annotate libtomcrypt/src/encauth/ocb/ocb_decrypt.c @ 1204:d2f9ef67af15

diffie-hellman-group14-sha256
author Matt Johnston <matt@ucc.asn.au>
date Fri, 11 Dec 2015 22:12:12 +0800
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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 * Tom St Denis, [email protected], http://libtomcrypt.com
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10 */
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12 /**
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13 @file ocb_decrypt.c
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14 OCB implementation, decrypt data, by Tom St Denis
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15 */
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16 #include "tomcrypt.h"
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18 #ifdef OCB_MODE
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20 /**
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21 Decrypt a block with OCB.
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22 @param ocb The OCB state
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23 @param ct The ciphertext (length of the block size of the block cipher)
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24 @param pt [out] The plaintext (length of ct)
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25 @return CRYPT_OK if successful
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26 */
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27 int ocb_decrypt(ocb_state *ocb, const unsigned char *ct, unsigned char *pt)
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28 {
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29 unsigned char Z[MAXBLOCKSIZE], tmp[MAXBLOCKSIZE];
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30 int err, x;
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32 LTC_ARGCHK(ocb != NULL);
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33 LTC_ARGCHK(pt != NULL);
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