15
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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.org |
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10 */ |
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11 |
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12 #include "mycrypt.h" |
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13 |
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14 #ifdef CTR |
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15 |
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16 int ctr_getiv(unsigned char *IV, unsigned long *len, symmetric_CTR *ctr) |
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17 { |
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18 _ARGCHK(IV != NULL); |
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19 _ARGCHK(len != NULL); |
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20 _ARGCHK(ctr != NULL); |
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21 if ((unsigned long)ctr->blocklen > *len) { |
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22 return CRYPT_BUFFER_OVERFLOW; |
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23 } |
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24 memcpy(IV, ctr->ctr, ctr->blocklen); |
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25 *len = ctr->blocklen; |
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26 |
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27 return CRYPT_OK; |
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28 } |
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29 |
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30 #endif |