SecureBlackbox 2020 Node.js Edition

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UpdateFile Method

Feeds the contents of a file to the hash function.

Syntax

hashfunction.updateFile(sourceFile, [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

Call this method to pass the contents of a file to the hash function. You can call this function repeatedly and mix it with Update to feed the hash function with many separate chunks of data.

Remember to initialize the hash function with an Reset call before starting hashing the data. Once all the data chunks have been submitted, finalize the hash function and obtain the resulting message digest by calling Finish.

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SecureBlackbox 2020 Node.js Edition - Version 20.0 [Build 8165]