Mercurial > dropbear
view libtomcrypt/src/mac/omac/omac_file.c @ 1215:d058e15ea213
A few minor style fixes
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 15 Dec 2015 22:09:55 +0800 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
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/* 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 omac_file.c OMAC1 support, process a file, Tom St Denis */ #ifdef LTC_OMAC /** OMAC 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 OMAC @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 omac_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; omac_state omac; 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 = omac_init(&omac, cipher, key, keylen)) != CRYPT_OK) { fclose(in); return err; } do { x = fread(buf, 1, sizeof(buf), in); if ((err = omac_process(&omac, buf, x)) != CRYPT_OK) { fclose(in); return err; } } while (x == sizeof(buf)); fclose(in); if ((err = omac_done(&omac, 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/omac/omac_file.c,v $ */ /* $Revision: 1.5 $ */ /* $Date: 2006/11/03 00:39:49 $ */