EncryptFile Method
Encrypts a file.
Syntax
symmetriccrypto.encryptFile(sourceFile, destFile, [callback])
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 this 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
Use this method to encrypt a file and save the protected message in another file.
Specify the encryption key in Key property before commencing encryption.