Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2014, Google Inc. |
| 2 | * |
| 3 | * Permission to use, copy, modify, and/or distribute this software for any |
| 4 | * purpose with or without fee is hereby granted, provided that the above |
| 5 | * copyright notice and this permission notice appear in all copies. |
| 6 | * |
| 7 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 8 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 9 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| 10 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 11 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| 12 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| 13 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
| 14 | |
| 15 | #include <assert.h> |
| 16 | #include <limits.h> |
| 17 | #include <string.h> |
| 18 | |
| 19 | #include <openssl/aead.h> |
| 20 | #include <openssl/cipher.h> |
| 21 | #include <openssl/err.h> |
| 22 | #include <openssl/hmac.h> |
| 23 | #include <openssl/md5.h> |
| 24 | #include <openssl/mem.h> |
| 25 | #include <openssl/sha.h> |
| 26 | |
| 27 | #include "internal.h" |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 28 | #include "../internal.h" |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 29 | |
| 30 | |
| 31 | typedef struct { |
| 32 | EVP_CIPHER_CTX cipher_ctx; |
| 33 | EVP_MD_CTX md_ctx; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 34 | } AEAD_SSL3_CTX; |
| 35 | |
| 36 | static int ssl3_mac(AEAD_SSL3_CTX *ssl3_ctx, uint8_t *out, unsigned *out_len, |
| 37 | const uint8_t *ad, size_t ad_len, const uint8_t *in, |
| 38 | size_t in_len) { |
| 39 | size_t md_size = EVP_MD_CTX_size(&ssl3_ctx->md_ctx); |
| 40 | size_t pad_len = (md_size == 20) ? 40 : 48; |
| 41 | |
| 42 | /* To allow for CBC mode which changes cipher length, |ad| doesn't include the |
| 43 | * length for legacy ciphers. */ |
| 44 | uint8_t ad_extra[2]; |
| 45 | ad_extra[0] = (uint8_t)(in_len >> 8); |
| 46 | ad_extra[1] = (uint8_t)(in_len & 0xff); |
| 47 | |
| 48 | EVP_MD_CTX md_ctx; |
| 49 | EVP_MD_CTX_init(&md_ctx); |
| 50 | |
| 51 | uint8_t pad[48]; |
| 52 | uint8_t tmp[EVP_MAX_MD_SIZE]; |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 53 | OPENSSL_memset(pad, 0x36, pad_len); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 54 | if (!EVP_MD_CTX_copy_ex(&md_ctx, &ssl3_ctx->md_ctx) || |
| 55 | !EVP_DigestUpdate(&md_ctx, pad, pad_len) || |
| 56 | !EVP_DigestUpdate(&md_ctx, ad, ad_len) || |
| 57 | !EVP_DigestUpdate(&md_ctx, ad_extra, sizeof(ad_extra)) || |
| 58 | !EVP_DigestUpdate(&md_ctx, in, in_len) || |
| 59 | !EVP_DigestFinal_ex(&md_ctx, tmp, NULL)) { |
| 60 | EVP_MD_CTX_cleanup(&md_ctx); |
| 61 | return 0; |
| 62 | } |
| 63 | |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 64 | OPENSSL_memset(pad, 0x5c, pad_len); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 65 | if (!EVP_MD_CTX_copy_ex(&md_ctx, &ssl3_ctx->md_ctx) || |
| 66 | !EVP_DigestUpdate(&md_ctx, pad, pad_len) || |
| 67 | !EVP_DigestUpdate(&md_ctx, tmp, md_size) || |
| 68 | !EVP_DigestFinal_ex(&md_ctx, out, out_len)) { |
| 69 | EVP_MD_CTX_cleanup(&md_ctx); |
| 70 | return 0; |
| 71 | } |
| 72 | EVP_MD_CTX_cleanup(&md_ctx); |
| 73 | return 1; |
| 74 | } |
| 75 | |
| 76 | static void aead_ssl3_cleanup(EVP_AEAD_CTX *ctx) { |
| 77 | AEAD_SSL3_CTX *ssl3_ctx = (AEAD_SSL3_CTX *)ctx->aead_state; |
| 78 | EVP_CIPHER_CTX_cleanup(&ssl3_ctx->cipher_ctx); |
| 79 | EVP_MD_CTX_cleanup(&ssl3_ctx->md_ctx); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 80 | OPENSSL_free(ssl3_ctx); |
| 81 | ctx->aead_state = NULL; |
| 82 | } |
| 83 | |
| 84 | static int aead_ssl3_init(EVP_AEAD_CTX *ctx, const uint8_t *key, size_t key_len, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 85 | size_t tag_len, enum evp_aead_direction_t dir, |
| 86 | const EVP_CIPHER *cipher, const EVP_MD *md) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 87 | if (tag_len != EVP_AEAD_DEFAULT_TAG_LENGTH && |
| 88 | tag_len != EVP_MD_size(md)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 89 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_UNSUPPORTED_TAG_SIZE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | if (key_len != EVP_AEAD_key_length(ctx->aead)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 94 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_KEY_LENGTH); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | size_t mac_key_len = EVP_MD_size(md); |
| 99 | size_t enc_key_len = EVP_CIPHER_key_length(cipher); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 100 | assert(mac_key_len + enc_key_len + EVP_CIPHER_iv_length(cipher) == key_len); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 101 | |
| 102 | AEAD_SSL3_CTX *ssl3_ctx = OPENSSL_malloc(sizeof(AEAD_SSL3_CTX)); |
| 103 | if (ssl3_ctx == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 104 | OPENSSL_PUT_ERROR(CIPHER, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 105 | return 0; |
| 106 | } |
| 107 | EVP_CIPHER_CTX_init(&ssl3_ctx->cipher_ctx); |
| 108 | EVP_MD_CTX_init(&ssl3_ctx->md_ctx); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 109 | |
| 110 | ctx->aead_state = ssl3_ctx; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 111 | if (!EVP_CipherInit_ex(&ssl3_ctx->cipher_ctx, cipher, NULL, &key[mac_key_len], |
| 112 | &key[mac_key_len + enc_key_len], |
| 113 | dir == evp_aead_seal) || |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 114 | !EVP_DigestInit_ex(&ssl3_ctx->md_ctx, md, NULL) || |
| 115 | !EVP_DigestUpdate(&ssl3_ctx->md_ctx, key, mac_key_len)) { |
| 116 | aead_ssl3_cleanup(ctx); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 117 | ctx->aead_state = NULL; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 118 | return 0; |
| 119 | } |
| 120 | EVP_CIPHER_CTX_set_padding(&ssl3_ctx->cipher_ctx, 0); |
| 121 | |
| 122 | return 1; |
| 123 | } |
| 124 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 125 | static int aead_ssl3_seal(const EVP_AEAD_CTX *ctx, uint8_t *out, |
| 126 | size_t *out_len, size_t max_out_len, |
| 127 | const uint8_t *nonce, size_t nonce_len, |
| 128 | const uint8_t *in, size_t in_len, |
| 129 | const uint8_t *ad, size_t ad_len) { |
| 130 | AEAD_SSL3_CTX *ssl3_ctx = (AEAD_SSL3_CTX *)ctx->aead_state; |
| 131 | size_t total = 0; |
| 132 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 133 | if (!ssl3_ctx->cipher_ctx.encrypt) { |
| 134 | /* Unlike a normal AEAD, an SSL3 AEAD may only be used in one direction. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 135 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_INVALID_OPERATION); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 136 | return 0; |
| 137 | } |
| 138 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 139 | if (in_len + EVP_AEAD_max_overhead(ctx->aead) < in_len || |
| 140 | in_len > INT_MAX) { |
| 141 | /* EVP_CIPHER takes int as input. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 142 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_TOO_LARGE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | if (max_out_len < in_len + EVP_AEAD_max_overhead(ctx->aead)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 147 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BUFFER_TOO_SMALL); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | if (nonce_len != 0) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 152 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_IV_TOO_LARGE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | if (ad_len != 11 - 2 /* length bytes */) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 157 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_INVALID_AD_SIZE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 158 | return 0; |
| 159 | } |
| 160 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 161 | /* Compute the MAC. This must be first in case the operation is being done |
| 162 | * in-place. */ |
| 163 | uint8_t mac[EVP_MAX_MD_SIZE]; |
| 164 | unsigned mac_len; |
| 165 | if (!ssl3_mac(ssl3_ctx, mac, &mac_len, ad, ad_len, in, in_len)) { |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | /* Encrypt the input. */ |
| 170 | int len; |
| 171 | if (!EVP_EncryptUpdate(&ssl3_ctx->cipher_ctx, out, &len, in, |
| 172 | (int)in_len)) { |
| 173 | return 0; |
| 174 | } |
| 175 | total = len; |
| 176 | |
| 177 | /* Feed the MAC into the cipher. */ |
| 178 | if (!EVP_EncryptUpdate(&ssl3_ctx->cipher_ctx, out + total, &len, mac, |
| 179 | (int)mac_len)) { |
| 180 | return 0; |
| 181 | } |
| 182 | total += len; |
| 183 | |
| 184 | unsigned block_size = EVP_CIPHER_CTX_block_size(&ssl3_ctx->cipher_ctx); |
| 185 | if (block_size > 1) { |
| 186 | assert(block_size <= 256); |
| 187 | assert(EVP_CIPHER_CTX_mode(&ssl3_ctx->cipher_ctx) == EVP_CIPH_CBC_MODE); |
| 188 | |
| 189 | /* Compute padding and feed that into the cipher. */ |
| 190 | uint8_t padding[256]; |
| 191 | unsigned padding_len = block_size - ((in_len + mac_len) % block_size); |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 192 | OPENSSL_memset(padding, 0, padding_len - 1); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 193 | padding[padding_len - 1] = padding_len - 1; |
| 194 | if (!EVP_EncryptUpdate(&ssl3_ctx->cipher_ctx, out + total, &len, padding, |
| 195 | (int)padding_len)) { |
| 196 | return 0; |
| 197 | } |
| 198 | total += len; |
| 199 | } |
| 200 | |
| 201 | if (!EVP_EncryptFinal_ex(&ssl3_ctx->cipher_ctx, out + total, &len)) { |
| 202 | return 0; |
| 203 | } |
| 204 | total += len; |
| 205 | |
| 206 | *out_len = total; |
| 207 | return 1; |
| 208 | } |
| 209 | |
| 210 | static int aead_ssl3_open(const EVP_AEAD_CTX *ctx, uint8_t *out, |
| 211 | size_t *out_len, size_t max_out_len, |
| 212 | const uint8_t *nonce, size_t nonce_len, |
| 213 | const uint8_t *in, size_t in_len, |
| 214 | const uint8_t *ad, size_t ad_len) { |
| 215 | AEAD_SSL3_CTX *ssl3_ctx = (AEAD_SSL3_CTX *)ctx->aead_state; |
| 216 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 217 | if (ssl3_ctx->cipher_ctx.encrypt) { |
| 218 | /* Unlike a normal AEAD, an SSL3 AEAD may only be used in one direction. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 219 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_INVALID_OPERATION); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 220 | return 0; |
| 221 | } |
| 222 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 223 | size_t mac_len = EVP_MD_CTX_size(&ssl3_ctx->md_ctx); |
| 224 | if (in_len < mac_len) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 225 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_DECRYPT); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | if (max_out_len < in_len) { |
| 230 | /* This requires that the caller provide space for the MAC, even though it |
| 231 | * will always be removed on return. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 232 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BUFFER_TOO_SMALL); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | if (nonce_len != 0) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 237 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_TOO_LARGE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 238 | return 0; |
| 239 | } |
| 240 | |
| 241 | if (ad_len != 11 - 2 /* length bytes */) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 242 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_INVALID_AD_SIZE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | if (in_len > INT_MAX) { |
| 247 | /* EVP_CIPHER takes int as input. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 248 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_TOO_LARGE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 249 | return 0; |
| 250 | } |
| 251 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 252 | /* Decrypt to get the plaintext + MAC + padding. */ |
| 253 | size_t total = 0; |
| 254 | int len; |
| 255 | if (!EVP_DecryptUpdate(&ssl3_ctx->cipher_ctx, out, &len, in, (int)in_len)) { |
| 256 | return 0; |
| 257 | } |
| 258 | total += len; |
| 259 | if (!EVP_DecryptFinal_ex(&ssl3_ctx->cipher_ctx, out + total, &len)) { |
| 260 | return 0; |
| 261 | } |
| 262 | total += len; |
| 263 | assert(total == in_len); |
| 264 | |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 265 | /* Remove CBC padding and MAC. This would normally be timing-sensitive, but |
| 266 | * SSLv3 CBC ciphers are already broken. Support will be removed eventually. |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 267 | * https://www.openssl.org/~bodo/ssl-poodle.pdf */ |
David Benjamin | c895d6b | 2016-08-11 13:26:41 -0400 | [diff] [blame] | 268 | size_t data_len; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 269 | if (EVP_CIPHER_CTX_mode(&ssl3_ctx->cipher_ctx) == EVP_CIPH_CBC_MODE) { |
| 270 | unsigned padding_length = out[total - 1]; |
| 271 | if (total < padding_length + 1 + mac_len) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 272 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_DECRYPT); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 273 | return 0; |
| 274 | } |
| 275 | /* The padding must be minimal. */ |
| 276 | if (padding_length + 1 > EVP_CIPHER_CTX_block_size(&ssl3_ctx->cipher_ctx)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 277 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_DECRYPT); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 278 | return 0; |
| 279 | } |
| 280 | data_len = total - padding_length - 1 - mac_len; |
| 281 | } else { |
| 282 | data_len = total - mac_len; |
| 283 | } |
| 284 | |
| 285 | /* Compute the MAC and compare against the one in the record. */ |
| 286 | uint8_t mac[EVP_MAX_MD_SIZE]; |
| 287 | if (!ssl3_mac(ssl3_ctx, mac, NULL, ad, ad_len, out, data_len)) { |
| 288 | return 0; |
| 289 | } |
| 290 | if (CRYPTO_memcmp(&out[data_len], mac, mac_len) != 0) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 291 | OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_DECRYPT); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | *out_len = data_len; |
| 296 | return 1; |
| 297 | } |
| 298 | |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 299 | static int aead_ssl3_get_iv(const EVP_AEAD_CTX *ctx, const uint8_t **out_iv, |
| 300 | size_t *out_iv_len) { |
| 301 | AEAD_SSL3_CTX *ssl3_ctx = (AEAD_SSL3_CTX *)ctx->aead_state; |
| 302 | const size_t iv_len = EVP_CIPHER_CTX_iv_length(&ssl3_ctx->cipher_ctx); |
| 303 | if (iv_len <= 1) { |
| 304 | return 0; |
| 305 | } |
| 306 | |
| 307 | *out_iv = ssl3_ctx->cipher_ctx.iv; |
| 308 | *out_iv_len = iv_len; |
| 309 | return 1; |
| 310 | } |
| 311 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 312 | static int aead_aes_128_cbc_sha1_ssl3_init(EVP_AEAD_CTX *ctx, const uint8_t *key, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 313 | size_t key_len, size_t tag_len, |
| 314 | enum evp_aead_direction_t dir) { |
| 315 | return aead_ssl3_init(ctx, key, key_len, tag_len, dir, EVP_aes_128_cbc(), |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 316 | EVP_sha1()); |
| 317 | } |
| 318 | |
| 319 | static int aead_aes_256_cbc_sha1_ssl3_init(EVP_AEAD_CTX *ctx, const uint8_t *key, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 320 | size_t key_len, size_t tag_len, |
| 321 | enum evp_aead_direction_t dir) { |
| 322 | return aead_ssl3_init(ctx, key, key_len, tag_len, dir, EVP_aes_256_cbc(), |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 323 | EVP_sha1()); |
| 324 | } |
| 325 | static int aead_des_ede3_cbc_sha1_ssl3_init(EVP_AEAD_CTX *ctx, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 326 | const uint8_t *key, size_t key_len, |
| 327 | size_t tag_len, |
| 328 | enum evp_aead_direction_t dir) { |
| 329 | return aead_ssl3_init(ctx, key, key_len, tag_len, dir, EVP_des_ede3_cbc(), |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 330 | EVP_sha1()); |
| 331 | } |
| 332 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 333 | static int aead_null_sha1_ssl3_init(EVP_AEAD_CTX *ctx, const uint8_t *key, |
| 334 | size_t key_len, size_t tag_len, |
| 335 | enum evp_aead_direction_t dir) { |
| 336 | return aead_ssl3_init(ctx, key, key_len, tag_len, dir, EVP_enc_null(), |
| 337 | EVP_sha1()); |
| 338 | } |
| 339 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 340 | static const EVP_AEAD aead_aes_128_cbc_sha1_ssl3 = { |
| 341 | SHA_DIGEST_LENGTH + 16 + 16, /* key len (SHA1 + AES128 + IV) */ |
| 342 | 0, /* nonce len */ |
| 343 | 16 + SHA_DIGEST_LENGTH, /* overhead (padding + SHA1) */ |
| 344 | SHA_DIGEST_LENGTH, /* max tag length */ |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 345 | NULL, /* init */ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 346 | aead_aes_128_cbc_sha1_ssl3_init, |
| 347 | aead_ssl3_cleanup, |
| 348 | aead_ssl3_seal, |
| 349 | aead_ssl3_open, |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 350 | aead_ssl3_get_iv, |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 351 | }; |
| 352 | |
| 353 | static const EVP_AEAD aead_aes_256_cbc_sha1_ssl3 = { |
| 354 | SHA_DIGEST_LENGTH + 32 + 16, /* key len (SHA1 + AES256 + IV) */ |
| 355 | 0, /* nonce len */ |
| 356 | 16 + SHA_DIGEST_LENGTH, /* overhead (padding + SHA1) */ |
| 357 | SHA_DIGEST_LENGTH, /* max tag length */ |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 358 | NULL, /* init */ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 359 | aead_aes_256_cbc_sha1_ssl3_init, |
| 360 | aead_ssl3_cleanup, |
| 361 | aead_ssl3_seal, |
| 362 | aead_ssl3_open, |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 363 | aead_ssl3_get_iv, |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 364 | }; |
| 365 | |
| 366 | static const EVP_AEAD aead_des_ede3_cbc_sha1_ssl3 = { |
| 367 | SHA_DIGEST_LENGTH + 24 + 8, /* key len (SHA1 + 3DES + IV) */ |
| 368 | 0, /* nonce len */ |
| 369 | 8 + SHA_DIGEST_LENGTH, /* overhead (padding + SHA1) */ |
| 370 | SHA_DIGEST_LENGTH, /* max tag length */ |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 371 | NULL, /* init */ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 372 | aead_des_ede3_cbc_sha1_ssl3_init, |
| 373 | aead_ssl3_cleanup, |
| 374 | aead_ssl3_seal, |
| 375 | aead_ssl3_open, |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 376 | aead_ssl3_get_iv, |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 377 | }; |
| 378 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 379 | static const EVP_AEAD aead_null_sha1_ssl3 = { |
| 380 | SHA_DIGEST_LENGTH, /* key len */ |
| 381 | 0, /* nonce len */ |
| 382 | SHA_DIGEST_LENGTH, /* overhead (SHA1) */ |
| 383 | SHA_DIGEST_LENGTH, /* max tag length */ |
| 384 | NULL, /* init */ |
| 385 | aead_null_sha1_ssl3_init, |
| 386 | aead_ssl3_cleanup, |
| 387 | aead_ssl3_seal, |
| 388 | aead_ssl3_open, |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 389 | NULL, /* get_iv */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 390 | }; |
| 391 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 392 | const EVP_AEAD *EVP_aead_aes_128_cbc_sha1_ssl3(void) { |
| 393 | return &aead_aes_128_cbc_sha1_ssl3; |
| 394 | } |
| 395 | |
| 396 | const EVP_AEAD *EVP_aead_aes_256_cbc_sha1_ssl3(void) { |
| 397 | return &aead_aes_256_cbc_sha1_ssl3; |
| 398 | } |
| 399 | |
| 400 | const EVP_AEAD *EVP_aead_des_ede3_cbc_sha1_ssl3(void) { |
| 401 | return &aead_des_ede3_cbc_sha1_ssl3; |
| 402 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 403 | |
| 404 | const EVP_AEAD *EVP_aead_null_sha1_ssl3(void) { return &aead_null_sha1_ssl3; } |