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 xcbc_process.c 15 XCBC Support, XCBC-MAC a block of memory 16 */ 17 18 #ifdef LTC_XCBC 19 20 /** XCBC-MAC a block of memory 21 @param cipher Index of cipher to use 22 @param key [in] Secret key 23 @param keylen Length of key in octets 24 @param in [in] Message to MAC 25 @param inlen Length of input in octets 26 @param out [out] Destination for the MAC tag 27 @param outlen [in/out] Output size and final tag size 28 Return CRYPT_OK on success. 29 */ 30 int xcbc_memory(int cipher, 31 const unsigned char *key, unsigned long keylen, 32 const unsigned char *in, unsigned long inlen, 33 unsigned char *out, unsigned long *outlen) 34 { 35 xcbc_state *xcbc; 36 int err; 37 38 /* is the cipher valid? */ 39 if ((err = cipher_is_valid(cipher)) != CRYPT_OK) { 40 return err; 41 } 42 43 /* Use accelerator if found */ 44 if (cipher_descriptor[cipher].xcbc_memory != NULL) { 45 return cipher_descriptor[cipher].xcbc_memory(key, keylen, in, inlen, out, outlen); 46 } 47 48 xcbc = XCALLOC(1, sizeof(*xcbc)); 49 if (xcbc == NULL) { 50 return CRYPT_MEM; 51 } 52 53 if ((err = xcbc_init(xcbc, cipher, key, keylen)) != CRYPT_OK) { 54 goto done; 55 } 56 57 if ((err = xcbc_process(xcbc, in, inlen)) != CRYPT_OK) { 58 goto done; 59 } 60 61 err = xcbc_done(xcbc, out, outlen); 62 done: 63 XFREE(xcbc); 64 return err; 65 } 66 67 #endif 68 69 /* $Source: /cvs/libtom/libtomcrypt/src/mac/xcbc/xcbc_memory.c,v $ */ 70 /* $Revision: 1.4 $ */ 71 /* $Date: 2006/11/21 23:02:42 $ */ 72
