Challenge Property

The challenge value.

Syntax

 ocra.getChallenge([callback])
 ocra.setChallenge( challenge_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 getChallenge([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 setChallenge([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 is populated after calling CreateChallenge. The format is specified by the ChallengeFormat property and the length is defined by the ChallengeLength property.

This property must be specified before calling CalculateResponse or VerifyResponse.

Data Type

Buffer