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-rw-r--r--src/lib/libcrypto/modes/cts128.c259
1 files changed, 0 insertions, 259 deletions
diff --git a/src/lib/libcrypto/modes/cts128.c b/src/lib/libcrypto/modes/cts128.c
deleted file mode 100644
index e0430f9fdc..0000000000
--- a/src/lib/libcrypto/modes/cts128.c
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@@ -1,259 +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 "modes.h"
9#include <string.h>
10
11#ifndef MODES_DEBUG
12# ifndef NDEBUG
13# define NDEBUG
14# endif
15#endif
16#include <assert.h>
17
18/*
19 * Trouble with Ciphertext Stealing, CTS, mode is that there is no
20 * common official specification, but couple of cipher/application
21 * specific ones: RFC2040 and RFC3962. Then there is 'Proposal to
22 * Extend CBC Mode By "Ciphertext Stealing"' at NIST site, which
23 * deviates from mentioned RFCs. Most notably it allows input to be
24 * of block length and it doesn't flip the order of the last two
25 * blocks. CTS is being discussed even in ECB context, but it's not
26 * adopted for any known application. This implementation complies
27 * with mentioned RFCs and [as such] extends CBC mode.
28 */
29
30size_t CRYPTO_cts128_encrypt_block(const unsigned char *in, unsigned char *out,
31 size_t len, const void *key,
32 unsigned char ivec[16], block128_f block)
33{ size_t residue, n;
34
35 assert (in && out && key && ivec);
36
37 if (len <= 16) return 0;
38
39 if ((residue=len%16) == 0) residue = 16;
40
41 len -= residue;
42
43 CRYPTO_cbc128_encrypt(in,out,len,key,ivec,block);
44
45 in += len;
46 out += len;
47
48 for (n=0; n<residue; ++n)
49 ivec[n] ^= in[n];
50 (*block)(ivec,ivec,key);
51 memcpy(out,out-16,residue);
52 memcpy(out-16,ivec,16);
53
54 return len+residue;
55}
56
57size_t CRYPTO_cts128_encrypt(const unsigned char *in, unsigned char *out,
58 size_t len, const void *key,
59 unsigned char ivec[16], cbc128_f cbc)
60{ size_t residue;
61 union { size_t align; unsigned char c[16]; } tmp;
62
63 assert (in && out && key && ivec);
64
65 if (len <= 16) return 0;
66
67 if ((residue=len%16) == 0) residue = 16;
68
69 len -= residue;
70
71 (*cbc)(in,out,len,key,ivec,1);
72
73 in += len;
74 out += len;
75
76#if defined(CBC_HANDLES_TRUNCATED_IO)
77 memcpy(tmp.c,out-16,16);
78 (*cbc)(in,out-16,residue,key,ivec,1);
79 memcpy(out,tmp.c,residue);
80#else
81 {
82 size_t n;
83 for (n=0; n<16; n+=sizeof(size_t))
84 *(size_t *)(tmp.c+n) = 0;
85 memcpy(tmp.c,in,residue);
86 }
87 memcpy(out,out-16,residue);
88 (*cbc)(tmp.c,out-16,16,key,ivec,1);
89#endif
90 return len+residue;
91}
92
93size_t CRYPTO_cts128_decrypt_block(const unsigned char *in, unsigned char *out,
94 size_t len, const void *key,
95 unsigned char ivec[16], block128_f block)
96{ size_t residue, n;
97 union { size_t align; unsigned char c[32]; } tmp;
98
99 assert (in && out && key && ivec);
100
101 if (len<=16) return 0;
102
103 if ((residue=len%16) == 0) residue = 16;
104
105 len -= 16+residue;
106
107 if (len) {
108 CRYPTO_cbc128_decrypt(in,out,len,key,ivec,block);
109 in += len;
110 out += len;
111 }
112
113 (*block)(in,tmp.c+16,key);
114
115 for (n=0; n<16; n+=sizeof(size_t))
116 *(size_t *)(tmp.c+n) = *(size_t *)(tmp.c+16+n);
117 memcpy(tmp.c,in+16,residue);
118 (*block)(tmp.c,tmp.c,key);
119
120 for(n=0; n<16; ++n) {
121 unsigned char c = in[n];
122 out[n] = tmp.c[n] ^ ivec[n];
123 ivec[n] = c;
124 }
125 for(residue+=16; n<residue; ++n)
126 out[n] = tmp.c[n] ^ in[n];
127
128 return len+residue-16;
129}
130
131size_t CRYPTO_cts128_decrypt(const unsigned char *in, unsigned char *out,
132 size_t len, const void *key,
133 unsigned char ivec[16], cbc128_f cbc)
134{ size_t residue, n;
135 union { size_t align; unsigned char c[32]; } tmp;
136
137 assert (in && out && key && ivec);
138
139 if (len<=16) return 0;
140
141 if ((residue=len%16) == 0) residue = 16;
142
143 len -= 16+residue;
144
145 if (len) {
146 (*cbc)(in,out,len,key,ivec,0);
147 in += len;
148 out += len;
149 }
150
151 for (n=16; n<32; n+=sizeof(size_t))
152 *(size_t *)(tmp.c+n) = 0;
153 /* this places in[16] at &tmp.c[16] and decrypted block at &tmp.c[0] */
154 (*cbc)(in,tmp.c,16,key,tmp.c+16,0);
155
156 memcpy(tmp.c,in+16,residue);
157#if defined(CBC_HANDLES_TRUNCATED_IO)
158 (*cbc)(tmp.c,out,16+residue,key,ivec,0);
159#else
160 (*cbc)(tmp.c,tmp.c,32,key,ivec,0);
161 memcpy(out,tmp.c,16+residue);
162#endif
163 return len+residue;
164}
165
166#if defined(SELFTEST)
167#include <stdio.h>
168#include <openssl/aes.h>
169
170/* test vectors from RFC 3962 */
171static const unsigned char test_key[16] = "chicken teriyaki";
172static const unsigned char test_input[64] =
173 "I would like the" " General Gau's C"
174 "hicken, please, " "and wonton soup.";
175static const unsigned char test_iv[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
176
177static const unsigned char vector_17[17] =
178{0xc6,0x35,0x35,0x68,0xf2,0xbf,0x8c,0xb4, 0xd8,0xa5,0x80,0x36,0x2d,0xa7,0xff,0x7f,
179 0x97};
180static const unsigned char vector_31[31] =
181{0xfc,0x00,0x78,0x3e,0x0e,0xfd,0xb2,0xc1, 0xd4,0x45,0xd4,0xc8,0xef,0xf7,0xed,0x22,
182 0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5};
183static const unsigned char vector_32[32] =
184{0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5,0xa8,
185 0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84};
186static const unsigned char vector_47[47] =
187{0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84,
188 0xb3,0xff,0xfd,0x94,0x0c,0x16,0xa1,0x8c, 0x1b,0x55,0x49,0xd2,0xf8,0x38,0x02,0x9e,
189 0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5};
190static const unsigned char vector_48[48] =
191{0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84,
192 0x9d,0xad,0x8b,0xbb,0x96,0xc4,0xcd,0xc0, 0x3b,0xc1,0x03,0xe1,0xa1,0x94,0xbb,0xd8,
193 0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5,0xa8};
194static const unsigned char vector_64[64] =
195{0x97,0x68,0x72,0x68,0xd6,0xec,0xcc,0xc0, 0xc0,0x7b,0x25,0xe2,0x5e,0xcf,0xe5,0x84,
196 0x39,0x31,0x25,0x23,0xa7,0x86,0x62,0xd5, 0xbe,0x7f,0xcb,0xcc,0x98,0xeb,0xf5,0xa8,
197 0x48,0x07,0xef,0xe8,0x36,0xee,0x89,0xa5, 0x26,0x73,0x0d,0xbc,0x2f,0x7b,0xc8,0x40,
198 0x9d,0xad,0x8b,0xbb,0x96,0xc4,0xcd,0xc0, 0x3b,0xc1,0x03,0xe1,0xa1,0x94,0xbb,0xd8};
199
200static AES_KEY encks, decks;
201
202void test_vector(const unsigned char *vector,size_t len)
203{ unsigned char cleartext[64];
204 unsigned char iv[sizeof(test_iv)];
205 unsigned char ciphertext[64];
206 size_t tail;
207
208 printf("vector_%d\n",len); fflush(stdout);
209
210 if ((tail=len%16) == 0) tail = 16;
211 tail += 16;
212
213 /* test block-based encryption */
214 memcpy(iv,test_iv,sizeof(test_iv));
215 CRYPTO_cts128_encrypt_block(test_input,ciphertext,len,&encks,iv,(block128_f)AES_encrypt);
216 if (memcmp(ciphertext,vector,len))
217 fprintf(stderr,"output_%d mismatch\n",len), exit(1);
218 if (memcmp(iv,vector+len-tail,sizeof(iv)))
219 fprintf(stderr,"iv_%d mismatch\n",len), exit(1);
220
221 /* test block-based decryption */
222 memcpy(iv,test_iv,sizeof(test_iv));
223 CRYPTO_cts128_decrypt_block(ciphertext,cleartext,len,&decks,iv,(block128_f)AES_decrypt);
224 if (memcmp(cleartext,test_input,len))
225 fprintf(stderr,"input_%d mismatch\n",len), exit(2);
226 if (memcmp(iv,vector+len-tail,sizeof(iv)))
227 fprintf(stderr,"iv_%d mismatch\n",len), exit(2);
228
229 /* test streamed encryption */
230 memcpy(iv,test_iv,sizeof(test_iv));
231 CRYPTO_cts128_encrypt(test_input,ciphertext,len,&encks,iv,(cbc128_f)AES_cbc_encrypt);
232 if (memcmp(ciphertext,vector,len))
233 fprintf(stderr,"output_%d mismatch\n",len), exit(3);
234 if (memcmp(iv,vector+len-tail,sizeof(iv)))
235 fprintf(stderr,"iv_%d mismatch\n",len), exit(3);
236
237 /* test streamed decryption */
238 memcpy(iv,test_iv,sizeof(test_iv));
239 CRYPTO_cts128_decrypt(ciphertext,cleartext,len,&decks,iv,(cbc128_f)AES_cbc_encrypt);
240 if (memcmp(cleartext,test_input,len))
241 fprintf(stderr,"input_%d mismatch\n",len), exit(4);
242 if (memcmp(iv,vector+len-tail,sizeof(iv)))
243 fprintf(stderr,"iv_%d mismatch\n",len), exit(4);
244}
245
246main()
247{
248 AES_set_encrypt_key(test_key,128,&encks);
249 AES_set_decrypt_key(test_key,128,&decks);
250
251 test_vector(vector_17,sizeof(vector_17));
252 test_vector(vector_31,sizeof(vector_31));
253 test_vector(vector_32,sizeof(vector_32));
254 test_vector(vector_47,sizeof(vector_47));
255 test_vector(vector_48,sizeof(vector_48));
256 test_vector(vector_64,sizeof(vector_64));
257 exit(0);
258}
259#endif
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