1 // SPDX-License-Identifier: BSD-2-Clause
2 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
3 *
4 * LibTomCrypt is a library that provides various cryptographic
5 * algorithms in a highly modular and flexible manner.
6 *
7 * The library is free for all purposes without any express
8 * guarantee it works.
9 */
10 #include "tomcrypt_private.h"
11
12 #ifdef LTC_HASH_HELPERS
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 */
hash_memory(int hash,const unsigned char * in,unsigned long inlen,unsigned char * out,unsigned long * outlen)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 #endif /* #ifdef LTC_HASH_HELPERS */
67
68 /* ref: $Format:%D$ */
69 /* git commit: $Format:%H$ */
70 /* commit time: $Format:%ai$ */
71