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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 /* EAX Implementation by Tom St Denis */ |
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13 #include "mycrypt.h" |
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14 |
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15 #ifdef EAX_MODE |
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16 |
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17 int eax_encrypt_authenticate_memory(int cipher, |
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18 const unsigned char *key, unsigned long keylen, |
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19 const unsigned char *nonce, unsigned long noncelen, |
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20 const unsigned char *header, unsigned long headerlen, |
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21 const unsigned char *pt, unsigned long ptlen, |
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22 unsigned char *ct, |
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23 unsigned char *tag, unsigned long *taglen) |
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24 { |
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25 int err; |
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143
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26 eax_state *eax; |
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3
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27 |
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143
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28 eax = XMALLOC(sizeof(eax_state)); |
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29 |
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30 if ((err = eax_init(eax, cipher, key, keylen, nonce, noncelen, header, headerlen)) != CRYPT_OK) { |
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31 goto __ERR; |
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3
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32 } |
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33 |
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143
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34 if ((err = eax_encrypt(eax, pt, ct, ptlen)) != CRYPT_OK) { |
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35 goto __ERR; |
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3
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36 } |
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37 |
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143
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38 if ((err = eax_done(eax, tag, taglen)) != CRYPT_OK) { |
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39 goto __ERR; |
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3
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40 } |
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41 |
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143
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42 err = CRYPT_OK; |
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43 __ERR: |
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44 #ifdef CLEAN_STACK |
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45 zeromem(eax, sizeof(eax_state)); |
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46 #endif |
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47 |
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48 XFREE(eax); |
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49 |
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50 return err; |
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3
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51 } |
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52 |
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53 #endif |
