DSA Public Key PEM to DER Conversion

Converts a DSA public key from PEM format to DER.

Download Chilkat DSA ActiveX

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int

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

    EXEC sp_OAMethod @dsa, 'UnlockComponent', @success OUT, 'Anything for 30-day trial'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @dsa, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        RETURN
      END

    --  Load a PEM public key.
    DECLARE @pemPublicKey nvarchar(4000)

    EXEC sp_OAMethod @dsa, 'LoadText', @pemPublicKey OUT, 'dsa_pub.pem'
    --  Import the public key PEM into the DSA object.
    EXEC sp_OAMethod @dsa, 'FromPublicPem', @success OUT, @pemPublicKey
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @dsa, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        RETURN
      END

    --  Write it out as a DER file:
    EXEC sp_OAMethod @dsa, 'ToPublicDerFile', @success OUT, 'dsa_pub.der'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @dsa, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        RETURN
      END

    PRINT 'Finished!'
END
GO