1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved. 3*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 4*7c478bd9Sstevel@tonic-gate */ 5*7c478bd9Sstevel@tonic-gate 6*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 7*7c478bd9Sstevel@tonic-gate 8*7c478bd9Sstevel@tonic-gate /* 9*7c478bd9Sstevel@tonic-gate * lib/crypto/crc32/crc.c 10*7c478bd9Sstevel@tonic-gate * 11*7c478bd9Sstevel@tonic-gate * Copyright 1990 by the Massachusetts Institute of Technology. 12*7c478bd9Sstevel@tonic-gate * All Rights Reserved. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may 15*7c478bd9Sstevel@tonic-gate * require a specific license from the United States Government. 16*7c478bd9Sstevel@tonic-gate * It is the responsibility of any person or organization contemplating 17*7c478bd9Sstevel@tonic-gate * export to obtain such a license before exporting. 18*7c478bd9Sstevel@tonic-gate * 19*7c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 20*7c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and 21*7c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright 22*7c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and 23*7c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that 24*7c478bd9Sstevel@tonic-gate * the name of M.I.T. not be used in advertising or publicity pertaining 25*7c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior 26*7c478bd9Sstevel@tonic-gate * permission. M.I.T. makes no representations about the suitability of 27*7c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express 28*7c478bd9Sstevel@tonic-gate * or implied warranty. 29*7c478bd9Sstevel@tonic-gate * 30*7c478bd9Sstevel@tonic-gate * 31*7c478bd9Sstevel@tonic-gate * CRC-32/AUTODIN-II routines 32*7c478bd9Sstevel@tonic-gate */ 33*7c478bd9Sstevel@tonic-gate 34*7c478bd9Sstevel@tonic-gate #include <k5-int.h> 35*7c478bd9Sstevel@tonic-gate #include <crc-32.h> 36*7c478bd9Sstevel@tonic-gate 37*7c478bd9Sstevel@tonic-gate /* This table and block of comments are taken from code labeled: */ 38*7c478bd9Sstevel@tonic-gate /* 39*7c478bd9Sstevel@tonic-gate * Copyright (C) 1986 Gary S. Brown. You may use this program, or 40*7c478bd9Sstevel@tonic-gate * code or tables extracted from it, as desired without restriction. 41*7c478bd9Sstevel@tonic-gate */ 42*7c478bd9Sstevel@tonic-gate 43*7c478bd9Sstevel@tonic-gate /* First, the polynomial itself and its table of feedback terms. The */ 44*7c478bd9Sstevel@tonic-gate /* polynomial is */ 45*7c478bd9Sstevel@tonic-gate /* X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0 */ 46*7c478bd9Sstevel@tonic-gate /* Note that we take it "backwards" and put the highest-order term in */ 47*7c478bd9Sstevel@tonic-gate /* the lowest-order bit. The X^32 term is "implied"; the LSB is the */ 48*7c478bd9Sstevel@tonic-gate /* X^31 term, etc. The X^0 term (usually shown as "+1") results in */ 49*7c478bd9Sstevel@tonic-gate /* the MSB being 1. */ 50*7c478bd9Sstevel@tonic-gate 51*7c478bd9Sstevel@tonic-gate /* Note that the usual hardware shift register implementation, which */ 52*7c478bd9Sstevel@tonic-gate /* is what we're using (we're merely optimizing it by doing eight-bit */ 53*7c478bd9Sstevel@tonic-gate /* chunks at a time) shifts bits into the lowest-order term. In our */ 54*7c478bd9Sstevel@tonic-gate /* implementation, that means shifting towards the right. Why do we */ 55*7c478bd9Sstevel@tonic-gate /* do it this way? Because the calculated CRC must be transmitted in */ 56*7c478bd9Sstevel@tonic-gate /* order from highest-order term to lowest-order term. UARTs transmit */ 57*7c478bd9Sstevel@tonic-gate /* characters in order from LSB to MSB. By storing the CRC this way, */ 58*7c478bd9Sstevel@tonic-gate /* we hand it to the UART in the order low-byte to high-byte; the UART */ 59*7c478bd9Sstevel@tonic-gate /* sends each low-bit to hight-bit; and the result is transmission bit */ 60*7c478bd9Sstevel@tonic-gate /* by bit from highest- to lowest-order term without requiring any bit */ 61*7c478bd9Sstevel@tonic-gate /* shuffling on our part. Reception works similarly. */ 62*7c478bd9Sstevel@tonic-gate 63*7c478bd9Sstevel@tonic-gate /* The feedback terms table consists of 256, 32-bit entries. Notes: */ 64*7c478bd9Sstevel@tonic-gate /* */ 65*7c478bd9Sstevel@tonic-gate /* 1. The table can be generated at runtime if desired; code to do so */ 66*7c478bd9Sstevel@tonic-gate /* is shown later. It might not be obvious, but the feedback */ 67*7c478bd9Sstevel@tonic-gate /* terms simply represent the results of eight shift/xor opera- */ 68*7c478bd9Sstevel@tonic-gate /* tions for all combinations of data and CRC register values. */ 69*7c478bd9Sstevel@tonic-gate /* */ 70*7c478bd9Sstevel@tonic-gate /* 2. The CRC accumulation logic is the same for all CRC polynomials, */ 71*7c478bd9Sstevel@tonic-gate /* be they sixteen or thirty-two bits wide. You simply choose the */ 72*7c478bd9Sstevel@tonic-gate /* appropriate table. Alternatively, because the table can be */ 73*7c478bd9Sstevel@tonic-gate /* generated at runtime, you can start by generating the table for */ 74*7c478bd9Sstevel@tonic-gate /* the polynomial in question and use exactly the same "updcrc", */ 75*7c478bd9Sstevel@tonic-gate /* if your application needn't simultaneously handle two CRC */ 76*7c478bd9Sstevel@tonic-gate /* polynomials. (Note, however, that XMODEM is strange.) */ 77*7c478bd9Sstevel@tonic-gate /* */ 78*7c478bd9Sstevel@tonic-gate /* 3. For 16-bit CRCs, the table entries need be only 16 bits wide; */ 79*7c478bd9Sstevel@tonic-gate /* of course, 32-bit entries work OK if the high 16 bits are zero. */ 80*7c478bd9Sstevel@tonic-gate /* */ 81*7c478bd9Sstevel@tonic-gate /* 4. The values must be right-shifted by eight bits by the "updcrc" */ 82*7c478bd9Sstevel@tonic-gate /* logic; the shift must be unsigned (bring in zeroes). On some */ 83*7c478bd9Sstevel@tonic-gate /* hardware you could probably optimize the shift in assembler by */ 84*7c478bd9Sstevel@tonic-gate /* using byte-swap instructions. */ 85*7c478bd9Sstevel@tonic-gate 86*7c478bd9Sstevel@tonic-gate static uint32_t const crc_table[256] = { 87*7c478bd9Sstevel@tonic-gate 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 88*7c478bd9Sstevel@tonic-gate 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 89*7c478bd9Sstevel@tonic-gate 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 90*7c478bd9Sstevel@tonic-gate 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 91*7c478bd9Sstevel@tonic-gate 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 92*7c478bd9Sstevel@tonic-gate 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 93*7c478bd9Sstevel@tonic-gate 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 94*7c478bd9Sstevel@tonic-gate 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 95*7c478bd9Sstevel@tonic-gate 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 96*7c478bd9Sstevel@tonic-gate 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 97*7c478bd9Sstevel@tonic-gate 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 98*7c478bd9Sstevel@tonic-gate 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 99*7c478bd9Sstevel@tonic-gate 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 100*7c478bd9Sstevel@tonic-gate 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 101*7c478bd9Sstevel@tonic-gate 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 102*7c478bd9Sstevel@tonic-gate 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 103*7c478bd9Sstevel@tonic-gate 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 104*7c478bd9Sstevel@tonic-gate 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 105*7c478bd9Sstevel@tonic-gate 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 106*7c478bd9Sstevel@tonic-gate 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 107*7c478bd9Sstevel@tonic-gate 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 108*7c478bd9Sstevel@tonic-gate 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 109*7c478bd9Sstevel@tonic-gate 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 110*7c478bd9Sstevel@tonic-gate 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 111*7c478bd9Sstevel@tonic-gate 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 112*7c478bd9Sstevel@tonic-gate 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 113*7c478bd9Sstevel@tonic-gate 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 114*7c478bd9Sstevel@tonic-gate 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 115*7c478bd9Sstevel@tonic-gate 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 116*7c478bd9Sstevel@tonic-gate 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 117*7c478bd9Sstevel@tonic-gate 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 118*7c478bd9Sstevel@tonic-gate 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 119*7c478bd9Sstevel@tonic-gate 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 120*7c478bd9Sstevel@tonic-gate 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 121*7c478bd9Sstevel@tonic-gate 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 122*7c478bd9Sstevel@tonic-gate 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 123*7c478bd9Sstevel@tonic-gate 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 124*7c478bd9Sstevel@tonic-gate 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 125*7c478bd9Sstevel@tonic-gate 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 126*7c478bd9Sstevel@tonic-gate 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 127*7c478bd9Sstevel@tonic-gate 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 128*7c478bd9Sstevel@tonic-gate 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 129*7c478bd9Sstevel@tonic-gate 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 130*7c478bd9Sstevel@tonic-gate 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 131*7c478bd9Sstevel@tonic-gate 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 132*7c478bd9Sstevel@tonic-gate 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 133*7c478bd9Sstevel@tonic-gate 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 134*7c478bd9Sstevel@tonic-gate 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 135*7c478bd9Sstevel@tonic-gate 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 136*7c478bd9Sstevel@tonic-gate 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 137*7c478bd9Sstevel@tonic-gate 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 138*7c478bd9Sstevel@tonic-gate 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 139*7c478bd9Sstevel@tonic-gate 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 140*7c478bd9Sstevel@tonic-gate 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 141*7c478bd9Sstevel@tonic-gate 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 142*7c478bd9Sstevel@tonic-gate 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 143*7c478bd9Sstevel@tonic-gate 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 144*7c478bd9Sstevel@tonic-gate 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 145*7c478bd9Sstevel@tonic-gate 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 146*7c478bd9Sstevel@tonic-gate 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 147*7c478bd9Sstevel@tonic-gate 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 148*7c478bd9Sstevel@tonic-gate 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 149*7c478bd9Sstevel@tonic-gate 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 150*7c478bd9Sstevel@tonic-gate 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d 151*7c478bd9Sstevel@tonic-gate }; 152*7c478bd9Sstevel@tonic-gate 153*7c478bd9Sstevel@tonic-gate /* Windows needs to these prototypes for crc32_cksumtable_entry below */ 154*7c478bd9Sstevel@tonic-gate 155*7c478bd9Sstevel@tonic-gate static krb5_error_code 156*7c478bd9Sstevel@tonic-gate crc32_sum_func PROTOTYPE(( 157*7c478bd9Sstevel@tonic-gate krb5_const krb5_pointer in, 158*7c478bd9Sstevel@tonic-gate krb5_const size_t in_length, 159*7c478bd9Sstevel@tonic-gate krb5_const krb5_pointer seed, 160*7c478bd9Sstevel@tonic-gate krb5_const size_t seed_length, 161*7c478bd9Sstevel@tonic-gate krb5_checksum FAR *outcksum)); 162*7c478bd9Sstevel@tonic-gate 163*7c478bd9Sstevel@tonic-gate static krb5_error_code 164*7c478bd9Sstevel@tonic-gate crc32_verify_func PROTOTYPE(( 165*7c478bd9Sstevel@tonic-gate krb5_const krb5_checksum FAR *cksum, 166*7c478bd9Sstevel@tonic-gate krb5_const krb5_pointer in, 167*7c478bd9Sstevel@tonic-gate krb5_const size_t in_length, 168*7c478bd9Sstevel@tonic-gate krb5_const krb5_pointer seed, 169*7c478bd9Sstevel@tonic-gate krb5_const size_t seed_length)); 170*7c478bd9Sstevel@tonic-gate 171*7c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 172*7c478bd9Sstevel@tonic-gate static krb5_error_code 173*7c478bd9Sstevel@tonic-gate crc32_sum_func(in, in_length, seed, seed_length, outcksum) 174*7c478bd9Sstevel@tonic-gate krb5_const krb5_pointer in; 175*7c478bd9Sstevel@tonic-gate krb5_const size_t in_length; 176*7c478bd9Sstevel@tonic-gate krb5_const krb5_pointer seed; 177*7c478bd9Sstevel@tonic-gate krb5_const size_t seed_length; 178*7c478bd9Sstevel@tonic-gate krb5_checksum FAR *outcksum; 179*7c478bd9Sstevel@tonic-gate { 180*7c478bd9Sstevel@tonic-gate register u_char *data; 181*7c478bd9Sstevel@tonic-gate register u_long c = 0; 182*7c478bd9Sstevel@tonic-gate register int idx; 183*7c478bd9Sstevel@tonic-gate size_t i; 184*7c478bd9Sstevel@tonic-gate 185*7c478bd9Sstevel@tonic-gate if (outcksum->length < CRC32_CKSUM_LENGTH) 186*7c478bd9Sstevel@tonic-gate return KRB5_BAD_MSIZE; 187*7c478bd9Sstevel@tonic-gate 188*7c478bd9Sstevel@tonic-gate data = (u_char *)in; 189*7c478bd9Sstevel@tonic-gate for (i = 0; i < in_length; i++) { 190*7c478bd9Sstevel@tonic-gate idx = (int) (data[i] ^ c); 191*7c478bd9Sstevel@tonic-gate idx &= 0xff; 192*7c478bd9Sstevel@tonic-gate c >>= 8; 193*7c478bd9Sstevel@tonic-gate c ^= (u_long) crc_table[idx]; 194*7c478bd9Sstevel@tonic-gate } 195*7c478bd9Sstevel@tonic-gate /* c now holds the result */ 196*7c478bd9Sstevel@tonic-gate outcksum->checksum_type = CKSUMTYPE_CRC32; 197*7c478bd9Sstevel@tonic-gate outcksum->length = CRC32_CKSUM_LENGTH; 198*7c478bd9Sstevel@tonic-gate outcksum->contents[0] = (krb5_octet) (c & 0xff); 199*7c478bd9Sstevel@tonic-gate outcksum->contents[1] = (krb5_octet) ((c >> 8) & 0xff); 200*7c478bd9Sstevel@tonic-gate outcksum->contents[2] = (krb5_octet) ((c >> 16) & 0xff); 201*7c478bd9Sstevel@tonic-gate outcksum->contents[3] = (krb5_octet) ((c >> 24) & 0xff); 202*7c478bd9Sstevel@tonic-gate return 0; 203*7c478bd9Sstevel@tonic-gate } 204*7c478bd9Sstevel@tonic-gate 205*7c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 206*7c478bd9Sstevel@tonic-gate static krb5_error_code 207*7c478bd9Sstevel@tonic-gate crc32_verify_func(cksum, in, in_length, seed, seed_length) 208*7c478bd9Sstevel@tonic-gate krb5_const krb5_checksum FAR *cksum; 209*7c478bd9Sstevel@tonic-gate krb5_const krb5_pointer in; 210*7c478bd9Sstevel@tonic-gate krb5_const size_t in_length; 211*7c478bd9Sstevel@tonic-gate krb5_const krb5_pointer seed; 212*7c478bd9Sstevel@tonic-gate krb5_const size_t seed_length; 213*7c478bd9Sstevel@tonic-gate { 214*7c478bd9Sstevel@tonic-gate register u_char *data; 215*7c478bd9Sstevel@tonic-gate register u_long c = 0; 216*7c478bd9Sstevel@tonic-gate register int idx; 217*7c478bd9Sstevel@tonic-gate size_t i; 218*7c478bd9Sstevel@tonic-gate krb5_error_code retval; 219*7c478bd9Sstevel@tonic-gate 220*7c478bd9Sstevel@tonic-gate retval = 0; 221*7c478bd9Sstevel@tonic-gate if (cksum->checksum_type == CKSUMTYPE_CRC32) { 222*7c478bd9Sstevel@tonic-gate if (cksum->length == CRC32_CKSUM_LENGTH) { 223*7c478bd9Sstevel@tonic-gate data = (u_char *)in; 224*7c478bd9Sstevel@tonic-gate for (i = 0; i < in_length; i++) { 225*7c478bd9Sstevel@tonic-gate idx = (int) (data[i] ^ c); 226*7c478bd9Sstevel@tonic-gate idx &= 0xff; 227*7c478bd9Sstevel@tonic-gate c >>= 8; 228*7c478bd9Sstevel@tonic-gate c ^= (u_long) crc_table[idx]; 229*7c478bd9Sstevel@tonic-gate } 230*7c478bd9Sstevel@tonic-gate if ((cksum->contents[0] != (krb5_octet) (c & 0xff)) || 231*7c478bd9Sstevel@tonic-gate (cksum->contents[1] != (krb5_octet) ((c >> 8) & 0xff)) || 232*7c478bd9Sstevel@tonic-gate (cksum->contents[2] != (krb5_octet) ((c >> 16) & 0xff)) || 233*7c478bd9Sstevel@tonic-gate (cksum->contents[3] != (krb5_octet) ((c >> 24) & 0xff))) 234*7c478bd9Sstevel@tonic-gate retval = KRB5KRB_AP_ERR_BAD_INTEGRITY; 235*7c478bd9Sstevel@tonic-gate } 236*7c478bd9Sstevel@tonic-gate else 237*7c478bd9Sstevel@tonic-gate retval = KRB5KRB_AP_ERR_BAD_INTEGRITY; 238*7c478bd9Sstevel@tonic-gate } 239*7c478bd9Sstevel@tonic-gate else 240*7c478bd9Sstevel@tonic-gate retval = KRB5KRB_AP_ERR_INAPP_CKSUM; 241*7c478bd9Sstevel@tonic-gate return(retval); 242*7c478bd9Sstevel@tonic-gate } 243*7c478bd9Sstevel@tonic-gate 244