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comparison libtomcrypt/src/hashes/helper/hash_memory.c @ 399:a707e6148060

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merge of '5fdf69ca60d1683cdd9f4c2595134bed26394834' and '6b61c50f4cf888bea302ac8fcf5dbb573b443251'
author Matt Johnston <matt@ucc.asn.au>
date Sat, 03 Feb 2007 08:20:34 +0000
parents 0cbe8f6dbf9e
children f849a5ca2efc
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394:17d097fc111c 399:a707e6148060
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtomcrypt.com
10 */
11 #include "tomcrypt.h"
12
13 /**
14 @file hash_memory.c
15 Hash memory helper, Tom St Denis
16 */
17
18 /**
19 Hash a block of memory and store the digest.
20 @param hash The index of the hash you wish to use
21 @param in The data you wish to hash
22 @param inlen The length of the data to hash (octets)
23 @param out [out] Where to store the digest
24 @param outlen [in/out] Max size and resulting size of the digest
25 @return CRYPT_OK if successful
26 */
27 int hash_memory(int hash, const unsigned char *in, unsigned long inlen, unsigned char *out, unsigned long *outlen)
28 {
29 hash_state *md;
30 int err;
31
32 LTC_ARGCHK(in != NULL);
33 LTC_ARGCHK(out != NULL);
34 LTC_ARGCHK(outlen != NULL);
35
36 if ((err = hash_is_valid(hash)) != CRYPT_OK) {
37 return err;
38 }
39
40 if (*outlen < hash_descriptor[hash].hashsize) {
41 *outlen = hash_descriptor[hash].hashsize;
42 return CRYPT_BUFFER_OVERFLOW;
43 }
44
45 md = XMALLOC(sizeof(hash_state));
46 if (md == NULL) {
47 return CRYPT_MEM;
48 }
49
50 if ((err = hash_descriptor[hash].init(md)) != CRYPT_OK) {
51 goto LBL_ERR;
52 }
53 if ((err = hash_descriptor[hash].process(md, in, inlen)) != CRYPT_OK) {
54 goto LBL_ERR;
55 }
56 err = hash_descriptor[hash].done(md, out);
57 *outlen = hash_descriptor[hash].hashsize;
58 LBL_ERR:
59 #ifdef LTC_CLEAN_STACK
60 zeromem(md, sizeof(hash_state));
61 #endif
62 XFREE(md);
63
64 return err;
65 }
66
67 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/helper/hash_memory.c,v $ */
68 /* $Revision: 1.5 $ */
69 /* $Date: 2006/06/16 21:53:41 $ */