == 3) && |
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(encoded[len-1] == '=') && |
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(encoded[len-2] == '=') && |
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(encoded[len-3] == '=')) |
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encoded[len-3] = '\0'; |
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blen = uudecode(encoded, 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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if (!private) |
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fprintf(stdout, "\n"); |
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fclose(fp); |
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exit(0); |
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} |
|
|
if (identity_comment) |
static void |
{ |
do_print_public(struct passwd *pw) |
strncpy(new_comment, identity_comment, sizeof(new_comment)); |
{ |
new_comment[sizeof(new_comment) - 1] = '\0'; |
Key *prv; |
} |
struct stat st; |
else |
|
{ |
if (!have_identity) |
printf("Enter new comment: "); |
ask_filename(pw, "Enter file in which the key is"); |
fflush(stdout); |
if (stat(identity_file, &st) < 0) { |
if (!fgets(new_comment, sizeof(new_comment), stdin)) |
perror(identity_file); |
{ |
exit(1); |
memset(passphrase, 0, strlen(passphrase)); |
|
RSA_free(private_key); |
|
exit(1); |
|
} |
} |
|
prv = load_identity(identity_file); |
/* Remove terminating newline from comment. */ |
if (prv == NULL) { |
if (strchr(new_comment, '\n')) |
fprintf(stderr, "load failed\n"); |
*strchr(new_comment, '\n') = 0; |
exit(1); |
} |
} |
|
if (!key_write(prv, stdout)) |
/* Save the file using the new passphrase. */ |
fprintf(stderr, "key_write failed"); |
if (!save_private_key(buf, passphrase, private_key, new_comment)) |
key_free(prv); |
{ |
fprintf(stdout, "\n"); |
printf("Saving the key failed: %s: %s.\n", |
exit(0); |
buf, 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. */ |
#ifdef SMARTCARD |
memset(passphrase, 0, strlen(passphrase)); |
static void |
xfree(passphrase); |
do_upload(struct passwd *pw, const char *sc_reader_id) |
RSA_free(private_key); |
{ |
|
Key *prv = NULL; |
|
struct stat st; |
|
int ret; |
|
|
/* 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"); |
strcat(buf, ".pub"); |
if (stat(identity_file, &st) < 0) { |
f = fopen(buf, "w"); |
perror(identity_file); |
if (!f) |
exit(1); |
{ |
} |
printf("Could not save your public key in %s\n", buf); |
prv = load_identity(identity_file); |
exit(1); |
if (prv == NULL) { |
} |
error("load failed"); |
fprintf(f, "%d ", BN_num_bits(public_key->n)); |
exit(1); |
tmpbuf = BN_bn2dec(public_key->e); |
} |
fprintf(f, "%s ", tmpbuf); |
ret = sc_put_key(prv, sc_reader_id); |
free (tmpbuf); |
key_free(prv); |
tmpbuf = BN_bn2dec(public_key->n); |
if (ret < 0) |
fprintf(f, "%s %s\n", tmpbuf, new_comment); |
exit(1); |
free (tmpbuf); |
logit("loading key done"); |
fclose(f); |
exit(0); |
|
} |
|
|
xfree(comment); |
static void |
|
do_download(struct passwd *pw, const char *sc_reader_id) |
|
{ |
|
Key **keys = NULL; |
|
int i; |
|
|
printf("The comment in your key file has been changed.\n"); |
keys = sc_get_keys(sc_reader_id, NULL); |
exit(0); |
if (keys == NULL) |
|
fatal("cannot read public key from smartcard"); |
|
for (i = 0; keys[i]; i++) { |
|
key_write(keys[i], stdout); |
|
key_free(keys[i]); |
|
fprintf(stdout, "\n"); |
|
} |
|
xfree(keys); |
|
exit(0); |
} |
} |
|
#endif /* SMARTCARD */ |
|
|
/* Main program for key management. */ |
static void |
|
do_fingerprint(struct passwd *pw) |
|
{ |
|
FILE *f; |
|
Key *public; |
|
char *comment = NULL, *cp, *ep, line[16*1024], *fp; |
|
int i, skip = 0, num = 1, invalid = 1; |
|
enum fp_rep rep; |
|
enum fp_type fptype; |
|
struct stat st; |
|
|
int |
fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; |
main(int ac, char **av) |
rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; |
|
|
|
if (!have_identity) |
|
ask_filename(pw, "Enter file in which the key is"); |
|
if (stat(identity_file, &st) < 0) { |
|
perror(identity_file); |
|
exit(1); |
|
} |
|
public = key_load_public(identity_file, &comment); |
|
if (public != NULL) { |
|
fp = key_fingerprint(public, fptype, rep); |
|
printf("%u %s %s\n", key_size(public), fp, comment); |
|
key_free(public); |
|
xfree(comment); |
|
xfree(fp); |
|
exit(0); |
|
} |
|
if (comment) { |
|
xfree(comment); |
|
comment = NULL; |
|
} |
|
|
|
f = fopen(identity_file, "r"); |
|
if (f != NULL) { |
|
while (fgets(line, sizeof(line), f)) { |
|
i = strlen(line) - 1; |
|
if (line[i] != '\n') { |
|
error("line %d too long: %.40s...", num, line); |
|
skip = 1; |
|
continue; |
|
} |
|
num++; |
|
if (skip) { |
|
skip = 0; |
|
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("%u %s %s\n", key_size(public), fp, |
|
comment ? comment : "no comment"); |
|
xfree(fp); |
|
key_free(public); |
|
invalid = 0; |
|
} |
|
fclose(f); |
|
} |
|
if (invalid) { |
|
printf("%s is not a public key file.\n", identity_file); |
|
exit(1); |
|
} |
|
exit(0); |
|
} |
|
|
|
static void |
|
print_host(FILE *f, char *name, Key *public, int hash) |
{ |
{ |
char buf[16384], buf2[1024], *passphrase1, *passphrase2; |
if (hash && (name = host_hash(name, NULL, 0)) == NULL) |
struct passwd *pw; |
fatal("hash_host failed"); |
char *tmpbuf; |
fprintf(f, "%s ", name); |
int opt; |
if (!key_write(public, f)) |
struct stat st; |
fatal("key_write failed"); |
FILE *f; |
fprintf(f, "\n"); |
char hostname[MAXHOSTNAMELEN]; |
} |
extern int optind; |
|
extern char *optarg; |
|
|
|
/* check if RSA support exists */ |
static void |
if (rsa_alive() == 0) { |
do_known_hosts(struct passwd *pw, const char *name) |
extern char *__progname; |
{ |
|
FILE *in, *out = stdout; |
|
Key *public; |
|
char *cp, *cp2, *kp, *kp2; |
|
char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; |
|
int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; |
|
|
fprintf(stderr, |
if (!have_identity) { |
"%s: no RSA support in libssl and libcrypto. See ssl(8).\n", |
cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); |
__progname); |
if (strlcpy(identity_file, cp, sizeof(identity_file)) >= |
exit(1); |
sizeof(identity_file)) |
} |
fatal("Specified known hosts path too long"); |
|
xfree(cp); |
|
have_identity = 1; |
|
} |
|
if ((in = fopen(identity_file, "r")) == NULL) |
|
fatal("fopen: %s", strerror(errno)); |
|
|
/* Get user\'s passwd structure. We need this for the home directory. */ |
/* |
pw = getpwuid(getuid()); |
* Find hosts goes to stdout, hash and deletions happen in-place |
if (!pw) |
* A corner case is ssh-keygen -HF foo, which should go to stdout |
{ |
*/ |
printf("You don't exist, go away!\n"); |
if (!find_host && (hash_hosts || delete_host)) { |
exit(1); |
if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || |
} |
strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || |
|
strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || |
|
strlcat(old, ".old", sizeof(old)) >= sizeof(old)) |
|
fatal("known_hosts path too long"); |
|
umask(077); |
|
if ((c = mkstemp(tmp)) == -1) |
|
fatal("mkstemp: %s", strerror(errno)); |
|
if ((out = fdopen(c, "w")) == NULL) { |
|
c = errno; |
|
unlink(tmp); |
|
fatal("fdopen: %s", strerror(c)); |
|
} |
|
inplace = 1; |
|
} |
|
|
/* Create ~/.ssh directory if it doesn\'t already exist. */ |
while (fgets(line, sizeof(line), in)) { |
snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_USER_DIR); |
num++; |
if (stat(buf, &st) < 0) |
i = strlen(line) - 1; |
if (mkdir(buf, 0755) < 0) |
if (line[i] != '\n') { |
error("Could not create directory '%s'.", buf); |
error("line %d too long: %.40s...", num, line); |
|
skip = 1; |
|
invalid = 1; |
|
continue; |
|
} |
|
if (skip) { |
|
skip = 0; |
|
continue; |
|
} |
|
line[i] = '\0'; |
|
|
/* Parse command line arguments. */ |
/* Skip leading whitespace, empty and comment lines. */ |
while ((opt = getopt(ac, av, "qpcb:f:P:N:C:")) != EOF) |
for (cp = line; *cp == ' ' || *cp == '\t'; cp++) |
{ |
; |
switch (opt) |
if (!*cp || *cp == '\n' || *cp == '#') { |
{ |
if (inplace) |
case 'b': |
fprintf(out, "%s\n", cp); |
bits = atoi(optarg); |
continue; |
if (bits < 512 || bits > 32768) |
} |
{ |
/* Find the end of the host name portion. */ |
printf("Bits has bad value.\n"); |
for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) |
exit(1); |
; |
} |
if (*kp == '\0' || *(kp + 1) == '\0') { |
break; |
error("line %d missing key: %.40s...", |
|
num, line); |
|
invalid = 1; |
|
continue; |
|
} |
|
*kp++ = '\0'; |
|
kp2 = kp; |
|
|
case 'p': |
public = key_new(KEY_RSA1); |
change_passphrase = 1; |
if (key_read(public, &kp) != 1) { |
break; |
kp = kp2; |
|
key_free(public); |
|
public = key_new(KEY_UNSPEC); |
|
if (key_read(public, &kp) != 1) { |
|
error("line %d invalid key: %.40s...", |
|
num, line); |
|
key_free(public); |
|
invalid = 1; |
|
continue; |
|
} |
|
} |
|
|
case 'c': |
if (*cp == HASH_DELIM) { |
change_comment = 1; |
if (find_host || delete_host) { |
break; |
cp2 = host_hash(name, cp, strlen(cp)); |
|
if (cp2 == NULL) { |
|
error("line %d: invalid hashed " |
|
"name: %.64s...", num, line); |
|
invalid = 1; |
|
continue; |
|
} |
|
c = (strcmp(cp2, cp) == 0); |
|
if (find_host && c) { |
|
printf("# Host %s found: " |
|
"line %d type %s\n", name, |
|
num, key_type(public)); |
|
print_host(out, cp, public, 0); |
|
} |
|
if (delete_host && !c) |
|
print_host(out, cp, public, 0); |
|
} else if (hash_hosts) |
|
print_host(out, cp, public, 0); |
|
} else { |
|
if (find_host || delete_host) { |
|
c = (match_hostname(name, cp, |
|
strlen(cp)) == 1); |
|
if (find_host && c) { |
|
printf("# Host %s found: " |
|
"line %d type %s\n", name, |
|
num, key_type(public)); |
|
print_host(out, cp, public, hash_hosts); |
|
} |
|
if (delete_host && !c) |
|
print_host(out, cp, public, 0); |
|
} else if (hash_hosts) { |
|
for (cp2 = strsep(&cp, ","); |
|
cp2 != NULL && *cp2 != '\0'; |
|
cp2 = strsep(&cp, ",")) { |
|
if (strcspn(cp2, "*?!") != strlen(cp2)) |
|
fprintf(stderr, "Warning: " |
|
"ignoring host name with " |
|
"metacharacters: %.64s\n", |
|
cp2); |
|
else |
|
print_host(out, cp2, public, 1); |
|
} |
|
has_unhashed = 1; |
|
} |
|
} |
|
key_free(public); |
|
} |
|
fclose(in); |
|
|
case 'f': |
if (invalid) { |
identity_file = optarg; |
fprintf(stderr, "%s is not a valid known_host file.\n", |
break; |
identity_file); |
|
if (inplace) { |
case 'P': |
fprintf(stderr, "Not replacing existing known_hosts " |
identity_passphrase = optarg; |
"file because of errors\n"); |
break; |
fclose(out); |
|
unlink(tmp); |
|
} |
|
exit(1); |
|
} |
|
|
case 'N': |
if (inplace) { |
identity_new_passphrase = optarg; |
fclose(out); |
break; |
|
|
|
case 'C': |
/* Backup existing file */ |
identity_comment = optarg; |
if (unlink(old) == -1 && errno != ENOENT) |
break; |
fatal("unlink %.100s: %s", old, strerror(errno)); |
|
if (link(identity_file, old) == -1) |
|
fatal("link %.100s to %.100s: %s", identity_file, old, |
|
strerror(errno)); |
|
/* Move new one into place */ |
|
if (rename(tmp, identity_file) == -1) { |
|
error("rename\"%s\" to \"%s\": %s", tmp, identity_file, |
|
strerror(errno)); |
|
unlink(tmp); |
|
unlink(old); |
|
exit(1); |
|
} |
|
|
case 'q': |
fprintf(stderr, "%s updated.\n", identity_file); |
quiet = 1; |
fprintf(stderr, "Original contents retained as %s\n", old); |
break; |
if (has_unhashed) { |
|
fprintf(stderr, "WARNING: %s contains unhashed " |
|
"entries\n", old); |
|
fprintf(stderr, "Delete this file to ensure privacy " |
|
"of hostnames\n"); |
|
} |
|
} |
|
|
case '?': |
exit(0); |
default: |
} |
printf("ssh-keygen version %s\n", SSH_VERSION); |
|
printf("Usage: %s [-b bits] [-p] [-c] [-f file] [-P pass] [-N new-pass] [-C comment]\n", av[0]); |
/* |
exit(1); |
* Perform changing a passphrase. The argument is the passwd structure |
|
* for the current user. |
|
*/ |
|
static void |
|
do_change_passphrase(struct passwd *pw) |
|
{ |
|
char *comment; |
|
char *old_passphrase, *passphrase1, *passphrase2; |
|
struct stat st; |
|
Key *private; |
|
|
|
if (!have_identity) |
|
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 file with empty passphrase. */ |
if (optind < ac) |
private = key_load_private(identity_file, "", &comment); |
{ |
if (private == NULL) { |
printf("Too many arguments.\n"); |
if (identity_passphrase) |
exit(1); |
old_passphrase = xstrdup(identity_passphrase); |
} |
else |
if (change_passphrase && change_comment) |
old_passphrase = |
{ |
read_passphrase("Enter old passphrase: ", |
printf("Can only have one of -p and -c.\n"); |
RP_ALLOW_STDIN); |
exit(1); |
private = key_load_private(identity_file, old_passphrase, |
} |
&comment); |
|
memset(old_passphrase, 0, strlen(old_passphrase)); |
|
xfree(old_passphrase); |
|
if (private == NULL) { |
|
printf("Bad passphrase.\n"); |
|
exit(1); |
|
} |
|
} |
|
printf("Key has comment '%s'\n", comment); |
|
|
/* If the user requested to change the passphrase, do it now. This |
/* Ask the new passphrase (twice). */ |
function never returns. */ |
if (identity_new_passphrase) { |
if (change_passphrase) |
passphrase1 = xstrdup(identity_new_passphrase); |
do_change_passphrase(pw); |
passphrase2 = NULL; |
|
} else { |
|
passphrase1 = |
|
read_passphrase("Enter new passphrase (empty for no " |
|
"passphrase): ", RP_ALLOW_STDIN); |
|
passphrase2 = read_passphrase("Enter same passphrase again: ", |
|
RP_ALLOW_STDIN); |
|
|
/* If the user requested to change the comment, do it now. This function |
/* Verify that they are the same. */ |
never returns. */ |
if (strcmp(passphrase1, passphrase2) != 0) { |
if (change_comment) |
memset(passphrase1, 0, strlen(passphrase1)); |
do_change_comment(pw); |
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); |
|
} |
|
|
/* Initialize random number generator. This may take a while if the |
/* Save the file using the new passphrase. */ |
user has no seed file, so display a message to the user. */ |
if (!key_save_private(private, identity_file, passphrase1, comment)) { |
if (!quiet) |
printf("Saving the key failed: %s.\n", identity_file); |
printf("Initializing random number generator...\n"); |
memset(passphrase1, 0, strlen(passphrase1)); |
arc4random_stir(); |
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); |
|
|
if (quiet) |
printf("Your identification has been saved with the new passphrase.\n"); |
rsa_set_verbose(0); |
exit(0); |
|
} |
|
|
/* Generate the rsa key pair. */ |
/* |
private_key = RSA_new(); |
* Print the SSHFP RR. |
public_key = RSA_new(); |
*/ |
rsa_generate_key(private_key, public_key, bits); |
static int |
|
do_print_resource_record(struct passwd *pw, char *fname, char *hname) |
|
{ |
|
Key *public; |
|
char *comment = NULL; |
|
struct stat st; |
|
|
ask_file_again: |
if (fname == NULL) |
|
ask_filename(pw, "Enter file in which the key is"); |
|
if (stat(fname, &st) < 0) { |
|
if (errno == ENOENT) |
|
return 0; |
|
perror(fname); |
|
exit(1); |
|
} |
|
public = key_load_public(fname, &comment); |
|
if (public != NULL) { |
|
export_dns_rr(hname, public, stdout, print_generic); |
|
key_free(public); |
|
xfree(comment); |
|
return 1; |
|
} |
|
if (comment) |
|
xfree(comment); |
|
|
/* Ask for a file to save the key in. */ |
printf("failed to read v2 public key from %s.\n", fname); |
if (identity_file) |
|
{ |
|
strncpy(buf, identity_file, sizeof(buf)); |
|
buf[sizeof(buf) - 1] = '\0'; |
|
} |
|
else |
|
{ |
|
printf("Enter file in which to save the key ($HOME/%s): ", |
|
SSH_CLIENT_IDENTITY); |
|
fflush(stdout); |
|
if (fgets(buf, sizeof(buf), stdin) == NULL) |
|
exit(1); |
exit(1); |
if (strchr(buf, '\n')) |
} |
*strchr(buf, '\n') = 0; |
|
if (strcmp(buf, "") == 0) |
|
snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); |
|
} |
|
|
|
/* If the file aready exists, ask the user to confirm. */ |
/* |
if (stat(buf, &st) >= 0) |
* Change the comment of a private key file. |
{ |
*/ |
printf("%s already exists.\n", buf); |
static void |
printf("Overwrite (y/n)? "); |
do_change_comment(struct passwd *pw) |
fflush(stdout); |
{ |
if (fgets(buf2, sizeof(buf2), stdin) == NULL) |
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: ", |
|
RP_ALLOW_STDIN); |
|
/* 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.\n", identity_file); |
|
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); |
|
} |
|
|
|
static void |
|
usage(void) |
|
{ |
|
fprintf(stderr, "Usage: %s [options]\n", __progname); |
|
fprintf(stderr, "Options:\n"); |
|
fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); |
|
fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); |
|
fprintf(stderr, " -b bits Number of bits in the key to create.\n"); |
|
fprintf(stderr, " -C comment Provide new comment.\n"); |
|
fprintf(stderr, " -c Change comment in private and public key files.\n"); |
|
#ifdef SMARTCARD |
|
fprintf(stderr, " -D reader Download public key from smartcard.\n"); |
|
#endif /* SMARTCARD */ |
|
fprintf(stderr, " -e Convert OpenSSH to RFC 4716 key file.\n"); |
|
fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); |
|
fprintf(stderr, " -f filename Filename of the key file.\n"); |
|
fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); |
|
fprintf(stderr, " -g Use generic DNS resource record format.\n"); |
|
fprintf(stderr, " -H Hash names in known_hosts file.\n"); |
|
fprintf(stderr, " -i Convert RFC 4716 to OpenSSH key file.\n"); |
|
fprintf(stderr, " -l Show fingerprint of key file.\n"); |
|
fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); |
|
fprintf(stderr, " -N phrase Provide new passphrase.\n"); |
|
fprintf(stderr, " -P phrase Provide old passphrase.\n"); |
|
fprintf(stderr, " -p Change passphrase of private key file.\n"); |
|
fprintf(stderr, " -q Quiet.\n"); |
|
fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); |
|
fprintf(stderr, " -r hostname Print DNS resource record.\n"); |
|
fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); |
|
fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); |
|
fprintf(stderr, " -t type Specify type of key to create.\n"); |
|
#ifdef SMARTCARD |
|
fprintf(stderr, " -U reader Upload private key to smartcard.\n"); |
|
#endif /* SMARTCARD */ |
|
fprintf(stderr, " -v Verbose.\n"); |
|
fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); |
|
fprintf(stderr, " -y Read private key file and print public key.\n"); |
|
|
exit(1); |
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 |
/* |
edit this field. */ |
* Main program for key management. |
if (identity_comment) |
*/ |
{ |
int |
strlcpy(buf2, identity_comment, sizeof(buf2)); |
main(int argc, char **argv) |
} |
{ |
else |
char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; |
{ |
char out_file[MAXPATHLEN], *reader_id = NULL; |
if (gethostname(hostname, sizeof(hostname)) < 0) |
char *rr_hostname = NULL; |
{ |
Key *private, *public; |
perror("gethostname"); |
struct passwd *pw; |
exit(1); |
struct stat st; |
|
int opt, type, fd, download = 0; |
|
u_int32_t memory = 0, generator_wanted = 0, trials = 100; |
|
int do_gen_candidates = 0, do_screen_candidates = 0; |
|
int log_level = SYSLOG_LEVEL_INFO; |
|
BIGNUM *start = NULL; |
|
FILE *f; |
|
const char *errstr; |
|
|
|
extern int optind; |
|
extern char *optarg; |
|
|
|
/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
|
sanitise_stdfd(); |
|
|
|
SSLeay_add_all_algorithms(); |
|
log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
|
|
|
/* we need this for the home * directory. */ |
|
pw = getpwuid(getuid()); |
|
if (!pw) { |
|
printf("You don't exist, go away!\n"); |
|
exit(1); |
} |
} |
snprintf(buf2, sizeof buf2, "%s@%s", pw->pw_name, hostname); |
if (gethostname(hostname, sizeof(hostname)) < 0) { |
} |
perror("gethostname"); |
|
exit(1); |
|
} |
|
|
/* Save the key with the given passphrase and comment. */ |
while ((opt = getopt(argc, argv, |
if (!save_private_key(buf, passphrase1, private_key, buf2)) |
"degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) { |
{ |
switch (opt) { |
printf("Saving the key failed: %s: %s.\n", |
case 'b': |
buf, strerror(errno)); |
bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr); |
memset(passphrase1, 0, strlen(passphrase1)); |
if (errstr) |
xfree(passphrase1); |
fatal("Bits has bad value %s (%s)", |
goto ask_file_again; |
optarg, errstr); |
} |
break; |
/* Clear the passphrase. */ |
case 'F': |
memset(passphrase1, 0, strlen(passphrase1)); |
find_host = 1; |
xfree(passphrase1); |
rr_hostname = optarg; |
|
break; |
|
case 'H': |
|
hash_hosts = 1; |
|
break; |
|
case 'R': |
|
delete_host = 1; |
|
rr_hostname = optarg; |
|
break; |
|
case 'l': |
|
print_fingerprint = 1; |
|
break; |
|
case 'B': |
|
print_bubblebabble = 1; |
|
break; |
|
case 'p': |
|
change_passphrase = 1; |
|
break; |
|
case 'c': |
|
change_comment = 1; |
|
break; |
|
case 'f': |
|
if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= |
|
sizeof(identity_file)) |
|
fatal("Identity filename too long"); |
|
have_identity = 1; |
|
break; |
|
case 'g': |
|
print_generic = 1; |
|
break; |
|
case 'P': |
|
identity_passphrase = optarg; |
|
break; |
|
case 'N': |
|
identity_new_passphrase = optarg; |
|
break; |
|
case 'C': |
|
identity_comment = optarg; |
|
break; |
|
case 'q': |
|
quiet = 1; |
|
break; |
|
case 'e': |
|
case 'x': |
|
/* export key */ |
|
convert_to_ssh2 = 1; |
|
break; |
|
case 'i': |
|
case 'X': |
|
/* import key */ |
|
convert_from_ssh2 = 1; |
|
break; |
|
case 'y': |
|
print_public = 1; |
|
break; |
|
case 'd': |
|
key_type_name = "dsa"; |
|
break; |
|
case 't': |
|
key_type_name = optarg; |
|
break; |
|
case 'D': |
|
download = 1; |
|
/*FALLTHROUGH*/ |
|
case 'U': |
|
reader_id = optarg; |
|
break; |
|
case 'v': |
|
if (log_level == SYSLOG_LEVEL_INFO) |
|
log_level = SYSLOG_LEVEL_DEBUG1; |
|
else { |
|
if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
|
log_level < SYSLOG_LEVEL_DEBUG3) |
|
log_level++; |
|
} |
|
break; |
|
case 'r': |
|
rr_hostname = optarg; |
|
break; |
|
case 'W': |
|
generator_wanted = (u_int32_t)strtonum(optarg, 1, |
|
UINT_MAX, &errstr); |
|
if (errstr) |
|
fatal("Desired generator has bad value: %s (%s)", |
|
optarg, errstr); |
|
break; |
|
case 'a': |
|
trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
|
if (errstr) |
|
fatal("Invalid number of trials: %s (%s)", |
|
optarg, errstr); |
|
break; |
|
case 'M': |
|
memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); |
|
if (errstr) { |
|
fatal("Memory limit is %s: %s", errstr, optarg); |
|
} |
|
break; |
|
case 'G': |
|
do_gen_candidates = 1; |
|
if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
|
sizeof(out_file)) |
|
fatal("Output filename too long"); |
|
break; |
|
case 'T': |
|
do_screen_candidates = 1; |
|
if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
|
sizeof(out_file)) |
|
fatal("Output filename too long"); |
|
break; |
|
case 'S': |
|
/* XXX - also compare length against bits */ |
|
if (BN_hex2bn(&start, optarg) == 0) |
|
fatal("Invalid start point."); |
|
break; |
|
case '?': |
|
default: |
|
usage(); |
|
} |
|
} |
|
|
/* Clear the private key and the random number generator. */ |
/* reinit */ |
RSA_free(private_key); |
log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); |
arc4random_stir(); |
|
|
|
if (!quiet) |
if (optind < argc) { |
printf("Your identification has been saved in %s.\n", buf); |
printf("Too many arguments.\n"); |
|
usage(); |
|
} |
|
if (change_passphrase && change_comment) { |
|
printf("Can only have one of -p and -c.\n"); |
|
usage(); |
|
} |
|
if (delete_host || hash_hosts || find_host) |
|
do_known_hosts(pw, rr_hostname); |
|
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 (rr_hostname != NULL) { |
|
unsigned int n = 0; |
|
|
/* Display the public key on the screen. */ |
if (have_identity) { |
if (!quiet) { |
n = do_print_resource_record(pw, |
printf("Your public key is:\n"); |
identity_file, rr_hostname); |
printf("%d ", BN_num_bits(public_key->n)); |
if (n == 0) { |
tmpbuf = BN_bn2dec(public_key->e); |
perror(identity_file); |
printf("%s ", tmpbuf); |
exit(1); |
free(tmpbuf); |
} |
tmpbuf = BN_bn2dec(public_key->n); |
exit(0); |
printf("%s %s\n", tmpbuf, buf2); |
} else { |
free(tmpbuf); |
|
} |
|
|
|
/* Save the public key in text format in a file with the same name but |
n += do_print_resource_record(pw, |
.pub appended. */ |
_PATH_HOST_RSA_KEY_FILE, rr_hostname); |
strcat(buf, ".pub"); |
n += do_print_resource_record(pw, |
f = fopen(buf, "w"); |
_PATH_HOST_DSA_KEY_FILE, rr_hostname); |
if (!f) |
|
{ |
|
printf("Could not save your public key in %s\n", buf); |
|
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 (n == 0) |
printf("Your public key has been saved in %s\n", buf); |
fatal("no keys found."); |
|
exit(0); |
exit(0); |
} |
|
} |
|
if (reader_id != NULL) { |
|
#ifdef SMARTCARD |
|
if (download) |
|
do_download(pw, reader_id); |
|
else |
|
do_upload(pw, reader_id); |
|
#else /* SMARTCARD */ |
|
fatal("no support for smartcards."); |
|
#endif /* SMARTCARD */ |
|
} |
|
|
|
if (do_gen_candidates) { |
|
FILE *out = fopen(out_file, "w"); |
|
|
|
if (out == NULL) { |
|
error("Couldn't open modulus candidate file \"%s\": %s", |
|
out_file, strerror(errno)); |
|
return (1); |
|
} |
|
if (bits == 0) |
|
bits = DEFAULT_BITS; |
|
if (gen_candidates(out, memory, bits, start) != 0) |
|
fatal("modulus candidate generation failed"); |
|
|
|
return (0); |
|
} |
|
|
|
if (do_screen_candidates) { |
|
FILE *in; |
|
FILE *out = fopen(out_file, "w"); |
|
|
|
if (have_identity && strcmp(identity_file, "-") != 0) { |
|
if ((in = fopen(identity_file, "r")) == NULL) { |
|
fatal("Couldn't open modulus candidate " |
|
"file \"%s\": %s", identity_file, |
|
strerror(errno)); |
|
} |
|
} else |
|
in = stdin; |
|
|
|
if (out == NULL) { |
|
fatal("Couldn't open moduli file \"%s\": %s", |
|
out_file, strerror(errno)); |
|
} |
|
if (prime_test(in, out, trials, generator_wanted) != 0) |
|
fatal("modulus screening failed"); |
|
return (0); |
|
} |
|
|
|
arc4random_stir(); |
|
|
|
if (key_type_name == NULL) |
|
key_type_name = "rsa"; |
|
|
|
type = key_type_from_name(key_type_name); |
|
if (type == KEY_UNSPEC) { |
|
fprintf(stderr, "unknown key type %s\n", key_type_name); |
|
exit(1); |
|
} |
|
if (bits == 0) |
|
bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS; |
|
if (type == KEY_DSA && bits != 1024) |
|
fatal("DSA keys must be 1024 bits"); |
|
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); |
|
|
|
if (!have_identity) |
|
ask_filename(pw, "Enter file in which to save the key"); |
|
|
|
/* Create ~/.ssh directory if it doesn't already exist. */ |
|
snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR); |
|
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): ", RP_ALLOW_STDIN); |
|
passphrase2 = read_passphrase("Enter same passphrase again: ", |
|
RP_ALLOW_STDIN); |
|
if (strcmp(passphrase1, passphrase2) != 0) { |
|
/* |
|
* The passphrases do not match. Clear them and |
|
* retry. |
|
*/ |
|
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 (identity_comment) { |
|
strlcpy(comment, identity_comment, sizeof(comment)); |
|
} else { |
|
/* Create default commend field for the passphrase. */ |
|
snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
|
} |
|
|
|
/* Save the key with the given passphrase and comment. */ |
|
if (!key_save_private(private, identity_file, passphrase1, comment)) { |
|
printf("Saving the key failed: %s.\n", identity_file); |
|
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. */ |
|
key_free(private); |
|
arc4random_stir(); |
|
|
|
if (!quiet) |
|
printf("Your identification has been saved in %s.\n", identity_file); |
|
|
|
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); |
} |
} |