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authordjm <>2010-10-01 22:59:01 +0000
committerdjm <>2010-10-01 22:59:01 +0000
commitfe047d8b632246cb2db3234a0a4f32e5c318857b (patch)
tree939b752540947d33507b3acc48d76a8bfb7c3dc3 /src/lib/libcrypto/evp/enc_min.c
parent2ea67f4aa254b09ded62e6e14fc893bbe6381579 (diff)
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resolve conflicts, fix local changes
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diff --git a/src/lib/libcrypto/evp/enc_min.c b/src/lib/libcrypto/evp/enc_min.c
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1/* crypto/evp/enc_min.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/err.h>
63#include <openssl/rand.h>
64#ifndef OPENSSL_NO_ENGINE
65#include <openssl/engine.h>
66#endif
67#include "evp_locl.h"
68
69void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
70 {
71#ifdef OPENSSL_FIPS
72 FIPS_selftest_check();
73#endif
74 memset(ctx,0,sizeof(EVP_CIPHER_CTX));
75 /* ctx->cipher=NULL; */
76 }
77
78#ifdef OPENSSL_FIPS
79
80/* The purpose of these is to trap programs that attempt to use non FIPS
81 * algorithms in FIPS mode and ignore the errors.
82 */
83
84static int bad_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
85 const unsigned char *iv, int enc)
86 { FIPS_ERROR_IGNORED("Cipher init"); return 0;}
87
88static int bad_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
89 const unsigned char *in, unsigned int inl)
90 { FIPS_ERROR_IGNORED("Cipher update"); return 0;}
91
92/* NB: no cleanup because it is allowed after failed init */
93
94static int bad_set_asn1(EVP_CIPHER_CTX *ctx, ASN1_TYPE *typ)
95 { FIPS_ERROR_IGNORED("Cipher set_asn1"); return 0;}
96static int bad_get_asn1(EVP_CIPHER_CTX *ctx, ASN1_TYPE *typ)
97 { FIPS_ERROR_IGNORED("Cipher get_asn1"); return 0;}
98static int bad_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
99 { FIPS_ERROR_IGNORED("Cipher ctrl"); return 0;}
100
101static const EVP_CIPHER bad_cipher =
102 {
103 0,
104 0,
105 0,
106 0,
107 0,
108 bad_init,
109 bad_do_cipher,
110 NULL,
111 0,
112 bad_set_asn1,
113 bad_get_asn1,
114 bad_ctrl,
115 NULL
116 };
117
118#endif
119
120#ifndef OPENSSL_NO_ENGINE
121
122#ifdef OPENSSL_FIPS
123
124static int do_engine_null(ENGINE *impl) { return 0;}
125static int do_evp_enc_engine_null(EVP_CIPHER_CTX *ctx,
126 const EVP_CIPHER **pciph, ENGINE *impl)
127 { return 1; }
128
129static int (*do_engine_finish)(ENGINE *impl)
130 = do_engine_null;
131
132static int (*do_evp_enc_engine)
133 (EVP_CIPHER_CTX *ctx, const EVP_CIPHER **pciph, ENGINE *impl)
134 = do_evp_enc_engine_null;
135
136void int_EVP_CIPHER_set_engine_callbacks(
137 int (*eng_ciph_fin)(ENGINE *impl),
138 int (*eng_ciph_evp)
139 (EVP_CIPHER_CTX *ctx, const EVP_CIPHER **pciph, ENGINE *impl))
140 {
141 do_engine_finish = eng_ciph_fin;
142 do_evp_enc_engine = eng_ciph_evp;
143 }
144
145#else
146
147#define do_engine_finish ENGINE_finish
148
149static int do_evp_enc_engine(EVP_CIPHER_CTX *ctx, const EVP_CIPHER **pcipher, ENGINE *impl)
150 {
151 if(impl)
152 {
153 if (!ENGINE_init(impl))
154 {
155 EVPerr(EVP_F_DO_EVP_ENC_ENGINE, EVP_R_INITIALIZATION_ERROR);
156 return 0;
157 }
158 }
159 else
160 /* Ask if an ENGINE is reserved for this job */
161 impl = ENGINE_get_cipher_engine((*pcipher)->nid);
162 if(impl)
163 {
164 /* There's an ENGINE for this job ... (apparently) */
165 const EVP_CIPHER *c = ENGINE_get_cipher(impl, (*pcipher)->nid);
166 if(!c)
167 {
168 /* One positive side-effect of US's export
169 * control history, is that we should at least
170 * be able to avoid using US mispellings of
171 * "initialisation"? */
172 EVPerr(EVP_F_DO_EVP_ENC_ENGINE, EVP_R_INITIALIZATION_ERROR);
173 return 0;
174 }
175 /* We'll use the ENGINE's private cipher definition */
176 *pcipher = c;
177 /* Store the ENGINE functional reference so we know
178 * 'cipher' came from an ENGINE and we need to release
179 * it when done. */
180 ctx->engine = impl;
181 }
182 else
183 ctx->engine = NULL;
184 return 1;
185 }
186
187#endif
188
189#endif
190
191int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
192 const unsigned char *key, const unsigned char *iv, int enc)
193 {
194 if (enc == -1)
195 enc = ctx->encrypt;
196 else
197 {
198 if (enc)
199 enc = 1;
200 ctx->encrypt = enc;
201 }
202#ifdef OPENSSL_FIPS
203 if(FIPS_selftest_failed())
204 {
205 FIPSerr(FIPS_F_EVP_CIPHERINIT_EX,FIPS_R_FIPS_SELFTEST_FAILED);
206 ctx->cipher = &bad_cipher;
207 return 0;
208 }
209#endif
210#ifndef OPENSSL_NO_ENGINE
211 /* Whether it's nice or not, "Inits" can be used on "Final"'d contexts
212 * so this context may already have an ENGINE! Try to avoid releasing
213 * the previous handle, re-querying for an ENGINE, and having a
214 * reinitialisation, when it may all be unecessary. */
215 if (ctx->engine && ctx->cipher && (!cipher ||
216 (cipher && (cipher->nid == ctx->cipher->nid))))
217 goto skip_to_init;
218#endif
219 if (cipher)
220 {
221 /* Ensure a context left lying around from last time is cleared
222 * (the previous check attempted to avoid this if the same
223 * ENGINE and EVP_CIPHER could be used). */
224 EVP_CIPHER_CTX_cleanup(ctx);
225
226 /* Restore encrypt field: it is zeroed by cleanup */
227 ctx->encrypt = enc;
228#ifndef OPENSSL_NO_ENGINE
229 if (!do_evp_enc_engine(ctx, &cipher, impl))
230 return 0;
231#endif
232
233 ctx->cipher=cipher;
234 if (ctx->cipher->ctx_size)
235 {
236 ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
237 if (!ctx->cipher_data)
238 {
239 EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE);
240 return 0;
241 }
242 }
243 else
244 {
245 ctx->cipher_data = NULL;
246 }
247 ctx->key_len = cipher->key_len;
248 ctx->flags = 0;
249 if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT)
250 {
251 if(!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL))
252 {
253 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
254 return 0;
255 }
256 }
257 }
258 else if(!ctx->cipher)
259 {
260 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET);
261 return 0;
262 }
263#ifndef OPENSSL_NO_ENGINE
264skip_to_init:
265#endif
266 /* we assume block size is a power of 2 in *cryptUpdate */
267 OPENSSL_assert(ctx->cipher->block_size == 1
268 || ctx->cipher->block_size == 8
269 || ctx->cipher->block_size == 16);
270
271 if(!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
272 switch(EVP_CIPHER_CTX_mode(ctx)) {
273
274 case EVP_CIPH_STREAM_CIPHER:
275 case EVP_CIPH_ECB_MODE:
276 break;
277
278 case EVP_CIPH_CFB_MODE:
279 case EVP_CIPH_OFB_MODE:
280
281 ctx->num = 0;
282
283 case EVP_CIPH_CBC_MODE:
284
285 OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <=
286 (int)sizeof(ctx->iv));
287 if(iv) memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
288 memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
289 break;
290
291 default:
292 return 0;
293 break;
294 }
295 }
296
297#ifdef OPENSSL_FIPS
298 /* After 'key' is set no further parameters changes are permissible.
299 * So only check for non FIPS enabling at this point.
300 */
301 if (key && FIPS_mode())
302 {
303 if (!(ctx->cipher->flags & EVP_CIPH_FLAG_FIPS)
304 & !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW))
305 {
306 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_DISABLED_FOR_FIPS);
307#if 0
308 ERR_add_error_data(2, "cipher=",
309 EVP_CIPHER_name(ctx->cipher));
310#endif
311 ctx->cipher = &bad_cipher;
312 return 0;
313 }
314 }
315#endif
316
317 if(key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
318 if(!ctx->cipher->init(ctx,key,iv,enc)) return 0;
319 }
320 ctx->buf_len=0;
321 ctx->final_used=0;
322 ctx->block_mask=ctx->cipher->block_size-1;
323 return 1;
324 }
325
326int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
327 {
328 if (c->cipher != NULL)
329 {
330 if(c->cipher->cleanup && !c->cipher->cleanup(c))
331 return 0;
332 /* Cleanse cipher context data */
333 if (c->cipher_data)
334 OPENSSL_cleanse(c->cipher_data, c->cipher->ctx_size);
335 }
336 if (c->cipher_data)
337 OPENSSL_free(c->cipher_data);
338#ifndef OPENSSL_NO_ENGINE
339 if (c->engine)
340 /* The EVP_CIPHER we used belongs to an ENGINE, release the
341 * functional reference we held for this reason. */
342 do_engine_finish(c->engine);
343#endif
344 memset(c,0,sizeof(EVP_CIPHER_CTX));
345 return 1;
346 }
347
348int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl)
349 {
350#ifdef OPENSSL_FIPS
351 FIPS_selftest_check();
352#endif
353 return ctx->cipher->do_cipher(ctx,out,in,inl);
354 }
355
356int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
357{
358 int ret;
359 if(!ctx->cipher) {
360 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
361 return 0;
362 }
363
364 if(!ctx->cipher->ctrl) {
365 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
366 return 0;
367 }
368
369 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
370 if(ret == -1) {
371 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
372 return 0;
373 }
374 return ret;
375}
376
377unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
378 {
379 return ctx->cipher->flags;
380 }
381
382int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
383 {
384 return ctx->cipher->iv_len;
385 }
386
387int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
388 {
389 return cipher->nid;
390 }
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