PureBasic

PBKDF1 - Derive Key from Password

See more Encryption Examples

Demonstrates how to derive a symmetric encryption key from a password using PBKDF1. This example matches the results found at this URL: http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

It also matches the output produced by the .NET Framework using this C# code:

            byte[] salt = new byte[] { 0x78, 0x57, 0x8E, 0x5A, 0x5D, 0x63, 0xCB, 0x06 };
            PasswordDeriveBytes cdk = new PasswordDeriveBytes("password", salt);

            cdk.IterationCount = 1000;
            cdk.HashName = "SHA1";

            // generate a 16-byte key
            byte[] key = cdk.GetBytes(16);

PureBasic

IncludeFile "CkCrypt2.pb"

Procedure ChilkatExample()

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

    crypt.i = CkCrypt2::ckCreate()
    If crypt.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    hexKey.s
    ; http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

    pw.s = "password"
    pwCharset.s = "ansi"
    ; Hash algorithms may be: sha1, md2, md5, etc.
    hashAlg.s = "sha1"
    ; The salt should be 8 bytes:
    saltHex.s = "78578E5A5D63CB06"
    iterationCount.i = 1000
    ; Derive a 128-bit key from the password.
    outputBitLen.i = 128

    ; 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.)
    enc.s = "hex"

    hexKey = CkCrypt2::ckPbkdf1(crypt,pw,pwCharset,hashAlg,saltHex,iterationCount,outputBitLen,enc)

    Debug hexKey

    ; The output should have this value:
    ; DC19847E05C64D2FAF10EBFB4A3D2A2


    CkCrypt2::ckDispose(crypt)


    ProcedureReturn
EndProcedure