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45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/* 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 ofb_getiv.c
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OFB implementation, get IV, Tom St Denis
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*/
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#ifdef LTC_OFB_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 ofb The OFB state
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@return CRYPT_OK if successful
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*/
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int ofb_getiv(unsigned char *IV, unsigned long *len, symmetric_OFB *ofb)
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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(ofb != NULL);
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if ((unsigned long)ofb->blocklen > *len) {
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*len = ofb->blocklen;
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return CRYPT_BUFFER_OVERFLOW;
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}
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XMEMCPY(IV, ofb->IV, ofb->blocklen);
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*len = ofb->blocklen;
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return CRYPT_OK;
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}
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#endif
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/* ref: HEAD -> master, tag: v1.18.2 */
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/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
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/* commit time: 2018-07-01 22:49:01 +0200 */
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