Mercurial > dropbear

comparison libtomcrypt/src/mac/omac/omac_memory.c @ 389:5ff8218bcee9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
propagate from branch 'au.asn.ucc.matt.ltm.dropbear' (head 2af95f00ebd5bb7a28b3817db1218442c935388e) to branch 'au.asn.ucc.matt.dropbear' (head ecd779509ef23a8cdf64888904fc9b31d78aa933)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 11 Jan 2007 03:14:55 +0000
parents 0cbe8f6dbf9e
children f849a5ca2efc
comparison
equal deleted inserted replaced
388:fb54020f78e1 389:5ff8218bcee9
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 omac_memory.c
15 OMAC1 support, process a block of memory, Tom St Denis
16 */
17
18 #ifdef LTC_OMAC
19
20 /**
21 OMAC a block of memory
22 @param cipher The index of the desired cipher
23 @param key The secret key
24 @param keylen The length of the secret key (octets)
25 @param in The data to send through OMAC
26 @param inlen The length of the data to send through OMAC (octets)
27 @param out [out] The destination of the authentication tag
28 @param outlen [in/out] The max size and resulting size of the authentication tag (octets)
29 @return CRYPT_OK if successful
30 */
31 int omac_memory(int cipher,
32 const unsigned char *key, unsigned long keylen,
33 const unsigned char *in, unsigned long inlen,
34 unsigned char *out, unsigned long *outlen)
35 {
36 int err;
37 omac_state *omac;
38
39 LTC_ARGCHK(key != NULL);
40 LTC_ARGCHK(in != NULL);
41 LTC_ARGCHK(out != NULL);
42 LTC_ARGCHK(outlen != NULL);
43
44 /* is the cipher valid? */
45 if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
46 return err;
47 }
48
49 /* Use accelerator if found */
50 if (cipher_descriptor[cipher].omac_memory != NULL) {
51 return cipher_descriptor[cipher].omac_memory(key, keylen, in, inlen, out, outlen);
52 }
53
54 /* allocate ram for omac state */
55 omac = XMALLOC(sizeof(omac_state));
56 if (omac == NULL) {
57 return CRYPT_MEM;
58 }
59
60 /* omac process the message */
61 if ((err = omac_init(omac, cipher, key, keylen)) != CRYPT_OK) {
62 goto LBL_ERR;
63 }
64 if ((err = omac_process(omac, in, inlen)) != CRYPT_OK) {
65 goto LBL_ERR;
66 }
67 if ((err = omac_done(omac, out, outlen)) != CRYPT_OK) {
68 goto LBL_ERR;
69 }
70
71 err = CRYPT_OK;
72 LBL_ERR:
73 #ifdef LTC_CLEAN_STACK
74 zeromem(omac, sizeof(omac_state));
75 #endif
76
77 XFREE(omac);
78 return err;
79 }
80
81 #endif
82
83 /* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_memory.c,v $ */
84 /* $Revision: 1.6 $ */
85 /* $Date: 2006/11/08 23:01:06 $ */