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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/x509.h> | |
| 61 #include <openssl/asn1.h> | |
| 62 #include <openssl/dh.h> | |
| 63 #include <openssl/bn.h> | |
| 64 #include "asn1_locl.h" | |
| 65 | |
| 66 static void int_dh_free(EVP_PKEY *pkey) | |
| 67 { | |
| 68 DH_free(pkey->pkey.dh); | |
| 69 } | |
| 70 | |
| 71 static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) | |
| 72 { | |
| 73 const unsigned char *p, *pm; | |
| 74 int pklen, pmlen; | |
| 75 int ptype; | |
| 76 void *pval; | |
| 77 ASN1_STRING *pstr; | |
| 78 X509_ALGOR *palg; | |
| 79 ASN1_INTEGER *public_key = NULL; | |
| 80 | |
| 81 DH *dh = NULL; | |
| 82 | |
| 83 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
| 84 return 0; | |
| 85 X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
| 86 | |
| 87 if (ptype != V_ASN1_SEQUENCE) | |
| 88 { | |
| 89 DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); | |
| 90 goto err; | |
| 91 } | |
| 92 | |
| 93 pstr = pval; | |
| 94 pm = pstr->data; | |
| 95 pmlen = pstr->length; | |
| 96 | |
| 97 if (!(dh = d2i_DHparams(NULL, &pm, pmlen))) | |
| 98 { | |
| 99 DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); | |
| 100 goto err; | |
| 101 } | |
| 102 | |
| 103 if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen))) | |
| 104 { | |
| 105 DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); | |
| 106 goto err; | |
| 107 } | |
| 108 | |
| 109 /* We have parameters now set public key */ | |
| 110 if (!(dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) | |
| 111 { | |
| 112 DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); | |
| 113 goto err; | |
| 114 } | |
| 115 | |
| 116 ASN1_INTEGER_free(public_key); | |
| 117 EVP_PKEY_assign_DH(pkey, dh); | |
| 118 return 1; | |
| 119 | |
| 120 err: | |
| 121 if (public_key) | |
| 122 ASN1_INTEGER_free(public_key); | |
| 123 if (dh) | |
| 124 DH_free(dh); | |
| 125 return 0; | |
| 126 | |
| 127 } | |
| 128 | |
| 129 static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) | |
| 130 { | |
| 131 DH *dh; | |
| 132 void *pval = NULL; | |
| 133 int ptype; | |
| 134 unsigned char *penc = NULL; | |
| 135 int penclen; | |
| 136 ASN1_STRING *str; | |
| 137 ASN1_INTEGER *pub_key = NULL; | |
| 138 | |
| 139 dh=pkey->pkey.dh; | |
| 140 | |
| 141 str = ASN1_STRING_new(); | |
| 142 str->length = i2d_DHparams(dh, &str->data); | |
| 143 if (str->length <= 0) | |
| 144 { | |
| 145 DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
| 146 goto err; | |
| 147 } | |
| 148 pval = str; | |
| 149 ptype = V_ASN1_SEQUENCE; | |
| 150 | |
| 151 pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
| 152 if (!pub_key) | |
| 153 goto err; | |
| 154 | |
| 155 penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
| 156 | |
| 157 ASN1_INTEGER_free(pub_key); | |
| 158 | |
| 159 if (penclen <= 0) | |
| 160 { | |
| 161 DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
| 162 goto err; | |
| 163 } | |
| 164 | |
| 165 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DH), | |
| 166 ptype, pval, penc, penclen)) | |
| 167 return 1; | |
| 168 | |
| 169 err: | |
| 170 if (penc) | |
| 171 OPENSSL_free(penc); | |
| 172 if (pval) | |
| 173 ASN1_STRING_free(pval); | |
| 174 | |
| 175 return 0; | |
| 176 } | |
| 177 | |
| 178 | |
| 179 /* PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in | |
| 180 * that the AlgorithmIdentifier contains the paramaters, the private key | |
| 181 * is explcitly included and the pubkey must be recalculated. | |
| 182 */ | |
| 183 | |
| 184 static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) | |
| 185 { | |
| 186 const unsigned char *p, *pm; | |
| 187 int pklen, pmlen; | |
| 188 int ptype; | |
| 189 void *pval; | |
| 190 ASN1_STRING *pstr; | |
| 191 X509_ALGOR *palg; | |
| 192 ASN1_INTEGER *privkey = NULL; | |
| 193 | |
| 194 DH *dh = NULL; | |
| 195 | |
| 196 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
| 197 return 0; | |
| 198 | |
| 199 X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
| 200 | |
| 201 if (ptype != V_ASN1_SEQUENCE) | |
| 202 goto decerr; | |
| 203 | |
| 204 if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen))) | |
| 205 goto decerr; | |
| 206 | |
| 207 | |
| 208 pstr = pval; | |
| 209 pm = pstr->data; | |
| 210 pmlen = pstr->length; | |
| 211 if (!(dh = d2i_DHparams(NULL, &pm, pmlen))) | |
| 212 goto decerr; | |
| 213 /* We have parameters now set private key */ | |
| 214 if (!(dh->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) | |
| 215 { | |
| 216 DHerr(DH_F_DH_PRIV_DECODE,DH_R_BN_ERROR); | |
| 217 goto dherr; | |
| 218 } | |
| 219 /* Calculate public key */ | |
| 220 if (!DH_generate_key(dh)) | |
| 221 goto dherr; | |
| 222 | |
| 223 EVP_PKEY_assign_DH(pkey, dh); | |
| 224 | |
| 225 ASN1_INTEGER_free(privkey); | |
| 226 | |
| 227 return 1; | |
| 228 | |
| 229 decerr: | |
| 230 DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
| 231 dherr: | |
| 232 DH_free(dh); | |
| 233 return 0; | |
| 234 } | |
| 235 | |
| 236 static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
| 237 { | |
| 238 ASN1_STRING *params = NULL; | |
| 239 ASN1_INTEGER *prkey = NULL; | |
| 240 unsigned char *dp = NULL; | |
| 241 int dplen; | |
| 242 | |
| 243 params = ASN1_STRING_new(); | |
| 244 | |
| 245 if (!params) | |
| 246 { | |
| 247 DHerr(DH_F_DH_PRIV_ENCODE,ERR_R_MALLOC_FAILURE); | |
| 248 goto err; | |
| 249 } | |
| 250 | |
| 251 params->length = i2d_DHparams(pkey->pkey.dh, ¶ms->data); | |
| 252 if (params->length <= 0) | |
| 253 { | |
| 254 DHerr(DH_F_DH_PRIV_ENCODE,ERR_R_MALLOC_FAILURE); | |
| 255 goto err; | |
| 256 } | |
| 257 params->type = V_ASN1_SEQUENCE; | |
| 258 | |
| 259 /* Get private key into integer */ | |
| 260 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
| 261 | |
| 262 if (!prkey) | |
| 263 { | |
| 264 DHerr(DH_F_DH_PRIV_ENCODE,DH_R_BN_ERROR); | |
| 265 goto err; | |
| 266 } | |
| 267 | |
| 268 dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
| 269 | |
| 270 ASN1_INTEGER_free(prkey); | |
| 271 | |
| 272 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dhKeyAgreement), 0, | |
| 273 V_ASN1_SEQUENCE, params, dp, dplen)) | |
| 274 goto err; | |
| 275 | |
| 276 return 1; | |
| 277 | |
| 278 err: | |
| 279 if (dp != NULL) | |
| 280 OPENSSL_free(dp); | |
| 281 if (params != NULL) | |
| 282 ASN1_STRING_free(params); | |
| 283 if (prkey != NULL) | |
| 284 ASN1_INTEGER_free(prkey); | |
| 285 return 0; | |
| 286 } | |
| 287 | |
| 288 | |
| 289 static void update_buflen(const BIGNUM *b, size_t *pbuflen) | |
| 290 { | |
| 291 size_t i; | |
| 292 if (!b) | |
| 293 return; | |
| 294 if (*pbuflen < (i = (size_t)BN_num_bytes(b))) | |
| 295 *pbuflen = i; | |
| 296 } | |
| 297 | |
| 298 static int dh_param_decode(EVP_PKEY *pkey, | |
| 299 const unsigned char **pder, int derlen) | |
| 300 { | |
| 301 DH *dh; | |
| 302 if (!(dh = d2i_DHparams(NULL, pder, derlen))) | |
| 303 { | |
| 304 DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); | |
| 305 return 0; | |
| 306 } | |
| 307 EVP_PKEY_assign_DH(pkey, dh); | |
| 308 return 1; | |
| 309 } | |
| 310 | |
| 311 static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
| 312 { | |
| 313 return i2d_DHparams(pkey->pkey.dh, pder); | |
| 314 } | |
| 315 | |
| 316 static int do_dh_print(BIO *bp, const DH *x, int indent, | |
| 317 ASN1_PCTX *ctx, int ptype) | |
| 318 { | |
| 319 unsigned char *m=NULL; | |
| 320 int reason=ERR_R_BUF_LIB,ret=0; | |
| 321 size_t buf_len=0; | |
| 322 | |
| 323 const char *ktype = NULL; | |
| 324 | |
| 325 BIGNUM *priv_key, *pub_key; | |
| 326 | |
| 327 if (ptype == 2) | |
| 328 priv_key = x->priv_key; | |
| 329 else | |
| 330 priv_key = NULL; | |
| 331 | |
| 332 if (ptype > 0) | |
| 333 pub_key = x->pub_key; | |
| 334 else | |
| 335 pub_key = NULL; | |
| 336 | |
| 337 update_buflen(x->p, &buf_len); | |
| 338 | |
| 339 if (buf_len == 0) | |
| 340 { | |
| 341 reason = ERR_R_PASSED_NULL_PARAMETER; | |
| 342 goto err; | |
| 343 } | |
| 344 | |
| 345 update_buflen(x->g, &buf_len); | |
| 346 update_buflen(pub_key, &buf_len); | |
| 347 update_buflen(priv_key, &buf_len); | |
| 348 | |
| 349 if (ptype == 2) | |
| 350 ktype = "PKCS#3 DH Private-Key"; | |
| 351 else if (ptype == 1) | |
| 352 ktype = "PKCS#3 DH Public-Key"; | |
| 353 else | |
| 354 ktype = "PKCS#3 DH Parameters"; | |
| 355 | |
| 356 m= OPENSSL_malloc(buf_len+10); | |
| 357 if (m == NULL) | |
| 358 { | |
| 359 reason=ERR_R_MALLOC_FAILURE; | |
| 360 goto err; | |
| 361 } | |
| 362 | |
| 363 BIO_indent(bp, indent, 128); | |
| 364 if (BIO_printf(bp,"%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0) | |
| 365 goto err; | |
| 366 indent += 4; | |
| 367 | |
| 368 if (!ASN1_bn_print(bp,"private-key:",priv_key,m,indent)) goto err; | |
| 369 if (!ASN1_bn_print(bp,"public-key:",pub_key,m,indent)) goto err; | |
| 370 | |
| 371 if (!ASN1_bn_print(bp,"prime:",x->p,m,indent)) goto err; | |
| 372 if (!ASN1_bn_print(bp,"generator:",x->g,m,indent)) goto err; | |
| 373 if (x->length != 0) | |
| 374 { | |
| 375 BIO_indent(bp, indent, 128); | |
| 376 if (BIO_printf(bp,"recommended-private-length: %d bits\n", | |
| 377 (int)x->length) <= 0) goto err; | |
| 378 } | |
| 379 | |
| 380 | |
| 381 ret=1; | |
| 382 if (0) | |
| 383 { | |
| 384 err: | |
| 385 DHerr(DH_F_DO_DH_PRINT,reason); | |
| 386 } | |
| 387 if (m != NULL) OPENSSL_free(m); | |
| 388 return(ret); | |
| 389 } | |
| 390 | |
| 391 static int int_dh_size(const EVP_PKEY *pkey) | |
| 392 { | |
| 393 return(DH_size(pkey->pkey.dh)); | |
| 394 } | |
| 395 | |
| 396 static int dh_bits(const EVP_PKEY *pkey) | |
| 397 { | |
| 398 return BN_num_bits(pkey->pkey.dh->p); | |
| 399 } | |
| 400 | |
| 401 static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) | |
| 402 { | |
| 403 if ( BN_cmp(a->pkey.dh->p,b->pkey.dh->p) || | |
| 404 BN_cmp(a->pkey.dh->g,b->pkey.dh->g)) | |
| 405 return 0; | |
| 406 else | |
| 407 return 1; | |
| 408 } | |
| 409 | |
| 410 static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
| 411 { | |
| 412 BIGNUM *a; | |
| 413 | |
| 414 if ((a=BN_dup(from->pkey.dh->p)) == NULL) | |
| 415 return 0; | |
| 416 if (to->pkey.dh->p != NULL) | |
| 417 BN_free(to->pkey.dh->p); | |
| 418 to->pkey.dh->p=a; | |
| 419 | |
| 420 if ((a=BN_dup(from->pkey.dh->g)) == NULL) | |
| 421 return 0; | |
| 422 if (to->pkey.dh->g != NULL) | |
| 423 BN_free(to->pkey.dh->g); | |
| 424 to->pkey.dh->g=a; | |
| 425 | |
| 426 return 1; | |
| 427 } | |
| 428 | |
| 429 static int dh_missing_parameters(const EVP_PKEY *a) | |
| 430 { | |
| 431 if (!a->pkey.dh->p || !a->pkey.dh->g) | |
| 432 return 1; | |
| 433 return 0; | |
| 434 } | |
| 435 | |
| 436 static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
| 437 { | |
| 438 if (dh_cmp_parameters(a, b) == 0) | |
| 439 return 0; | |
| 440 if (BN_cmp(b->pkey.dh->pub_key,a->pkey.dh->pub_key) != 0) | |
| 441 return 0; | |
| 442 else | |
| 443 return 1; | |
| 444 } | |
| 445 | |
| 446 static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
| 447 ASN1_PCTX *ctx) | |
| 448 { | |
| 449 return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 0); | |
| 450 } | |
| 451 | |
| 452 static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
| 453 ASN1_PCTX *ctx) | |
| 454 { | |
| 455 return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 1); | |
| 456 } | |
| 457 | |
| 458 static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
| 459 ASN1_PCTX *ctx) | |
| 460 { | |
| 461 return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 2); | |
| 462 } | |
| 463 | |
| 464 int DHparams_print(BIO *bp, const DH *x) | |
| 465 { | |
| 466 return do_dh_print(bp, x, 4, NULL, 0); | |
| 467 } | |
| 468 | |
| 469 const EVP_PKEY_ASN1_METHOD dh_asn1_meth = | |
| 470 { | |
| 471 EVP_PKEY_DH, | |
| 472 EVP_PKEY_DH, | |
| 473 0, | |
| 474 | |
| 475 "DH", | |
| 476 "OpenSSL PKCS#3 DH method", | |
| 477 | |
| 478 dh_pub_decode, | |
| 479 dh_pub_encode, | |
| 480 dh_pub_cmp, | |
| 481 dh_public_print, | |
| 482 | |
| 483 dh_priv_decode, | |
| 484 dh_priv_encode, | |
| 485 dh_private_print, | |
| 486 | |
| 487 int_dh_size, | |
| 488 dh_bits, | |
| 489 | |
| 490 dh_param_decode, | |
| 491 dh_param_encode, | |
| 492 dh_missing_parameters, | |
| 493 dh_copy_parameters, | |
| 494 dh_cmp_parameters, | |
| 495 dh_param_print, | |
| 496 0, | |
| 497 | |
| 498 int_dh_free, | |
| 499 0 | |
| 500 }; | |
| 501 | |
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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