(DataFlex) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Variant vCert
    Handle hoCert
    Boolean iSuccess
    Handle hoJwt
    Handle hoJose
    Handle hoClaims
    Integer iCurDateTime
    String sToken
    String sTemp1
    String sTemp2
    Boolean bTemp1

    // 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.

    Get Create (RefClass(cComChilkatCert)) To hoCert
    If (Not(IsComObjectCreated(hoCert))) Begin
        Send CreateComObject of hoCert
    End

    // Load an ECC private key from a PEM file.
    Get ComLoadPfxFile Of hoCert "c:/temp/myPfx.pfx" "pfxPassword" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoCert To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJwt)) To hoJwt
    If (Not(IsComObjectCreated(hoJwt))) Begin
        Send CreateComObject of hoJwt
    End

    // Build the JOSE header
    Get Create (RefClass(cComChilkatJsonObject)) To hoJose
    If (Not(IsComObjectCreated(hoJose))) Begin
        Send CreateComObject of hoJose
    End
    // Note: The IsEcdsa function was added in Chilkat v10.1.0
    Get ComIsEcdsa Of hoCert To bTemp1
    If (bTemp1 = True) Begin
        // Use ES256.  Pass the string "ES384" or "ES512" to use ECC with SHA-384 or SHA-512.
        Get ComAppendString Of hoJose "alg" "ES256" To iSuccess
    End
    Else Begin
        // Probably RSA...
        // Use RS256.  Pass the string "RS384" or "RS512" to use RSA with SHA-384 or SHA-512.
        Get ComAppendString Of hoJose "alg" "RS256" To iSuccess
    End

    Get ComAppendString Of hoJose "typ" "JWT" To iSuccess

    // Now build the JWT claims (also known as the payload)
    Get Create (RefClass(cComChilkatJsonObject)) To hoClaims
    If (Not(IsComObjectCreated(hoClaims))) Begin
        Send CreateComObject of hoClaims
    End
    Get ComAppendString Of hoClaims "iss" "http://example.org" To iSuccess
    Get ComAppendString Of hoClaims "sub" "John" To iSuccess
    Get ComAppendString Of hoClaims "aud" "http://example.com" To iSuccess

    // Set the timestamp of when the JWT was created to now.
    Get ComGenNumericDate Of hoJwt 0 To iCurDateTime
    Get ComAddIntAt Of hoClaims -1 "iat" iCurDateTime To iSuccess

    // Set the "not process before" timestamp to now.
    Get ComAddIntAt Of hoClaims -1 "nbf" iCurDateTime To iSuccess

    // Set the timestamp defining an expiration time (end time) for the token
    // to be now + 1 hour (3600 seconds)
    Get ComAddIntAt Of hoClaims -1 "exp" (iCurDateTime + 3600) To iSuccess

    // Produce the smallest possible JWT:
    Set ComAutoCompact Of hoJwt To True

    // Create the JWT token.
    Get ComEmit Of hoJose To sTemp1
    Get ComEmit Of hoClaims To sTemp2
    Get pvComObject of hoCert to vCert
    Get ComCreateJwtCert Of hoJwt sTemp1 sTemp2 vCert To sToken

    Showln sToken

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


End_Procedure