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Visual FoxPro Examples

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(Visual FoxPro) Create JCEKS Containing Secret Keys

Demonstrates how to create a JCEKS keystore file containing symmetric secret keys (for AES, Blowfish, HMAC SHA25, ChaCha20, etc.)

This example requires Chilkat v9.5.0.66 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL loJceks
LOCAL loPrng
LOCAL lcAesKey
LOCAL lcBlowfishKey
LOCAL lcHmacKey
LOCAL lcChachaKey
LOCAL lcEncoding
LOCAL lcPassword
LOCAL lcFilePassword
LOCAL lnSuccess
LOCAL loSbJson
LOCAL loJson

*  IMPORTANT: This example requires Chilkat v9.5.0.66 or greater.

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

loJceks = CreateObject('Chilkat_9_5_0.JavaKeyStore')

*  We'll need a pseudo-random number generator (PRNG) to generate symmetric keys.
loPrng = CreateObject('Chilkat_9_5_0.Prng')

*  Generate some keys..

*  128-bit AES key (16 bytes)
lcAesKey = loPrng.GenRandom(16,"base64")

*  256-bit Blowfish key (32 bytes)
lcBlowfishKey = loPrng.GenRandom(32,"base64")

*  HMAC SHA256 key
*  (An HMAC key can be anything, and any length. We'll use the following string:
lcHmacKey = "This is my HMAC key"

*  ChaCha20 256-bit
lcChachaKey = loPrng.GenRandom(32,"base64")

*  Add each secret key to the JCEKS
lcEncoding = "base64"
lcPassword = "secret"
loJceks.AddSecretKey(lcAesKey,lcEncoding,"AES","my aes key",lcPassword)
loJceks.AddSecretKey(lcBlowfishKey,lcEncoding,"BLOWFISH","my blowfish key",lcPassword)
*  For HMAC, we're using the us-ascii bytes for the key..
loJceks.AddSecretKey(lcHmacKey,"ascii","HMAC_SHA256","my hmac key",lcPassword)
loJceks.AddSecretKey(lcChachaKey,lcEncoding,"CHACHA","my chacha20 key",lcPassword)

lcFilePassword = "password"
*  Write the JCEKs to a file.
lnSuccess = loJceks.ToFile(lcFilePassword,"qa_output/secretKeys.jceks")
IF (lnSuccess <> 1) THEN
    ? loJceks.LastErrorText
    RELEASE loJceks
    RELEASE loPrng
    CANCEL
ENDIF

*  We can also emit as a JWK Set..
loSbJson = CreateObject('Chilkat_9_5_0.StringBuilder')
lnSuccess = loJceks.ToJwkSet("secret",loSbJson)
IF (lnSuccess <> 1) THEN
    ? loJceks.LastErrorText
    RELEASE loJceks
    RELEASE loPrng
    RELEASE loSbJson
    CANCEL
ENDIF

*  Emit the JSON in pretty-printed (indented) form:
loJson = CreateObject('Chilkat_9_5_0.JsonObject')
loJson.LoadSb(loSbJson)
loJson.EmitCompact = 0
? loJson.Emit()

*  Output is:

*  {
*    "keys": [
*      {
*        "kty": "oct",
*        "alg": "AES",
*        "k": "vHekQQB0Gc1NvppapUTW2g",
*        "kid": "my aes key"
*      },
*      {
*        "kty": "oct",
*        "alg": "BLOWFISH",
*        "k": "qHsdXaJsXicVCZbK8l8hJQpYOa0GkiO9gsRK9WLtht8",
*        "kid": "my blowfish key"
*      },
*      {
*        "kty": "oct",
*        "alg": "HMAC_SHA256",
*        "k": "VGhpcyBpcyBteSBITUFDIGtleQ",
*        "kid": "my hmac key"
*      },
*      {
*        "kty": "oct",
*        "alg": "CHACHA",
*        "k": "yNv832U43C9BcWvaQAH2_rG-GwfmpgT5JBRllWGQY1o",
*        "kid": "my chacha20 key"
*      }
*    ]
*  }
* 

RELEASE loJceks
RELEASE loPrng
RELEASE loSbJson
RELEASE loJson


 

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