?? ofb_setiv.c
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/* 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 ofb_setiv.c OFB implementation, set IV, Tom St Denis*/#ifdef LTC_OFB_MODE/** Set an initial vector @param IV The initial vector @param len The length of the vector (in octets) @param ofb The OFB state @return CRYPT_OK if successful*/int ofb_setiv(const unsigned char *IV, unsigned long len, symmetric_OFB *ofb){ int err; LTC_ARGCHK(IV != NULL); if ((err = cipher_is_valid(ofb->cipher)) != CRYPT_OK) { return err; } if (len != (unsigned long)ofb->blocklen) { return CRYPT_INVALID_ARG; } /* force next block */ ofb->padlen = 0; return cipher_descriptor[ofb->cipher].ecb_encrypt(IV, ofb->IV, &ofb->key);}#endif /* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_setiv.c,v $ *//* $Revision: 1.6 $ *//* $Date: 2006/06/29 01:51:34 $ */
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