132 lines
7.2 KiB
C
132 lines
7.2 KiB
C
// SPDX-FileCopyrightText: 2009 Victor Mu~noz <vmunoz@ingenieria-inversa.cl>
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// SPDX-License-Identifier: LGPL-3.0-only
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// some definitions and test cases borrowed from http://www.nightmare.com/~ryb/code/CrcMoose.py (Ray Burr)
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#include "crca.h"
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void crc_init_custom(RzCrc *ctx, utcrc crc, ut32 size, int reflect, utcrc poly, utcrc xout) {
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ctx->crc = crc;
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ctx->size = size;
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ctx->reflect = reflect;
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ctx->poly = poly;
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ctx->xout = xout;
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}
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void crc_update(RzCrc *ctx, const ut8 *data, ut32 sz) {
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utcrc crc, d;
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int i, j;
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crc = ctx->crc;
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for (i = 0; i < sz; i++) {
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d = data[i];
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if (ctx->reflect) {
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for (j = 0; j < 4; j++) {
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if (((d >> j) ^ (d >> (7 - j))) & 1) {
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d ^= (1 << j) ^ (1 << (7 - j));
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}
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}
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}
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crc ^= d << (ctx->size - 8);
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for (j = 0; j < 8; j++) {
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crc = ((crc >> (ctx->size - 1)) & 1 ? ctx->poly : 0) ^ (crc << 1);
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}
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}
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ctx->crc = crc;
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}
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void crc_final(RzCrc *ctx, utcrc *r) {
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utcrc crc;
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int i;
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crc = ctx->crc;
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crc &= (((UTCRC_C(1) << (ctx->size - 1)) - 1) << 1) | 1;
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if (ctx->reflect) {
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for (i = 0; i < (ctx->size >> 1); i++) {
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if (((crc >> i) ^ (crc >> (ctx->size - 1 - i))) & 1) {
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crc ^= (UTCRC_C(1) << i) ^ (UTCRC_C(1) << (ctx->size - 1 - i));
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}
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}
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}
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*r = crc ^ ctx->xout;
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}
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/* preset initializer to provide compatibility */
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#define CRC_PRESET(crc, size, reflect, poly, xout) \
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{ UTCRC_C(crc), (size), (reflect), UTCRC_C(poly), UTCRC_C(xout) }
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/* NOTE: Run `rz-hash -a <algo> -s 123456789` to test CRC. */
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RzCrc crc_presets[] = {
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CRC_PRESET(0x00, 8, 0, 0x07, 0x00), // CRC-8-SMBUS, test vector for "1234567892: f4
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CRC_PRESET(0xFF, 8, 0, 0x9B, 0x00), // CRC-8/CDMA2000, test vector for "123456789": 0xda
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CRC_PRESET(0x00, 8, 1, 0x39, 0x00), // CRC-8/DARC, test vector for "123456789": 0x15
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CRC_PRESET(0x00, 8, 0, 0xD5, 0x00), // CRC-8/DVB-S2, test vector for "123456789": 0xbc
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CRC_PRESET(0xFF, 8, 1, 0x1D, 0x00), // CRC-8/EBU, test vector for "123456789": 0x97
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CRC_PRESET(0xFD, 8, 0, 0x1D, 0x00), // CRC-8/I-CODE, test vector for "123456789": 0x7e
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CRC_PRESET(0x00, 8, 0, 0x07, 0x55), // CRC-8/ITU, test vector for "123456789": 0xa1
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CRC_PRESET(0x00, 8, 1, 0x31, 0x00), // CRC-8/MAXIM, test vector for "123456789": 0xa1
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CRC_PRESET(0xFF, 8, 1, 0x07, 0x00), // CRC-8/ROHC, test vector for "123456789": 0xd0
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CRC_PRESET(0x00, 8, 1, 0x9B, 0x00), // CRC-8/WCDMA, test vector for "123456789": 0x25
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CRC_PRESET(0x0000, 15, 0, 0x4599, 0x0000), // CRC-15-CAN, test vector for "1234567892: 059e
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CRC_PRESET(0x0000, 16, 1, 0x8005, 0x0000), // CRC-16-IBM (CRC-16/ARC), test vector for "1234567892: bb3d
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CRC_PRESET(0xFFFF, 16, 0, 0x1021, 0x0000), // CRC-16-CITT (CRC-16/CCITT-FALSE), test vector for "1234567892: 29b1
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CRC_PRESET(0xFFFF, 16, 1, 0x8005, 0xFFFF), // CRC-16-USB, test vector for "1234567892: b4c8
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CRC_PRESET(0xFFFF, 16, 1, 0x1021, 0xFFFF), // CRC-HDLC, test vector for "1234567892: 906e
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CRC_PRESET(0x1D0F, 16, 0, 0x1021, 0x0000), // CRC-16/AUG-CCITT, test vector for "123456789": 0xe5cc
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CRC_PRESET(0x0000, 16, 0, 0x8005, 0x0000), // CRC-16/BUYPASS, test vector for "123456789": 0xfee8
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CRC_PRESET(0xFFFF, 16, 0, 0xC867, 0x0000), // CRC-16/CDMA2000, test vector for "123456789": 0x4c06
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CRC_PRESET(0x800D, 16, 0, 0x8005, 0x0000), // CRC-16/DDS110, test vector for "123456789": 0x9ecf
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CRC_PRESET(0x0000, 16, 0, 0x0589, 0x0001), // CRC-16/DECT-R, test vector for "123456789": 0x007e
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CRC_PRESET(0x0000, 16, 0, 0x0589, 0x0000), // CRC-16/DECT-X, test vector for "123456789": 0x007f
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CRC_PRESET(0x0000, 16, 1, 0x3D65, 0xFFFF), // CRC-16/DNP, test vector for "123456789": 0xea82
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CRC_PRESET(0x0000, 16, 0, 0x3D65, 0xFFFF), // CRC-16/EN-13757, test vector for "123456789": 0xc2b7
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CRC_PRESET(0xFFFF, 16, 0, 0x1021, 0xFFFF), // CRC-16/GENIBUS, test vector for "123456789": 0xd64e
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CRC_PRESET(0x0000, 16, 1, 0x8005, 0xFFFF), // CRC-16/MAXIM, test vector for "123456789": 0x44c2
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CRC_PRESET(0xFFFF, 16, 1, 0x1021, 0x0000), // CRC-16/MCRF4XX, test vector for "123456789": 0x6f91
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CRC_PRESET(0xB2AA, 16, 1, 0x1021, 0x0000), // CRC-16/RIELLO, test vector for "123456789": 0x63d0
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CRC_PRESET(0x0000, 16, 0, 0x8BB7, 0x0000), // CRC-16/T10-DIF, test vector for "123456789": 0xd0db
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CRC_PRESET(0x0000, 16, 0, 0xA097, 0x0000), // CRC-16/TELEDISK, test vector for "123456789": 0x0fb3
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CRC_PRESET(0x89EC, 16, 1, 0x1021, 0x0000), // CRC-16/TMS37157, test vector for "123456789": 0x26b1
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CRC_PRESET(0xC6C6, 16, 1, 0x1021, 0x0000), // CRC-A, test vector for "123456789": 0xbf05
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CRC_PRESET(0x0000, 16, 1, 0x1021, 0x0000), // CRC-16/KERMIT, test vector for "123456789": 0x2189
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CRC_PRESET(0xFFFF, 16, 1, 0x8005, 0x0000), // CRC-16/MODBUS, test vector for "123456789": 0x4b37
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CRC_PRESET(0xFFFF, 16, 1, 0x1021, 0xFFFF), // CRC-16/X-25, test vector for "123456789": 0x906e
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CRC_PRESET(0x0000, 16, 0, 0x1021, 0x0000), // CRC-16/XMODEM, test vector for "123456789": 0x31c3
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CRC_PRESET(0xB704CE, 24, 0, 0x864CFB, 0x000000), // CRC-24, test vector for "1234567892: 21cf02
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CRC_PRESET(0xFFFFFFFF, 32, 1, 0x04C11DB7, 0xFFFFFFFF), // CRC-32, test vector for "1234567892: cbf43926
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CRC_PRESET(0x00000000, 32, 0, 0x80000011, 0x00000000), // CRC-32-ECMA-267 (EDC for DVD sectors), test vector for "1234567892: b27ce117
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CRC_PRESET(0xFFFFFFFF, 32, 1, 0x1EDC6F41, 0xFFFFFFFF), // CRC-32C, test vector for "1234567892: e3069283
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CRC_PRESET(0xFFFFFFFF, 32, 0, 0x04C11DB7, 0xFFFFFFFF), // CRC-32/BZIP2, test vector for "123456789": 0xfc891918
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CRC_PRESET(0xFFFFFFFF, 32, 1, 0xA833982B, 0xFFFFFFFF), // CRC-32D, test vector for "123456789": 0x87315576
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CRC_PRESET(0xFFFFFFFF, 32, 0, 0x04C11DB7, 0x00000000), // CRC-32/MPEG2, test vector for "123456789": 0x0376e6e7
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CRC_PRESET(0x00000000, 32, 0, 0x04C11DB7, 0xFFFFFFFF), // CRC-32/POSIX, test vector for "123456789": 0x765e7680
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CRC_PRESET(0x00000000, 32, 0, 0x814141AB, 0x00000000), // CRC-32Q, test vector for "123456789": 0x3010bf7f
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CRC_PRESET(0xFFFFFFFF, 32, 1, 0x04C11DB7, 0x00000000), // CRC-32/JAMCRC, test vector for "123456789": 0x340bc6d9
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CRC_PRESET(0x00000000, 32, 0, 0x000000AF, 0x00000000), // CRC-32/XFER, test vector for "123456789": 0xbd0be338
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CRC_PRESET(0x0000000000000000, 64, 0, 0x42F0E1EBA9EA3693, 0x0000000000000000), // CRC-64, check: 0x6c40df5f0b497347
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CRC_PRESET(0x0000000000000000, 64, 0, 0x42F0E1EBA9EA3693, 0x0000000000000000), // CRC-64/ECMA-182, check: 0x6c40df5f0b497347
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CRC_PRESET(0xFFFFFFFFFFFFFFFF, 64, 0, 0x42F0E1EBA9EA3693, 0xFFFFFFFFFFFFFFFF), // CRC-64/WE, check: 0x62ec59e3f1a4f00a
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CRC_PRESET(0xFFFFFFFFFFFFFFFF, 64, 1, 0x42F0E1EBA9EA3693, 0xFFFFFFFFFFFFFFFF), // CRC-64/XZ, check: 0x995dc9bbdf1939fa
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CRC_PRESET(0xFFFFFFFFFFFFFFFF, 64, 1, 0x000000000000001b, 0xFFFFFFFFFFFFFFFF), // CRC-64/ISO, check: 0xb90956c775a41001
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};
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void crc_init_preset(RzCrc *ctx, RzCrcPresets preset) {
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ctx->crc = crc_presets[preset].crc;
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ctx->size = crc_presets[preset].size;
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ctx->reflect = crc_presets[preset].reflect;
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ctx->poly = crc_presets[preset].poly;
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ctx->xout = crc_presets[preset].xout;
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}
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utcrc rz_hash_crc_preset(const ut8 *data, ut32 size, RzCrcPresets preset) {
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if (!data || !size || preset >= CRC_PRESET_SIZE) {
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return 0;
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}
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utcrc r;
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RzCrc crcctx;
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crc_init_preset(&crcctx, preset);
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crc_update(&crcctx, data, size);
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crc_final(&crcctx, &r);
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return r;
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}
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