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comparison libtomcrypt/src/hashes/helper/hash_memory.c @ 285:1b9e69c058d2

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propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 13:23:58 +0000
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children 0cbe8f6dbf9e
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281:997e6f7dc01e 285:1b9e69c058d2
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.org
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 return CRYPT_BUFFER_OVERFLOW;
42 }
43
44 md = XMALLOC(sizeof(hash_state));
45 if (md == NULL) {
46 return CRYPT_MEM;
47 }
48
49 if ((err = hash_descriptor[hash].init(md)) != CRYPT_OK) {
50 goto LBL_ERR;
51 }
52 if ((err = hash_descriptor[hash].process(md, in, inlen)) != CRYPT_OK) {
53 goto LBL_ERR;
54 }
55 err = hash_descriptor[hash].done(md, out);
56 *outlen = hash_descriptor[hash].hashsize;
57 LBL_ERR:
58 #ifdef LTC_CLEAN_STACK
59 zeromem(md, sizeof(hash_state));
60 #endif
61 XFREE(md);
62
63 return err;
64 }
65
66 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/helper/hash_memory.c,v $ */
67 /* $Revision: 1.3 $ */
68 /* $Date: 2005/05/05 14:35:58 $ */