Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* pmeth_fn.c */ |
| 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
| 3 | * project 2006. |
| 4 | */ |
| 5 | /* ==================================================================== |
| 6 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in |
| 17 | * the documentation and/or other materials provided with the |
| 18 | * distribution. |
| 19 | * |
| 20 | * 3. All advertising materials mentioning features or use of this |
| 21 | * software must display the following acknowledgment: |
| 22 | * "This product includes software developed by the OpenSSL Project |
| 23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| 24 | * |
| 25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 26 | * endorse or promote products derived from this software without |
| 27 | * prior written permission. For written permission, please contact |
| 28 | * licensing@OpenSSL.org. |
| 29 | * |
| 30 | * 5. Products derived from this software may not be called "OpenSSL" |
| 31 | * nor may "OpenSSL" appear in their names without prior written |
| 32 | * permission of the OpenSSL Project. |
| 33 | * |
| 34 | * 6. Redistributions of any form whatsoever must retain the following |
| 35 | * acknowledgment: |
| 36 | * "This product includes software developed by the OpenSSL Project |
| 37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 38 | * |
| 39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 50 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 51 | * ==================================================================== |
| 52 | * |
| 53 | * This product includes cryptographic software written by Eric Young |
| 54 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 55 | * Hudson (tjh@cryptsoft.com). |
| 56 | * |
| 57 | */ |
| 58 | |
| 59 | #include <stdio.h> |
| 60 | #include <stdlib.h> |
| 61 | #include "cryptlib.h" |
| 62 | #include <openssl/objects.h> |
| 63 | #include <openssl/evp.h> |
| 64 | #include "evp_locl.h" |
| 65 | |
| 66 | #define M_check_autoarg(ctx, arg, arglen, err) \ |
| 67 | if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) \ |
| 68 | { \ |
| 69 | size_t pksize = (size_t)EVP_PKEY_size(ctx->pkey); \ |
| 70 | if (!arg) \ |
| 71 | { \ |
| 72 | *arglen = pksize; \ |
| 73 | return 1; \ |
| 74 | } \ |
| 75 | else if (*arglen < pksize) \ |
| 76 | { \ |
| 77 | EVPerr(err, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/\ |
| 78 | return 0; \ |
| 79 | } \ |
| 80 | } |
| 81 | |
| 82 | int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx) |
| 83 | { |
| 84 | int ret; |
| 85 | if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) |
| 86 | { |
| 87 | EVPerr(EVP_F_EVP_PKEY_SIGN_INIT, |
| 88 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 89 | return -2; |
| 90 | } |
| 91 | ctx->operation = EVP_PKEY_OP_SIGN; |
| 92 | if (!ctx->pmeth->sign_init) |
| 93 | return 1; |
| 94 | ret = ctx->pmeth->sign_init(ctx); |
| 95 | if (ret <= 0) |
| 96 | ctx->operation = EVP_PKEY_OP_UNDEFINED; |
| 97 | return ret; |
| 98 | } |
| 99 | |
| 100 | int EVP_PKEY_sign(EVP_PKEY_CTX *ctx, |
| 101 | unsigned char *sig, size_t *siglen, |
| 102 | const unsigned char *tbs, size_t tbslen) |
| 103 | { |
| 104 | if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) |
| 105 | { |
| 106 | EVPerr(EVP_F_EVP_PKEY_SIGN, |
| 107 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 108 | return -2; |
| 109 | } |
| 110 | if (ctx->operation != EVP_PKEY_OP_SIGN) |
| 111 | { |
| 112 | EVPerr(EVP_F_EVP_PKEY_SIGN, EVP_R_OPERATON_NOT_INITIALIZED); |
| 113 | return -1; |
| 114 | } |
| 115 | M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN) |
| 116 | return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen); |
| 117 | } |
| 118 | |
| 119 | int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx) |
| 120 | { |
| 121 | int ret; |
| 122 | if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) |
| 123 | { |
| 124 | EVPerr(EVP_F_EVP_PKEY_VERIFY_INIT, |
| 125 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 126 | return -2; |
| 127 | } |
| 128 | ctx->operation = EVP_PKEY_OP_VERIFY; |
| 129 | if (!ctx->pmeth->verify_init) |
| 130 | return 1; |
| 131 | ret = ctx->pmeth->verify_init(ctx); |
| 132 | if (ret <= 0) |
| 133 | ctx->operation = EVP_PKEY_OP_UNDEFINED; |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | int EVP_PKEY_verify(EVP_PKEY_CTX *ctx, |
| 138 | const unsigned char *sig, size_t siglen, |
| 139 | const unsigned char *tbs, size_t tbslen) |
| 140 | { |
| 141 | if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) |
| 142 | { |
| 143 | EVPerr(EVP_F_EVP_PKEY_VERIFY, |
| 144 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 145 | return -2; |
| 146 | } |
| 147 | if (ctx->operation != EVP_PKEY_OP_VERIFY) |
| 148 | { |
| 149 | EVPerr(EVP_F_EVP_PKEY_VERIFY, EVP_R_OPERATON_NOT_INITIALIZED); |
| 150 | return -1; |
| 151 | } |
| 152 | return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen); |
| 153 | } |
| 154 | |
| 155 | int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx) |
| 156 | { |
| 157 | int ret; |
| 158 | if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) |
| 159 | { |
| 160 | EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER_INIT, |
| 161 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 162 | return -2; |
| 163 | } |
| 164 | ctx->operation = EVP_PKEY_OP_VERIFYRECOVER; |
| 165 | if (!ctx->pmeth->verify_recover_init) |
| 166 | return 1; |
| 167 | ret = ctx->pmeth->verify_recover_init(ctx); |
| 168 | if (ret <= 0) |
| 169 | ctx->operation = EVP_PKEY_OP_UNDEFINED; |
| 170 | return ret; |
| 171 | } |
| 172 | |
| 173 | int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx, |
| 174 | unsigned char *rout, size_t *routlen, |
| 175 | const unsigned char *sig, size_t siglen) |
| 176 | { |
| 177 | if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) |
| 178 | { |
| 179 | EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER, |
| 180 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 181 | return -2; |
| 182 | } |
| 183 | if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) |
| 184 | { |
| 185 | EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER, EVP_R_OPERATON_NOT_INITIALIZED); |
| 186 | return -1; |
| 187 | } |
| 188 | M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER) |
| 189 | return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen); |
| 190 | } |
| 191 | |
| 192 | int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx) |
| 193 | { |
| 194 | int ret; |
| 195 | if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) |
| 196 | { |
| 197 | EVPerr(EVP_F_EVP_PKEY_ENCRYPT_INIT, |
| 198 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 199 | return -2; |
| 200 | } |
| 201 | ctx->operation = EVP_PKEY_OP_ENCRYPT; |
| 202 | if (!ctx->pmeth->encrypt_init) |
| 203 | return 1; |
| 204 | ret = ctx->pmeth->encrypt_init(ctx); |
| 205 | if (ret <= 0) |
| 206 | ctx->operation = EVP_PKEY_OP_UNDEFINED; |
| 207 | return ret; |
| 208 | } |
| 209 | |
| 210 | int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx, |
| 211 | unsigned char *out, size_t *outlen, |
| 212 | const unsigned char *in, size_t inlen) |
| 213 | { |
| 214 | if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) |
| 215 | { |
| 216 | EVPerr(EVP_F_EVP_PKEY_ENCRYPT, |
| 217 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 218 | return -2; |
| 219 | } |
| 220 | if (ctx->operation != EVP_PKEY_OP_ENCRYPT) |
| 221 | { |
| 222 | EVPerr(EVP_F_EVP_PKEY_ENCRYPT, EVP_R_OPERATON_NOT_INITIALIZED); |
| 223 | return -1; |
| 224 | } |
| 225 | M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_ENCRYPT) |
| 226 | return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen); |
| 227 | } |
| 228 | |
| 229 | int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx) |
| 230 | { |
| 231 | int ret; |
| 232 | if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) |
| 233 | { |
| 234 | EVPerr(EVP_F_EVP_PKEY_DECRYPT_INIT, |
| 235 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 236 | return -2; |
| 237 | } |
| 238 | ctx->operation = EVP_PKEY_OP_DECRYPT; |
| 239 | if (!ctx->pmeth->decrypt_init) |
| 240 | return 1; |
| 241 | ret = ctx->pmeth->decrypt_init(ctx); |
| 242 | if (ret <= 0) |
| 243 | ctx->operation = EVP_PKEY_OP_UNDEFINED; |
| 244 | return ret; |
| 245 | } |
| 246 | |
| 247 | int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx, |
| 248 | unsigned char *out, size_t *outlen, |
| 249 | const unsigned char *in, size_t inlen) |
| 250 | { |
| 251 | if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) |
| 252 | { |
| 253 | EVPerr(EVP_F_EVP_PKEY_DECRYPT, |
| 254 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 255 | return -2; |
| 256 | } |
| 257 | if (ctx->operation != EVP_PKEY_OP_DECRYPT) |
| 258 | { |
| 259 | EVPerr(EVP_F_EVP_PKEY_DECRYPT, EVP_R_OPERATON_NOT_INITIALIZED); |
| 260 | return -1; |
| 261 | } |
| 262 | M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT) |
| 263 | return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen); |
| 264 | } |
| 265 | |
| 266 | |
| 267 | int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx) |
| 268 | { |
| 269 | int ret; |
| 270 | if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) |
| 271 | { |
| 272 | EVPerr(EVP_F_EVP_PKEY_DERIVE_INIT, |
| 273 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 274 | return -2; |
| 275 | } |
| 276 | ctx->operation = EVP_PKEY_OP_DERIVE; |
| 277 | if (!ctx->pmeth->derive_init) |
| 278 | return 1; |
| 279 | ret = ctx->pmeth->derive_init(ctx); |
| 280 | if (ret <= 0) |
| 281 | ctx->operation = EVP_PKEY_OP_UNDEFINED; |
| 282 | return ret; |
| 283 | } |
| 284 | |
| 285 | int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer) |
| 286 | { |
| 287 | int ret; |
| 288 | if (!ctx || !ctx->pmeth || !(ctx->pmeth->derive||ctx->pmeth->encrypt||ctx->pmeth->decrypt) || !ctx->pmeth->ctrl) |
| 289 | { |
| 290 | EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, |
| 291 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 292 | return -2; |
| 293 | } |
| 294 | if (ctx->operation != EVP_PKEY_OP_DERIVE && ctx->operation != EVP_PKEY_OP_ENCRYPT && ctx->operation != EVP_PKEY_OP_DECRYPT) |
| 295 | { |
| 296 | EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, |
| 297 | EVP_R_OPERATON_NOT_INITIALIZED); |
| 298 | return -1; |
| 299 | } |
| 300 | |
| 301 | ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer); |
| 302 | |
| 303 | if (ret <= 0) |
| 304 | return ret; |
| 305 | |
| 306 | if (ret == 2) |
| 307 | return 1; |
| 308 | |
| 309 | if (!ctx->pkey) |
| 310 | { |
| 311 | EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_NO_KEY_SET); |
| 312 | return -1; |
| 313 | } |
| 314 | |
| 315 | if (ctx->pkey->type != peer->type) |
| 316 | { |
| 317 | EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, |
| 318 | EVP_R_DIFFERENT_KEY_TYPES); |
| 319 | return -1; |
| 320 | } |
| 321 | |
| 322 | /* ran@cryptocom.ru: For clarity. The error is if parameters in peer are |
| 323 | * present (!missing) but don't match. EVP_PKEY_cmp_parameters may return |
| 324 | * 1 (match), 0 (don't match) and -2 (comparison is not defined). -1 |
| 325 | * (different key types) is impossible here because it is checked earlier. |
| 326 | * -2 is OK for us here, as well as 1, so we can check for 0 only. */ |
| 327 | if (!EVP_PKEY_missing_parameters(peer) && |
| 328 | !EVP_PKEY_cmp_parameters(ctx->pkey, peer)) |
| 329 | { |
| 330 | EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, |
| 331 | EVP_R_DIFFERENT_PARAMETERS); |
| 332 | return -1; |
| 333 | } |
| 334 | |
| 335 | if (ctx->peerkey) |
| 336 | EVP_PKEY_free(ctx->peerkey); |
| 337 | ctx->peerkey = peer; |
| 338 | |
| 339 | ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer); |
| 340 | |
| 341 | if (ret <= 0) |
| 342 | { |
| 343 | ctx->peerkey = NULL; |
| 344 | return ret; |
| 345 | } |
| 346 | |
| 347 | CRYPTO_add(&peer->references,1,CRYPTO_LOCK_EVP_PKEY); |
| 348 | return 1; |
| 349 | } |
| 350 | |
| 351 | |
| 352 | int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *pkeylen) |
| 353 | { |
| 354 | if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) |
| 355 | { |
| 356 | EVPerr(EVP_F_EVP_PKEY_DERIVE, |
| 357 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
| 358 | return -2; |
| 359 | } |
| 360 | if (ctx->operation != EVP_PKEY_OP_DERIVE) |
| 361 | { |
| 362 | EVPerr(EVP_F_EVP_PKEY_DERIVE, EVP_R_OPERATON_NOT_INITIALIZED); |
| 363 | return -1; |
| 364 | } |
| 365 | M_check_autoarg(ctx, key, pkeylen, EVP_F_EVP_PKEY_DERIVE) |
| 366 | return ctx->pmeth->derive(ctx, key, pkeylen); |
| 367 | } |
| 368 | |