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(C# UWP/WinRT) 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. Chilkat.Crypt2 crypt = new Chilkat.Crypt2(); // 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. Chilkat.BinData fileData = new Chilkat.BinData(); bool 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.WriteLine("success = " + Convert.ToString(success)); |
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