SQL Server

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. SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @sTmp1 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 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.

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

    -- Load an ECC private key from a PEM file.
    EXEC sp_OAMethod @cert, 'LoadPfxFile', @success OUT, 'c:/temp/myPfx.pfx', 'pfxPassword'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END

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

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

    -- Note: The IsEcdsa function was added in Chilkat v10.1.0
    EXEC sp_OAMethod @cert, 'IsEcdsa', @iTmp0 OUT
    IF @iTmp0 = 1
      BEGIN
        -- 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'
      END
    ELSE
      BEGIN
        -- Probably RSA...
        -- Use RS256.  Pass the string "RS384" or "RS512" to use RSA with SHA-384 or SHA-512.
        EXEC sp_OAMethod @jose, 'AppendString', @success OUT, 'alg', 'RS256'
      END

    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.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.
    DECLARE @token nvarchar(4000)
    EXEC sp_OAMethod @jose, 'Emit', @sTmp0 OUT
    EXEC sp_OAMethod @claims, 'Emit', @sTmp1 OUT
    EXEC sp_OAMethod @jwt, 'CreateJwtCert', @token OUT, @sTmp0, @sTmp1, @cert


    PRINT @token

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

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


END
GO