64 lines
2.2 KiB
Objective-C
64 lines
2.2 KiB
Objective-C
/*
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* JBoss, Home of Professional Open Source.
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* Copyright Red Hat, Inc., and individual contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import "AGSigningKey.h"
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#import "AGUtil.h"
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@implementation AGSigningKey {
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NSMutableData *_secretKey;
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NSMutableData *_publicKey;
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}
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- (id)init {
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self = [super init];
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if (self) {
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NSMutableData *seed = [NSMutableData dataWithLength:crypto_sign_ed25519_SECRETKEYBYTES];
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randombytes([seed mutableBytes], [seed length]);
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_publicKey = [NSMutableData dataWithLength:crypto_sign_ed25519_PUBLICKEYBYTES];
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_secretKey = [NSMutableData dataWithLength:crypto_sign_ed25519_SECRETKEYBYTES];
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// Generate the keypair
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int status = crypto_sign_ed25519_seed_keypair([_publicKey mutableBytes],
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[_secretKey mutableBytes],
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[seed mutableBytes]);
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// should not happen
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NSAssert(status == 0, @"Failed to generate a key pair", status);
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}
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return self;
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}
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- (NSData *)sign:(NSData *)message {
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NSParameterAssert(message != nil);
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NSMutableData *signature = [AGUtil prependZeros:crypto_sign_ed25519_BYTES msg:message];
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unsigned long long bufferLen;
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// sign the message
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int status = crypto_sign_ed25519([signature mutableBytes], &bufferLen,
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[message bytes],
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[message length],
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[_secretKey bytes]);
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NSAssert(status == 0, @"unable to sign message", status);
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return [signature subdataWithRange:NSMakeRange(0, crypto_sign_ed25519_BYTES)];
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}
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@end |