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 */ |
40 | void 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 | |