Xbase++

PBKDF2 Key Derivation

Demonstrates AES secret key derivation from a password using PBDKF2. Xbase++

LOCAL oCrypt
LOCAL cPassword
LOCAL cCharset
LOCAL cHashAlg
LOCAL cSaltHex
LOCAL nIterationCount
LOCAL nOutputBitLen
LOCAL cEnc
LOCAL cHexKey

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

oCrypt := CreateObject("Chilkat.Crypt2")

cPassword := "correcthorsebatterystaple"

//  Derive from the utf-8 byte representation of the password.
cCharset := "utf-8"

cHashAlg := "sha256"

oCrypt:EncodingMode := "hex"
cSaltHex := oCrypt:GenRandomBytesENC(16)

nIterationCount := 310000

//  Derive a 256-bit key from the password.
nOutputBitLen := 256

//  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.)
cEnc := "hex"

cHexKey := oCrypt:Pbkdf2(cPassword, cCharset, cHashAlg, cSaltHex, nIterationCount, nOutputBitLen, cEnc)

? cHexKey

//  Sample output:
//  597734C894FF89CFD3B93D925462C24E97724BCB118F6FC919007F5ABC27E768

oCrypt:destroy()