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-rw-r--r--src/lib/libcrypto/evp/evp_enc.c507
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diff --git a/src/lib/libcrypto/evp/evp_enc.c b/src/lib/libcrypto/evp/evp_enc.c
deleted file mode 100644
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1/* crypto/evp/evp_enc.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/engine.h>
64#include "evp_locl.h"
65
66#include <assert.h>
67
68const char *EVP_version="EVP" OPENSSL_VERSION_PTEXT;
69
70void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *ctx)
71 {
72 memset(ctx,0,sizeof(EVP_CIPHER_CTX));
73 /* ctx->cipher=NULL; */
74 }
75
76
77int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
78 const unsigned char *key, const unsigned char *iv, int enc)
79 {
80 if (cipher)
81 EVP_CIPHER_CTX_init(ctx);
82 return EVP_CipherInit_ex(ctx,cipher,NULL,key,iv,enc);
83 }
84
85int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
86 const unsigned char *key, const unsigned char *iv, int enc)
87 {
88 if (enc == -1)
89 enc = ctx->encrypt;
90 else
91 {
92 if (enc)
93 enc = 1;
94 ctx->encrypt = enc;
95 }
96 /* Whether it's nice or not, "Inits" can be used on "Final"'d contexts
97 * so this context may already have an ENGINE! Try to avoid releasing
98 * the previous handle, re-querying for an ENGINE, and having a
99 * reinitialisation, when it may all be unecessary. */
100 if (ctx->engine && ctx->cipher && (!cipher ||
101 (cipher && (cipher->nid == ctx->cipher->nid))))
102 goto skip_to_init;
103 if (cipher)
104 {
105 /* Ensure a context left lying around from last time is cleared
106 * (the previous check attempted to avoid this if the same
107 * ENGINE and EVP_CIPHER could be used). */
108 EVP_CIPHER_CTX_cleanup(ctx);
109
110 /* Restore encrypt field: it is zeroed by cleanup */
111 ctx->encrypt = enc;
112 if(impl)
113 {
114 if (!ENGINE_init(impl))
115 {
116 EVPerr(EVP_F_EVP_CIPHERINIT, EVP_R_INITIALIZATION_ERROR);
117 return 0;
118 }
119 }
120 else
121 /* Ask if an ENGINE is reserved for this job */
122 impl = ENGINE_get_cipher_engine(cipher->nid);
123 if(impl)
124 {
125 /* There's an ENGINE for this job ... (apparently) */
126 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
127 if(!c)
128 {
129 /* One positive side-effect of US's export
130 * control history, is that we should at least
131 * be able to avoid using US mispellings of
132 * "initialisation"? */
133 EVPerr(EVP_F_EVP_CIPHERINIT, EVP_R_INITIALIZATION_ERROR);
134 return 0;
135 }
136 /* We'll use the ENGINE's private cipher definition */
137 cipher = c;
138 /* Store the ENGINE functional reference so we know
139 * 'cipher' came from an ENGINE and we need to release
140 * it when done. */
141 ctx->engine = impl;
142 }
143 else
144 ctx->engine = NULL;
145
146 ctx->cipher=cipher;
147 ctx->cipher_data=OPENSSL_malloc(ctx->cipher->ctx_size);
148 ctx->key_len = cipher->key_len;
149 ctx->flags = 0;
150 if(ctx->cipher->flags & EVP_CIPH_CTRL_INIT)
151 {
152 if(!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL))
153 {
154 EVPerr(EVP_F_EVP_CIPHERINIT, EVP_R_INITIALIZATION_ERROR);
155 return 0;
156 }
157 }
158 }
159 else if(!ctx->cipher)
160 {
161 EVPerr(EVP_F_EVP_CIPHERINIT, EVP_R_NO_CIPHER_SET);
162 return 0;
163 }
164skip_to_init:
165 /* we assume block size is a power of 2 in *cryptUpdate */
166 assert(ctx->cipher->block_size == 1
167 || ctx->cipher->block_size == 8
168 || ctx->cipher->block_size == 16);
169
170 if(!(EVP_CIPHER_CTX_flags(ctx) & EVP_CIPH_CUSTOM_IV)) {
171 switch(EVP_CIPHER_CTX_mode(ctx)) {
172
173 case EVP_CIPH_STREAM_CIPHER:
174 case EVP_CIPH_ECB_MODE:
175 break;
176
177 case EVP_CIPH_CFB_MODE:
178 case EVP_CIPH_OFB_MODE:
179
180 ctx->num = 0;
181
182 case EVP_CIPH_CBC_MODE:
183
184 if(iv) memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
185 memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
186 break;
187
188 default:
189 return 0;
190 break;
191 }
192 }
193
194 if(key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
195 if(!ctx->cipher->init(ctx,key,iv,enc)) return 0;
196 }
197 ctx->buf_len=0;
198 ctx->final_used=0;
199 ctx->block_mask=ctx->cipher->block_size-1;
200 return 1;
201 }
202
203int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
204 const unsigned char *in, int inl)
205 {
206 if (ctx->encrypt)
207 return EVP_EncryptUpdate(ctx,out,outl,in,inl);
208 else return EVP_DecryptUpdate(ctx,out,outl,in,inl);
209 }
210
211int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
212 {
213 if (ctx->encrypt)
214 return EVP_EncryptFinal_ex(ctx,out,outl);
215 else return EVP_DecryptFinal_ex(ctx,out,outl);
216 }
217
218int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
219 {
220 if (ctx->encrypt)
221 return EVP_EncryptFinal(ctx,out,outl);
222 else return EVP_DecryptFinal(ctx,out,outl);
223 }
224
225int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
226 const unsigned char *key, const unsigned char *iv)
227 {
228 return EVP_CipherInit(ctx, cipher, key, iv, 1);
229 }
230
231int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx,const EVP_CIPHER *cipher, ENGINE *impl,
232 const unsigned char *key, const unsigned char *iv)
233 {
234 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
235 }
236
237int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
238 const unsigned char *key, const unsigned char *iv)
239 {
240 return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, 0);
241 }
242
243int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher, ENGINE *impl,
244 const unsigned char *key, const unsigned char *iv)
245 {
246 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
247 }
248
249int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
250 const unsigned char *in, int inl)
251 {
252 int i,j,bl;
253
254 if(ctx->buf_len == 0 && (inl&(ctx->block_mask)) == 0)
255 {
256 if(ctx->cipher->do_cipher(ctx,out,in,inl))
257 {
258 *outl=inl;
259 return 1;
260 }
261 else
262 {
263 *outl=0;
264 return 0;
265 }
266 }
267 i=ctx->buf_len;
268 bl=ctx->cipher->block_size;
269 if (i != 0)
270 {
271 if (i+inl < bl)
272 {
273 memcpy(&(ctx->buf[i]),in,inl);
274 ctx->buf_len+=inl;
275 *outl=0;
276 return 1;
277 }
278 else
279 {
280 j=bl-i;
281 memcpy(&(ctx->buf[i]),in,j);
282 if(!ctx->cipher->do_cipher(ctx,out,ctx->buf,bl)) return 0;
283 inl-=j;
284 in+=j;
285 out+=bl;
286 *outl=bl;
287 }
288 }
289 else
290 *outl = 0;
291 i=inl&(bl-1);
292 inl-=i;
293 if (inl > 0)
294 {
295 if(!ctx->cipher->do_cipher(ctx,out,in,inl)) return 0;
296 *outl+=inl;
297 }
298
299 if (i != 0)
300 memcpy(ctx->buf,&(in[inl]),i);
301 ctx->buf_len=i;
302 return 1;
303 }
304
305int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
306 {
307 int ret;
308 ret = EVP_EncryptFinal_ex(ctx, out, outl);
309 return ret;
310 }
311
312int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
313 {
314 int i,n,b,bl,ret;
315
316 b=ctx->cipher->block_size;
317 if (b == 1)
318 {
319 *outl=0;
320 return 1;
321 }
322 bl=ctx->buf_len;
323 if (ctx->flags & EVP_CIPH_NO_PADDING)
324 {
325 if(bl)
326 {
327 EVPerr(EVP_F_EVP_ENCRYPTFINAL,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
328 return 0;
329 }
330 *outl = 0;
331 return 1;
332 }
333
334 n=b-bl;
335 for (i=bl; i<b; i++)
336 ctx->buf[i]=n;
337 ret=ctx->cipher->do_cipher(ctx,out,ctx->buf,b);
338
339
340 if(ret)
341 *outl=b;
342
343 return ret;
344 }
345
346int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
347 const unsigned char *in, int inl)
348 {
349 int b, fix_len;
350
351 if (inl == 0)
352 {
353 *outl=0;
354 return 1;
355 }
356
357 if (ctx->flags & EVP_CIPH_NO_PADDING)
358 return EVP_EncryptUpdate(ctx, out, outl, in, inl);
359
360 b=ctx->cipher->block_size;
361
362 if(ctx->final_used)
363 {
364 memcpy(out,ctx->final,b);
365 out+=b;
366 fix_len = 1;
367 }
368 else
369 fix_len = 0;
370
371
372 if(!EVP_EncryptUpdate(ctx,out,outl,in,inl))
373 return 0;
374
375 /* if we have 'decrypted' a multiple of block size, make sure
376 * we have a copy of this last block */
377 if (b > 1 && !ctx->buf_len)
378 {
379 *outl-=b;
380 ctx->final_used=1;
381 memcpy(ctx->final,&out[*outl],b);
382 }
383 else
384 ctx->final_used = 0;
385
386 if (fix_len)
387 *outl += b;
388
389 return 1;
390 }
391
392int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
393 {
394 int ret;
395 ret = EVP_DecryptFinal_ex(ctx, out, outl);
396 return ret;
397 }
398
399int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
400 {
401 int i,b;
402 int n;
403
404 *outl=0;
405 b=ctx->cipher->block_size;
406 if (ctx->flags & EVP_CIPH_NO_PADDING)
407 {
408 if(ctx->buf_len)
409 {
410 EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
411 return 0;
412 }
413 *outl = 0;
414 return 1;
415 }
416 if (b > 1)
417 {
418 if (ctx->buf_len || !ctx->final_used)
419 {
420 EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_WRONG_FINAL_BLOCK_LENGTH);
421 return(0);
422 }
423 n=ctx->final[b-1];
424 if (n > b)
425 {
426 EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_BAD_DECRYPT);
427 return(0);
428 }
429 for (i=0; i<n; i++)
430 {
431 if (ctx->final[--b] != n)
432 {
433 EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_BAD_DECRYPT);
434 return(0);
435 }
436 }
437 n=ctx->cipher->block_size-n;
438 for (i=0; i<n; i++)
439 out[i]=ctx->final[i];
440 *outl=n;
441 }
442 else
443 *outl=0;
444 return(1);
445 }
446
447int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
448 {
449 if (c->cipher != NULL)
450 {
451 if(c->cipher->cleanup && !c->cipher->cleanup(c))
452 return 0;
453 /* Zero cipher context data */
454 if (c->cipher_data)
455 memset(c->cipher_data, 0, c->cipher->ctx_size);
456 }
457 if (c->cipher_data)
458 OPENSSL_free(c->cipher_data);
459 if (c->engine)
460 /* The EVP_CIPHER we used belongs to an ENGINE, release the
461 * functional reference we held for this reason. */
462 ENGINE_finish(c->engine);
463 memset(c,0,sizeof(EVP_CIPHER_CTX));
464 return 1;
465 }
466
467int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
468 {
469 if(c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
470 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
471 if(c->key_len == keylen) return 1;
472 if((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH))
473 {
474 c->key_len = keylen;
475 return 1;
476 }
477 EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH,EVP_R_INVALID_KEY_LENGTH);
478 return 0;
479 }
480
481int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
482 {
483 if (pad) ctx->flags &= ~EVP_CIPH_NO_PADDING;
484 else ctx->flags |= EVP_CIPH_NO_PADDING;
485 return 1;
486 }
487
488int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
489{
490 int ret;
491 if(!ctx->cipher) {
492 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
493 return 0;
494 }
495
496 if(!ctx->cipher->ctrl) {
497 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
498 return 0;
499 }
500
501 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
502 if(ret == -1) {
503 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
504 return 0;
505 }
506 return ret;
507}
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