Mercurial > dropbear
view libtomcrypt/src/mac/xcbc/xcbc_file.c @ 410:b895f91c2ee6
merge of 'b1dd3b94e60a07a176dba2b035ac79968595990a'
and 'bcb33fce2fad01a7626598209d43af3571bd86f0'
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Sun, 04 Feb 2007 10:32:59 +0000 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
line wrap: on
line source
/* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, [email protected], http://libtomcrypt.com */ #include "tomcrypt.h" /** @file xcbc_file.c XCBC support, process a file, Tom St Denis */ #ifdef LTC_XCBC /** XCBC a file @param cipher The index of the cipher desired @param key The secret key @param keylen The length of the secret key (octets) @param filename The name of the file you wish to XCBC @param out [out] Where the authentication tag is to be stored @param outlen [in/out] The max size and resulting size of the authentication tag @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled */ int xcbc_file(int cipher, const unsigned char *key, unsigned long keylen, const char *filename, unsigned char *out, unsigned long *outlen) { #ifdef LTC_NO_FILE return CRYPT_NOP; #else int err, x; xcbc_state xcbc; FILE *in; unsigned char buf[512]; LTC_ARGCHK(key != NULL); LTC_ARGCHK(filename != NULL); LTC_ARGCHK(out != NULL); LTC_ARGCHK(outlen != NULL); in = fopen(filename, "rb"); if (in == NULL) { return CRYPT_FILE_NOTFOUND; } if ((err = xcbc_init(&xcbc, cipher, key, keylen)) != CRYPT_OK) { fclose(in); return err; } do { x = fread(buf, 1, sizeof(buf), in); if ((err = xcbc_process(&xcbc, buf, x)) != CRYPT_OK) { fclose(in); return err; } } while (x == sizeof(buf)); fclose(in); if ((err = xcbc_done(&xcbc, out, outlen)) != CRYPT_OK) { return err; } #ifdef LTC_CLEAN_STACK zeromem(buf, sizeof(buf)); #endif return CRYPT_OK; #endif } #endif /* $Source: /cvs/libtom/libtomcrypt/src/mac/xcbc/xcbc_file.c,v $ */ /* $Revision: 1.1 $ */ /* $Date: 2006/11/03 01:56:41 $ */