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(SQL Server) Create JWT Using ECC (ES256, ES384, or ES512)

Demonstrates how to create a JWT using an ECC private key. This is for JOSE headers with an "alg" of ES256, ES384, or ES512. When ECC is used, the private key signs (creates) the JWT, and the public key is for verification.

This example also demonstrates how to include time constraints:

  • nbf: Not Before Time
  • exp: Expiration Time
  • iat: Issue At Time

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @sTmp1 nvarchar(4000)
    -- Demonstrates how to create a JWT using an ECC private key.

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

    DECLARE @privKey int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.PrivateKey', @privKey OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Load an ECC private key from a PEM file.
    DECLARE @success int
    EXEC sp_OAMethod @privKey, 'LoadPemFile', @success OUT, 'qa_data/pem/ecc_privKey.pem'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @privKey, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @privKey
        RETURN
      END

    DECLARE @jwt int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Jwt', @jwt OUT

    -- Build the JOSE header
    DECLARE @jose int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.JsonObject', @jose OUT

    -- Use ES256.  Pass the string "ES384" or "ES512" to use ECC with SHA-384 or SHA-512.
    EXEC sp_OAMethod @jose, 'AppendString', @success OUT, 'alg', 'ES256'
    EXEC sp_OAMethod @jose, 'AppendString', @success OUT, 'typ', 'JWT'

    -- Now build the JWT claims (also known as the payload)
    DECLARE @claims int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.JsonObject', @claims OUT

    EXEC sp_OAMethod @claims, 'AppendString', @success OUT, 'iss', 'http://example.org'
    EXEC sp_OAMethod @claims, 'AppendString', @success OUT, 'sub', 'John'
    EXEC sp_OAMethod @claims, 'AppendString', @success OUT, 'aud', 'http://example.com'

    -- Set the timestamp of when the JWT was created to now.
    DECLARE @curDateTime int
    EXEC sp_OAMethod @jwt, 'GenNumericDate', @curDateTime OUT, 0
    EXEC sp_OAMethod @claims, 'AddIntAt', @success OUT, -1, 'iat', @curDateTime

    -- Set the "not process before" timestamp to now.
    EXEC sp_OAMethod @claims, 'AddIntAt', @success OUT, -1, 'nbf', @curDateTime

    -- Set the timestamp defining an expiration time (end time) for the token
    -- to be now + 1 hour (3600 seconds)
    EXEC sp_OAMethod @claims, 'AddIntAt', @success OUT, -1, 'exp', @curDateTime + 3600

    -- Produce the smallest possible JWT:
    EXEC sp_OASetProperty @jwt, 'AutoCompact', 1

    -- Create the JWT token.  This is where the ECC signature is created.
    DECLARE @token nvarchar(4000)
    EXEC sp_OAMethod @jose, 'Emit', @sTmp0 OUT
    EXEC sp_OAMethod @claims, 'Emit', @sTmp1 OUT
    EXEC sp_OAMethod @jwt, 'CreateJwtPk', @token OUT, @sTmp0, @sTmp1, @privKey


    PRINT @token

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

    EXEC @hr = sp_OADestroy @privKey
    EXEC @hr = sp_OADestroy @jwt
    EXEC @hr = sp_OADestroy @jose
    EXEC @hr = sp_OADestroy @claims


END
GO

 

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