Mercurial > dropbear
view libtomcrypt/src/modes/ctr/ctr_setiv.c @ 1938:77bc00dcc19f default tip main master
Bump version to 2022.82
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Fri, 01 Apr 2022 14:43:27 +0800 |
parents | 6dba84798cd5 |
children |
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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. */ #include "tomcrypt.h" /** @file ctr_setiv.c CTR implementation, set IV, Tom St Denis */ #ifdef LTC_CTR_MODE /** Set an initialization vector @param IV The initialization vector @param len The length of the vector (in octets) @param ctr The CTR state @return CRYPT_OK if successful */ int ctr_setiv(const unsigned char *IV, unsigned long len, symmetric_CTR *ctr) { int err; LTC_ARGCHK(IV != NULL); LTC_ARGCHK(ctr != NULL); /* bad param? */ if ((err = cipher_is_valid(ctr->cipher)) != CRYPT_OK) { return err; } if (len != (unsigned long)ctr->blocklen) { return CRYPT_INVALID_ARG; } /* set IV */ XMEMCPY(ctr->ctr, IV, len); /* force next block */ ctr->padlen = 0; return cipher_descriptor[ctr->cipher].ecb_encrypt(IV, ctr->pad, &ctr->key); } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */