/* |
File: QCCPBKDF2SHA1KeyDerivation.h |
Abstract: Uses PBKDF2 to derive a key from a password string. |
Version: 1.0 |
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*/ |
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#import <Foundation/Foundation.h> |
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@interface QCCPBKDF2SHA1KeyDerivation : NSOperation |
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- (id)initWithPasswordString:(NSString *)passwordString saltData:(NSData *)saltData; |
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// properties set by the init method |
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@property (atomic, copy, readonly ) NSString * passwordString; |
@property (atomic, copy, readonly ) NSData * saltData; |
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// properties that may be set before running |
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@property (atomic, assign, readwrite) NSUInteger rounds; // default is 0, which calculates rounds based on derivationTime |
@property (atomic, assign, readwrite) NSTimeInterval derivationTime; // default is 0.1 seconds |
@property (atomic, assign, readwrite) NSUInteger derivedKeyLength; // default is 16 |
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// Note: With regards derivationTime, the underlying API takes a uint32_t |
// of milliseconds, meaning that values less than 1 ms or values greater |
// than 0xFFFFFFFF are silently truncated. |
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// properties set on finish |
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@property (atomic, copy, readonly ) NSError * error; |
@property (atomic, assign, readonly ) NSUInteger actualRounds; // the actual number of rounds used |
@property (atomic, copy, readonly ) NSData * derivedKeyData; // on success, will have same length as derivedKeyLength |
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@end |
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extern NSString * kQCCPBKDF2KeyDerivationErrorDomain; // codes are kCCParamError and its friends |
