xref: /freebsd/crypto/openssl/crypto/dsa/dsa_pmeth.c (revision 6f9291cea8b06d251243fd47a7234018541832a3)
1*6f9291ceSJung-uk Kim /*
2*6f9291ceSJung-uk Kim  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
3*6f9291ceSJung-uk Kim  * 2006.
41f13597dSJung-uk Kim  */
51f13597dSJung-uk Kim /* ====================================================================
61f13597dSJung-uk Kim  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
71f13597dSJung-uk Kim  *
81f13597dSJung-uk Kim  * Redistribution and use in source and binary forms, with or without
91f13597dSJung-uk Kim  * modification, are permitted provided that the following conditions
101f13597dSJung-uk Kim  * are met:
111f13597dSJung-uk Kim  *
121f13597dSJung-uk Kim  * 1. Redistributions of source code must retain the above copyright
131f13597dSJung-uk Kim  *    notice, this list of conditions and the following disclaimer.
141f13597dSJung-uk Kim  *
151f13597dSJung-uk Kim  * 2. Redistributions in binary form must reproduce the above copyright
161f13597dSJung-uk Kim  *    notice, this list of conditions and the following disclaimer in
171f13597dSJung-uk Kim  *    the documentation and/or other materials provided with the
181f13597dSJung-uk Kim  *    distribution.
191f13597dSJung-uk Kim  *
201f13597dSJung-uk Kim  * 3. All advertising materials mentioning features or use of this
211f13597dSJung-uk Kim  *    software must display the following acknowledgment:
221f13597dSJung-uk Kim  *    "This product includes software developed by the OpenSSL Project
231f13597dSJung-uk Kim  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
241f13597dSJung-uk Kim  *
251f13597dSJung-uk Kim  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
261f13597dSJung-uk Kim  *    endorse or promote products derived from this software without
271f13597dSJung-uk Kim  *    prior written permission. For written permission, please contact
281f13597dSJung-uk Kim  *    licensing@OpenSSL.org.
291f13597dSJung-uk Kim  *
301f13597dSJung-uk Kim  * 5. Products derived from this software may not be called "OpenSSL"
311f13597dSJung-uk Kim  *    nor may "OpenSSL" appear in their names without prior written
321f13597dSJung-uk Kim  *    permission of the OpenSSL Project.
331f13597dSJung-uk Kim  *
341f13597dSJung-uk Kim  * 6. Redistributions of any form whatsoever must retain the following
351f13597dSJung-uk Kim  *    acknowledgment:
361f13597dSJung-uk Kim  *    "This product includes software developed by the OpenSSL Project
371f13597dSJung-uk Kim  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
381f13597dSJung-uk Kim  *
391f13597dSJung-uk Kim  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
401f13597dSJung-uk Kim  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
411f13597dSJung-uk Kim  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
421f13597dSJung-uk Kim  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
431f13597dSJung-uk Kim  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
441f13597dSJung-uk Kim  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
451f13597dSJung-uk Kim  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
461f13597dSJung-uk Kim  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
471f13597dSJung-uk Kim  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
481f13597dSJung-uk Kim  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
491f13597dSJung-uk Kim  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
501f13597dSJung-uk Kim  * OF THE POSSIBILITY OF SUCH DAMAGE.
511f13597dSJung-uk Kim  * ====================================================================
521f13597dSJung-uk Kim  *
531f13597dSJung-uk Kim  * This product includes cryptographic software written by Eric Young
541f13597dSJung-uk Kim  * (eay@cryptsoft.com).  This product includes software written by Tim
551f13597dSJung-uk Kim  * Hudson (tjh@cryptsoft.com).
561f13597dSJung-uk Kim  *
571f13597dSJung-uk Kim  */
581f13597dSJung-uk Kim 
591f13597dSJung-uk Kim #include <stdio.h>
601f13597dSJung-uk Kim #include "cryptlib.h"
611f13597dSJung-uk Kim #include <openssl/asn1t.h>
621f13597dSJung-uk Kim #include <openssl/x509.h>
631f13597dSJung-uk Kim #include <openssl/evp.h>
641f13597dSJung-uk Kim #include <openssl/bn.h>
651f13597dSJung-uk Kim #include "evp_locl.h"
661f13597dSJung-uk Kim #include "dsa_locl.h"
671f13597dSJung-uk Kim 
681f13597dSJung-uk Kim /* DSA pkey context structure */
691f13597dSJung-uk Kim 
70*6f9291ceSJung-uk Kim typedef struct {
711f13597dSJung-uk Kim     /* Parameter gen parameters */
721f13597dSJung-uk Kim     int nbits;                  /* size of p in bits (default: 1024) */
731f13597dSJung-uk Kim     int qbits;                  /* size of q in bits (default: 160) */
741f13597dSJung-uk Kim     const EVP_MD *pmd;          /* MD for parameter generation */
751f13597dSJung-uk Kim     /* Keygen callback info */
761f13597dSJung-uk Kim     int gentmp[2];
771f13597dSJung-uk Kim     /* message digest */
781f13597dSJung-uk Kim     const EVP_MD *md;           /* MD for the signature */
791f13597dSJung-uk Kim } DSA_PKEY_CTX;
801f13597dSJung-uk Kim 
811f13597dSJung-uk Kim static int pkey_dsa_init(EVP_PKEY_CTX *ctx)
821f13597dSJung-uk Kim {
831f13597dSJung-uk Kim     DSA_PKEY_CTX *dctx;
841f13597dSJung-uk Kim     dctx = OPENSSL_malloc(sizeof(DSA_PKEY_CTX));
851f13597dSJung-uk Kim     if (!dctx)
861f13597dSJung-uk Kim         return 0;
871f13597dSJung-uk Kim     dctx->nbits = 1024;
881f13597dSJung-uk Kim     dctx->qbits = 160;
891f13597dSJung-uk Kim     dctx->pmd = NULL;
901f13597dSJung-uk Kim     dctx->md = NULL;
911f13597dSJung-uk Kim 
921f13597dSJung-uk Kim     ctx->data = dctx;
931f13597dSJung-uk Kim     ctx->keygen_info = dctx->gentmp;
941f13597dSJung-uk Kim     ctx->keygen_info_count = 2;
951f13597dSJung-uk Kim 
961f13597dSJung-uk Kim     return 1;
971f13597dSJung-uk Kim }
981f13597dSJung-uk Kim 
991f13597dSJung-uk Kim static int pkey_dsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
1001f13597dSJung-uk Kim {
1011f13597dSJung-uk Kim     DSA_PKEY_CTX *dctx, *sctx;
1021f13597dSJung-uk Kim     if (!pkey_dsa_init(dst))
1031f13597dSJung-uk Kim         return 0;
1041f13597dSJung-uk Kim     sctx = src->data;
1051f13597dSJung-uk Kim     dctx = dst->data;
1061f13597dSJung-uk Kim     dctx->nbits = sctx->nbits;
1071f13597dSJung-uk Kim     dctx->qbits = sctx->qbits;
1081f13597dSJung-uk Kim     dctx->pmd = sctx->pmd;
1091f13597dSJung-uk Kim     dctx->md = sctx->md;
1101f13597dSJung-uk Kim     return 1;
1111f13597dSJung-uk Kim }
1121f13597dSJung-uk Kim 
1131f13597dSJung-uk Kim static void pkey_dsa_cleanup(EVP_PKEY_CTX *ctx)
1141f13597dSJung-uk Kim {
1151f13597dSJung-uk Kim     DSA_PKEY_CTX *dctx = ctx->data;
1161f13597dSJung-uk Kim     if (dctx)
1171f13597dSJung-uk Kim         OPENSSL_free(dctx);
1181f13597dSJung-uk Kim }
1191f13597dSJung-uk Kim 
120*6f9291ceSJung-uk Kim static int pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
121*6f9291ceSJung-uk Kim                          size_t *siglen, const unsigned char *tbs,
122*6f9291ceSJung-uk Kim                          size_t tbslen)
1231f13597dSJung-uk Kim {
1241f13597dSJung-uk Kim     int ret, type;
1251f13597dSJung-uk Kim     unsigned int sltmp;
1261f13597dSJung-uk Kim     DSA_PKEY_CTX *dctx = ctx->data;
1271f13597dSJung-uk Kim     DSA *dsa = ctx->pkey->pkey.dsa;
1281f13597dSJung-uk Kim 
1291f13597dSJung-uk Kim     if (dctx->md)
1301f13597dSJung-uk Kim         type = EVP_MD_type(dctx->md);
1311f13597dSJung-uk Kim     else
1321f13597dSJung-uk Kim         type = NID_sha1;
1331f13597dSJung-uk Kim 
1341f13597dSJung-uk Kim     ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa);
1351f13597dSJung-uk Kim 
1361f13597dSJung-uk Kim     if (ret <= 0)
1371f13597dSJung-uk Kim         return ret;
1381f13597dSJung-uk Kim     *siglen = sltmp;
1391f13597dSJung-uk Kim     return 1;
1401f13597dSJung-uk Kim }
1411f13597dSJung-uk Kim 
1421f13597dSJung-uk Kim static int pkey_dsa_verify(EVP_PKEY_CTX *ctx,
1431f13597dSJung-uk Kim                            const unsigned char *sig, size_t siglen,
1441f13597dSJung-uk Kim                            const unsigned char *tbs, size_t tbslen)
1451f13597dSJung-uk Kim {
1461f13597dSJung-uk Kim     int ret, type;
1471f13597dSJung-uk Kim     DSA_PKEY_CTX *dctx = ctx->data;
1481f13597dSJung-uk Kim     DSA *dsa = ctx->pkey->pkey.dsa;
1491f13597dSJung-uk Kim 
1501f13597dSJung-uk Kim     if (dctx->md)
1511f13597dSJung-uk Kim         type = EVP_MD_type(dctx->md);
1521f13597dSJung-uk Kim     else
1531f13597dSJung-uk Kim         type = NID_sha1;
1541f13597dSJung-uk Kim 
1551f13597dSJung-uk Kim     ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa);
1561f13597dSJung-uk Kim 
1571f13597dSJung-uk Kim     return ret;
1581f13597dSJung-uk Kim }
1591f13597dSJung-uk Kim 
1601f13597dSJung-uk Kim static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
1611f13597dSJung-uk Kim {
1621f13597dSJung-uk Kim     DSA_PKEY_CTX *dctx = ctx->data;
163*6f9291ceSJung-uk Kim     switch (type) {
1641f13597dSJung-uk Kim     case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS:
1651f13597dSJung-uk Kim         if (p1 < 256)
1661f13597dSJung-uk Kim             return -2;
1671f13597dSJung-uk Kim         dctx->nbits = p1;
1681f13597dSJung-uk Kim         return 1;
1691f13597dSJung-uk Kim 
1701f13597dSJung-uk Kim     case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS:
1711f13597dSJung-uk Kim         if (p1 != 160 && p1 != 224 && p1 && p1 != 256)
1721f13597dSJung-uk Kim             return -2;
1731f13597dSJung-uk Kim         dctx->qbits = p1;
1741f13597dSJung-uk Kim         return 1;
1751f13597dSJung-uk Kim 
1761f13597dSJung-uk Kim     case EVP_PKEY_CTRL_DSA_PARAMGEN_MD:
1771f13597dSJung-uk Kim         if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
1781f13597dSJung-uk Kim             EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
179*6f9291ceSJung-uk Kim             EVP_MD_type((const EVP_MD *)p2) != NID_sha256) {
1801f13597dSJung-uk Kim             DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
1811f13597dSJung-uk Kim             return 0;
1821f13597dSJung-uk Kim         }
1831f13597dSJung-uk Kim         dctx->md = p2;
1841f13597dSJung-uk Kim         return 1;
1851f13597dSJung-uk Kim 
1861f13597dSJung-uk Kim     case EVP_PKEY_CTRL_MD:
1871f13597dSJung-uk Kim         if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
1881f13597dSJung-uk Kim             EVP_MD_type((const EVP_MD *)p2) != NID_dsa &&
1891f13597dSJung-uk Kim             EVP_MD_type((const EVP_MD *)p2) != NID_dsaWithSHA &&
1901f13597dSJung-uk Kim             EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
1911f13597dSJung-uk Kim             EVP_MD_type((const EVP_MD *)p2) != NID_sha256 &&
1921f13597dSJung-uk Kim             EVP_MD_type((const EVP_MD *)p2) != NID_sha384 &&
193*6f9291ceSJung-uk Kim             EVP_MD_type((const EVP_MD *)p2) != NID_sha512) {
1941f13597dSJung-uk Kim             DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
1951f13597dSJung-uk Kim             return 0;
1961f13597dSJung-uk Kim         }
1971f13597dSJung-uk Kim         dctx->md = p2;
1981f13597dSJung-uk Kim         return 1;
1991f13597dSJung-uk Kim 
2001f13597dSJung-uk Kim     case EVP_PKEY_CTRL_DIGESTINIT:
2011f13597dSJung-uk Kim     case EVP_PKEY_CTRL_PKCS7_SIGN:
2021f13597dSJung-uk Kim     case EVP_PKEY_CTRL_CMS_SIGN:
2031f13597dSJung-uk Kim         return 1;
2041f13597dSJung-uk Kim 
2051f13597dSJung-uk Kim     case EVP_PKEY_CTRL_PEER_KEY:
2061f13597dSJung-uk Kim         DSAerr(DSA_F_PKEY_DSA_CTRL,
2071f13597dSJung-uk Kim                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
2081f13597dSJung-uk Kim         return -2;
2091f13597dSJung-uk Kim     default:
2101f13597dSJung-uk Kim         return -2;
2111f13597dSJung-uk Kim 
2121f13597dSJung-uk Kim     }
2131f13597dSJung-uk Kim }
2141f13597dSJung-uk Kim 
2151f13597dSJung-uk Kim static int pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx,
2161f13597dSJung-uk Kim                              const char *type, const char *value)
2171f13597dSJung-uk Kim {
218*6f9291ceSJung-uk Kim     if (!strcmp(type, "dsa_paramgen_bits")) {
2191f13597dSJung-uk Kim         int nbits;
2201f13597dSJung-uk Kim         nbits = atoi(value);
2211f13597dSJung-uk Kim         return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits);
2221f13597dSJung-uk Kim     }
223*6f9291ceSJung-uk Kim     if (!strcmp(type, "dsa_paramgen_q_bits")) {
2241f13597dSJung-uk Kim         int qbits = atoi(value);
2251f13597dSJung-uk Kim         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
226*6f9291ceSJung-uk Kim                                  EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS, qbits,
227*6f9291ceSJung-uk Kim                                  NULL);
2281f13597dSJung-uk Kim     }
229*6f9291ceSJung-uk Kim     if (!strcmp(type, "dsa_paramgen_md")) {
2301f13597dSJung-uk Kim         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
2311f13597dSJung-uk Kim                                  EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0,
2321f13597dSJung-uk Kim                                  (void *)EVP_get_digestbyname(value));
2331f13597dSJung-uk Kim     }
2341f13597dSJung-uk Kim     return -2;
2351f13597dSJung-uk Kim }
2361f13597dSJung-uk Kim 
2371f13597dSJung-uk Kim static int pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
2381f13597dSJung-uk Kim {
2391f13597dSJung-uk Kim     DSA *dsa = NULL;
2401f13597dSJung-uk Kim     DSA_PKEY_CTX *dctx = ctx->data;
2411f13597dSJung-uk Kim     BN_GENCB *pcb, cb;
2421f13597dSJung-uk Kim     int ret;
243*6f9291ceSJung-uk Kim     if (ctx->pkey_gencb) {
2441f13597dSJung-uk Kim         pcb = &cb;
2451f13597dSJung-uk Kim         evp_pkey_set_cb_translate(pcb, ctx);
246*6f9291ceSJung-uk Kim     } else
2471f13597dSJung-uk Kim         pcb = NULL;
2481f13597dSJung-uk Kim     dsa = DSA_new();
2491f13597dSJung-uk Kim     if (!dsa)
2501f13597dSJung-uk Kim         return 0;
2511f13597dSJung-uk Kim     ret = dsa_builtin_paramgen(dsa, dctx->nbits, dctx->qbits, dctx->pmd,
2521f13597dSJung-uk Kim                                NULL, 0, NULL, NULL, NULL, pcb);
2531f13597dSJung-uk Kim     if (ret)
2541f13597dSJung-uk Kim         EVP_PKEY_assign_DSA(pkey, dsa);
2551f13597dSJung-uk Kim     else
2561f13597dSJung-uk Kim         DSA_free(dsa);
2571f13597dSJung-uk Kim     return ret;
2581f13597dSJung-uk Kim }
2591f13597dSJung-uk Kim 
2601f13597dSJung-uk Kim static int pkey_dsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
2611f13597dSJung-uk Kim {
2621f13597dSJung-uk Kim     DSA *dsa = NULL;
263*6f9291ceSJung-uk Kim     if (ctx->pkey == NULL) {
2641f13597dSJung-uk Kim         DSAerr(DSA_F_PKEY_DSA_KEYGEN, DSA_R_NO_PARAMETERS_SET);
2651f13597dSJung-uk Kim         return 0;
2661f13597dSJung-uk Kim     }
2671f13597dSJung-uk Kim     dsa = DSA_new();
2681f13597dSJung-uk Kim     if (!dsa)
2691f13597dSJung-uk Kim         return 0;
2701f13597dSJung-uk Kim     EVP_PKEY_assign_DSA(pkey, dsa);
2711f13597dSJung-uk Kim     /* Note: if error return, pkey is freed by parent routine */
2721f13597dSJung-uk Kim     if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
2731f13597dSJung-uk Kim         return 0;
2741f13597dSJung-uk Kim     return DSA_generate_key(pkey->pkey.dsa);
2751f13597dSJung-uk Kim }
2761f13597dSJung-uk Kim 
277*6f9291ceSJung-uk Kim const EVP_PKEY_METHOD dsa_pkey_meth = {
2781f13597dSJung-uk Kim     EVP_PKEY_DSA,
2791f13597dSJung-uk Kim     EVP_PKEY_FLAG_AUTOARGLEN,
2801f13597dSJung-uk Kim     pkey_dsa_init,
2811f13597dSJung-uk Kim     pkey_dsa_copy,
2821f13597dSJung-uk Kim     pkey_dsa_cleanup,
2831f13597dSJung-uk Kim 
2841f13597dSJung-uk Kim     0,
2851f13597dSJung-uk Kim     pkey_dsa_paramgen,
2861f13597dSJung-uk Kim 
2871f13597dSJung-uk Kim     0,
2881f13597dSJung-uk Kim     pkey_dsa_keygen,
2891f13597dSJung-uk Kim 
2901f13597dSJung-uk Kim     0,
2911f13597dSJung-uk Kim     pkey_dsa_sign,
2921f13597dSJung-uk Kim 
2931f13597dSJung-uk Kim     0,
2941f13597dSJung-uk Kim     pkey_dsa_verify,
2951f13597dSJung-uk Kim 
2961f13597dSJung-uk Kim     0, 0,
2971f13597dSJung-uk Kim 
2981f13597dSJung-uk Kim     0, 0, 0, 0,
2991f13597dSJung-uk Kim 
3001f13597dSJung-uk Kim     0, 0,
3011f13597dSJung-uk Kim 
3021f13597dSJung-uk Kim     0, 0,
3031f13597dSJung-uk Kim 
3041f13597dSJung-uk Kim     0, 0,
3051f13597dSJung-uk Kim 
3061f13597dSJung-uk Kim     pkey_dsa_ctrl,
3071f13597dSJung-uk Kim     pkey_dsa_ctrl_str
3081f13597dSJung-uk Kim };
309