1/*
2 * Copyright (c) 2003 Apple Computer, Inc. All Rights Reserved.
3 *
4 * The contents of this file constitute Original Code as defined in and are
5 * subject to the Apple Public Source License Version 1.2 (the 'License').
6 * You may not use this file except in compliance with the License. Please
7 * obtain a copy of the License at http://www.apple.com/publicsource and
8 * read it before using this file.
9 *
10 * This Original Code and all software distributed under the License are
11 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
12 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
13 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
15 * Please see the License for the specific language governing rights and
16 * limitations under the License.
17 */
18/*
19 * pbkdDigest.cpp - SHA1/MD5 digest object for HMAC and PBE routines
20 */
21
22#include "pbkdDigest.h"
23#include <Security/cssmerr.h>
24#include <string.h>
25
26/* the casts are necessary to cover the polymorphous context types */
27DigestOps Md2Ops = {
28	(DigestInitFcn)CC_MD2_Init,
29	(DigestUpdateFcn)CC_MD2_Update,
30	(DigestFinalFcn)CC_MD2_Final
31};
32DigestOps Md5Ops = {
33	(DigestInitFcn)CC_MD5_Init,
34	(DigestUpdateFcn)CC_MD5_Update,
35	(DigestFinalFcn)CC_MD5_Final
36};
37DigestOps Sha1Ops = {
38	(DigestInitFcn)CC_SHA1_Init,
39	(DigestUpdateFcn)CC_SHA1_Update,
40	(DigestFinalFcn)CC_SHA1_Final
41};
42
43/* Ops on a DigestCtx - all return zero on error, like the underlying digests do */
44int DigestCtxInit(
45	DigestCtx 	*ctx,
46	CSSM_ALGORITHMS hashAlg)
47{
48	switch(hashAlg) {
49		case CSSM_ALGID_SHA1:
50			ctx->ops = &Sha1Ops;
51			break;
52		case CSSM_ALGID_MD5:
53			ctx->ops = &Md5Ops;
54			break;
55		case CSSM_ALGID_MD2:
56			ctx->ops = &Md2Ops;
57			break;
58		default:
59			return 0;
60	}
61	ctx->hashAlg = hashAlg;
62	return ctx->ops->init(&ctx->dig);
63}
64
65void DigestCtxFree(
66	DigestCtx 	*ctx)
67{
68	memset(ctx, 0, sizeof(DigestCtx));
69}
70
71int DigestCtxUpdate(
72	DigestCtx 	*ctx,
73	const void *textPtr,
74	uint32 textLen)
75{
76	return ctx->ops->update(&ctx->dig, textPtr, textLen);
77}
78
79int DigestCtxFinal(
80	DigestCtx 	*ctx,
81	void 		*digest)
82{
83	return ctx->ops->final(digest, &ctx->dig);
84}
85