keychain/TrustedPeersHelper/categories/OTPrivateKey+SF.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
  25 #import "OTPrivateKey+SF.h"
  26 #import <SecurityFoundation/SFKey_Private.h>
  27 #import "keychain/ot/OTDefines.h"
  28 #import "keychain/ot/OTConstants.h"
  29 #import "utilities/SecCFWrappers.h"
  30
  31 @implementation OTPrivateKey (SecurityFoundation)
  32
  33 + (instancetype)fromECKeyPair:(SFECKeyPair *)keyPair
  34 {
  35     OTPrivateKey *pk = [OTPrivateKey new];
  36     pk.keyType = OTPrivateKey_KeyType_EC_NIST_CURVES;
  37     pk.keyData = keyPair.keyData;
  38     return pk;
  39 }
  40
  41 + (SecKeyRef) createSecKey:(NSData*)keyData CF_RETURNS_RETAINED
  42 {
  43     NSDictionary *keyAttributes = @{
  44                                     (__bridge id)kSecAttrKeyClass : (__bridge id)kSecAttrKeyClassPrivate,
  45                                     (__bridge id)kSecAttrKeyType : (__bridge id)kSecAttrKeyTypeEC,
  46                                     };
  47
  48     SecKeyRef key = SecKeyCreateWithData((__bridge CFDataRef)keyData, (__bridge CFDictionaryRef)keyAttributes, NULL);
  49     return key;
  50 }
  51
  52 - (SFECKeyPair * _Nullable)asECKeyPair:(NSError**)error
  53 {
  54     if (self.keyType != OTPrivateKey_KeyType_EC_NIST_CURVES) {
  55         if(error){
  56             *error = [NSError errorWithDomain:OctagonErrorDomain code:OTErrorNotSupported userInfo:nil];
  57         }
  58         return nil;
  59     }
  60     SecKeyRef secKey = [OTPrivateKey createSecKey:self.keyData];
  61     SFECKeyPair *result = [[SFECKeyPair alloc] initWithSecKey:secKey];
  62     CFReleaseNull(secKey);
  63     return result;
  64 }
  65
  66 @end
  67