(SQL Server) Example: Crypt2.GetSignedAttributes method

Demonstrates how to call the GetSignedAttributes method.

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
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @crypt int
    EXEC @hr = sp_OACreate 'Chilkat.Crypt2', @crypt OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @bdPkcs7 int
    EXEC @hr = sp_OACreate 'Chilkat.BinData', @bdPkcs7 OUT

    DECLARE @success int
    EXEC sp_OAMethod @bdPkcs7, 'LoadFile', @success OUT, 'qa_data/cades/CAdES-T/Signature-C-T-1.p7m'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @bdPkcs7, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @bdPkcs7
        RETURN
      END

    DECLARE @json int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    EXEC sp_OASetProperty @json, 'EmitCompact', 0

    DECLARE @sbJson int
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbJson OUT

    DECLARE @i int
    SELECT @i = 0
    DECLARE @tryNext int
    SELECT @tryNext = 1
    WHILE @tryNext
      BEGIN
        EXEC sp_OAMethod @crypt, 'GetSignedAttributes', @iTmp0 OUT, @i, @bdPkcs7, @sbJson
        IF @iTmp0 = 1
          BEGIN
            EXEC sp_OAMethod @json, 'LoadSb', @success OUT, @sbJson

            PRINT @i + ': '
            EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
            PRINT @sTmp0
          END
        ELSE
          BEGIN
            SELECT @tryNext = 0
          END

        SELECT @i = @i + 1
      END

    -- Sample output:

    -- 0: 
    -- {
    --   "signedAttributes": [
    --     {
    --       "oid": "1.2.840.113549.1.9.3",
    --       "name": "Content Type"
    --     },
    --     {
    --       "oid": "1.2.840.113549.1.9.5",
    --       "name": "Signing Time"
    --     },
    --     {
    --       "oid": "1.2.840.113549.1.9.4",
    --       "name": "Message Digest"
    --     },
    --     {
    --       "oid": "1.2.840.113549.1.9.16.2.47",
    --       "name": "Signing Certificate V2"
    --     }
    --   ]
    -- }

    EXEC @hr = sp_OADestroy @crypt
    EXEC @hr = sp_OADestroy @bdPkcs7
    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @sbJson


END
GO