1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 /* ====================================================================
5 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
60 #include <openssl/asn1t.h>
61 #include <openssl/x509.h>
62 #include <openssl/evp.h>
63 #include <openssl/bn.h>
67 /* DSA pkey context structure */
71 /* Parameter gen parameters */
72 int nbits; /* size of p in bits (default: 1024) */
73 int qbits; /* size of q in bits (default: 160) */
74 const EVP_MD *pmd; /* MD for parameter generation */
75 /* Keygen callback info */
78 const EVP_MD *md; /* MD for the signature */
81 static int pkey_dsa_init(EVP_PKEY_CTX *ctx)
84 dctx = OPENSSL_malloc(sizeof(DSA_PKEY_CTX));
93 ctx->keygen_info = dctx->gentmp;
94 ctx->keygen_info_count = 2;
99 static int pkey_dsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
101 DSA_PKEY_CTX *dctx, *sctx;
102 if (!pkey_dsa_init(dst))
106 dctx->nbits = sctx->nbits;
107 dctx->qbits = sctx->qbits;
108 dctx->pmd = sctx->pmd;
113 static void pkey_dsa_cleanup(EVP_PKEY_CTX *ctx)
115 DSA_PKEY_CTX *dctx = ctx->data;
120 static int pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
121 const unsigned char *tbs, size_t tbslen)
125 DSA_PKEY_CTX *dctx = ctx->data;
126 DSA *dsa = ctx->pkey->pkey.dsa;
129 type = EVP_MD_type(dctx->md);
133 ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa);
141 static int pkey_dsa_verify(EVP_PKEY_CTX *ctx,
142 const unsigned char *sig, size_t siglen,
143 const unsigned char *tbs, size_t tbslen)
146 DSA_PKEY_CTX *dctx = ctx->data;
147 DSA *dsa = ctx->pkey->pkey.dsa;
150 type = EVP_MD_type(dctx->md);
154 ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa);
159 static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
161 DSA_PKEY_CTX *dctx = ctx->data;
164 case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS:
170 case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS:
171 if (p1 != 160 && p1 != 224 && p1 && p1 != 256)
176 case EVP_PKEY_CTRL_DSA_PARAMGEN_MD:
177 if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
178 EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
179 EVP_MD_type((const EVP_MD *)p2) != NID_sha256)
181 DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
187 case EVP_PKEY_CTRL_MD:
188 if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
189 EVP_MD_type((const EVP_MD *)p2) != NID_dsa &&
190 EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
191 EVP_MD_type((const EVP_MD *)p2) != NID_sha256)
193 DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
199 case EVP_PKEY_CTRL_DIGESTINIT:
200 case EVP_PKEY_CTRL_PKCS7_SIGN:
201 case EVP_PKEY_CTRL_CMS_SIGN:
204 case EVP_PKEY_CTRL_PEER_KEY:
205 DSAerr(DSA_F_PKEY_DSA_CTRL,
206 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
214 static int pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx,
215 const char *type, const char *value)
217 if (!strcmp(type, "dsa_paramgen_bits"))
221 return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits);
223 if (!strcmp(type, "dsa_paramgen_q_bits"))
225 int qbits = atoi(value);
226 return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
227 EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS, qbits, NULL);
229 if (!strcmp(type, "dsa_paramgen_md"))
231 return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
232 EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0,
233 (void *)EVP_get_digestbyname(value));
238 static int pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
241 DSA_PKEY_CTX *dctx = ctx->data;
247 evp_pkey_set_cb_translate(pcb, ctx);
254 ret = dsa_builtin_paramgen(dsa, dctx->nbits, dctx->qbits, dctx->pmd,
255 NULL, 0, NULL, NULL, pcb);
257 EVP_PKEY_assign_DSA(pkey, dsa);
263 static int pkey_dsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
266 if (ctx->pkey == NULL)
268 DSAerr(DSA_F_PKEY_DSA_KEYGEN, DSA_R_NO_PARAMETERS_SET);
274 EVP_PKEY_assign_DSA(pkey, dsa);
275 /* Note: if error return, pkey is freed by parent routine */
276 if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
278 return DSA_generate_key(pkey->pkey.dsa);
281 const EVP_PKEY_METHOD dsa_pkey_meth =
284 EVP_PKEY_FLAG_AUTOARGLEN,