iText.Commons.Bouncycastle.Crypto.Modes.IGCMBlockCipher Interface Reference

Interface for aes-gcm cryptographic ciphers. More...

Inheritance diagram for iText.Commons.Bouncycastle.Crypto.Modes.IGCMBlockCipher:

Public Member Functions
void	Init (bool forEncryption, byte[] key, int macSizeBits, byte[] iv)
	Initialize this cipher with a key and a set of algorithm parameters. More...
int	GetUpdateOutputSize (int len)
	Returns the length in bytes that an output buffer would need to be in order to hold the result of the next update operation, given the input length (in bytes). More...
void	ProcessBytes (byte[] input, int inputOffset, int len, byte[] output, int outOffset)
	Perform a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part. More...
byte[]	ProcessBytes (byte[] input, int inputOffset, int len)
	Perform a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part. More...
int	GetOutputSize (int len)
	Returns the length in bytes that an output buffer would need to be in order to hold the result of the next doFinal operation, given the input length (in bytes). More...
void	DoFinal (byte[] plainText, int i)
	Finishes a multiple-part encryption or decryption operation, depending on how this cipher was initialized. More...
byte[]	DoFinal ()
	Finishes a multiple-part encryption or decryption operation, depending on how this cipher was initialized. More...

Detailed Description

Interface for aes-gcm cryptographic ciphers.

Member Function Documentation

DoFinal() [1/2]

byte [] iText.Commons.Bouncycastle.Crypto.Modes.IGCMBlockCipher.DoFinal

(

)

Finishes a multiple-part encryption or decryption operation, depending on how this cipher was initialized.

Finishes a multiple-part encryption or decryption operation, depending on how this cipher was initialized. Input data that may have been buffered during a previous update operation is processed, also the authentication tag is appended in the case of encryption, or verified in the case of decryption.

Returns

byte array with the result

Implemented in iText.Bouncycastle.Crypto.Modes.GCMBlockCipherBC, and iText.Bouncycastlefips.Crypto.Modes.GCMBlockCipherBCFips.

DoFinal() [2/2]

void iText.Commons.Bouncycastle.Crypto.Modes.IGCMBlockCipher.DoFinal	(	byte[]	plainText,
		int	i
	)

Finishes a multiple-part encryption or decryption operation, depending on how this cipher was initialized.

Finishes a multiple-part encryption or decryption operation, depending on how this cipher was initialized. Input data that may have been buffered during a previous update operation is processed, also the authentication tag is appended in the case of encryption, or verified in the case of decryption.

Parameters

plainText	the buffer for the result
i	the offset in output where the result is stored

Implemented in iText.Bouncycastlefips.Crypto.Modes.GCMBlockCipherBCFips, and iText.Bouncycastle.Crypto.Modes.GCMBlockCipherBC.

GetOutputSize()

int iText.Commons.Bouncycastle.Crypto.Modes.IGCMBlockCipher.GetOutputSize

(

int

len

)

Returns the length in bytes that an output buffer would need to be in order to hold the result of the next doFinal operation, given the input length (in bytes).

Parameters

len	input length (in bytes)

Returns

output length in bytes

Implemented in iText.Bouncycastle.Crypto.Modes.GCMBlockCipherBC, and iText.Bouncycastlefips.Crypto.Modes.GCMBlockCipherBCFips.

GetUpdateOutputSize()

int iText.Commons.Bouncycastle.Crypto.Modes.IGCMBlockCipher.GetUpdateOutputSize

(

int

len

)

Returns the length in bytes that an output buffer would need to be in order to hold the result of the next update operation, given the input length (in bytes).

Parameters

len	input length (in bytes)

Returns

output length in bytes

Implemented in iText.Bouncycastlefips.Crypto.Modes.GCMBlockCipherBCFips, and iText.Bouncycastle.Crypto.Modes.GCMBlockCipherBC.

Init()

void iText.Commons.Bouncycastle.Crypto.Modes.IGCMBlockCipher.Init	(	bool	forEncryption,
		byte[]	key,
		int	macSizeBits,
		byte[]	iv
	)

Initialize this cipher with a key and a set of algorithm parameters.

Parameters

forEncryption	true to use encrypt mode, false to use decrypt mode
key	the encryption key
macSizeBits	MAC size, MAC sizes from 32 bits to 128 bits (must be a multiple of 8)
iv	the IV source buffer

Implemented in iText.Bouncycastle.Crypto.Modes.GCMBlockCipherBC, and iText.Bouncycastlefips.Crypto.Modes.GCMBlockCipherBCFips.

ProcessBytes() [1/2]

byte [] iText.Commons.Bouncycastle.Crypto.Modes.IGCMBlockCipher.ProcessBytes	(	byte[]	input,
		int	inputOffset,
		int	len
	)

Perform a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part.

Parameters

input	the input buffer
inputOffset	the offset in input where the input starts
len	the input length

Returns

byte array with the result

Implemented in iText.Bouncycastlefips.Crypto.Modes.GCMBlockCipherBCFips, and iText.Bouncycastle.Crypto.Modes.GCMBlockCipherBC.

ProcessBytes() [2/2]

void iText.Commons.Bouncycastle.Crypto.Modes.IGCMBlockCipher.ProcessBytes	(	byte[]	input,
		int	inputOffset,
		int	len,
		byte[]	output,
		int	outOffset
	)

Perform a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part.

Parameters

input	the input buffer
inputOffset	the offset in input where the input starts
len	the input length
output	the buffer for the result
outOffset	the offset in output where the result is stored

Implemented in iText.Bouncycastlefips.Crypto.Modes.GCMBlockCipherBCFips, and iText.Bouncycastle.Crypto.Modes.GCMBlockCipherBC.