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
EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX * c,ASN1_TYPE * type)68 int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
69 {
70 int ret;
71
72 if (c->cipher->set_asn1_parameters != NULL)
73 ret = c->cipher->set_asn1_parameters(c, type);
74 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
75 switch (EVP_CIPHER_CTX_mode(c)) {
76 case EVP_CIPH_WRAP_MODE:
77 if (EVP_CIPHER_CTX_nid(c) == NID_id_smime_alg_CMS3DESwrap)
78 ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
79 ret = 1;
80 break;
81
82 case EVP_CIPH_GCM_MODE:
83 case EVP_CIPH_CCM_MODE:
84 case EVP_CIPH_XTS_MODE:
85 ret = -1;
86 break;
87
88 default:
89 ret = EVP_CIPHER_set_asn1_iv(c, type);
90 }
91 } else
92 ret = -1;
93 return (ret);
94 }
95
EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX * c,ASN1_TYPE * type)96 int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
97 {
98 int ret;
99
100 if (c->cipher->get_asn1_parameters != NULL)
101 ret = c->cipher->get_asn1_parameters(c, type);
102 else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
103 switch (EVP_CIPHER_CTX_mode(c)) {
104
105 case EVP_CIPH_WRAP_MODE:
106 ret = 1;
107 break;
108
109 case EVP_CIPH_GCM_MODE:
110 case EVP_CIPH_CCM_MODE:
111 case EVP_CIPH_XTS_MODE:
112 ret = -1;
113 break;
114
115 default:
116 ret = EVP_CIPHER_get_asn1_iv(c, type);
117 break;
118 }
119 } else
120 ret = -1;
121 return (ret);
122 }
123
EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX * c,ASN1_TYPE * type)124 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
125 {
126 int i = 0;
127 unsigned int l;
128
129 if (type != NULL) {
130 l = EVP_CIPHER_CTX_iv_length(c);
131 OPENSSL_assert(l <= sizeof(c->iv));
132 i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
133 if (i != (int)l)
134 return (-1);
135 else if (i > 0)
136 memcpy(c->iv, c->oiv, l);
137 }
138 return (i);
139 }
140
EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX * c,ASN1_TYPE * type)141 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
142 {
143 int i = 0;
144 unsigned int j;
145
146 if (type != NULL) {
147 j = EVP_CIPHER_CTX_iv_length(c);
148 OPENSSL_assert(j <= sizeof(c->iv));
149 i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
150 }
151 return (i);
152 }
153
154 /* Convert the various cipher NIDs and dummies to a proper OID NID */
EVP_CIPHER_type(const EVP_CIPHER * ctx)155 int EVP_CIPHER_type(const EVP_CIPHER *ctx)
156 {
157 int nid;
158 ASN1_OBJECT *otmp;
159 nid = EVP_CIPHER_nid(ctx);
160
161 switch (nid) {
162
163 case NID_rc2_cbc:
164 case NID_rc2_64_cbc:
165 case NID_rc2_40_cbc:
166
167 return NID_rc2_cbc;
168
169 case NID_rc4:
170 case NID_rc4_40:
171
172 return NID_rc4;
173
174 case NID_aes_128_cfb128:
175 case NID_aes_128_cfb8:
176 case NID_aes_128_cfb1:
177
178 return NID_aes_128_cfb128;
179
180 case NID_aes_192_cfb128:
181 case NID_aes_192_cfb8:
182 case NID_aes_192_cfb1:
183
184 return NID_aes_192_cfb128;
185
186 case NID_aes_256_cfb128:
187 case NID_aes_256_cfb8:
188 case NID_aes_256_cfb1:
189
190 return NID_aes_256_cfb128;
191
192 case NID_des_cfb64:
193 case NID_des_cfb8:
194 case NID_des_cfb1:
195
196 return NID_des_cfb64;
197
198 case NID_des_ede3_cfb64:
199 case NID_des_ede3_cfb8:
200 case NID_des_ede3_cfb1:
201
202 return NID_des_cfb64;
203
204 default:
205 /* Check it has an OID and it is valid */
206 otmp = OBJ_nid2obj(nid);
207 if (!otmp || !otmp->data)
208 nid = NID_undef;
209 ASN1_OBJECT_free(otmp);
210 return nid;
211 }
212 }
213
EVP_CIPHER_block_size(const EVP_CIPHER * e)214 int EVP_CIPHER_block_size(const EVP_CIPHER *e)
215 {
216 return e->block_size;
217 }
218
EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX * ctx)219 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
220 {
221 return ctx->cipher->block_size;
222 }
223
EVP_Cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,unsigned int inl)224 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
225 const unsigned char *in, unsigned int inl)
226 {
227 return ctx->cipher->do_cipher(ctx, out, in, inl);
228 }
229
EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX * ctx)230 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
231 {
232 return ctx->cipher;
233 }
234
EVP_CIPHER_flags(const EVP_CIPHER * cipher)235 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
236 {
237 #ifdef OPENSSL_FIPS
238 const EVP_CIPHER *fcipher;
239 fcipher = evp_get_fips_cipher(cipher);
240 if (fcipher && fcipher->flags & EVP_CIPH_FLAG_FIPS)
241 return cipher->flags | EVP_CIPH_FLAG_FIPS;
242 #endif
243 return cipher->flags;
244 }
245
EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX * ctx)246 unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
247 {
248 #ifdef OPENSSL_FIPS
249 return EVP_CIPHER_flags(ctx->cipher);
250 #else
251 return ctx->cipher->flags;
252 #endif
253 }
254
EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX * ctx)255 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
256 {
257 return ctx->app_data;
258 }
259
EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX * ctx,void * data)260 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
261 {
262 ctx->app_data = data;
263 }
264
EVP_CIPHER_iv_length(const EVP_CIPHER * cipher)265 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
266 {
267 return cipher->iv_len;
268 }
269
EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX * ctx)270 int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
271 {
272 return ctx->cipher->iv_len;
273 }
274
EVP_CIPHER_key_length(const EVP_CIPHER * cipher)275 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
276 {
277 return cipher->key_len;
278 }
279
EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX * ctx)280 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
281 {
282 return ctx->key_len;
283 }
284
EVP_CIPHER_nid(const EVP_CIPHER * cipher)285 int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
286 {
287 return cipher->nid;
288 }
289
EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX * ctx)290 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
291 {
292 return ctx->cipher->nid;
293 }
294
EVP_MD_block_size(const EVP_MD * md)295 int EVP_MD_block_size(const EVP_MD *md)
296 {
297 return md->block_size;
298 }
299
EVP_MD_type(const EVP_MD * md)300 int EVP_MD_type(const EVP_MD *md)
301 {
302 return md->type;
303 }
304
EVP_MD_pkey_type(const EVP_MD * md)305 int EVP_MD_pkey_type(const EVP_MD *md)
306 {
307 return md->pkey_type;
308 }
309
EVP_MD_size(const EVP_MD * md)310 int EVP_MD_size(const EVP_MD *md)
311 {
312 if (!md) {
313 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
314 return -1;
315 }
316 return md->md_size;
317 }
318
319 #ifdef OPENSSL_FIPS
320
evp_get_fips_md(const EVP_MD * md)321 const EVP_MD *evp_get_fips_md(const EVP_MD *md)
322 {
323 int nid = EVP_MD_type(md);
324 if (nid == NID_dsa)
325 return FIPS_evp_dss1();
326 else if (nid == NID_dsaWithSHA)
327 return FIPS_evp_dss();
328 else if (nid == NID_ecdsa_with_SHA1)
329 return FIPS_evp_ecdsa();
330 else
331 return FIPS_get_digestbynid(nid);
332 }
333
evp_get_fips_cipher(const EVP_CIPHER * cipher)334 const EVP_CIPHER *evp_get_fips_cipher(const EVP_CIPHER *cipher)
335 {
336 int nid = cipher->nid;
337 if (nid == NID_undef)
338 return FIPS_evp_enc_null();
339 else
340 return FIPS_get_cipherbynid(nid);
341 }
342
343 #endif
344
EVP_MD_flags(const EVP_MD * md)345 unsigned long EVP_MD_flags(const EVP_MD *md)
346 {
347 #ifdef OPENSSL_FIPS
348 const EVP_MD *fmd;
349 fmd = evp_get_fips_md(md);
350 if (fmd && fmd->flags & EVP_MD_FLAG_FIPS)
351 return md->flags | EVP_MD_FLAG_FIPS;
352 #endif
353 return md->flags;
354 }
355
EVP_MD_CTX_md(const EVP_MD_CTX * ctx)356 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
357 {
358 if (!ctx)
359 return NULL;
360 return ctx->digest;
361 }
362
EVP_MD_CTX_set_flags(EVP_MD_CTX * ctx,int flags)363 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
364 {
365 ctx->flags |= flags;
366 }
367
EVP_MD_CTX_clear_flags(EVP_MD_CTX * ctx,int flags)368 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
369 {
370 ctx->flags &= ~flags;
371 }
372
EVP_MD_CTX_test_flags(const EVP_MD_CTX * ctx,int flags)373 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
374 {
375 return (ctx->flags & flags);
376 }
377
EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX * ctx,int flags)378 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
379 {
380 ctx->flags |= flags;
381 }
382
EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX * ctx,int flags)383 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
384 {
385 ctx->flags &= ~flags;
386 }
387
EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX * ctx,int flags)388 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
389 {
390 return (ctx->flags & flags);
391 }
392