ccan/crc: remove broken "crc32c" routines which gave wrong results.
authorRusty Russell <rusty@rustcorp.com.au>
Tue, 11 Jun 2019 04:56:02 +0000 (14:26 +0930)
committerRusty Russell <rusty@rustcorp.com.au>
Tue, 11 Jun 2019 04:56:02 +0000 (14:26 +0930)
I copied them from the kernel, but obviously didn't find good test
vectors.  In particular, the CRC of all zeroes is not 0!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
ccan/crc/_info
ccan/crc/crc.c
ccan/crc/crc.h
ccan/crc/test/api.c

index 8a47db969fbe9d5804273696cca3db64ef9fa363..d786aa2509d0e9330ed564e046fa356a1ebb1eb9 100644 (file)
@@ -16,7 +16,7 @@
  *     #include <stdio.h>
  *     #include <stdlib.h>
  *
- *     // Given "IHATEMATH" outputs 0x98a3b8df
+ *     // Given "IHATEMATH" outputs 0x35c6ad5a
  *     int main(int argc, char *argv[])
  *     {
  *             if (argc != 2) {
@@ -24,7 +24,7 @@
  *                             "Prints 32 bit CRC of the string\n", argv[0]);
  *                     exit(1);
  *             }
- *             printf("0x%08x\n", crc32c(0, argv[1], strlen(argv[1])));
+ *             printf("0x%08x\n", crc32_ieee(0, argv[1], strlen(argv[1])));
  *             exit(0);
  *     }
  *
index d2c8c3130cd4880957d9ad9f2944ad805f403404..f23c9cf2a6cb7ee52fb620eb149f8d3999189d2b 100644 (file)
 #include <stdbool.h>
 #include <stdlib.h>
 
-/*
- * This is the CRC-32C table
- * Generated with:
- * width = 32 bits
- * poly = 0x1EDC6F41
- * reflect input bytes = true
- * reflect output bytes = true
- */
-static const uint32_t crc32c_tab[] = {
-       0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4,
-       0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB,
-       0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B,
-       0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24,
-       0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B,
-       0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384,
-       0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54,
-       0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B,
-       0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A,
-       0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35,
-       0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5,
-       0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA,
-       0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45,
-       0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A,
-       0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A,
-       0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595,
-       0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48,
-       0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957,
-       0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687,
-       0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198,
-       0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927,
-       0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38,
-       0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8,
-       0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7,
-       0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096,
-       0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789,
-       0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859,
-       0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46,
-       0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9,
-       0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6,
-       0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36,
-       0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829,
-       0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C,
-       0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93,
-       0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043,
-       0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C,
-       0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3,
-       0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC,
-       0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C,
-       0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033,
-       0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652,
-       0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D,
-       0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D,
-       0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982,
-       0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D,
-       0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622,
-       0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2,
-       0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED,
-       0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530,
-       0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F,
-       0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF,
-       0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0,
-       0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F,
-       0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540,
-       0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90,
-       0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F,
-       0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE,
-       0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1,
-       0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321,
-       0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E,
-       0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81,
-       0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E,
-       0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E,
-       0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351
-};
-
-/*
- * Steps through buffer one byte at at time, calculates reflected
- * crc using table.
- */
-uint32_t crc32c(uint32_t crc, const void *buf, size_t size)
-{
-       const uint8_t *p = buf;
-
-       while (size--)
-               crc = crc32c_tab[(crc ^ *p++) & 0xFFL] ^ (crc >> 8);
-
-       return crc;
-}
-
-const uint32_t *crc32c_table(void)
-{
-       return crc32c_tab;
-}
-
 static const uint32_t crc32_ieee_tab[] = {
        0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
        0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
index 25789b7712b7d307b394a6a246109b0bd003cc99..ba9f039c2958f8dc8eb358eade94069d340144ea 100644 (file)
@@ -4,65 +4,9 @@
 #include <stdint.h>
 #include <stdlib.h>
 
-/**
- * crc32c - Castagnoli 32 bit crc of string of bytes
- * @start_crc: the initial crc (usually 0)
- * @buf: pointer to bytes
- * @size: length of buffer
- *
- * If you don't know what crc32 to use, use this one: it's the best.
- *
- * @Article{castagnoli-crc,
- * author =       { Guy Castagnoli and Stefan Braeuer and Martin Herrman},
- * title =        {{Optimization of Cyclic Redundancy-Check Codes with 24
- *                 and 32 Parity Bits}},
- * journal =      IEEE Transactions on Communication,
- * year =         {1993},
- * volume =       {41},
- * number =       {6},
- * pages =        {},
- * month =        {June},
- *}
- * 32 bit CRC checksum using polynomial
- * X^32+X^28+X^27+X^26+X^25+X^23+X^22+X^20+X^19+X^18+X^14+X^13+X^11+X^10+X^9+X^8+X^6+X^0.
- *
- * You can calculate the CRC of non-contiguous arrays by passing @start_crc
- * as 0 the first time, and the current crc result from then on.
- *
- * Example:
- *     #include <sys/uio.h>
- *     ...
- *     // Check that iovec has the crc we expect (Castagnoli version)
- *     static bool check_crc(uint32_t expected, const struct iovec *iov, int l)
- *     {
- *             uint32_t crc = 0;
- *             while (l >= 0) {
- *                     crc = crc32c(crc, iov->iov_base, iov->iov_len);
- *                     iov++;
- *             }
- *             return crc == expected;
- *     }
- */
-uint32_t crc32c(uint32_t start_crc, const void *buf, size_t size);
-
-/**
- * crc32c_table - Get the Castagnoli CRC table
- *
- * For special effects, you might want direct access to the table; this is
- * the standard 256-entry table for this algorithm.
- *
- * In theory, this might need to malloc(), and thus return NULL.
- *
- * Example:
- *     // This dumb code only handles Castagnoli, so assert that here.
- *     static void check_user_crc_table(const uint32_t *usertab)
- *     {
- *             const uint32_t *ctab = crc32c_table();
- *             if (!ctab || memcmp(ctab, usertab, 1024) != 0)
- *                     abort();
- *     }
- */
-const uint32_t *crc32c_table(void);
+/* Note: the crc32c function has been *fixed* (it gave wrong results!) and
+ * moved to the ccan/crc32c module.  You probably want that if you're
+ * just after a "good" crc function. */
 
 /**
  * crc32_ieee - IEEE 802.3 32 bit crc of string of bytes
index 1d56e3d2969000616212585e2b52d3407c188173..524106d76d4bdcc1c6a901a9a8dc1e2fab3c4b03 100644 (file)
@@ -2,73 +2,6 @@
 #include <ccan/tap/tap.h>
 #include <string.h>
 
-static const uint32_t crc32c_tab[] = {
-       0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4,
-       0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB,
-       0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B,
-       0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24,
-       0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B,
-       0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384,
-       0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54,
-       0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B,
-       0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A,
-       0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35,
-       0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5,
-       0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA,
-       0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45,
-       0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A,
-       0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A,
-       0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595,
-       0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48,
-       0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957,
-       0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687,
-       0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198,
-       0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927,
-       0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38,
-       0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8,
-       0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7,
-       0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096,
-       0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789,
-       0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859,
-       0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46,
-       0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9,
-       0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6,
-       0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36,
-       0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829,
-       0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C,
-       0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93,
-       0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043,
-       0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C,
-       0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3,
-       0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC,
-       0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C,
-       0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033,
-       0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652,
-       0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D,
-       0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D,
-       0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982,
-       0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D,
-       0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622,
-       0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2,
-       0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED,
-       0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530,
-       0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F,
-       0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF,
-       0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0,
-       0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F,
-       0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540,
-       0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90,
-       0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F,
-       0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE,
-       0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1,
-       0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321,
-       0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E,
-       0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81,
-       0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E,
-       0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E,
-       0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351
-};
-
 static const uint32_t crc32_ieee_tab[] = {
        0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
        0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
@@ -114,57 +47,8 @@ static const uint32_t crc32_ieee_tab[] = {
        0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
        0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
 };
-/* Expected CRCs of 4 of each char. */
-static uint32_t crcc_expect[] = {
-       0x00000000, 0x99cd23b2, 0x36763195, 0xafbb1227, 0x6cec632a, 0xf5214098, 
-       0x5a9a52bf, 0xc357710d, 0xd9d8c654, 0x4015e5e6, 0xefaef7c1, 0x7663d473, 
-       0xb534a57e, 0x2cf986cc, 0x834294eb, 0x1a8fb759, 0xb65dfa59, 0x2f90d9eb, 
-       0x802bcbcc, 0x19e6e87e, 0xdab19973, 0x437cbac1, 0xecc7a8e6, 0x750a8b54, 
-       0x6f853c0d, 0xf6481fbf, 0x59f30d98, 0xc03e2e2a, 0x03695f27, 0x9aa47c95, 
-       0x351f6eb2, 0xacd24d00, 0x69578243, 0xf09aa1f1, 0x5f21b3d6, 0xc6ec9064, 
-       0x05bbe169, 0x9c76c2db, 0x33cdd0fc, 0xaa00f34e, 0xb08f4417, 0x294267a5, 
-       0x86f97582, 0x1f345630, 0xdc63273d, 0x45ae048f, 0xea1516a8, 0x73d8351a, 
-       0xdf0a781a, 0x46c75ba8, 0xe97c498f, 0x70b16a3d, 0xb3e61b30, 0x2a2b3882, 
-       0x85902aa5, 0x1c5d0917, 0x06d2be4e, 0x9f1f9dfc, 0x30a48fdb, 0xa969ac69, 
-       0x6a3edd64, 0xf3f3fed6, 0x5c48ecf1, 0xc585cf43, 0xd2af0486, 0x4b622734, 
-       0xe4d93513, 0x7d1416a1, 0xbe4367ac, 0x278e441e, 0x88355639, 0x11f8758b, 
-       0x0b77c2d2, 0x92bae160, 0x3d01f347, 0xa4ccd0f5, 0x679ba1f8, 0xfe56824a, 
-       0x51ed906d, 0xc820b3df, 0x64f2fedf, 0xfd3fdd6d, 0x5284cf4a, 0xcb49ecf8, 
-       0x081e9df5, 0x91d3be47, 0x3e68ac60, 0xa7a58fd2, 0xbd2a388b, 0x24e71b39, 
-       0x8b5c091e, 0x12912aac, 0xd1c65ba1, 0x480b7813, 0xe7b06a34, 0x7e7d4986, 
-       0xbbf886c5, 0x2235a577, 0x8d8eb750, 0x144394e2, 0xd714e5ef, 0x4ed9c65d, 
-       0xe162d47a, 0x78aff7c8, 0x62204091, 0xfbed6323, 0x54567104, 0xcd9b52b6, 
-       0x0ecc23bb, 0x97010009, 0x38ba122e, 0xa177319c, 0x0da57c9c, 0x94685f2e, 
-       0x3bd34d09, 0xa21e6ebb, 0x61491fb6, 0xf8843c04, 0x573f2e23, 0xcef20d91, 
-       0xd47dbac8, 0x4db0997a, 0xe20b8b5d, 0x7bc6a8ef, 0xb891d9e2, 0x215cfa50, 
-       0x8ee7e877, 0x172acbc5, 0xa0b27ffd, 0x397f5c4f, 0x96c44e68, 0x0f096dda, 
-       0xcc5e1cd7, 0x55933f65, 0xfa282d42, 0x63e50ef0, 0x796ab9a9, 0xe0a79a1b, 
-       0x4f1c883c, 0xd6d1ab8e, 0x1586da83, 0x8c4bf931, 0x23f0eb16, 0xba3dc8a4, 
-       0x16ef85a4, 0x8f22a616, 0x2099b431, 0xb9549783, 0x7a03e68e, 0xe3cec53c, 
-       0x4c75d71b, 0xd5b8f4a9, 0xcf3743f0, 0x56fa6042, 0xf9417265, 0x608c51d7, 
-       0xa3db20da, 0x3a160368, 0x95ad114f, 0x0c6032fd, 0xc9e5fdbe, 0x5028de0c, 
-       0xff93cc2b, 0x665eef99, 0xa5099e94, 0x3cc4bd26, 0x937faf01, 0x0ab28cb3, 
-       0x103d3bea, 0x89f01858, 0x264b0a7f, 0xbf8629cd, 0x7cd158c0, 0xe51c7b72, 
-       0x4aa76955, 0xd36a4ae7, 0x7fb807e7, 0xe6752455, 0x49ce3672, 0xd00315c0, 
-       0x135464cd, 0x8a99477f, 0x25225558, 0xbcef76ea, 0xa660c1b3, 0x3fade201, 
-       0x9016f026, 0x09dbd394, 0xca8ca299, 0x5341812b, 0xfcfa930c, 0x6537b0be, 
-       0x721d7b7b, 0xebd058c9, 0x446b4aee, 0xdda6695c, 0x1ef11851, 0x873c3be3, 
-       0x288729c4, 0xb14a0a76, 0xabc5bd2f, 0x32089e9d, 0x9db38cba, 0x047eaf08, 
-       0xc729de05, 0x5ee4fdb7, 0xf15fef90, 0x6892cc22, 0xc4408122, 0x5d8da290, 
-       0xf236b0b7, 0x6bfb9305, 0xa8ace208, 0x3161c1ba, 0x9edad39d, 0x0717f02f, 
-       0x1d984776, 0x845564c4, 0x2bee76e3, 0xb2235551, 0x7174245c, 0xe8b907ee, 
-       0x470215c9, 0xdecf367b, 0x1b4af938, 0x8287da8a, 0x2d3cc8ad, 0xb4f1eb1f, 
-       0x77a69a12, 0xee6bb9a0, 0x41d0ab87, 0xd81d8835, 0xc2923f6c, 0x5b5f1cde, 
-       0xf4e40ef9, 0x6d292d4b, 0xae7e5c46, 0x37b37ff4, 0x98086dd3, 0x01c54e61, 
-       0xad170361, 0x34da20d3, 0x9b6132f4, 0x02ac1146, 0xc1fb604b, 0x583643f9, 
-       0xf78d51de, 0x6e40726c, 0x74cfc535, 0xed02e687, 0x42b9f4a0, 0xdb74d712, 
-       0x1823a61f, 0x81ee85ad, 0x2e55978a, 0xb798b438
-};
-
-static uint32_t crcc_zero_expect[] = {
-       0x00000000, 0x00000000, 0x00000000, 0x00000000,
-};
 
+/* Expected CRCs of 4 of each char. */
 static uint32_t crc_ieee_expect[] = {
        0x2144df1c, 0xf626d399, 0x54f1c057, 0x8393ccd2, 0xca2ee18a, 0x1d4ced0f,
        0xbf9bfec1, 0x68f9f244, 0x2ce1a471, 0xfb83a8f4, 0x5954bb3a, 0x8e36b7bf,
@@ -251,9 +135,7 @@ static void test_crc64(void)
 
 int main(int argc, char *argv[])
 {
-       plan_tests(517 * 2 + 2);
-       test_crc32(crc32c, crc32c_table,
-                  crcc_zero_expect, crcc_expect, crc32c_tab);
+       plan_tests(517 + 2);
        test_crc32(crc32_ieee, crc32_ieee_table,
                   crc_ieee_zero_expect, crc_ieee_expect, crc32_ieee_tab);
        test_crc64();