/* 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@iahu.ca, http://libtomcrypt.org */ #include "mycrypt.h" #ifdef CFB int cfb_setiv(const unsigned char *IV, unsigned long len, symmetric_CFB *cfb) { int err; _ARGCHK(IV != NULL); _ARGCHK(cfb != NULL); if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) { return err; } if (len != (unsigned long)cfb->blocklen) { return CRYPT_INVALID_ARG; } /* force next block */ cfb->padlen = 0; cipher_descriptor[cfb->cipher].ecb_encrypt(IV, cfb->IV, &cfb->key); return CRYPT_OK; } #endif