projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| fe8ab488 A |
1 | /* |
| 2 | * cchmac_final.c | |
| 3 | * corecrypto | |
| 4 | * | |
| 3e170ce0 A |
5 | * Created on 12/07/2010 |
| 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 | ||
| cb323159 | 35 | #include <corecrypto/ccdigest_priv.h> |
| fe8ab488 A |
36 | #include <corecrypto/cchmac.h> |
| 37 | #include <corecrypto/ccn.h> | |
| 3e170ce0 | 38 | #include <corecrypto/cc_priv.h> |
| fe8ab488 | 39 | |
| 0a7de745 A |
40 | void |
| 41 | cchmac_final(const struct ccdigest_info *di, cchmac_ctx_t hc, | |
| 42 | unsigned char *mac) | |
| 43 | { | |
| 44 | // Finalize the inner state of the data being HMAC'd, i.e., H((key \oplus ipad) || m) | |
| 45 | ccdigest_final(di, cchmac_digest_ctx(di, hc), cchmac_data(di, hc)); | |
| d9a64523 | 46 | |
| 0a7de745 A |
47 | // Set the HMAC output size based on the digest algorithm |
| 48 | cchmac_num(di, hc) = (unsigned int)di->output_size; /* typecast: output size will alwys fit in an unsigned int */ | |
| 49 | cchmac_nbits(di, hc) = di->block_size * 8; | |
| d9a64523 | 50 | |
| 0a7de745 A |
51 | // Copy the pre-computed compress(key \oplus opad) back to digest state, |
| 52 | // and then run through the digest once more to finish the HMAC | |
| 53 | ccdigest_copy_state(di, cchmac_istate32(di, hc), cchmac_ostate32(di, hc)); | |
| 54 | ccdigest_final(di, cchmac_digest_ctx(di, hc), mac); | |
| fe8ab488 | 55 | } |