40 lines
962 B
C
40 lines
962 B
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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#include "tomcrypt_private.h"
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/**
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@file lrw_decrypt.c
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LRW_MODE implementation, Decrypt blocks, Tom St Denis
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*/
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#ifdef LTC_LRW_MODE
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/**
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LRW decrypt blocks
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@param ct The ciphertext
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@param pt [out] The plaintext
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@param len The length in octets, must be a multiple of 16
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@param lrw The LRW state
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*/
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int lrw_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_LRW *lrw)
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{
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int err;
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LTC_ARGCHK(pt != NULL);
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LTC_ARGCHK(ct != NULL);
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LTC_ARGCHK(lrw != NULL);
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if ((err = cipher_is_valid(lrw->cipher)) != CRYPT_OK) {
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return err;
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}
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if (cipher_descriptor[lrw->cipher].accel_lrw_decrypt != NULL) {
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return cipher_descriptor[lrw->cipher].accel_lrw_decrypt(ct, pt, len, lrw->IV, lrw->tweak, &lrw->key);
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}
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return lrw_process(ct, pt, len, LRW_DECRYPT, lrw);
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}
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#endif
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