| | 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 |
| | 41 | ccdigest_final_64be(const struct ccdigest_info *di, ccdigest_ctx_t ctx, unsigned char *digest) |
| | 42 | { |
| | 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; |
| | 54 | |
| | 55 | /* If we don't have at least 8 bytes (for the length) left we need to add |
| | 56 | * a second block. */ |
| | 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; |
| | 60 | } |
| | 61 | di->compress(ccdigest_state(di, tmp), 1, ccdigest_data(di, tmp)); |
| | 62 | ccdigest_num(di, tmp) = 0; |
| | 63 | } |
| | 64 | |
| | 65 | /* pad upto block_size minus 8 with 0s */ |
| | 66 | while (ccdigest_num(di, tmp) < 64 - 8) { |
| | 67 | ccdigest_data(di, tmp)[ccdigest_num(di, tmp)++] = 0; |
| | 68 | } |
| | 69 | |
| | 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)); |
| | 72 | |
| | 73 | /* copy output */ |
| | 74 | for (unsigned int i = 0; i < di->output_size / 4; i++) { |
| | 75 | CC_STORE32_BE(ccdigest_state_u32(di, tmp)[i], digest + (4 * i)); |
| | 76 | } |
| | 77 | |
| | 78 | ccdigest_di_clear(di, tmp); |
| | 79 | } |
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