AuthTag Property
The authentication tag used when UseAEAD is set to True.
Syntax
chacha.getAuthTag([callback]) chacha.setAuthTag( authTag_Buffer, [callback])
Default Value
""
Callback
The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).
The callback for the getAuthTag([callback]) method is defined as:
function(err, buffer){ }
'err' is the error that occurred. If there was no error, then 'err' is 'null'.
'buffer' is the value returned by the method.
The callback for the setAuthTag([callback]) method is defined as:
function(err){ }
'err' is the error that occurred. If there was no error, then 'err' is 'null'.
'err' has 2 properties which hold detailed information:
err.code err.message
Remarks
This property holds the 128 bit authentication tag used when UseAEAD is set to True. It is only applicable when UseAEAD is True.
This is populated after calling Encrypt. To also include the value in the output set IncludeAuthTag to True.
This must be set before calling Decrypt. If the auth tag is included in the encrypted data set IncludeAuthTag to True before calling Decrypt.
Data Type
Buffer