2 * Copyright (c) 1997 - 2000 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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34 /* RCSID("$Heimdal: crc.c,v 1.9 2000/08/03 01:45:14 assar Exp $"); */
36 #include <afsconfig.h>
38 #include "../afs/param.h"
40 #include <afs/param.h>
47 #include "../afs/sysincludes.h"
48 #include "../afs/afsincludes.h"
49 #include "../afs/stds.h"
50 #include "../rx/xdr.h"
52 #include "../des/des.h"
53 #include "../afs/lifetimes.h"
54 #include "../afs/rxkad.h"
55 #else /* defined(UKERNEL) */
57 #include <sys/types.h>
61 #include <netinet/in.h>
73 #include "lifetimes.h"
75 #endif /* defined(UKERNEL) */
77 static u_long table[256];
79 #define CRC_GEN 0xEDB88320L
82 _rxkad_crc_init_table(void)
85 unsigned long crc, poly;
91 for (i = 0; i < 256; i++) {
93 for (j = 8; j > 0; j--) {
95 crc = (crc >> 1) ^ poly;
106 _rxkad_crc_update(const char *p, size_t len, afs_uint32 res)
109 res = table[(res ^ *p++) & 0xFF] ^ (res >> 8);
110 return res & 0xFFFFFFFF;