Set the JWS Protected Header

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetProtectedHeader, which sets the integrity-protected header for a signer from a JsonObject. The header specifies the signature algorithm (alg).

--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    --  Build the JWS protected header.  The "alg" member names the signature algorithm.
    DECLARE @header int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @header OUT

    EXEC sp_OAMethod @header, 'UpdateString', @success OUT, 'alg', 'HS256'

    --  Set the protected header for signer index 0.  The protected header is integrity-protected: it is
    --  covered by the signature.
    EXEC sp_OAMethod @jws, 'SetProtectedHeader', @success OUT, 0, @header
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @jws, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @jws
        EXEC @hr = sp_OADestroy @header
        RETURN
      END

    PRINT 'Protected header set.'

    EXEC @hr = sp_OADestroy @jws
    EXEC @hr = sp_OADestroy @header


END
GO