Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 2 | * All rights reserved. |
| 3 | * |
| 4 | * This package is an SSL implementation written |
| 5 | * by Eric Young (eay@cryptsoft.com). |
| 6 | * The implementation was written so as to conform with Netscapes SSL. |
| 7 | * |
| 8 | * This library is free for commercial and non-commercial use as long as |
| 9 | * the following conditions are aheared to. The following conditions |
| 10 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 12 | * included with this distribution is covered by the same copyright terms |
| 13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 14 | * |
| 15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 16 | * the code are not to be removed. |
| 17 | * If this package is used in a product, Eric Young should be given attribution |
| 18 | * as the author of the parts of the library used. |
| 19 | * This can be in the form of a textual message at program startup or |
| 20 | * in documentation (online or textual) provided with the package. |
| 21 | * |
| 22 | * Redistribution and use in source and binary forms, with or without |
| 23 | * modification, are permitted provided that the following conditions |
| 24 | * are met: |
| 25 | * 1. Redistributions of source code must retain the copyright |
| 26 | * notice, this list of conditions and the following disclaimer. |
| 27 | * 2. Redistributions in binary form must reproduce the above copyright |
| 28 | * notice, this list of conditions and the following disclaimer in the |
| 29 | * documentation and/or other materials provided with the distribution. |
| 30 | * 3. All advertising materials mentioning features or use of this software |
| 31 | * must display the following acknowledgement: |
| 32 | * "This product includes cryptographic software written by |
| 33 | * Eric Young (eay@cryptsoft.com)" |
| 34 | * The word 'cryptographic' can be left out if the rouines from the library |
| 35 | * being used are not cryptographic related :-). |
| 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 37 | * the apps directory (application code) you must include an acknowledgement: |
| 38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 39 | * |
| 40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 50 | * SUCH DAMAGE. |
| 51 | * |
| 52 | * The licence and distribution terms for any publically available version or |
| 53 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 54 | * copied and put under another distribution licence |
| 55 | * [including the GNU Public Licence.] |
| 56 | */ |
| 57 | /* ==================================================================== |
| 58 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
| 59 | * |
| 60 | * Redistribution and use in source and binary forms, with or without |
| 61 | * modification, are permitted provided that the following conditions |
| 62 | * are met: |
| 63 | * |
| 64 | * 1. Redistributions of source code must retain the above copyright |
| 65 | * notice, this list of conditions and the following disclaimer. |
| 66 | * |
| 67 | * 2. Redistributions in binary form must reproduce the above copyright |
| 68 | * notice, this list of conditions and the following disclaimer in |
| 69 | * the documentation and/or other materials provided with the |
| 70 | * distribution. |
| 71 | * |
| 72 | * 3. All advertising materials mentioning features or use of this |
| 73 | * software must display the following acknowledgment: |
| 74 | * "This product includes software developed by the OpenSSL Project |
| 75 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 76 | * |
| 77 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 78 | * endorse or promote products derived from this software without |
| 79 | * prior written permission. For written permission, please contact |
| 80 | * openssl-core@openssl.org. |
| 81 | * |
| 82 | * 5. Products derived from this software may not be called "OpenSSL" |
| 83 | * nor may "OpenSSL" appear in their names without prior written |
| 84 | * permission of the OpenSSL Project. |
| 85 | * |
| 86 | * 6. Redistributions of any form whatsoever must retain the following |
| 87 | * acknowledgment: |
| 88 | * "This product includes software developed by the OpenSSL Project |
| 89 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 90 | * |
| 91 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 92 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 93 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 94 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 95 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 96 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 97 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 98 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 99 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 100 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 101 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 102 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 103 | * ==================================================================== |
| 104 | * |
| 105 | * This product includes cryptographic software written by Eric Young |
| 106 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 107 | * Hudson (tjh@cryptsoft.com). |
| 108 | * |
| 109 | */ |
| 110 | /* ==================================================================== |
| 111 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| 112 | * ECC cipher suite support in OpenSSL originally developed by |
| 113 | * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */ |
| 114 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 115 | #include <openssl/ssl.h> |
| 116 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 117 | #include <assert.h> |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 118 | #include <limits.h> |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 119 | #include <string.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 120 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 121 | #include <openssl/bn.h> |
| 122 | #include <openssl/buf.h> |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 123 | #include <openssl/bytestring.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 124 | #include <openssl/dh.h> |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 125 | #include <openssl/ec_key.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 126 | #include <openssl/err.h> |
| 127 | #include <openssl/mem.h> |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 128 | #include <openssl/sha.h> |
Adam Langley | 56d2503 | 2015-06-23 16:20:13 -0700 | [diff] [blame] | 129 | #include <openssl/x509.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 130 | |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 131 | #include "../crypto/internal.h" |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 132 | #include "internal.h" |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 133 | |
| 134 | |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 135 | CERT *ssl_cert_new(const SSL_X509_METHOD *x509_method) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 136 | CERT *ret = OPENSSL_malloc(sizeof(CERT)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 137 | if (ret == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 138 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 139 | return NULL; |
| 140 | } |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 141 | OPENSSL_memset(ret, 0, sizeof(CERT)); |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 142 | ret->x509_method = x509_method; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 143 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 144 | return ret; |
| 145 | } |
| 146 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 147 | static CRYPTO_BUFFER *buffer_up_ref(CRYPTO_BUFFER *buffer) { |
| 148 | CRYPTO_BUFFER_up_ref(buffer); |
| 149 | return buffer; |
| 150 | } |
| 151 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 152 | CERT *ssl_cert_dup(CERT *cert) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 153 | CERT *ret = OPENSSL_malloc(sizeof(CERT)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 154 | if (ret == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 155 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 156 | return NULL; |
| 157 | } |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 158 | OPENSSL_memset(ret, 0, sizeof(CERT)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 159 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 160 | ret->chain = sk_CRYPTO_BUFFER_deep_copy(cert->chain, buffer_up_ref, |
| 161 | CRYPTO_BUFFER_free); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 162 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 163 | if (cert->privatekey != NULL) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 164 | EVP_PKEY_up_ref(cert->privatekey); |
| 165 | ret->privatekey = cert->privatekey; |
Kenny Root | a04d78d | 2015-09-25 00:26:37 +0000 | [diff] [blame] | 166 | } |
| 167 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 168 | ret->key_method = cert->key_method; |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 169 | ret->x509_method = cert->x509_method; |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 170 | |
David Benjamin | f0c4a6c | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 171 | if (cert->dh_tmp != NULL) { |
| 172 | ret->dh_tmp = DHparams_dup(cert->dh_tmp); |
| 173 | if (ret->dh_tmp == NULL) { |
| 174 | OPENSSL_PUT_ERROR(SSL, ERR_R_DH_LIB); |
| 175 | goto err; |
| 176 | } |
| 177 | } |
| 178 | ret->dh_tmp_cb = cert->dh_tmp_cb; |
| 179 | |
| 180 | if (cert->sigalgs != NULL) { |
| 181 | ret->sigalgs = |
| 182 | BUF_memdup(cert->sigalgs, cert->num_sigalgs * sizeof(cert->sigalgs[0])); |
| 183 | if (ret->sigalgs == NULL) { |
| 184 | goto err; |
| 185 | } |
| 186 | } |
| 187 | ret->num_sigalgs = cert->num_sigalgs; |
| 188 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 189 | ret->cert_cb = cert->cert_cb; |
| 190 | ret->cert_cb_arg = cert->cert_cb_arg; |
| 191 | |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 192 | ret->x509_method->cert_dup(ret, cert); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 193 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 194 | if (cert->signed_cert_timestamp_list != NULL) { |
| 195 | CRYPTO_BUFFER_up_ref(cert->signed_cert_timestamp_list); |
| 196 | ret->signed_cert_timestamp_list = cert->signed_cert_timestamp_list; |
| 197 | } |
| 198 | |
| 199 | if (cert->ocsp_response != NULL) { |
| 200 | CRYPTO_BUFFER_up_ref(cert->ocsp_response); |
| 201 | ret->ocsp_response = cert->ocsp_response; |
| 202 | } |
| 203 | |
| 204 | ret->sid_ctx_length = cert->sid_ctx_length; |
| 205 | OPENSSL_memcpy(ret->sid_ctx, cert->sid_ctx, sizeof(ret->sid_ctx)); |
| 206 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 207 | return ret; |
| 208 | |
| 209 | err: |
| 210 | ssl_cert_free(ret); |
| 211 | return NULL; |
| 212 | } |
| 213 | |
| 214 | /* Free up and clear all certificates and chains */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 215 | void ssl_cert_clear_certs(CERT *cert) { |
| 216 | if (cert == NULL) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 217 | return; |
| 218 | } |
| 219 | |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 220 | cert->x509_method->cert_clear(cert); |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 221 | |
| 222 | sk_CRYPTO_BUFFER_pop_free(cert->chain, CRYPTO_BUFFER_free); |
| 223 | cert->chain = NULL; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 224 | EVP_PKEY_free(cert->privatekey); |
| 225 | cert->privatekey = NULL; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 226 | cert->key_method = NULL; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | void ssl_cert_free(CERT *c) { |
| 230 | if (c == NULL) { |
| 231 | return; |
| 232 | } |
| 233 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 234 | DH_free(c->dh_tmp); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 235 | |
| 236 | ssl_cert_clear_certs(c); |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 237 | c->x509_method->cert_free(c); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 238 | OPENSSL_free(c->sigalgs); |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 239 | CRYPTO_BUFFER_free(c->signed_cert_timestamp_list); |
| 240 | CRYPTO_BUFFER_free(c->ocsp_response); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 241 | |
| 242 | OPENSSL_free(c); |
| 243 | } |
| 244 | |
David Benjamin | 1b24967 | 2016-12-06 18:25:50 -0500 | [diff] [blame] | 245 | static void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), |
| 246 | void *arg) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 247 | c->cert_cb = cb; |
| 248 | c->cert_cb_arg = arg; |
| 249 | } |
| 250 | |
Robert Sloan | 1c9db53 | 2017-03-13 08:03:59 -0700 | [diff] [blame^] | 251 | enum leaf_cert_and_privkey_result_t { |
| 252 | leaf_cert_and_privkey_error, |
| 253 | leaf_cert_and_privkey_ok, |
| 254 | leaf_cert_and_privkey_mismatch, |
| 255 | }; |
| 256 | |
| 257 | /* check_leaf_cert_and_privkey checks whether the certificate in |leaf_buffer| |
| 258 | * and the private key in |privkey| are suitable and coherent. It returns |
| 259 | * |leaf_cert_and_privkey_error| and pushes to the error queue if a problem is |
| 260 | * found. If the certificate and private key are valid, but incoherent, it |
| 261 | * returns |leaf_cert_and_privkey_mismatch|. Otherwise it returns |
| 262 | * |leaf_cert_and_privkey_ok|. */ |
| 263 | static enum leaf_cert_and_privkey_result_t check_leaf_cert_and_privkey( |
| 264 | CRYPTO_BUFFER *leaf_buffer, EVP_PKEY *privkey) { |
| 265 | enum leaf_cert_and_privkey_result_t ret = leaf_cert_and_privkey_error; |
| 266 | |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 267 | CBS cert_cbs; |
Robert Sloan | 1c9db53 | 2017-03-13 08:03:59 -0700 | [diff] [blame^] | 268 | CRYPTO_BUFFER_init_CBS(leaf_buffer, &cert_cbs); |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 269 | EVP_PKEY *pubkey = ssl_cert_parse_pubkey(&cert_cbs); |
| 270 | if (pubkey == NULL) { |
Robert Sloan | 1c9db53 | 2017-03-13 08:03:59 -0700 | [diff] [blame^] | 271 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| 272 | goto out; |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | if (!ssl_is_key_type_supported(pubkey->type)) { |
| 276 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
Robert Sloan | 1c9db53 | 2017-03-13 08:03:59 -0700 | [diff] [blame^] | 277 | goto out; |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 278 | } |
| 279 | |
| 280 | /* An ECC certificate may be usable for ECDH or ECDSA. We only support ECDSA |
| 281 | * certificates, so sanity-check the key usage extension. */ |
| 282 | if (pubkey->type == EVP_PKEY_EC && |
| 283 | !ssl_cert_check_digital_signature_key_usage(&cert_cbs)) { |
| 284 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
Robert Sloan | 1c9db53 | 2017-03-13 08:03:59 -0700 | [diff] [blame^] | 285 | goto out; |
| 286 | } |
| 287 | |
| 288 | if (privkey != NULL && |
| 289 | /* Sanity-check that the private key and the certificate match. */ |
| 290 | !ssl_compare_public_and_private_key(pubkey, privkey)) { |
| 291 | ERR_clear_error(); |
| 292 | ret = leaf_cert_and_privkey_mismatch; |
| 293 | goto out; |
| 294 | } |
| 295 | |
| 296 | ret = leaf_cert_and_privkey_ok; |
| 297 | |
| 298 | out: |
| 299 | EVP_PKEY_free(pubkey); |
| 300 | return ret; |
| 301 | } |
| 302 | |
| 303 | static int cert_set_chain_and_key( |
| 304 | CERT *cert, CRYPTO_BUFFER *const *certs, size_t num_certs, |
| 305 | EVP_PKEY *privkey, const SSL_PRIVATE_KEY_METHOD *privkey_method) { |
| 306 | if (num_certs == 0 || |
| 307 | (privkey == NULL && privkey_method == NULL)) { |
| 308 | OPENSSL_PUT_ERROR(SSL, ERR_R_PASSED_NULL_PARAMETER); |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 309 | return 0; |
| 310 | } |
| 311 | |
Robert Sloan | 1c9db53 | 2017-03-13 08:03:59 -0700 | [diff] [blame^] | 312 | if (privkey != NULL && privkey_method != NULL) { |
| 313 | OPENSSL_PUT_ERROR(SSL, SSL_R_CANNOT_HAVE_BOTH_PRIVKEY_AND_METHOD); |
| 314 | return 0; |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 315 | } |
| 316 | |
Robert Sloan | 1c9db53 | 2017-03-13 08:03:59 -0700 | [diff] [blame^] | 317 | switch (check_leaf_cert_and_privkey(certs[0], privkey)) { |
| 318 | case leaf_cert_and_privkey_error: |
| 319 | return 0; |
| 320 | case leaf_cert_and_privkey_mismatch: |
| 321 | OPENSSL_PUT_ERROR(SSL, SSL_R_CERTIFICATE_AND_PRIVATE_KEY_MISMATCH); |
| 322 | return 0; |
| 323 | case leaf_cert_and_privkey_ok: |
| 324 | break; |
| 325 | } |
| 326 | |
| 327 | STACK_OF(CRYPTO_BUFFER) *certs_sk = sk_CRYPTO_BUFFER_new_null(); |
| 328 | if (certs_sk == NULL) { |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | for (size_t i = 0; i < num_certs; i++) { |
| 333 | if (!sk_CRYPTO_BUFFER_push(certs_sk, certs[i])) { |
| 334 | sk_CRYPTO_BUFFER_pop_free(certs_sk, CRYPTO_BUFFER_free); |
| 335 | return 0; |
| 336 | } |
| 337 | CRYPTO_BUFFER_up_ref(certs[i]); |
| 338 | } |
| 339 | |
| 340 | EVP_PKEY_free(cert->privatekey); |
| 341 | cert->privatekey = privkey; |
| 342 | if (privkey != NULL) { |
| 343 | EVP_PKEY_up_ref(privkey); |
| 344 | } |
| 345 | cert->key_method = privkey_method; |
| 346 | |
| 347 | sk_CRYPTO_BUFFER_pop_free(cert->chain, CRYPTO_BUFFER_free); |
| 348 | cert->chain = certs_sk; |
| 349 | |
| 350 | return 1; |
| 351 | } |
| 352 | |
| 353 | int SSL_set_chain_and_key(SSL *ssl, CRYPTO_BUFFER *const *certs, |
| 354 | size_t num_certs, EVP_PKEY *privkey, |
| 355 | const SSL_PRIVATE_KEY_METHOD *privkey_method) { |
| 356 | return cert_set_chain_and_key(ssl->cert, certs, num_certs, privkey, |
| 357 | privkey_method); |
| 358 | } |
| 359 | |
| 360 | int SSL_CTX_set_chain_and_key(SSL_CTX *ctx, CRYPTO_BUFFER *const *certs, |
| 361 | size_t num_certs, EVP_PKEY *privkey, |
| 362 | const SSL_PRIVATE_KEY_METHOD *privkey_method) { |
| 363 | return cert_set_chain_and_key(ctx->cert, certs, num_certs, privkey, |
| 364 | privkey_method); |
| 365 | } |
| 366 | |
| 367 | int ssl_set_cert(CERT *cert, CRYPTO_BUFFER *buffer) { |
| 368 | switch (check_leaf_cert_and_privkey(buffer, cert->privatekey)) { |
| 369 | case leaf_cert_and_privkey_error: |
| 370 | return 0; |
| 371 | case leaf_cert_and_privkey_mismatch: |
| 372 | /* don't fail for a cert/key mismatch, just free current private key |
| 373 | * (when switching to a different cert & key, first this function should |
| 374 | * be used, then |ssl_set_pkey|. */ |
| 375 | EVP_PKEY_free(cert->privatekey); |
| 376 | cert->privatekey = NULL; |
| 377 | break; |
| 378 | case leaf_cert_and_privkey_ok: |
| 379 | break; |
| 380 | } |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 381 | |
| 382 | cert->x509_method->cert_flush_cached_leaf(cert); |
| 383 | |
| 384 | if (cert->chain != NULL) { |
| 385 | CRYPTO_BUFFER_free(sk_CRYPTO_BUFFER_value(cert->chain, 0)); |
| 386 | sk_CRYPTO_BUFFER_set(cert->chain, 0, buffer); |
| 387 | CRYPTO_BUFFER_up_ref(buffer); |
| 388 | return 1; |
| 389 | } |
| 390 | |
| 391 | cert->chain = sk_CRYPTO_BUFFER_new_null(); |
| 392 | if (cert->chain == NULL) { |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | if (!sk_CRYPTO_BUFFER_push(cert->chain, buffer)) { |
| 397 | sk_CRYPTO_BUFFER_free(cert->chain); |
| 398 | cert->chain = NULL; |
| 399 | return 0; |
| 400 | } |
| 401 | CRYPTO_BUFFER_up_ref(buffer); |
| 402 | |
| 403 | return 1; |
| 404 | } |
| 405 | |
| 406 | int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, size_t der_len, |
| 407 | const uint8_t *der) { |
| 408 | CRYPTO_BUFFER *buffer = CRYPTO_BUFFER_new(der, der_len, NULL); |
| 409 | if (buffer == NULL) { |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | const int ok = ssl_set_cert(ctx->cert, buffer); |
| 414 | CRYPTO_BUFFER_free(buffer); |
| 415 | return ok; |
| 416 | } |
| 417 | |
| 418 | int SSL_use_certificate_ASN1(SSL *ssl, const uint8_t *der, size_t der_len) { |
| 419 | CRYPTO_BUFFER *buffer = CRYPTO_BUFFER_new(der, der_len, NULL); |
| 420 | if (buffer == NULL) { |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | const int ok = ssl_set_cert(ssl->cert, buffer); |
| 425 | CRYPTO_BUFFER_free(buffer); |
| 426 | return ok; |
| 427 | } |
| 428 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 429 | int ssl_has_certificate(const SSL *ssl) { |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 430 | return ssl->cert->chain != NULL && |
| 431 | sk_CRYPTO_BUFFER_value(ssl->cert->chain, 0) != NULL && |
| 432 | ssl_has_private_key(ssl); |
Steven Valdez | 909b19f | 2016-11-21 15:35:44 -0500 | [diff] [blame] | 433 | } |
| 434 | |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 435 | STACK_OF(CRYPTO_BUFFER) *ssl_parse_cert_chain(uint8_t *out_alert, |
| 436 | EVP_PKEY **out_pubkey, |
| 437 | uint8_t *out_leaf_sha256, |
| 438 | CBS *cbs, |
| 439 | CRYPTO_BUFFER_POOL *pool) { |
| 440 | *out_pubkey = NULL; |
| 441 | |
| 442 | STACK_OF(CRYPTO_BUFFER) *ret = sk_CRYPTO_BUFFER_new_null(); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 443 | if (ret == NULL) { |
| 444 | *out_alert = SSL_AD_INTERNAL_ERROR; |
| 445 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| 446 | return NULL; |
| 447 | } |
| 448 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 449 | CBS certificate_list; |
| 450 | if (!CBS_get_u24_length_prefixed(cbs, &certificate_list)) { |
| 451 | *out_alert = SSL_AD_DECODE_ERROR; |
| 452 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| 453 | goto err; |
| 454 | } |
| 455 | |
| 456 | while (CBS_len(&certificate_list) > 0) { |
| 457 | CBS certificate; |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 458 | if (!CBS_get_u24_length_prefixed(&certificate_list, &certificate) || |
| 459 | CBS_len(&certificate) == 0) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 460 | *out_alert = SSL_AD_DECODE_ERROR; |
| 461 | OPENSSL_PUT_ERROR(SSL, SSL_R_CERT_LENGTH_MISMATCH); |
| 462 | goto err; |
| 463 | } |
| 464 | |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 465 | if (sk_CRYPTO_BUFFER_num(ret) == 0) { |
| 466 | *out_pubkey = ssl_cert_parse_pubkey(&certificate); |
| 467 | if (*out_pubkey == NULL) { |
Robert Sloan | 5d62578 | 2017-02-13 09:55:39 -0800 | [diff] [blame] | 468 | *out_alert = SSL_AD_DECODE_ERROR; |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 469 | goto err; |
| 470 | } |
| 471 | |
| 472 | /* Retain the hash of the leaf certificate if requested. */ |
| 473 | if (out_leaf_sha256 != NULL) { |
| 474 | SHA256(CBS_data(&certificate), CBS_len(&certificate), out_leaf_sha256); |
| 475 | } |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 476 | } |
| 477 | |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 478 | CRYPTO_BUFFER *buf = |
| 479 | CRYPTO_BUFFER_new_from_CBS(&certificate, pool); |
| 480 | if (buf == NULL) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 481 | *out_alert = SSL_AD_DECODE_ERROR; |
| 482 | goto err; |
| 483 | } |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 484 | |
| 485 | if (!sk_CRYPTO_BUFFER_push(ret, buf)) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 486 | *out_alert = SSL_AD_INTERNAL_ERROR; |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 487 | CRYPTO_BUFFER_free(buf); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 488 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| 489 | goto err; |
| 490 | } |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | return ret; |
| 494 | |
| 495 | err: |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 496 | EVP_PKEY_free(*out_pubkey); |
| 497 | *out_pubkey = NULL; |
| 498 | sk_CRYPTO_BUFFER_pop_free(ret, CRYPTO_BUFFER_free); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 499 | return NULL; |
| 500 | } |
| 501 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 502 | int ssl_add_cert_chain(SSL *ssl, CBB *cbb) { |
| 503 | if (!ssl_has_certificate(ssl)) { |
| 504 | return CBB_add_u24(cbb, 0); |
| 505 | } |
| 506 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 507 | CBB certs; |
| 508 | if (!CBB_add_u24_length_prefixed(cbb, &certs)) { |
| 509 | goto err; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 510 | } |
| 511 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 512 | STACK_OF(CRYPTO_BUFFER) *chain = ssl->cert->chain; |
| 513 | for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(chain); i++) { |
| 514 | CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(chain, i); |
| 515 | CBB child; |
| 516 | if (!CBB_add_u24_length_prefixed(&certs, &child) || |
| 517 | !CBB_add_bytes(&child, CRYPTO_BUFFER_data(buffer), |
| 518 | CRYPTO_BUFFER_len(buffer)) || |
| 519 | !CBB_flush(&certs)) { |
| 520 | goto err; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 521 | } |
| 522 | } |
| 523 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 524 | return CBB_flush(cbb); |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 525 | |
| 526 | err: |
| 527 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| 528 | return 0; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 529 | } |
| 530 | |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 531 | /* ssl_cert_skip_to_spki parses a DER-encoded, X.509 certificate from |in| and |
| 532 | * positions |*out_tbs_cert| to cover the TBSCertificate, starting at the |
| 533 | * subjectPublicKeyInfo. */ |
| 534 | static int ssl_cert_skip_to_spki(const CBS *in, CBS *out_tbs_cert) { |
| 535 | /* From RFC 5280, section 4.1 |
| 536 | * Certificate ::= SEQUENCE { |
| 537 | * tbsCertificate TBSCertificate, |
| 538 | * signatureAlgorithm AlgorithmIdentifier, |
| 539 | * signatureValue BIT STRING } |
| 540 | |
| 541 | * TBSCertificate ::= SEQUENCE { |
| 542 | * version [0] EXPLICIT Version DEFAULT v1, |
| 543 | * serialNumber CertificateSerialNumber, |
| 544 | * signature AlgorithmIdentifier, |
| 545 | * issuer Name, |
| 546 | * validity Validity, |
| 547 | * subject Name, |
| 548 | * subjectPublicKeyInfo SubjectPublicKeyInfo, |
| 549 | * ... } */ |
| 550 | CBS buf = *in; |
| 551 | |
| 552 | CBS toplevel; |
| 553 | if (!CBS_get_asn1(&buf, &toplevel, CBS_ASN1_SEQUENCE) || |
| 554 | CBS_len(&buf) != 0 || |
| 555 | !CBS_get_asn1(&toplevel, out_tbs_cert, CBS_ASN1_SEQUENCE) || |
| 556 | /* version */ |
| 557 | !CBS_get_optional_asn1( |
| 558 | out_tbs_cert, NULL, NULL, |
| 559 | CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 0) || |
| 560 | /* serialNumber */ |
| 561 | !CBS_get_asn1(out_tbs_cert, NULL, CBS_ASN1_INTEGER) || |
| 562 | /* signature algorithm */ |
| 563 | !CBS_get_asn1(out_tbs_cert, NULL, CBS_ASN1_SEQUENCE) || |
| 564 | /* issuer */ |
| 565 | !CBS_get_asn1(out_tbs_cert, NULL, CBS_ASN1_SEQUENCE) || |
| 566 | /* validity */ |
| 567 | !CBS_get_asn1(out_tbs_cert, NULL, CBS_ASN1_SEQUENCE) || |
| 568 | /* subject */ |
| 569 | !CBS_get_asn1(out_tbs_cert, NULL, CBS_ASN1_SEQUENCE)) { |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | return 1; |
| 574 | } |
| 575 | |
| 576 | EVP_PKEY *ssl_cert_parse_pubkey(const CBS *in) { |
David Benjamin | f31229b | 2017-01-25 14:08:15 -0500 | [diff] [blame] | 577 | CBS buf = *in, tbs_cert; |
| 578 | if (!ssl_cert_skip_to_spki(&buf, &tbs_cert)) { |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 579 | OPENSSL_PUT_ERROR(SSL, SSL_R_CANNOT_PARSE_LEAF_CERT); |
| 580 | return NULL; |
| 581 | } |
| 582 | |
David Benjamin | f31229b | 2017-01-25 14:08:15 -0500 | [diff] [blame] | 583 | return EVP_parse_public_key(&tbs_cert); |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 584 | } |
| 585 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 586 | int ssl_compare_public_and_private_key(const EVP_PKEY *pubkey, |
| 587 | const EVP_PKEY *privkey) { |
Robert Sloan | 1c9db53 | 2017-03-13 08:03:59 -0700 | [diff] [blame^] | 588 | if (EVP_PKEY_is_opaque(privkey)) { |
| 589 | /* We cannot check an opaque private key and have to trust that it |
| 590 | * matches. */ |
| 591 | return 1; |
| 592 | } |
| 593 | |
Robert Sloan | 4d1ac50 | 2017-02-06 08:36:14 -0800 | [diff] [blame] | 594 | int ret = 0; |
| 595 | |
| 596 | switch (EVP_PKEY_cmp(pubkey, privkey)) { |
| 597 | case 1: |
| 598 | ret = 1; |
| 599 | break; |
| 600 | case 0: |
| 601 | OPENSSL_PUT_ERROR(X509, X509_R_KEY_VALUES_MISMATCH); |
| 602 | break; |
| 603 | case -1: |
| 604 | OPENSSL_PUT_ERROR(X509, X509_R_KEY_TYPE_MISMATCH); |
| 605 | break; |
| 606 | case -2: |
| 607 | OPENSSL_PUT_ERROR(X509, X509_R_UNKNOWN_KEY_TYPE); |
| 608 | default: |
| 609 | assert(0); |
| 610 | break; |
| 611 | } |
| 612 | |
| 613 | return ret; |
| 614 | } |
| 615 | |
| 616 | int ssl_cert_check_private_key(const CERT *cert, const EVP_PKEY *privkey) { |
| 617 | if (privkey == NULL) { |
| 618 | OPENSSL_PUT_ERROR(SSL, SSL_R_NO_PRIVATE_KEY_ASSIGNED); |
| 619 | return 0; |
| 620 | } |
| 621 | |
| 622 | if (cert->chain == NULL || |
| 623 | sk_CRYPTO_BUFFER_value(cert->chain, 0) == NULL) { |
| 624 | OPENSSL_PUT_ERROR(SSL, SSL_R_NO_CERTIFICATE_ASSIGNED); |
| 625 | return 0; |
| 626 | } |
| 627 | |
| 628 | CBS cert_cbs; |
| 629 | CRYPTO_BUFFER_init_CBS(sk_CRYPTO_BUFFER_value(cert->chain, 0), &cert_cbs); |
| 630 | EVP_PKEY *pubkey = ssl_cert_parse_pubkey(&cert_cbs); |
| 631 | if (!pubkey) { |
| 632 | OPENSSL_PUT_ERROR(X509, X509_R_UNKNOWN_KEY_TYPE); |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | const int ok = ssl_compare_public_and_private_key(pubkey, privkey); |
| 637 | EVP_PKEY_free(pubkey); |
| 638 | return ok; |
| 639 | } |
| 640 | |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 641 | int ssl_cert_check_digital_signature_key_usage(const CBS *in) { |
| 642 | CBS buf = *in; |
| 643 | |
| 644 | CBS tbs_cert, outer_extensions; |
| 645 | int has_extensions; |
| 646 | if (!ssl_cert_skip_to_spki(&buf, &tbs_cert) || |
| 647 | /* subjectPublicKeyInfo */ |
| 648 | !CBS_get_asn1(&tbs_cert, NULL, CBS_ASN1_SEQUENCE) || |
| 649 | /* issuerUniqueID */ |
| 650 | !CBS_get_optional_asn1( |
| 651 | &tbs_cert, NULL, NULL, |
| 652 | CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 1) || |
| 653 | /* subjectUniqueID */ |
| 654 | !CBS_get_optional_asn1( |
| 655 | &tbs_cert, NULL, NULL, |
| 656 | CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 2) || |
| 657 | !CBS_get_optional_asn1( |
| 658 | &tbs_cert, &outer_extensions, &has_extensions, |
| 659 | CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 3)) { |
| 660 | goto parse_err; |
| 661 | } |
| 662 | |
| 663 | if (!has_extensions) { |
| 664 | return 1; |
| 665 | } |
| 666 | |
| 667 | CBS extensions; |
| 668 | if (!CBS_get_asn1(&outer_extensions, &extensions, CBS_ASN1_SEQUENCE)) { |
| 669 | goto parse_err; |
| 670 | } |
| 671 | |
| 672 | while (CBS_len(&extensions) > 0) { |
| 673 | CBS extension, oid, contents; |
| 674 | if (!CBS_get_asn1(&extensions, &extension, CBS_ASN1_SEQUENCE) || |
| 675 | !CBS_get_asn1(&extension, &oid, CBS_ASN1_OBJECT) || |
| 676 | (CBS_peek_asn1_tag(&extension, CBS_ASN1_BOOLEAN) && |
| 677 | !CBS_get_asn1(&extension, NULL, CBS_ASN1_BOOLEAN)) || |
| 678 | !CBS_get_asn1(&extension, &contents, CBS_ASN1_OCTETSTRING) || |
| 679 | CBS_len(&extension) != 0) { |
| 680 | goto parse_err; |
| 681 | } |
| 682 | |
| 683 | static const uint8_t kKeyUsageOID[3] = {0x55, 0x1d, 0x0f}; |
| 684 | if (CBS_len(&oid) != sizeof(kKeyUsageOID) || |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 685 | OPENSSL_memcmp(CBS_data(&oid), kKeyUsageOID, sizeof(kKeyUsageOID)) != |
| 686 | 0) { |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 687 | continue; |
| 688 | } |
| 689 | |
| 690 | CBS bit_string; |
| 691 | if (!CBS_get_asn1(&contents, &bit_string, CBS_ASN1_BITSTRING) || |
| 692 | CBS_len(&contents) != 0) { |
| 693 | goto parse_err; |
| 694 | } |
| 695 | |
| 696 | /* This is the KeyUsage extension. See |
| 697 | * https://tools.ietf.org/html/rfc5280#section-4.2.1.3 */ |
| 698 | if (!CBS_is_valid_asn1_bitstring(&bit_string)) { |
| 699 | goto parse_err; |
| 700 | } |
| 701 | |
| 702 | if (!CBS_asn1_bitstring_has_bit(&bit_string, 0)) { |
| 703 | OPENSSL_PUT_ERROR(SSL, SSL_R_ECC_CERT_NOT_FOR_SIGNING); |
| 704 | return 0; |
| 705 | } |
| 706 | |
| 707 | return 1; |
| 708 | } |
| 709 | |
| 710 | /* No KeyUsage extension found. */ |
| 711 | return 1; |
| 712 | |
| 713 | parse_err: |
| 714 | OPENSSL_PUT_ERROR(SSL, SSL_R_CANNOT_PARSE_LEAF_CERT); |
| 715 | return 0; |
| 716 | } |
| 717 | |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 718 | STACK_OF(CRYPTO_BUFFER) * |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 719 | ssl_parse_client_CA_list(SSL *ssl, uint8_t *out_alert, CBS *cbs) { |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 720 | CRYPTO_BUFFER_POOL *const pool = ssl->ctx->pool; |
| 721 | |
| 722 | STACK_OF(CRYPTO_BUFFER) *ret = sk_CRYPTO_BUFFER_new_null(); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 723 | if (ret == NULL) { |
| 724 | *out_alert = SSL_AD_INTERNAL_ERROR; |
| 725 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| 726 | return NULL; |
| 727 | } |
| 728 | |
| 729 | CBS child; |
| 730 | if (!CBS_get_u16_length_prefixed(cbs, &child)) { |
| 731 | *out_alert = SSL_AD_DECODE_ERROR; |
| 732 | OPENSSL_PUT_ERROR(SSL, SSL_R_LENGTH_MISMATCH); |
| 733 | goto err; |
| 734 | } |
| 735 | |
| 736 | while (CBS_len(&child) > 0) { |
| 737 | CBS distinguished_name; |
| 738 | if (!CBS_get_u16_length_prefixed(&child, &distinguished_name)) { |
| 739 | *out_alert = SSL_AD_DECODE_ERROR; |
| 740 | OPENSSL_PUT_ERROR(SSL, SSL_R_CA_DN_TOO_LONG); |
| 741 | goto err; |
| 742 | } |
| 743 | |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 744 | CRYPTO_BUFFER *buffer = |
| 745 | CRYPTO_BUFFER_new_from_CBS(&distinguished_name, pool); |
| 746 | if (buffer == NULL || |
| 747 | !sk_CRYPTO_BUFFER_push(ret, buffer)) { |
| 748 | CRYPTO_BUFFER_free(buffer); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 749 | *out_alert = SSL_AD_INTERNAL_ERROR; |
| 750 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| 751 | goto err; |
| 752 | } |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 753 | } |
| 754 | |
| 755 | if (!ssl->ctx->x509_method->check_client_CA_list(ret)) { |
| 756 | *out_alert = SSL_AD_INTERNAL_ERROR; |
| 757 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| 758 | goto err; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | return ret; |
| 762 | |
| 763 | err: |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 764 | sk_CRYPTO_BUFFER_pop_free(ret, CRYPTO_BUFFER_free); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 765 | return NULL; |
| 766 | } |
| 767 | |
| 768 | int ssl_add_client_CA_list(SSL *ssl, CBB *cbb) { |
| 769 | CBB child, name_cbb; |
| 770 | if (!CBB_add_u16_length_prefixed(cbb, &child)) { |
| 771 | return 0; |
| 772 | } |
| 773 | |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 774 | STACK_OF(CRYPTO_BUFFER) *names = ssl->client_CA; |
| 775 | if (names == NULL) { |
| 776 | names = ssl->ctx->client_CA; |
| 777 | } |
| 778 | if (names == NULL) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 779 | return CBB_flush(cbb); |
| 780 | } |
| 781 | |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 782 | for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(names); i++) { |
| 783 | const CRYPTO_BUFFER *name = sk_CRYPTO_BUFFER_value(names, i); |
| 784 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 785 | if (!CBB_add_u16_length_prefixed(&child, &name_cbb) || |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 786 | !CBB_add_bytes(&name_cbb, CRYPTO_BUFFER_data(name), |
| 787 | CRYPTO_BUFFER_len(name))) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 788 | return 0; |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | return CBB_flush(cbb); |
| 793 | } |
| 794 | |
David Benjamin | 1b24967 | 2016-12-06 18:25:50 -0500 | [diff] [blame] | 795 | void SSL_CTX_set_cert_cb(SSL_CTX *ctx, int (*cb)(SSL *ssl, void *arg), |
| 796 | void *arg) { |
| 797 | ssl_cert_set_cert_cb(ctx->cert, cb, arg); |
| 798 | } |
| 799 | |
| 800 | void SSL_set_cert_cb(SSL *ssl, int (*cb)(SSL *ssl, void *arg), void *arg) { |
| 801 | ssl_cert_set_cert_cb(ssl->cert, cb, arg); |
| 802 | } |
| 803 | |
Robert Sloan | 7d422bc | 2017-03-06 10:04:29 -0800 | [diff] [blame] | 804 | STACK_OF(CRYPTO_BUFFER) *SSL_get0_peer_certificates(const SSL *ssl) { |
| 805 | SSL_SESSION *session = SSL_get_session(ssl); |
| 806 | if (session == NULL) { |
| 807 | return NULL; |
| 808 | } |
| 809 | |
| 810 | return session->certs; |
| 811 | } |
| 812 | |
| 813 | STACK_OF(CRYPTO_BUFFER) *SSL_get0_server_requested_CAs(const SSL *ssl) { |
| 814 | if (ssl->s3->hs == NULL) { |
| 815 | return NULL; |
| 816 | } |
| 817 | return ssl->s3->hs->ca_names; |
| 818 | } |
| 819 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 820 | int ssl_check_leaf_certificate(SSL_HANDSHAKE *hs, EVP_PKEY *pkey, |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 821 | const CRYPTO_BUFFER *leaf) { |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 822 | SSL *const ssl = hs->ssl; |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 823 | assert(ssl3_protocol_version(ssl) < TLS1_3_VERSION); |
| 824 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 825 | /* Check the certificate's type matches the cipher. */ |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 826 | int expected_type = ssl_cipher_get_key_type(hs->new_cipher); |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 827 | assert(expected_type != EVP_PKEY_NONE); |
| 828 | if (pkey->type != expected_type) { |
| 829 | OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_CERTIFICATE_TYPE); |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 830 | return 0; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 831 | } |
| 832 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 833 | if (hs->new_cipher->algorithm_auth & SSL_aECDSA) { |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 834 | CBS leaf_cbs; |
| 835 | CBS_init(&leaf_cbs, CRYPTO_BUFFER_data(leaf), CRYPTO_BUFFER_len(leaf)); |
| 836 | /* ECDSA and ECDH certificates use the same public key format. Instead, |
| 837 | * they are distinguished by the key usage extension in the certificate. */ |
| 838 | if (!ssl_cert_check_digital_signature_key_usage(&leaf_cbs)) { |
| 839 | return 0; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 840 | } |
| 841 | |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 842 | EC_KEY *ec_key = EVP_PKEY_get0_EC_KEY(pkey); |
| 843 | if (ec_key == NULL) { |
| 844 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_ECC_CERT); |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 845 | return 0; |
David Benjamin | 95add82 | 2016-10-19 01:09:12 -0400 | [diff] [blame] | 846 | } |
| 847 | |
| 848 | /* Check the key's group and point format are acceptable. */ |
| 849 | uint16_t group_id; |
| 850 | if (!ssl_nid_to_group_id( |
| 851 | &group_id, EC_GROUP_get_curve_name(EC_KEY_get0_group(ec_key))) || |
| 852 | !tls1_check_group_id(ssl, group_id) || |
| 853 | EC_KEY_get_conv_form(ec_key) != POINT_CONVERSION_UNCOMPRESSED) { |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 854 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_ECC_CERT); |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 855 | return 0; |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 856 | } |
| 857 | } |
| 858 | |
Steven Valdez | e7531f0 | 2016-12-14 13:29:57 -0500 | [diff] [blame] | 859 | return 1; |
| 860 | } |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 861 | |
Robert Sloan | a94fe05 | 2017-02-21 08:49:28 -0800 | [diff] [blame] | 862 | static int set_signed_cert_timestamp_list(CERT *cert, const uint8_t *list, |
| 863 | size_t list_len) { |
| 864 | CBS sct_list; |
| 865 | CBS_init(&sct_list, list, list_len); |
| 866 | if (!ssl_is_sct_list_valid(&sct_list)) { |
| 867 | OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SCT_LIST); |
| 868 | return 0; |
| 869 | } |
| 870 | |
| 871 | CRYPTO_BUFFER_free(cert->signed_cert_timestamp_list); |
| 872 | cert->signed_cert_timestamp_list = |
| 873 | CRYPTO_BUFFER_new(CBS_data(&sct_list), CBS_len(&sct_list), NULL); |
| 874 | return cert->signed_cert_timestamp_list != NULL; |
| 875 | } |
| 876 | |
| 877 | int SSL_CTX_set_signed_cert_timestamp_list(SSL_CTX *ctx, const uint8_t *list, |
| 878 | size_t list_len) { |
| 879 | return set_signed_cert_timestamp_list(ctx->cert, list, list_len); |
| 880 | } |
| 881 | |
| 882 | int SSL_set_signed_cert_timestamp_list(SSL *ssl, const uint8_t *list, |
| 883 | size_t list_len) { |
| 884 | return set_signed_cert_timestamp_list(ssl->cert, list, list_len); |
| 885 | } |
| 886 | |
| 887 | int SSL_CTX_set_ocsp_response(SSL_CTX *ctx, const uint8_t *response, |
| 888 | size_t response_len) { |
| 889 | CRYPTO_BUFFER_free(ctx->cert->ocsp_response); |
| 890 | ctx->cert->ocsp_response = CRYPTO_BUFFER_new(response, response_len, NULL); |
| 891 | return ctx->cert->ocsp_response != NULL; |
| 892 | } |
| 893 | |
| 894 | int SSL_set_ocsp_response(SSL *ssl, const uint8_t *response, |
| 895 | size_t response_len) { |
| 896 | CRYPTO_BUFFER_free(ssl->cert->ocsp_response); |
| 897 | ssl->cert->ocsp_response = CRYPTO_BUFFER_new(response, response_len, NULL); |
| 898 | return ssl->cert->ocsp_response != NULL; |
| 899 | } |