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1.1 root 1: /* DESC.C - Data Encryption Standard routines for RSAREF 1.1.1.2 ! root 2: Based on "Karn/Hoey/Outerbridge" implementation (KHODES) 1.1 root 3: */ 4: 5: #include "global.h" 6: #include "rsaref.h" 7: #include "des.h" 8: 1.1.1.2 ! root 9: static UINT2 BYTE_BIT[8] = { ! 10: 0200, 0100, 040, 020, 010, 04, 02, 01 1.1 root 11: }; 12: 1.1.1.2 ! root 13: static UINT4 BIG_BYTE[24] = { ! 14: 0x800000L, 0x400000L, 0x200000L, 0x100000L, ! 15: 0x80000L, 0x40000L, 0x20000L, 0x10000L, ! 16: 0x8000L, 0x4000L, 0x2000L, 0x1000L, ! 17: 0x800L, 0x400L, 0x200L, 0x100L, ! 18: 0x80L, 0x40L, 0x20L, 0x10L, ! 19: 0x8L, 0x4L, 0x2L, 0x1L 1.1 root 20: }; 21: 1.1.1.2 ! root 22: static unsigned char PC1[56] = { ! 23: 56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17, ! 24: 9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, ! 25: 62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, ! 26: 13, 5, 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, 3 1.1 root 27: }; 28: 1.1.1.2 ! root 29: static unsigned char TOTAL_ROTATIONS[16] = { ! 30: 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28 1.1 root 31: }; 32: 1.1.1.2 ! root 33: static unsigned char PC2[48] = { ! 34: 13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9, ! 35: 22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1, ! 36: 40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47, ! 37: 43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 1.1 root 38: }; 39: 1.1.1.2 ! root 40: static UINT4 SP1[64] = { ! 41: 0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L, ! 42: 0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L, ! 43: 0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L, ! 44: 0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L, ! 45: 0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L, ! 46: 0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L, ! 47: 0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L, ! 48: 0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L, ! 49: 0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L, ! 50: 0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L, ! 51: 0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L, ! 52: 0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L, ! 53: 0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L, ! 54: 0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L, ! 55: 0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L, ! 56: 0x00010004L, 0x00010400L, 0x00000000L, 0x01010004L 1.1 root 57: }; 58: 1.1.1.2 ! root 59: static UINT4 SP2[64] = { ! 60: 0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L, ! 61: 0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L, ! 62: 0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L, ! 63: 0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L, ! 64: 0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L, ! 65: 0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L, ! 66: 0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L, ! 67: 0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L, ! 68: 0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L, ! 69: 0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L, ! 70: 0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L, ! 71: 0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L, ! 72: 0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L, ! 73: 0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L, ! 74: 0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L, ! 75: 0x80000000L, 0x80100020L, 0x80108020L, 0x00108000L 1.1 root 76: }; 77: 1.1.1.2 ! root 78: static UINT4 SP3[64] = { ! 79: 0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L, ! 80: 0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L, ! 81: 0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L, ! 82: 0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L, ! 83: 0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L, ! 84: 0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L, ! 85: 0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L, ! 86: 0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L, ! 87: 0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L, ! 88: 0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L, ! 89: 0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L, ! 90: 0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L, ! 91: 0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L, ! 92: 0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L, ! 93: 0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L, ! 94: 0x00020208L, 0x00000008L, 0x08020008L, 0x00020200L 1.1 root 95: }; 96: 1.1.1.2 ! root 97: static UINT4 SP4[64] = { ! 98: 0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L, ! 99: 0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L, ! 100: 0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L, ! 101: 0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L, ! 102: 0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L, ! 103: 0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L, ! 104: 0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L, ! 105: 0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L, ! 106: 0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L, ! 107: 0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L, ! 108: 0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L, ! 109: 0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L, ! 110: 0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L, ! 111: 0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L, ! 112: 0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L, ! 113: 0x00000080L, 0x00800000L, 0x00002000L, 0x00802080L ! 114: }; ! 115: ! 116: static UINT4 SP5[64] = { ! 117: 0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L, ! 118: 0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L, ! 119: 0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L, ! 120: 0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L, ! 121: 0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L, ! 122: 0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L, ! 123: 0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L, ! 124: 0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L, ! 125: 0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L, ! 126: 0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L, ! 127: 0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L, ! 128: 0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L, ! 129: 0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L, ! 130: 0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L, ! 131: 0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L, ! 132: 0x00000000L, 0x40080000L, 0x02080100L, 0x40000100L ! 133: }; ! 134: ! 135: static UINT4 SP6[64] = { ! 136: 0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L, ! 137: 0x20400000L, 0x00000010L, 0x20404010L, 0x00400000L, ! 138: 0x20004000L, 0x00404010L, 0x00400000L, 0x20000010L, ! 139: 0x00400010L, 0x20004000L, 0x20000000L, 0x00004010L, ! 140: 0x00000000L, 0x00400010L, 0x20004010L, 0x00004000L, ! 141: 0x00404000L, 0x20004010L, 0x00000010L, 0x20400010L, ! 142: 0x20400010L, 0x00000000L, 0x00404010L, 0x20404000L, ! 143: 0x00004010L, 0x00404000L, 0x20404000L, 0x20000000L, ! 144: 0x20004000L, 0x00000010L, 0x20400010L, 0x00404000L, ! 145: 0x20404010L, 0x00400000L, 0x00004010L, 0x20000010L, ! 146: 0x00400000L, 0x20004000L, 0x20000000L, 0x00004010L, ! 147: 0x20000010L, 0x20404010L, 0x00404000L, 0x20400000L, ! 148: 0x00404010L, 0x20404000L, 0x00000000L, 0x20400010L, ! 149: 0x00000010L, 0x00004000L, 0x20400000L, 0x00404010L, ! 150: 0x00004000L, 0x00400010L, 0x20004010L, 0x00000000L, ! 151: 0x20404000L, 0x20000000L, 0x00400010L, 0x20004010L ! 152: }; ! 153: ! 154: static UINT4 SP7[64] = { ! 155: 0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L, ! 156: 0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L, ! 157: 0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L, ! 158: 0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L, ! 159: 0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L, ! 160: 0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L, ! 161: 0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L, ! 162: 0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L, ! 163: 0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L, ! 164: 0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L, ! 165: 0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L, ! 166: 0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L, ! 167: 0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L, ! 168: 0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L, ! 169: 0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L, ! 170: 0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L ! 171: }; ! 172: ! 173: static UINT4 SP8[64] = { ! 174: 0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L, ! 175: 0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L, ! 176: 0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L, ! 177: 0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L, ! 178: 0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L, ! 179: 0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L, ! 180: 0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L, ! 181: 0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L, ! 182: 0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L, ! 183: 0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L, ! 184: 0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L, ! 185: 0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L, ! 186: 0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L, ! 187: 0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L, ! 188: 0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L, ! 189: 0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L ! 190: }; 1.1 root 191: 1.1.1.2 ! root 192: static void Unpack PROTO_LIST ((unsigned char *, UINT4 *)); ! 193: static void Pack PROTO_LIST ((UINT4 *, unsigned char *)); ! 194: static void DESKey PROTO_LIST ((UINT4 *, unsigned char *, int)); ! 195: static void CookKey PROTO_LIST ((UINT4 *, UINT4 *, int)); ! 196: static void DESFunction PROTO_LIST ((UINT4 *, UINT4 *)); ! 197: ! 198: /* Initialize context. Caller must zeroize the context when finished. 1.1 root 199: */ 200: void DES_CBCInit (context, key, iv, encrypt) 1.1.1.2 ! root 201: DES_CBC_CTX *context; /* context */ ! 202: unsigned char key[8]; /* key */ ! 203: unsigned char iv[8]; /* initializing vector */ 1.1 root 204: int encrypt; /* encrypt flag (1 = encrypt, 0 = decrypt) */ 1.1.1.2 ! root 205: { 1.1 root 206: /* Copy encrypt flag to context. 207: */ 208: context->encrypt = encrypt; 209: 1.1.1.2 ! root 210: /* Pack initializing vector into context. 1.1 root 211: */ 1.1.1.2 ! root 212: Pack (context->iv, iv); 1.1 root 213: 1.1.1.2 ! root 214: /* Save the IV for use in Restart */ ! 215: context->originalIV[0] = context->iv[0]; ! 216: context->originalIV[1] = context->iv[1]; 1.1 root 217: 1.1.1.2 ! root 218: /* Precompute key schedule 1.1 root 219: */ 1.1.1.2 ! root 220: DESKey (context->subkeys, key, encrypt); 1.1 root 221: } 222: 223: /* DES-CBC block update operation. Continues a DES-CBC encryption 224: operation, processing eight-byte message blocks, and updating 225: the context. 226: */ 227: int DES_CBCUpdate (context, output, input, len) 1.1.1.2 ! root 228: DES_CBC_CTX *context; /* context */ 1.1 root 229: unsigned char *output; /* output block */ 230: unsigned char *input; /* input block */ 231: unsigned int len; /* length of input and output blocks */ 232: { 1.1.1.2 ! root 233: UINT4 inputBlock[2], work[2]; ! 234: unsigned int i; 1.1 root 235: 236: if (len % 8) 237: return (RE_LEN); 1.1.1.2 ! root 238: 1.1 root 239: for (i = 0; i < len/8; i++) { 1.1.1.2 ! root 240: Pack (inputBlock, &input[8*i]); ! 241: ! 242: /* Chain if encrypting. ! 243: */ ! 244: if (context->encrypt) { ! 245: work[0] = inputBlock[0] ^ context->iv[0]; ! 246: work[1] = inputBlock[1] ^ context->iv[1]; ! 247: } ! 248: else { ! 249: work[0] = inputBlock[0]; ! 250: work[1] = inputBlock[1]; ! 251: } 1.1 root 252: 1.1.1.2 ! root 253: DESFunction (work, context->subkeys); ! 254: ! 255: /* Chain if decrypting, then update IV. 1.1 root 256: */ 1.1.1.2 ! root 257: if (context->encrypt) { ! 258: context->iv[0] = work[0]; ! 259: context->iv[1] = work[1]; ! 260: } ! 261: else { ! 262: work[0] ^= context->iv[0]; ! 263: work[1] ^= context->iv[1]; ! 264: context->iv[0] = inputBlock[0]; ! 265: context->iv[1] = inputBlock[1]; ! 266: } ! 267: Unpack (&output[8*i], work); ! 268: } 1.1 root 269: 1.1.1.2 ! root 270: /* Zeroize sensitive information. ! 271: */ ! 272: R_memset ((POINTER)inputBlock, 0, sizeof (inputBlock)); ! 273: R_memset ((POINTER)work, 0, sizeof (work)); 1.1 root 274: 1.1.1.2 ! root 275: return (0); ! 276: } ! 277: ! 278: void DES_CBCRestart (context) ! 279: DES_CBC_CTX *context; ! 280: { ! 281: /* Reset to the original IV */ ! 282: context->iv[0] = context->originalIV[0]; ! 283: context->iv[1] = context->originalIV[1]; ! 284: } ! 285: ! 286: /* Initialize context. Caller must zeroize the context when finished. ! 287: The key has the DES key, input whitener and output whitener concatenated. ! 288: */ ! 289: void DESX_CBCInit (context, key, iv, encrypt) ! 290: DESX_CBC_CTX *context; ! 291: unsigned char key[24]; /* DES key and whiteners */ ! 292: unsigned char iv[8]; /* DES initializing vector */ ! 293: int encrypt; /* encrypt flag (1 = encrypt, 0 = decrypt) */ ! 294: { ! 295: /* Copy encrypt flag to context. ! 296: */ ! 297: context->encrypt = encrypt; ! 298: ! 299: /* Pack initializing vector and whiteners into context. ! 300: */ ! 301: Pack (context->iv, iv); ! 302: Pack (context->inputWhitener, key + 8); ! 303: Pack (context->outputWhitener, key + 16); ! 304: ! 305: /* Save the IV for use in Restart */ ! 306: context->originalIV[0] = context->iv[0]; ! 307: context->originalIV[1] = context->iv[1]; ! 308: ! 309: /* Precompute key schedule. ! 310: */ ! 311: DESKey (context->subkeys, key, encrypt); ! 312: } ! 313: ! 314: /* DESX-CBC block update operation. Continues a DESX-CBC encryption ! 315: operation, processing eight-byte message blocks, and updating ! 316: the context. ! 317: */ ! 318: int DESX_CBCUpdate (context, output, input, len) ! 319: DESX_CBC_CTX *context; /* context */ ! 320: unsigned char *output; /* output block */ ! 321: unsigned char *input; /* input block */ ! 322: unsigned int len; /* length of input and output blocks */ ! 323: { ! 324: UINT4 inputBlock[2], work[2]; ! 325: unsigned int i; ! 326: ! 327: if (len % 8) ! 328: return (RE_LEN); ! 329: ! 330: for (i = 0; i < len/8; i++) { ! 331: Pack (inputBlock, &input[8*i]); ! 332: ! 333: /* Chain if encrypting, and xor with whitener. 1.1 root 334: */ 1.1.1.2 ! root 335: if (context->encrypt) { ! 336: work[0] = ! 337: inputBlock[0] ^ context->iv[0] ^ context->inputWhitener[0]; ! 338: work[1] = ! 339: inputBlock[1] ^ context->iv[1] ^ context->inputWhitener[1]; ! 340: } ! 341: else { ! 342: work[0] = inputBlock[0] ^ context->outputWhitener[0]; ! 343: work[1] = inputBlock[1] ^ context->outputWhitener[1]; 1.1 root 344: } 345: 1.1.1.2 ! root 346: DESFunction (work, context->subkeys); 1.1 root 347: 1.1.1.2 ! root 348: /* Xor with whitener, chain if decrypting, then update IV. 1.1 root 349: */ 1.1.1.2 ! root 350: if (context->encrypt) { ! 351: work[0] ^= context->outputWhitener[0]; ! 352: work[1] ^= context->outputWhitener[1]; ! 353: context->iv[0] = work[0]; ! 354: context->iv[1] = work[1]; ! 355: } ! 356: else { ! 357: work[0] ^= context->iv[0] ^ context->inputWhitener[0]; ! 358: work[1] ^= context->iv[1] ^ context->inputWhitener[1]; ! 359: context->iv[0] = inputBlock[0]; ! 360: context->iv[1] = inputBlock[1]; ! 361: } ! 362: Unpack (&output[8*i], work); ! 363: } ! 364: ! 365: /* Zeroize sensitive information. ! 366: */ ! 367: R_memset ((POINTER)inputBlock, 0, sizeof (inputBlock)); ! 368: R_memset ((POINTER)work, 0, sizeof (work)); ! 369: ! 370: return (0); ! 371: } ! 372: ! 373: void DESX_CBCRestart (context) ! 374: DESX_CBC_CTX *context; ! 375: { ! 376: /* Reset to the original IV */ ! 377: context->iv[0] = context->originalIV[0]; ! 378: context->iv[1] = context->originalIV[1]; ! 379: } 1.1 root 380: 1.1.1.2 ! root 381: /* Initialize context. Caller must zeroize the context when finished. ! 382: */ ! 383: void DES3_CBCInit(context, key, iv, encrypt) ! 384: DES3_CBC_CTX *context; /* context */ ! 385: unsigned char key[24]; /* key */ ! 386: unsigned char iv[8]; /* initializing vector */ ! 387: int encrypt; /* encrypt flag (1 = encrypt, 0 = decrypt) */ ! 388: { ! 389: /* Copy encrypt flag to context. ! 390: */ ! 391: context->encrypt = encrypt; ! 392: ! 393: /* Pack initializing vector into context. ! 394: */ ! 395: Pack (context->iv, iv); ! 396: ! 397: /* Save the IV for use in Restart */ ! 398: context->originalIV[0] = context->iv[0]; ! 399: context->originalIV[1] = context->iv[1]; ! 400: ! 401: /* Precompute key schedules. ! 402: */ ! 403: DESKey (context->subkeys[0], encrypt ? key : &key[16], encrypt); ! 404: DESKey (context->subkeys[1], &key[8], !encrypt); ! 405: DESKey (context->subkeys[2], encrypt ? &key[16] : key, encrypt); ! 406: } ! 407: ! 408: int DES3_CBCUpdate (context, output, input, len) ! 409: DES3_CBC_CTX *context; /* context */ ! 410: unsigned char *output; /* output block */ ! 411: unsigned char *input; /* input block */ ! 412: unsigned int len; /* length of input and output blocks */ ! 413: { ! 414: UINT4 inputBlock[2], work[2]; ! 415: unsigned int i; 1.1 root 416: 1.1.1.2 ! root 417: if (len % 8) ! 418: return (RE_LEN); ! 419: ! 420: for (i = 0; i < len/8; i++) { ! 421: Pack (inputBlock, &input[8*i]); ! 422: ! 423: /* Chain if encrypting. 1.1 root 424: */ 1.1.1.2 ! root 425: if (context->encrypt) { ! 426: work[0] = inputBlock[0] ^ context->iv[0]; ! 427: work[1] = inputBlock[1] ^ context->iv[1]; ! 428: } ! 429: else { ! 430: work[0] = inputBlock[0]; ! 431: work[1] = inputBlock[1]; ! 432: } ! 433: ! 434: DESFunction (work, context->subkeys[0]); ! 435: DESFunction (work, context->subkeys[1]); ! 436: DESFunction (work, context->subkeys[2]); ! 437: ! 438: /* Chain if decrypting, then update IV. ! 439: */ ! 440: if (context->encrypt) { ! 441: context->iv[0] = work[0]; ! 442: context->iv[1] = work[1]; ! 443: } ! 444: else { ! 445: work[0] ^= context->iv[0]; ! 446: work[1] ^= context->iv[1]; ! 447: context->iv[0] = inputBlock[0]; ! 448: context->iv[1] = inputBlock[1]; ! 449: } ! 450: Unpack (&output[8*i], work); 1.1 root 451: } 452: 453: /* Zeroize sensitive information. 454: */ 1.1.1.2 ! root 455: R_memset ((POINTER)inputBlock, 0, sizeof (inputBlock)); ! 456: R_memset ((POINTER)work, 0, sizeof (work)); 1.1 root 457: 458: return (0); 459: } 460: 1.1.1.2 ! root 461: void DES3_CBCRestart (context) ! 462: DES3_CBC_CTX *context; ! 463: { ! 464: /* Reset to the original IV */ ! 465: context->iv[0] = context->originalIV[0]; ! 466: context->iv[1] = context->originalIV[1]; ! 467: } ! 468: ! 469: static void Pack (into, outof) ! 470: UINT4 *into; ! 471: unsigned char *outof; 1.1 root 472: { 1.1.1.2 ! root 473: *into = (*outof++ & 0xffL) << 24; ! 474: *into |= (*outof++ & 0xffL) << 16; ! 475: *into |= (*outof++ & 0xffL) << 8; ! 476: *into++ |= (*outof++ & 0xffL); ! 477: *into = (*outof++ & 0xffL) << 24; ! 478: *into |= (*outof++ & 0xffL) << 16; ! 479: *into |= (*outof++ & 0xffL) << 8; ! 480: *into |= (*outof & 0xffL); 1.1 root 481: } 482: 1.1.1.2 ! root 483: static void Unpack (into, outof) ! 484: unsigned char *into; ! 485: UINT4 *outof; 1.1 root 486: { 1.1.1.2 ! root 487: *into++ = (unsigned char)((*outof >> 24) & 0xffL); ! 488: *into++ = (unsigned char)((*outof >> 16) & 0xffL); ! 489: *into++ = (unsigned char)((*outof >> 8) & 0xffL); ! 490: *into++ = (unsigned char)( *outof++ & 0xffL); ! 491: *into++ = (unsigned char)((*outof >> 24) & 0xffL); ! 492: *into++ = (unsigned char)((*outof >> 16) & 0xffL); ! 493: *into++ = (unsigned char)((*outof >> 8) & 0xffL); ! 494: *into = (unsigned char)( *outof & 0xffL); ! 495: } 1.1 root 496: 1.1.1.2 ! root 497: static void DESKey (subkeys, key, encrypt) ! 498: UINT4 subkeys[32]; ! 499: unsigned char key[8]; ! 500: int encrypt; ! 501: { ! 502: UINT4 kn[32]; ! 503: int i, j, l, m, n; ! 504: unsigned char pc1m[56], pcr[56]; ! 505: ! 506: for (j = 0; j < 56; j++) { ! 507: l = PC1[j]; ! 508: m = l & 07; ! 509: pc1m[j] = (unsigned char)((key[l >> 3] & BYTE_BIT[m]) ? 1 : 0); 1.1 root 510: } 1.1.1.2 ! root 511: for (i = 0; i < 16; i++) { ! 512: m = i << 1; ! 513: n = m + 1; ! 514: kn[m] = kn[n] = 0L; ! 515: for (j = 0; j < 28; j++) { ! 516: l = j + TOTAL_ROTATIONS[i]; ! 517: if (l < 28) ! 518: pcr[j] = pc1m[l]; ! 519: else ! 520: pcr[j] = pc1m[l - 28]; ! 521: } ! 522: for (j = 28; j < 56; j++) { ! 523: l = j + TOTAL_ROTATIONS[i]; ! 524: if (l < 56) ! 525: pcr[j] = pc1m[l]; ! 526: else ! 527: pcr[j] = pc1m[l - 28]; ! 528: } ! 529: for (j = 0; j < 24; j++) { ! 530: if (pcr[PC2[j]]) ! 531: kn[m] |= BIG_BYTE[j]; ! 532: if (pcr[PC2[j+24]]) ! 533: kn[n] |= BIG_BYTE[j]; ! 534: } ! 535: } ! 536: CookKey (subkeys, kn, encrypt); ! 537: ! 538: /* Zeroize sensitive information. ! 539: */ ! 540: R_memset ((POINTER)pc1m, 0, sizeof (pc1m)); ! 541: R_memset ((POINTER)pcr, 0, sizeof (pcr)); ! 542: R_memset ((POINTER)kn, 0, sizeof (kn)); 1.1 root 543: } 544: 1.1.1.2 ! root 545: static void CookKey (subkeys, kn, encrypt) ! 546: UINT4 *subkeys; ! 547: UINT4 *kn; ! 548: int encrypt; ! 549: { ! 550: UINT4 *cooked, *raw0, *raw1; ! 551: int increment; ! 552: unsigned int i; ! 553: ! 554: raw1 = kn; ! 555: cooked = encrypt ? subkeys : &subkeys[30]; ! 556: increment = encrypt ? 1 : -3; ! 557: ! 558: for (i = 0; i < 16; i++, raw1++) { ! 559: raw0 = raw1++; ! 560: *cooked = (*raw0 & 0x00fc0000L) << 6; ! 561: *cooked |= (*raw0 & 0x00000fc0L) << 10; ! 562: *cooked |= (*raw1 & 0x00fc0000L) >> 10; ! 563: *cooked++ |= (*raw1 & 0x00000fc0L) >> 6; ! 564: *cooked = (*raw0 & 0x0003f000L) << 12; ! 565: *cooked |= (*raw0 & 0x0000003fL) << 16; ! 566: *cooked |= (*raw1 & 0x0003f000L) >> 4; ! 567: *cooked |= (*raw1 & 0x0000003fL); ! 568: cooked += increment; ! 569: } ! 570: } ! 571: ! 572: static void DESFunction (block, subkeys) ! 573: UINT4 *block; ! 574: UINT4 *subkeys; ! 575: { ! 576: register UINT4 fval, work, right, left; ! 577: register int round; ! 578: ! 579: left = block[0]; ! 580: right = block[1]; ! 581: work = ((left >> 4) ^ right) & 0x0f0f0f0fL; ! 582: right ^= work; ! 583: left ^= (work << 4); ! 584: work = ((left >> 16) ^ right) & 0x0000ffffL; ! 585: right ^= work; ! 586: left ^= (work << 16); ! 587: work = ((right >> 2) ^ left) & 0x33333333L; ! 588: left ^= work; ! 589: right ^= (work << 2); ! 590: work = ((right >> 8) ^ left) & 0x00ff00ffL; ! 591: left ^= work; ! 592: right ^= (work << 8); ! 593: right = ((right << 1) | ((right >> 31) & 1L)) & 0xffffffffL; ! 594: work = (left ^ right) & 0xaaaaaaaaL; ! 595: left ^= work; ! 596: right ^= work; ! 597: left = ((left << 1) | ((left >> 31) & 1L)) & 0xffffffffL; ! 598: ! 599: for (round = 0; round < 8; round++) { ! 600: work = (right << 28) | (right >> 4); ! 601: work ^= *subkeys++; ! 602: fval = SP7[ work & 0x3fL]; ! 603: fval |= SP5[(work >> 8) & 0x3fL]; ! 604: fval |= SP3[(work >> 16) & 0x3fL]; ! 605: fval |= SP1[(work >> 24) & 0x3fL]; ! 606: work = right ^ *subkeys++; ! 607: fval |= SP8[ work & 0x3fL]; ! 608: fval |= SP6[(work >> 8) & 0x3fL]; ! 609: fval |= SP4[(work >> 16) & 0x3fL]; ! 610: fval |= SP2[(work >> 24) & 0x3fL]; ! 611: left ^= fval; ! 612: work = (left << 28) | (left >> 4); ! 613: work ^= *subkeys++; ! 614: fval = SP7[ work & 0x3fL]; ! 615: fval |= SP5[(work >> 8) & 0x3fL]; ! 616: fval |= SP3[(work >> 16) & 0x3fL]; ! 617: fval |= SP1[(work >> 24) & 0x3fL]; ! 618: work = left ^ *subkeys++; ! 619: fval |= SP8[ work & 0x3fL]; ! 620: fval |= SP6[(work >> 8) & 0x3fL]; ! 621: fval |= SP4[(work >> 16) & 0x3fL]; ! 622: fval |= SP2[(work >> 24) & 0x3fL]; ! 623: right ^= fval; 1.1 root 624: } 1.1.1.2 ! root 625: ! 626: right = (right << 31) | (right >> 1); ! 627: work = (left ^ right) & 0xaaaaaaaaL; ! 628: left ^= work; ! 629: right ^= work; ! 630: left = (left << 31) | (left >> 1); ! 631: work = ((left >> 8) ^ right) & 0x00ff00ffL; ! 632: right ^= work; ! 633: left ^= (work << 8); ! 634: work = ((left >> 2) ^ right) & 0x33333333L; ! 635: right ^= work; ! 636: left ^= (work << 2); ! 637: work = ((right >> 16) ^ left) & 0x0000ffffL; ! 638: left ^= work; ! 639: right ^= (work << 16); ! 640: work = ((right >> 4) ^ left) & 0x0f0f0f0fL; ! 641: left ^= work; ! 642: right ^= (work << 4); ! 643: *block++ = right; ! 644: *block = left; 1.1 root 645: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.