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class Decipher

package js.node.crypto

extends Transform › Duplex › Readable › Stream › EventEmitter

Class for decrypting data.

Returned by Crypto.createDecipher and Crypto.createDecipheriv.

Decipher objects are streams that are both readable and writable. The written enciphered data is used to produce the plain-text data on the the readable side.

The legacy update and final methods are also supported.

Methods

@:native("final")finalContents(output_encoding:String):String

@:native("final")final():Buffer

Returns any remaining plaintext which is deciphered, with output_encoding being one of: 'binary', 'ascii' or 'utf8'. If no encoding is provided, then a buffer is returned.

Note: decipher object can not be used after final method has been called.

setAAD(buffer:Buffer):Void

For authenticated encryption modes (currently supported: GCM), this method sets the value used for the additional authenticated data (AAD) input parameter.

setAuthTag(buffer:Buffer):Void

For authenticated encryption modes (currently supported: GCM), this method must be used to pass in the received authentication tag. If no tag is provided or if the ciphertext has been tampered with, final will throw, thus indicating that the ciphertext should be discarded due to failed authentication.

setAutoPadding(auto_padding:Bool):Void

setAutoPadding():Void

You can disable auto padding if the data has been encrypted without standard block padding to prevent final from checking and removing it.

Can only work if the input data's length is a multiple of the ciphers block size.

You must call this before streaming data to update.

update(data:String, input_encoding:String, output_encoding:String):String

update(data:Buffer):Buffer

update(data:String, input_encoding:String):Buffer

Updates the decipher with data, which is encoded in 'binary', 'base64' or 'hex'. If no encoding is provided, then a buffer is expected.

The output_decoding specifies in what format to return the deciphered plaintext: 'binary', 'ascii' or 'utf8'. If no encoding is provided, then a buffer is returned.

Inherited Variables

Defined by Duplex

read onlywritable:Bool

Is true if it is safe to call writable.write().

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read onlywritableEnded:Bool

Is true after writable.end() has been called. This property does not indicate whether the data has been flushed, for this use writable.writableFinished instead.

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read onlywritableFinished:Bool

Is set to true immediately before the 'finish' event is emitted.

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read onlywritableLength:Int

This property contains the number of bytes (or objects) in the queue ready to be written. The value provides introspection data regarding the status of the highWaterMark.

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read onlywritableObjectMode:Bool

Getter for the property objectMode of a given Writable stream.

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read onlywritablehighWaterMark:Int

Return the value of highWaterMark passed when constructing this Writable.

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Defined by Readable

read onlydestroyed:Bool

Is true after readable.destroy() has been called.

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read onlyisTTY:Bool

Terminal read streams (i.e. process.stdin) have this property set to true. It is false for any other read streams.

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read onlyreadable:Bool

Is true if it is safe to call readable.read().

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read onlyreadableEncoding:Null<String>

Getter for the property encoding of a given Readable stream. The encoding property can be set using the readable.setEncoding() method.

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read onlyreadableEnded:Bool

Becomes true when 'end' event is emitted.

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read onlyreadableHighWaterMark:Int

Returns the value of highWaterMark passed when constructing this Readable.

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read onlyreadableLength:Int

This property contains the number of bytes (or objects) in the queue ready to be read. The value provides introspection data regarding the status of the highWaterMark.

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read onlyreadableObjectMode:Bool

Getter for the property objectMode of a given Readable stream.

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Inherited Methods

Defined by Transform

Defined by Duplex

cork():Void

The writable.cork() method forces all written data to be buffered in memory. The buffered data will be flushed when either the stream.uncork() or stream.end() methods are called.

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destroy(?error:Error):TSelf

Destroy the stream. Optionally emit an 'error' event, and emit a 'close' event unless emitClose is set in false.

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end(chunk:Dynamic, ?encoding:String, ?callback:EitherType<() ‑> Void, Null<Error> ‑> Void>):Void

end(?callback:EitherType<() ‑> Void, Null<Error> ‑> Void>):Void

Calling the writable.end() method signals that no more data will be written to the Writable. The optional chunk and encoding arguments allow one final additional chunk of data to be written immediately before closing the stream. If provided, the optional callback function is attached as a listener for the 'finish' event.

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setDefaultEncoding(encoding:String):TSelf

The writable.setDefaultEncoding() method sets the default encoding for a Writable stream.

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uncork():Void

The writable.uncork() method flushes all data buffered since stream.cork() was called.

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write(chunk:Dynamic, ?encoding:String, ?callback:EitherType<() ‑> Void, Null<Error> ‑> Void>):Bool

The writable.write() method writes some data to the stream, and calls the supplied callback once the data has been fully handled. If an error occurs, the callback may or may not be called with the error as its first argument. To reliably detect write errors, add a listener for the 'error' event.

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Defined by Readable

isPaused():Bool

The readable.isPaused() method returns the current operating state of the Readable. This is used primarily by the mechanism that underlies the readable.pipe() method. In most typical cases, there will be no reason to use this method directly.

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pause():TSelf

The readable.pause() method will cause a stream in flowing mode to stop emitting 'data' events, switching out of flowing mode. Any data that becomes available will remain in the internal buffer.

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pipe<T>(destination:T, ?options:{end:Null<Bool>}):T

The readable.pipe() method attaches a Writable stream to the readable, causing it to switch automatically into flowing mode and push all of its data to the attached Writable. The flow of data will be automatically managed so that the destination Writable stream is not overwhelmed by a faster Readable stream.

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read(?size:Int):Null<Dynamic>

The readable.read() method pulls some data out of the internal buffer and returns it. If no data available to be read, null is returned. By default, the data will be returned as a Buffer object unless an encoding has been specified using the readable.setEncoding() method or the stream is operating in object mode.

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resume():TSelf

The readable.resume() method causes an explicitly paused Readable stream to resume emitting 'data' events, switching the stream into flowing mode.

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setEncoding(encoding:String):TSelf

The readable.setEncoding() method sets the character encoding for data read from the Readable stream.

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unpipe(?destination:IWritable):TSelf

The readable.unpipe() method detaches a Writable stream previously attached using the stream.pipe() method.

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unshift(chunk:Null<Dynamic>, ?encoding:String):Void

Passing chunk as null signals the end of the stream (EOF), after which no more data can be written.

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wrap(stream:Dynamic):IReadable

Prior to Node.js 0.10, streams did not implement the entire stream module API as it is currently defined. (See Compatibility for more information.)

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Defined by EventEmitter

addListener<T>(eventName:Event<T>, listener:T):TSelf

Alias for emitter.on(eventName, listener).

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emit<T>(eventName:Event<T>, args:Rest<Dynamic>):Bool

Synchronously calls each of the listeners registered for the event named eventName, in the order they were registered, passing the supplied arguments to each.

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eventNames():Array<EitherType<String, Symbol>>

Returns an array listing the events for which the emitter has registered listeners. The values in the array will be strings or Symbols.

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getMaxListeners():Int

Returns the current max listener value for the EventEmitter which is either set by emitter.setMaxListeners(n) or defaults to EventEmitter.defaultMaxListeners.

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listenerCount<T>(eventName:Event<T>):Int

Returns the number of listeners listening to the event named eventName.

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listeners<T>(eventName:Event<T>):Array<T>

Returns a copy of the array of listeners for the event named eventName.

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off<T>(eventName:Event<T>, listener:T):TSelf

Alias for emitter.removeListener().

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on<T>(eventName:Event<T>, listener:T):TSelf

Adds the listener function to the end of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventName and listener will result in the listener being added, and called, multiple times.

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once<T>(eventName:Event<T>, listener:T):TSelf

Adds a one-time listener function for the event named eventName. The next time eventName is triggered, this listener is removed and then invoked.

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prependListener<T>(eventName:Event<T>, listener:T):TSelf

Adds the listener function to the beginning of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventName and listener will result in the listener being added, and called, multiple times.

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prependOnceListener<T>(eventName:Event<T>, listener:T):TSelf

Adds a one-time listener function for the event named eventName to the beginning of the listeners array. The next time eventName is triggered, this listener is removed, and then invoked.

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rawListeners<T>(eventName:Event<T>):Array<T>

Returns a copy of the array of listeners for the event named eventName, including any wrappers (such as those created by .once()).

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removeAllListeners<T>(?eventName:Event<T>):TSelf

Removes all listeners, or those of the specified eventName.

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removeListener<T>(eventName:Event<T>, listener:T):TSelf

Removes the specified listener from the listener array for the event named eventName.

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setMaxListeners(n:Int):Void

By default EventEmitters will print a warning if more than 10 listeners are added for a particular event. This is a useful default that helps finding memory leaks. Obviously, not all events should be limited to just 10 listeners. The emitter.setMaxListeners() method allows the limit to be modified for this specific EventEmitter instance. The value can be set to Infinity (or 0) to indicate an unlimited number of listeners.

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