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| 1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
| 2 * project 2006. | |
| 3 */ | |
| 4 /* ==================================================================== | |
| 5 * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
| 6 * | |
| 7 * Redistribution and use in source and binary forms, with or without | |
| 8 * modification, are permitted provided that the following conditions | |
| 9 * are met: | |
| 10 * | |
| 11 * 1. Redistributions of source code must retain the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer. | |
| 13 * | |
| 14 * 2. Redistributions in binary form must reproduce the above copyright | |
| 15 * notice, this list of conditions and the following disclaimer in | |
| 16 * the documentation and/or other materials provided with the | |
| 17 * distribution. | |
| 18 * | |
| 19 * 3. All advertising materials mentioning features or use of this | |
| 20 * software must display the following acknowledgment: | |
| 21 * "This product includes software developed by the OpenSSL Project | |
| 22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 23 * | |
| 24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 25 * endorse or promote products derived from this software without | |
| 26 * prior written permission. For written permission, please contact | |
| 27 * licensing@OpenSSL.org. | |
| 28 * | |
| 29 * 5. Products derived from this software may not be called "OpenSSL" | |
| 30 * nor may "OpenSSL" appear in their names without prior written | |
| 31 * permission of the OpenSSL Project. | |
| 32 * | |
| 33 * 6. Redistributions of any form whatsoever must retain the following | |
| 34 * acknowledgment: | |
| 35 * "This product includes software developed by the OpenSSL Project | |
| 36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 37 * | |
| 38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 49 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 50 * ==================================================================== | |
| 51 * | |
| 52 * This product includes cryptographic software written by Eric Young | |
| 53 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 54 * Hudson (tjh@cryptsoft.com). | |
| 55 * | |
| 56 */ | |
| 57 | |
| 58 #include <stdio.h> | |
| 59 #include "cryptlib.h" | |
| 60 #include <openssl/asn1t.h> | |
| 61 #include <openssl/x509.h> | |
| 62 #include <openssl/ec.h> | |
| 63 #include <openssl/ecdsa.h> | |
| 64 #include <openssl/evp.h> | |
| 65 #include "evp_locl.h" | |
| 66 | |
| 67 /* EC pkey context structure */ | |
| 68 | |
| 69 typedef struct | |
| 70 { | |
| 71 /* Key and paramgen group */ | |
| 72 EC_GROUP *gen_group; | |
| 73 /* message digest */ | |
| 74 const EVP_MD *md; | |
| 75 } EC_PKEY_CTX; | |
| 76 | |
| 77 static int pkey_ec_init(EVP_PKEY_CTX *ctx) | |
| 78 { | |
| 79 EC_PKEY_CTX *dctx; | |
| 80 dctx = OPENSSL_malloc(sizeof(EC_PKEY_CTX)); | |
| 81 if (!dctx) | |
| 82 return 0; | |
| 83 dctx->gen_group = NULL; | |
| 84 dctx->md = NULL; | |
| 85 | |
| 86 ctx->data = dctx; | |
| 87 | |
| 88 return 1; | |
| 89 } | |
| 90 | |
| 91 static int pkey_ec_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) | |
| 92 { | |
| 93 EC_PKEY_CTX *dctx, *sctx; | |
| 94 if (!pkey_ec_init(dst)) | |
| 95 return 0; | |
| 96 sctx = src->data; | |
| 97 dctx = dst->data; | |
| 98 if (sctx->gen_group) | |
| 99 { | |
| 100 dctx->gen_group = EC_GROUP_dup(sctx->gen_group); | |
| 101 if (!dctx->gen_group) | |
| 102 return 0; | |
| 103 } | |
| 104 dctx->md = sctx->md; | |
| 105 return 1; | |
| 106 } | |
| 107 | |
| 108 static void pkey_ec_cleanup(EVP_PKEY_CTX *ctx) | |
| 109 { | |
| 110 EC_PKEY_CTX *dctx = ctx->data; | |
| 111 if (dctx) | |
| 112 { | |
| 113 if (dctx->gen_group) | |
| 114 EC_GROUP_free(dctx->gen_group); | |
| 115 OPENSSL_free(dctx); | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 static int pkey_ec_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, | |
| 120 const unsigned char *tbs, size_t tbslen) | |
| 121 { | |
| 122 int ret, type; | |
| 123 unsigned int sltmp; | |
| 124 EC_PKEY_CTX *dctx = ctx->data; | |
| 125 EC_KEY *ec = ctx->pkey->pkey.ec; | |
| 126 | |
| 127 if (!sig) | |
| 128 { | |
| 129 *siglen = ECDSA_size(ec); | |
| 130 return 1; | |
| 131 } | |
| 132 else if(*siglen < (size_t)ECDSA_size(ec)) | |
| 133 { | |
| 134 ECerr(EC_F_PKEY_EC_SIGN, EC_R_BUFFER_TOO_SMALL); | |
| 135 return 0; | |
| 136 } | |
| 137 | |
| 138 if (dctx->md) | |
| 139 type = EVP_MD_type(dctx->md); | |
| 140 else | |
| 141 type = NID_sha1; | |
| 142 | |
| 143 | |
| 144 ret = ECDSA_sign(type, tbs, tbslen, sig, &sltmp, ec); | |
| 145 | |
| 146 if (ret <= 0) | |
| 147 return ret; | |
| 148 *siglen = (size_t)sltmp; | |
| 149 return 1; | |
| 150 } | |
| 151 | |
| 152 static int pkey_ec_verify(EVP_PKEY_CTX *ctx, | |
| 153 const unsigned char *sig, size_t siglen, | |
| 154 const unsigned char *tbs, size_t tbslen) | |
| 155 { | |
| 156 int ret, type; | |
| 157 EC_PKEY_CTX *dctx = ctx->data; | |
| 158 EC_KEY *ec = ctx->pkey->pkey.ec; | |
| 159 | |
| 160 if (dctx->md) | |
| 161 type = EVP_MD_type(dctx->md); | |
| 162 else | |
| 163 type = NID_sha1; | |
| 164 | |
| 165 ret = ECDSA_verify(type, tbs, tbslen, sig, siglen, ec); | |
| 166 | |
| 167 return ret; | |
| 168 } | |
| 169 | |
| 170 static int pkey_ec_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen) | |
| 171 { | |
| 172 int ret; | |
| 173 size_t outlen; | |
| 174 const EC_POINT *pubkey = NULL; | |
| 175 if (!ctx->pkey || !ctx->peerkey) | |
| 176 { | |
| 177 ECerr(EC_F_PKEY_EC_DERIVE, EC_R_KEYS_NOT_SET); | |
| 178 return 0; | |
| 179 } | |
| 180 | |
| 181 if (!key) | |
| 182 { | |
| 183 const EC_GROUP *group; | |
| 184 group = EC_KEY_get0_group(ctx->pkey->pkey.ec); | |
| 185 *keylen = (EC_GROUP_get_degree(group) + 7)/8; | |
| 186 return 1; | |
| 187 } | |
| 188 | |
| 189 pubkey = EC_KEY_get0_public_key(ctx->peerkey->pkey.ec); | |
| 190 | |
| 191 /* NB: unlike PKCS#3 DH, if *outlen is less than maximum size this is | |
| 192 * not an error, the result is truncated. | |
| 193 */ | |
| 194 | |
| 195 outlen = *keylen; | |
| 196 | |
| 197 ret = ECDH_compute_key(key, outlen, pubkey, ctx->pkey->pkey.ec, 0); | |
| 198 if (ret < 0) | |
| 199 return ret; | |
| 200 *keylen = ret; | |
| 201 return 1; | |
| 202 } | |
| 203 | |
| 204 static int pkey_ec_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) | |
| 205 { | |
| 206 EC_PKEY_CTX *dctx = ctx->data; | |
| 207 EC_GROUP *group; | |
| 208 switch (type) | |
| 209 { | |
| 210 case EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID: | |
| 211 group = EC_GROUP_new_by_curve_name(p1); | |
| 212 if (group == NULL) | |
| 213 { | |
| 214 ECerr(EC_F_PKEY_EC_CTRL, EC_R_INVALID_CURVE); | |
| 215 return 0; | |
| 216 } | |
| 217 if (dctx->gen_group) | |
| 218 EC_GROUP_free(dctx->gen_group); | |
| 219 dctx->gen_group = group; | |
| 220 return 1; | |
| 221 | |
| 222 case EVP_PKEY_CTRL_MD: | |
| 223 if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 && | |
| 224 EVP_MD_type((const EVP_MD *)p2) != NID_ecdsa_with_SHA1 && | |
| 225 EVP_MD_type((const EVP_MD *)p2) != NID_sha224 && | |
| 226 EVP_MD_type((const EVP_MD *)p2) != NID_sha256 && | |
| 227 EVP_MD_type((const EVP_MD *)p2) != NID_sha384 && | |
| 228 EVP_MD_type((const EVP_MD *)p2) != NID_sha512) | |
| 229 { | |
| 230 ECerr(EC_F_PKEY_EC_CTRL, EC_R_INVALID_DIGEST_TYPE); | |
| 231 return 0; | |
| 232 } | |
| 233 dctx->md = p2; | |
| 234 return 1; | |
| 235 | |
| 236 case EVP_PKEY_CTRL_PEER_KEY: | |
| 237 /* Default behaviour is OK */ | |
| 238 case EVP_PKEY_CTRL_DIGESTINIT: | |
| 239 case EVP_PKEY_CTRL_PKCS7_SIGN: | |
| 240 case EVP_PKEY_CTRL_CMS_SIGN: | |
| 241 return 1; | |
| 242 | |
| 243 default: | |
| 244 return -2; | |
| 245 | |
| 246 } | |
| 247 } | |
| 248 | |
| 249 static int pkey_ec_ctrl_str(EVP_PKEY_CTX *ctx, | |
| 250 const char *type, const char *value) | |
| 251 { | |
| 252 if (!strcmp(type, "ec_paramgen_curve")) | |
| 253 { | |
| 254 int nid; | |
| 255 nid = OBJ_sn2nid(value); | |
| 256 if (nid == NID_undef) | |
| 257 nid = OBJ_ln2nid(value); | |
| 258 if (nid == NID_undef) | |
| 259 { | |
| 260 ECerr(EC_F_PKEY_EC_CTRL_STR, EC_R_INVALID_CURVE); | |
| 261 return 0; | |
| 262 } | |
| 263 return EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid); | |
| 264 } | |
| 265 return -2; | |
| 266 } | |
| 267 | |
| 268 static int pkey_ec_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) | |
| 269 { | |
| 270 EC_KEY *ec = NULL; | |
| 271 EC_PKEY_CTX *dctx = ctx->data; | |
| 272 int ret = 0; | |
| 273 if (dctx->gen_group == NULL) | |
| 274 { | |
| 275 ECerr(EC_F_PKEY_EC_PARAMGEN, EC_R_NO_PARAMETERS_SET); | |
| 276 return 0; | |
| 277 } | |
| 278 ec = EC_KEY_new(); | |
| 279 if (!ec) | |
| 280 return 0; | |
| 281 ret = EC_KEY_set_group(ec, dctx->gen_group); | |
| 282 if (ret) | |
| 283 EVP_PKEY_assign_EC_KEY(pkey, ec); | |
| 284 else | |
| 285 EC_KEY_free(ec); | |
| 286 return ret; | |
| 287 } | |
| 288 | |
| 289 static int pkey_ec_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) | |
| 290 { | |
| 291 EC_KEY *ec = NULL; | |
| 292 if (ctx->pkey == NULL) | |
| 293 { | |
| 294 ECerr(EC_F_PKEY_EC_KEYGEN, EC_R_NO_PARAMETERS_SET); | |
| 295 return 0; | |
| 296 } | |
| 297 ec = EC_KEY_new(); | |
| 298 if (!ec) | |
| 299 return 0; | |
| 300 EVP_PKEY_assign_EC_KEY(pkey, ec); | |
| 301 /* Note: if error return, pkey is freed by parent routine */ | |
| 302 if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey)) | |
| 303 return 0; | |
| 304 return EC_KEY_generate_key(pkey->pkey.ec); | |
| 305 } | |
| 306 | |
| 307 const EVP_PKEY_METHOD ec_pkey_meth = | |
| 308 { | |
| 309 EVP_PKEY_EC, | |
| 310 0, | |
| 311 pkey_ec_init, | |
| 312 pkey_ec_copy, | |
| 313 pkey_ec_cleanup, | |
| 314 | |
| 315 0, | |
| 316 pkey_ec_paramgen, | |
| 317 | |
| 318 0, | |
| 319 pkey_ec_keygen, | |
| 320 | |
| 321 0, | |
| 322 pkey_ec_sign, | |
| 323 | |
| 324 0, | |
| 325 pkey_ec_verify, | |
| 326 | |
| 327 0,0, | |
| 328 | |
| 329 0,0,0,0, | |
| 330 | |
| 331 0,0, | |
| 332 | |
| 333 0,0, | |
| 334 | |
| 335 0, | |
| 336 pkey_ec_derive, | |
| 337 | |
| 338 pkey_ec_ctrl, | |
| 339 pkey_ec_ctrl_str | |
| 340 | |
| 341 }; | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master