Damien Miller | 03c0e53 | 2010-12-01 12:03:39 +1100 | [diff] [blame] | 1 | /* $OpenBSD: authfile.c,v 1.87 2010/11/29 18:57:04 markus Exp $ */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 2 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 5 | * All rights reserved |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 6 | * This file contains functions for reading and writing identity files, and |
| 7 | * for reading the passphrase from the user. |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 8 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 9 | * As far as I am concerned, the code I have written for this software |
| 10 | * can be used freely for any purpose. Any derived versions of this |
| 11 | * software must be clearly marked as such, and if the derived work is |
| 12 | * incompatible with the protocol description in the RFC file, it must be |
| 13 | * called by a name other than "ssh" or "Secure Shell". |
| 14 | * |
| 15 | * |
| 16 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
| 17 | * |
| 18 | * Redistribution and use in source and binary forms, with or without |
| 19 | * modification, are permitted provided that the following conditions |
| 20 | * are met: |
| 21 | * 1. Redistributions of source code must retain the above copyright |
| 22 | * notice, this list of conditions and the following disclaimer. |
| 23 | * 2. Redistributions in binary form must reproduce the above copyright |
| 24 | * notice, this list of conditions and the following disclaimer in the |
| 25 | * documentation and/or other materials provided with the distribution. |
| 26 | * |
| 27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 28 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 29 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 30 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 31 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 32 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 33 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 34 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 35 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 36 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 37 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 38 | |
| 39 | #include "includes.h" |
Damien Miller | f17883e | 2006-03-15 11:45:54 +1100 | [diff] [blame] | 40 | |
| 41 | #include <sys/types.h> |
| 42 | #include <sys/stat.h> |
Damien Miller | 8dbffe7 | 2006-08-05 11:02:17 +1000 | [diff] [blame] | 43 | #include <sys/param.h> |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 44 | #include <sys/uio.h> |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 45 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 46 | #include <openssl/err.h> |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 47 | #include <openssl/evp.h> |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 48 | #include <openssl/pem.h> |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 49 | |
Darren Tucker | e89ed1c | 2009-11-05 20:43:16 +1100 | [diff] [blame] | 50 | /* compatibility with old or broken OpenSSL versions */ |
| 51 | #include "openbsd-compat/openssl-compat.h" |
| 52 | |
Darren Tucker | ba72405 | 2006-07-12 22:24:22 +1000 | [diff] [blame] | 53 | #include <errno.h> |
Damien Miller | 57cf638 | 2006-07-10 21:13:46 +1000 | [diff] [blame] | 54 | #include <fcntl.h> |
Damien Miller | ded319c | 2006-09-01 15:38:36 +1000 | [diff] [blame] | 55 | #include <stdarg.h> |
Damien Miller | a7a73ee | 2006-08-05 11:37:59 +1000 | [diff] [blame] | 56 | #include <stdio.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 57 | #include <stdlib.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 58 | #include <string.h> |
Damien Miller | e6b3b61 | 2006-07-24 14:01:23 +1000 | [diff] [blame] | 59 | #include <unistd.h> |
Damien Miller | 57cf638 | 2006-07-10 21:13:46 +1000 | [diff] [blame] | 60 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 61 | #include "xmalloc.h" |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 62 | #include "cipher.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 63 | #include "buffer.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 64 | #include "key.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 65 | #include "ssh.h" |
| 66 | #include "log.h" |
Ben Lindstrom | 31ca54a | 2001-02-09 02:11:24 +0000 | [diff] [blame] | 67 | #include "authfile.h" |
Damien Miller | 040b64f | 2002-01-22 23:10:04 +1100 | [diff] [blame] | 68 | #include "rsa.h" |
Darren Tucker | f0f9098 | 2004-12-11 13:39:50 +1100 | [diff] [blame] | 69 | #include "misc.h" |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 70 | #include "atomicio.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 71 | |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 72 | /* Version identification string for SSH v1 identity files. */ |
Ben Lindstrom | 1170d71 | 2001-01-29 07:51:26 +0000 | [diff] [blame] | 73 | static const char authfile_id_string[] = |
| 74 | "SSH PRIVATE KEY FILE FORMAT 1.1\n"; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 75 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 76 | /* |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 77 | * Serialises the authentication (private) key to a blob, encrypting it with |
| 78 | * passphrase. The identification of the blob (lowest 64 bits of n) will |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 79 | * precede the key to provide identification of the key without needing a |
| 80 | * passphrase. |
| 81 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 82 | static int |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 83 | key_private_rsa1_to_blob(Key *key, Buffer *blob, const char *passphrase, |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 84 | const char *comment) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 85 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 86 | Buffer buffer, encrypted; |
Damien Miller | 708d21c | 2002-01-22 23:18:15 +1100 | [diff] [blame] | 87 | u_char buf[100], *cp; |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 88 | int i, cipher_num; |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 89 | CipherContext ciphercontext; |
| 90 | Cipher *cipher; |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 91 | u_int32_t rnd; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 92 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 93 | /* |
| 94 | * If the passphrase is empty, use SSH_CIPHER_NONE to ease converting |
| 95 | * to another cipher; otherwise use SSH_AUTHFILE_CIPHER. |
| 96 | */ |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 97 | cipher_num = (strcmp(passphrase, "") == 0) ? |
| 98 | SSH_CIPHER_NONE : SSH_AUTHFILE_CIPHER; |
| 99 | if ((cipher = cipher_by_number(cipher_num)) == NULL) |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 100 | fatal("save_private_key_rsa: bad cipher"); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 101 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 102 | /* This buffer is used to built the secret part of the private key. */ |
| 103 | buffer_init(&buffer); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 104 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 105 | /* Put checkbytes for checking passphrase validity. */ |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 106 | rnd = arc4random(); |
| 107 | buf[0] = rnd & 0xff; |
| 108 | buf[1] = (rnd >> 8) & 0xff; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 109 | buf[2] = buf[0]; |
| 110 | buf[3] = buf[1]; |
| 111 | buffer_append(&buffer, buf, 4); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 112 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 113 | /* |
| 114 | * Store the private key (n and e will not be stored because they |
| 115 | * will be stored in plain text, and storing them also in encrypted |
| 116 | * format would just give known plaintext). |
| 117 | */ |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 118 | buffer_put_bignum(&buffer, key->rsa->d); |
| 119 | buffer_put_bignum(&buffer, key->rsa->iqmp); |
| 120 | buffer_put_bignum(&buffer, key->rsa->q); /* reverse from SSL p */ |
| 121 | buffer_put_bignum(&buffer, key->rsa->p); /* reverse from SSL q */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 122 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 123 | /* Pad the part to be encrypted until its size is a multiple of 8. */ |
| 124 | while (buffer_len(&buffer) % 8 != 0) |
| 125 | buffer_put_char(&buffer, 0); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 126 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 127 | /* This buffer will be used to contain the data in the file. */ |
| 128 | buffer_init(&encrypted); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 129 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 130 | /* First store keyfile id string. */ |
Ben Lindstrom | 1170d71 | 2001-01-29 07:51:26 +0000 | [diff] [blame] | 131 | for (i = 0; authfile_id_string[i]; i++) |
| 132 | buffer_put_char(&encrypted, authfile_id_string[i]); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 133 | buffer_put_char(&encrypted, 0); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 134 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 135 | /* Store cipher type. */ |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 136 | buffer_put_char(&encrypted, cipher_num); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 137 | buffer_put_int(&encrypted, 0); /* For future extension */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 138 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 139 | /* Store public key. This will be in plain text. */ |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 140 | buffer_put_int(&encrypted, BN_num_bits(key->rsa->n)); |
| 141 | buffer_put_bignum(&encrypted, key->rsa->n); |
| 142 | buffer_put_bignum(&encrypted, key->rsa->e); |
Ben Lindstrom | 664408d | 2001-06-09 01:42:01 +0000 | [diff] [blame] | 143 | buffer_put_cstring(&encrypted, comment); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 144 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 145 | /* Allocate space for the private part of the key in the buffer. */ |
Damien Miller | 5a6b4fe | 2001-12-21 14:56:54 +1100 | [diff] [blame] | 146 | cp = buffer_append_space(&encrypted, buffer_len(&buffer)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 147 | |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 148 | cipher_set_key_string(&ciphercontext, cipher, passphrase, |
| 149 | CIPHER_ENCRYPT); |
| 150 | cipher_crypt(&ciphercontext, cp, |
Damien Miller | 708d21c | 2002-01-22 23:18:15 +1100 | [diff] [blame] | 151 | buffer_ptr(&buffer), buffer_len(&buffer)); |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 152 | cipher_cleanup(&ciphercontext); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 153 | memset(&ciphercontext, 0, sizeof(ciphercontext)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 154 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 155 | /* Destroy temporary data. */ |
| 156 | memset(buf, 0, sizeof(buf)); |
| 157 | buffer_free(&buffer); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 158 | |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 159 | buffer_append(blob, buffer_ptr(&encrypted), buffer_len(&encrypted)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 160 | buffer_free(&encrypted); |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 161 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 162 | return 1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 163 | } |
| 164 | |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 165 | /* convert SSH v2 key in OpenSSL PEM format */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 166 | static int |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 167 | key_private_pem_to_blob(Key *key, Buffer *blob, const char *_passphrase, |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 168 | const char *comment) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 169 | { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 170 | int success = 0; |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 171 | int blen, len = strlen(_passphrase); |
Ben Lindstrom | 90fd814 | 2002-02-26 18:09:42 +0000 | [diff] [blame] | 172 | u_char *passphrase = (len > 0) ? (u_char *)_passphrase : NULL; |
Darren Tucker | df6578b | 2009-11-07 16:03:14 +1100 | [diff] [blame] | 173 | #if (OPENSSL_VERSION_NUMBER < 0x00907000L) |
| 174 | const EVP_CIPHER *cipher = (len > 0) ? EVP_des_ede3_cbc() : NULL; |
| 175 | #else |
Darren Tucker | dfb9b71 | 2009-10-24 11:46:43 +1100 | [diff] [blame] | 176 | const EVP_CIPHER *cipher = (len > 0) ? EVP_aes_128_cbc() : NULL; |
Darren Tucker | df6578b | 2009-11-07 16:03:14 +1100 | [diff] [blame] | 177 | #endif |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 178 | const u_char *bptr; |
| 179 | BIO *bio; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 180 | |
| 181 | if (len > 0 && len <= 4) { |
Ben Lindstrom | 15f3386 | 2001-04-16 02:00:02 +0000 | [diff] [blame] | 182 | error("passphrase too short: have %d bytes, need > 4", len); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 183 | return 0; |
| 184 | } |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 185 | if ((bio = BIO_new(BIO_s_mem())) == NULL) { |
| 186 | error("%s: BIO_new failed", __func__); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 187 | return 0; |
| 188 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 189 | switch (key->type) { |
Ben Lindstrom | c111660 | 2001-03-29 00:28:37 +0000 | [diff] [blame] | 190 | case KEY_DSA: |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 191 | success = PEM_write_bio_DSAPrivateKey(bio, key->dsa, |
Ben Lindstrom | c111660 | 2001-03-29 00:28:37 +0000 | [diff] [blame] | 192 | cipher, passphrase, len, NULL, NULL); |
| 193 | break; |
Damien Miller | 6af914a | 2010-09-10 11:39:26 +1000 | [diff] [blame] | 194 | #ifdef OPENSSL_HAS_ECC |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 195 | case KEY_ECDSA: |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 196 | success = PEM_write_bio_ECPrivateKey(bio, key->ecdsa, |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 197 | cipher, passphrase, len, NULL, NULL); |
| 198 | break; |
Damien Miller | 6af914a | 2010-09-10 11:39:26 +1000 | [diff] [blame] | 199 | #endif |
Ben Lindstrom | c111660 | 2001-03-29 00:28:37 +0000 | [diff] [blame] | 200 | case KEY_RSA: |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 201 | success = PEM_write_bio_RSAPrivateKey(bio, key->rsa, |
Ben Lindstrom | c111660 | 2001-03-29 00:28:37 +0000 | [diff] [blame] | 202 | cipher, passphrase, len, NULL, NULL); |
| 203 | break; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 204 | } |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 205 | if (success) { |
| 206 | if ((blen = BIO_get_mem_data(bio, &bptr)) <= 0) |
| 207 | success = 0; |
| 208 | else |
| 209 | buffer_append(blob, bptr, blen); |
| 210 | } |
| 211 | BIO_free(bio); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 212 | return success; |
| 213 | } |
| 214 | |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 215 | /* Save a key blob to a file */ |
| 216 | static int |
| 217 | key_save_private_blob(Buffer *keybuf, const char *filename) |
| 218 | { |
| 219 | int fd; |
| 220 | |
| 221 | if ((fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) { |
| 222 | error("open %s failed: %s.", filename, strerror(errno)); |
| 223 | return 0; |
| 224 | } |
| 225 | if (atomicio(vwrite, fd, buffer_ptr(keybuf), |
| 226 | buffer_len(keybuf)) != buffer_len(keybuf)) { |
| 227 | error("write to key file %s failed: %s", filename, |
| 228 | strerror(errno)); |
| 229 | close(fd); |
| 230 | unlink(filename); |
| 231 | return 0; |
| 232 | } |
| 233 | close(fd); |
| 234 | return 1; |
| 235 | } |
| 236 | |
| 237 | /* Serialise "key" to buffer "blob" */ |
| 238 | static int |
| 239 | key_private_to_blob(Key *key, Buffer *blob, const char *passphrase, |
| 240 | const char *comment) |
| 241 | { |
| 242 | switch (key->type) { |
| 243 | case KEY_RSA1: |
| 244 | return key_private_rsa1_to_blob(key, blob, passphrase, comment); |
| 245 | case KEY_DSA: |
| 246 | case KEY_ECDSA: |
| 247 | case KEY_RSA: |
| 248 | return key_private_pem_to_blob(key, blob, passphrase, comment); |
| 249 | default: |
| 250 | error("%s: cannot save key type %d", __func__, key->type); |
| 251 | return 0; |
| 252 | } |
| 253 | } |
| 254 | |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 255 | int |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 256 | key_save_private(Key *key, const char *filename, const char *passphrase, |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 257 | const char *comment) |
| 258 | { |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 259 | Buffer keyblob; |
| 260 | int success = 0; |
| 261 | |
| 262 | buffer_init(&keyblob); |
| 263 | if (!key_private_to_blob(key, &keyblob, passphrase, comment)) |
| 264 | goto out; |
| 265 | if (!key_save_private_blob(&keyblob, filename)) |
| 266 | goto out; |
| 267 | success = 1; |
| 268 | out: |
| 269 | buffer_free(&keyblob); |
| 270 | return success; |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * Parse the public, unencrypted portion of a RSA1 key. |
| 275 | */ |
| 276 | static Key * |
| 277 | key_parse_public_rsa1(Buffer *blob, char **commentp) |
| 278 | { |
| 279 | Key *pub; |
| 280 | |
| 281 | /* Check that it is at least big enough to contain the ID string. */ |
| 282 | if (buffer_len(blob) < sizeof(authfile_id_string)) { |
| 283 | debug3("Truncated RSA1 identifier"); |
| 284 | return NULL; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 285 | } |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 286 | |
| 287 | /* |
| 288 | * Make sure it begins with the id string. Consume the id string |
| 289 | * from the buffer. |
| 290 | */ |
| 291 | if (memcmp(buffer_ptr(blob), authfile_id_string, |
| 292 | sizeof(authfile_id_string)) != 0) { |
| 293 | debug3("Incorrect RSA1 identifier"); |
| 294 | return NULL; |
| 295 | } |
| 296 | buffer_consume(blob, sizeof(authfile_id_string)); |
| 297 | |
| 298 | /* Skip cipher type and reserved data. */ |
| 299 | (void) buffer_get_char(blob); /* cipher type */ |
| 300 | (void) buffer_get_int(blob); /* reserved */ |
| 301 | |
| 302 | /* Read the public key from the buffer. */ |
| 303 | (void) buffer_get_int(blob); |
| 304 | pub = key_new(KEY_RSA1); |
| 305 | buffer_get_bignum(blob, pub->rsa->n); |
| 306 | buffer_get_bignum(blob, pub->rsa->e); |
| 307 | if (commentp) |
| 308 | *commentp = buffer_get_string(blob, NULL); |
| 309 | /* The encrypted private part is not parsed by this function. */ |
| 310 | buffer_clear(blob); |
| 311 | |
| 312 | return pub; |
| 313 | } |
| 314 | |
| 315 | /* Load the contents of a key file into a buffer */ |
| 316 | static int |
| 317 | key_load_file(int fd, const char *filename, Buffer *blob) |
| 318 | { |
| 319 | size_t len; |
| 320 | u_char *cp; |
| 321 | struct stat st; |
| 322 | |
| 323 | if (fstat(fd, &st) < 0) { |
| 324 | error("%s: fstat of key file %.200s%sfailed: %.100s", __func__, |
| 325 | filename == NULL ? "" : filename, |
| 326 | filename == NULL ? "" : " ", |
| 327 | strerror(errno)); |
| 328 | close(fd); |
| 329 | return 0; |
| 330 | } |
| 331 | if (st.st_size > 1*1024*1024) { |
| 332 | error("%s: key file %.200s%stoo large", __func__, |
| 333 | filename == NULL ? "" : filename, |
| 334 | filename == NULL ? "" : " "); |
| 335 | close(fd); |
| 336 | return 0; |
| 337 | } |
| 338 | len = (size_t)st.st_size; /* truncated */ |
| 339 | |
| 340 | buffer_init(blob); |
| 341 | cp = buffer_append_space(blob, len); |
| 342 | |
| 343 | if (atomicio(read, fd, cp, len) != len) { |
| 344 | debug("%s: read from key file %.200s%sfailed: %.100s", __func__, |
| 345 | filename == NULL ? "" : filename, |
| 346 | filename == NULL ? "" : " ", |
| 347 | strerror(errno)); |
| 348 | buffer_clear(blob); |
| 349 | close(fd); |
| 350 | return 0; |
| 351 | } |
| 352 | return 1; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 353 | } |
| 354 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 355 | /* |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 356 | * Loads the public part of the ssh v1 key file. Returns NULL if an error was |
| 357 | * encountered (the file does not exist or is not readable), and the key |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 358 | * otherwise. |
| 359 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 360 | static Key * |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 361 | key_load_public_rsa1(int fd, const char *filename, char **commentp) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 362 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 363 | Buffer buffer; |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 364 | Key *pub; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 365 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 366 | buffer_init(&buffer); |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 367 | if (!key_load_file(fd, filename, &buffer)) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 368 | buffer_free(&buffer); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 369 | return NULL; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 370 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 371 | |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 372 | pub = key_parse_public_rsa1(&buffer, commentp); |
| 373 | if (pub == NULL) |
| 374 | debug3("Could not load \"%s\" as a RSA1 public key", filename); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 375 | buffer_free(&buffer); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 376 | return pub; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 377 | } |
| 378 | |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 379 | /* load public key from private-key file, works only for SSH v1 */ |
| 380 | Key * |
| 381 | key_load_public_type(int type, const char *filename, char **commentp) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 382 | { |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 383 | Key *pub; |
| 384 | int fd; |
| 385 | |
| 386 | if (type == KEY_RSA1) { |
| 387 | fd = open(filename, O_RDONLY); |
| 388 | if (fd < 0) |
| 389 | return NULL; |
| 390 | pub = key_load_public_rsa1(fd, filename, commentp); |
| 391 | close(fd); |
| 392 | return pub; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 393 | } |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 394 | return NULL; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 395 | } |
| 396 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 397 | static Key * |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 398 | key_parse_private_rsa1(Buffer *blob, const char *passphrase, char **commentp) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 399 | { |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 400 | int check1, check2, cipher_type; |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 401 | Buffer decrypted; |
Damien Miller | 708d21c | 2002-01-22 23:18:15 +1100 | [diff] [blame] | 402 | u_char *cp; |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 403 | CipherContext ciphercontext; |
| 404 | Cipher *cipher; |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 405 | Key *prv = NULL; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 406 | |
Ben Lindstrom | 1170d71 | 2001-01-29 07:51:26 +0000 | [diff] [blame] | 407 | /* Check that it is at least big enough to contain the ID string. */ |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 408 | if (buffer_len(blob) < sizeof(authfile_id_string)) { |
| 409 | debug3("Truncated RSA1 identifier"); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 410 | return NULL; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 411 | } |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 412 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 413 | /* |
| 414 | * Make sure it begins with the id string. Consume the id string |
| 415 | * from the buffer. |
| 416 | */ |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 417 | if (memcmp(buffer_ptr(blob), authfile_id_string, |
| 418 | sizeof(authfile_id_string)) != 0) { |
| 419 | debug3("Incorrect RSA1 identifier"); |
| 420 | return NULL; |
| 421 | } |
| 422 | buffer_consume(blob, sizeof(authfile_id_string)); |
Ben Lindstrom | b257cca | 2001-03-05 04:59:27 +0000 | [diff] [blame] | 423 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 424 | /* Read cipher type. */ |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 425 | cipher_type = buffer_get_char(blob); |
| 426 | (void) buffer_get_int(blob); /* Reserved data. */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 427 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 428 | /* Read the public key from the buffer. */ |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 429 | (void) buffer_get_int(blob); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 430 | prv = key_new_private(KEY_RSA1); |
| 431 | |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 432 | buffer_get_bignum(blob, prv->rsa->n); |
| 433 | buffer_get_bignum(blob, prv->rsa->e); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 434 | if (commentp) |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 435 | *commentp = buffer_get_string(blob, NULL); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 436 | else |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 437 | (void)buffer_get_string_ptr(blob, NULL); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 438 | |
| 439 | /* Check that it is a supported cipher. */ |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 440 | cipher = cipher_by_number(cipher_type); |
| 441 | if (cipher == NULL) { |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 442 | debug("Unsupported RSA1 cipher %d", cipher_type); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 443 | goto fail; |
| 444 | } |
| 445 | /* Initialize space for decrypted data. */ |
| 446 | buffer_init(&decrypted); |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 447 | cp = buffer_append_space(&decrypted, buffer_len(blob)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 448 | |
| 449 | /* Rest of the buffer is encrypted. Decrypt it using the passphrase. */ |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 450 | cipher_set_key_string(&ciphercontext, cipher, passphrase, |
| 451 | CIPHER_DECRYPT); |
| 452 | cipher_crypt(&ciphercontext, cp, |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 453 | buffer_ptr(blob), buffer_len(blob)); |
Damien Miller | 963f6b2 | 2002-02-19 15:21:23 +1100 | [diff] [blame] | 454 | cipher_cleanup(&ciphercontext); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 455 | memset(&ciphercontext, 0, sizeof(ciphercontext)); |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 456 | buffer_clear(blob); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 457 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 458 | check1 = buffer_get_char(&decrypted); |
| 459 | check2 = buffer_get_char(&decrypted); |
| 460 | if (check1 != buffer_get_char(&decrypted) || |
| 461 | check2 != buffer_get_char(&decrypted)) { |
| 462 | if (strcmp(passphrase, "") != 0) |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 463 | debug("Bad passphrase supplied for RSA1 key"); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 464 | /* Bad passphrase. */ |
| 465 | buffer_free(&decrypted); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 466 | goto fail; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 467 | } |
| 468 | /* Read the rest of the private key. */ |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 469 | buffer_get_bignum(&decrypted, prv->rsa->d); |
| 470 | buffer_get_bignum(&decrypted, prv->rsa->iqmp); /* u */ |
| 471 | /* in SSL and SSH v1 p and q are exchanged */ |
| 472 | buffer_get_bignum(&decrypted, prv->rsa->q); /* p */ |
| 473 | buffer_get_bignum(&decrypted, prv->rsa->p); /* q */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 474 | |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 475 | /* calculate p-1 and q-1 */ |
Damien Miller | da75516 | 2002-01-22 23:09:22 +1100 | [diff] [blame] | 476 | rsa_generate_additional_parameters(prv->rsa); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 477 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 478 | buffer_free(&decrypted); |
Damien Miller | ed33d3b | 2003-03-15 11:36:18 +1100 | [diff] [blame] | 479 | |
| 480 | /* enable blinding */ |
| 481 | if (RSA_blinding_on(prv->rsa, NULL) != 1) { |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 482 | error("%s: RSA_blinding_on failed", __func__); |
Damien Miller | ed33d3b | 2003-03-15 11:36:18 +1100 | [diff] [blame] | 483 | goto fail; |
| 484 | } |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 485 | return prv; |
| 486 | |
| 487 | fail: |
| 488 | if (commentp) |
| 489 | xfree(*commentp); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 490 | key_free(prv); |
| 491 | return NULL; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 492 | } |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 493 | |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 494 | static Key * |
| 495 | key_parse_private_pem(Buffer *blob, int type, const char *passphrase, |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 496 | char **commentp) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 497 | { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 498 | EVP_PKEY *pk = NULL; |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 499 | Key *prv = NULL; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 500 | char *name = "<no key>"; |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 501 | BIO *bio; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 502 | |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 503 | if ((bio = BIO_new_mem_buf(buffer_ptr(blob), |
| 504 | buffer_len(blob))) == NULL) { |
| 505 | error("%s: BIO_new_mem_buf failed", __func__); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 506 | return NULL; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 507 | } |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 508 | |
| 509 | pk = PEM_read_bio_PrivateKey(bio, NULL, NULL, (char *)passphrase); |
| 510 | BIO_free(bio); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 511 | if (pk == NULL) { |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 512 | debug("%s: PEM_read_PrivateKey failed", __func__); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 513 | (void)ERR_get_error(); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 514 | } else if (pk->type == EVP_PKEY_RSA && |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 515 | (type == KEY_UNSPEC||type==KEY_RSA)) { |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 516 | prv = key_new(KEY_UNSPEC); |
| 517 | prv->rsa = EVP_PKEY_get1_RSA(pk); |
| 518 | prv->type = KEY_RSA; |
| 519 | name = "rsa w/o comment"; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 520 | #ifdef DEBUG_PK |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 521 | RSA_print_fp(stderr, prv->rsa, 8); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 522 | #endif |
Damien Miller | ed33d3b | 2003-03-15 11:36:18 +1100 | [diff] [blame] | 523 | if (RSA_blinding_on(prv->rsa, NULL) != 1) { |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 524 | error("%s: RSA_blinding_on failed", __func__); |
Damien Miller | ed33d3b | 2003-03-15 11:36:18 +1100 | [diff] [blame] | 525 | key_free(prv); |
| 526 | prv = NULL; |
| 527 | } |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 528 | } else if (pk->type == EVP_PKEY_DSA && |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 529 | (type == KEY_UNSPEC||type==KEY_DSA)) { |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 530 | prv = key_new(KEY_UNSPEC); |
| 531 | prv->dsa = EVP_PKEY_get1_DSA(pk); |
| 532 | prv->type = KEY_DSA; |
| 533 | name = "dsa w/o comment"; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 534 | #ifdef DEBUG_PK |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 535 | DSA_print_fp(stderr, prv->dsa, 8); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 536 | #endif |
Damien Miller | 6af914a | 2010-09-10 11:39:26 +1000 | [diff] [blame] | 537 | #ifdef OPENSSL_HAS_ECC |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 538 | } else if (pk->type == EVP_PKEY_EC && |
| 539 | (type == KEY_UNSPEC||type==KEY_ECDSA)) { |
| 540 | prv = key_new(KEY_UNSPEC); |
| 541 | prv->ecdsa = EVP_PKEY_get1_EC_KEY(pk); |
| 542 | prv->type = KEY_ECDSA; |
Damien Miller | b472a90 | 2010-11-05 10:19:49 +1100 | [diff] [blame] | 543 | if ((prv->ecdsa_nid = key_ecdsa_key_to_nid(prv->ecdsa)) == -1 || |
| 544 | key_curve_nid_to_name(prv->ecdsa_nid) == NULL || |
| 545 | key_ec_validate_public(EC_KEY_get0_group(prv->ecdsa), |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 546 | EC_KEY_get0_public_key(prv->ecdsa)) != 0 || |
| 547 | key_ec_validate_private(prv->ecdsa) != 0) { |
| 548 | error("%s: bad ECDSA key", __func__); |
| 549 | key_free(prv); |
| 550 | prv = NULL; |
| 551 | } |
Damien Miller | bf0423e | 2010-09-10 11:20:38 +1000 | [diff] [blame] | 552 | name = "ecdsa w/o comment"; |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 553 | #ifdef DEBUG_PK |
Damien Miller | b472a90 | 2010-11-05 10:19:49 +1100 | [diff] [blame] | 554 | if (prv != NULL && prv->ecdsa != NULL) |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 555 | key_dump_ec_key(prv->ecdsa); |
| 556 | #endif |
Damien Miller | 6af914a | 2010-09-10 11:39:26 +1000 | [diff] [blame] | 557 | #endif /* OPENSSL_HAS_ECC */ |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 558 | } else { |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 559 | error("%s: PEM_read_PrivateKey: mismatch or " |
| 560 | "unknown EVP_PKEY save_type %d", __func__, pk->save_type); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 561 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 562 | if (pk != NULL) |
| 563 | EVP_PKEY_free(pk); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 564 | if (prv != NULL && commentp) |
| 565 | *commentp = xstrdup(name); |
| 566 | debug("read PEM private key done: type %s", |
| 567 | prv ? key_type(prv) : "<unknown>"); |
| 568 | return prv; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 569 | } |
| 570 | |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 571 | Key * |
| 572 | key_load_private_pem(int fd, int type, const char *passphrase, |
| 573 | char **commentp) |
| 574 | { |
| 575 | Buffer buffer; |
| 576 | Key *prv; |
| 577 | |
| 578 | buffer_init(&buffer); |
| 579 | if (!key_load_file(fd, NULL, &buffer)) { |
| 580 | buffer_free(&buffer); |
| 581 | return NULL; |
| 582 | } |
| 583 | prv = key_parse_private_pem(&buffer, type, passphrase, commentp); |
| 584 | buffer_free(&buffer); |
| 585 | return prv; |
| 586 | } |
| 587 | |
Damien Miller | 8275fad | 2006-03-15 12:06:23 +1100 | [diff] [blame] | 588 | int |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 589 | key_perm_ok(int fd, const char *filename) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 590 | { |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 591 | struct stat st; |
| 592 | |
Ben Lindstrom | 7aff261 | 2001-09-23 13:53:22 +0000 | [diff] [blame] | 593 | if (fstat(fd, &st) < 0) |
| 594 | return 0; |
| 595 | /* |
| 596 | * if a key owned by the user is accessed, then we check the |
| 597 | * permissions of the file. if the key owned by a different user, |
| 598 | * then we don't care. |
| 599 | */ |
Damien Miller | b70b61f | 2000-09-16 16:25:12 +1100 | [diff] [blame] | 600 | #ifdef HAVE_CYGWIN |
Damien Miller | cb5e44a | 2000-09-29 12:12:36 +1100 | [diff] [blame] | 601 | if (check_ntsec(filename)) |
Damien Miller | b70b61f | 2000-09-16 16:25:12 +1100 | [diff] [blame] | 602 | #endif |
Ben Lindstrom | 7aff261 | 2001-09-23 13:53:22 +0000 | [diff] [blame] | 603 | if ((st.st_uid == getuid()) && (st.st_mode & 077) != 0) { |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 604 | error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); |
| 605 | error("@ WARNING: UNPROTECTED PRIVATE KEY FILE! @"); |
| 606 | error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); |
Ben Lindstrom | 7aff261 | 2001-09-23 13:53:22 +0000 | [diff] [blame] | 607 | error("Permissions 0%3.3o for '%s' are too open.", |
Damien Miller | 04bd8b0 | 2003-05-25 14:38:33 +1000 | [diff] [blame] | 608 | (u_int)st.st_mode & 0777, filename); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 609 | error("It is recommended that your private key files are NOT accessible by others."); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 610 | error("This private key will be ignored."); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 611 | return 0; |
| 612 | } |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 613 | return 1; |
| 614 | } |
Ben Lindstrom | b257cca | 2001-03-05 04:59:27 +0000 | [diff] [blame] | 615 | |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 616 | static Key * |
| 617 | key_parse_private_type(Buffer *blob, int type, const char *passphrase, |
| 618 | char **commentp) |
| 619 | { |
| 620 | switch (type) { |
| 621 | case KEY_RSA1: |
| 622 | return key_parse_private_rsa1(blob, passphrase, commentp); |
| 623 | case KEY_DSA: |
| 624 | case KEY_ECDSA: |
| 625 | case KEY_RSA: |
| 626 | case KEY_UNSPEC: |
| 627 | return key_parse_private_pem(blob, type, passphrase, commentp); |
| 628 | default: |
| 629 | break; |
| 630 | } |
| 631 | return NULL; |
| 632 | } |
| 633 | |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 634 | Key * |
| 635 | key_load_private_type(int type, const char *filename, const char *passphrase, |
Darren Tucker | 232b76f | 2006-05-06 17:41:51 +1000 | [diff] [blame] | 636 | char **commentp, int *perm_ok) |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 637 | { |
| 638 | int fd; |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 639 | Key *ret; |
| 640 | Buffer buffer; |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 641 | |
| 642 | fd = open(filename, O_RDONLY); |
Darren Tucker | d4c86b1 | 2010-01-12 19:41:22 +1100 | [diff] [blame] | 643 | if (fd < 0) { |
| 644 | debug("could not open key file '%s': %s", filename, |
| 645 | strerror(errno)); |
| 646 | if (perm_ok != NULL) |
| 647 | *perm_ok = 0; |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 648 | return NULL; |
Darren Tucker | 69c01b1 | 2010-01-12 19:42:29 +1100 | [diff] [blame] | 649 | } |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 650 | if (!key_perm_ok(fd, filename)) { |
Darren Tucker | 232b76f | 2006-05-06 17:41:51 +1000 | [diff] [blame] | 651 | if (perm_ok != NULL) |
| 652 | *perm_ok = 0; |
Ben Lindstrom | 15f3386 | 2001-04-16 02:00:02 +0000 | [diff] [blame] | 653 | error("bad permissions: ignore key: %s", filename); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 654 | close(fd); |
| 655 | return NULL; |
| 656 | } |
Darren Tucker | 232b76f | 2006-05-06 17:41:51 +1000 | [diff] [blame] | 657 | if (perm_ok != NULL) |
| 658 | *perm_ok = 1; |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 659 | |
| 660 | buffer_init(&buffer); |
| 661 | if (!key_load_file(fd, filename, &buffer)) { |
| 662 | buffer_free(&buffer); |
Ben Lindstrom | b257cca | 2001-03-05 04:59:27 +0000 | [diff] [blame] | 663 | close(fd); |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 664 | return NULL; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 665 | } |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 666 | close(fd); |
| 667 | ret = key_parse_private_type(&buffer, type, passphrase, commentp); |
| 668 | buffer_free(&buffer); |
| 669 | return ret; |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 670 | } |
| 671 | |
| 672 | Key * |
| 673 | key_load_private(const char *filename, const char *passphrase, |
| 674 | char **commentp) |
| 675 | { |
Ben Lindstrom | 322915d | 2001-06-05 20:46:32 +0000 | [diff] [blame] | 676 | Key *pub, *prv; |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 677 | Buffer buffer, pubcopy; |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 678 | int fd; |
| 679 | |
| 680 | fd = open(filename, O_RDONLY); |
Darren Tucker | d4c86b1 | 2010-01-12 19:41:22 +1100 | [diff] [blame] | 681 | if (fd < 0) { |
| 682 | debug("could not open key file '%s': %s", filename, |
| 683 | strerror(errno)); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 684 | return NULL; |
Darren Tucker | d4c86b1 | 2010-01-12 19:41:22 +1100 | [diff] [blame] | 685 | } |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 686 | if (!key_perm_ok(fd, filename)) { |
Ben Lindstrom | 15f3386 | 2001-04-16 02:00:02 +0000 | [diff] [blame] | 687 | error("bad permissions: ignore key: %s", filename); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 688 | close(fd); |
| 689 | return NULL; |
| 690 | } |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 691 | |
| 692 | buffer_init(&buffer); |
| 693 | if (!key_load_file(fd, filename, &buffer)) { |
| 694 | buffer_free(&buffer); |
| 695 | close(fd); |
| 696 | return NULL; |
| 697 | } |
| 698 | close(fd); |
| 699 | |
| 700 | buffer_init(&pubcopy); |
| 701 | buffer_append(&pubcopy, buffer_ptr(&buffer), buffer_len(&buffer)); |
| 702 | /* it's a SSH v1 key if the public key part is readable */ |
| 703 | pub = key_parse_public_rsa1(&pubcopy, commentp); |
| 704 | buffer_free(&pubcopy); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 705 | if (pub == NULL) { |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 706 | prv = key_parse_private_type(&buffer, KEY_UNSPEC, |
| 707 | passphrase, NULL); |
Ben Lindstrom | 322915d | 2001-06-05 20:46:32 +0000 | [diff] [blame] | 708 | /* use the filename as a comment for PEM */ |
| 709 | if (commentp && prv) |
Ben Lindstrom | 2d0356f | 2001-06-05 21:13:57 +0000 | [diff] [blame] | 710 | *commentp = xstrdup(filename); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 711 | } else { |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 712 | key_free(pub); |
Damien Miller | 03c0e53 | 2010-12-01 12:03:39 +1100 | [diff] [blame] | 713 | /* key_parse_public_rsa1() has already loaded the comment */ |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 714 | prv = key_parse_private_type(&buffer, KEY_RSA1, passphrase, |
Damien Miller | 03c0e53 | 2010-12-01 12:03:39 +1100 | [diff] [blame] | 715 | NULL); |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 716 | } |
Damien Miller | a232792 | 2010-12-01 12:01:21 +1100 | [diff] [blame] | 717 | buffer_free(&buffer); |
Ben Lindstrom | 322915d | 2001-06-05 20:46:32 +0000 | [diff] [blame] | 718 | return prv; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 719 | } |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 720 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 721 | static int |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 722 | key_try_load_public(Key *k, const char *filename, char **commentp) |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 723 | { |
| 724 | FILE *f; |
Darren Tucker | 22cc741 | 2004-12-06 22:47:41 +1100 | [diff] [blame] | 725 | char line[SSH_MAX_PUBKEY_BYTES]; |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 726 | char *cp; |
Darren Tucker | f0f9098 | 2004-12-11 13:39:50 +1100 | [diff] [blame] | 727 | u_long linenum = 0; |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 728 | |
| 729 | f = fopen(filename, "r"); |
| 730 | if (f != NULL) { |
Darren Tucker | 22cc741 | 2004-12-06 22:47:41 +1100 | [diff] [blame] | 731 | while (read_keyfile_line(f, filename, line, sizeof(line), |
| 732 | &linenum) != -1) { |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 733 | cp = line; |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 734 | switch (*cp) { |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 735 | case '#': |
| 736 | case '\n': |
| 737 | case '\0': |
| 738 | continue; |
| 739 | } |
| 740 | /* Skip leading whitespace. */ |
| 741 | for (; *cp && (*cp == ' ' || *cp == '\t'); cp++) |
| 742 | ; |
| 743 | if (*cp) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 744 | if (key_read(k, &cp) == 1) { |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 745 | if (commentp) |
| 746 | *commentp=xstrdup(filename); |
| 747 | fclose(f); |
| 748 | return 1; |
| 749 | } |
| 750 | } |
| 751 | } |
| 752 | fclose(f); |
| 753 | } |
| 754 | return 0; |
| 755 | } |
| 756 | |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 757 | /* load public key from ssh v1 private or any pubkey file */ |
| 758 | Key * |
| 759 | key_load_public(const char *filename, char **commentp) |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 760 | { |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 761 | Key *pub; |
| 762 | char file[MAXPATHLEN]; |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 763 | |
Damien Miller | db27472 | 2003-05-14 13:45:22 +1000 | [diff] [blame] | 764 | /* try rsa1 private key */ |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 765 | pub = key_load_public_type(KEY_RSA1, filename, commentp); |
| 766 | if (pub != NULL) |
| 767 | return pub; |
Damien Miller | db27472 | 2003-05-14 13:45:22 +1000 | [diff] [blame] | 768 | |
| 769 | /* try rsa1 public key */ |
| 770 | pub = key_new(KEY_RSA1); |
| 771 | if (key_try_load_public(pub, filename, commentp) == 1) |
| 772 | return pub; |
| 773 | key_free(pub); |
| 774 | |
| 775 | /* try ssh2 public key */ |
Ben Lindstrom | d0fca42 | 2001-03-26 13:44:06 +0000 | [diff] [blame] | 776 | pub = key_new(KEY_UNSPEC); |
| 777 | if (key_try_load_public(pub, filename, commentp) == 1) |
| 778 | return pub; |
| 779 | if ((strlcpy(file, filename, sizeof file) < sizeof(file)) && |
| 780 | (strlcat(file, ".pub", sizeof file) < sizeof(file)) && |
| 781 | (key_try_load_public(pub, file, commentp) == 1)) |
| 782 | return pub; |
| 783 | key_free(pub); |
| 784 | return NULL; |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 785 | } |
Damien Miller | 1aed65e | 2010-03-04 21:53:35 +1100 | [diff] [blame] | 786 | |
Damien Miller | c158331 | 2010-08-05 13:04:50 +1000 | [diff] [blame] | 787 | /* Load the certificate associated with the named private key */ |
| 788 | Key * |
| 789 | key_load_cert(const char *filename) |
| 790 | { |
| 791 | Key *pub; |
Damien Miller | 5458c4d | 2010-08-05 13:05:15 +1000 | [diff] [blame] | 792 | char *file; |
Damien Miller | c158331 | 2010-08-05 13:04:50 +1000 | [diff] [blame] | 793 | |
| 794 | pub = key_new(KEY_UNSPEC); |
Damien Miller | 5458c4d | 2010-08-05 13:05:15 +1000 | [diff] [blame] | 795 | xasprintf(&file, "%s-cert.pub", filename); |
| 796 | if (key_try_load_public(pub, file, NULL) == 1) { |
| 797 | xfree(file); |
Damien Miller | c158331 | 2010-08-05 13:04:50 +1000 | [diff] [blame] | 798 | return pub; |
Damien Miller | 5458c4d | 2010-08-05 13:05:15 +1000 | [diff] [blame] | 799 | } |
| 800 | xfree(file); |
Damien Miller | c158331 | 2010-08-05 13:04:50 +1000 | [diff] [blame] | 801 | key_free(pub); |
| 802 | return NULL; |
| 803 | } |
| 804 | |
| 805 | /* Load private key and certificate */ |
| 806 | Key * |
| 807 | key_load_private_cert(int type, const char *filename, const char *passphrase, |
| 808 | int *perm_ok) |
| 809 | { |
| 810 | Key *key, *pub; |
| 811 | |
| 812 | switch (type) { |
| 813 | case KEY_RSA: |
| 814 | case KEY_DSA: |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 815 | case KEY_ECDSA: |
Damien Miller | c158331 | 2010-08-05 13:04:50 +1000 | [diff] [blame] | 816 | break; |
| 817 | default: |
| 818 | error("%s: unsupported key type", __func__); |
| 819 | return NULL; |
| 820 | } |
| 821 | |
| 822 | if ((key = key_load_private_type(type, filename, |
| 823 | passphrase, NULL, perm_ok)) == NULL) |
| 824 | return NULL; |
| 825 | |
| 826 | if ((pub = key_load_cert(filename)) == NULL) { |
| 827 | key_free(key); |
| 828 | return NULL; |
| 829 | } |
| 830 | |
| 831 | /* Make sure the private key matches the certificate */ |
| 832 | if (key_equal_public(key, pub) == 0) { |
| 833 | error("%s: certificate does not match private key %s", |
| 834 | __func__, filename); |
| 835 | } else if (key_to_certified(key, key_cert_is_legacy(pub)) != 0) { |
| 836 | error("%s: key_to_certified failed", __func__); |
| 837 | } else { |
| 838 | key_cert_copy(pub, key); |
| 839 | key_free(pub); |
| 840 | return key; |
| 841 | } |
| 842 | |
| 843 | key_free(key); |
| 844 | key_free(pub); |
| 845 | return NULL; |
| 846 | } |
| 847 | |
Damien Miller | 1aed65e | 2010-03-04 21:53:35 +1100 | [diff] [blame] | 848 | /* |
| 849 | * Returns 1 if the specified "key" is listed in the file "filename", |
| 850 | * 0 if the key is not listed or -1 on error. |
| 851 | * If strict_type is set then the key type must match exactly, |
| 852 | * otherwise a comparison that ignores certficiate data is performed. |
| 853 | */ |
| 854 | int |
| 855 | key_in_file(Key *key, const char *filename, int strict_type) |
| 856 | { |
| 857 | FILE *f; |
| 858 | char line[SSH_MAX_PUBKEY_BYTES]; |
| 859 | char *cp; |
| 860 | u_long linenum = 0; |
| 861 | int ret = 0; |
| 862 | Key *pub; |
| 863 | int (*key_compare)(const Key *, const Key *) = strict_type ? |
| 864 | key_equal : key_equal_public; |
| 865 | |
| 866 | if ((f = fopen(filename, "r")) == NULL) { |
| 867 | if (errno == ENOENT) { |
| 868 | debug("%s: keyfile \"%s\" missing", __func__, filename); |
| 869 | return 0; |
| 870 | } else { |
| 871 | error("%s: could not open keyfile \"%s\": %s", __func__, |
| 872 | filename, strerror(errno)); |
| 873 | return -1; |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | while (read_keyfile_line(f, filename, line, sizeof(line), |
| 878 | &linenum) != -1) { |
| 879 | cp = line; |
| 880 | |
| 881 | /* Skip leading whitespace. */ |
| 882 | for (; *cp && (*cp == ' ' || *cp == '\t'); cp++) |
| 883 | ; |
| 884 | |
| 885 | /* Skip comments and empty lines */ |
| 886 | switch (*cp) { |
| 887 | case '#': |
| 888 | case '\n': |
| 889 | case '\0': |
| 890 | continue; |
| 891 | } |
| 892 | |
| 893 | pub = key_new(KEY_UNSPEC); |
| 894 | if (key_read(pub, &cp) != 1) { |
| 895 | key_free(pub); |
| 896 | continue; |
| 897 | } |
| 898 | if (key_compare(key, pub)) { |
| 899 | ret = 1; |
| 900 | key_free(pub); |
| 901 | break; |
| 902 | } |
| 903 | key_free(pub); |
| 904 | } |
| 905 | fclose(f); |
| 906 | return ret; |
| 907 | } |
| 908 | |