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3
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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 /* Submited by Dobes Vandermeer ([email protected]) */ |
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12 |
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13 #include "mycrypt.h" |
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14 |
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15 #ifdef HMAC |
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16 |
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17 int hmac_memory(int hash, const unsigned char *key, unsigned long keylen, |
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18 const unsigned char *data, unsigned long len, |
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19 unsigned char *dst, unsigned long *dstlen) |
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20 { |
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143
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21 hmac_state *hmac; |
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3
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22 int err; |
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23 |
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24 _ARGCHK(key != NULL); |
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25 _ARGCHK(data != NULL); |
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26 _ARGCHK(dst != NULL); |
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27 _ARGCHK(dstlen != NULL); |
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143
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28 |
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29 /* allocate ram for hmac state */ |
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30 hmac = XMALLOC(sizeof(hmac_state)); |
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31 if (hmac == NULL) { |
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32 return CRYPT_MEM; |
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3
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33 } |
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34 |
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143
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35 if ((err = hmac_init(hmac, hash, key, keylen)) != CRYPT_OK) { |
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36 goto __ERR; |
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3
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37 } |
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38 |
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143
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39 if ((err = hmac_process(hmac, data, len)) != CRYPT_OK) { |
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40 goto __ERR; |
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41 } |
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42 |
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43 if ((err = hmac_done(hmac, dst, dstlen)) != CRYPT_OK) { |
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44 goto __ERR; |
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3
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45 } |
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46 |
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143
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47 err = CRYPT_OK; |
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48 __ERR: |
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49 #ifdef CLEAN_STACK |
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50 zeromem(hmac, sizeof(hmac_state)); |
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51 #endif |
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52 |
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53 XFREE(hmac); |
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54 return err; |
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3
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55 } |
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56 |
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57 #endif |
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58 |
