1 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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>
66 /* DSA pkey context structure */
70 /* Parameter gen parameters */
71 int nbits; /* size of p in bits (default: 1024) */
72 int qbits; /* size of q in bits (default: 160) */
73 const EVP_MD *pmd; /* MD for parameter generation */
74 /* Keygen callback info */
77 const EVP_MD *md; /* MD for the signature */
80 static int pkey_dsa_init(EVP_PKEY_CTX *ctx)
83 dctx = OPENSSL_malloc(sizeof(DSA_PKEY_CTX));
92 ctx->keygen_info = dctx->gentmp;
93 ctx->keygen_info_count = 2;
98 static int pkey_dsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
100 DSA_PKEY_CTX *dctx, *sctx;
101 if (!pkey_dsa_init(dst))
105 dctx->nbits = sctx->nbits;
106 dctx->qbits = sctx->qbits;
107 dctx->pmd = sctx->pmd;
112 static void pkey_dsa_cleanup(EVP_PKEY_CTX *ctx)
114 DSA_PKEY_CTX *dctx = ctx->data;
119 static int pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
120 const unsigned char *tbs, size_t tbslen)
124 DSA_PKEY_CTX *dctx = ctx->data;
125 DSA *dsa = ctx->pkey->pkey.dsa;
128 type = EVP_MD_type(dctx->md);
132 ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa);
140 static int pkey_dsa_verify(EVP_PKEY_CTX *ctx,
141 const unsigned char *sig, size_t siglen,
142 const unsigned char *tbs, size_t tbslen)
145 DSA_PKEY_CTX *dctx = ctx->data;
146 DSA *dsa = ctx->pkey->pkey.dsa;
149 type = EVP_MD_type(dctx->md);
153 ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa);
158 static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
160 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)
180 DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
186 case EVP_PKEY_CTRL_MD:
187 if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
188 EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
189 EVP_MD_type((const EVP_MD *)p2) != NID_sha256)
191 DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
197 case EVP_PKEY_CTRL_PKCS7_SIGN:
200 case EVP_PKEY_CTRL_PEER_KEY:
201 DSAerr(DSA_F_PKEY_DSA_CTRL,
202 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
210 static int pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx,
211 const char *type, const char *value)
213 if (!strcmp(type, "dsa_paramgen_bits"))
217 return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits);
219 if (!strcmp(type, "dsa_paramgen_q_bits"))
221 int qbits = atoi(value);
222 return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
223 EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS, qbits, NULL);
225 if (!strcmp(type, "dsa_paramgen_md"))
227 return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
228 EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0,
229 (void *)EVP_get_digestbyname(value));
234 static int pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
237 DSA_PKEY_CTX *dctx = ctx->data;
243 evp_pkey_set_cb_translate(pcb, ctx);
250 ret = dsa_builtin_paramgen(dsa, dctx->nbits, dctx->qbits, dctx->pmd,
251 NULL, 0, NULL, NULL, pcb);
253 EVP_PKEY_assign_DSA(pkey, dsa);
259 static int pkey_dsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
262 if (ctx->pkey == NULL)
264 DSAerr(DSA_F_PKEY_DSA_KEYGEN, DSA_R_NO_PARAMETERS_SET);
270 EVP_PKEY_assign_DSA(pkey, dsa);
271 /* Note: if error return, pkey is freed by parent routine */
272 if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
274 return DSA_generate_key(pkey->pkey.dsa);
277 const EVP_PKEY_METHOD dsa_pkey_meth =
280 EVP_PKEY_FLAG_AUTOARGLEN,