You are reading the entire file at the start of the method: byte[] bytesToBeEncrypted = File.ReadAllBytes(file); This is causing the OutOfMemoryException. Here’s an idea of how you’d do this: static void EncryptFile(string file, string password) { byte[] passwordBytes = Encoding.UTF8.GetBytes(password); byte[] salt = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 }; … Read more
Made it! After a long time of searching thanks to all you guys who answered this post i used the bouncy castle library and i’ve decrypt the desired String by doing the following: public static String decrypt(String valueToDecrypt) throws Exception { AESCrypt enc = new AESCrypt(); return new String(enc.decryptInternal(valueToDecrypt)).trim(); } private byte[] decryptInternal(String code) throws … Read more
I am do that i am need. New code: [Reflection.Assembly]::LoadWithPartialName(“System.Security”) $String=$buff #ARRAY OF BYTES TO ENCODE $Passphrase=”Pas” $salt=”My Voice is my P455W0RD!” $init=”Yet another key” $r = new-Object System.Security.Cryptography.AesManaged $pass = [Text.Encoding]::UTF8.GetBytes($Passphrase) $salt = [Text.Encoding]::UTF8.GetBytes($salt) $r.Key = (new-Object Security.Cryptography.PasswordDeriveBytes $pass, $salt, “SHA1″, 5).GetBytes(32) #256/8 $r.IV = (new-Object Security.Cryptography.SHA1Managed).ComputeHash( [Text.Encoding]::UTF8.GetBytes($init) )[0..15] $r.Padding=”Zeros” $c = $r.CreateEncryptor() $ms … Read more
Finally I realized what was the problem it was in displaying the encrypted and decrypted strings when I tried result=QString::fromLocal8Bit((char*)ciphertext); it worked fine and showed the original text. solved Wrong Encryption (QT c++ OpenSSL AES 256 CBC)
The below code is doing a complete file encryption and decryption and is compatible to the OpenSSL commands encrypt: openssl enc -aes-256-cbc -pass pass:testpass -d -p -in plaintext.txt -out plaintext.txt.crypt -md md5 decrypt: openssl aes-256-cbc -d -in plaintext.txt.crypt -out plaintext1.txt -k testpass -md md5 I left out some variables as they are not used in … Read more
(As suggested, I’ve replaced my previous salt generation method with something that should be more secure) To generate a random salt: public static string GenerateRandomSalt(RNGCryptoServiceProvider rng, int size) { var bytes = new Byte[size]; rng.GetBytes(bytes); return Convert.ToBase64String(bytes); } var rng = new RNGCryptoServiceProvider(); var salt1 = GenerateRandomSalt(rng, 16); var salt2 = GenerateRandomSalt(rng, 16); // etc. … Read more