dsa_ameth.c revision 306195
1/* 2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 3 * 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 "cryptlib.h" 61#include <openssl/x509.h> 62#include <openssl/asn1.h> 63#include <openssl/dsa.h> 64#include <openssl/bn.h> 65#ifndef OPENSSL_NO_CMS 66# include <openssl/cms.h> 67#endif 68#include "asn1_locl.h" 69 70static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) 71{ 72 const unsigned char *p, *pm; 73 int pklen, pmlen; 74 int ptype; 75 void *pval; 76 ASN1_STRING *pstr; 77 X509_ALGOR *palg; 78 ASN1_INTEGER *public_key = NULL; 79 80 DSA *dsa = NULL; 81 82 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) 83 return 0; 84 X509_ALGOR_get0(NULL, &ptype, &pval, palg); 85 86 if (ptype == V_ASN1_SEQUENCE) { 87 pstr = pval; 88 pm = pstr->data; 89 pmlen = pstr->length; 90 91 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen))) { 92 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR); 93 goto err; 94 } 95 96 } else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF)) { 97 if (!(dsa = DSA_new())) { 98 DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE); 99 goto err; 100 } 101 } else { 102 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR); 103 goto err; 104 } 105 106 if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, pklen))) { 107 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR); 108 goto err; 109 } 110 111 if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) { 112 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR); 113 goto err; 114 } 115 116 ASN1_INTEGER_free(public_key); 117 EVP_PKEY_assign_DSA(pkey, dsa); 118 return 1; 119 120 err: 121 if (public_key) 122 ASN1_INTEGER_free(public_key); 123 if (dsa) 124 DSA_free(dsa); 125 return 0; 126 127} 128 129static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) 130{ 131 DSA *dsa; 132 int ptype; 133 unsigned char *penc = NULL; 134 int penclen; 135 ASN1_STRING *str = NULL; 136 137 dsa = pkey->pkey.dsa; 138 if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) { 139 str = ASN1_STRING_new(); 140 if (!str) { 141 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE); 142 goto err; 143 } 144 str->length = i2d_DSAparams(dsa, &str->data); 145 if (str->length <= 0) { 146 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE); 147 goto err; 148 } 149 ptype = V_ASN1_SEQUENCE; 150 } else 151 ptype = V_ASN1_UNDEF; 152 153 dsa->write_params = 0; 154 155 penclen = i2d_DSAPublicKey(dsa, &penc); 156 157 if (penclen <= 0) { 158 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE); 159 goto err; 160 } 161 162 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA), 163 ptype, str, penc, penclen)) 164 return 1; 165 166 err: 167 if (penc) 168 OPENSSL_free(penc); 169 if (str) 170 ASN1_STRING_free(str); 171 172 return 0; 173} 174 175/* 176 * In PKCS#8 DSA: you just get a private key integer and parameters in the 177 * AlgorithmIdentifier the pubkey must be recalculated. 178 */ 179 180static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) 181{ 182 const unsigned char *p, *pm; 183 int pklen, pmlen; 184 int ptype; 185 void *pval; 186 ASN1_STRING *pstr; 187 X509_ALGOR *palg; 188 ASN1_INTEGER *privkey = NULL; 189 BN_CTX *ctx = NULL; 190 191 STACK_OF(ASN1_TYPE) *ndsa = NULL; 192 DSA *dsa = NULL; 193 194 int ret = 0; 195 196 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) 197 return 0; 198 X509_ALGOR_get0(NULL, &ptype, &pval, palg); 199 200 /* Check for broken DSA PKCS#8, UGH! */ 201 if (*p == (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) { 202 ASN1_TYPE *t1, *t2; 203 if (!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen))) 204 goto decerr; 205 if (sk_ASN1_TYPE_num(ndsa) != 2) 206 goto decerr; 207 /*- 208 * Handle Two broken types: 209 * SEQUENCE {parameters, priv_key} 210 * SEQUENCE {pub_key, priv_key} 211 */ 212 213 t1 = sk_ASN1_TYPE_value(ndsa, 0); 214 t2 = sk_ASN1_TYPE_value(ndsa, 1); 215 if (t1->type == V_ASN1_SEQUENCE) { 216 p8->broken = PKCS8_EMBEDDED_PARAM; 217 pval = t1->value.ptr; 218 } else if (ptype == V_ASN1_SEQUENCE) 219 p8->broken = PKCS8_NS_DB; 220 else 221 goto decerr; 222 223 if (t2->type != V_ASN1_INTEGER) 224 goto decerr; 225 226 privkey = t2->value.integer; 227 } else { 228 const unsigned char *q = p; 229 if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen))) 230 goto decerr; 231 if (privkey->type == V_ASN1_NEG_INTEGER) { 232 p8->broken = PKCS8_NEG_PRIVKEY; 233 ASN1_STRING_clear_free(privkey); 234 if (!(privkey = d2i_ASN1_UINTEGER(NULL, &q, pklen))) 235 goto decerr; 236 } 237 if (ptype != V_ASN1_SEQUENCE) 238 goto decerr; 239 } 240 241 pstr = pval; 242 pm = pstr->data; 243 pmlen = pstr->length; 244 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen))) 245 goto decerr; 246 /* We have parameters now set private key */ 247 if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) { 248 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR); 249 goto dsaerr; 250 } 251 /* Calculate public key */ 252 if (!(dsa->pub_key = BN_new())) { 253 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE); 254 goto dsaerr; 255 } 256 if (!(ctx = BN_CTX_new())) { 257 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE); 258 goto dsaerr; 259 } 260 261 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) { 262 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR); 263 goto dsaerr; 264 } 265 266 EVP_PKEY_assign_DSA(pkey, dsa); 267 268 ret = 1; 269 goto done; 270 271 decerr: 272 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_DECODE_ERROR); 273 dsaerr: 274 DSA_free(dsa); 275 done: 276 BN_CTX_free(ctx); 277 if (ndsa) 278 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free); 279 else 280 ASN1_STRING_clear_free(privkey); 281 return ret; 282} 283 284static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) 285{ 286 ASN1_STRING *params = NULL; 287 ASN1_INTEGER *prkey = NULL; 288 unsigned char *dp = NULL; 289 int dplen; 290 291 if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key) { 292 DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS); 293 goto err; 294 } 295 296 params = ASN1_STRING_new(); 297 298 if (!params) { 299 DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); 300 goto err; 301 } 302 303 params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data); 304 if (params->length <= 0) { 305 DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); 306 goto err; 307 } 308 params->type = V_ASN1_SEQUENCE; 309 310 /* Get private key into integer */ 311 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL); 312 313 if (!prkey) { 314 DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR); 315 goto err; 316 } 317 318 dplen = i2d_ASN1_INTEGER(prkey, &dp); 319 320 ASN1_STRING_clear_free(prkey); 321 prkey = NULL; 322 323 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0, 324 V_ASN1_SEQUENCE, params, dp, dplen)) 325 goto err; 326 327 return 1; 328 329 err: 330 if (dp != NULL) 331 OPENSSL_free(dp); 332 if (params != NULL) 333 ASN1_STRING_free(params); 334 if (prkey != NULL) 335 ASN1_STRING_clear_free(prkey); 336 return 0; 337} 338 339static int int_dsa_size(const EVP_PKEY *pkey) 340{ 341 return (DSA_size(pkey->pkey.dsa)); 342} 343 344static int dsa_bits(const EVP_PKEY *pkey) 345{ 346 return BN_num_bits(pkey->pkey.dsa->p); 347} 348 349static int dsa_missing_parameters(const EVP_PKEY *pkey) 350{ 351 DSA *dsa; 352 dsa = pkey->pkey.dsa; 353 if (dsa == NULL || dsa->p == NULL || dsa->q == NULL || dsa->g == NULL) 354 return 1; 355 return 0; 356} 357 358static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) 359{ 360 BIGNUM *a; 361 362 if ((a = BN_dup(from->pkey.dsa->p)) == NULL) 363 return 0; 364 if (to->pkey.dsa->p != NULL) 365 BN_free(to->pkey.dsa->p); 366 to->pkey.dsa->p = a; 367 368 if ((a = BN_dup(from->pkey.dsa->q)) == NULL) 369 return 0; 370 if (to->pkey.dsa->q != NULL) 371 BN_free(to->pkey.dsa->q); 372 to->pkey.dsa->q = a; 373 374 if ((a = BN_dup(from->pkey.dsa->g)) == NULL) 375 return 0; 376 if (to->pkey.dsa->g != NULL) 377 BN_free(to->pkey.dsa->g); 378 to->pkey.dsa->g = a; 379 return 1; 380} 381 382static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) 383{ 384 if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) || 385 BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) || 386 BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g)) 387 return 0; 388 else 389 return 1; 390} 391 392static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) 393{ 394 if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0) 395 return 0; 396 else 397 return 1; 398} 399 400static void int_dsa_free(EVP_PKEY *pkey) 401{ 402 DSA_free(pkey->pkey.dsa); 403} 404 405static void update_buflen(const BIGNUM *b, size_t *pbuflen) 406{ 407 size_t i; 408 if (!b) 409 return; 410 if (*pbuflen < (i = (size_t)BN_num_bytes(b))) 411 *pbuflen = i; 412} 413 414static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype) 415{ 416 unsigned char *m = NULL; 417 int ret = 0; 418 size_t buf_len = 0; 419 const char *ktype = NULL; 420 421 const BIGNUM *priv_key, *pub_key; 422 423 if (ptype == 2) 424 priv_key = x->priv_key; 425 else 426 priv_key = NULL; 427 428 if (ptype > 0) 429 pub_key = x->pub_key; 430 else 431 pub_key = NULL; 432 433 if (ptype == 2) 434 ktype = "Private-Key"; 435 else if (ptype == 1) 436 ktype = "Public-Key"; 437 else 438 ktype = "DSA-Parameters"; 439 440 update_buflen(x->p, &buf_len); 441 update_buflen(x->q, &buf_len); 442 update_buflen(x->g, &buf_len); 443 update_buflen(priv_key, &buf_len); 444 update_buflen(pub_key, &buf_len); 445 446 m = (unsigned char *)OPENSSL_malloc(buf_len + 10); 447 if (m == NULL) { 448 DSAerr(DSA_F_DO_DSA_PRINT, ERR_R_MALLOC_FAILURE); 449 goto err; 450 } 451 452 if (priv_key) { 453 if (!BIO_indent(bp, off, 128)) 454 goto err; 455 if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) 456 <= 0) 457 goto err; 458 } 459 460 if (!ASN1_bn_print(bp, "priv:", priv_key, m, off)) 461 goto err; 462 if (!ASN1_bn_print(bp, "pub: ", pub_key, m, off)) 463 goto err; 464 if (!ASN1_bn_print(bp, "P: ", x->p, m, off)) 465 goto err; 466 if (!ASN1_bn_print(bp, "Q: ", x->q, m, off)) 467 goto err; 468 if (!ASN1_bn_print(bp, "G: ", x->g, m, off)) 469 goto err; 470 ret = 1; 471 err: 472 if (m != NULL) 473 OPENSSL_free(m); 474 return (ret); 475} 476 477static int dsa_param_decode(EVP_PKEY *pkey, 478 const unsigned char **pder, int derlen) 479{ 480 DSA *dsa; 481 if (!(dsa = d2i_DSAparams(NULL, pder, derlen))) { 482 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB); 483 return 0; 484 } 485 EVP_PKEY_assign_DSA(pkey, dsa); 486 return 1; 487} 488 489static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder) 490{ 491 return i2d_DSAparams(pkey->pkey.dsa, pder); 492} 493 494static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, 495 ASN1_PCTX *ctx) 496{ 497 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0); 498} 499 500static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, 501 ASN1_PCTX *ctx) 502{ 503 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1); 504} 505 506static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, 507 ASN1_PCTX *ctx) 508{ 509 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2); 510} 511 512static int old_dsa_priv_decode(EVP_PKEY *pkey, 513 const unsigned char **pder, int derlen) 514{ 515 DSA *dsa; 516 if (!(dsa = d2i_DSAPrivateKey(NULL, pder, derlen))) { 517 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB); 518 return 0; 519 } 520 EVP_PKEY_assign_DSA(pkey, dsa); 521 return 1; 522} 523 524static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) 525{ 526 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder); 527} 528 529static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, 530 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx) 531{ 532 DSA_SIG *dsa_sig; 533 const unsigned char *p; 534 if (!sig) { 535 if (BIO_puts(bp, "\n") <= 0) 536 return 0; 537 else 538 return 1; 539 } 540 p = sig->data; 541 dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length); 542 if (dsa_sig) { 543 int rv = 0; 544 size_t buf_len = 0; 545 unsigned char *m = NULL; 546 update_buflen(dsa_sig->r, &buf_len); 547 update_buflen(dsa_sig->s, &buf_len); 548 m = OPENSSL_malloc(buf_len + 10); 549 if (m == NULL) { 550 DSAerr(DSA_F_DSA_SIG_PRINT, ERR_R_MALLOC_FAILURE); 551 goto err; 552 } 553 554 if (BIO_write(bp, "\n", 1) != 1) 555 goto err; 556 557 if (!ASN1_bn_print(bp, "r: ", dsa_sig->r, m, indent)) 558 goto err; 559 if (!ASN1_bn_print(bp, "s: ", dsa_sig->s, m, indent)) 560 goto err; 561 rv = 1; 562 err: 563 if (m) 564 OPENSSL_free(m); 565 DSA_SIG_free(dsa_sig); 566 return rv; 567 } 568 return X509_signature_dump(bp, sig, indent); 569} 570 571static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) 572{ 573 switch (op) { 574 case ASN1_PKEY_CTRL_PKCS7_SIGN: 575 if (arg1 == 0) { 576 int snid, hnid; 577 X509_ALGOR *alg1, *alg2; 578 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2); 579 if (alg1 == NULL || alg1->algorithm == NULL) 580 return -1; 581 hnid = OBJ_obj2nid(alg1->algorithm); 582 if (hnid == NID_undef) 583 return -1; 584 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) 585 return -1; 586 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); 587 } 588 return 1; 589#ifndef OPENSSL_NO_CMS 590 case ASN1_PKEY_CTRL_CMS_SIGN: 591 if (arg1 == 0) { 592 int snid, hnid; 593 X509_ALGOR *alg1, *alg2; 594 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2); 595 if (alg1 == NULL || alg1->algorithm == NULL) 596 return -1; 597 hnid = OBJ_obj2nid(alg1->algorithm); 598 if (hnid == NID_undef) 599 return -1; 600 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) 601 return -1; 602 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); 603 } 604 return 1; 605 606 case ASN1_PKEY_CTRL_CMS_RI_TYPE: 607 *(int *)arg2 = CMS_RECIPINFO_NONE; 608 return 1; 609#endif 610 611 case ASN1_PKEY_CTRL_DEFAULT_MD_NID: 612 *(int *)arg2 = NID_sha256; 613 return 2; 614 615 default: 616 return -2; 617 618 } 619 620} 621 622/* NB these are sorted in pkey_id order, lowest first */ 623 624const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = { 625 626 { 627 EVP_PKEY_DSA2, 628 EVP_PKEY_DSA, 629 ASN1_PKEY_ALIAS}, 630 631 { 632 EVP_PKEY_DSA1, 633 EVP_PKEY_DSA, 634 ASN1_PKEY_ALIAS}, 635 636 { 637 EVP_PKEY_DSA4, 638 EVP_PKEY_DSA, 639 ASN1_PKEY_ALIAS}, 640 641 { 642 EVP_PKEY_DSA3, 643 EVP_PKEY_DSA, 644 ASN1_PKEY_ALIAS}, 645 646 { 647 EVP_PKEY_DSA, 648 EVP_PKEY_DSA, 649 0, 650 651 "DSA", 652 "OpenSSL DSA method", 653 654 dsa_pub_decode, 655 dsa_pub_encode, 656 dsa_pub_cmp, 657 dsa_pub_print, 658 659 dsa_priv_decode, 660 dsa_priv_encode, 661 dsa_priv_print, 662 663 int_dsa_size, 664 dsa_bits, 665 666 dsa_param_decode, 667 dsa_param_encode, 668 dsa_missing_parameters, 669 dsa_copy_parameters, 670 dsa_cmp_parameters, 671 dsa_param_print, 672 dsa_sig_print, 673 674 int_dsa_free, 675 dsa_pkey_ctrl, 676 old_dsa_priv_decode, 677 old_dsa_priv_encode} 678}; 679