Mercurial > dropbear
annotate libtomcrypt/src/hashes/helper/hash_memory.c @ 553:8711f20b89ab
- For uclinux, only cleanup on exit for the main process. This avoids
trashing the state when a failing child exits.
author | Matt Johnston <matt@ucc.asn.au> |
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date | Thu, 09 Jul 2009 16:01:30 +0000 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
rev | line source |
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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 hash_memory.c |
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15 Hash memory helper, Tom St Denis |
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16 */ |
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17 |
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18 /** |
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19 Hash a block of memory and store the digest. |
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20 @param hash The index of the hash you wish to use |
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21 @param in The data you wish to hash |
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22 @param inlen The length of the data to hash (octets) |
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23 @param out [out] Where to store the digest |
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24 @param outlen [in/out] Max size and resulting size of the digest |
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25 @return CRYPT_OK if successful |
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26 */ |
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27 int hash_memory(int hash, const unsigned char *in, unsigned long inlen, unsigned char *out, unsigned long *outlen) |
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28 { |
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29 hash_state *md; |
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30 int err; |
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31 |
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32 LTC_ARGCHK(in != NULL); |
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33 LTC_ARGCHK(out != NULL); |
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34 LTC_ARGCHK(outlen != NULL); |
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35 |
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36 if ((err = hash_is_valid(hash)) != CRYPT_OK) { |
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37 return err; |
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38 } |
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39 |
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40 if (*outlen < hash_descriptor[hash].hashsize) { |
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41 *outlen = hash_descriptor[hash].hashsize; |
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42 return CRYPT_BUFFER_OVERFLOW; |
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43 } |
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44 |
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45 md = XMALLOC(sizeof(hash_state)); |
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46 if (md == NULL) { |
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47 return CRYPT_MEM; |
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48 } |
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49 |
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50 if ((err = hash_descriptor[hash].init(md)) != CRYPT_OK) { |
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51 goto LBL_ERR; |
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52 } |
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53 if ((err = hash_descriptor[hash].process(md, in, inlen)) != CRYPT_OK) { |
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54 goto LBL_ERR; |
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55 } |
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56 err = hash_descriptor[hash].done(md, out); |
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57 *outlen = hash_descriptor[hash].hashsize; |
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58 LBL_ERR: |
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59 #ifdef LTC_CLEAN_STACK |
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60 zeromem(md, sizeof(hash_state)); |
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61 #endif |
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62 XFREE(md); |
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63 |
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64 return err; |
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65 } |
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66 |
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67 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/helper/hash_memory.c,v $ */ |
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68 /* $Revision: 1.5 $ */ |
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69 /* $Date: 2006/06/16 21:53:41 $ */ |