Mercurial > dropbear
view libtomcrypt/src/mac/omac/omac_memory.c @ 410:b895f91c2ee6
merge of 'b1dd3b94e60a07a176dba2b035ac79968595990a'
and 'bcb33fce2fad01a7626598209d43af3571bd86f0'
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 04 Feb 2007 10:32:59 +0000 |
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_memory.c OMAC1 support, process a block of memory, Tom St Denis */ #ifdef LTC_OMAC /** OMAC a block of memory @param cipher The index of the desired cipher @param key The secret key @param keylen The length of the secret key (octets) @param in The data to send through OMAC @param inlen The length of the data to send through OMAC (octets) @param out [out] The destination of the authentication tag @param outlen [in/out] The max size and resulting size of the authentication tag (octets) @return CRYPT_OK if successful */ int omac_memory(int cipher, const unsigned char *key, unsigned long keylen, const unsigned char *in, unsigned long inlen, unsigned char *out, unsigned long *outlen) { int err; omac_state *omac; LTC_ARGCHK(key != NULL); LTC_ARGCHK(in != NULL); LTC_ARGCHK(out != NULL); LTC_ARGCHK(outlen != NULL); /* is the cipher valid? */ if ((err = cipher_is_valid(cipher)) != CRYPT_OK) { return err; } /* Use accelerator if found */ if (cipher_descriptor[cipher].omac_memory != NULL) { return cipher_descriptor[cipher].omac_memory(key, keylen, in, inlen, out, outlen); } /* allocate ram for omac state */ omac = XMALLOC(sizeof(omac_state)); if (omac == NULL) { return CRYPT_MEM; } /* omac process the message */ if ((err = omac_init(omac, cipher, key, keylen)) != CRYPT_OK) { goto LBL_ERR; } if ((err = omac_process(omac, in, inlen)) != CRYPT_OK) { goto LBL_ERR; } if ((err = omac_done(omac, out, outlen)) != CRYPT_OK) { goto LBL_ERR; } err = CRYPT_OK; LBL_ERR: #ifdef LTC_CLEAN_STACK zeromem(omac, sizeof(omac_state)); #endif XFREE(omac); return err; } #endif /* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_memory.c,v $ */ /* $Revision: 1.6 $ */ /* $Date: 2006/11/08 23:01:06 $ */