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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@gmail.com, http://libtomcrypt.com
10  */
11 #include "tomcrypt.h"
12 
13 /**
14    @file ofb_getiv.c
15    F8 implementation, get IV, Tom St Denis
16 */
17 
18 #ifdef LTC_F8_MODE
19 
20 /**
21    Get the current initial vector
22    @param IV   [out] The destination of the initial vector
23    @param len  [in/out]  The max size and resulting size of the initial vector
24    @param f8   The F8 state
25    @return CRYPT_OK if successful
26 */
f8_getiv(unsigned char * IV,unsigned long * len,symmetric_F8 * f8)27 int f8_getiv(unsigned char *IV, unsigned long *len, symmetric_F8 *f8)
28 {
29    LTC_ARGCHK(IV  != NULL);
30    LTC_ARGCHK(len != NULL);
31    LTC_ARGCHK(f8  != NULL);
32    if ((unsigned long)f8->blocklen > *len) {
33       *len = f8->blocklen;
34       return CRYPT_BUFFER_OVERFLOW;
35    }
36    XMEMCPY(IV, f8->IV, f8->blocklen);
37    *len = f8->blocklen;
38 
39    return CRYPT_OK;
40 }
41 
42 #endif
43 
44 /* $Source: /cvs/libtom/libtomcrypt/src/modes/f8/f8_getiv.c,v $ */
45 /* $Revision: 1.2 $ */
46 /* $Date: 2006/06/16 22:49:25 $ */
47