Oranzh · March 24, 2018 04:19 · Feb 22, 2018 · Feb 22, 2018 · Feb 22, 2018 · Feb 22, 2018
diff --git a/with_bcrypt_password_hash.md b/with_bcrypt_password_hash.md
@@ -7,7 +7,7 @@ A more secure password should contain a cost factor. Here is the complete exampl
 ```php
 <?php
 
-$plaintext = 'My secret message 1234 Сейчас в СМИ';
+$plaintext = 'My secret message 1234';
 $password = '3sc3RLrpd17';
 $method = 'aes-256-cbc';
 

diff --git a/with_bcrypt_password_hash.md b/with_bcrypt_password_hash.md
@@ -36,6 +36,12 @@ In C# you have to install the [BCrypt-Official package](https://www.nuget.org/pa
 generate a hash password like this:
 
 ```csharp
+
+using System.Security.Cryptography;
+using System.IO;
+using System.Text;
+using System;
+
 public string EncryptString(string plainText, byte[] key, byte[] iv)
 {
     // Instantiate a new Aes object to perform string symmetric encryption

diff --git a/with_bcrypt_password_hash.md b/with_bcrypt_password_hash.md
@@ -1,6 +1,10 @@
-A more secure password should contain a cost factor.
+## Version 2
 
-```
+A more secure password should contain a cost factor. Here is the complete example code:
+
+### PHP
+
+```php
 <?php
 
 $plaintext = 'My secret message 1234 Сейчас в СМИ';
@@ -26,6 +30,8 @@ echo 'decrypted to: ' . $decrypted . "\n\n";
 
 ```
 
+### C#
+
 In C# you have to install the [BCrypt-Official package](https://www.nuget.org/packages/BCrypt-Official/) and 
 generate a hash password like this:
 

diff --git a/AES-256 encryption and decryption in PHP and C#.md b/AES-256 encryption and decryption in PHP and C#.md
@@ -1,5 +1,7 @@
 # AES-256 encryption and decryption in PHP and C#
 
+**Update**: There is a more secure version available. [Details](#file-with_bcrypt_password_hash-md)
+
 ## PHP
 
 ```php

diff --git a/with_bcrypt_password_hash.md b/with_bcrypt_password_hash.md
@@ -0,0 +1,156 @@
+A more secure password should contain a cost factor.
+
+```
+<?php
+
+$plaintext = 'My secret message 1234 Сейчас в СМИ';
+$password = '3sc3RLrpd17';
+$method = 'aes-256-cbc';
+
+$key = password_hash($password, PASSWORD_BCRYPT, ['cost' => 12]);
+echo "Key:" . $key . "\n";
+
+// IV must be exact 16 chars (128 bit)
+$iv = chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0);
+
+// av3DYGLkwBsErphcyYp+imUW4QKs19hUnFyyYcXwURU=
+$encrypted = base64_encode(openssl_encrypt($plaintext, $method, $key, OPENSSL_RAW_DATA, $iv));
+
+// My secret message 1234
+$decrypted = openssl_decrypt(base64_decode($encrypted), $method, $key, OPENSSL_RAW_DATA, $iv);
+
+echo 'plaintext=' . $plaintext . "\n";
+echo 'cipher=' . $method . "\n";
+echo 'encrypted to: ' . $encrypted . "\n";
+echo 'decrypted to: ' . $decrypted . "\n\n";
+
+```
+
+In C# you have to install the [BCrypt-Official package](https://www.nuget.org/packages/BCrypt-Official/) and 
+generate a hash password like this:
+
+```csharp
+public string EncryptString(string plainText, byte[] key, byte[] iv)
+{
+    // Instantiate a new Aes object to perform string symmetric encryption
+    Aes encryptor = Aes.Create();
+
+    encryptor.Mode = CipherMode.CBC;
+    //encryptor.KeySize = 256;
+    //encryptor.BlockSize = 128;
+    //encryptor.Padding = PaddingMode.Zeros;
+
+    // Set key and IV
+    encryptor.Key = key.Take(32).ToArray();
+    encryptor.IV = iv;
+
+    // Instantiate a new MemoryStream object to contain the encrypted bytes
+    MemoryStream memoryStream = new MemoryStream();
+
+    // Instantiate a new encryptor from our Aes object
+    ICryptoTransform aesEncryptor = encryptor.CreateEncryptor();
+
+    // Instantiate a new CryptoStream object to process the data and write it to the 
+    // memory stream
+    CryptoStream cryptoStream = new CryptoStream(memoryStream, aesEncryptor, CryptoStreamMode.Write);
+
+    // Convert the plainText string into a byte array
+    byte[] plainBytes = Encoding.ASCII.GetBytes(plainText);
+
+    // Encrypt the input plaintext string
+    cryptoStream.Write(plainBytes, 0, plainBytes.Length);
+
+    // Complete the encryption process
+    cryptoStream.FlushFinalBlock();
+
+    // Convert the encrypted data from a MemoryStream to a byte array
+    byte[] cipherBytes = memoryStream.ToArray();
+
+    // Close both the MemoryStream and the CryptoStream
+    memoryStream.Close();
+    cryptoStream.Close();
+
+    // Convert the encrypted byte array to a base64 encoded string
+    string cipherText = Convert.ToBase64String(cipherBytes, 0, cipherBytes.Length);
+
+    // Return the encrypted data as a string
+    return cipherText;
+}
+
+public string DecryptString(string cipherText, byte[] key, byte[] iv)
+{
+    // Instantiate a new Aes object to perform string symmetric encryption
+    Aes encryptor = Aes.Create();
+
+    encryptor.Mode = CipherMode.CBC;
+    //encryptor.KeySize = 256;
+    //encryptor.BlockSize = 128;
+    //encryptor.Padding = PaddingMode.Zeros;
+
+    // Set key and IV
+    encryptor.Key = key.Take(32).ToArray();
+    encryptor.IV = iv;
+
+    // Instantiate a new MemoryStream object to contain the encrypted bytes
+    MemoryStream memoryStream = new MemoryStream();
+
+    // Instantiate a new encryptor from our Aes object
+    ICryptoTransform aesDecryptor = encryptor.CreateDecryptor();
+
+    // Instantiate a new CryptoStream object to process the data and write it to the 
+    // memory stream
+    CryptoStream cryptoStream = new CryptoStream(memoryStream, aesDecryptor, CryptoStreamMode.Write);
+
+    // Will contain decrypted plaintext
+    string plainText = String.Empty;
+
+    try
+    {
+        // Convert the ciphertext string into a byte array
+        byte[] cipherBytes = Convert.FromBase64String(cipherText);
+
+        // Decrypt the input ciphertext string
+        cryptoStream.Write(cipherBytes, 0, cipherBytes.Length);
+
+        // Complete the decryption process
+        cryptoStream.FlushFinalBlock();
+
+        // Convert the decrypted data from a MemoryStream to a byte array
+        byte[] plainBytes = memoryStream.ToArray();
+
+        // Convert the decrypted byte array to string
+        plainText = Encoding.ASCII.GetString(plainBytes, 0, plainBytes.Length);
+    }
+    finally
+    {
+        // Close both the MemoryStream and the CryptoStream
+        memoryStream.Close();
+        cryptoStream.Close();
+    }
+
+    // Return the decrypted data as a string
+    return plainText;
+}
+```
+
+### Usage
+
+```csharp
+string message = "My secret message 1234";
+string password = "3sc3RLrpd17";
+
+// hash the password with BCrypt
+string hashedPassword = BCrypt.Net.BCrypt.HashPassword(password, 12);
+
+// Convert hashed password to array
+byte[] key = Encoding.ASCII.GetBytes(hashedPassword);
+
+// Create secret IV
+byte[] iv = new byte[16] { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };
+
+string encrypted = this.EncryptString(message, key, iv);
+string decrypted = this.DecryptString(encrypted, key, iv);
+
+Console.WriteLine(encrypted);
+Console.WriteLine(decrypted);
+```
diff --git a/AES-256 encryption and decryption in PHP and C#.md b/AES-256 encryption and decryption in PHP and C#.md
@@ -1,4 +1,4 @@
-# AES-256 encryption and decryption in PHP  and C#
+# AES-256 encryption and decryption in PHP and C#
 
 ## PHP
 

diff --git a/AES-256 encryption and decryption in PHP and C#.md b/AES-256 encryption and decryption in PHP and C#.md
@@ -123,15 +123,15 @@ public string DecryptString(string cipherText, byte[] key, byte[] iv)
         // Convert the decrypted data from a MemoryStream to a byte array
         byte[] plainBytes = memoryStream.ToArray();
 
-        // Convert the encrypted byte array to string
+        // Convert the decrypted byte array to string
         plainText = Encoding.ASCII.GetString(plainBytes, 0, plainBytes.Length);
     } finally {
         // Close both the MemoryStream and the CryptoStream
         memoryStream.Close();
         cryptoStream.Close();
     }
 
-    // Return the encrypted data as a string
+    // Return the decrypted data as a string
     return plainText;
 }
 ```

diff --git a/AES-256 encryption and decryption in PHP and C#.md b/AES-256 encryption and decryption in PHP and C#.md
@@ -123,7 +123,7 @@ public string DecryptString(string cipherText, byte[] key, byte[] iv)
         // Convert the decrypted data from a MemoryStream to a byte array
         byte[] plainBytes = memoryStream.ToArray();
 
-        // Convert the encrypted byte array to a base64 encoded string
+        // Convert the encrypted byte array to string
         plainText = Encoding.ASCII.GetString(plainBytes, 0, plainBytes.Length);
     } finally {
         // Close both the MemoryStream and the CryptoStream

diff --git a/AES-256 encryption and decryption in PHP and C#.md b/AES-256 encryption and decryption in PHP and C#.md
@@ -31,6 +31,11 @@ echo 'decrypted to: ' . $decrypted . "\n\n";
 ## C#
 
 ```csharp
+using System.Security.Cryptography;
+using System.IO;
+using System.Text;
+using System;
+
 public string EncryptString(string plainText, byte[] key, byte[] iv)
 {
     // Instantiate a new Aes object to perform string symmetric encryption
@@ -62,7 +67,7 @@ public string EncryptString(string plainText, byte[] key, byte[] iv)
     cryptoStream.Write(plainBytes, 0, plainBytes . Length);
 
     // Complete the encryption process
-    cryptoStream . FlushFinalBlock();
+    cryptoStream.FlushFinalBlock();
 
     // Convert the encrypted data from a MemoryStream to a byte array
     byte[] cipherBytes = memoryStream.ToArray();

diff --git a/... & Decrypt C# function to PHP function.md → ...cryption and decryption in PHP and C#.md b/... & Decrypt C# function to PHP function.md → ...cryption and decryption in PHP and C#.md
diff --git a/Encrypt & Decrypt C# function to PHP function.md b/Encrypt & Decrypt C# function to PHP function.md
@@ -1,4 +1,4 @@
-# Encrypt & Decrypt C# function to PHP function
+# AES-256 encryption and decryption in PHP  and C#
 
 ## PHP
 
@@ -138,7 +138,7 @@ string message = "My secret message 1234";
 string password = "3sc3RLrpd17";
 
 // Create sha256 hash
-SHA256 mySHA256 = SHA256Managed . Create();
+SHA256 mySHA256 = SHA256Managed.Create();
 byte[] key = mySHA256.ComputeHash(Encoding.ASCII.GetBytes(password));
 
 // Create secret IV

diff --git a/Encrypt & Decrypt C# function to PHP function.md b/Encrypt & Decrypt C# function to PHP function.md
@@ -34,45 +34,45 @@ echo 'decrypted to: ' . $decrypted . "\n\n";
 public string EncryptString(string plainText, byte[] key, byte[] iv)
 {
     // Instantiate a new Aes object to perform string symmetric encryption
-    Aes encryptor = Aes . Create();
+    Aes encryptor = Aes.Create();
 
-    encryptor . Mode = CipherMode . CBC;
+    encryptor.Mode = CipherMode.CBC;
     //encryptor.KeySize = 256;
     //encryptor.BlockSize = 128;
     //encryptor.Padding = PaddingMode.Zeros;
 
     // Set key and IV
-    encryptor . Key = key;
-    encryptor . IV = iv;
+    encryptor.Key = key;
+    encryptor.IV = iv;
 
     // Instantiate a new MemoryStream object to contain the encrypted bytes
     MemoryStream memoryStream = new MemoryStream();
 
     // Instantiate a new encryptor from our Aes object
-    ICryptoTransform aesEncryptor = encryptor . CreateEncryptor();
+    ICryptoTransform aesEncryptor = encryptor.CreateEncryptor();
 
     // Instantiate a new CryptoStream object to process the data and write it to the 
     // memory stream
     CryptoStream cryptoStream = new CryptoStream(memoryStream, aesEncryptor, CryptoStreamMode . Write);
 
     // Convert the plainText string into a byte array
-    byte[] plainBytes = Encoding . ASCII . GetBytes(plainText);
+    byte[] plainBytes = Encoding.ASCII.GetBytes(plainText);
 
     // Encrypt the input plaintext string
-    cryptoStream . Write(plainBytes, 0, plainBytes . Length);
+    cryptoStream.Write(plainBytes, 0, plainBytes . Length);
 
     // Complete the encryption process
     cryptoStream . FlushFinalBlock();
 
     // Convert the encrypted data from a MemoryStream to a byte array
-    byte[] cipherBytes = memoryStream . ToArray();
+    byte[] cipherBytes = memoryStream.ToArray();
 
     // Close both the MemoryStream and the CryptoStream
-    memoryStream . Close();
-    cryptoStream . Close();
+    memoryStream.Close();
+    cryptoStream.Close();
 
     // Convert the encrypted byte array to a base64 encoded string
-    string cipherText = Convert . ToBase64String(cipherBytes, 0, cipherBytes . Length);
+    string cipherText = Convert.ToBase64String(cipherBytes, 0, cipherBytes.Length);
 
     // Return the encrypted data as a string
     return cipherText;
@@ -81,49 +81,49 @@ public string EncryptString(string plainText, byte[] key, byte[] iv)
 public string DecryptString(string cipherText, byte[] key, byte[] iv)
 {
     // Instantiate a new Aes object to perform string symmetric encryption
-    Aes encryptor = Aes . Create();
+    Aes encryptor = Aes.Create();
 
-    encryptor . Mode = CipherMode . CBC;
+    encryptor.Mode = CipherMode.CBC;
     //encryptor.KeySize = 256;
     //encryptor.BlockSize = 128;
     //encryptor.Padding = PaddingMode.Zeros;
 
     // Set key and IV
-    encryptor . Key = key;
-    encryptor . IV = iv;
+    encryptor.Key = key;
+    encryptor.IV = iv;
 
     // Instantiate a new MemoryStream object to contain the encrypted bytes
     MemoryStream memoryStream = new MemoryStream();
 
     // Instantiate a new encryptor from our Aes object
-    ICryptoTransform aesDecryptor = encryptor . CreateDecryptor();
+    ICryptoTransform aesDecryptor = encryptor.CreateDecryptor();
 
     // Instantiate a new CryptoStream object to process the data and write it to the 
     // memory stream
     CryptoStream cryptoStream = new CryptoStream(memoryStream, aesDecryptor, CryptoStreamMode . Write);
 
     // Will contain decrypted plaintext
-    string plainText = String . Empty;
+    string plainText = String.Empty;
 
     try {
         // Convert the ciphertext string into a byte array
-        byte[] cipherBytes = Convert . FromBase64String(cipherText);
+        byte[] cipherBytes = Convert.FromBase64String(cipherText);
 
         // Decrypt the input ciphertext string
-        cryptoStream . Write(cipherBytes, 0, cipherBytes . Length);
+        cryptoStream.Write(cipherBytes, 0, cipherBytes . Length);
 
         // Complete the decryption process
-        cryptoStream . FlushFinalBlock();
+        cryptoStream.FlushFinalBlock();
 
         // Convert the decrypted data from a MemoryStream to a byte array
-        byte[] plainBytes = memoryStream . ToArray();
+        byte[] plainBytes = memoryStream.ToArray();
 
         // Convert the encrypted byte array to a base64 encoded string
-        plainText = Encoding . ASCII . GetString(plainBytes, 0, plainBytes . Length);
+        plainText = Encoding.ASCII.GetString(plainBytes, 0, plainBytes.Length);
     } finally {
         // Close both the MemoryStream and the CryptoStream
-        memoryStream . Close();
-        cryptoStream . Close();
+        memoryStream.Close();
+        cryptoStream.Close();
     }
 
     // Return the encrypted data as a string
@@ -139,17 +139,16 @@ string password = "3sc3RLrpd17";
 
 // Create sha256 hash
 SHA256 mySHA256 = SHA256Managed . Create();
-byte[] key = mySHA256 . ComputeHash(Encoding . ASCII . GetBytes(password));
+byte[] key = mySHA256.ComputeHash(Encoding.ASCII.GetBytes(password));
 
 // Create secret IV
-byte[] iv = new byte[16] {
-0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };
+byte[] iv = new byte[16] { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };
 
-string encrypted = this . EncryptString(message, key, iv);
-string decrypted = this . DecryptString(encrypted, key, iv);
+string encrypted = this.EncryptString(message, key, iv);
+string decrypted = this.DecryptString(encrypted, key, iv);
 
-Console . WriteLine(encrypted);
-Console . WriteLine(decrypted);
+Console.WriteLine(encrypted);
+Console.WriteLine(decrypted);
 ```
 
 

diff --git a/Encrypt & Decrypt C# function to PHP function.md b/Encrypt & Decrypt C# function to PHP function.md
@@ -0,0 +1,156 @@
+# Encrypt & Decrypt C# function to PHP function
+
+## PHP
+
+```php
+<?php
+
+$plaintext = 'My secret message 1234';
+$password = '3sc3RLrpd17';
+$method = 'aes-256-cbc';
+
+// Must be exact 32 chars (256 bit)
+$password = substr(hash('sha256', $password, true), 0, 32);
+echo "Password:" . $password . "\n";
+
+// IV must be exact 16 chars (128 bit)
+$iv = chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0) . chr(0x0);
+
+// av3DYGLkwBsErphcyYp+imUW4QKs19hUnFyyYcXwURU=
+$encrypted = base64_encode(openssl_encrypt($plaintext, $method, $password, OPENSSL_RAW_DATA, $iv));
+
+// My secret message 1234
+$decrypted = openssl_decrypt(base64_decode($encrypted), $method, $password, OPENSSL_RAW_DATA, $iv);
+
+echo 'plaintext=' . $plaintext . "\n";
+echo 'cipher=' . $method . "\n";
+echo 'encrypted to: ' . $encrypted . "\n";
+echo 'decrypted to: ' . $decrypted . "\n\n";
+```
+
+## C#
+
+```csharp
+public string EncryptString(string plainText, byte[] key, byte[] iv)
+{
+    // Instantiate a new Aes object to perform string symmetric encryption
+    Aes encryptor = Aes . Create();
+
+    encryptor . Mode = CipherMode . CBC;
+    //encryptor.KeySize = 256;
+    //encryptor.BlockSize = 128;
+    //encryptor.Padding = PaddingMode.Zeros;
+
+    // Set key and IV
+    encryptor . Key = key;
+    encryptor . IV = iv;
+
+    // Instantiate a new MemoryStream object to contain the encrypted bytes
+    MemoryStream memoryStream = new MemoryStream();
+
+    // Instantiate a new encryptor from our Aes object
+    ICryptoTransform aesEncryptor = encryptor . CreateEncryptor();
+
+    // Instantiate a new CryptoStream object to process the data and write it to the 
+    // memory stream
+    CryptoStream cryptoStream = new CryptoStream(memoryStream, aesEncryptor, CryptoStreamMode . Write);
+
+    // Convert the plainText string into a byte array
+    byte[] plainBytes = Encoding . ASCII . GetBytes(plainText);
+
+    // Encrypt the input plaintext string
+    cryptoStream . Write(plainBytes, 0, plainBytes . Length);
+
+    // Complete the encryption process
+    cryptoStream . FlushFinalBlock();
+
+    // Convert the encrypted data from a MemoryStream to a byte array
+    byte[] cipherBytes = memoryStream . ToArray();
+
+    // Close both the MemoryStream and the CryptoStream
+    memoryStream . Close();
+    cryptoStream . Close();
+
+    // Convert the encrypted byte array to a base64 encoded string
+    string cipherText = Convert . ToBase64String(cipherBytes, 0, cipherBytes . Length);
+
+    // Return the encrypted data as a string
+    return cipherText;
+}
+
+public string DecryptString(string cipherText, byte[] key, byte[] iv)
+{
+    // Instantiate a new Aes object to perform string symmetric encryption
+    Aes encryptor = Aes . Create();
+
+    encryptor . Mode = CipherMode . CBC;
+    //encryptor.KeySize = 256;
+    //encryptor.BlockSize = 128;
+    //encryptor.Padding = PaddingMode.Zeros;
+
+    // Set key and IV
+    encryptor . Key = key;
+    encryptor . IV = iv;
+
+    // Instantiate a new MemoryStream object to contain the encrypted bytes
+    MemoryStream memoryStream = new MemoryStream();
+
+    // Instantiate a new encryptor from our Aes object
+    ICryptoTransform aesDecryptor = encryptor . CreateDecryptor();
+
+    // Instantiate a new CryptoStream object to process the data and write it to the 
+    // memory stream
+    CryptoStream cryptoStream = new CryptoStream(memoryStream, aesDecryptor, CryptoStreamMode . Write);
+
+    // Will contain decrypted plaintext
+    string plainText = String . Empty;
+
+    try {
+        // Convert the ciphertext string into a byte array
+        byte[] cipherBytes = Convert . FromBase64String(cipherText);
+
+        // Decrypt the input ciphertext string
+        cryptoStream . Write(cipherBytes, 0, cipherBytes . Length);
+
+        // Complete the decryption process
+        cryptoStream . FlushFinalBlock();
+
+        // Convert the decrypted data from a MemoryStream to a byte array
+        byte[] plainBytes = memoryStream . ToArray();
+
+        // Convert the encrypted byte array to a base64 encoded string
+        plainText = Encoding . ASCII . GetString(plainBytes, 0, plainBytes . Length);
+    } finally {
+        // Close both the MemoryStream and the CryptoStream
+        memoryStream . Close();
+        cryptoStream . Close();
+    }
+
+    // Return the encrypted data as a string
+    return plainText;
+}
+```
+
+Usage
+
+```csharp
+string message = "My secret message 1234";
+string password = "3sc3RLrpd17";
+
+// Create sha256 hash
+SHA256 mySHA256 = SHA256Managed . Create();
+byte[] key = mySHA256 . ComputeHash(Encoding . ASCII . GetBytes(password));
+
+// Create secret IV
+byte[] iv = new byte[16] {
+0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };
+
+string encrypted = this . EncryptString(message, key, iv);
+string decrypted = this . DecryptString(encrypted, key, iv);
+
+Console . WriteLine(encrypted);
+Console . WriteLine(decrypted);
+```
+
+
+Source: https://stackoverflow.com/a/45574121/1461181