Mercurial > dropbear

annotate libtomcrypt/src/modes/lrw/lrw_decrypt.c @ 1868:66a3fabe4870

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merge
author Matt Johnston <matt@ucc.asn.au>
date Tue, 01 Feb 2022 15:51:01 +0800
parents 6dba84798cd5
children
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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9 #include "tomcrypt.h"
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10
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11 /**
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12 @file lrw_decrypt.c
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13 LRW_MODE implementation, Decrypt blocks, Tom St Denis
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14 */
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15
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16 #ifdef LTC_LRW_MODE
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18 /**
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19 LRW decrypt blocks
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20 @param ct The ciphertext
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21 @param pt [out] The plaintext
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22 @param len The length in octets, must be a multiple of 16
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23 @param lrw The LRW state
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24 */
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25 int lrw_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_LRW *lrw)
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26 {
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27 int err;
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28
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29 LTC_ARGCHK(pt != NULL);
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30 LTC_ARGCHK(ct != NULL);
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31 LTC_ARGCHK(lrw != NULL);
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32
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33 if ((err = cipher_is_valid(lrw->cipher)) != CRYPT_OK) {
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34 return err;
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35 }
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37 if (cipher_descriptor[lrw->cipher].accel_lrw_decrypt != NULL) {
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38 return cipher_descriptor[lrw->cipher].accel_lrw_decrypt(ct, pt, len, lrw->IV, lrw->tweak, &lrw->key);
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39 }
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40
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41 return lrw_process(ct, pt, len, LRW_DECRYPT, lrw);
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42 }
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45 #endif
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46
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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47 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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48 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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49 /* commit time: $Format:%ai$ */