/* |
File: QCCAESPadBigCryptor.h |
Abstract: Implements AES encryption and decryption with PKCS#7 padding in a way that's suitable for large data sets. |
Version: 1.0 |
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*/ |
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#import <Foundation/Foundation.h> |
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// Notes: |
// |
// o The streams are opened if they're in state NSStreamStatusNotOpen when the operation is run. |
// |
// o If the operation opens the streams, it closes them at the end. |
// |
// o The operation reads and writes the streams synchronously, making it only suitable for use |
// with file streams. An operation that supported network streams would be significantly |
// more complex. |
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@interface QCCAESPadBigCryptor : NSOperation |
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- (id)initToEncryptInputStream:(NSInputStream *)inputStream toOutputStream:(NSOutputStream *)outputStream keyData:(NSData *)keyData; |
- (id)initToDecryptInputStream:(NSInputStream *)inputStream toOutputStream:(NSOutputStream *)outputStream keyData:(NSData *)keyData; |
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// properties set by the init method |
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@property (atomic, strong, readonly ) NSInputStream * inputStream; // on encrypt, can be any length; on decrypt, length must be an even multiple of kCCBlockSizeAES128 |
@property (atomic, strong, readonly ) NSOutputStream * outputStream; // on encrypt, will be an even multiple of kCCBlockSizeAES128; on decrypt, can be any length |
@property (atomic, copy, readonly ) NSData * keyData; // must be either kCCKeySizeAES128, kCCKeySizeAES192 or kCCKeySizeAES256 |
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// properties that may be set before running |
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@property (atomic, copy, readwrite) NSData * ivData; // length must be kCCBlockSizeAES128 bytes, defaults to all zeros, |
// set to nil for ECB mode (generally a bad idea) |
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// properties set on finish |
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@property (atomic, copy, readonly ) NSError * error; |
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@end |
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extern NSString * kQCCAESPadBigCryptorErrorDomain; // codes are kCCParamError and its friends |
