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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 /* OMAC1 Support by Tom St Denis (for 64 and 128 bit block ciphers only) */ |
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12 #include "mycrypt.h" |
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13 |
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14 #ifdef OMAC |
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15 |
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16 int omac_memory(int cipher, |
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17 const unsigned char *key, unsigned long keylen, |
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18 const unsigned char *msg, unsigned long msglen, |
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19 unsigned char *out, unsigned long *outlen) |
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20 { |
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21 int err; |
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22 omac_state omac; |
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23 |
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24 _ARGCHK(key != NULL); |
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25 _ARGCHK(msg != NULL); |
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26 _ARGCHK(out != NULL); |
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27 _ARGCHK(outlen != NULL); |
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28 |
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29 if ((err = omac_init(&omac, cipher, key, keylen)) != CRYPT_OK) { |
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30 return err; |
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31 } |
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32 if ((err = omac_process(&omac, msg, msglen)) != CRYPT_OK) { |
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33 return err; |
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34 } |
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35 if ((err = omac_done(&omac, out, outlen)) != CRYPT_OK) { |
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36 return err; |
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37 } |
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38 |
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39 return CRYPT_OK; |
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40 } |
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41 |
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42 #endif |
