keychain/ot/OTBottledPeerRecord.m

   1 /*
   2  * Copyright (c) 2017 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #if OCTAGON
  25 #import "OTBottledPeerRecord.h"
  26 #import <corecrypto/cchkdf.h>
  27 #import <corecrypto/ccsha2.h>
  28 #import <corecrypto/ccec.h>
  29
  30 static NSString* OTCKRecordName = @"bp-";
  31
  32 @implementation OTBottledPeerRecord
  33
  34 -(NSString*) recordName
  35 {
  36     return [OTBottledPeerRecord constructRecordID:self.escrowRecordID escrowSigningSPKI:self.escrowedSigningSPKI];
  37 }
  38
  39 + (NSString*) constructRecordID:(NSString*)escrowRecordID escrowSigningSPKI:(NSData*)escrowSigningSPKI
  40 {
  41     const struct ccdigest_info *di = ccsha384_di();
  42     NSMutableData* result = [[NSMutableData alloc] initWithLength:ccsha384_di()->output_size];
  43
  44     ccdigest(di, [escrowSigningSPKI length], [escrowSigningSPKI bytes], [result mutableBytes]);
  45
  46     NSString* hash = [result base64EncodedStringWithOptions:0];
  47
  48     return [NSString stringWithFormat:@"%@-spid:%@-%@", OTCKRecordName, escrowRecordID, hash];
  49 }
  50
  51 @end
  52 #endif