diff options
Diffstat (limited to 'libtomcrypt/src/modes/cfb/cfb_getiv.c')
| -rw-r--r-- | libtomcrypt/src/modes/cfb/cfb_getiv.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libtomcrypt/src/modes/cfb/cfb_getiv.c b/libtomcrypt/src/modes/cfb/cfb_getiv.c new file mode 100644 index 0000000..1689a75 --- /dev/null +++ b/libtomcrypt/src/modes/cfb/cfb_getiv.c @@ -0,0 +1,46 @@ +/* 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, tomstdenis@gmail.com, http://libtomcrypt.com + */ +#include "tomcrypt.h" + +/** + @file cfb_getiv.c + CFB implementation, get IV, Tom St Denis +*/ + +#ifdef LTC_CFB_MODE + +/** + Get the current initial vector + @param IV [out] The destination of the initial vector + @param len [in/out] The max size and resulting size of the initial vector + @param cfb The CFB state + @return CRYPT_OK if successful +*/ +int cfb_getiv(unsigned char *IV, unsigned long *len, symmetric_CFB *cfb) +{ + LTC_ARGCHK(IV != NULL); + LTC_ARGCHK(len != NULL); + LTC_ARGCHK(cfb != NULL); + if ((unsigned long)cfb->blocklen > *len) { + *len = cfb->blocklen; + return CRYPT_BUFFER_OVERFLOW; + } + XMEMCPY(IV, cfb->IV, cfb->blocklen); + *len = cfb->blocklen; + + return CRYPT_OK; +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_getiv.c,v $ */ +/* $Revision: 1.6 $ */ +/* $Date: 2006/06/29 01:51:34 $ */ |