62 lines
1.9 KiB
Objective-C
62 lines
1.9 KiB
Objective-C
//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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NS_ASSUME_NONNULL_BEGIN
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@interface OWSBackupEncryptedItem : NSObject
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@property (nonatomic) NSString *filePath;
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@property (nonatomic) NSData *encryptionKey;
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@end
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#pragma mark -
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@interface OWSBackupIO : NSObject
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- (instancetype)init NS_UNAVAILABLE;
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- (instancetype)initWithJobTempDirPath:(NSString *)jobTempDirPath;
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- (NSString *)generateTempFilePath;
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- (nullable NSString *)createTempFile;
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#pragma mark - Encrypt
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- (nullable OWSBackupEncryptedItem *)encryptFileAsTempFile:(NSString *)srcFilePath;
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- (nullable OWSBackupEncryptedItem *)encryptFileAsTempFile:(NSString *)srcFilePath
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encryptionKey:(NSData *)encryptionKey;
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- (nullable OWSBackupEncryptedItem *)encryptDataAsTempFile:(NSData *)srcData;
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- (nullable OWSBackupEncryptedItem *)encryptDataAsTempFile:(NSData *)srcData encryptionKey:(NSData *)encryptionKey;
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#pragma mark - Decrypt
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- (BOOL)decryptFileAsFile:(NSString *)srcFilePath
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dstFilePath:(NSString *)dstFilePath
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encryptionKey:(NSData *)encryptionKey;
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- (nullable NSData *)decryptFileAsData:(NSString *)srcFilePath encryptionKey:(NSData *)encryptionKey;
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- (nullable NSData *)decryptDataAsData:(NSData *)srcData encryptionKey:(NSData *)encryptionKey;
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#pragma mark - Compression
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- (nullable NSData *)compressData:(NSData *)srcData;
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// I'm using the (new in iOS 9) compressionlib. One of its weaknesses is that it
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// requires you to pre-allocate output buffers during compression and decompression.
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// During decompression this is particularly tricky since there's no way to safely
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// predict how large the output will be based on the input. So, we store the
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// uncompressed size for compressed backup items.
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- (nullable NSData *)decompressData:(NSData *)srcData uncompressedDataLength:(NSUInteger)uncompressedDataLength;
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@end
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NS_ASSUME_NONNULL_END
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