Mercurial > dropbear
view src/mac/pmac/pmac_file.c @ 230:809b681a9af5 libtomcrypt
- check for generic AES/TWOFISH settings from Dropbear, not AES128 etc
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Tue, 30 Aug 2005 17:40:30 +0000 |
parents | 39d5d58461d6 |
children |
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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.org */ #include "tomcrypt.h" /** @file pmac_file.c PMAC implementation, process a file, by Tom St Denis */ #ifdef PMAC /** PMAC 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 to send through PMAC @param out [out] Destination for the authentication tag @param outlen [in/out] Max size and resulting size of the authentication tag @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled */ int pmac_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; pmac_state pmac; 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 = pmac_init(&pmac, cipher, key, keylen)) != CRYPT_OK) { fclose(in); return err; } do { x = fread(buf, 1, sizeof(buf), in); if ((err = pmac_process(&pmac, buf, x)) != CRYPT_OK) { fclose(in); return err; } } while (x == sizeof(buf)); fclose(in); if ((err = pmac_done(&pmac, 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/pmac/pmac_file.c,v $ */ /* $Revision: 1.3 $ */ /* $Date: 2005/05/05 14:35:59 $ */