Mercurial > dropbear
annotate libtomcrypt/src/encauth/eax/eax_decrypt.c @ 758:1c607a62d235 ecc
Set LTC_SOURCE for proper ltm_desc etc
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 29 Mar 2013 00:26:46 +0800 (2013-03-28) |
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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, tomstdenis@gmail.com, http://libtomcrypt.com |
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10 */ |
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11 |
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12 /** |
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13 @file eax_decrypt.c |
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14 EAX implementation, decrypt block, by Tom St Denis |
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15 */ |
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16 #include "tomcrypt.h" |
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17 |
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18 #ifdef EAX_MODE |
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19 |
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20 /** |
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21 Decrypt data with the EAX protocol |
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22 @param eax The EAX state |
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23 @param ct The ciphertext |
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24 @param pt [out] The plaintext |
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25 @param length The length (octets) of the ciphertext |
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26 @return CRYPT_OK if successful |
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27 */ |
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28 int eax_decrypt(eax_state *eax, const unsigned char *ct, unsigned char *pt, |
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29 unsigned long length) |
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30 { |
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31 int err; |
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32 |
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33 LTC_ARGCHK(eax != NULL); |
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34 LTC_ARGCHK(pt != NULL); |
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35 LTC_ARGCHK(ct != NULL); |
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36 |
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37 /* omac ciphertext */ |
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38 if ((err = omac_process(&eax->ctomac, ct, length)) != CRYPT_OK) { |
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39 return err; |
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40 } |
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41 |
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42 /* decrypt */ |
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43 return ctr_decrypt(ct, pt, length, &eax->ctr); |
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44 } |
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45 |
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46 #endif |
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47 |
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48 /* $Source: /cvs/libtom/libtomcrypt/src/encauth/eax/eax_decrypt.c,v $ */ |
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49 /* $Revision: 1.4 $ */ |
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50 /* $Date: 2006/03/31 14:15:35 $ */ |