1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis 2 * 3 * LibTomCrypt is a library that provides various cryptographic 4 * algorithms in a highly modular and flexible manner. 5 * 6 * The library is free for all purposes without any express 7 * guarantee it works. 8 * 9 * Tom St Denis, tomstdenis (at) gmail.com, http://libtomcrypt.com 10 */ 11 #include "tomcrypt.h" 12 13 /** 14 @file pmac_memory.c 15 PMAC implementation, process a block of memory, by Tom St Denis 16 */ 17 18 #ifdef LTC_PMAC 19 20 /** 21 PMAC a block of memory 22 @param cipher The index of the cipher desired 23 @param key The secret key 24 @param keylen The length of the secret key (octets) 25 @param in The data you wish to send through PMAC 26 @param inlen The length of data you wish to send through PMAC (octets) 27 @param out [out] Destination for the authentication tag 28 @param outlen [in/out] The max size and resulting size of the authentication tag 29 @return CRYPT_OK if successful 30 */ 31 int pmac_memory(int cipher, 32 const unsigned char *key, unsigned long keylen, 33 const unsigned char *in, unsigned long inlen, 34 unsigned char *out, unsigned long *outlen) 35 { 36 int err; 37 pmac_state *pmac; 38 39 LTC_ARGCHK(key != NULL); 40 LTC_ARGCHK(in != NULL); 41 LTC_ARGCHK(out != NULL); 42 LTC_ARGCHK(outlen != NULL); 43 44 /* allocate ram for pmac state */ 45 pmac = XMALLOC(sizeof(pmac_state)); 46 if (pmac == NULL) { 47 return CRYPT_MEM; 48 } 49 50 if ((err = pmac_init(pmac, cipher, key, keylen)) != CRYPT_OK) { 51 goto LBL_ERR; 52 } 53 if ((err = pmac_process(pmac, in, inlen)) != CRYPT_OK) { 54 goto LBL_ERR; 55 } 56 if ((err = pmac_done(pmac, out, outlen)) != CRYPT_OK) { 57 goto LBL_ERR; 58 } 59 60 err = CRYPT_OK; 61 LBL_ERR: 62 #ifdef LTC_CLEAN_STACK 63 zeromem(pmac, sizeof(pmac_state)); 64 #endif 65 66 XFREE(pmac); 67 return err; 68 } 69 70 #endif 71 72 /* $Source: /cvs/libtom/libtomcrypt/src/mac/pmac/pmac_memory.c,v $ */ 73 /* $Revision: 1.5 $ */ 74 /* $Date: 2006/11/03 00:39:49 $ */ 75
