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-rw-r--r--src/lib/libcrypto/modes/cts128.c465
1 files changed, 0 insertions, 465 deletions
diff --git a/src/lib/libcrypto/modes/cts128.c b/src/lib/libcrypto/modes/cts128.c
deleted file mode 100644
index c0e1f3696c..0000000000
--- a/src/lib/libcrypto/modes/cts128.c
+++ /dev/null
@@ -1,465 +0,0 @@
1/* ====================================================================
2 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
3 *
4 * Rights for redistribution and usage in source and binary
5 * forms are granted according to the OpenSSL license.
6 */
7
8#include <openssl/crypto.h>
9#include "modes_lcl.h"
10#include <string.h>
11
12#ifndef MODES_DEBUG
13# ifndef NDEBUG
14# define NDEBUG
15# endif
16#endif
17#include <assert.h>
18
19/*
20 * Trouble with Ciphertext Stealing, CTS, mode is that there is no
21 * common official specification, but couple of cipher/application
22 * specific ones: RFC2040 and RFC3962. Then there is 'Proposal to
23 * Extend CBC Mode By "Ciphertext Stealing"' at NIST site, which
24 * deviates from mentioned RFCs. Most notably it allows input to be
25 * of block length and it doesn't flip the order of the last two
26 * blocks. CTS is being discussed even in ECB context, but it's not
27 * adopted for any known application. This implementation provides
28 * two interfaces: one compliant with above mentioned RFCs and one
29 * compliant with the NIST proposal, both extending CBC mode.
30 */
31
32size_t CRYPTO_cts128_encrypt_block(const unsigned char *in, unsigned char *out,
33 size_t len, const void *key,
34 unsigned char ivec[16], block128_f block)
35{ size_t residue, n;
36
37 assert (in && out && key && ivec);
38
39 if (len <= 16) return 0;
40
41 if ((residue=len%16) == 0) residue = 16;
42
43 len -= residue;
44
45 CRYPTO_cbc128_encrypt(in,out,len,key,ivec,block);
46
47 in += len;
48 out += len;
49
50 for (n=0; n<residue; ++n)
51 ivec[n] ^= in[n];
52 (*block)(ivec,ivec,key);
53 memcpy(out,out-16,residue);
54 memcpy(out-16,ivec,16);
55
56 return len+residue;
57}
58
59size_t CRYPTO_nistcts128_encrypt_block(const unsigned char *in, unsigned char *out,
60 size_t len, const void *key,
61 unsigned char ivec[16], block128_f block)
62{ size_t residue, n;
63
64 assert (in && out && key && ivec);
65
66 if (len < 16) return 0;
67
68 residue=len%16;
69
70 len -= residue;
71
72 CRYPTO_cbc128_encrypt(in,out,len,key,ivec,block);
73
74 if (residue==0) return len;
75
76 in += len;
77 out += len;
78
79 for (n=0; n<residue; ++n)
80 ivec[n] ^= in[n];
81 (*block)(ivec,ivec,key);
82 memcpy(out-16+residue,ivec,16);
83
84 return len+residue;
85}
86
87size_t CRYPTO_cts128_encrypt(const unsigned char *in, unsigned char *out,
88 size_t len, const void *key,
89 unsigned char ivec[16], cbc128_f cbc)
90{ size_t residue;
91 union { size_t align; unsigned char c[16]; } tmp;
92
93 assert (in && out && key && ivec);
94
95 if (len <= 16) return 0;
96
97 if ((residue=len%16) == 0) residue = 16;
98
99 len -= residue;
100
101 (*cbc)(in,out,len,key,ivec,1);
102
103 in += len;
104 out += len;
105
106#if defined(CBC_HANDLES_TRUNCATED_IO)
107 memcpy(tmp.c,out-16,16);
108 (*cbc)(in,out-16,residue,key,ivec,1);
109 memcpy(out,tmp.c,residue);
110#else
111 {
112 size_t n;
113 for (n=0; n<16; n+=sizeof(size_t))
114 *(size_t *)(tmp.c+n) = 0;
115 memcpy(tmp.c,in,residue);
116 }
117 memcpy(out,out-16,residue);
118 (*cbc)(tmp.c,out-16,16,key,ivec,1);
119#endif
120 return len+residue;
121}
122
123size_t CRYPTO_nistcts128_encrypt(const unsigned char *in, unsigned char *out,
124 size_t len, const void *key,
125 unsigned char ivec[16], cbc128_f cbc)
126{ size_t residue;
127 union { size_t align; unsigned char c[16]; } tmp;
128
129 assert (in && out && key && ivec);
130
131 if (len < 16) return 0;
132
133 residue=len%16;
134
135 len -= residue;
136
137 (*cbc)(in,out,len,key,ivec,1);
138
139 if (residue==0) return len;
140
141 in += len;
142 out += len;
143
144#if defined(CBC_HANDLES_TRUNCATED_IO)
145 (*cbc)(in,out-16+residue,residue,key,ivec,1);
146#else
147 {
148 size_t n;
149 for (n=0; n<16; n+=sizeof(size_t))
150 *(size_t *)(tmp.c+n) = 0;
151 memcpy(tmp.c,in,residue);
152 }
153 (*cbc)(tmp.c,out-16+residue,16,key,ivec,1);
154#endif
155 return len+residue;
156}
157
158size_t CRYPTO_cts128_decrypt_block(const unsigned char *in, unsigned char *out,
159 size_t len, const void *key,
160 unsigned char ivec[16], block128_f block)
161{ size_t residue, n;
162 union { size_t align; unsigned char c[32]; } tmp;
163
164 assert (in && out && key && ivec);
165
166 if (len<=16) return 0;
167
168 if ((residue=len%16) == 0) residue = 16;
169
170 len -= 16+residue;
171
172 if (len) {
173 CRYPTO_cbc128_decrypt(in,out,len,key,ivec,block);
174 in += len;
175 out += len;
176 }
177
178 (*block)(in,tmp.c+16,key);
179
180 for (n=0; n<16; n+=sizeof(size_t))
181 *(size_t *)(tmp.c+n) = *(size_t *)(tmp.c+16+n);
182 memcpy(tmp.c,in+16,residue);
183 (*block)(tmp.c,tmp.c,key);
184
185 for(n=0; n<16; ++n) {
186 unsigned char c = in[n];
187 out[n] = tmp.c[n] ^ ivec[n];
188 ivec[n] = c;
189 }
190 for(residue+=16; n<residue; ++n)
191 out[n] = tmp.c[n] ^ in[n];
192
193 return 16+len+residue;
194}
195
196size_t CRYPTO_nistcts128_decrypt_block(const unsigned char *in, unsigned char *out,
197 size_t len, const void *key,
198 unsigned char ivec[16], block128_f block)
199{ size_t residue, n;
200 union { size_t align; unsigned char c[32]; } tmp;
201
202 assert (in && out && key && ivec);
203
204 if (len<16) return 0;
205
206 residue=len%16;
207
208 if (residue==0) {
209 CRYPTO_cbc128_decrypt(in,out,len,key,ivec,block);
210 return len;
211 }
212
213 len -= 16+residue;
214
215 if (len) {
216 CRYPTO_cbc128_decrypt(in,out,len,key,ivec,block);
217 in += len;
218 out += len;
219 }
220
221 (*block)(in+residue,tmp.c+16,key);
222
223 for (n=0; n<16; n+=sizeof(size_t))
224 *(size_t *)(tmp.c+n) = *(size_t *)(tmp.c+16+n);
225 memcpy(tmp.c,in,residue);
226 (*block)(tmp.c,tmp.c,key);
227
228 for(n=0; n<16; ++n) {
229 unsigned char c = in[n];
230 out[n] = tmp.c[n] ^ ivec[n];
231 ivec[n] = in[n+residue];
232 tmp.c[n] = c;
233 }
234 for(residue+=16; n<residue; ++n)
235 out[n] = tmp.c[n] ^ tmp.c[n-16];
236
237 return 16+len+residue;
238}
239
240size_t CRYPTO_cts128_decrypt(const unsigned char *in, unsigned char *out,
241 size_t len, const void *key,
242 unsigned char ivec[16], cbc128_f cbc)
243{ size_t residue, n;
244 union { size_t align; unsigned char c[32]; } tmp;
245
246 assert (in && out && key && ivec);
247
248 if (len<=16) return 0;
249
250 if ((residue=len%16) == 0) residue = 16;
251
252 len -= 16+residue;
253
254 if (len) {
255 (*cbc)(in,out,len,key,ivec,0);
256 in += len;
257 out += len;
258 }
259
260 for (n=16; n<32; n+=sizeof(size_t))
261 *(size_t *)(tmp.c+n) = 0;
262 /* this places in[16] at &tmp.c[16] and decrypted block at &tmp.c[0] */
263 (*cbc)(in,tmp.c,16,key,tmp.c+16,0);
264
265 memcpy(tmp.c,in+16,residue);
266#if defined(CBC_HANDLES_TRUNCATED_IO)
267 (*cbc)(tmp.c,out,16+residue,key,ivec,0);
268#else
269 (*cbc)(tmp.c,tmp.c,32,key,ivec,0);
270 memcpy(out,tmp.c,16+residue);
271#endif
272 return 16+len+residue;
273}
274
275size_t CRYPTO_nistcts128_decrypt(const unsigned char *in, unsigned char *out,
276 size_t len, const void *key,
277 unsigned char ivec[16], cbc128_f cbc)
278{ size_t residue, n;
279 union { size_t align; unsigned char c[32]; } tmp;
280
281 assert (in && out && key && ivec);
282
283 if (len<16) return 0;
284
285 residue=len%16;
286
287 if (residue==0) {
288 (*cbc)(in,out,len,key,ivec,0);
289 return len;
290 }
291
292 len -= 16+residue;
293
294 if (len) {
295 (*cbc)(in,out,len,key,ivec,0);
296 in += len;
297 out += len;
298 }
299
300 for (n=16; n<32; n+=sizeof(size_t))
301 *(size_t *)(tmp.c+n) = 0;
302 /* this places in[16] at &tmp.c[16] and decrypted block at &tmp.c[0] */
303 (*cbc)(in+residue,tmp.c,16,key,tmp.c+16,0);
304
305 memcpy(tmp.c,in,residue);
306#if defined(CBC_HANDLES_TRUNCATED_IO)
307 (*cbc)(tmp.c,out,16+residue,key,ivec,0);
308#else
309 (*cbc)(tmp.c,tmp.c,32,key,ivec,0);
310 memcpy(out,tmp.c,16+residue);
311#endif
312 return 16+len+residue;
313}
314
315#if defined(SELFTEST)
316#include <stdio.h>
317#include <openssl/aes.h>
318
319/* test vectors from RFC 3962 */
320static const unsigned char test_key[16] = "chicken teriyaki";
321static const unsigned char test_input[64] =
322 "I would like the" " General Gau's C"
323 "hicken, please, " "and wonton soup.";
324static const unsigned char test_iv[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
325
326static const unsigned char vector_17[17] =
327{0xc6,0x35,0x35,0x68,0xf2,0xbf,0x8c,0xb4, 0xd8,0xa5,0x80,0x36,0x2d,0xa7,0xff,0x7f,
328 0x97};
329static const unsigned char vector_31[31] =
330{0xfc,0x00,0x78,0x3e,0x0e,0xfd,0xb2,0xc1, 0xd4,0x45,0xd4,0xc8,0xef,0xf7,0xed,0x22,
331 0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5};
332static const unsigned char vector_32[32] =
333{0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5,0xa8,
334 0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84};
335static const unsigned char vector_47[47] =
336{0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84,
337 0xb3,0xff,0xfd,0x94,0x0c,0x16,0xa1,0x8c, 0x1b,0x55,0x49,0xd2,0xf8,0x38,0x02,0x9e,
338 0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5};
339static const unsigned char vector_48[48] =
340{0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84,
341 0x9d,0xad,0x8b,0xbb,0x96,0xc4,0xcd,0xc0, 0x3b,0xc1,0x03,0xe1,0xa1,0x94,0xbb,0xd8,
342 0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5,0xa8};
343static const unsigned char vector_64[64] =
344{0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84,
345 0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5,0xa8,
346 0x48,0x07,0xef,0xe8,0x36,0xee,0x89,0xa5, 0x26,0x73,0x0d,0xbc,0x2f,0x7b,0xc8,0x40,
347 0x9d,0xad,0x8b,0xbb,0x96,0xc4,0xcd,0xc0, 0x3b,0xc1,0x03,0xe1,0xa1,0x94,0xbb,0xd8};
348
349static AES_KEY encks, decks;
350
351void test_vector(const unsigned char *vector,size_t len)
352{ unsigned char iv[sizeof(test_iv)];
353 unsigned char cleartext[64],ciphertext[64];
354 size_t tail;
355
356 printf("vector_%d\n",len); fflush(stdout);
357
358 if ((tail=len%16) == 0) tail = 16;
359 tail += 16;
360
361 /* test block-based encryption */
362 memcpy(iv,test_iv,sizeof(test_iv));
363 CRYPTO_cts128_encrypt_block(test_input,ciphertext,len,&encks,iv,(block128_f)AES_encrypt);
364 if (memcmp(ciphertext,vector,len))
365 fprintf(stderr,"output_%d mismatch\n",len), exit(1);
366 if (memcmp(iv,vector+len-tail,sizeof(iv)))
367 fprintf(stderr,"iv_%d mismatch\n",len), exit(1);
368
369 /* test block-based decryption */
370 memcpy(iv,test_iv,sizeof(test_iv));
371 CRYPTO_cts128_decrypt_block(ciphertext,cleartext,len,&decks,iv,(block128_f)AES_decrypt);
372 if (memcmp(cleartext,test_input,len))
373 fprintf(stderr,"input_%d mismatch\n",len), exit(2);
374 if (memcmp(iv,vector+len-tail,sizeof(iv)))
375 fprintf(stderr,"iv_%d mismatch\n",len), exit(2);
376
377 /* test streamed encryption */
378 memcpy(iv,test_iv,sizeof(test_iv));
379 CRYPTO_cts128_encrypt(test_input,ciphertext,len,&encks,iv,(cbc128_f)AES_cbc_encrypt);
380 if (memcmp(ciphertext,vector,len))
381 fprintf(stderr,"output_%d mismatch\n",len), exit(3);
382 if (memcmp(iv,vector+len-tail,sizeof(iv)))
383 fprintf(stderr,"iv_%d mismatch\n",len), exit(3);
384
385 /* test streamed decryption */
386 memcpy(iv,test_iv,sizeof(test_iv));
387 CRYPTO_cts128_decrypt(ciphertext,cleartext,len,&decks,iv,(cbc128_f)AES_cbc_encrypt);
388 if (memcmp(cleartext,test_input,len))
389 fprintf(stderr,"input_%d mismatch\n",len), exit(4);
390 if (memcmp(iv,vector+len-tail,sizeof(iv)))
391 fprintf(stderr,"iv_%d mismatch\n",len), exit(4);
392}
393
394void test_nistvector(const unsigned char *vector,size_t len)
395{ unsigned char iv[sizeof(test_iv)];
396 unsigned char cleartext[64],ciphertext[64],nistvector[64];
397 size_t tail;
398
399 printf("nistvector_%d\n",len); fflush(stdout);
400
401 if ((tail=len%16) == 0) tail = 16;
402
403 len -= 16 + tail;
404 memcpy(nistvector,vector,len);
405 /* flip two last blocks */
406 memcpy(nistvector+len,vector+len+16,tail);
407 memcpy(nistvector+len+tail,vector+len,16);
408 len += 16 + tail;
409 tail = 16;
410
411 /* test block-based encryption */
412 memcpy(iv,test_iv,sizeof(test_iv));
413 CRYPTO_nistcts128_encrypt_block(test_input,ciphertext,len,&encks,iv,(block128_f)AES_encrypt);
414 if (memcmp(ciphertext,nistvector,len))
415 fprintf(stderr,"output_%d mismatch\n",len), exit(1);
416 if (memcmp(iv,nistvector+len-tail,sizeof(iv)))
417 fprintf(stderr,"iv_%d mismatch\n",len), exit(1);
418
419 /* test block-based decryption */
420 memcpy(iv,test_iv,sizeof(test_iv));
421 CRYPTO_nistcts128_decrypt_block(ciphertext,cleartext,len,&decks,iv,(block128_f)AES_decrypt);
422 if (memcmp(cleartext,test_input,len))
423 fprintf(stderr,"input_%d mismatch\n",len), exit(2);
424 if (memcmp(iv,nistvector+len-tail,sizeof(iv)))
425 fprintf(stderr,"iv_%d mismatch\n",len), exit(2);
426
427 /* test streamed encryption */
428 memcpy(iv,test_iv,sizeof(test_iv));
429 CRYPTO_nistcts128_encrypt(test_input,ciphertext,len,&encks,iv,(cbc128_f)AES_cbc_encrypt);
430 if (memcmp(ciphertext,nistvector,len))
431 fprintf(stderr,"output_%d mismatch\n",len), exit(3);
432 if (memcmp(iv,nistvector+len-tail,sizeof(iv)))
433 fprintf(stderr,"iv_%d mismatch\n",len), exit(3);
434
435 /* test streamed decryption */
436 memcpy(iv,test_iv,sizeof(test_iv));
437 CRYPTO_nistcts128_decrypt(ciphertext,cleartext,len,&decks,iv,(cbc128_f)AES_cbc_encrypt);
438 if (memcmp(cleartext,test_input,len))
439 fprintf(stderr,"input_%d mismatch\n",len), exit(4);
440 if (memcmp(iv,nistvector+len-tail,sizeof(iv)))
441 fprintf(stderr,"iv_%d mismatch\n",len), exit(4);
442}
443
444int main()
445{
446 AES_set_encrypt_key(test_key,128,&encks);
447 AES_set_decrypt_key(test_key,128,&decks);
448
449 test_vector(vector_17,sizeof(vector_17));
450 test_vector(vector_31,sizeof(vector_31));
451 test_vector(vector_32,sizeof(vector_32));
452 test_vector(vector_47,sizeof(vector_47));
453 test_vector(vector_48,sizeof(vector_48));
454 test_vector(vector_64,sizeof(vector_64));
455
456 test_nistvector(vector_17,sizeof(vector_17));
457 test_nistvector(vector_31,sizeof(vector_31));
458 test_nistvector(vector_32,sizeof(vector_32));
459 test_nistvector(vector_47,sizeof(vector_47));
460 test_nistvector(vector_48,sizeof(vector_48));
461 test_nistvector(vector_64,sizeof(vector_64));
462
463 return 0;
464}
465#endif
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