1/*
2 * ccdigest_final_64be.c
3 * corecrypto
4 *
5 * Created on 12/06/2010
6 *
7 * Copyright (c) 2010,2011,2015 Apple Inc. All rights reserved.
8 *
9 *
10 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
11 *
12 * This file contains Original Code and/or Modifications of Original Code
13 * as defined in and that are subject to the Apple Public Source License
14 * Version 2.0 (the 'License'). You may not use this file except in
15 * compliance with the License. The rights granted to you under the License
16 * may not be used to create, or enable the creation or redistribution of,
17 * unlawful or unlicensed copies of an Apple operating system, or to
18 * circumvent, violate, or enable the circumvention or violation of, any
19 * terms of an Apple operating system software license agreement.
20 *
21 * Please obtain a copy of the License at
22 * http://www.opensource.apple.com/apsl/ and read it before using this file.
23 *
24 * The Original Code and all software distributed under the License are
25 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
26 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
27 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
28 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
29 * Please see the License for the specific language governing rights and
30 * limitations under the License.
31 *
32 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
33 */
34
35#include <corecrypto/ccdigest_priv.h>
36#include <corecrypto/cc_priv.h>
37#include "ccdigest_internal.h"
38
39/* This can be used for SHA1, SHA256 and SHA224 */
40void ccdigest_final_64be(const struct ccdigest_info *di, ccdigest_ctx_t ctx,
41 unsigned char *digest) {
42 ccdigest_nbits(di, ctx) += ccdigest_num(di, ctx) * 8;
43 ccdigest_data(di, ctx)[ccdigest_num(di, ctx)++] = 0x80;
44
45 /* If we don't have at least 8 bytes (for the length) left we need to add
46 a second block. */
47 if (ccdigest_num(di, ctx) > 64 - 8) {
48 while (ccdigest_num(di, ctx) < 64) {
49 ccdigest_data(di, ctx)[ccdigest_num(di, ctx)++] = 0;
50 }
51 di->compress(ccdigest_state(di, ctx), 1, ccdigest_data(di, ctx));
52 ccdigest_num(di, ctx) = 0;
53 }
54
55 /* pad upto block_size minus 8 with 0s */
56 while (ccdigest_num(di, ctx) < 64 - 8) {
57 ccdigest_data(di, ctx)[ccdigest_num(di, ctx)++] = 0;
58 }
59
60 CC_STORE64_BE(ccdigest_nbits(di, ctx), ccdigest_data(di, ctx) + 64 - 8);
61 di->compress(ccdigest_state(di, ctx), 1, ccdigest_data(di, ctx));
62
63 /* copy output */
64 for (unsigned int i = 0; i < di->output_size / 4; i++) {
65 CC_STORE32_BE(ccdigest_state_u32(di, ctx)[i], digest+(4*i));
66 }
67}
68