(SQL Server) Duplicate openssl pkey -in private.pem -pubout -out pubkey.pem

How to output the public part of a private key: Demonstrates how to duplicate this OpenSSL command:

openssl pkey -in private.pem -pubout -out pubkey.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
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @pkey int
    -- Use "Chilkat_9_5_0.PrivateKey" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.PrivateKey', @pkey OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Load the private key from an PEM file:
    DECLARE @success int
    EXEC sp_OAMethod @pkey, 'LoadPemFile', @success OUT, 'private.pem'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @pkey, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkey
        RETURN
      END

    DECLARE @pubKey int
    EXEC sp_OAMethod @pkey, 'GetPublicKey', @pubKey OUT
    EXEC sp_OAGetProperty @pkey, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN
        EXEC sp_OAGetProperty @pkey, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkey
        RETURN
      END

    EXEC sp_OAMethod @pubKey, 'SavePemFile', @success OUT, 0, 'pubKey.pem'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @pubKey, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pubKey

        EXEC @hr = sp_OADestroy @pkey
        RETURN
      END


    PRINT 'Success.'

    EXEC @hr = sp_OADestroy @pubKey


    EXEC @hr = sp_OADestroy @pkey


END
GO