SQL Server Requires Chilkat v11.0.0+

Duplicate openssl dgst -sha256 -sign private.pem -out sha256.sig in.dat

See more OpenSSL Examples

Demonstrates how to duplicate this OpenSSL command:

openssl dgst -sha256 -sign private.pem -out sha256.sig in.dat

The in.dat file can contain text or binary data of any type. The OpenSSL command does the following:

1. Creates a SHA256 digest of the contents of the input file
2. Signs the SHA256 digest using the private key.

SQL Server

--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    DECLARE @pkey int
    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:
    EXEC sp_OAMethod @pkey, 'LoadPemFile', @success OUT, 'private.pem'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pkey, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkey
        RETURN
      END

    DECLARE @rsa int
    EXEC @hr = sp_OACreate 'Chilkat.Rsa', @rsa OUT

    --  Import the private key into the RSA component:
    EXEC sp_OAMethod @rsa, 'UsePrivateKey', @success OUT, @pkey
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @rsa, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkey
        EXEC @hr = sp_OADestroy @rsa
        RETURN
      END

    --  OpenSSL uses big-endian.
    EXEC sp_OASetProperty @rsa, 'LittleEndian', 0

    --  Load the file to be signed.
    DECLARE @bdFileData int
    EXEC @hr = sp_OACreate 'Chilkat.BinData', @bdFileData OUT

    EXEC sp_OAMethod @bdFileData, 'LoadFile', @success OUT, 'in.dat'

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

    EXEC sp_OAMethod @rsa, 'SignBd', @success OUT, @bdFileData, 'sha256', @bdSig
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @rsa, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pkey
        EXEC @hr = sp_OADestroy @rsa
        EXEC @hr = sp_OADestroy @bdFileData
        EXEC @hr = sp_OADestroy @bdSig
        RETURN
      END

    --  Save the binary signature to a file.
    EXEC sp_OAMethod @bdSig, 'WriteFile', @success OUT, 'signature.sig'
    IF @success <> 1
      BEGIN

        PRINT 'Failed to write signature.sig.'
        EXEC @hr = sp_OADestroy @pkey
        EXEC @hr = sp_OADestroy @rsa
        EXEC @hr = sp_OADestroy @bdFileData
        EXEC @hr = sp_OADestroy @bdSig
        RETURN
      END


    PRINT 'Success.'

    EXEC @hr = sp_OADestroy @pkey
    EXEC @hr = sp_OADestroy @rsa
    EXEC @hr = sp_OADestroy @bdFileData
    EXEC @hr = sp_OADestroy @bdSig


END
GO