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
  30 @implementation OTPrivateKey (SecurityFoundation)
  31
  32 + (instancetype)fromECKeyPair:(SFECKeyPair *)keyPair
  33 {
  34     OTPrivateKey *pk = [OTPrivateKey new];
  35     pk.keyType = OTPrivateKey_KeyType_EC_NIST_CURVES;
  36     pk.keyData = keyPair.keyData;
  37     return pk;
  38 }
  39 + (SecKeyRef) createSecKey:(NSData*)keyData
  40 {
  41     NSDictionary *keyAttributes = @{
  42                                     (__bridge id)kSecAttrKeyClass : (__bridge id)kSecAttrKeyClassPrivate,
  43                                     (__bridge id)kSecAttrKeyType : (__bridge id)kSecAttrKeyTypeEC,
  44                                     };
  45
  46     SecKeyRef key = SecKeyCreateWithData((__bridge CFDataRef)keyData, (__bridge CFDictionaryRef)keyAttributes, NULL);
  47     return key;
  48 }
  49
  50 - (SFECKeyPair * _Nullable)asECKeyPair:(NSError**)error
  51 {
  52     if (self.keyType != OTPrivateKey_KeyType_EC_NIST_CURVES) {
  53         if(error){
  54             *error = [NSError errorWithDomain:OctagonErrorDomain code:OTErrorNotSupported userInfo:nil];
  55         }
  56         return nil;
  57     }
  58     return [[SFECKeyPair alloc] initWithSecKey:[OTPrivateKey createSecKey:self.keyData]];
  59 }
  60
  61 @end
  62