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comparison aes-asm-ltc.c @ 908:3ca7113936c1 asm

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aes and sha1 for arm
author Matt Johnston <matt@ucc.asn.au>
date Sun, 06 Oct 2013 21:49:15 +0800
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826:125012c4d107 908:3ca7113936c1
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtomcrypt.com
10 */
11
12 /* AES implementation by Tom St Denis
13 *
14 * Derived from the Public Domain source code by
15
16 ---
17 * rijndael-alg-fst.c
18 *
19 * @version 3.0 (December 2000)
20 *
21 * Optimised ANSI C code for the Rijndael cipher (now AES)
22 *
23 * @author Vincent Rijmen <[email protected]>
24 * @author Antoon Bosselaers <[email protected]>
25 * @author Paulo Barreto <[email protected]>
26 ---
27 */
28 /**
29 @file aes.c
30 Implementation of AES
31 */
32
33 #include "options.h"
34 #include "tomcrypt.h"
35
36 #ifdef DROPBEAR_AES_ASM
37
38 #define SETUP aes_asm_setup
39 #define ECB_ENC aes_asm_ecb_encrypt
40 #define ECB_DEC aes_asm_ecb_decrypt
41 #define ECB_DONE aes_asm_done
42 #define ECB_TEST aes_asm_test
43 #define ECB_KS aes_asm_keysize
44
45
46 /* Matches the AES key structure used by OpenSSL */
47 struct aes_asm_key {
48 ulong32 key[60];
49 int rounds;
50 };
51
52 struct aes_asm_keypair {
53 struct aes_asm_key enc;
54 struct aes_asm_key dec;
55 };
56
57 int private_AES_set_encrypt_key(const unsigned char* key,
58 int keybits, struct aes_asm_key* key_state);
59 int private_AES_set_decrypt_key(const unsigned char* key,
60 int keybits, struct aes_asm_key* key_state);
61 int AES_encrypt(const unsigned char* in,
62 const unsigned char* out,
63 struct aes_asm_key* key_state);
64 int AES_decrypt(const unsigned char* in,
65 const unsigned char* out,
66 struct aes_asm_key* key_state);
67
68 /**
69 Initialize the AES (Rijndael) block cipher
70 @param key The symmetric key you wish to pass
71 @param keylen The key length in bytes
72 @param num_rounds The number of rounds desired (0 for default)
73 @param skey The key in as scheduled by this function.
74 @return CRYPT_OK if successful
75 */
76 int SETUP(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey)
77 {
78 struct aes_asm_keypair *keypair = NULL;
79 LTC_ARGCHK(key != NULL);
80 LTC_ARGCHK(skey != NULL);
81
82 if (keylen != 16 && keylen != 24 && keylen != 32) {
83 return CRYPT_INVALID_KEYSIZE;
84 }
85
86 if (num_rounds != 0)
87 {
88 return CRYPT_INVALID_ROUNDS;
89 }
90
91 skey->data = XMALLOC(sizeof(*keypair));
92 keypair = skey->data;
93 private_AES_set_encrypt_key(key, keylen*8, &keypair->enc);
94 private_AES_set_decrypt_key(key, keylen*8, &keypair->dec);
95 return CRYPT_OK;
96 }
97
98 /**
99 Encrypts a block of text with AES
100 @param pt The input plaintext (16 bytes)
101 @param ct The output ciphertext (16 bytes)
102 @param skey The key as scheduled
103 @return CRYPT_OK if successful
104 */
105 int ECB_ENC(const unsigned char *pt, unsigned char *ct, symmetric_key *skey)
106 {
107 struct aes_asm_keypair *keypair = NULL;
108 LTC_ARGCHK(pt != NULL);
109 LTC_ARGCHK(ct != NULL);
110 LTC_ARGCHK(skey != NULL);
111
112 keypair = skey->data;
113 AES_encrypt(pt, ct, &keypair->enc);
114
115 return CRYPT_OK;
116 }
117
118 /**
119 Decrypts a block of text with AES
120 @param ct The input ciphertext (16 bytes)
121 @param pt The output plaintext (16 bytes)
122 @param skey The key as scheduled
123 @return CRYPT_OK if successful
124 */
125 int ECB_DEC(const unsigned char *ct, unsigned char *pt, symmetric_key *skey)
126 {
127 struct aes_asm_keypair *keypair = NULL;
128
129 LTC_ARGCHK(pt != NULL);
130 LTC_ARGCHK(ct != NULL);
131 LTC_ARGCHK(skey != NULL);
132
133 keypair = skey->data;
134 AES_encrypt(pt, ct, &keypair->enc);
135
136 return CRYPT_OK;
137 }
138
139 #ifdef LTC_CLEAN_STACK
140 #error No clean stack support in ASM AES
141 #endif
142
143 /**
144 Performs a self-test of the AES block cipher
145 @return CRYPT_OK if functional, CRYPT_NOP if self-test has been disabled
146 */
147 int ECB_TEST(void)
148 {
149 #ifndef LTC_TEST
150 return CRYPT_NOP;
151 #else
152 int err;
153 static const struct {
154 int keylen;
155 unsigned char key[32], pt[16], ct[16];
156 } tests[] = {
157 { 16,
158 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
159 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f },
160 { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
161 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff },
162 { 0x69, 0xc4, 0xe0, 0xd8, 0x6a, 0x7b, 0x04, 0x30,
163 0xd8, 0xcd, 0xb7, 0x80, 0x70, 0xb4, 0xc5, 0x5a }
164 }, {
165 24,
166 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
167 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
168 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 },
169 { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
170 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff },
171 { 0xdd, 0xa9, 0x7c, 0xa4, 0x86, 0x4c, 0xdf, 0xe0,
172 0x6e, 0xaf, 0x70, 0xa0, 0xec, 0x0d, 0x71, 0x91 }
173 }, {
174 32,
175 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
176 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
177 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
178 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f },
179 { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
180 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff },
181 { 0x8e, 0xa2, 0xb7, 0xca, 0x51, 0x67, 0x45, 0xbf,
182 0xea, 0xfc, 0x49, 0x90, 0x4b, 0x49, 0x60, 0x89 }
183 }
184 };
185
186 symmetric_key key;
187 unsigned char tmp[2][16];
188 int i, y;
189
190 for (i = 0; i < (int)(sizeof(tests)/sizeof(tests[0])); i++) {
191 zeromem(&key, sizeof(key));
192 if ((err = rijndael_setup(tests[i].key, tests[i].keylen, 0, &key)) != CRYPT_OK) {
193 return err;
194 }
195
196 rijndael_ecb_encrypt(tests[i].pt, tmp[0], &key);
197 rijndael_ecb_decrypt(tmp[0], tmp[1], &key);
198 if (XMEMCMP(tmp[0], tests[i].ct, 16) || XMEMCMP(tmp[1], tests[i].pt, 16)) {
199 #if 0
200 printf("\n\nTest %d failed\n", i);
201 if (XMEMCMP(tmp[0], tests[i].ct, 16)) {
202 printf("CT: ");
203 for (i = 0; i < 16; i++) {
204 printf("%02x ", tmp[0][i]);
205 }
206 printf("\n");
207 } else {
208 printf("PT: ");
209 for (i = 0; i < 16; i++) {
210 printf("%02x ", tmp[1][i]);
211 }
212 printf("\n");
213 }
214 #endif
215 return CRYPT_FAIL_TESTVECTOR;
216 }
217
218 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */
219 for (y = 0; y < 16; y++) tmp[0][y] = 0;
220 for (y = 0; y < 1000; y++) rijndael_ecb_encrypt(tmp[0], tmp[0], &key);
221 for (y = 0; y < 1000; y++) rijndael_ecb_decrypt(tmp[0], tmp[0], &key);
222 for (y = 0; y < 16; y++) if (tmp[0][y] != 0) return CRYPT_FAIL_TESTVECTOR;
223 }
224 return CRYPT_OK;
225 #endif
226 }
227
228 /** Terminate the context
229 @param skey The scheduled key
230 */
231 void ECB_DONE(symmetric_key *skey)
232 {
233 XFREE(skey->data);
234 }
235
236
237 /**
238 Gets suitable key size
239 @param keysize [in/out] The length of the recommended key (in bytes). This function will store the suitable size back in this variable.
240 @return CRYPT_OK if the input key size is acceptable.
241 */
242 int ECB_KS(int *keysize)
243 {
244 LTC_ARGCHK(keysize != NULL);
245
246 if (*keysize < 16)
247 return CRYPT_INVALID_KEYSIZE;
248 if (*keysize < 24) {
249 *keysize = 16;
250 return CRYPT_OK;
251 } else if (*keysize < 32) {
252 *keysize = 24;
253 return CRYPT_OK;
254 } else {
255 *keysize = 32;
256 return CRYPT_OK;
257 }
258 }
259
260 const struct ltc_cipher_descriptor aes_asm_desc =
261 {
262 "aes_asm",
263 106,
264 16, 32, 16, 10,
265 SETUP, ECB_ENC, ECB_DEC, ECB_TEST, ECB_DONE, ECB_KS,
266 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
267 };
268
269 #endif /* AES_ASM */
270
271
272
273 /* $Source: /cvs/libtom/libtomcrypt/src/ciphers/aes/aes.c,v $ */
274 /* $Revision: 1.14 $ */
275 /* $Date: 2006/11/08 23:01:06 $ */