2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
61 #include <openssl/asn1t.h>
62 #include <openssl/x509.h>
63 #include <openssl/evp.h>
64 #include <openssl/bn.h>
65 #include "internal/evp_int.h"
68 /* 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(*dctx
));
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
;
119 static int pkey_dsa_sign(EVP_PKEY_CTX
*ctx
, unsigned char *sig
,
120 size_t *siglen
, const unsigned char *tbs
,
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
;
163 case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS
:
169 case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS
:
170 if (p1
!= 160 && p1
!= 224 && p1
&& p1
!= 256)
175 case EVP_PKEY_CTRL_DSA_PARAMGEN_MD
:
176 if (EVP_MD_type((const EVP_MD
*)p2
) != NID_sha1
&&
177 EVP_MD_type((const EVP_MD
*)p2
) != NID_sha224
&&
178 EVP_MD_type((const EVP_MD
*)p2
) != NID_sha256
) {
179 DSAerr(DSA_F_PKEY_DSA_CTRL
, DSA_R_INVALID_DIGEST_TYPE
);
185 case EVP_PKEY_CTRL_MD
:
186 if (EVP_MD_type((const EVP_MD
*)p2
) != NID_sha1
&&
187 EVP_MD_type((const EVP_MD
*)p2
) != NID_dsa
&&
188 EVP_MD_type((const EVP_MD
*)p2
) != NID_dsaWithSHA
&&
189 EVP_MD_type((const EVP_MD
*)p2
) != NID_sha224
&&
190 EVP_MD_type((const EVP_MD
*)p2
) != NID_sha256
&&
191 EVP_MD_type((const EVP_MD
*)p2
) != NID_sha384
&&
192 EVP_MD_type((const EVP_MD
*)p2
) != NID_sha512
) {
193 DSAerr(DSA_F_PKEY_DSA_CTRL
, DSA_R_INVALID_DIGEST_TYPE
);
199 case EVP_PKEY_CTRL_GET_MD
:
200 *(const EVP_MD
**)p2
= dctx
->md
;
203 case EVP_PKEY_CTRL_DIGESTINIT
:
204 case EVP_PKEY_CTRL_PKCS7_SIGN
:
205 case EVP_PKEY_CTRL_CMS_SIGN
:
208 case EVP_PKEY_CTRL_PEER_KEY
:
209 DSAerr(DSA_F_PKEY_DSA_CTRL
,
210 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE
);
218 static int pkey_dsa_ctrl_str(EVP_PKEY_CTX
*ctx
,
219 const char *type
, const char *value
)
221 if (strcmp(type
, "dsa_paramgen_bits") == 0) {
224 return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx
, nbits
);
226 if (strcmp(type
, "dsa_paramgen_q_bits") == 0) {
227 int qbits
= atoi(value
);
228 return EVP_PKEY_CTX_ctrl(ctx
, EVP_PKEY_DSA
, EVP_PKEY_OP_PARAMGEN
,
229 EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS
, qbits
,
232 if (strcmp(type
, "dsa_paramgen_md") == 0) {
233 return EVP_PKEY_CTX_ctrl(ctx
, EVP_PKEY_DSA
, EVP_PKEY_OP_PARAMGEN
,
234 EVP_PKEY_CTRL_DSA_PARAMGEN_MD
, 0,
235 (void *)EVP_get_digestbyname(value
));
240 static int pkey_dsa_paramgen(EVP_PKEY_CTX
*ctx
, EVP_PKEY
*pkey
)
243 DSA_PKEY_CTX
*dctx
= ctx
->data
;
246 if (ctx
->pkey_gencb
) {
247 pcb
= BN_GENCB_new();
250 evp_pkey_set_cb_translate(pcb
, ctx
);
258 ret
= dsa_builtin_paramgen(dsa
, dctx
->nbits
, dctx
->qbits
, dctx
->pmd
,
259 NULL
, 0, NULL
, NULL
, NULL
, pcb
);
262 EVP_PKEY_assign_DSA(pkey
, dsa
);
268 static int pkey_dsa_keygen(EVP_PKEY_CTX
*ctx
, EVP_PKEY
*pkey
)
271 if (ctx
->pkey
== NULL
) {
272 DSAerr(DSA_F_PKEY_DSA_KEYGEN
, DSA_R_NO_PARAMETERS_SET
);
278 EVP_PKEY_assign_DSA(pkey
, dsa
);
279 /* Note: if error return, pkey is freed by parent routine */
280 if (!EVP_PKEY_copy_parameters(pkey
, ctx
->pkey
))
282 return DSA_generate_key(pkey
->pkey
.dsa
);
285 const EVP_PKEY_METHOD dsa_pkey_meth
= {
287 EVP_PKEY_FLAG_AUTOARGLEN
,