New data key

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4D v20 R7

New data key


New data key ( passPhrase ) -> Function result

Parameter	Type	Description
passPhrase	Text	Passphrase to use to generate the AES data encryption key
Function result	Object	Object containing the key (encodedKey property)

Description

The New data key command generates a binary data encryption key from the text passed in the passPhrase parameter.

The encoded key can be saved locally, in order to be stored on an removable device, like an USB key (see Storing data encryption keys in files in the 4D Design Reference). Connecting this device to the machine that hosts the encrypted database will automatically allow the user to access the encrypted data.

You can pass any character in passPhrase. The same passPhrase will always produce the same data encryption key.

Returned value

The returned object contains the following property:

Property	Type	Description
encodedKey	Text	AES encryption key (SHA 256-bit) generated from the passPhrase

If an empty string was passed in passPhrase, the command returns null.

Example

You want to save an encryption key in a .4DKeyChain file:

 C_OBJECT($dataKey)

 C_TEXT($passphrase)

 

 $passphrase:=Request("Enter the passphrase:")

 If(OK=1)

    $dataKey:=New data key($passphrase)

    TEXT TO DOCUMENT("generatedKey.4DKeyChain";JSON Stringify($dataKey))

 End if