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46 lines
1.1 KiB
46 lines
1.1 KiB
#define LTC_SOURCE
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*/
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#include "tomcrypt.h"
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/**
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@file cfb_getiv.c
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CFB implementation, get IV, Tom St Denis
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*/
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#ifdef LTC_CFB_MODE
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/**
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Get the current initialization vector
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@param IV [out] The destination of the initialization vector
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@param len [in/out] The max size and resulting size of the initialization vector
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@param cfb The CFB state
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@return CRYPT_OK if successful
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*/
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int cfb_getiv(unsigned char *IV, unsigned long *len, symmetric_CFB *cfb)
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{
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LTC_ARGCHK(IV != NULL);
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LTC_ARGCHK(len != NULL);
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LTC_ARGCHK(cfb != NULL);
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if ((unsigned long)cfb->blocklen > *len) {
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*len = cfb->blocklen;
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return CRYPT_BUFFER_OVERFLOW;
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}
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XMEMCPY(IV, cfb->IV, cfb->blocklen);
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*len = cfb->blocklen;
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return CRYPT_OK;
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}
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#endif
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/* ref: $Format:%D$ */
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/* git commit: $Format:%H$ */
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/* commit time: $Format:%ai$ */
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