Sign a JWS with an HMAC Key from BinData

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetMacKeyBd, which sets the symmetric MAC key for a signature from the raw bytes in a BinData.

-- 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
    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

    --  Protected header specifying HMAC-SHA256.
    DECLARE @header int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @header OUT

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

    DECLARE @bIncludeBom int
    SELECT @bIncludeBom = 0
    EXEC sp_OAMethod @jws, 'SetPayload', @success OUT, 'This is the content to sign.', 'utf-8', @bIncludeBom
    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

    --  Set the symmetric MAC key for signature 0 from the raw bytes in a BinData.  In production, obtain
    --  the key material from a secure source.
    DECLARE @bdKey int
    EXEC @hr = sp_OACreate 'Chilkat.BinData', @bdKey OUT

    EXEC sp_OAMethod @bdKey, 'AppendEncoded', @success OUT, 'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=', 'base64'
    EXEC sp_OAMethod @jws, 'SetMacKeyBd', @success OUT, 0, @bdKey
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @jws, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @jws
        EXEC @hr = sp_OADestroy @header
        EXEC @hr = sp_OADestroy @bdKey
        RETURN
      END

    DECLARE @jwsCompact nvarchar(4000)
    EXEC sp_OAMethod @jws, 'CreateJws', @jwsCompact OUT
    EXEC sp_OAGetProperty @jws, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN
        EXEC sp_OAGetProperty @jws, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @jws
        EXEC @hr = sp_OADestroy @header
        EXEC @hr = sp_OADestroy @bdKey
        RETURN
      END

    PRINT @jwsCompact

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


END
GO