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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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11 #include "tomcrypt.h" |
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12 |
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13 /** |
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14 @file lrw_getiv.c |
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15 LRW_MODE implementation, Retrieve the current IV, Tom St Denis |
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16 */ |
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17 |
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18 #ifdef LTC_LRW_MODE |
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19 |
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20 /** |
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21 Get the IV for LRW |
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22 @param IV [out] The IV, must be 16 octets |
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23 @param len Length ... must be at least 16 :-) |
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24 @param lrw The LRW state to read |
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25 @return CRYPT_OK if successful |
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26 */ |
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27 int lrw_getiv(unsigned char *IV, unsigned long *len, symmetric_LRW *lrw) |
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28 { |
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29 LTC_ARGCHK(IV != NULL); |
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30 LTC_ARGCHK(len != NULL); |
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31 LTC_ARGCHK(lrw != NULL); |
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32 if (*len < 16) { |
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33 *len = 16; |
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34 return CRYPT_BUFFER_OVERFLOW; |
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35 } |
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36 |
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37 XMEMCPY(IV, lrw->IV, 16); |
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38 *len = 16; |
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39 return CRYPT_OK; |
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40 } |
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41 |
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42 #endif |
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43 /* $Source: /cvs/libtom/libtomcrypt/src/modes/lrw/lrw_getiv.c,v $ */ |
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44 /* $Revision: 1.9 $ */ |
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45 /* $Date: 2006/06/29 01:53:13 $ */ |
