Set the JWE Protected Header

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetProtectedHeader, which sets the integrity-protected JWE header from a JsonObject. The header specifies the key-management algorithm (alg) and content-encryption algorithm (enc).

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

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

    --  Build the JWE protected header.  The "alg" member names the key-management algorithm and the "enc"
    --  member names the content-encryption algorithm.
    DECLARE @header int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @header OUT

    EXEC sp_OAMethod @header, 'UpdateString', @success OUT, 'alg', 'A256KW'
    EXEC sp_OAMethod @header, 'UpdateString', @success OUT, 'enc', 'A256GCM'

    --  Set the protected header on the JWE.  The protected header is integrity-protected and applies to
    --  all recipients.
    EXEC sp_OAMethod @jwe, 'SetProtectedHeader', @success OUT, @header
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @jwe, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @jwe
        EXEC @hr = sp_OADestroy @header
        RETURN
      END

    PRINT 'Protected header set.'

    EXEC @hr = sp_OADestroy @jwe
    EXEC @hr = sp_OADestroy @header


END
GO