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Comparing Crypt-Twofish2/aes.h (file contents):
Revision 1.2 by root, Wed Dec 1 02:12:30 2010 UTC vs.
Revision 1.3 by root, Sun Aug 1 12:32:14 2021 UTC

… …
10 National Institute of Standards and Technology 10 National Institute of Standards and Technology
11 11
12 This sample is to assist implementers developing to the 12 This sample is to assist implementers developing to the
13Cryptographic API Profile for AES Candidate Algorithm Submissions. 13Cryptographic API Profile for AES Candidate Algorithm Submissions.
14Please consult this document as a cross-reference. 14Please consult this document as a cross-reference.
15 15
16 ANY CHANGES, WHERE APPROPRIATE, TO INFORMATION PROVIDED IN THIS FILE 16 ANY CHANGES, WHERE APPROPRIATE, TO INFORMATION PROVIDED IN THIS FILE
17MUST BE DOCUMENTED. CHANGES ARE ONLY APPROPRIATE WHERE SPECIFIED WITH 17MUST BE DOCUMENTED. CHANGES ARE ONLY APPROPRIATE WHERE SPECIFIED WITH
18THE STRING "CHANGE POSSIBLE". FUNCTION CALLS AND THEIR PARAMETERS 18THE STRING "CHANGE POSSIBLE". FUNCTION CALLS AND THEIR PARAMETERS
19CANNOT BE CHANGED. STRUCTURES CAN BE ALTERED TO ALLOW IMPLEMENTERS TO 19CANNOT BE CHANGED. STRUCTURES CAN BE ALTERED TO ALLOW IMPLEMENTERS TO
20INCLUDE IMPLEMENTATION SPECIFIC INFORMATION. 20INCLUDE IMPLEMENTATION SPECIFIC INFORMATION.
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76*/ 76*/
77 77
78typedef DWORD fullSbox[4][256]; 78typedef DWORD fullSbox[4][256];
79 79
80/* The structure for key information */ 80/* The structure for key information */
81typedef struct 81typedef struct
82 { 82 {
83 BYTE direction; /* Key used for encrypting or decrypting? */ 83 BYTE direction; /* Key used for encrypting or decrypting? */
84#if ALIGN32 84#if ALIGN32
85 BYTE dummyAlign[3]; /* keep 32-bit alignment */ 85 BYTE dummyAlign[3]; /* keep 32-bit alignment */
86#endif 86#endif
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106 #endif 106 #endif
107#endif 107#endif
108 } keyInstance; 108 } keyInstance;
109 109
110/* The structure for cipher information */ 110/* The structure for cipher information */
111typedef struct 111typedef struct
112 { 112 {
113 BYTE mode; /* MODE_ECB, MODE_CBC, or MODE_CFB1 */ 113 BYTE mode; /* MODE_ECB, MODE_CBC, or MODE_CFB1 */
114#if ALIGN32 114#if ALIGN32
115 BYTE dummyAlign[3]; /* keep 32-bit alignment */ 115 BYTE dummyAlign[3]; /* keep 32-bit alignment */
116#endif 116#endif
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165initializes some internal keyInstance state, then parse the ASCII 165initializes some internal keyInstance state, then parse the ASCII
166string into the binary key32, and calls reKey(). To initialize the 166string into the binary key32, and calls reKey(). To initialize the
167keyInstance state, use a 'dummy' call to makeKey(); i.e., set the 167keyInstance state, use a 'dummy' call to makeKey(); i.e., set the
168keyMaterial parameter to NULL. Then use reKey() for all key changes. 168keyMaterial parameter to NULL. Then use reKey() for all key changes.
169Similarly, cipherInit takes an IV string in ASCII hex, so a dummy setup 169Similarly, cipherInit takes an IV string in ASCII hex, so a dummy setup
170call with a null IV string will skip the ASCII parse. 170call with a null IV string will skip the ASCII parse.
171 171
172Note that CFB mode is not well tested nor defined by AES, so using the 172Note that CFB mode is not well tested nor defined by AES, so using the
173Twofish MODE_CFB it not recommended. If you wish to implement a CFB mode, 173Twofish MODE_CFB it not recommended. If you wish to implement a CFB mode,
174build it external to the Twofish code, using the Twofish functions only 174build it external to the Twofish code, using the Twofish functions only
175in ECB mode. 175in ECB mode.
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206 206
207 if (makeKey(&ki,DIR_ENCRYPT,keySize,NULL) != TRUE) 207 if (makeKey(&ki,DIR_ENCRYPT,keySize,NULL) != TRUE)
208 return 1; /* 'dummy' setup for a 128-bit key */ 208 return 1; /* 'dummy' setup for a 128-bit key */
209 if (cipherInit(&ci,mode,NULL) != TRUE) 209 if (cipherInit(&ci,mode,NULL) != TRUE)
210 return 1; /* 'dummy' setup for cipher */ 210 return 1; /* 'dummy' setup for cipher */
211 211
212 for (i=0;i<keySize/32;i++) /* select key bits */ 212 for (i=0;i<keySize/32;i++) /* select key bits */
213 ki.key32[i]=0x10003 * rand(); 213 ki.key32[i]=0x10003 * rand();
214 reKey(&ki); /* run the key schedule */ 214 reKey(&ki); /* run the key schedule */
215 215
216 if (mode != MODE_ECB) /* set up random iv (if needed)*/ 216 if (mode != MODE_ECB) /* set up random iv (if needed)*/
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224 /* e.g., byteCnt = 16, 32, 48, 64 */ 224 /* e.g., byteCnt = 16, 32, 48, 64 */
225 byteCnt = (BLOCK_SIZE/8) * (1 + (rand() % MAX_BLK_CNT)); 225 byteCnt = (BLOCK_SIZE/8) * (1 + (rand() % MAX_BLK_CNT));
226 226
227 for (i=0;i<byteCnt;i++) /* generate test data */ 227 for (i=0;i<byteCnt;i++) /* generate test data */
228 plainText[i]=(BYTE) rand(); 228 plainText[i]=(BYTE) rand();
229 229
230 /* encrypt the bytes */ 230 /* encrypt the bytes */
231 if (blockEncrypt(&ci,&ki, plainText,byteCnt*8,cipherText) != byteCnt*8) 231 if (blockEncrypt(&ci,&ki, plainText,byteCnt*8,cipherText) != byteCnt*8)
232 return 1; 232 return 1;
233 233
234 /* decrypt the bytes */ 234 /* decrypt the bytes */
235 if (mode != MODE_ECB) /* first re-init the IV (if needed) */ 235 if (mode != MODE_ECB) /* first re-init the IV (if needed) */
236 memcpy(ci.iv32,iv,sizeof(ci.iv32)); 236 memcpy(ci.iv32,iv,sizeof(ci.iv32));
237 237
238 if (blockDecrypt(&ci,&ki,cipherText,byteCnt*8,decryptOut) != byteCnt*8) 238 if (blockDecrypt(&ci,&ki,cipherText,byteCnt*8,decryptOut) != byteCnt*8)
239 return 1; 239 return 1;
240 240
241 /* make sure the decrypt output matches original plaintext */ 241 /* make sure the decrypt output matches original plaintext */
242 if (memcmp(plainText,decryptOut,byteCnt)) 242 if (memcmp(plainText,decryptOut,byteCnt))
243 return 1; 243 return 1;
244 244
245 return 0; /* tests passed! */ 245 return 0; /* tests passed! */
246 } 246 }
247 247
248void main(void) 248void main(void)

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