(SQL Server) Generate new DSA Key from OpenSSL Parameters File

Generates a new DSA key from an OpenSSL-created parameters file (DER and PEM formats supported). Examples of using OpenSSL to create parameter files are shown here:

openssl dsaparam -outform DER 1024 <  seedData.txt >dsaparam.der

openssl dsaparam 1024 < seedData.txt >dsaparam.pem

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)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

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

    DECLARE @success int
    EXEC sp_OAMethod @dsa, 'GenKeyFromParamsDerFile', @success OUT, 'dsaparam.der'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @dsa, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @dsa
        RETURN
      END

    -- To generate a key from PEM, call GenKeyFromParamsPem 
    -- (for an in-memory PEM string) or GenKeyFromParamsFilePem
    -- for a PEM file.

    -- The public and private keys may now be exported to PEM, DER,
    -- and XML formatted files.

    DECLARE @pemStr nvarchar(4000)

    DECLARE @xmlStr nvarchar(4000)

    -- First for the public key...
    -- The public key never needs to be encrypted.

    -- Save the public key in PEM format:
    EXEC sp_OAMethod @dsa, 'ToPublicPem', @pemStr OUT
    -- This example will not check the return value of SaveText...
    EXEC sp_OAMethod @dsa, 'SaveText', @success OUT, @pemStr, 'dsa_pub.pem'

    -- Save the public key in DER format:
    EXEC sp_OAMethod @dsa, 'ToPublicDerFile', @success OUT, 'dsa_pub.der'

    DECLARE @bPublicOnly int
    SELECT @bPublicOnly = 1
    -- Save to XML
    EXEC sp_OAMethod @dsa, 'ToXml', @xmlStr OUT, @bPublicOnly
    EXEC sp_OAMethod @dsa, 'SaveText', @success OUT, @pemStr, 'dsa_pub.xml'

    -- ------------------------------------
    -- Now for the private key....
    -- ------------------------------------

    -- Unencrypted PEM:
    EXEC sp_OAMethod @dsa, 'ToPem', @pemStr OUT
    EXEC sp_OAMethod @dsa, 'SaveText', @success OUT, @pemStr, 'dsa_priv.pem'

    -- Encrypted PEM:
    EXEC sp_OAMethod @dsa, 'ToEncryptedPem', @pemStr OUT, 'myPassword'
    EXEC sp_OAMethod @dsa, 'SaveText', @success OUT, @pemStr, 'dsa_privEncrypted.pem'

    -- DER:
    EXEC sp_OAMethod @dsa, 'ToDerFile', @success OUT, 'dsa_priv.der'

    -- XML:
    SELECT @bPublicOnly = 0
    EXEC sp_OAMethod @dsa, 'ToXml', @xmlStr OUT, @bPublicOnly
    EXEC sp_OAMethod @dsa, 'SaveText', @success OUT, @pemStr, 'dsa_priv.xml'


    PRINT 'Finished!'

    EXEC @hr = sp_OADestroy @dsa


END
GO