DataFlex

PBKDF2 Key Derivation

Demonstrates AES secret key derivation from a password using PBDKF2. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoCrypt
    String sPassword
    String sCharset
    String sHashAlg
    String sSaltHex
    Integer iIterationCount
    Integer iOutputBitLen
    String sEnc
    String sHexKey

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    Get Create (RefClass(cComChilkatCrypt2)) To hoCrypt
    If (Not(IsComObjectCreated(hoCrypt))) Begin
        Send CreateComObject of hoCrypt
    End

    Move "correcthorsebatterystaple" To sPassword

    // Derive from the utf-8 byte representation of the password.
    Move "utf-8" To sCharset

    Move "sha256" To sHashAlg

    Set ComEncodingMode Of hoCrypt To "hex"
    Get ComGenRandomBytesENC Of hoCrypt 16 To sSaltHex

    Move 310000 To iIterationCount

    // Derive a 256-bit key from the password.
    Move 256 To iOutputBitLen

    // The derived key is returned as a hex or base64 encoded string.
    // (Note: The salt argument must be a string that also uses
    // the same encoding.)
    Move "hex" To sEnc

    Get ComPbkdf2 Of hoCrypt sPassword sCharset sHashAlg sSaltHex iIterationCount iOutputBitLen sEnc To sHexKey

    Showln sHexKey

    // Sample output:
    // 597734C894FF89CFD3B93D925462C24E97724BCB118F6FC919007F5ABC27E768


End_Procedure