1 #pragma ident "%Z%%M% %I% %E% SMI" 2 /* 3 * Copyright (C) 1998 by the FundsXpress, INC. 4 * 5 * All rights reserved. 6 * 7 * Export of this software from the United States of America may require 8 * a specific license from the United States Government. It is the 9 * responsibility of any person or organization contemplating export to 10 * obtain such a license before exporting. 11 * 12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 13 * distribute this software and its documentation for any purpose and 14 * without fee is hereby granted, provided that the above copyright 15 * notice appear in all copies and that both that copyright notice and 16 * this permission notice appear in supporting documentation, and that 17 * the name of FundsXpress. not be used in advertising or publicity pertaining 18 * to distribution of the software without specific, written prior 19 * permission. FundsXpress makes no representations about the suitability of 20 * this software for any purpose. It is provided "as is" without express 21 * or implied warranty. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 25 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 26 */ 27 28 #include <k5-int.h> 29 #include <gssapiP_krb5.h> 30 #include <crc-32.h> 31 #include <hash_provider.h> 32 33 /* ARGSUSED */ 34 static krb5_error_code 35 k5_crc32_hash(krb5_context context, 36 unsigned int icount, krb5_const krb5_data *input, 37 krb5_data *output) 38 { 39 unsigned long c, cn; 40 int i; 41 42 if (output->length != CRC32_CKSUM_LENGTH) 43 return(KRB5_CRYPTO_INTERNAL); 44 45 c = 0; 46 for (i=0; i<icount; i++) { 47 mit_crc32(input[i].data, input[i].length, &cn); 48 c ^= cn; 49 } 50 51 output->data[0] = c&0xff; 52 output->data[1] = (c>>8)&0xff; 53 output->data[2] = (c>>16)&0xff; 54 output->data[3] = (c>>24)&0xff; 55 56 return(0); 57 } 58 59 const struct krb5_hash_provider krb5_hash_crc32 = { 60 CRC32_CKSUM_LENGTH, 61 1, 62 k5_crc32_hash 63 }; 64