Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1 | /* |
| 2 | * |
Craig Tiller | 6169d5f | 2016-03-31 07:46:18 -0700 | [diff] [blame] | 3 | * Copyright 2015, Google Inc. |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
Craig Tiller | b29f1fe | 2017-03-28 15:49:23 -0700 | [diff] [blame] | 34 | #include "src/core/tsi/ssl_transport_security.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 35 | |
Paul Querna | 47d841d | 2016-03-10 11:19:17 -0800 | [diff] [blame] | 36 | #include <grpc/support/port_platform.h> |
| 37 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 38 | #include <limits.h> |
Julien Boeuf | 330f4c8 | 2015-04-27 10:37:42 -0700 | [diff] [blame] | 39 | #include <string.h> |
Paul Querna | 27df689 | 2016-03-13 13:34:27 -0700 | [diff] [blame] | 40 | |
Nicolas "Pixel" Noble | e3df5a0 | 2016-10-27 00:41:13 +0200 | [diff] [blame] | 41 | /* TODO(jboeuf): refactor inet_ntop into a portability header. */ |
| 42 | /* Note: for whomever reads this and tries to refactor this, this |
| 43 | can't be in grpc, it has to be in gpr. */ |
| 44 | #ifdef GPR_WINDOWS |
| 45 | #include <ws2tcpip.h> |
| 46 | #else |
| 47 | #include <arpa/inet.h> |
Mehrdad Afshari | f583975 | 2017-04-18 10:26:40 -0700 | [diff] [blame] | 48 | #include <sys/socket.h> |
Nicolas "Pixel" Noble | e3df5a0 | 2016-10-27 00:41:13 +0200 | [diff] [blame] | 49 | #endif |
| 50 | |
Nicolas "Pixel" Noble | b29d8cf | 2016-04-08 01:38:29 +0200 | [diff] [blame] | 51 | #include <grpc/support/alloc.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 52 | #include <grpc/support/log.h> |
nnoble | 8a23a3d | 2014-12-16 10:10:29 -0800 | [diff] [blame] | 53 | #include <grpc/support/sync.h> |
Julien Boeuf | 4a0a394 | 2015-02-03 15:04:45 -0800 | [diff] [blame] | 54 | #include <grpc/support/thd.h> |
Nicolas "Pixel" Noble | 213ed91 | 2015-01-30 02:11:35 +0100 | [diff] [blame] | 55 | #include <grpc/support/useful.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 56 | |
| 57 | #include <openssl/bio.h> |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 58 | #include <openssl/crypto.h> /* For OPENSSL_free */ |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 59 | #include <openssl/err.h> |
| 60 | #include <openssl/ssl.h> |
| 61 | #include <openssl/x509.h> |
| 62 | #include <openssl/x509v3.h> |
| 63 | |
Craig Tiller | b29f1fe | 2017-03-28 15:49:23 -0700 | [diff] [blame] | 64 | #include "src/core/tsi/ssl_types.h" |
| 65 | #include "src/core/tsi/transport_security.h" |
Craig Tiller | 0fe5ee7 | 2015-12-22 12:50:36 -0800 | [diff] [blame] | 66 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 67 | /* --- Constants. ---*/ |
| 68 | |
| 69 | #define TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND 16384 |
| 70 | #define TSI_SSL_MAX_PROTECTED_FRAME_SIZE_LOWER_BOUND 1024 |
| 71 | |
Julien Boeuf | 3e29de1 | 2015-06-18 23:29:13 +0200 | [diff] [blame] | 72 | /* Putting a macro like this and littering the source file with #if is really |
| 73 | bad practice. |
| 74 | TODO(jboeuf): refactor all the #if / #endif in a separate module. */ |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 75 | #ifndef TSI_OPENSSL_ALPN_SUPPORT |
| 76 | #define TSI_OPENSSL_ALPN_SUPPORT 1 |
| 77 | #endif |
| 78 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 79 | /* TODO(jboeuf): I have not found a way to get this number dynamically from the |
Julien Boeuf | 3e29de1 | 2015-06-18 23:29:13 +0200 | [diff] [blame] | 80 | SSL structure. This is what we would ultimately want though... */ |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 81 | #define TSI_SSL_MAX_PROTECTION_OVERHEAD 100 |
| 82 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 83 | /* --- Structure definitions. ---*/ |
| 84 | |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 85 | struct tsi_ssl_client_handshaker_factory { |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 86 | SSL_CTX *ssl_context; |
| 87 | unsigned char *alpn_protocol_list; |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 88 | size_t alpn_protocol_list_length; |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 89 | }; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 90 | |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 91 | struct tsi_ssl_server_handshaker_factory { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 92 | /* Several contexts to support SNI. |
| 93 | The tsi_peer array contains the subject names of the server certificates |
| 94 | associated with the contexts at the same index. */ |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 95 | SSL_CTX **ssl_contexts; |
| 96 | tsi_peer *ssl_context_x509_subject_names; |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 97 | size_t ssl_context_count; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 98 | unsigned char *alpn_protocol_list; |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 99 | size_t alpn_protocol_list_length; |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 100 | }; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 101 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 102 | typedef struct { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 103 | tsi_handshaker base; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 104 | SSL *ssl; |
| 105 | BIO *into_ssl; |
| 106 | BIO *from_ssl; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 107 | tsi_result result; |
| 108 | } tsi_ssl_handshaker; |
| 109 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 110 | typedef struct { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 111 | tsi_frame_protector base; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 112 | SSL *ssl; |
| 113 | BIO *into_ssl; |
| 114 | BIO *from_ssl; |
| 115 | unsigned char *buffer; |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 116 | size_t buffer_size; |
| 117 | size_t buffer_offset; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 118 | } tsi_ssl_frame_protector; |
| 119 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 120 | /* --- Library Initialization. ---*/ |
| 121 | |
nnoble | 8a23a3d | 2014-12-16 10:10:29 -0800 | [diff] [blame] | 122 | static gpr_once init_openssl_once = GPR_ONCE_INIT; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 123 | static gpr_mu *openssl_mutexes = NULL; |
Julien Boeuf | 4a0a394 | 2015-02-03 15:04:45 -0800 | [diff] [blame] | 124 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 125 | static void openssl_locking_cb(int mode, int type, const char *file, int line) { |
| 126 | if (mode & CRYPTO_LOCK) { |
| 127 | gpr_mu_lock(&openssl_mutexes[type]); |
| 128 | } else { |
| 129 | gpr_mu_unlock(&openssl_mutexes[type]); |
| 130 | } |
Julien Boeuf | 4a0a394 | 2015-02-03 15:04:45 -0800 | [diff] [blame] | 131 | } |
| 132 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 133 | static unsigned long openssl_thread_id_cb(void) { |
| 134 | return (unsigned long)gpr_thd_currentid(); |
Julien Boeuf | 4a0a394 | 2015-02-03 15:04:45 -0800 | [diff] [blame] | 135 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 136 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 137 | static void init_openssl(void) { |
Julien Boeuf | 4a0a394 | 2015-02-03 15:04:45 -0800 | [diff] [blame] | 138 | int i; |
Craig Tiller | 3121fd4 | 2015-09-10 09:56:20 -0700 | [diff] [blame] | 139 | int num_locks; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 140 | SSL_library_init(); |
| 141 | SSL_load_error_strings(); |
| 142 | OpenSSL_add_all_algorithms(); |
| 143 | num_locks = CRYPTO_num_locks(); |
| 144 | GPR_ASSERT(num_locks > 0); |
Nicolas "Pixel" Noble | 7c9a154 | 2016-03-26 01:33:34 +0100 | [diff] [blame] | 145 | openssl_mutexes = gpr_malloc((size_t)num_locks * sizeof(gpr_mu)); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 146 | for (i = 0; i < CRYPTO_num_locks(); i++) { |
| 147 | gpr_mu_init(&openssl_mutexes[i]); |
| 148 | } |
| 149 | CRYPTO_set_locking_callback(openssl_locking_cb); |
| 150 | CRYPTO_set_id_callback(openssl_thread_id_cb); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | /* --- Ssl utils. ---*/ |
| 154 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 155 | static const char *ssl_error_string(int error) { |
| 156 | switch (error) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 157 | case SSL_ERROR_NONE: |
| 158 | return "SSL_ERROR_NONE"; |
| 159 | case SSL_ERROR_ZERO_RETURN: |
| 160 | return "SSL_ERROR_ZERO_RETURN"; |
| 161 | case SSL_ERROR_WANT_READ: |
| 162 | return "SSL_ERROR_WANT_READ"; |
| 163 | case SSL_ERROR_WANT_WRITE: |
| 164 | return "SSL_ERROR_WANT_WRITE"; |
| 165 | case SSL_ERROR_WANT_CONNECT: |
| 166 | return "SSL_ERROR_WANT_CONNECT"; |
| 167 | case SSL_ERROR_WANT_ACCEPT: |
| 168 | return "SSL_ERROR_WANT_ACCEPT"; |
| 169 | case SSL_ERROR_WANT_X509_LOOKUP: |
| 170 | return "SSL_ERROR_WANT_X509_LOOKUP"; |
| 171 | case SSL_ERROR_SYSCALL: |
| 172 | return "SSL_ERROR_SYSCALL"; |
| 173 | case SSL_ERROR_SSL: |
| 174 | return "SSL_ERROR_SSL"; |
| 175 | default: |
| 176 | return "Unknown error"; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 177 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | /* TODO(jboeuf): Remove when we are past the debugging phase with this code. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 181 | static void ssl_log_where_info(const SSL *ssl, int where, int flag, |
| 182 | const char *msg) { |
Craig Tiller | 84f75d4 | 2017-05-03 13:06:35 -0700 | [diff] [blame] | 183 | if ((where & flag) && GRPC_TRACER_ON(tsi_tracing_enabled)) { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 184 | gpr_log(GPR_INFO, "%20.20s - %30.30s - %5.10s", msg, |
| 185 | SSL_state_string_long(ssl), SSL_state_string(ssl)); |
| 186 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | /* Used for debugging. TODO(jboeuf): Remove when code is mature enough. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 190 | static void ssl_info_callback(const SSL *ssl, int where, int ret) { |
| 191 | if (ret == 0) { |
| 192 | gpr_log(GPR_ERROR, "ssl_info_callback: error occured.\n"); |
| 193 | return; |
| 194 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 195 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 196 | ssl_log_where_info(ssl, where, SSL_CB_LOOP, "LOOP"); |
| 197 | ssl_log_where_info(ssl, where, SSL_CB_HANDSHAKE_START, "HANDSHAKE START"); |
| 198 | ssl_log_where_info(ssl, where, SSL_CB_HANDSHAKE_DONE, "HANDSHAKE DONE"); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 199 | } |
| 200 | |
Julien Boeuf | 0170a6c | 2015-02-24 18:08:01 -0800 | [diff] [blame] | 201 | /* Returns 1 if name looks like an IP address, 0 otherwise. |
Paul Querna | 4a9e7c4 | 2016-03-13 14:00:11 -0700 | [diff] [blame] | 202 | This is a very rough heuristic, and only handles IPv6 in hexadecimal form. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 203 | static int looks_like_ip_address(const char *name) { |
Julien Boeuf | 9fff77e | 2015-02-24 16:50:35 -0800 | [diff] [blame] | 204 | size_t i; |
| 205 | size_t dot_count = 0; |
| 206 | size_t num_size = 0; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 207 | for (i = 0; i < strlen(name); i++) { |
Paul Querna | 4a9e7c4 | 2016-03-13 14:00:11 -0700 | [diff] [blame] | 208 | if (name[i] == ':') { |
| 209 | /* IPv6 Address in hexadecimal form, : is not allowed in DNS names. */ |
| 210 | return 1; |
| 211 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 212 | if (name[i] >= '0' && name[i] <= '9') { |
| 213 | if (num_size > 3) return 0; |
| 214 | num_size++; |
| 215 | } else if (name[i] == '.') { |
| 216 | if (dot_count > 3 || num_size == 0) return 0; |
| 217 | dot_count++; |
| 218 | num_size = 0; |
| 219 | } else { |
| 220 | return 0; |
Julien Boeuf | 9fff77e | 2015-02-24 16:50:35 -0800 | [diff] [blame] | 221 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 222 | } |
| 223 | if (dot_count < 3 || num_size == 0) return 0; |
Julien Boeuf | 9fff77e | 2015-02-24 16:50:35 -0800 | [diff] [blame] | 224 | return 1; |
| 225 | } |
| 226 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 227 | /* Gets the subject CN from an X509 cert. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 228 | static tsi_result ssl_get_x509_common_name(X509 *cert, unsigned char **utf8, |
| 229 | size_t *utf8_size) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 230 | int common_name_index = -1; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 231 | X509_NAME_ENTRY *common_name_entry = NULL; |
| 232 | ASN1_STRING *common_name_asn1 = NULL; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 233 | X509_NAME *subject_name = X509_get_subject_name(cert); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 234 | int utf8_returned_size = 0; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 235 | if (subject_name == NULL) { |
| 236 | gpr_log(GPR_ERROR, "Could not get subject name from certificate."); |
| 237 | return TSI_NOT_FOUND; |
| 238 | } |
| 239 | common_name_index = |
| 240 | X509_NAME_get_index_by_NID(subject_name, NID_commonName, -1); |
| 241 | if (common_name_index == -1) { |
| 242 | gpr_log(GPR_ERROR, |
| 243 | "Could not get common name of subject from certificate."); |
| 244 | return TSI_NOT_FOUND; |
| 245 | } |
| 246 | common_name_entry = X509_NAME_get_entry(subject_name, common_name_index); |
| 247 | if (common_name_entry == NULL) { |
| 248 | gpr_log(GPR_ERROR, "Could not get common name entry from certificate."); |
| 249 | return TSI_INTERNAL_ERROR; |
| 250 | } |
| 251 | common_name_asn1 = X509_NAME_ENTRY_get_data(common_name_entry); |
| 252 | if (common_name_asn1 == NULL) { |
| 253 | gpr_log(GPR_ERROR, |
| 254 | "Could not get common name entry asn1 from certificate."); |
| 255 | return TSI_INTERNAL_ERROR; |
| 256 | } |
| 257 | utf8_returned_size = ASN1_STRING_to_UTF8(utf8, common_name_asn1); |
| 258 | if (utf8_returned_size < 0) { |
| 259 | gpr_log(GPR_ERROR, "Could not extract utf8 from asn1 string."); |
| 260 | return TSI_OUT_OF_RESOURCES; |
| 261 | } |
| 262 | *utf8_size = (size_t)utf8_returned_size; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 263 | return TSI_OK; |
| 264 | } |
| 265 | |
| 266 | /* Gets the subject CN of an X509 cert as a tsi_peer_property. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 267 | static tsi_result peer_property_from_x509_common_name( |
| 268 | X509 *cert, tsi_peer_property *property) { |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 269 | unsigned char *common_name; |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 270 | size_t common_name_size; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 271 | tsi_result result = |
| 272 | ssl_get_x509_common_name(cert, &common_name, &common_name_size); |
| 273 | if (result != TSI_OK) { |
| 274 | if (result == TSI_NOT_FOUND) { |
| 275 | common_name = NULL; |
| 276 | common_name_size = 0; |
| 277 | } else { |
| 278 | return result; |
Julien Boeuf | 9fff77e | 2015-02-24 16:50:35 -0800 | [diff] [blame] | 279 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 280 | } |
| 281 | result = tsi_construct_string_peer_property( |
| 282 | TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY, |
| 283 | common_name == NULL ? "" : (const char *)common_name, common_name_size, |
| 284 | property); |
| 285 | OPENSSL_free(common_name); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 286 | return result; |
| 287 | } |
| 288 | |
Deepak Lukose | e61cbe3 | 2016-03-14 14:10:44 -0700 | [diff] [blame] | 289 | /* Gets the X509 cert in PEM format as a tsi_peer_property. */ |
| 290 | static tsi_result add_pem_certificate(X509 *cert, tsi_peer_property *property) { |
| 291 | BIO *bio = BIO_new(BIO_s_mem()); |
| 292 | if (!PEM_write_bio_X509(bio, cert)) { |
| 293 | BIO_free(bio); |
| 294 | return TSI_INTERNAL_ERROR; |
| 295 | } |
| 296 | char *contents; |
| 297 | long len = BIO_get_mem_data(bio, &contents); |
| 298 | if (len <= 0) { |
| 299 | BIO_free(bio); |
| 300 | return TSI_INTERNAL_ERROR; |
| 301 | } |
| 302 | tsi_result result = tsi_construct_string_peer_property( |
| 303 | TSI_X509_PEM_CERT_PROPERTY, (const char *)contents, (size_t)len, |
| 304 | property); |
| 305 | BIO_free(bio); |
| 306 | return result; |
| 307 | } |
| 308 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 309 | /* Gets the subject SANs from an X509 cert as a tsi_peer_property. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 310 | static tsi_result add_subject_alt_names_properties_to_peer( |
| 311 | tsi_peer *peer, GENERAL_NAMES *subject_alt_names, |
| 312 | size_t subject_alt_name_count) { |
Craig Tiller | 3121fd4 | 2015-09-10 09:56:20 -0700 | [diff] [blame] | 313 | size_t i; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 314 | tsi_result result = TSI_OK; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 315 | |
| 316 | /* Reset for DNS entries filtering. */ |
Julien Boeuf | 77e8c1c | 2015-05-13 13:50:59 -0700 | [diff] [blame] | 317 | peer->property_count -= subject_alt_name_count; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 318 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 319 | for (i = 0; i < subject_alt_name_count; i++) { |
| 320 | GENERAL_NAME *subject_alt_name = |
Craig Tiller | 0fe5ee7 | 2015-12-22 12:50:36 -0800 | [diff] [blame] | 321 | sk_GENERAL_NAME_value(subject_alt_names, TSI_SIZE_AS_SIZE(i)); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 322 | /* Filter out the non-dns entries names. */ |
| 323 | if (subject_alt_name->type == GEN_DNS) { |
Paul Querna | 47d841d | 2016-03-10 11:19:17 -0800 | [diff] [blame] | 324 | unsigned char *name = NULL; |
| 325 | int name_size; |
| 326 | name_size = ASN1_STRING_to_UTF8(&name, subject_alt_name->d.dNSName); |
| 327 | if (name_size < 0) { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 328 | gpr_log(GPR_ERROR, "Could not get utf8 from asn1 string."); |
| 329 | result = TSI_INTERNAL_ERROR; |
| 330 | break; |
| 331 | } |
| 332 | result = tsi_construct_string_peer_property( |
Paul Querna | 47d841d | 2016-03-10 11:19:17 -0800 | [diff] [blame] | 333 | TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY, (const char *)name, |
| 334 | (size_t)name_size, &peer->properties[peer->property_count++]); |
| 335 | OPENSSL_free(name); |
| 336 | } else if (subject_alt_name->type == GEN_IPADD) { |
| 337 | char ntop_buf[INET6_ADDRSTRLEN]; |
| 338 | int af; |
| 339 | |
| 340 | if (subject_alt_name->d.iPAddress->length == 4) { |
| 341 | af = AF_INET; |
| 342 | } else if (subject_alt_name->d.iPAddress->length == 16) { |
| 343 | af = AF_INET6; |
| 344 | } else { |
| 345 | gpr_log(GPR_ERROR, "SAN IP Address contained invalid IP"); |
| 346 | result = TSI_INTERNAL_ERROR; |
| 347 | break; |
| 348 | } |
Nicolas "Pixel" Noble | e3df5a0 | 2016-10-27 00:41:13 +0200 | [diff] [blame] | 349 | const char *name = inet_ntop(af, subject_alt_name->d.iPAddress->data, |
| 350 | ntop_buf, INET6_ADDRSTRLEN); |
Paul Querna | 47d841d | 2016-03-10 11:19:17 -0800 | [diff] [blame] | 351 | if (name == NULL) { |
| 352 | gpr_log(GPR_ERROR, "Could not get IP string from asn1 octet."); |
| 353 | result = TSI_INTERNAL_ERROR; |
| 354 | break; |
| 355 | } |
| 356 | |
| 357 | result = tsi_construct_string_peer_property_from_cstring( |
| 358 | TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY, name, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 359 | &peer->properties[peer->property_count++]); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 360 | } |
Paul Querna | 47d841d | 2016-03-10 11:19:17 -0800 | [diff] [blame] | 361 | if (result != TSI_OK) break; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 362 | } |
Julien Boeuf | 77e8c1c | 2015-05-13 13:50:59 -0700 | [diff] [blame] | 363 | return result; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | /* Gets information about the peer's X509 cert as a tsi_peer object. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 367 | static tsi_result peer_from_x509(X509 *cert, int include_certificate_type, |
| 368 | tsi_peer *peer) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 369 | /* TODO(jboeuf): Maybe add more properties. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 370 | GENERAL_NAMES *subject_alt_names = |
| 371 | X509_get_ext_d2i(cert, NID_subject_alt_name, 0, 0); |
Julien Boeuf | 01ac4f0 | 2015-10-09 16:08:24 -0700 | [diff] [blame] | 372 | int subject_alt_name_count = (subject_alt_names != NULL) |
| 373 | ? (int)sk_GENERAL_NAME_num(subject_alt_names) |
| 374 | : 0; |
Craig Tiller | 3121fd4 | 2015-09-10 09:56:20 -0700 | [diff] [blame] | 375 | size_t property_count; |
| 376 | tsi_result result; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 377 | GPR_ASSERT(subject_alt_name_count >= 0); |
| 378 | property_count = (include_certificate_type ? (size_t)1 : 0) + |
Deepak Lukose | e61cbe3 | 2016-03-14 14:10:44 -0700 | [diff] [blame] | 379 | 2 /* common name, certificate */ + |
| 380 | (size_t)subject_alt_name_count; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 381 | result = tsi_construct_peer(property_count, peer); |
| 382 | if (result != TSI_OK) return result; |
| 383 | do { |
| 384 | if (include_certificate_type) { |
| 385 | result = tsi_construct_string_peer_property_from_cstring( |
| 386 | TSI_CERTIFICATE_TYPE_PEER_PROPERTY, TSI_X509_CERTIFICATE_TYPE, |
| 387 | &peer->properties[0]); |
| 388 | if (result != TSI_OK) break; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 389 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 390 | result = peer_property_from_x509_common_name( |
| 391 | cert, &peer->properties[include_certificate_type ? 1 : 0]); |
| 392 | if (result != TSI_OK) break; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 393 | |
Deepak Lukose | e61cbe3 | 2016-03-14 14:10:44 -0700 | [diff] [blame] | 394 | result = add_pem_certificate( |
| 395 | cert, &peer->properties[include_certificate_type ? 2 : 1]); |
| 396 | if (result != TSI_OK) break; |
| 397 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 398 | if (subject_alt_name_count != 0) { |
| 399 | result = add_subject_alt_names_properties_to_peer( |
| 400 | peer, subject_alt_names, (size_t)subject_alt_name_count); |
| 401 | if (result != TSI_OK) break; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 402 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 403 | } while (0); |
| 404 | |
| 405 | if (subject_alt_names != NULL) { |
| 406 | sk_GENERAL_NAME_pop_free(subject_alt_names, GENERAL_NAME_free); |
| 407 | } |
| 408 | if (result != TSI_OK) tsi_peer_destruct(peer); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 409 | return result; |
| 410 | } |
| 411 | |
nnoble | 0c475f0 | 2014-12-05 15:37:39 -0800 | [diff] [blame] | 412 | /* Logs the SSL error stack. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 413 | static void log_ssl_error_stack(void) { |
nnoble | 0c475f0 | 2014-12-05 15:37:39 -0800 | [diff] [blame] | 414 | unsigned long err; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 415 | while ((err = ERR_get_error()) != 0) { |
| 416 | char details[256]; |
Julien Boeuf | 01ac4f0 | 2015-10-09 16:08:24 -0700 | [diff] [blame] | 417 | ERR_error_string_n((uint32_t)err, details, sizeof(details)); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 418 | gpr_log(GPR_ERROR, "%s", details); |
| 419 | } |
nnoble | 0c475f0 | 2014-12-05 15:37:39 -0800 | [diff] [blame] | 420 | } |
| 421 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 422 | /* Performs an SSL_read and handle errors. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 423 | static tsi_result do_ssl_read(SSL *ssl, unsigned char *unprotected_bytes, |
| 424 | size_t *unprotected_bytes_size) { |
Craig Tiller | f96dfc3 | 2015-09-10 14:43:18 -0700 | [diff] [blame] | 425 | int read_from_ssl; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 426 | GPR_ASSERT(*unprotected_bytes_size <= INT_MAX); |
| 427 | read_from_ssl = |
| 428 | SSL_read(ssl, unprotected_bytes, (int)*unprotected_bytes_size); |
| 429 | if (read_from_ssl == 0) { |
| 430 | gpr_log(GPR_ERROR, "SSL_read returned 0 unexpectedly."); |
| 431 | return TSI_INTERNAL_ERROR; |
| 432 | } |
| 433 | if (read_from_ssl < 0) { |
| 434 | read_from_ssl = SSL_get_error(ssl, read_from_ssl); |
| 435 | switch (read_from_ssl) { |
| 436 | case SSL_ERROR_WANT_READ: |
| 437 | /* We need more data to finish the frame. */ |
| 438 | *unprotected_bytes_size = 0; |
| 439 | return TSI_OK; |
| 440 | case SSL_ERROR_WANT_WRITE: |
| 441 | gpr_log( |
| 442 | GPR_ERROR, |
| 443 | "Peer tried to renegotiate SSL connection. This is unsupported."); |
| 444 | return TSI_UNIMPLEMENTED; |
| 445 | case SSL_ERROR_SSL: |
| 446 | gpr_log(GPR_ERROR, "Corruption detected."); |
| 447 | log_ssl_error_stack(); |
| 448 | return TSI_DATA_CORRUPTED; |
| 449 | default: |
| 450 | gpr_log(GPR_ERROR, "SSL_read failed with error %s.", |
| 451 | ssl_error_string(read_from_ssl)); |
| 452 | return TSI_PROTOCOL_FAILURE; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 453 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 454 | } |
| 455 | *unprotected_bytes_size = (size_t)read_from_ssl; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 456 | return TSI_OK; |
| 457 | } |
| 458 | |
| 459 | /* Performs an SSL_write and handle errors. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 460 | static tsi_result do_ssl_write(SSL *ssl, unsigned char *unprotected_bytes, |
| 461 | size_t unprotected_bytes_size) { |
Craig Tiller | f96dfc3 | 2015-09-10 14:43:18 -0700 | [diff] [blame] | 462 | int ssl_write_result; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 463 | GPR_ASSERT(unprotected_bytes_size <= INT_MAX); |
| 464 | ssl_write_result = |
| 465 | SSL_write(ssl, unprotected_bytes, (int)unprotected_bytes_size); |
| 466 | if (ssl_write_result < 0) { |
| 467 | ssl_write_result = SSL_get_error(ssl, ssl_write_result); |
| 468 | if (ssl_write_result == SSL_ERROR_WANT_READ) { |
| 469 | gpr_log(GPR_ERROR, |
| 470 | "Peer tried to renegotiate SSL connection. This is unsupported."); |
| 471 | return TSI_UNIMPLEMENTED; |
| 472 | } else { |
| 473 | gpr_log(GPR_ERROR, "SSL_write failed with error %s.", |
| 474 | ssl_error_string(ssl_write_result)); |
| 475 | return TSI_INTERNAL_ERROR; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 476 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 477 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 478 | return TSI_OK; |
| 479 | } |
| 480 | |
| 481 | /* Loads an in-memory PEM certificate chain into the SSL context. */ |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 482 | static tsi_result ssl_ctx_use_certificate_chain(SSL_CTX *context, |
| 483 | const char *pem_cert_chain, |
| 484 | size_t pem_cert_chain_size) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 485 | tsi_result result = TSI_OK; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 486 | X509 *certificate = NULL; |
| 487 | BIO *pem; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 488 | GPR_ASSERT(pem_cert_chain_size <= INT_MAX); |
| 489 | pem = BIO_new_mem_buf((void *)pem_cert_chain, (int)pem_cert_chain_size); |
| 490 | if (pem == NULL) return TSI_OUT_OF_RESOURCES; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 491 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 492 | do { |
| 493 | certificate = PEM_read_bio_X509_AUX(pem, NULL, NULL, ""); |
| 494 | if (certificate == NULL) { |
| 495 | result = TSI_INVALID_ARGUMENT; |
| 496 | break; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 497 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 498 | if (!SSL_CTX_use_certificate(context, certificate)) { |
| 499 | result = TSI_INVALID_ARGUMENT; |
| 500 | break; |
| 501 | } |
| 502 | while (1) { |
| 503 | X509 *certificate_authority = PEM_read_bio_X509(pem, NULL, NULL, ""); |
| 504 | if (certificate_authority == NULL) { |
| 505 | ERR_clear_error(); |
| 506 | break; /* Done reading. */ |
| 507 | } |
| 508 | if (!SSL_CTX_add_extra_chain_cert(context, certificate_authority)) { |
| 509 | X509_free(certificate_authority); |
| 510 | result = TSI_INVALID_ARGUMENT; |
| 511 | break; |
| 512 | } |
| 513 | /* We don't need to free certificate_authority as its ownership has been |
| 514 | transfered to the context. That is not the case for certificate though. |
| 515 | */ |
| 516 | } |
| 517 | } while (0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 518 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 519 | if (certificate != NULL) X509_free(certificate); |
| 520 | BIO_free(pem); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 521 | return result; |
| 522 | } |
| 523 | |
| 524 | /* Loads an in-memory PEM private key into the SSL context. */ |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 525 | static tsi_result ssl_ctx_use_private_key(SSL_CTX *context, const char *pem_key, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 526 | size_t pem_key_size) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 527 | tsi_result result = TSI_OK; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 528 | EVP_PKEY *private_key = NULL; |
| 529 | BIO *pem; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 530 | GPR_ASSERT(pem_key_size <= INT_MAX); |
| 531 | pem = BIO_new_mem_buf((void *)pem_key, (int)pem_key_size); |
| 532 | if (pem == NULL) return TSI_OUT_OF_RESOURCES; |
| 533 | do { |
| 534 | private_key = PEM_read_bio_PrivateKey(pem, NULL, NULL, ""); |
| 535 | if (private_key == NULL) { |
| 536 | result = TSI_INVALID_ARGUMENT; |
| 537 | break; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 538 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 539 | if (!SSL_CTX_use_PrivateKey(context, private_key)) { |
| 540 | result = TSI_INVALID_ARGUMENT; |
| 541 | break; |
| 542 | } |
| 543 | } while (0); |
| 544 | if (private_key != NULL) EVP_PKEY_free(private_key); |
| 545 | BIO_free(pem); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 546 | return result; |
| 547 | } |
| 548 | |
| 549 | /* Loads in-memory PEM verification certs into the SSL context and optionally |
| 550 | returns the verification cert names (root_names can be NULL). */ |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 551 | static tsi_result ssl_ctx_load_verification_certs(SSL_CTX *context, |
| 552 | const char *pem_roots, |
| 553 | size_t pem_roots_size, |
| 554 | STACK_OF(X509_NAME) * |
| 555 | *root_names) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 556 | tsi_result result = TSI_OK; |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 557 | size_t num_roots = 0; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 558 | X509 *root = NULL; |
| 559 | X509_NAME *root_name = NULL; |
| 560 | BIO *pem; |
| 561 | X509_STORE *root_store; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 562 | GPR_ASSERT(pem_roots_size <= INT_MAX); |
| 563 | pem = BIO_new_mem_buf((void *)pem_roots, (int)pem_roots_size); |
| 564 | root_store = SSL_CTX_get_cert_store(context); |
| 565 | if (root_store == NULL) return TSI_INVALID_ARGUMENT; |
| 566 | if (pem == NULL) return TSI_OUT_OF_RESOURCES; |
| 567 | if (root_names != NULL) { |
| 568 | *root_names = sk_X509_NAME_new_null(); |
| 569 | if (*root_names == NULL) return TSI_OUT_OF_RESOURCES; |
| 570 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 571 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 572 | while (1) { |
| 573 | root = PEM_read_bio_X509_AUX(pem, NULL, NULL, ""); |
| 574 | if (root == NULL) { |
| 575 | ERR_clear_error(); |
| 576 | break; /* We're at the end of stream. */ |
nnoble | 0c475f0 | 2014-12-05 15:37:39 -0800 | [diff] [blame] | 577 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 578 | if (root_names != NULL) { |
| 579 | root_name = X509_get_subject_name(root); |
| 580 | if (root_name == NULL) { |
| 581 | gpr_log(GPR_ERROR, "Could not get name from root certificate."); |
| 582 | result = TSI_INVALID_ARGUMENT; |
| 583 | break; |
| 584 | } |
| 585 | root_name = X509_NAME_dup(root_name); |
| 586 | if (root_name == NULL) { |
| 587 | result = TSI_OUT_OF_RESOURCES; |
| 588 | break; |
| 589 | } |
| 590 | sk_X509_NAME_push(*root_names, root_name); |
| 591 | root_name = NULL; |
| 592 | } |
| 593 | if (!X509_STORE_add_cert(root_store, root)) { |
| 594 | gpr_log(GPR_ERROR, "Could not add root certificate to ssl context."); |
| 595 | result = TSI_INTERNAL_ERROR; |
| 596 | break; |
| 597 | } |
| 598 | X509_free(root); |
| 599 | num_roots++; |
| 600 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 601 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 602 | if (num_roots == 0) { |
| 603 | gpr_log(GPR_ERROR, "Could not load any root certificate."); |
| 604 | result = TSI_INVALID_ARGUMENT; |
| 605 | } |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 606 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 607 | if (result != TSI_OK) { |
| 608 | if (root != NULL) X509_free(root); |
| 609 | if (root_names != NULL) { |
| 610 | sk_X509_NAME_pop_free(*root_names, X509_NAME_free); |
| 611 | *root_names = NULL; |
| 612 | if (root_name != NULL) X509_NAME_free(root_name); |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 613 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 614 | } |
| 615 | BIO_free(pem); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 616 | return result; |
| 617 | } |
| 618 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 619 | /* Populates the SSL context with a private key and a cert chain, and sets the |
| 620 | cipher list and the ephemeral ECDH key. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 621 | static tsi_result populate_ssl_context( |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 622 | SSL_CTX *context, const tsi_ssl_pem_key_cert_pair *key_cert_pair, |
| 623 | const char *cipher_list) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 624 | tsi_result result = TSI_OK; |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 625 | if (key_cert_pair != NULL) { |
| 626 | if (key_cert_pair->cert_chain != NULL) { |
| 627 | result = ssl_ctx_use_certificate_chain(context, key_cert_pair->cert_chain, |
| 628 | strlen(key_cert_pair->cert_chain)); |
| 629 | if (result != TSI_OK) { |
| 630 | gpr_log(GPR_ERROR, "Invalid cert chain file."); |
| 631 | return result; |
| 632 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 633 | } |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 634 | if (key_cert_pair->private_key != NULL) { |
| 635 | result = ssl_ctx_use_private_key(context, key_cert_pair->private_key, |
| 636 | strlen(key_cert_pair->private_key)); |
| 637 | if (result != TSI_OK || !SSL_CTX_check_private_key(context)) { |
| 638 | gpr_log(GPR_ERROR, "Invalid private key."); |
| 639 | return result != TSI_OK ? result : TSI_INVALID_ARGUMENT; |
| 640 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 641 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 642 | } |
| 643 | if ((cipher_list != NULL) && !SSL_CTX_set_cipher_list(context, cipher_list)) { |
| 644 | gpr_log(GPR_ERROR, "Invalid cipher list: %s.", cipher_list); |
| 645 | return TSI_INVALID_ARGUMENT; |
| 646 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 647 | { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 648 | EC_KEY *ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1); |
| 649 | if (!SSL_CTX_set_tmp_ecdh(context, ecdh)) { |
| 650 | gpr_log(GPR_ERROR, "Could not set ephemeral ECDH key."); |
| 651 | EC_KEY_free(ecdh); |
| 652 | return TSI_INTERNAL_ERROR; |
| 653 | } |
| 654 | SSL_CTX_set_options(context, SSL_OP_SINGLE_ECDH_USE); |
| 655 | EC_KEY_free(ecdh); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 656 | } |
| 657 | return TSI_OK; |
| 658 | } |
| 659 | |
| 660 | /* Extracts the CN and the SANs from an X509 cert as a peer object. */ |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 661 | static tsi_result extract_x509_subject_names_from_pem_cert(const char *pem_cert, |
| 662 | tsi_peer *peer) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 663 | tsi_result result = TSI_OK; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 664 | X509 *cert = NULL; |
| 665 | BIO *pem; |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 666 | pem = BIO_new_mem_buf((void *)pem_cert, (int)strlen(pem_cert)); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 667 | if (pem == NULL) return TSI_OUT_OF_RESOURCES; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 668 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 669 | cert = PEM_read_bio_X509(pem, NULL, NULL, ""); |
| 670 | if (cert == NULL) { |
| 671 | gpr_log(GPR_ERROR, "Invalid certificate"); |
| 672 | result = TSI_INVALID_ARGUMENT; |
| 673 | } else { |
| 674 | result = peer_from_x509(cert, 0, peer); |
| 675 | } |
| 676 | if (cert != NULL) X509_free(cert); |
| 677 | BIO_free(pem); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 678 | return result; |
| 679 | } |
| 680 | |
| 681 | /* Builds the alpn protocol name list according to rfc 7301. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 682 | static tsi_result build_alpn_protocol_name_list( |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 683 | const char **alpn_protocols, uint16_t num_alpn_protocols, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 684 | unsigned char **protocol_name_list, size_t *protocol_name_list_length) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 685 | uint16_t i; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 686 | unsigned char *current; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 687 | *protocol_name_list = NULL; |
| 688 | *protocol_name_list_length = 0; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 689 | if (num_alpn_protocols == 0) return TSI_INVALID_ARGUMENT; |
| 690 | for (i = 0; i < num_alpn_protocols; i++) { |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 691 | size_t length = alpn_protocols[i] == NULL ? 0 : strlen(alpn_protocols[i]); |
| 692 | if (length == 0 || length > 255) { |
| 693 | gpr_log(GPR_ERROR, "Invalid protocol name length: %d.", (int)length); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 694 | return TSI_INVALID_ARGUMENT; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 695 | } |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 696 | *protocol_name_list_length += length + 1; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 697 | } |
Nicolas "Pixel" Noble | 7c9a154 | 2016-03-26 01:33:34 +0100 | [diff] [blame] | 698 | *protocol_name_list = gpr_malloc(*protocol_name_list_length); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 699 | if (*protocol_name_list == NULL) return TSI_OUT_OF_RESOURCES; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 700 | current = *protocol_name_list; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 701 | for (i = 0; i < num_alpn_protocols; i++) { |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 702 | size_t length = strlen(alpn_protocols[i]); |
| 703 | *(current++) = (uint8_t)length; /* max checked above. */ |
| 704 | memcpy(current, alpn_protocols[i], length); |
| 705 | current += length; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 706 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 707 | /* Safety check. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 708 | if ((current < *protocol_name_list) || |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 709 | ((uintptr_t)(current - *protocol_name_list) != |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 710 | *protocol_name_list_length)) { |
| 711 | return TSI_INTERNAL_ERROR; |
| 712 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 713 | return TSI_OK; |
| 714 | } |
| 715 | |
Deepak Lukose | dba4c5f | 2016-03-25 12:54:25 -0700 | [diff] [blame] | 716 | // The verification callback is used for clients that don't really care about |
| 717 | // the server's certificate, but we need to pull it anyway, in case a higher |
| 718 | // layer wants to look at it. In this case the verification may fail, but |
| 719 | // we don't really care. |
| 720 | static int NullVerifyCallback(int preverify_ok, X509_STORE_CTX *ctx) { |
| 721 | return 1; |
| 722 | } |
| 723 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 724 | /* --- tsi_frame_protector methods implementation. ---*/ |
| 725 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 726 | static tsi_result ssl_protector_protect(tsi_frame_protector *self, |
| 727 | const unsigned char *unprotected_bytes, |
| 728 | size_t *unprotected_bytes_size, |
| 729 | unsigned char *protected_output_frames, |
| 730 | size_t *protected_output_frames_size) { |
| 731 | tsi_ssl_frame_protector *impl = (tsi_ssl_frame_protector *)self; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 732 | int read_from_ssl; |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 733 | size_t available; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 734 | tsi_result result = TSI_OK; |
| 735 | |
| 736 | /* First see if we have some pending data in the SSL BIO. */ |
Julien Boeuf | 01ac4f0 | 2015-10-09 16:08:24 -0700 | [diff] [blame] | 737 | int pending_in_ssl = (int)BIO_pending(impl->from_ssl); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 738 | if (pending_in_ssl > 0) { |
| 739 | *unprotected_bytes_size = 0; |
| 740 | GPR_ASSERT(*protected_output_frames_size <= INT_MAX); |
| 741 | read_from_ssl = BIO_read(impl->from_ssl, protected_output_frames, |
| 742 | (int)*protected_output_frames_size); |
| 743 | if (read_from_ssl < 0) { |
| 744 | gpr_log(GPR_ERROR, |
| 745 | "Could not read from BIO even though some data is pending"); |
| 746 | return TSI_INTERNAL_ERROR; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 747 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 748 | *protected_output_frames_size = (size_t)read_from_ssl; |
| 749 | return TSI_OK; |
| 750 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 751 | |
| 752 | /* Now see if we can send a complete frame. */ |
| 753 | available = impl->buffer_size - impl->buffer_offset; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 754 | if (available > *unprotected_bytes_size) { |
| 755 | /* If we cannot, just copy the data in our internal buffer. */ |
| 756 | memcpy(impl->buffer + impl->buffer_offset, unprotected_bytes, |
| 757 | *unprotected_bytes_size); |
| 758 | impl->buffer_offset += *unprotected_bytes_size; |
| 759 | *protected_output_frames_size = 0; |
| 760 | return TSI_OK; |
| 761 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 762 | |
| 763 | /* If we can, prepare the buffer, send it to SSL_write and read. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 764 | memcpy(impl->buffer + impl->buffer_offset, unprotected_bytes, available); |
| 765 | result = do_ssl_write(impl->ssl, impl->buffer, impl->buffer_size); |
| 766 | if (result != TSI_OK) return result; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 767 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 768 | GPR_ASSERT(*protected_output_frames_size <= INT_MAX); |
| 769 | read_from_ssl = BIO_read(impl->from_ssl, protected_output_frames, |
| 770 | (int)*protected_output_frames_size); |
| 771 | if (read_from_ssl < 0) { |
| 772 | gpr_log(GPR_ERROR, "Could not read from BIO after SSL_write."); |
| 773 | return TSI_INTERNAL_ERROR; |
| 774 | } |
| 775 | *protected_output_frames_size = (size_t)read_from_ssl; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 776 | *unprotected_bytes_size = available; |
| 777 | impl->buffer_offset = 0; |
| 778 | return TSI_OK; |
| 779 | } |
| 780 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 781 | static tsi_result ssl_protector_protect_flush( |
| 782 | tsi_frame_protector *self, unsigned char *protected_output_frames, |
| 783 | size_t *protected_output_frames_size, size_t *still_pending_size) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 784 | tsi_result result = TSI_OK; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 785 | tsi_ssl_frame_protector *impl = (tsi_ssl_frame_protector *)self; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 786 | int read_from_ssl = 0; |
Craig Tiller | 3121fd4 | 2015-09-10 09:56:20 -0700 | [diff] [blame] | 787 | int pending; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 788 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 789 | if (impl->buffer_offset != 0) { |
| 790 | result = do_ssl_write(impl->ssl, impl->buffer, impl->buffer_offset); |
| 791 | if (result != TSI_OK) return result; |
| 792 | impl->buffer_offset = 0; |
| 793 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 794 | |
Julien Boeuf | 01ac4f0 | 2015-10-09 16:08:24 -0700 | [diff] [blame] | 795 | pending = (int)BIO_pending(impl->from_ssl); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 796 | GPR_ASSERT(pending >= 0); |
| 797 | *still_pending_size = (size_t)pending; |
| 798 | if (*still_pending_size == 0) return TSI_OK; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 799 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 800 | GPR_ASSERT(*protected_output_frames_size <= INT_MAX); |
| 801 | read_from_ssl = BIO_read(impl->from_ssl, protected_output_frames, |
| 802 | (int)*protected_output_frames_size); |
| 803 | if (read_from_ssl <= 0) { |
| 804 | gpr_log(GPR_ERROR, "Could not read from BIO after SSL_write."); |
| 805 | return TSI_INTERNAL_ERROR; |
| 806 | } |
| 807 | *protected_output_frames_size = (size_t)read_from_ssl; |
Julien Boeuf | 01ac4f0 | 2015-10-09 16:08:24 -0700 | [diff] [blame] | 808 | pending = (int)BIO_pending(impl->from_ssl); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 809 | GPR_ASSERT(pending >= 0); |
| 810 | *still_pending_size = (size_t)pending; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 811 | return TSI_OK; |
| 812 | } |
| 813 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 814 | static tsi_result ssl_protector_unprotect( |
| 815 | tsi_frame_protector *self, const unsigned char *protected_frames_bytes, |
| 816 | size_t *protected_frames_bytes_size, unsigned char *unprotected_bytes, |
| 817 | size_t *unprotected_bytes_size) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 818 | tsi_result result = TSI_OK; |
| 819 | int written_into_ssl = 0; |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 820 | size_t output_bytes_size = *unprotected_bytes_size; |
| 821 | size_t output_bytes_offset = 0; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 822 | tsi_ssl_frame_protector *impl = (tsi_ssl_frame_protector *)self; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 823 | |
| 824 | /* First, try to read remaining data from ssl. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 825 | result = do_ssl_read(impl->ssl, unprotected_bytes, unprotected_bytes_size); |
| 826 | if (result != TSI_OK) return result; |
| 827 | if (*unprotected_bytes_size == output_bytes_size) { |
| 828 | /* We have read everything we could and cannot process any more input. */ |
| 829 | *protected_frames_bytes_size = 0; |
| 830 | return TSI_OK; |
| 831 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 832 | output_bytes_offset = *unprotected_bytes_size; |
| 833 | unprotected_bytes += output_bytes_offset; |
| 834 | *unprotected_bytes_size = output_bytes_size - output_bytes_offset; |
| 835 | |
| 836 | /* Then, try to write some data to ssl. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 837 | GPR_ASSERT(*protected_frames_bytes_size <= INT_MAX); |
| 838 | written_into_ssl = BIO_write(impl->into_ssl, protected_frames_bytes, |
| 839 | (int)*protected_frames_bytes_size); |
| 840 | if (written_into_ssl < 0) { |
| 841 | gpr_log(GPR_ERROR, "Sending protected frame to ssl failed with %d", |
| 842 | written_into_ssl); |
| 843 | return TSI_INTERNAL_ERROR; |
| 844 | } |
| 845 | *protected_frames_bytes_size = (size_t)written_into_ssl; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 846 | |
| 847 | /* Now try to read some data again. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 848 | result = do_ssl_read(impl->ssl, unprotected_bytes, unprotected_bytes_size); |
| 849 | if (result == TSI_OK) { |
| 850 | /* Don't forget to output the total number of bytes read. */ |
| 851 | *unprotected_bytes_size += output_bytes_offset; |
| 852 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 853 | return result; |
| 854 | } |
| 855 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 856 | static void ssl_protector_destroy(tsi_frame_protector *self) { |
| 857 | tsi_ssl_frame_protector *impl = (tsi_ssl_frame_protector *)self; |
Nicolas "Pixel" Noble | 7c9a154 | 2016-03-26 01:33:34 +0100 | [diff] [blame] | 858 | if (impl->buffer != NULL) gpr_free(impl->buffer); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 859 | if (impl->ssl != NULL) SSL_free(impl->ssl); |
Nicolas "Pixel" Noble | 7c9a154 | 2016-03-26 01:33:34 +0100 | [diff] [blame] | 860 | gpr_free(self); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 861 | } |
| 862 | |
| 863 | static const tsi_frame_protector_vtable frame_protector_vtable = { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 864 | ssl_protector_protect, ssl_protector_protect_flush, ssl_protector_unprotect, |
| 865 | ssl_protector_destroy, |
Craig Tiller | d6c98df | 2015-08-18 09:33:44 -0700 | [diff] [blame] | 866 | }; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 867 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 868 | /* --- tsi_handshaker methods implementation. ---*/ |
| 869 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 870 | static tsi_result ssl_handshaker_get_bytes_to_send_to_peer(tsi_handshaker *self, |
| 871 | unsigned char *bytes, |
| 872 | size_t *bytes_size) { |
| 873 | tsi_ssl_handshaker *impl = (tsi_ssl_handshaker *)self; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 874 | int bytes_read_from_ssl = 0; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 875 | if (bytes == NULL || bytes_size == NULL || *bytes_size == 0 || |
| 876 | *bytes_size > INT_MAX) { |
| 877 | return TSI_INVALID_ARGUMENT; |
| 878 | } |
| 879 | GPR_ASSERT(*bytes_size <= INT_MAX); |
| 880 | bytes_read_from_ssl = BIO_read(impl->from_ssl, bytes, (int)*bytes_size); |
| 881 | if (bytes_read_from_ssl < 0) { |
| 882 | *bytes_size = 0; |
| 883 | if (!BIO_should_retry(impl->from_ssl)) { |
| 884 | impl->result = TSI_INTERNAL_ERROR; |
| 885 | return impl->result; |
| 886 | } else { |
| 887 | return TSI_OK; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 888 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 889 | } |
| 890 | *bytes_size = (size_t)bytes_read_from_ssl; |
| 891 | return BIO_pending(impl->from_ssl) == 0 ? TSI_OK : TSI_INCOMPLETE_DATA; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 892 | } |
| 893 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 894 | static tsi_result ssl_handshaker_get_result(tsi_handshaker *self) { |
| 895 | tsi_ssl_handshaker *impl = (tsi_ssl_handshaker *)self; |
| 896 | if ((impl->result == TSI_HANDSHAKE_IN_PROGRESS) && |
| 897 | SSL_is_init_finished(impl->ssl)) { |
| 898 | impl->result = TSI_OK; |
| 899 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 900 | return impl->result; |
| 901 | } |
| 902 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 903 | static tsi_result ssl_handshaker_process_bytes_from_peer( |
| 904 | tsi_handshaker *self, const unsigned char *bytes, size_t *bytes_size) { |
| 905 | tsi_ssl_handshaker *impl = (tsi_ssl_handshaker *)self; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 906 | int bytes_written_into_ssl_size = 0; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 907 | if (bytes == NULL || bytes_size == 0 || *bytes_size > INT_MAX) { |
| 908 | return TSI_INVALID_ARGUMENT; |
| 909 | } |
| 910 | GPR_ASSERT(*bytes_size <= INT_MAX); |
| 911 | bytes_written_into_ssl_size = |
| 912 | BIO_write(impl->into_ssl, bytes, (int)*bytes_size); |
| 913 | if (bytes_written_into_ssl_size < 0) { |
| 914 | gpr_log(GPR_ERROR, "Could not write to memory BIO."); |
| 915 | impl->result = TSI_INTERNAL_ERROR; |
| 916 | return impl->result; |
| 917 | } |
| 918 | *bytes_size = (size_t)bytes_written_into_ssl_size; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 919 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 920 | if (!tsi_handshaker_is_in_progress(self)) { |
| 921 | impl->result = TSI_OK; |
| 922 | return impl->result; |
| 923 | } else { |
| 924 | /* Get ready to get some bytes from SSL. */ |
| 925 | int ssl_result = SSL_do_handshake(impl->ssl); |
| 926 | ssl_result = SSL_get_error(impl->ssl, ssl_result); |
| 927 | switch (ssl_result) { |
| 928 | case SSL_ERROR_WANT_READ: |
| 929 | if (BIO_pending(impl->from_ssl) == 0) { |
| 930 | /* We need more data. */ |
| 931 | return TSI_INCOMPLETE_DATA; |
| 932 | } else { |
| 933 | return TSI_OK; |
| 934 | } |
| 935 | case SSL_ERROR_NONE: |
| 936 | return TSI_OK; |
| 937 | default: { |
| 938 | char err_str[256]; |
| 939 | ERR_error_string_n(ERR_get_error(), err_str, sizeof(err_str)); |
| 940 | gpr_log(GPR_ERROR, "Handshake failed with fatal error %s: %s.", |
| 941 | ssl_error_string(ssl_result), err_str); |
| 942 | impl->result = TSI_PROTOCOL_FAILURE; |
| 943 | return impl->result; |
| 944 | } |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 945 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 946 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 947 | } |
| 948 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 949 | static tsi_result ssl_handshaker_extract_peer(tsi_handshaker *self, |
| 950 | tsi_peer *peer) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 951 | tsi_result result = TSI_OK; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 952 | const unsigned char *alpn_selected = NULL; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 953 | unsigned int alpn_selected_len; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 954 | tsi_ssl_handshaker *impl = (tsi_ssl_handshaker *)self; |
| 955 | X509 *peer_cert = SSL_get_peer_certificate(impl->ssl); |
| 956 | if (peer_cert != NULL) { |
| 957 | result = peer_from_x509(peer_cert, 1, peer); |
| 958 | X509_free(peer_cert); |
| 959 | if (result != TSI_OK) return result; |
| 960 | } |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 961 | #if TSI_OPENSSL_ALPN_SUPPORT |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 962 | SSL_get0_alpn_selected(impl->ssl, &alpn_selected, &alpn_selected_len); |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 963 | #endif /* TSI_OPENSSL_ALPN_SUPPORT */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 964 | if (alpn_selected == NULL) { |
| 965 | /* Try npn. */ |
| 966 | SSL_get0_next_proto_negotiated(impl->ssl, &alpn_selected, |
| 967 | &alpn_selected_len); |
| 968 | } |
| 969 | if (alpn_selected != NULL) { |
| 970 | size_t i; |
| 971 | tsi_peer_property *new_properties = |
Craig Tiller | 6f41788 | 2017-02-16 14:09:39 -0800 | [diff] [blame] | 972 | gpr_zalloc(sizeof(*new_properties) * (peer->property_count + 1)); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 973 | for (i = 0; i < peer->property_count; i++) { |
| 974 | new_properties[i] = peer->properties[i]; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 975 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 976 | result = tsi_construct_string_peer_property( |
| 977 | TSI_SSL_ALPN_SELECTED_PROTOCOL, (const char *)alpn_selected, |
| 978 | alpn_selected_len, &new_properties[peer->property_count]); |
| 979 | if (result != TSI_OK) { |
Nicolas "Pixel" Noble | 7c9a154 | 2016-03-26 01:33:34 +0100 | [diff] [blame] | 980 | gpr_free(new_properties); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 981 | return result; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 982 | } |
Nicolas "Pixel" Noble | 7c9a154 | 2016-03-26 01:33:34 +0100 | [diff] [blame] | 983 | if (peer->properties != NULL) gpr_free(peer->properties); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 984 | peer->property_count++; |
| 985 | peer->properties = new_properties; |
| 986 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 987 | return result; |
| 988 | } |
| 989 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 990 | static tsi_result ssl_handshaker_create_frame_protector( |
| 991 | tsi_handshaker *self, size_t *max_output_protected_frame_size, |
| 992 | tsi_frame_protector **protector) { |
| 993 | size_t actual_max_output_protected_frame_size = |
| 994 | TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND; |
| 995 | tsi_ssl_handshaker *impl = (tsi_ssl_handshaker *)self; |
Craig Tiller | 6f41788 | 2017-02-16 14:09:39 -0800 | [diff] [blame] | 996 | tsi_ssl_frame_protector *protector_impl = gpr_zalloc(sizeof(*protector_impl)); |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 997 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 998 | if (max_output_protected_frame_size != NULL) { |
| 999 | if (*max_output_protected_frame_size > |
| 1000 | TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND) { |
| 1001 | *max_output_protected_frame_size = |
| 1002 | TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND; |
| 1003 | } else if (*max_output_protected_frame_size < |
| 1004 | TSI_SSL_MAX_PROTECTED_FRAME_SIZE_LOWER_BOUND) { |
| 1005 | *max_output_protected_frame_size = |
| 1006 | TSI_SSL_MAX_PROTECTED_FRAME_SIZE_LOWER_BOUND; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1007 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1008 | actual_max_output_protected_frame_size = *max_output_protected_frame_size; |
| 1009 | } |
| 1010 | protector_impl->buffer_size = |
| 1011 | actual_max_output_protected_frame_size - TSI_SSL_MAX_PROTECTION_OVERHEAD; |
Nicolas "Pixel" Noble | 7c9a154 | 2016-03-26 01:33:34 +0100 | [diff] [blame] | 1012 | protector_impl->buffer = gpr_malloc(protector_impl->buffer_size); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1013 | if (protector_impl->buffer == NULL) { |
| 1014 | gpr_log(GPR_ERROR, |
| 1015 | "Could not allocated buffer for tsi_ssl_frame_protector."); |
Nicolas "Pixel" Noble | 7c9a154 | 2016-03-26 01:33:34 +0100 | [diff] [blame] | 1016 | gpr_free(protector_impl); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1017 | return TSI_INTERNAL_ERROR; |
| 1018 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1019 | |
| 1020 | /* Transfer ownership of ssl to the frame protector. It is OK as the caller |
| 1021 | * cannot call anything else but destroy on the handshaker after this call. */ |
| 1022 | protector_impl->ssl = impl->ssl; |
| 1023 | impl->ssl = NULL; |
| 1024 | protector_impl->into_ssl = impl->into_ssl; |
| 1025 | protector_impl->from_ssl = impl->from_ssl; |
| 1026 | |
| 1027 | protector_impl->base.vtable = &frame_protector_vtable; |
| 1028 | *protector = &protector_impl->base; |
| 1029 | return TSI_OK; |
| 1030 | } |
| 1031 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1032 | static void ssl_handshaker_destroy(tsi_handshaker *self) { |
| 1033 | tsi_ssl_handshaker *impl = (tsi_ssl_handshaker *)self; |
| 1034 | SSL_free(impl->ssl); /* The BIO objects are owned by ssl */ |
Nicolas "Pixel" Noble | 7c9a154 | 2016-03-26 01:33:34 +0100 | [diff] [blame] | 1035 | gpr_free(impl); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1036 | } |
| 1037 | |
| 1038 | static const tsi_handshaker_vtable handshaker_vtable = { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1039 | ssl_handshaker_get_bytes_to_send_to_peer, |
Craig Tiller | f40df23 | 2016-03-25 13:38:14 -0700 | [diff] [blame] | 1040 | ssl_handshaker_process_bytes_from_peer, |
| 1041 | ssl_handshaker_get_result, |
| 1042 | ssl_handshaker_extract_peer, |
| 1043 | ssl_handshaker_create_frame_protector, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1044 | ssl_handshaker_destroy, |
jiangtaoli2016 | 20b9f94 | 2017-04-07 12:50:33 -0700 | [diff] [blame] | 1045 | NULL, |
Craig Tiller | d6c98df | 2015-08-18 09:33:44 -0700 | [diff] [blame] | 1046 | }; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1047 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1048 | /* --- tsi_ssl_handshaker_factory common methods. --- */ |
| 1049 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1050 | static tsi_result create_tsi_ssl_handshaker(SSL_CTX *ctx, int is_client, |
| 1051 | const char *server_name_indication, |
| 1052 | tsi_handshaker **handshaker) { |
| 1053 | SSL *ssl = SSL_new(ctx); |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1054 | BIO *into_ssl = NULL; |
| 1055 | BIO *from_ssl = NULL; |
| 1056 | tsi_ssl_handshaker *impl = NULL; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1057 | *handshaker = NULL; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1058 | if (ctx == NULL) { |
| 1059 | gpr_log(GPR_ERROR, "SSL Context is null. Should never happen."); |
| 1060 | return TSI_INTERNAL_ERROR; |
| 1061 | } |
| 1062 | if (ssl == NULL) { |
| 1063 | return TSI_OUT_OF_RESOURCES; |
| 1064 | } |
| 1065 | SSL_set_info_callback(ssl, ssl_info_callback); |
| 1066 | |
| 1067 | into_ssl = BIO_new(BIO_s_mem()); |
| 1068 | from_ssl = BIO_new(BIO_s_mem()); |
| 1069 | if (into_ssl == NULL || from_ssl == NULL) { |
| 1070 | gpr_log(GPR_ERROR, "BIO_new failed."); |
| 1071 | SSL_free(ssl); |
| 1072 | if (into_ssl != NULL) BIO_free(into_ssl); |
| 1073 | if (from_ssl != NULL) BIO_free(into_ssl); |
| 1074 | return TSI_OUT_OF_RESOURCES; |
| 1075 | } |
| 1076 | SSL_set_bio(ssl, into_ssl, from_ssl); |
| 1077 | if (is_client) { |
| 1078 | int ssl_result; |
| 1079 | SSL_set_connect_state(ssl); |
| 1080 | if (server_name_indication != NULL) { |
| 1081 | if (!SSL_set_tlsext_host_name(ssl, server_name_indication)) { |
| 1082 | gpr_log(GPR_ERROR, "Invalid server name indication %s.", |
| 1083 | server_name_indication); |
| 1084 | SSL_free(ssl); |
| 1085 | return TSI_INTERNAL_ERROR; |
| 1086 | } |
| 1087 | } |
| 1088 | ssl_result = SSL_do_handshake(ssl); |
| 1089 | ssl_result = SSL_get_error(ssl, ssl_result); |
| 1090 | if (ssl_result != SSL_ERROR_WANT_READ) { |
| 1091 | gpr_log(GPR_ERROR, |
| 1092 | "Unexpected error received from first SSL_do_handshake call: %s", |
| 1093 | ssl_error_string(ssl_result)); |
| 1094 | SSL_free(ssl); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1095 | return TSI_INTERNAL_ERROR; |
| 1096 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1097 | } else { |
| 1098 | SSL_set_accept_state(ssl); |
| 1099 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1100 | |
Craig Tiller | 6f41788 | 2017-02-16 14:09:39 -0800 | [diff] [blame] | 1101 | impl = gpr_zalloc(sizeof(*impl)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1102 | impl->ssl = ssl; |
| 1103 | impl->into_ssl = into_ssl; |
| 1104 | impl->from_ssl = from_ssl; |
| 1105 | impl->result = TSI_HANDSHAKE_IN_PROGRESS; |
| 1106 | impl->base.vtable = &handshaker_vtable; |
| 1107 | *handshaker = &impl->base; |
| 1108 | return TSI_OK; |
| 1109 | } |
| 1110 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1111 | static int select_protocol_list(const unsigned char **out, |
| 1112 | unsigned char *outlen, |
| 1113 | const unsigned char *client_list, |
| 1114 | size_t client_list_len, |
| 1115 | const unsigned char *server_list, |
| 1116 | size_t server_list_len) { |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1117 | const unsigned char *client_current = client_list; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1118 | while ((unsigned int)(client_current - client_list) < client_list_len) { |
| 1119 | unsigned char client_current_len = *(client_current++); |
| 1120 | const unsigned char *server_current = server_list; |
| 1121 | while ((server_current >= server_list) && |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 1122 | (uintptr_t)(server_current - server_list) < server_list_len) { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1123 | unsigned char server_current_len = *(server_current++); |
| 1124 | if ((client_current_len == server_current_len) && |
| 1125 | !memcmp(client_current, server_current, server_current_len)) { |
| 1126 | *out = server_current; |
| 1127 | *outlen = server_current_len; |
| 1128 | return SSL_TLSEXT_ERR_OK; |
| 1129 | } |
| 1130 | server_current += server_current_len; |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1131 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1132 | client_current += client_current_len; |
| 1133 | } |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1134 | return SSL_TLSEXT_ERR_NOACK; |
| 1135 | } |
| 1136 | |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1137 | /* --- tsi_ssl_client_handshaker_factory methods implementation. --- */ |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1138 | |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1139 | tsi_result tsi_ssl_client_handshaker_factory_create_handshaker( |
| 1140 | tsi_ssl_client_handshaker_factory *self, const char *server_name_indication, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1141 | tsi_handshaker **handshaker) { |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1142 | return create_tsi_ssl_handshaker(self->ssl_context, 1, server_name_indication, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1143 | handshaker); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1144 | } |
| 1145 | |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1146 | void tsi_ssl_client_handshaker_factory_destroy( |
| 1147 | tsi_ssl_client_handshaker_factory *self) { |
| 1148 | if (self->ssl_context != NULL) SSL_CTX_free(self->ssl_context); |
| 1149 | if (self->alpn_protocol_list != NULL) gpr_free(self->alpn_protocol_list); |
| 1150 | gpr_free(self); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1151 | } |
| 1152 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1153 | static int client_handshaker_factory_npn_callback(SSL *ssl, unsigned char **out, |
| 1154 | unsigned char *outlen, |
| 1155 | const unsigned char *in, |
| 1156 | unsigned int inlen, |
| 1157 | void *arg) { |
| 1158 | tsi_ssl_client_handshaker_factory *factory = |
| 1159 | (tsi_ssl_client_handshaker_factory *)arg; |
| 1160 | return select_protocol_list((const unsigned char **)out, outlen, |
| 1161 | factory->alpn_protocol_list, |
| 1162 | factory->alpn_protocol_list_length, in, inlen); |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1163 | } |
| 1164 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1165 | /* --- tsi_ssl_server_handshaker_factory methods implementation. --- */ |
| 1166 | |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1167 | tsi_result tsi_ssl_server_handshaker_factory_create_handshaker( |
| 1168 | tsi_ssl_server_handshaker_factory *self, tsi_handshaker **handshaker) { |
| 1169 | if (self->ssl_context_count == 0) return TSI_INVALID_ARGUMENT; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1170 | /* Create the handshaker with the first context. We will switch if needed |
| 1171 | because of SNI in ssl_server_handshaker_factory_servername_callback. */ |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1172 | return create_tsi_ssl_handshaker(self->ssl_contexts[0], 0, NULL, handshaker); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1173 | } |
| 1174 | |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1175 | void tsi_ssl_server_handshaker_factory_destroy( |
| 1176 | tsi_ssl_server_handshaker_factory *self) { |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 1177 | size_t i; |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1178 | for (i = 0; i < self->ssl_context_count; i++) { |
| 1179 | if (self->ssl_contexts[i] != NULL) { |
| 1180 | SSL_CTX_free(self->ssl_contexts[i]); |
| 1181 | tsi_peer_destruct(&self->ssl_context_x509_subject_names[i]); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1182 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1183 | } |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1184 | if (self->ssl_contexts != NULL) gpr_free(self->ssl_contexts); |
| 1185 | if (self->ssl_context_x509_subject_names != NULL) { |
| 1186 | gpr_free(self->ssl_context_x509_subject_names); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1187 | } |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1188 | if (self->alpn_protocol_list != NULL) gpr_free(self->alpn_protocol_list); |
| 1189 | gpr_free(self); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1190 | } |
| 1191 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1192 | static int does_entry_match_name(const char *entry, size_t entry_length, |
| 1193 | const char *name) { |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1194 | const char *dot; |
| 1195 | const char *name_subdomain = NULL; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1196 | size_t name_length = strlen(name); |
Julien Boeuf | 9fff77e | 2015-02-24 16:50:35 -0800 | [diff] [blame] | 1197 | size_t name_subdomain_length; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1198 | if (entry_length == 0) return 0; |
Julien Boeuf | 9fff77e | 2015-02-24 16:50:35 -0800 | [diff] [blame] | 1199 | |
| 1200 | /* Take care of '.' terminations. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1201 | if (name[name_length - 1] == '.') { |
| 1202 | name_length--; |
| 1203 | } |
| 1204 | if (entry[entry_length - 1] == '.') { |
| 1205 | entry_length--; |
| 1206 | if (entry_length == 0) return 0; |
| 1207 | } |
Julien Boeuf | 9fff77e | 2015-02-24 16:50:35 -0800 | [diff] [blame] | 1208 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1209 | if ((name_length == entry_length) && |
| 1210 | strncmp(name, entry, entry_length) == 0) { |
| 1211 | return 1; /* Perfect match. */ |
| 1212 | } |
| 1213 | if (entry[0] != '*') return 0; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1214 | |
| 1215 | /* Wildchar subdomain matching. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1216 | if (entry_length < 3 || entry[1] != '.') { /* At least *.x */ |
| 1217 | gpr_log(GPR_ERROR, "Invalid wildchar entry."); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1218 | return 0; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1219 | } |
| 1220 | name_subdomain = strchr(name, '.'); |
| 1221 | if (name_subdomain == NULL) return 0; |
| 1222 | name_subdomain_length = strlen(name_subdomain); |
| 1223 | if (name_subdomain_length < 2) return 0; |
| 1224 | name_subdomain++; /* Starts after the dot. */ |
Julien Boeuf | 0170a6c | 2015-02-24 18:08:01 -0800 | [diff] [blame] | 1225 | name_subdomain_length--; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1226 | entry += 2; /* Remove *. */ |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1227 | entry_length -= 2; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1228 | dot = strchr(name_subdomain, '.'); |
| 1229 | if ((dot == NULL) || (dot == &name_subdomain[name_subdomain_length - 1])) { |
| 1230 | gpr_log(GPR_ERROR, "Invalid toplevel subdomain: %s", name_subdomain); |
| 1231 | return 0; |
| 1232 | } |
| 1233 | if (name_subdomain[name_subdomain_length - 1] == '.') { |
| 1234 | name_subdomain_length--; |
| 1235 | } |
| 1236 | return ((entry_length > 0) && (name_subdomain_length == entry_length) && |
| 1237 | strncmp(entry, name_subdomain, entry_length) == 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1238 | } |
| 1239 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1240 | static int ssl_server_handshaker_factory_servername_callback(SSL *ssl, int *ap, |
| 1241 | void *arg) { |
| 1242 | tsi_ssl_server_handshaker_factory *impl = |
| 1243 | (tsi_ssl_server_handshaker_factory *)arg; |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 1244 | size_t i = 0; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1245 | const char *servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name); |
| 1246 | if (servername == NULL || strlen(servername) == 0) { |
| 1247 | return SSL_TLSEXT_ERR_NOACK; |
| 1248 | } |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1249 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1250 | for (i = 0; i < impl->ssl_context_count; i++) { |
| 1251 | if (tsi_ssl_peer_matches_name(&impl->ssl_context_x509_subject_names[i], |
| 1252 | servername)) { |
| 1253 | SSL_set_SSL_CTX(ssl, impl->ssl_contexts[i]); |
| 1254 | return SSL_TLSEXT_ERR_OK; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1255 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1256 | } |
| 1257 | gpr_log(GPR_ERROR, "No match found for server name: %s.", servername); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1258 | return SSL_TLSEXT_ERR_ALERT_WARNING; |
| 1259 | } |
| 1260 | |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1261 | #if TSI_OPENSSL_ALPN_SUPPORT |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1262 | static int server_handshaker_factory_alpn_callback( |
| 1263 | SSL *ssl, const unsigned char **out, unsigned char *outlen, |
| 1264 | const unsigned char *in, unsigned int inlen, void *arg) { |
| 1265 | tsi_ssl_server_handshaker_factory *factory = |
| 1266 | (tsi_ssl_server_handshaker_factory *)arg; |
| 1267 | return select_protocol_list(out, outlen, in, inlen, |
| 1268 | factory->alpn_protocol_list, |
| 1269 | factory->alpn_protocol_list_length); |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1270 | } |
| 1271 | #endif /* TSI_OPENSSL_ALPN_SUPPORT */ |
| 1272 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1273 | static int server_handshaker_factory_npn_advertised_callback( |
| 1274 | SSL *ssl, const unsigned char **out, unsigned int *outlen, void *arg) { |
| 1275 | tsi_ssl_server_handshaker_factory *factory = |
| 1276 | (tsi_ssl_server_handshaker_factory *)arg; |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1277 | *out = factory->alpn_protocol_list; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1278 | GPR_ASSERT(factory->alpn_protocol_list_length <= UINT_MAX); |
| 1279 | *outlen = (unsigned int)factory->alpn_protocol_list_length; |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1280 | return SSL_TLSEXT_ERR_OK; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1281 | } |
| 1282 | |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1283 | /* --- tsi_ssl_handshaker_factory constructors. --- */ |
| 1284 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1285 | tsi_result tsi_create_ssl_client_handshaker_factory( |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1286 | const tsi_ssl_pem_key_cert_pair *pem_key_cert_pair, |
| 1287 | const char *pem_root_certs, const char *cipher_suites, |
| 1288 | const char **alpn_protocols, uint16_t num_alpn_protocols, |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1289 | tsi_ssl_client_handshaker_factory **factory) { |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1290 | SSL_CTX *ssl_context = NULL; |
| 1291 | tsi_ssl_client_handshaker_factory *impl = NULL; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1292 | tsi_result result = TSI_OK; |
| 1293 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1294 | gpr_once_init(&init_openssl_once, init_openssl); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1295 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1296 | if (factory == NULL) return TSI_INVALID_ARGUMENT; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1297 | *factory = NULL; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1298 | if (pem_root_certs == NULL) return TSI_INVALID_ARGUMENT; |
| 1299 | |
| 1300 | ssl_context = SSL_CTX_new(TLSv1_2_method()); |
| 1301 | if (ssl_context == NULL) { |
| 1302 | gpr_log(GPR_ERROR, "Could not create ssl context."); |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1303 | return TSI_INVALID_ARGUMENT; |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1304 | } |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1305 | |
Craig Tiller | 6f41788 | 2017-02-16 14:09:39 -0800 | [diff] [blame] | 1306 | impl = gpr_zalloc(sizeof(*impl)); |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1307 | impl->ssl_context = ssl_context; |
| 1308 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1309 | do { |
| 1310 | result = |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1311 | populate_ssl_context(ssl_context, pem_key_cert_pair, cipher_suites); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1312 | if (result != TSI_OK) break; |
| 1313 | result = ssl_ctx_load_verification_certs(ssl_context, pem_root_certs, |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1314 | strlen(pem_root_certs), NULL); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1315 | if (result != TSI_OK) { |
| 1316 | gpr_log(GPR_ERROR, "Cannot load server root certificates."); |
| 1317 | break; |
| 1318 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1319 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1320 | if (num_alpn_protocols != 0) { |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1321 | result = build_alpn_protocol_name_list(alpn_protocols, num_alpn_protocols, |
| 1322 | &impl->alpn_protocol_list, |
| 1323 | &impl->alpn_protocol_list_length); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1324 | if (result != TSI_OK) { |
| 1325 | gpr_log(GPR_ERROR, "Building alpn list failed with error %s.", |
| 1326 | tsi_result_to_string(result)); |
| 1327 | break; |
| 1328 | } |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1329 | #if TSI_OPENSSL_ALPN_SUPPORT |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1330 | GPR_ASSERT(impl->alpn_protocol_list_length < UINT_MAX); |
| 1331 | if (SSL_CTX_set_alpn_protos( |
| 1332 | ssl_context, impl->alpn_protocol_list, |
| 1333 | (unsigned int)impl->alpn_protocol_list_length)) { |
| 1334 | gpr_log(GPR_ERROR, "Could not set alpn protocol list to context."); |
| 1335 | result = TSI_INVALID_ARGUMENT; |
| 1336 | break; |
| 1337 | } |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1338 | #endif /* TSI_OPENSSL_ALPN_SUPPORT */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1339 | SSL_CTX_set_next_proto_select_cb( |
| 1340 | ssl_context, client_handshaker_factory_npn_callback, impl); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1341 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1342 | } while (0); |
| 1343 | if (result != TSI_OK) { |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1344 | tsi_ssl_client_handshaker_factory_destroy(impl); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1345 | return result; |
| 1346 | } |
| 1347 | SSL_CTX_set_verify(ssl_context, SSL_VERIFY_PEER, NULL); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1348 | /* TODO(jboeuf): Add revocation verification. */ |
| 1349 | |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1350 | *factory = impl; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1351 | return TSI_OK; |
| 1352 | } |
| 1353 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1354 | tsi_result tsi_create_ssl_server_handshaker_factory( |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1355 | const tsi_ssl_pem_key_cert_pair *pem_key_cert_pairs, |
| 1356 | size_t num_key_cert_pairs, const char *pem_client_root_certs, |
| 1357 | int force_client_auth, const char *cipher_suites, |
| 1358 | const char **alpn_protocols, uint16_t num_alpn_protocols, |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1359 | tsi_ssl_server_handshaker_factory **factory) { |
Deepak Lukose | dba4c5f | 2016-03-25 12:54:25 -0700 | [diff] [blame] | 1360 | return tsi_create_ssl_server_handshaker_factory_ex( |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1361 | pem_key_cert_pairs, num_key_cert_pairs, pem_client_root_certs, |
Deepak Lukose | dba4c5f | 2016-03-25 12:54:25 -0700 | [diff] [blame] | 1362 | force_client_auth ? TSI_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY |
| 1363 | : TSI_DONT_REQUEST_CLIENT_CERTIFICATE, |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1364 | cipher_suites, alpn_protocols, num_alpn_protocols, factory); |
Deepak Lukose | dba4c5f | 2016-03-25 12:54:25 -0700 | [diff] [blame] | 1365 | } |
| 1366 | |
| 1367 | tsi_result tsi_create_ssl_server_handshaker_factory_ex( |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1368 | const tsi_ssl_pem_key_cert_pair *pem_key_cert_pairs, |
| 1369 | size_t num_key_cert_pairs, const char *pem_client_root_certs, |
Deepak Lukose | dba4c5f | 2016-03-25 12:54:25 -0700 | [diff] [blame] | 1370 | tsi_client_certificate_request_type client_certificate_request, |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1371 | const char *cipher_suites, const char **alpn_protocols, |
| 1372 | uint16_t num_alpn_protocols, tsi_ssl_server_handshaker_factory **factory) { |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1373 | tsi_ssl_server_handshaker_factory *impl = NULL; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1374 | tsi_result result = TSI_OK; |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 1375 | size_t i = 0; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1376 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1377 | gpr_once_init(&init_openssl_once, init_openssl); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1378 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1379 | if (factory == NULL) return TSI_INVALID_ARGUMENT; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1380 | *factory = NULL; |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1381 | if (num_key_cert_pairs == 0 || pem_key_cert_pairs == NULL) { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1382 | return TSI_INVALID_ARGUMENT; |
| 1383 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1384 | |
Craig Tiller | 6f41788 | 2017-02-16 14:09:39 -0800 | [diff] [blame] | 1385 | impl = gpr_zalloc(sizeof(*impl)); |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1386 | impl->ssl_contexts = gpr_zalloc(num_key_cert_pairs * sizeof(SSL_CTX *)); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1387 | impl->ssl_context_x509_subject_names = |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1388 | gpr_zalloc(num_key_cert_pairs * sizeof(tsi_peer)); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1389 | if (impl->ssl_contexts == NULL || |
| 1390 | impl->ssl_context_x509_subject_names == NULL) { |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1391 | tsi_ssl_server_handshaker_factory_destroy(impl); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1392 | return TSI_OUT_OF_RESOURCES; |
| 1393 | } |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1394 | impl->ssl_context_count = num_key_cert_pairs; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1395 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1396 | if (num_alpn_protocols > 0) { |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1397 | result = build_alpn_protocol_name_list(alpn_protocols, num_alpn_protocols, |
| 1398 | &impl->alpn_protocol_list, |
| 1399 | &impl->alpn_protocol_list_length); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1400 | if (result != TSI_OK) { |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1401 | tsi_ssl_server_handshaker_factory_destroy(impl); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1402 | return result; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1403 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1404 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1405 | |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1406 | for (i = 0; i < num_key_cert_pairs; i++) { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1407 | do { |
| 1408 | impl->ssl_contexts[i] = SSL_CTX_new(TLSv1_2_method()); |
| 1409 | if (impl->ssl_contexts[i] == NULL) { |
| 1410 | gpr_log(GPR_ERROR, "Could not create ssl context."); |
| 1411 | result = TSI_OUT_OF_RESOURCES; |
| 1412 | break; |
| 1413 | } |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1414 | result = populate_ssl_context(impl->ssl_contexts[i], |
| 1415 | &pem_key_cert_pairs[i], cipher_suites); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1416 | if (result != TSI_OK) break; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1417 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1418 | if (pem_client_root_certs != NULL) { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1419 | STACK_OF(X509_NAME) *root_names = NULL; |
| 1420 | result = ssl_ctx_load_verification_certs( |
| 1421 | impl->ssl_contexts[i], pem_client_root_certs, |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1422 | strlen(pem_client_root_certs), &root_names); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1423 | if (result != TSI_OK) { |
| 1424 | gpr_log(GPR_ERROR, "Invalid verification certs."); |
| 1425 | break; |
| 1426 | } |
| 1427 | SSL_CTX_set_client_CA_list(impl->ssl_contexts[i], root_names); |
Deepak Lukose | dba4c5f | 2016-03-25 12:54:25 -0700 | [diff] [blame] | 1428 | switch (client_certificate_request) { |
| 1429 | case TSI_DONT_REQUEST_CLIENT_CERTIFICATE: |
| 1430 | SSL_CTX_set_verify(impl->ssl_contexts[i], SSL_VERIFY_NONE, NULL); |
| 1431 | break; |
| 1432 | case TSI_REQUEST_CLIENT_CERTIFICATE_BUT_DONT_VERIFY: |
| 1433 | SSL_CTX_set_verify(impl->ssl_contexts[i], SSL_VERIFY_PEER, |
| 1434 | NullVerifyCallback); |
| 1435 | break; |
| 1436 | case TSI_REQUEST_CLIENT_CERTIFICATE_AND_VERIFY: |
| 1437 | SSL_CTX_set_verify(impl->ssl_contexts[i], SSL_VERIFY_PEER, NULL); |
| 1438 | break; |
| 1439 | case TSI_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_BUT_DONT_VERIFY: |
| 1440 | SSL_CTX_set_verify( |
| 1441 | impl->ssl_contexts[i], |
| 1442 | SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, |
| 1443 | NullVerifyCallback); |
| 1444 | break; |
| 1445 | case TSI_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY: |
| 1446 | SSL_CTX_set_verify( |
| 1447 | impl->ssl_contexts[i], |
| 1448 | SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, NULL); |
| 1449 | break; |
| 1450 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1451 | /* TODO(jboeuf): Add revocation verification. */ |
| 1452 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1453 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1454 | result = extract_x509_subject_names_from_pem_cert( |
Julien Boeuf | b71ef65 | 2017-04-12 21:44:49 -0700 | [diff] [blame] | 1455 | pem_key_cert_pairs[i].cert_chain, |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1456 | &impl->ssl_context_x509_subject_names[i]); |
| 1457 | if (result != TSI_OK) break; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1458 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1459 | SSL_CTX_set_tlsext_servername_callback( |
| 1460 | impl->ssl_contexts[i], |
| 1461 | ssl_server_handshaker_factory_servername_callback); |
| 1462 | SSL_CTX_set_tlsext_servername_arg(impl->ssl_contexts[i], impl); |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1463 | #if TSI_OPENSSL_ALPN_SUPPORT |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1464 | SSL_CTX_set_alpn_select_cb(impl->ssl_contexts[i], |
| 1465 | server_handshaker_factory_alpn_callback, impl); |
Julien Boeuf | d153132 | 2015-06-18 11:05:39 +0200 | [diff] [blame] | 1466 | #endif /* TSI_OPENSSL_ALPN_SUPPORT */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1467 | SSL_CTX_set_next_protos_advertised_cb( |
| 1468 | impl->ssl_contexts[i], |
| 1469 | server_handshaker_factory_npn_advertised_callback, impl); |
| 1470 | } while (0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1471 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1472 | if (result != TSI_OK) { |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1473 | tsi_ssl_server_handshaker_factory_destroy(impl); |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1474 | return result; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1475 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1476 | } |
Julien Boeuf | 935d02e | 2017-04-09 00:07:09 -0700 | [diff] [blame] | 1477 | *factory = impl; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1478 | return TSI_OK; |
| 1479 | } |
| 1480 | |
| 1481 | /* --- tsi_ssl utils. --- */ |
| 1482 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1483 | int tsi_ssl_peer_matches_name(const tsi_peer *peer, const char *name) { |
Julien Boeuf | b222b4d | 2015-01-15 17:01:39 -0800 | [diff] [blame] | 1484 | size_t i = 0; |
Julien Boeuf | 597a4f2 | 2015-02-23 15:57:14 -0800 | [diff] [blame] | 1485 | size_t san_count = 0; |
Craig Tiller | 45724b3 | 2015-09-22 10:42:19 -0700 | [diff] [blame] | 1486 | const tsi_peer_property *cn_property = NULL; |
Paul Querna | 47d841d | 2016-03-10 11:19:17 -0800 | [diff] [blame] | 1487 | int like_ip = looks_like_ip_address(name); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1488 | |
Julien Boeuf | 597a4f2 | 2015-02-23 15:57:14 -0800 | [diff] [blame] | 1489 | /* Check the SAN first. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1490 | for (i = 0; i < peer->property_count; i++) { |
| 1491 | const tsi_peer_property *property = &peer->properties[i]; |
| 1492 | if (property->name == NULL) continue; |
| 1493 | if (strcmp(property->name, |
| 1494 | TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY) == 0) { |
| 1495 | san_count++; |
Paul Querna | 47d841d | 2016-03-10 11:19:17 -0800 | [diff] [blame] | 1496 | |
| 1497 | if (!like_ip && does_entry_match_name(property->value.data, |
| 1498 | property->value.length, name)) { |
| 1499 | return 1; |
| 1500 | } else if (like_ip && |
| 1501 | strncmp(name, property->value.data, property->value.length) == |
| 1502 | 0 && |
| 1503 | strlen(name) == property->value.length) { |
| 1504 | /* IP Addresses are exact matches only. */ |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1505 | return 1; |
| 1506 | } |
| 1507 | } else if (strcmp(property->name, |
| 1508 | TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY) == 0) { |
| 1509 | cn_property = property; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1510 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1511 | } |
Julien Boeuf | 597a4f2 | 2015-02-23 15:57:14 -0800 | [diff] [blame] | 1512 | |
Paul Querna | 47d841d | 2016-03-10 11:19:17 -0800 | [diff] [blame] | 1513 | /* If there's no SAN, try the CN, but only if its not like an IP Address */ |
| 1514 | if (san_count == 0 && cn_property != NULL && !like_ip) { |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1515 | if (does_entry_match_name(cn_property->value.data, |
| 1516 | cn_property->value.length, name)) { |
| 1517 | return 1; |
Julien Boeuf | 597a4f2 | 2015-02-23 15:57:14 -0800 | [diff] [blame] | 1518 | } |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1519 | } |
Julien Boeuf | 597a4f2 | 2015-02-23 15:57:14 -0800 | [diff] [blame] | 1520 | |
Craig Tiller | a82950e | 2015-09-22 12:33:20 -0700 | [diff] [blame] | 1521 | return 0; /* Not found. */ |
Craig Tiller | 190d360 | 2015-02-18 09:23:38 -0800 | [diff] [blame] | 1522 | } |