Mercurial > dropbear
diff cfb_setiv.c @ 15:6362d3854bb4 libtomcrypt-orig
0.96 release of LibTomCrypt
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 15 Jun 2004 14:07:21 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/cfb_setiv.c Tue Jun 15 14:07:21 2004 +0000 @@ -0,0 +1,39 @@ +/* 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, [email protected], 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 +