(SQL Server) Subject Alternative Name

Demonstrates the usage of the SubjectAlternativeName property to get the certificate SAN (subject alternative name) as XML.

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
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- Note: Not all certificates contain a Subject Alternative Name.
    -- If it does not, the SubjectAlternativeName property will contain the empty string.

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

    DECLARE @success int
    EXEC sp_OAMethod @cert, 'LoadFromFile', @success OUT, 'qa_data/certs/testIcpBrasil.cer'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END

    DECLARE @subjectAltNameXml nvarchar(4000)
    EXEC sp_OAGetProperty @cert, 'SubjectAlternativeName', @subjectAltNameXml OUT


    PRINT @subjectAltNameXml

    -- Here's a sample of the subjectAltNameXml:

    -- <?xml version="1.0" encoding="utf-8"?>
    -- <SubjectAltName>
    --     <name type="oid" oid="2.16.76.1.3.4">...</name>
    --     <name type="oid" oid="2.16.76.1.3.2">...</name>
    --     <name type="oid" oid="2.16.76.1.3.3">...</name>
    --     <name type="oid" oid="2.16.76.1.3.7">...</name>
    --     <rfc822Name>...</rfc822Name>
    -- </SubjectAltName>

    -- The XML can be parsed like this:

    DECLARE @xml int
    -- Use "Chilkat_9_5_0.Xml" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Xml', @xml OUT

    EXEC sp_OAMethod @xml, 'LoadXml', @success OUT, @subjectAltNameXml

    DECLARE @oid nvarchar(4000)

    DECLARE @name nvarchar(4000)

    DECLARE @i int
    SELECT @i = 0
    DECLARE @count_i int
    EXEC sp_OAMethod @xml, 'NumChildrenHavingTag', @count_i OUT, 'name'
    WHILE @i < @count_i
      BEGIN
        EXEC sp_OASetProperty @xml, 'I', @i
        EXEC sp_OAMethod @xml, 'ChilkatPath', @oid OUT, 'name[i]|(oid)'
        EXEC sp_OAMethod @xml, 'GetChildContent', @name OUT, 'name[i]'
        SELECT @i = @i + 1
      END
    DECLARE @rfc822Name nvarchar(4000)
    EXEC sp_OAMethod @xml, 'GetChildContent', @rfc822Name OUT, 'rfc822Name'

    EXEC @hr = sp_OADestroy @cert
    EXEC @hr = sp_OADestroy @xml


END
GO