OTPrivateKey+SF.m   [plain text]

/*
* Copyright (c) 2017 Apple Inc. All Rights Reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
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* @APPLE_LICENSE_HEADER_END@
*/

#import "OTPrivateKey+SF.h"
#import <SecurityFoundation/SFKey_Private.h>
#import "keychain/ot/OTDefines.h"
#import "keychain/ot/OTConstants.h"
#import "utilities/SecCFWrappers.h"

@implementation OTPrivateKey (SecurityFoundation)

+ (instancetype)fromECKeyPair:(SFECKeyPair *)keyPair
{
OTPrivateKey *pk = [OTPrivateKey new];
pk.keyType = OTPrivateKey_KeyType_EC_NIST_CURVES;
pk.keyData = keyPair.keyData;
return pk;
}

+ (SecKeyRef) createSecKey:(NSData*)keyData CF_RETURNS_RETAINED
{
NSDictionary *keyAttributes = @{
(__bridge id)kSecAttrKeyClass : (__bridge id)kSecAttrKeyClassPrivate,
(__bridge id)kSecAttrKeyType : (__bridge id)kSecAttrKeyTypeEC,
};

SecKeyRef key = SecKeyCreateWithData((__bridge CFDataRef)keyData, (__bridge CFDictionaryRef)keyAttributes, NULL);
return key;
}

- (SFECKeyPair * _Nullable)asECKeyPair:(NSError**)error
{
if (self.keyType != OTPrivateKey_KeyType_EC_NIST_CURVES) {
if(error){
*error = [NSError errorWithDomain:OctagonErrorDomain code:OTErrorNotSupported userInfo:nil];
}
return nil;
}
SecKeyRef secKey = [OTPrivateKey createSecKey:self.keyData];
SFECKeyPair *result = [[SFECKeyPair alloc] initWithSecKey:secKey];
CFReleaseNull(secKey);
return result;
}

@end