/* crc32.c

 * CRC-32 routine

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1998 Gerald Combs

 *

 * SPDX-License-Identifier: GPL-2.0-or-later

 *

 * Credits:

 *

 * Table from Solomon Peachy

 * Routine from Chris Waters

 */

#include "config.h"

#include <wsutil/crc32.h>

#include <wsutil/zlib_compat.h>

#define CRC32_ACCUMULATE(c,d,table) (c=(c>>8)^(table)[(c^(d))&0xFF])

/*****************************************************************/

/*                                                               */

/* CRC32C LOOKUP TABLE                                           */

/* +++================                                           */

/* The following CRC lookup table was generated automagically    */

/* by the Rocksoft^tm Model CRC Algorithm Table Generation       */

/* Program V1.0 using the following model parameters:            */

/*                                                               */

/*    Width   : 4 bytes.                                         */

/*    Poly    : 0x1EDC6F41L                                      */

/*    Reverse : true.                                            */

/*                                                               */

/* For more information on the Rocksoft^tm Model CRC Algorithm,  */

/* see the document titled "A Painless Guide to CRC Error        */

/* Detection Algorithms" by Ross Williams                        */

/* (ross@guest.adelaide.edu.au.). This document is likely to be  */

/* in the FTP archive "ftp.adelaide.edu.au/pub/rocksoft".        */

/*                                                               */

/*****************************************************************/

#define CRC32C(c,d) CRC32_ACCUMULATE(c,d,crc32c_table)

static const uint32_t crc32c_table[256] = {

    0x00000000U, 0xF26B8303U, 0xE13B70F7U, 0x1350F3F4U, 0xC79A971FU,

    0x35F1141CU, 0x26A1E7E8U, 0xD4CA64EBU, 0x8AD958CFU, 0x78B2DBCCU,

    0x6BE22838U, 0x9989AB3BU, 0x4D43CFD0U, 0xBF284CD3U, 0xAC78BF27U,

    0x5E133C24U, 0x105EC76FU, 0xE235446CU, 0xF165B798U, 0x030E349BU,

    0xD7C45070U, 0x25AFD373U, 0x36FF2087U, 0xC494A384U, 0x9A879FA0U,

    0x68EC1CA3U, 0x7BBCEF57U, 0x89D76C54U, 0x5D1D08BFU, 0xAF768BBCU,

    0xBC267848U, 0x4E4DFB4BU, 0x20BD8EDEU, 0xD2D60DDDU, 0xC186FE29U,

    0x33ED7D2AU, 0xE72719C1U, 0x154C9AC2U, 0x061C6936U, 0xF477EA35U,

    0xAA64D611U, 0x580F5512U, 0x4B5FA6E6U, 0xB93425E5U, 0x6DFE410EU,

    0x9F95C20DU, 0x8CC531F9U, 0x7EAEB2FAU, 0x30E349B1U, 0xC288CAB2U,

    0xD1D83946U, 0x23B3BA45U, 0xF779DEAEU, 0x05125DADU, 0x1642AE59U,

    0xE4292D5AU, 0xBA3A117EU, 0x4851927DU, 0x5B016189U, 0xA96AE28AU,

    0x7DA08661U, 0x8FCB0562U, 0x9C9BF696U, 0x6EF07595U, 0x417B1DBCU,

    0xB3109EBFU, 0xA0406D4BU, 0x522BEE48U, 0x86E18AA3U, 0x748A09A0U,

    0x67DAFA54U, 0x95B17957U, 0xCBA24573U, 0x39C9C670U, 0x2A993584U,

    0xD8F2B687U, 0x0C38D26CU, 0xFE53516FU, 0xED03A29BU, 0x1F682198U,

    0x5125DAD3U, 0xA34E59D0U, 0xB01EAA24U, 0x42752927U, 0x96BF4DCCU,

    0x64D4CECFU, 0x77843D3BU, 0x85EFBE38U, 0xDBFC821CU, 0x2997011FU,

    0x3AC7F2EBU, 0xC8AC71E8U, 0x1C661503U, 0xEE0D9600U, 0xFD5D65F4U,

    0x0F36E6F7U, 0x61C69362U, 0x93AD1061U, 0x80FDE395U, 0x72966096U,

    0xA65C047DU, 0x5437877EU, 0x4767748AU, 0xB50CF789U, 0xEB1FCBADU,

    0x197448AEU, 0x0A24BB5AU, 0xF84F3859U, 0x2C855CB2U, 0xDEEEDFB1U,

    0xCDBE2C45U, 0x3FD5AF46U, 0x7198540DU, 0x83F3D70EU, 0x90A324FAU,

    0x62C8A7F9U, 0xB602C312U, 0x44694011U, 0x5739B3E5U, 0xA55230E6U,

    0xFB410CC2U, 0x092A8FC1U, 0x1A7A7C35U, 0xE811FF36U, 0x3CDB9BDDU,

    0xCEB018DEU, 0xDDE0EB2AU, 0x2F8B6829U, 0x82F63B78U, 0x709DB87BU,

    0x63CD4B8FU, 0x91A6C88CU, 0x456CAC67U, 0xB7072F64U, 0xA457DC90U,

    0x563C5F93U, 0x082F63B7U, 0xFA44E0B4U, 0xE9141340U, 0x1B7F9043U,

    0xCFB5F4A8U, 0x3DDE77ABU, 0x2E8E845FU, 0xDCE5075CU, 0x92A8FC17U,

    0x60C37F14U, 0x73938CE0U, 0x81F80FE3U, 0x55326B08U, 0xA759E80BU,

    0xB4091BFFU, 0x466298FCU, 0x1871A4D8U, 0xEA1A27DBU, 0xF94AD42FU,

    0x0B21572CU, 0xDFEB33C7U, 0x2D80B0C4U, 0x3ED04330U, 0xCCBBC033U,

    0xA24BB5A6U, 0x502036A5U, 0x4370C551U, 0xB11B4652U, 0x65D122B9U,

    0x97BAA1BAU, 0x84EA524EU, 0x7681D14DU, 0x2892ED69U, 0xDAF96E6AU,

    0xC9A99D9EU, 0x3BC21E9DU, 0xEF087A76U, 0x1D63F975U, 0x0E330A81U,

    0xFC588982U, 0xB21572C9U, 0x407EF1CAU, 0x532E023EU, 0xA145813DU,

    0x758FE5D6U, 0x87E466D5U, 0x94B49521U, 0x66DF1622U, 0x38CC2A06U,

    0xCAA7A905U, 0xD9F75AF1U, 0x2B9CD9F2U, 0xFF56BD19U, 0x0D3D3E1AU,

    0x1E6DCDEEU, 0xEC064EEDU, 0xC38D26C4U, 0x31E6A5C7U, 0x22B65633U,

    0xD0DDD530U, 0x0417B1DBU, 0xF67C32D8U, 0xE52CC12CU, 0x1747422FU,

    0x49547E0BU, 0xBB3FFD08U, 0xA86F0EFCU, 0x5A048DFFU, 0x8ECEE914U,

    0x7CA56A17U, 0x6FF599E3U, 0x9D9E1AE0U, 0xD3D3E1ABU, 0x21B862A8U,

    0x32E8915CU, 0xC083125FU, 0x144976B4U, 0xE622F5B7U, 0xF5720643U,

    0x07198540U, 0x590AB964U, 0xAB613A67U, 0xB831C993U, 0x4A5A4A90U,

    0x9E902E7BU, 0x6CFBAD78U, 0x7FAB5E8CU, 0x8DC0DD8FU, 0xE330A81AU,

    0x115B2B19U, 0x020BD8EDU, 0xF0605BEEU, 0x24AA3F05U, 0xD6C1BC06U,

    0xC5914FF2U, 0x37FACCF1U, 0x69E9F0D5U, 0x9B8273D6U, 0x88D28022U,

    0x7AB90321U, 0xAE7367CAU, 0x5C18E4C9U, 0x4F48173DU, 0xBD23943EU,

    0xF36E6F75U, 0x0105EC76U, 0x12551F82U, 0xE03E9C81U, 0x34F4F86AU,

    0xC69F7B69U, 0xD5CF889DU, 0x27A40B9EU, 0x79B737BAU, 0x8BDCB4B9U,

    0x988C474DU, 0x6AE7C44EU, 0xBE2DA0A5U, 0x4C4623A6U, 0x5F16D052U,

    0xAD7D5351U };

/*

 * Table for the AUTODIN/HDLC/802.x CRC.

 *

 * Polynomial is

 *

 *  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

 */

static const uint32_t crc32_ccitt_table[256] = {

  0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,

  0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,

  0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,

  0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,

  0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,

  0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,

  0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,

  0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,

  0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,

  0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,

  0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,

  0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,

  0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,

  0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,

  0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,

  0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,

  0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,

  0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,

  0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,

  0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,

  0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,

  0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,

  0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,

  0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,

  0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,

  0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,

  0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,

  0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,

  0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,

  0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,

  0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,

  0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,

  0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,

  0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,

  0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,

  0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,

  0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,

  0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,

  0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,

  0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,

  0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,

  0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,

  0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,

  0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,

  0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,

  0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,

  0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,

  0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,

  0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,

  0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,

  0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,

  0x2d02ef8d

};

/*

 * Table for the MPEG-2 CRC.

 *

 * Polynomial is

 *

 *  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

 *

 * (which is the same polynomial as the one above us).

 *

 * NOTE: this is also used for ATM AAL5.

 */

static const uint32_t crc32_mpeg2_table[256] = {

    0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,

    0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,

    0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,

    0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,

    0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,

    0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,

    0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,

    0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,

    0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,

    0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,

    0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,

    0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,

    0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,

    0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,

    0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,

    0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,

    0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,

    0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,

    0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,

    0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,

    0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,

    0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,

    0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,

    0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,

    0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,

    0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,

    0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,

    0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,

    0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,

    0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,

    0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,

    0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,

    0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,

    0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,

    0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,

    0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,

    0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,

    0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,

    0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,

    0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,

    0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,

    0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,

    0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4

};

/* This table was compiled using the polynom: 0x0AA725CF*/

static const uint32_t crc32_0AA725CF_reverse[] = {

    0x00000000U, 0xCEAA95CEU, 0x7A1CE13DU, 0xB4B674F3U,

    0xF439C27AU, 0x3A9357B4U, 0x8E252347U, 0x408FB689U,

    0x0F3A4E55U, 0xC190DB9BU, 0x7526AF68U, 0xBB8C3AA6U,

    0xFB038C2FU, 0x35A919E1U, 0x811F6D12U, 0x4FB5F8DCU,

    0x1E749CAAU, 0xD0DE0964U, 0x64687D97U, 0xAAC2E859U,

    0xEA4D5ED0U, 0x24E7CB1EU, 0x9051BFEDU, 0x5EFB2A23U,

    0x114ED2FFU, 0xDFE44731U, 0x6B5233C2U, 0xA5F8A60CU,

    0xE5771085U, 0x2BDD854BU, 0x9F6BF1B8U, 0x51C16476U,

    0x3CE93954U, 0xF243AC9AU, 0x46F5D869U, 0x885F4DA7U,

    0xC8D0FB2EU, 0x067A6EE0U, 0xB2CC1A13U, 0x7C668FDDU,

    0x33D37701U, 0xFD79E2CFU, 0x49CF963CU, 0x876503F2U,

    0xC7EAB57BU, 0x094020B5U, 0xBDF65446U, 0x735CC188U,

    0x229DA5FEU, 0xEC373030U, 0x588144C3U, 0x962BD10DU,

    0xD6A46784U, 0x180EF24AU, 0xACB886B9U, 0x62121377U,

    0x2DA7EBABU, 0xE30D7E65U, 0x57BB0A96U, 0x99119F58U,

    0xD99E29D1U, 0x1734BC1FU, 0xA382C8ECU, 0x6D285D22U,

    0x79D272A8U, 0xB778E766U, 0x03CE9395U, 0xCD64065BU,

    0x8DEBB0D2U, 0x4341251CU, 0xF7F751EFU, 0x395DC421U,

    0x76E83CFDU, 0xB842A933U, 0x0CF4DDC0U, 0xC25E480EU,

    0x82D1FE87U, 0x4C7B6B49U, 0xF8CD1FBAU, 0x36678A74U,

    0x67A6EE02U, 0xA90C7BCCU, 0x1DBA0F3FU, 0xD3109AF1U,

    0x939F2C78U, 0x5D35B9B6U, 0xE983CD45U, 0x2729588BU,

    0x689CA057U, 0xA6363599U, 0x1280416AU, 0xDC2AD4A4U,

    0x9CA5622DU, 0x520FF7E3U, 0xE6B98310U, 0x281316DEU,

    0x453B4BFCU, 0x8B91DE32U, 0x3F27AAC1U, 0xF18D3F0FU,

    0xB1028986U, 0x7FA81C48U, 0xCB1E68BBU, 0x05B4FD75U,

    0x4A0105A9U, 0x84AB9067U, 0x301DE494U, 0xFEB7715AU,

    0xBE38C7D3U, 0x7092521DU, 0xC42426EEU, 0x0A8EB320U,

    0x5B4FD756U, 0x95E54298U, 0x2153366BU, 0xEFF9A3A5U,

    0xAF76152CU, 0x61DC80E2U, 0xD56AF411U, 0x1BC061DFU,

    0x54759903U, 0x9ADF0CCDU, 0x2E69783EU, 0xE0C3EDF0U,

    0xA04C5B79U, 0x6EE6CEB7U, 0xDA50BA44U, 0x14FA2F8AU,

    0xF3A4E550U, 0x3D0E709EU, 0x89B8046DU, 0x471291A3U,

    0x079D272AU, 0xC937B2E4U, 0x7D81C617U, 0xB32B53D9U,

    0xFC9EAB05U, 0x32343ECBU, 0x86824A38U, 0x4828DFF6U,

    0x08A7697FU, 0xC60DFCB1U, 0x72BB8842U, 0xBC111D8CU,

    0xEDD079FAU, 0x237AEC34U, 0x97CC98C7U, 0x59660D09U,

    0x19E9BB80U, 0xD7432E4EU, 0x63F55ABDU, 0xAD5FCF73U,

    0xE2EA37AFU, 0x2C40A261U, 0x98F6D692U, 0x565C435CU,

    0x16D3F5D5U, 0xD879601BU, 0x6CCF14E8U, 0xA2658126U,

    0xCF4DDC04U, 0x01E749CAU, 0xB5513D39U, 0x7BFBA8F7U,

    0x3B741E7EU, 0xF5DE8BB0U, 0x4168FF43U, 0x8FC26A8DU,

    0xC0779251U, 0x0EDD079FU, 0xBA6B736CU, 0x74C1E6A2U,

    0x344E502BU, 0xFAE4C5E5U, 0x4E52B116U, 0x80F824D8U,

    0xD13940AEU, 0x1F93D560U, 0xAB25A193U, 0x658F345DU,

    0x250082D4U, 0xEBAA171AU, 0x5F1C63E9U, 0x91B6F627U,

    0xDE030EFBU, 0x10A99B35U, 0xA41FEFC6U, 0x6AB57A08U,

    0x2A3ACC81U, 0xE490594FU, 0x50262DBCU, 0x9E8CB872U,

    0x8A7697F8U, 0x44DC0236U, 0xF06A76C5U, 0x3EC0E30BU,

    0x7E4F5582U, 0xB0E5C04CU, 0x0453B4BFU, 0xCAF92171U,

    0x854CD9ADU, 0x4BE64C63U, 0xFF503890U, 0x31FAAD5EU,

    0x71751BD7U, 0xBFDF8E19U, 0x0B69FAEAU, 0xC5C36F24U,

    0x94020B52U, 0x5AA89E9CU, 0xEE1EEA6FU, 0x20B47FA1U,

    0x603BC928U, 0xAE915CE6U, 0x1A272815U, 0xD48DBDDBU,

    0x9B384507U, 0x5592D0C9U, 0xE124A43AU, 0x2F8E31F4U,

    0x6F01877DU, 0xA1AB12B3U, 0x151D6640U, 0xDBB7F38EU,

    0xB69FAEACU, 0x78353B62U, 0xCC834F91U, 0x0229DA5FU,

    0x42A66CD6U, 0x8C0CF918U, 0x38BA8DEBU, 0xF6101825U,

    0xB9A5E0F9U, 0x770F7537U, 0xC3B901C4U, 0x0D13940AU,

    0x4D9C2283U, 0x8336B74DU, 0x3780C3BEU, 0xF92A5670U,

    0xA8EB3206U, 0x6641A7C8U, 0xD2F7D33BU, 0x1C5D46F5U,

    0x5CD2F07CU, 0x927865B2U, 0x26CE1141U, 0xE864848FU,

    0xA7D17C53U, 0x697BE99DU, 0xDDCD9D6EU, 0x136708A0U,

    0x53E8BE29U, 0x9D422BE7U, 0x29F45F14U, 0xE75ECADAU

};

/* This table was compiled using the polynom: 0x5D6DCB */

static const uint32_t crc32_5D6DCB[] =

{

    0x00000000, 0x005d6dcb, 0x00badb96, 0x00e7b65d,

    0x0028dae7, 0x0075b72c, 0x00920171, 0x00cf6cba,

    0x0051b5ce, 0x000cd805, 0x00eb6e58, 0x00b60393,

    0x00796f29, 0x002402e2, 0x00c3b4bf, 0x009ed974,

    0x00a36b9c, 0x00fe0657, 0x0019b00a, 0x0044ddc1,

    0x008bb17b, 0x00d6dcb0, 0x00316aed, 0x006c0726,

    0x00f2de52, 0x00afb399, 0x004805c4, 0x0015680f,

    0x00da04b5, 0x0087697e, 0x0060df23, 0x003db2e8,

    0x001bbaf3, 0x0046d738, 0x00a16165, 0x00fc0cae,

    0x00336014, 0x006e0ddf, 0x0089bb82, 0x00d4d649,

    0x004a0f3d, 0x001762f6, 0x00f0d4ab, 0x00adb960,

    0x0062d5da, 0x003fb811, 0x00d80e4c, 0x00856387,

    0x00b8d16f, 0x00e5bca4, 0x00020af9, 0x005f6732,

    0x00900b88, 0x00cd6643, 0x002ad01e, 0x0077bdd5,

    0x00e964a1, 0x00b4096a, 0x0053bf37, 0x000ed2fc,

    0x00c1be46, 0x009cd38d, 0x007b65d0, 0x0026081b,

    0x003775e6, 0x006a182d, 0x008dae70, 0x00d0c3bb,

    0x001faf01, 0x0042c2ca, 0x00a57497, 0x00f8195c,

    0x0066c028, 0x003bade3, 0x00dc1bbe, 0x00817675,

    0x004e1acf, 0x00137704, 0x00f4c159, 0x00a9ac92,

    0x00941e7a, 0x00c973b1, 0x002ec5ec, 0x0073a827,

    0x00bcc49d, 0x00e1a956, 0x00061f0b, 0x005b72c0,

    0x00c5abb4, 0x0098c67f, 0x007f7022, 0x00221de9,

    0x00ed7153, 0x00b01c98, 0x0057aac5, 0x000ac70e,

    0x002ccf15, 0x0071a2de, 0x00961483, 0x00cb7948,

    0x000415f2, 0x00597839, 0x00bece64, 0x00e3a3af,

    0x007d7adb, 0x00201710, 0x00c7a14d, 0x009acc86,

    0x0055a03c, 0x0008cdf7, 0x00ef7baa, 0x00b21661,

    0x008fa489, 0x00d2c942, 0x00357f1f, 0x006812d4,

    0x00a77e6e, 0x00fa13a5, 0x001da5f8, 0x0040c833,

    0x00de1147, 0x00837c8c, 0x0064cad1, 0x0039a71a,

    0x00f6cba0, 0x00aba66b, 0x004c1036, 0x00117dfd,

    0x006eebcc, 0x00338607, 0x00d4305a, 0x00895d91,

    0x0046312b, 0x001b5ce0, 0x00fceabd, 0x00a18776,

    0x003f5e02, 0x006233c9, 0x00858594, 0x00d8e85f,

    0x001784e5, 0x004ae92e, 0x00ad5f73, 0x00f032b8,

    0x00cd8050, 0x0090ed9b, 0x00775bc6, 0x002a360d,

    0x00e55ab7, 0x00b8377c, 0x005f8121, 0x0002ecea,

    0x009c359e, 0x00c15855, 0x0026ee08, 0x007b83c3,

    0x00b4ef79, 0x00e982b2, 0x000e34ef, 0x00535924,

    0x0075513f, 0x00283cf4, 0x00cf8aa9, 0x0092e762,

    0x005d8bd8, 0x0000e613, 0x00e7504e, 0x00ba3d85,

    0x0024e4f1, 0x0079893a, 0x009e3f67, 0x00c352ac,

    0x000c3e16, 0x005153dd, 0x00b6e580, 0x00eb884b,

    0x00d63aa3, 0x008b5768, 0x006ce135, 0x00318cfe,

    0x00fee044, 0x00a38d8f, 0x00443bd2, 0x00195619,

    0x00878f6d, 0x00dae2a6, 0x003d54fb, 0x00603930,

    0x00af558a, 0x00f23841, 0x00158e1c, 0x0048e3d7,

    0x00599e2a, 0x0004f3e1, 0x00e345bc, 0x00be2877,

    0x007144cd, 0x002c2906, 0x00cb9f5b, 0x0096f290,

    0x00082be4, 0x0055462f, 0x00b2f072, 0x00ef9db9,

    0x0020f103, 0x007d9cc8, 0x009a2a95, 0x00c7475e,

    0x00faf5b6, 0x00a7987d, 0x00402e20, 0x001d43eb,

    0x00d22f51, 0x008f429a, 0x0068f4c7, 0x0035990c,

    0x00ab4078, 0x00f62db3, 0x00119bee, 0x004cf625,

    0x00839a9f, 0x00def754, 0x00394109, 0x00642cc2,

    0x004224d9, 0x001f4912, 0x00f8ff4f, 0x00a59284,

    0x006afe3e, 0x003793f5, 0x00d025a8, 0x008d4863,

    0x00139117, 0x004efcdc, 0x00a94a81, 0x00f4274a,

    0x003b4bf0, 0x0066263b, 0x00819066, 0x00dcfdad,

    0x00e14f45, 0x00bc228e, 0x005b94d3, 0x0006f918,

    0x00c995a2, 0x0094f869, 0x00734e34, 0x002e23ff,

    0x00b0fa8b, 0x00ed9740, 0x000a211d, 0x00574cd6,

    0x0098206c, 0x00c54da7, 0x0022fbfa, 0x007f9631

};

/*

 * Table for the SC-32 CRC, also referred to as "CRC-32/6 corrected"

 * Defined in IEC 61784-3-3 (Safety fieldbuses aka ProfiSafe) and

 * referred in 61375-2-3 (TRDP SDTv2)

 * Xor{in,out}: no

 * Reflect{in,out}: no

 * Polynomial: 0x1F4ACFB13

 */

static const uint32_t crc32_sc32_table[256] = {

  0x00000000U, 0xF4ACFB13U, 0x1DF50D35U, 0xE959F626U, 0x3BEA1A6AU,

  0xCF46E179U, 0x261F175FU, 0xD2B3EC4CU, 0x77D434D4U, 0x8378CFC7U,

  0x6A2139E1U, 0x9E8DC2F2U, 0x4C3E2EBEU, 0xB892D5ADU, 0x51CB238BU,

  0xA567D898U, 0xEFA869A8U, 0x1B0492BBU, 0xF25D649DU, 0x06F19F8EU,

  0xD44273C2U, 0x20EE88D1U, 0xC9B77EF7U, 0x3D1B85E4U, 0x987C5D7CU,

  0x6CD0A66FU, 0x85895049U, 0x7125AB5AU, 0xA3964716U, 0x573ABC05U,

  0xBE634A23U, 0x4ACFB130U, 0x2BFC2843U, 0xDF50D350U, 0x36092576U,

  0xC2A5DE65U, 0x10163229U, 0xE4BAC93AU, 0x0DE33F1CU, 0xF94FC40FU,

  0x5C281C97U, 0xA884E784U, 0x41DD11A2U, 0xB571EAB1U, 0x67C206FDU,

  0x936EFDEEU, 0x7A370BC8U, 0x8E9BF0DBU, 0xC45441EBU, 0x30F8BAF8U,

  0xD9A14CDEU, 0x2D0DB7CDU, 0xFFBE5B81U, 0x0B12A092U, 0xE24B56B4U,

  0x16E7ADA7U, 0xB380753FU, 0x472C8E2CU, 0xAE75780AU, 0x5AD98319U,

  0x886A6F55U, 0x7CC69446U, 0x959F6260U, 0x61339973U, 0x57F85086U,

  0xA354AB95U, 0x4A0D5DB3U, 0xBEA1A6A0U, 0x6C124AECU, 0x98BEB1FFU,

  0x71E747D9U, 0x854BBCCAU, 0x202C6452U, 0xD4809F41U, 0x3DD96967U,

  0xC9759274U, 0x1BC67E38U, 0xEF6A852BU, 0x0633730DU, 0xF29F881EU,

  0xB850392EU, 0x4CFCC23DU, 0xA5A5341BU, 0x5109CF08U, 0x83BA2344U,

  0x7716D857U, 0x9E4F2E71U, 0x6AE3D562U, 0xCF840DFAU, 0x3B28F6E9U,

  0xD27100CFU, 0x26DDFBDCU, 0xF46E1790U, 0x00C2EC83U, 0xE99B1AA5U,

  0x1D37E1B6U, 0x7C0478C5U, 0x88A883D6U, 0x61F175F0U, 0x955D8EE3U,

  0x47EE62AFU, 0xB34299BCU, 0x5A1B6F9AU, 0xAEB79489U, 0x0BD04C11U,

  0xFF7CB702U, 0x16254124U, 0xE289BA37U, 0x303A567BU, 0xC496AD68U,

  0x2DCF5B4EU, 0xD963A05DU, 0x93AC116DU, 0x6700EA7EU, 0x8E591C58U,

  0x7AF5E74BU, 0xA8460B07U, 0x5CEAF014U, 0xB5B30632U, 0x411FFD21U,

  0xE47825B9U, 0x10D4DEAAU, 0xF98D288CU, 0x0D21D39FU, 0xDF923FD3U,

  0x2B3EC4C0U, 0xC26732E6U, 0x36CBC9F5U, 0xAFF0A10CU, 0x5B5C5A1FU,

  0xB205AC39U, 0x46A9572AU, 0x941ABB66U, 0x60B64075U, 0x89EFB653U,

  0x7D434D40U, 0xD82495D8U, 0x2C886ECBU, 0xC5D198EDU, 0x317D63FEU,

  0xE3CE8FB2U, 0x176274A1U, 0xFE3B8287U, 0x0A977994U, 0x4058C8A4U,

  0xB4F433B7U, 0x5DADC591U, 0xA9013E82U, 0x7BB2D2CEU, 0x8F1E29DDU,

  0x6647DFFBU, 0x92EB24E8U, 0x378CFC70U, 0xC3200763U, 0x2A79F145U,

  0xDED50A56U, 0x0C66E61AU, 0xF8CA1D09U, 0x1193EB2FU, 0xE53F103CU,

  0x840C894FU, 0x70A0725CU, 0x99F9847AU, 0x6D557F69U, 0xBFE69325U,

  0x4B4A6836U, 0xA2139E10U, 0x56BF6503U, 0xF3D8BD9BU, 0x07744688U,

  0xEE2DB0AEU, 0x1A814BBDU, 0xC832A7F1U, 0x3C9E5CE2U, 0xD5C7AAC4U,

  0x216B51D7U, 0x6BA4E0E7U, 0x9F081BF4U, 0x7651EDD2U, 0x82FD16C1U,

  0x504EFA8DU, 0xA4E2019EU, 0x4DBBF7B8U, 0xB9170CABU, 0x1C70D433U,

  0xE8DC2F20U, 0x0185D906U, 0xF5292215U, 0x279ACE59U, 0xD336354AU,

  0x3A6FC36CU, 0xCEC3387FU, 0xF808F18AU, 0x0CA40A99U, 0xE5FDFCBFU,

  0x115107ACU, 0xC3E2EBE0U, 0x374E10F3U, 0xDE17E6D5U, 0x2ABB1DC6U,

  0x8FDCC55EU, 0x7B703E4DU, 0x9229C86BU, 0x66853378U, 0xB436DF34U,

  0x409A2427U, 0xA9C3D201U, 0x5D6F2912U, 0x17A09822U, 0xE30C6331U,

  0x0A559517U, 0xFEF96E04U, 0x2C4A8248U, 0xD8E6795BU, 0x31BF8F7DU,

  0xC513746EU, 0x6074ACF6U, 0x94D857E5U, 0x7D81A1C3U, 0x892D5AD0U,

  0x5B9EB69CU, 0xAF324D8FU, 0x466BBBA9U, 0xB2C740BAU, 0xD3F4D9C9U,

  0x275822DAU, 0xCE01D4FCU, 0x3AAD2FEFU, 0xE81EC3A3U, 0x1CB238B0U,

  0xF5EBCE96U, 0x01473585U, 0xA420ED1DU, 0x508C160EU, 0xB9D5E028U,

  0x4D791B3BU, 0x9FCAF777U, 0x6B660C64U, 0x823FFA42U, 0x76930151U,

  0x3C5CB061U, 0xC8F04B72U, 0x21A9BD54U, 0xD5054647U, 0x07B6AA0BU,

  0xF31A5118U, 0x1A43A73EU, 0xEEEF5C2DU, 0x4B8884B5U, 0xBF247FA6U,

  0x567D8980U, 0xA2D17293U, 0x70629EDFU, 0x84CE65CCU, 0x6D9793EAU,

  0x993B68F9U

};

uint32_t

crc32c_table_lookup (unsigned char pos)

{

  return crc32c_table[pos];

}

uint32_t

crc32_ccitt_table_lookup (unsigned char pos)

{

  return crc32_ccitt_table[pos];

}

uint32_t

crc32c_calculate(const void *buf, int len, uint32_t crc)

{

  const uint8_t *p = (const uint8_t *)buf;

  crc = CRC32C_SWAP(crc);

  while (len-- > 0) {

    CRC32C(crc, *p++);

  }

  return CRC32C_SWAP(crc);

}

uint32_t

crc32c_calculate_no_swap(const void *buf, int len, uint32_t crc)

{

  const uint8_t *p = (const uint8_t *)buf;

  while (len-- > 0) {

    CRC32C(crc, *p++);

  }

  return crc;

}

uint32_t

crc32_ccitt(const uint8_t *buf, unsigned len)

{

  return (crc32_ccitt_seed(buf, len, CRC32_CCITT_SEED));

}

uint32_t

crc32_ccitt_seed(const uint8_t *buf, unsigned len, uint32_t seed)

{

#if defined (HAVE_ZLIB) || defined (HAVE_ZLIBNG)

  return (unsigned)ZLIB_PREFIX(crc32)(~seed, buf, len);

#else /* USE_ZLIB_OR_ZLIBNG */

  unsigned i;

  uint32_t crc32 = seed;

  for (i = 0; i < len; i++)

    CRC32_ACCUMULATE(crc32, buf[i], crc32_ccitt_table);

  return ( ~crc32 );

#endif /* USE_ZLIB_OR_ZLIBNG */

}

uint32_t

crc32_mpeg2_seed(const uint8_t *buf, unsigned len, uint32_t seed)

{

  unsigned i;

  uint32_t crc32;

  crc32 = seed;

  for (i = 0; i < len; i++)

    crc32 = (crc32 << 8) ^ crc32_mpeg2_table[((crc32 >> 24) ^ buf[i]) & 0xff];

  return ( crc32 );

}

uint32_t

crc32_0x0AA725CF_seed(const uint8_t *buf, unsigned len, uint32_t seed)

{

  unsigned crc32;

  crc32 = (unsigned)seed;

  while( len-- != 0 )

    CRC32_ACCUMULATE(crc32, *buf++, crc32_0AA725CF_reverse);

  return (uint32_t)crc32;

}

uint32_t

crc32_0x5D6DCB_seed(const uint8_t *buf, unsigned len, uint32_t seed)

{

  uint32_t crc = seed;

  if (len > 0)

  {

    while (len-- > 0)

    {

      uint8_t data = *buf++;

      /* XOR data with CRC2, look up result, then XOR that with CRC; */

      crc = crc32_5D6DCB[((crc >> 16) ^ data) & 0xff] ^ (crc << 8);

    }

  }

  return (crc & 0x00ffffff);

}

uint32_t

crc32_sc32_seed(const uint8_t *buf, unsigned len, uint32_t seed)

{

  unsigned i;

  uint32_t crc32;

  crc32 = seed;

  for (i = 0; i < len; i++)

    crc32 = (crc32 << 8) ^ crc32_sc32_table[((crc32 >> 24) ^ buf[i]) & 0xff];

  return ( crc32 );

}

/*

 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html

 *

 * Local variables:

 * c-basic-offset: 8

 * tab-width: 8

 * indent-tabs-mode: t

 * End:

 *

 * vi: set shiftwidth=8 tabstop=8 noexpandtab:

 * :indentSize=8:tabSize=8:noTabs=false:

 */