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| 1 /* | |
| 2 * libjingle | |
| 3 * Copyright 2014 Google Inc. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright notice, | |
| 9 * this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 11 * this list of conditions and the following disclaimer in the documentation | |
| 12 * and/or other materials provided with the distribution. | |
| 13 * 3. The name of the author may not be used to endorse or promote products | |
| 14 * derived from this software without specific prior written permission. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
| 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
| 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
| 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
| 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
| 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
| 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #if defined(HAVE_SRTP) && defined(ENABLE_EXTERNAL_AUTH) | |
| 29 | |
| 30 #include "talk/session/media/externalhmac.h" | |
| 31 | |
| 32 #include <stdlib.h> // For malloc/free. | |
| 33 | |
| 34 extern "C" { | |
| 35 #ifdef SRTP_RELATIVE_PATH | |
| 36 #include "crypto_kernel.h" // NOLINT | |
| 37 #include "srtp.h" // NOLINT | |
| 38 #else | |
| 39 #include "third_party/libsrtp/srtp/crypto/include/crypto_kernel.h" | |
| 40 #include "third_party/libsrtp/srtp/include/srtp.h" | |
| 41 #endif // SRTP_RELATIVE_PATH | |
| 42 } | |
| 43 | |
| 44 #include "webrtc/base/logging.h" | |
| 45 | |
| 46 // Begin test case 0 */ | |
| 47 static const uint8_t kExternalHmacTestCase0Key[20] = { | |
| 48 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, | |
| 49 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, | |
| 50 0x0b, 0x0b, 0x0b, 0x0b | |
| 51 }; | |
| 52 | |
| 53 static const uint8_t kExternalHmacTestCase0Data[8] = { | |
| 54 0x48, 0x69, 0x20, 0x54, 0x68, 0x65, 0x72, 0x65 // "Hi There" | |
| 55 }; | |
| 56 | |
| 57 static const uint8_t kExternalHmacFakeTag[10] = { | |
| 58 0xba, 0xdd, 0xba, 0xdd, 0xba, 0xdd, 0xba, 0xdd, 0xba, 0xdd | |
| 59 }; | |
| 60 | |
| 61 static const auth_test_case_t kExternalHmacTestCase0 = { | |
| 62 20, // Octets in key | |
| 63 const_cast<uint8_t*>(kExternalHmacTestCase0Key), // Key | |
| 64 8, // Octets in data | |
| 65 const_cast<uint8_t*>(kExternalHmacTestCase0Data), // Data | |
| 66 10, // Octets in tag | |
| 67 const_cast<uint8_t*>(kExternalHmacFakeTag), // Tag | |
| 68 NULL // Pointer to next | |
| 69 // testcase | |
| 70 }; | |
| 71 | |
| 72 static const char kExternalHmacDescription[] = | |
| 73 "external hmac sha-1 authentication"; | |
| 74 | |
| 75 // auth_type_t external_hmac is the hmac metaobject | |
| 76 | |
| 77 static const auth_type_t external_hmac = { | |
| 78 external_hmac_alloc, | |
| 79 external_hmac_dealloc, | |
| 80 (auth_init_func) external_hmac_init, | |
| 81 (auth_compute_func) external_hmac_compute, | |
| 82 (auth_update_func) external_hmac_update, | |
| 83 (auth_start_func) external_hmac_start, | |
| 84 const_cast<char*>(kExternalHmacDescription), | |
| 85 0, // Instance count. | |
| 86 const_cast<auth_test_case_t*>(&kExternalHmacTestCase0), | |
| 87 NULL, // No debugging module. | |
| 88 EXTERNAL_HMAC_SHA1 | |
| 89 }; | |
| 90 | |
| 91 | |
| 92 err_status_t external_hmac_alloc(auth_t** a, int key_len, int out_len) { | |
| 93 uint8_t* pointer; | |
| 94 | |
| 95 // Check key length - note that we don't support keys larger | |
| 96 // than 20 bytes yet | |
| 97 if (key_len > 20) | |
| 98 return err_status_bad_param; | |
| 99 | |
| 100 // Check output length - should be less than 20 bytes/ | |
| 101 if (out_len > 20) | |
| 102 return err_status_bad_param; | |
| 103 | |
| 104 // Allocate memory for auth and hmac_ctx_t structures. | |
| 105 pointer = new uint8_t[(sizeof(ExternalHmacContext) + sizeof(auth_t))]; | |
| 106 if (pointer == NULL) | |
| 107 return err_status_alloc_fail; | |
| 108 | |
| 109 // Set pointers | |
| 110 *a = (auth_t *)pointer; | |
| 111 // |external_hmac| is const and libsrtp expects |type| to be non-const. | |
| 112 // const conversion is required. |external_hmac| is constant because we don't | |
| 113 // want to increase global count in Chrome. | |
| 114 (*a)->type = const_cast<auth_type_t*>(&external_hmac); | |
| 115 (*a)->state = pointer + sizeof(auth_t); | |
| 116 (*a)->out_len = out_len; | |
| 117 (*a)->key_len = key_len; | |
| 118 (*a)->prefix_len = 0; | |
| 119 | |
| 120 return err_status_ok; | |
| 121 } | |
| 122 | |
| 123 err_status_t external_hmac_dealloc(auth_t* a) { | |
| 124 // Zeroize entire state | |
| 125 memset((uint8_t *)a, 0, sizeof(ExternalHmacContext) + sizeof(auth_t)); | |
| 126 | |
| 127 // Free memory | |
| 128 delete[] a; | |
| 129 | |
| 130 return err_status_ok; | |
| 131 } | |
| 132 | |
| 133 err_status_t external_hmac_init(ExternalHmacContext* state, | |
| 134 const uint8_t* key, | |
| 135 int key_len) { | |
| 136 if (key_len > HMAC_KEY_LENGTH) | |
| 137 return err_status_bad_param; | |
| 138 | |
| 139 memset(state->key, 0, key_len); | |
| 140 memcpy(state->key, key, key_len); | |
| 141 state->key_length = key_len; | |
| 142 return err_status_ok; | |
| 143 } | |
| 144 | |
| 145 err_status_t external_hmac_start(ExternalHmacContext* state) { | |
| 146 return err_status_ok; | |
| 147 } | |
| 148 | |
| 149 err_status_t external_hmac_update(ExternalHmacContext* state, | |
| 150 const uint8_t* message, | |
| 151 int msg_octets) { | |
| 152 return err_status_ok; | |
| 153 } | |
| 154 | |
| 155 err_status_t external_hmac_compute(ExternalHmacContext* state, | |
| 156 const void* message, | |
| 157 int msg_octets, | |
| 158 int tag_len, | |
| 159 uint8_t* result) { | |
| 160 memcpy(result, kExternalHmacFakeTag, tag_len); | |
| 161 return err_status_ok; | |
| 162 } | |
| 163 | |
| 164 err_status_t external_crypto_init() { | |
| 165 // |external_hmac| is const. const_cast is required as libsrtp expects | |
| 166 // non-const. | |
| 167 err_status_t status = crypto_kernel_replace_auth_type( | |
| 168 const_cast<auth_type_t*>(&external_hmac), EXTERNAL_HMAC_SHA1); | |
| 169 if (status) { | |
| 170 LOG(LS_ERROR) << "Error in replacing default auth module, error: " | |
| 171 << status; | |
| 172 return err_status_fail; | |
| 173 } | |
| 174 return err_status_ok; | |
| 175 } | |
| 176 | |
| 177 #endif // defined(HAVE_SRTP) && defined(ENABLE_EXTERNAL_AUTH) | |
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Chromium Code Reviews
Issue 1691463002:
Move talk/session/media -> webrtc/pc (Closed)
Base URL: https://chromium.googlesource.com/external/webrtc.git@master