![]() |
Chilkat HOME Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi DLL Go Java Node.js Objective-C PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(SQL Server) openssl enc decryptDemonstrates how to decrypt a file that was encrypted using "openssl enc". This example shows how to decrypt what was created using this openssl command: openssl enc -e -aes-256-cbc -in hamlet.xml -out hamlet.enc -pass file:./secret.txt This example shows how to do this: openssl enc -d -aes-256-cbc -in hamlet.enc -out hamlet_dec.xml -pass file:./secret.txt Note: This example requires Chilkat v11.1.0 or greater.
-- 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) 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 @crypt int EXEC @hr = sp_OACreate 'Chilkat.Crypt2', @crypt OUT IF @hr <> 0 BEGIN PRINT 'Failed to create ActiveX component' RETURN END -- Use aes-256-cbc EXEC sp_OASetProperty @crypt, 'CryptAlgorithm', 'aes' EXEC sp_OASetProperty @crypt, 'CipherMode', 'cbc' EXEC sp_OASetProperty @crypt, 'KeyLength', 256 -- We'll need to set the hash algorithm to either MD5 or SHA256. -- openssl version 1.0.* or earlier used MD5 by default -- openssl version 1.1.* uses SHA-256 for the password to secret key derivation. -- For example, if openssl 1.1.0 was used, we should do this: EXEC sp_OASetProperty @crypt, 'HashAlgorithm', 'sha256' -- This example assumes openssl 1.0.2 was used to encrypt what we're now decrypting: EXEC sp_OASetProperty @crypt, 'HashAlgorithm', 'md5' -- The openssl command we are duplicating is: -- -- openssl enc -d -aes-256-cbc -in hamlet.enc -out hamlet_dec.xml -pass file:./secret.txt -- -- The file secret.txt contains the word "secret". We could write code to load the contents -- of secret.txt, but instead we'll just do this: EXEC sp_OAMethod @crypt, 'SetEncodedKey', NULL, 'secret', 'openssl' -- Load the file to be decrypted. DECLARE @fileData int EXEC @hr = sp_OACreate 'Chilkat.BinData', @fileData OUT EXEC sp_OAMethod @fileData, 'LoadFile', @success OUT, 'qa_data/openssl_enc/hamlet.enc' -- Decrypt EXEC sp_OASetProperty @crypt, 'VerboseLogging', 1 EXEC sp_OAMethod @crypt, 'DecryptBd', @success OUT, @fileData EXEC sp_OAGetProperty @crypt, 'LastErrorText', @sTmp0 OUT PRINT @sTmp0 -- Save the decrypted output. EXEC sp_OAMethod @fileData, 'WriteFile', @success OUT, 'c:/temp/qa_output/hamlet_dec.xml' PRINT 'success = ' + @success EXEC @hr = sp_OADestroy @crypt EXEC @hr = sp_OADestroy @fileData END GO |
© 2000-2025 Chilkat Software, Inc. All Rights Reserved.