Visual FoxPro

Create JWT using a Certificate's Private Key

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using a certificate's private key. Visual FoxPro

LOCAL lnSuccess
LOCAL loCert
LOCAL loJwt
LOCAL loJose
LOCAL loClaims
LOCAL lnCurDateTime
LOCAL lcToken

lnSuccess = 0

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

*  Demonstrates how to create a JWT using an certificate's private key.

loCert = CreateObject('Chilkat.Cert')

*  Load an ECC private key from a PEM file.
lnSuccess = loCert.LoadPfxFile("c:/temp/myPfx.pfx","pfxPassword")
IF (lnSuccess <> 1) THEN
    ? loCert.LastErrorText
    RELEASE loCert
    CANCEL
ENDIF

loJwt = CreateObject('Chilkat.Jwt')

*  Build the JOSE header
loJose = CreateObject('Chilkat.JsonObject')
*  Note: The IsEcdsa function was added in Chilkat v10.1.0
IF (loCert.IsEcdsa() = 1) THEN
    *  Use ES256.  Pass the string "ES384" or "ES512" to use ECC with SHA-384 or SHA-512.
    loJose.AppendString("alg","ES256")
ELSE
    *  Probably RSA...
    *  Use RS256.  Pass the string "RS384" or "RS512" to use RSA with SHA-384 or SHA-512.
    loJose.AppendString("alg","RS256")
ENDIF

loJose.AppendString("typ","JWT")

*  Now build the JWT claims (also known as the payload)
loClaims = CreateObject('Chilkat.JsonObject')
loClaims.AppendString("iss","http://example.org")
loClaims.AppendString("sub","John")
loClaims.AppendString("aud","http://example.com")

*  Set the timestamp of when the JWT was created to now.
lnCurDateTime = loJwt.GenNumericDate(0)
loClaims.AddIntAt(-1,"iat",lnCurDateTime)

*  Set the "not process before" timestamp to now.
loClaims.AddIntAt(-1,"nbf",lnCurDateTime)

*  Set the timestamp defining an expiration time (end time) for the token
*  to be now + 1 hour (3600 seconds)
loClaims.AddIntAt(-1,"exp",lnCurDateTime + 3600)

*  Produce the smallest possible JWT:
loJwt.AutoCompact = 1

*  Create the JWT token.
lcToken = loJwt.CreateJwtCert(loJose.Emit(),loClaims.Emit(),loCert)

? lcToken

*  Example output:
*  eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwOi8vZXhhbXBsZS5vcmciLCJzdWIiOiJKb2huIiwiYXVkIjoiaHR0cDovL2V4YW1wbGUuY29tIiwiaWF0IjoxNDg1NzA4NzkyLCJuYmYiOjE0ODU3MDg3OTIsImV4cCI6MTQ4NTcxMjM5Mn0.wqsuyJpxJ073ox-lOiLFqG1lQocXe4hGf2XGZJRrO3qn0UusxI_bu3Gzky8gBsH4sA4u9TWZn5M-1wYMMIJk6Q

RELEASE loCert
RELEASE loJwt
RELEASE loJose
RELEASE loClaims