projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| fe8ab488 A |
1 | /* |
| 2 | * ccdigest_final_64be.c | |
| 3 | * corecrypto | |
| 4 | * | |
| 3e170ce0 A |
5 | * Created on 12/06/2010 |
| 6 | * | |
| 7 | * Copyright (c) 2010,2011,2015 Apple Inc. All rights reserved. | |
| fe8ab488 | 8 | * |
| 5ba3f43e A |
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@ | |
| fe8ab488 A |
33 | */ |
| 34 | ||
| 35 | #include <corecrypto/ccdigest_priv.h> | |
| 36 | #include <corecrypto/cc_priv.h> | |
| d9a64523 | 37 | #include "ccdigest_internal.h" |
| fe8ab488 A |
38 | |
| 39 | /* This can be used for SHA1, SHA256 and SHA224 */ | |
| 0a7de745 | 40 | void |
| cb323159 | 41 | ccdigest_final_64be(const struct ccdigest_info *di, ccdigest_ctx_t ctx, unsigned char *digest) |
| 0a7de745 | 42 | { |
| cb323159 A |
43 | // Sanity check to recover from ctx corruptions. |
| 44 | if (ccdigest_num(di, ctx) >= di->block_size) { | |
| 45 | ccdigest_num(di, ctx) = 0; | |
| 46 | } | |
| 47 | ||
| 48 | // Clone the state. | |
| 49 | ccdigest_di_decl(di, tmp); | |
| 50 | cc_memcpy(tmp, ctx, ccdigest_di_size(di)); | |
| 51 | ||
| 52 | ccdigest_nbits(di, tmp) += ccdigest_num(di, tmp) * 8; | |
| 53 | ccdigest_data(di, tmp)[ccdigest_num(di, tmp)++] = 0x80; | |
| fe8ab488 | 54 | |
| 0a7de745 A |
55 | /* If we don't have at least 8 bytes (for the length) left we need to add |
| 56 | * a second block. */ | |
| cb323159 A |
57 | if (ccdigest_num(di, tmp) > 64 - 8) { |
| 58 | while (ccdigest_num(di, tmp) < 64) { | |
| 59 | ccdigest_data(di, tmp)[ccdigest_num(di, tmp)++] = 0; | |
| 0a7de745 | 60 | } |
| cb323159 A |
61 | di->compress(ccdigest_state(di, tmp), 1, ccdigest_data(di, tmp)); |
| 62 | ccdigest_num(di, tmp) = 0; | |
| 0a7de745 | 63 | } |
| fe8ab488 | 64 | |
| 0a7de745 | 65 | /* pad upto block_size minus 8 with 0s */ |
| cb323159 A |
66 | while (ccdigest_num(di, tmp) < 64 - 8) { |
| 67 | ccdigest_data(di, tmp)[ccdigest_num(di, tmp)++] = 0; | |
| 0a7de745 | 68 | } |
| fe8ab488 | 69 | |
| cb323159 A |
70 | CC_STORE64_BE(ccdigest_nbits(di, tmp), ccdigest_data(di, tmp) + 64 - 8); |
| 71 | di->compress(ccdigest_state(di, tmp), 1, ccdigest_data(di, tmp)); | |
| fe8ab488 | 72 | |
| 0a7de745 A |
73 | /* copy output */ |
| 74 | for (unsigned int i = 0; i < di->output_size / 4; i++) { | |
| cb323159 | 75 | CC_STORE32_BE(ccdigest_state_u32(di, tmp)[i], digest + (4 * i)); |
| 0a7de745 | 76 | } |
| cb323159 A |
77 | |
| 78 | ccdigest_di_clear(di, tmp); | |
| fe8ab488 | 79 | } |