1*5e3eaea3SApple OSS Distributions /* Copyright (c) (2010,2011,2015-2019,2021) Apple Inc. All rights reserved.
2*5e3eaea3SApple OSS Distributions *
3*5e3eaea3SApple OSS Distributions * corecrypto is licensed under Apple Inc.’s Internal Use License Agreement (which
4*5e3eaea3SApple OSS Distributions * is contained in the License.txt file distributed with corecrypto) and only to
5*5e3eaea3SApple OSS Distributions * people who accept that license. IMPORTANT: Any license rights granted to you by
6*5e3eaea3SApple OSS Distributions * Apple Inc. (if any) are limited to internal use within your organization only on
7*5e3eaea3SApple OSS Distributions * devices and computers you own or control, for the sole purpose of verifying the
8*5e3eaea3SApple OSS Distributions * security characteristics and correct functioning of the Apple Software. You may
9*5e3eaea3SApple OSS Distributions * not, directly or indirectly, redistribute the Apple Software or any portions thereof.
10*5e3eaea3SApple OSS Distributions *
11*5e3eaea3SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
12*5e3eaea3SApple OSS Distributions *
13*5e3eaea3SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
14*5e3eaea3SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
15*5e3eaea3SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
16*5e3eaea3SApple OSS Distributions * compliance with the License. The rights granted to you under the License
17*5e3eaea3SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
18*5e3eaea3SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
19*5e3eaea3SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
20*5e3eaea3SApple OSS Distributions * terms of an Apple operating system software license agreement.
21*5e3eaea3SApple OSS Distributions *
22*5e3eaea3SApple OSS Distributions * Please obtain a copy of the License at
23*5e3eaea3SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
24*5e3eaea3SApple OSS Distributions *
25*5e3eaea3SApple OSS Distributions * The Original Code and all software distributed under the License are
26*5e3eaea3SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
27*5e3eaea3SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
28*5e3eaea3SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
29*5e3eaea3SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
30*5e3eaea3SApple OSS Distributions * Please see the License for the specific language governing rights and
31*5e3eaea3SApple OSS Distributions * limitations under the License.
32*5e3eaea3SApple OSS Distributions *
33*5e3eaea3SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
34*5e3eaea3SApple OSS Distributions */
35*5e3eaea3SApple OSS Distributions
36*5e3eaea3SApple OSS Distributions #include <corecrypto/ccdigest_priv.h>
37*5e3eaea3SApple OSS Distributions #include <corecrypto/cc_priv.h>
38*5e3eaea3SApple OSS Distributions #include "ccdigest_internal.h"
39*5e3eaea3SApple OSS Distributions
40*5e3eaea3SApple OSS Distributions /* This can be used for SHA1, SHA256 and SHA224 */
41*5e3eaea3SApple OSS Distributions void
ccdigest_final_64be(const struct ccdigest_info * di,ccdigest_ctx_t ctx,unsigned char * digest)42*5e3eaea3SApple OSS Distributions ccdigest_final_64be(const struct ccdigest_info *di, ccdigest_ctx_t ctx, unsigned char *digest)
43*5e3eaea3SApple OSS Distributions {
44*5e3eaea3SApple OSS Distributions // Sanity check to recover from ctx corruptions.
45*5e3eaea3SApple OSS Distributions if (ccdigest_num(di, ctx) >= di->block_size) {
46*5e3eaea3SApple OSS Distributions ccdigest_num(di, ctx) = 0;
47*5e3eaea3SApple OSS Distributions }
48*5e3eaea3SApple OSS Distributions
49*5e3eaea3SApple OSS Distributions // Clone the state.
50*5e3eaea3SApple OSS Distributions ccdigest_di_decl(di, tmp);
51*5e3eaea3SApple OSS Distributions cc_memcpy(tmp, ctx, ccdigest_di_size(di));
52*5e3eaea3SApple OSS Distributions
53*5e3eaea3SApple OSS Distributions ccdigest_nbits(di, tmp) += ccdigest_num(di, tmp) * 8;
54*5e3eaea3SApple OSS Distributions ccdigest_data(di, tmp)[ccdigest_num(di, tmp)++] = 0x80;
55*5e3eaea3SApple OSS Distributions
56*5e3eaea3SApple OSS Distributions /* If we don't have at least 8 bytes (for the length) left we need to add
57*5e3eaea3SApple OSS Distributions * a second block. */
58*5e3eaea3SApple OSS Distributions if (ccdigest_num(di, tmp) > 64 - 8) {
59*5e3eaea3SApple OSS Distributions while (ccdigest_num(di, tmp) < 64) {
60*5e3eaea3SApple OSS Distributions ccdigest_data(di, tmp)[ccdigest_num(di, tmp)++] = 0;
61*5e3eaea3SApple OSS Distributions }
62*5e3eaea3SApple OSS Distributions di->compress(ccdigest_state(di, tmp), 1, ccdigest_data(di, tmp));
63*5e3eaea3SApple OSS Distributions ccdigest_num(di, tmp) = 0;
64*5e3eaea3SApple OSS Distributions }
65*5e3eaea3SApple OSS Distributions
66*5e3eaea3SApple OSS Distributions /* pad upto block_size minus 8 with 0s */
67*5e3eaea3SApple OSS Distributions while (ccdigest_num(di, tmp) < 64 - 8) {
68*5e3eaea3SApple OSS Distributions ccdigest_data(di, tmp)[ccdigest_num(di, tmp)++] = 0;
69*5e3eaea3SApple OSS Distributions }
70*5e3eaea3SApple OSS Distributions
71*5e3eaea3SApple OSS Distributions cc_store64_be(ccdigest_nbits(di, tmp), ccdigest_data(di, tmp) + 64 - 8);
72*5e3eaea3SApple OSS Distributions di->compress(ccdigest_state(di, tmp), 1, ccdigest_data(di, tmp));
73*5e3eaea3SApple OSS Distributions
74*5e3eaea3SApple OSS Distributions /* copy output */
75*5e3eaea3SApple OSS Distributions for (unsigned int i = 0; i < di->output_size / 4; i++) {
76*5e3eaea3SApple OSS Distributions cc_store32_be(ccdigest_state_u32(di, tmp)[i], digest + (4 * i));
77*5e3eaea3SApple OSS Distributions }
78*5e3eaea3SApple OSS Distributions
79*5e3eaea3SApple OSS Distributions ccdigest_di_clear(di, tmp);
80*5e3eaea3SApple OSS Distributions }
81