(SQL Server) HMAC MD5 to Match RFC 2022 Test Vectors

Demonstrates using Chilkat in SQL Server to computer HMAC MD5 message authentication codes to match the test vectors given by RFC 2202.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- This example assumes the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @crypt int
    -- Use "Chilkat_9_5_0.Crypt2" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Crypt2', @crypt OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- The output will be Hex, so set the EncodingMode:
    EXEC sp_OASetProperty @crypt, 'EncodingMode', 'hex'

    -- Set the hash algorithm:
    -- Choices are: md5, sha-1, sha256, sha384, sha512, md2, haval
    EXEC sp_OASetProperty @crypt, 'HashAlgorithm', 'md5'

    DECLARE @mac nvarchar(4000)

    -- Set the HMAC key:
    EXEC sp_OAMethod @crypt, 'SetHmacKeyEncoded', NULL, '0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b', 'hex'
    EXEC sp_OAMethod @crypt, 'HmacStringENC', @mac OUT, 'Hi There'

    PRINT @mac

    EXEC sp_OAMethod @crypt, 'SetHmacKeyEncoded', NULL, 'Jefe', 'ansi'
    EXEC sp_OAMethod @crypt, 'HmacStringENC', @mac OUT, 'what do ya want for nothing?'

    PRINT @mac

    EXEC @hr = sp_OADestroy @crypt


END
GO