(Lianja) 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.

Chilkat Lianja Extension Download Chilkat Lianja Extension

// 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("CkCert")

// Load an ECC private key from a PEM file.
llSuccess = loCert.LoadPfxFile("c:/temp/myPfx.pfx","pfxPassword")
if (llSuccess <> .T.) then
    ? loCert.LastErrorText
    release loCert
    return
endif

loJwt = createobject("CkJwt")

// Build the JOSE header
loJose = createobject("CkJsonObject")
// Note: The IsEcdsa function was added in Chilkat v10.1.0
if (loCert.IsEcdsa() = .T.) 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("CkJsonObject")
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 = .T.

// 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