]>
Commit | Line | Data |
---|---|---|
2e597528 | 1 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
c927df3f DSH |
2 | * project 2006. |
3 | */ | |
4 | /* ==================================================================== | |
5 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * | |
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 | |
17 | * distribution. | |
18 | * | |
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/)" | |
23 | * | |
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. | |
28 | * | |
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. | |
32 | * | |
33 | * 6. Redistributions of any form whatsoever must retain the following | |
34 | * acknowledgment: | |
35 | * "This product includes software developed by the OpenSSL Project | |
36 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
37 | * | |
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 | * ==================================================================== | |
51 | * | |
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). | |
55 | * | |
56 | */ | |
57 | ||
58 | #include <stdio.h> | |
59 | #include "cryptlib.h" | |
60 | #include <openssl/asn1t.h> | |
61 | #include <openssl/x509.h> | |
c927df3f | 62 | #include <openssl/evp.h> |
1e26a8ba | 63 | #include <openssl/bn.h> |
c927df3f | 64 | #include "evp_locl.h" |
357d5de5 | 65 | #include "dsa_locl.h" |
c927df3f DSH |
66 | |
67 | /* DSA pkey context structure */ | |
68 | ||
69 | typedef struct | |
70 | { | |
71 | /* Parameter gen parameters */ | |
357d5de5 NL |
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 */ | |
c927df3f DSH |
75 | /* Keygen callback info */ |
76 | int gentmp[2]; | |
77 | /* message digest */ | |
357d5de5 | 78 | const EVP_MD *md; /* MD for the signature */ |
c927df3f DSH |
79 | } DSA_PKEY_CTX; |
80 | ||
81 | static int pkey_dsa_init(EVP_PKEY_CTX *ctx) | |
82 | { | |
83 | DSA_PKEY_CTX *dctx; | |
84 | dctx = OPENSSL_malloc(sizeof(DSA_PKEY_CTX)); | |
85 | if (!dctx) | |
86 | return 0; | |
87 | dctx->nbits = 1024; | |
357d5de5 NL |
88 | dctx->qbits = 160; |
89 | dctx->pmd = NULL; | |
c927df3f DSH |
90 | dctx->md = NULL; |
91 | ||
92 | ctx->data = dctx; | |
93 | ctx->keygen_info = dctx->gentmp; | |
94 | ctx->keygen_info_count = 2; | |
95 | ||
96 | return 1; | |
97 | } | |
98 | ||
8bdcef40 DSH |
99 | static int pkey_dsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) |
100 | { | |
101 | DSA_PKEY_CTX *dctx, *sctx; | |
102 | if (!pkey_dsa_init(dst)) | |
103 | return 0; | |
104 | sctx = src->data; | |
105 | dctx = dst->data; | |
106 | dctx->nbits = sctx->nbits; | |
357d5de5 NL |
107 | dctx->qbits = sctx->qbits; |
108 | dctx->pmd = sctx->pmd; | |
109 | dctx->md = sctx->md; | |
8bdcef40 DSH |
110 | return 1; |
111 | } | |
112 | ||
c927df3f DSH |
113 | static void pkey_dsa_cleanup(EVP_PKEY_CTX *ctx) |
114 | { | |
115 | DSA_PKEY_CTX *dctx = ctx->data; | |
116 | if (dctx) | |
117 | OPENSSL_free(dctx); | |
118 | } | |
119 | ||
eaff5a14 DSH |
120 | static int pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, |
121 | const unsigned char *tbs, size_t tbslen) | |
c927df3f DSH |
122 | { |
123 | int ret, type; | |
124 | unsigned int sltmp; | |
125 | DSA_PKEY_CTX *dctx = ctx->data; | |
126 | DSA *dsa = ctx->pkey->pkey.dsa; | |
127 | ||
128 | if (dctx->md) | |
129 | type = EVP_MD_type(dctx->md); | |
130 | else | |
131 | type = NID_sha1; | |
132 | ||
133 | ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa); | |
134 | ||
135 | if (ret < 0) | |
136 | return ret; | |
137 | *siglen = sltmp; | |
138 | return 1; | |
139 | } | |
140 | ||
141 | static int pkey_dsa_verify(EVP_PKEY_CTX *ctx, | |
eaff5a14 DSH |
142 | const unsigned char *sig, size_t siglen, |
143 | const unsigned char *tbs, size_t tbslen) | |
c927df3f DSH |
144 | { |
145 | int ret, type; | |
146 | DSA_PKEY_CTX *dctx = ctx->data; | |
147 | DSA *dsa = ctx->pkey->pkey.dsa; | |
148 | ||
149 | if (dctx->md) | |
150 | type = EVP_MD_type(dctx->md); | |
151 | else | |
152 | type = NID_sha1; | |
153 | ||
154 | ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa); | |
155 | ||
156 | return ret; | |
157 | } | |
158 | ||
159 | static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) | |
160 | { | |
161 | DSA_PKEY_CTX *dctx = ctx->data; | |
162 | switch (type) | |
163 | { | |
164 | case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS: | |
165 | if (p1 < 256) | |
166 | return -2; | |
167 | dctx->nbits = p1; | |
168 | return 1; | |
169 | ||
357d5de5 NL |
170 | case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS: |
171 | if (p1 != 160 && p1 != 224 && p1 && p1 != 256) | |
172 | return -2; | |
173 | dctx->qbits = p1; | |
174 | return 1; | |
175 | ||
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) | |
180 | { | |
181 | DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE); | |
182 | return 0; | |
183 | } | |
184 | dctx->md = p2; | |
185 | return 1; | |
186 | ||
c927df3f | 187 | case EVP_PKEY_CTRL_MD: |
357d5de5 NL |
188 | if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 && |
189 | EVP_MD_type((const EVP_MD *)p2) != NID_sha224 && | |
190 | EVP_MD_type((const EVP_MD *)p2) != NID_sha256) | |
c927df3f DSH |
191 | { |
192 | DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE); | |
193 | return 0; | |
194 | } | |
195 | dctx->md = p2; | |
196 | return 1; | |
197 | ||
156ee882 | 198 | case EVP_PKEY_CTRL_DIGESTINIT: |
b7683e3a | 199 | case EVP_PKEY_CTRL_PKCS7_SIGN: |
8931b30d | 200 | case EVP_PKEY_CTRL_CMS_SIGN: |
b7683e3a | 201 | return 1; |
0e1dba93 DSH |
202 | |
203 | case EVP_PKEY_CTRL_PEER_KEY: | |
204 | DSAerr(DSA_F_PKEY_DSA_CTRL, | |
205 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); | |
206 | return -2; | |
c927df3f DSH |
207 | default: |
208 | return -2; | |
209 | ||
210 | } | |
211 | } | |
212 | ||
213 | static int pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx, | |
214 | const char *type, const char *value) | |
215 | { | |
216 | if (!strcmp(type, "dsa_paramgen_bits")) | |
217 | { | |
218 | int nbits; | |
219 | nbits = atoi(value); | |
220 | return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits); | |
221 | } | |
357d5de5 NL |
222 | if (!strcmp(type, "dsa_paramgen_q_bits")) |
223 | { | |
224 | int qbits = atoi(value); | |
225 | return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, | |
226 | EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS, qbits, NULL); | |
227 | } | |
228 | if (!strcmp(type, "dsa_paramgen_md")) | |
229 | { | |
230 | return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, | |
231 | EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0, | |
232 | (void *)EVP_get_digestbyname(value)); | |
233 | } | |
c927df3f DSH |
234 | return -2; |
235 | } | |
236 | ||
237 | static int pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) | |
238 | { | |
239 | DSA *dsa = NULL; | |
240 | DSA_PKEY_CTX *dctx = ctx->data; | |
241 | BN_GENCB *pcb, cb; | |
242 | int ret; | |
243 | if (ctx->pkey_gencb) | |
244 | { | |
245 | pcb = &cb; | |
246 | evp_pkey_set_cb_translate(pcb, ctx); | |
247 | } | |
248 | else | |
249 | pcb = NULL; | |
250 | dsa = DSA_new(); | |
251 | if (!dsa) | |
252 | return 0; | |
357d5de5 NL |
253 | ret = dsa_builtin_paramgen(dsa, dctx->nbits, dctx->qbits, dctx->pmd, |
254 | NULL, 0, NULL, NULL, pcb); | |
c927df3f DSH |
255 | if (ret) |
256 | EVP_PKEY_assign_DSA(pkey, dsa); | |
257 | else | |
258 | DSA_free(dsa); | |
259 | return ret; | |
260 | } | |
261 | ||
75ef7188 DSH |
262 | static int pkey_dsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) |
263 | { | |
264 | DSA *dsa = NULL; | |
265 | if (ctx->pkey == NULL) | |
266 | { | |
267 | DSAerr(DSA_F_PKEY_DSA_KEYGEN, DSA_R_NO_PARAMETERS_SET); | |
268 | return 0; | |
269 | } | |
270 | dsa = DSA_new(); | |
271 | if (!dsa) | |
272 | return 0; | |
273 | EVP_PKEY_assign_DSA(pkey, dsa); | |
274 | /* Note: if error return, pkey is freed by parent routine */ | |
275 | if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey)) | |
276 | return 0; | |
277 | return DSA_generate_key(pkey->pkey.dsa); | |
278 | } | |
279 | ||
c927df3f DSH |
280 | const EVP_PKEY_METHOD dsa_pkey_meth = |
281 | { | |
282 | EVP_PKEY_DSA, | |
b010b7c4 | 283 | EVP_PKEY_FLAG_AUTOARGLEN, |
c927df3f | 284 | pkey_dsa_init, |
8bdcef40 | 285 | pkey_dsa_copy, |
c927df3f DSH |
286 | pkey_dsa_cleanup, |
287 | ||
288 | 0, | |
289 | pkey_dsa_paramgen, | |
290 | ||
75ef7188 DSH |
291 | 0, |
292 | pkey_dsa_keygen, | |
c927df3f DSH |
293 | |
294 | 0, | |
295 | pkey_dsa_sign, | |
296 | ||
297 | 0, | |
298 | pkey_dsa_verify, | |
299 | ||
300 | 0,0, | |
301 | ||
302 | 0,0,0,0, | |
303 | ||
304 | 0,0, | |
305 | ||
306 | 0,0, | |
307 | ||
d87e6152 DSH |
308 | 0,0, |
309 | ||
c927df3f DSH |
310 | pkey_dsa_ctrl, |
311 | pkey_dsa_ctrl_str | |
312 | ||
313 | ||
314 | }; |