50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
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/*
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Copyright 2016 Chris Ballinger
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Copyright 2016 OpenMarket Ltd
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Copyright 2016 Vector Creations Ltd
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 <Foundation/Foundation.h>
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FOUNDATION_EXPORT NSString *const OLMErrorDomain;
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@interface OLMUtility : NSObject
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/**
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Calculate the SHA-256 hash of the input and encodes it as base64.
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@param message the message to hash.
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@return the base64-encoded hash value.
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*/
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- (NSString*)sha256:(NSData*)message;
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/**
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Verify an ed25519 signature.
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@param signature the base64-encoded signature to be checked.
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@param key the ed25519 key.
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@param message the message which was signed.
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@param error if there is a problem with the verification.
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If the key was too small then the message will be "OLM.INVALID_BASE64".
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If the signature was invalid then the message will be "OLM.BAD_MESSAGE_MAC".
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@return YES if valid.
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*/
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- (BOOL)verifyEd25519Signature:(NSString*)signature key:(NSString*)key message:(NSData*)message error:(NSError**)error;
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+ (NSMutableData*) randomBytesOfLength:(NSUInteger)length;
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@end
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