Chilkat HOME .NET Core C# Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi ActiveX Delphi DLL Go Java Lianja Mono C# Node.js Objective-C PHP ActiveX PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift 2 Swift 3,4,5... Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(Visual Basic 6.0) 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 v9.5.0.71 or later.
' This example requires the Chilkat API to have been previously unlocked. ' See Global Unlock Sample for sample code. Dim crypt As New ChilkatCrypt2 ' Use aes-256-cbc crypt.CryptAlgorithm = "aes" crypt.CipherMode = "cbc" 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: crypt.HashAlgorithm = "sha256" ' This example assumes openssl 1.0.2 was used to encrypt what we're now decrypting: 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: crypt.SetSecretKeyViaPassword "secret" ' Load the file to be decrypted. Dim fileData As New ChilkatBinData Dim success As Long success = fileData.LoadFile("qa_data/openssl_enc/hamlet.enc") ' Decrypt success = crypt.DecryptBd(fileData) ' Save the decrypted output. success = fileData.WriteFile("qa_output/hamlet_dec.xml") Debug.Print "success = " & success |
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.