Line data Source code
1 : /* crypto/evp/evp_lib.c */
2 : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 : * All rights reserved.
4 : *
5 : * This package is an SSL implementation written
6 : * by Eric Young (eay@cryptsoft.com).
7 : * The implementation was written so as to conform with Netscapes SSL.
8 : *
9 : * This library is free for commercial and non-commercial use as long as
10 : * the following conditions are aheared to. The following conditions
11 : * apply to all code found in this distribution, be it the RC4, RSA,
12 : * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 : * included with this distribution is covered by the same copyright terms
14 : * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 : *
16 : * Copyright remains Eric Young's, and as such any Copyright notices in
17 : * the code are not to be removed.
18 : * If this package is used in a product, Eric Young should be given attribution
19 : * as the author of the parts of the library used.
20 : * This can be in the form of a textual message at program startup or
21 : * in documentation (online or textual) provided with the package.
22 : *
23 : * Redistribution and use in source and binary forms, with or without
24 : * modification, are permitted provided that the following conditions
25 : * are met:
26 : * 1. Redistributions of source code must retain the copyright
27 : * notice, this list of conditions and the following disclaimer.
28 : * 2. Redistributions in binary form must reproduce the above copyright
29 : * notice, this list of conditions and the following disclaimer in the
30 : * documentation and/or other materials provided with the distribution.
31 : * 3. All advertising materials mentioning features or use of this software
32 : * must display the following acknowledgement:
33 : * "This product includes cryptographic software written by
34 : * Eric Young (eay@cryptsoft.com)"
35 : * The word 'cryptographic' can be left out if the rouines from the library
36 : * being used are not cryptographic related :-).
37 : * 4. If you include any Windows specific code (or a derivative thereof) from
38 : * the apps directory (application code) you must include an acknowledgement:
39 : * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 : *
41 : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 : * SUCH DAMAGE.
52 : *
53 : * The licence and distribution terms for any publically available version or
54 : * derivative of this code cannot be changed. i.e. this code cannot simply be
55 : * copied and put under another distribution licence
56 : * [including the GNU Public Licence.]
57 : */
58 :
59 : #include <stdio.h>
60 : #include "cryptlib.h"
61 : #include <openssl/evp.h>
62 : #include <openssl/objects.h>
63 : #ifdef OPENSSL_FIPS
64 : # include <openssl/fips.h>
65 : # include "evp_locl.h"
66 : #endif
67 :
68 0 : int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
69 : {
70 : int ret;
71 :
72 0 : if (c->cipher->set_asn1_parameters != NULL)
73 0 : ret = c->cipher->set_asn1_parameters(c, type);
74 0 : else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
75 0 : if (EVP_CIPHER_CTX_mode(c) == EVP_CIPH_WRAP_MODE) {
76 0 : ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
77 : ret = 1;
78 : } else
79 0 : ret = EVP_CIPHER_set_asn1_iv(c, type);
80 : } else
81 : ret = -1;
82 0 : return (ret);
83 : }
84 :
85 0 : int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
86 : {
87 : int ret;
88 :
89 0 : if (c->cipher->get_asn1_parameters != NULL)
90 0 : ret = c->cipher->get_asn1_parameters(c, type);
91 0 : else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
92 0 : if (EVP_CIPHER_CTX_mode(c) == EVP_CIPH_WRAP_MODE)
93 : return 1;
94 0 : ret = EVP_CIPHER_get_asn1_iv(c, type);
95 : } else
96 : ret = -1;
97 0 : return (ret);
98 : }
99 :
100 0 : int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
101 : {
102 : int i = 0;
103 : unsigned int l;
104 :
105 0 : if (type != NULL) {
106 0 : l = EVP_CIPHER_CTX_iv_length(c);
107 0 : OPENSSL_assert(l <= sizeof(c->iv));
108 0 : i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
109 0 : if (i != (int)l)
110 : return (-1);
111 0 : else if (i > 0)
112 0 : memcpy(c->iv, c->oiv, l);
113 : }
114 0 : return (i);
115 : }
116 :
117 0 : int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
118 : {
119 : int i = 0;
120 : unsigned int j;
121 :
122 0 : if (type != NULL) {
123 0 : j = EVP_CIPHER_CTX_iv_length(c);
124 0 : OPENSSL_assert(j <= sizeof(c->iv));
125 0 : i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
126 : }
127 0 : return (i);
128 : }
129 :
130 : /* Convert the various cipher NIDs and dummies to a proper OID NID */
131 0 : int EVP_CIPHER_type(const EVP_CIPHER *ctx)
132 : {
133 : int nid;
134 : ASN1_OBJECT *otmp;
135 : nid = EVP_CIPHER_nid(ctx);
136 :
137 0 : switch (nid) {
138 :
139 : case NID_rc2_cbc:
140 : case NID_rc2_64_cbc:
141 : case NID_rc2_40_cbc:
142 :
143 : return NID_rc2_cbc;
144 :
145 : case NID_rc4:
146 : case NID_rc4_40:
147 :
148 0 : return NID_rc4;
149 :
150 : case NID_aes_128_cfb128:
151 : case NID_aes_128_cfb8:
152 : case NID_aes_128_cfb1:
153 :
154 0 : return NID_aes_128_cfb128;
155 :
156 : case NID_aes_192_cfb128:
157 : case NID_aes_192_cfb8:
158 : case NID_aes_192_cfb1:
159 :
160 0 : return NID_aes_192_cfb128;
161 :
162 : case NID_aes_256_cfb128:
163 : case NID_aes_256_cfb8:
164 : case NID_aes_256_cfb1:
165 :
166 0 : return NID_aes_256_cfb128;
167 :
168 : case NID_des_cfb64:
169 : case NID_des_cfb8:
170 : case NID_des_cfb1:
171 :
172 0 : return NID_des_cfb64;
173 :
174 : case NID_des_ede3_cfb64:
175 : case NID_des_ede3_cfb8:
176 : case NID_des_ede3_cfb1:
177 :
178 0 : return NID_des_cfb64;
179 :
180 : default:
181 : /* Check it has an OID and it is valid */
182 0 : otmp = OBJ_nid2obj(nid);
183 0 : if (!otmp || !otmp->data)
184 : nid = NID_undef;
185 0 : ASN1_OBJECT_free(otmp);
186 0 : return nid;
187 : }
188 : }
189 :
190 12340 : int EVP_CIPHER_block_size(const EVP_CIPHER *e)
191 : {
192 12340 : return e->block_size;
193 : }
194 :
195 0 : int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
196 : {
197 0 : return ctx->cipher->block_size;
198 : }
199 :
200 12342 : int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
201 : const unsigned char *in, unsigned int inl)
202 : {
203 12342 : return ctx->cipher->do_cipher(ctx, out, in, inl);
204 : }
205 :
206 12340 : const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
207 : {
208 12340 : return ctx->cipher;
209 : }
210 :
211 49992 : unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
212 : {
213 : #ifdef OPENSSL_FIPS
214 : const EVP_CIPHER *fcipher;
215 : fcipher = evp_get_fips_cipher(cipher);
216 : if (fcipher && fcipher->flags & EVP_CIPH_FLAG_FIPS)
217 : return cipher->flags | EVP_CIPH_FLAG_FIPS;
218 : #endif
219 49992 : return cipher->flags;
220 : }
221 :
222 10402 : unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
223 : {
224 : #ifdef OPENSSL_FIPS
225 : return EVP_CIPHER_flags(ctx->cipher);
226 : #else
227 10402 : return ctx->cipher->flags;
228 : #endif
229 : }
230 :
231 0 : void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
232 : {
233 0 : return ctx->app_data;
234 : }
235 :
236 0 : void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
237 : {
238 0 : ctx->app_data = data;
239 0 : }
240 :
241 737 : int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
242 : {
243 737 : return cipher->iv_len;
244 : }
245 :
246 1835 : int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
247 : {
248 1835 : return ctx->cipher->iv_len;
249 : }
250 :
251 2206 : int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
252 : {
253 2206 : return cipher->key_len;
254 : }
255 :
256 0 : int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
257 : {
258 0 : return ctx->key_len;
259 : }
260 :
261 0 : int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
262 : {
263 0 : return cipher->nid;
264 : }
265 :
266 0 : int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
267 : {
268 0 : return ctx->cipher->nid;
269 : }
270 :
271 12126 : int EVP_MD_block_size(const EVP_MD *md)
272 : {
273 12126 : return md->block_size;
274 : }
275 :
276 1881 : int EVP_MD_type(const EVP_MD *md)
277 : {
278 1881 : return md->type;
279 : }
280 :
281 0 : int EVP_MD_pkey_type(const EVP_MD *md)
282 : {
283 0 : return md->pkey_type;
284 : }
285 :
286 17047 : int EVP_MD_size(const EVP_MD *md)
287 : {
288 17047 : if (!md) {
289 0 : EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
290 0 : return -1;
291 : }
292 17047 : return md->md_size;
293 : }
294 :
295 : #ifdef OPENSSL_FIPS
296 :
297 : const EVP_MD *evp_get_fips_md(const EVP_MD *md)
298 : {
299 : int nid = EVP_MD_type(md);
300 : if (nid == NID_dsa)
301 : return FIPS_evp_dss1();
302 : else if (nid == NID_dsaWithSHA)
303 : return FIPS_evp_dss();
304 : else if (nid == NID_ecdsa_with_SHA1)
305 : return FIPS_evp_ecdsa();
306 : else
307 : return FIPS_get_digestbynid(nid);
308 : }
309 :
310 : const EVP_CIPHER *evp_get_fips_cipher(const EVP_CIPHER *cipher)
311 : {
312 : int nid = cipher->nid;
313 : if (nid == NID_undef)
314 : return FIPS_evp_enc_null();
315 : else
316 : return FIPS_get_cipherbynid(nid);
317 : }
318 :
319 : #endif
320 :
321 0 : unsigned long EVP_MD_flags(const EVP_MD *md)
322 : {
323 : #ifdef OPENSSL_FIPS
324 : const EVP_MD *fmd;
325 : fmd = evp_get_fips_md(md);
326 : if (fmd && fmd->flags & EVP_MD_FLAG_FIPS)
327 : return md->flags | EVP_MD_FLAG_FIPS;
328 : #endif
329 0 : return md->flags;
330 : }
331 :
332 53962 : const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
333 : {
334 53962 : if (!ctx)
335 : return NULL;
336 46935 : return ctx->digest;
337 : }
338 :
339 35591 : void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
340 : {
341 35591 : ctx->flags |= flags;
342 35591 : }
343 :
344 54099 : void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
345 : {
346 54099 : ctx->flags &= ~flags;
347 54099 : }
348 :
349 108541 : int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
350 : {
351 108541 : return (ctx->flags & flags);
352 : }
353 :
354 0 : void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
355 : {
356 0 : ctx->flags |= flags;
357 0 : }
358 :
359 0 : void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
360 : {
361 0 : ctx->flags &= ~flags;
362 0 : }
363 :
364 0 : int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
365 : {
366 0 : return (ctx->flags & flags);
367 : }
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