我正在为一些数据寻找非常简单的混淆(比如加密和解密，但不一定安全)功能。这不是关键任务。我需要一些东西来保持诚实的人诚实，但比ROT13或Base64更强大一点。
我更喜欢一些已经包含在. net框架2.0中的东西，这样我就不必担心任何外部依赖。
我真的不想在公钥/私钥等方面浪费时间。我不太懂加密，但我知道我写的任何东西都是没有价值的……事实上，我可能会把数学搞砸，让它变得微不足道。
当前回答
使用内置的. net Cryptography库，本示例展示如何使用高级加密标准(AES)。
using System;
using System.IO;
using System.Security.Cryptography;
namespace Aes_Example
{
class AesExample
{
public static void Main()
{
try
{
string original = "Here is some data to encrypt!";
// Create a new instance of the Aes
// class. This generates a new key and initialization
// vector (IV).
using (Aes myAes = Aes.Create())
{
// Encrypt the string to an array of bytes.
byte[] encrypted = EncryptStringToBytes_Aes(original, myAes.Key, myAes.IV);
// Decrypt the bytes to a string.
string roundtrip = DecryptStringFromBytes_Aes(encrypted, myAes.Key, myAes.IV);
//Display the original data and the decrypted data.
Console.WriteLine("Original: {0}", original);
Console.WriteLine("Round Trip: {0}", roundtrip);
}
}
catch (Exception e)
{
Console.WriteLine("Error: {0}", e.Message);
}
}
static byte[] EncryptStringToBytes_Aes(string plainText, byte[] Key,byte[] IV)
{
// Check arguments.
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("Key");
byte[] encrypted;
// Create an Aes object
// with the specified key and IV.
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
// Return the encrypted bytes from the memory stream.
return encrypted;
}
static string DecryptStringFromBytes_Aes(byte[] cipherText, byte[] Key, byte[] IV)
{
// Check arguments.
if (cipherText == null || cipherText.Length <= 0)
throw new ArgumentNullException("cipherText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("Key");
// Declare the string used to hold
// the decrypted text.
string plaintext = null;
// Create an Aes object
// with the specified key and IV.
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for decryption.
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
return plaintext;
}
}
}
其他回答
我知道你说过你不关心它有多安全，但如果你选择DES，你也可以选择AES，这是最新的加密方法。
使用内置的. net Cryptography库，本示例展示如何使用高级加密标准(AES)。
using System;
using System.IO;
using System.Security.Cryptography;
namespace Aes_Example
{
class AesExample
{
public static void Main()
{
try
{
string original = "Here is some data to encrypt!";
// Create a new instance of the Aes
// class. This generates a new key and initialization
// vector (IV).
using (Aes myAes = Aes.Create())
{
// Encrypt the string to an array of bytes.
byte[] encrypted = EncryptStringToBytes_Aes(original, myAes.Key, myAes.IV);
// Decrypt the bytes to a string.
string roundtrip = DecryptStringFromBytes_Aes(encrypted, myAes.Key, myAes.IV);
//Display the original data and the decrypted data.
Console.WriteLine("Original: {0}", original);
Console.WriteLine("Round Trip: {0}", roundtrip);
}
}
catch (Exception e)
{
Console.WriteLine("Error: {0}", e.Message);
}
}
static byte[] EncryptStringToBytes_Aes(string plainText, byte[] Key,byte[] IV)
{
// Check arguments.
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("Key");
byte[] encrypted;
// Create an Aes object
// with the specified key and IV.
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for encryption.
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
// Return the encrypted bytes from the memory stream.
return encrypted;
}
static string DecryptStringFromBytes_Aes(byte[] cipherText, byte[] Key, byte[] IV)
{
// Check arguments.
if (cipherText == null || cipherText.Length <= 0)
throw new ArgumentNullException("cipherText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("Key");
// Declare the string used to hold
// the decrypted text.
string plaintext = null;
// Create an Aes object
// with the specified key and IV.
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
// Create the streams used for decryption.
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
return plaintext;
}
}
}
只是想补充一下，我已经改进了Mud的SimplerAES，通过添加一个随机IV，在加密字符串中传递回。这改进了加密，因为加密同一个字符串每次都会产生不同的输出。
public class StringEncryption
{
private readonly Random random;
private readonly byte[] key;
private readonly RijndaelManaged rm;
private readonly UTF8Encoding encoder;
public StringEncryption()
{
this.random = new Random();
this.rm = new RijndaelManaged();
this.encoder = new UTF8Encoding();
this.key = Convert.FromBase64String("Your+Secret+Static+Encryption+Key+Goes+Here=");
}
public string Encrypt(string unencrypted)
{
var vector = new byte[16];
this.random.NextBytes(vector);
var cryptogram = vector.Concat(this.Encrypt(this.encoder.GetBytes(unencrypted), vector));
return Convert.ToBase64String(cryptogram.ToArray());
}
public string Decrypt(string encrypted)
{
var cryptogram = Convert.FromBase64String(encrypted);
if (cryptogram.Length < 17)
{
throw new ArgumentException("Not a valid encrypted string", "encrypted");
}
var vector = cryptogram.Take(16).ToArray();
var buffer = cryptogram.Skip(16).ToArray();
return this.encoder.GetString(this.Decrypt(buffer, vector));
}
private byte[] Encrypt(byte[] buffer, byte[] vector)
{
var encryptor = this.rm.CreateEncryptor(this.key, vector);
return this.Transform(buffer, encryptor);
}
private byte[] Decrypt(byte[] buffer, byte[] vector)
{
var decryptor = this.rm.CreateDecryptor(this.key, vector);
return this.Transform(buffer, decryptor);
}
private byte[] Transform(byte[] buffer, ICryptoTransform transform)
{
var stream = new MemoryStream();
using (var cs = new CryptoStream(stream, transform, CryptoStreamMode.Write))
{
cs.Write(buffer, 0, buffer.Length);
}
return stream.ToArray();
}
}
奖励单元测试
[Test]
public void EncryptDecrypt()
{
// Arrange
var subject = new StringEncryption();
var originalString = "Testing123!£$";
// Act
var encryptedString1 = subject.Encrypt(originalString);
var encryptedString2 = subject.Encrypt(originalString);
var decryptedString1 = subject.Decrypt(encryptedString1);
var decryptedString2 = subject.Decrypt(encryptedString2);
// Assert
Assert.AreEqual(originalString, decryptedString1, "Decrypted string should match original string");
Assert.AreEqual(originalString, decryptedString2, "Decrypted string should match original string");
Assert.AreNotEqual(originalString, encryptedString1, "Encrypted string should not match original string");
Assert.AreNotEqual(encryptedString1, encryptedString2, "String should never be encrypted the same twice");
}
命名空间System.Security.Cryptography包含TripleDESCryptoServiceProvider类和RijndaelManaged类
不要忘记添加对系统的引用。安全大会。
我认为这是世界上最简单的一个!
string encrypted = "Text".Aggregate("", (c, a) => c + (char) (a + 2));
Test
Console.WriteLine(("Hello").Aggregate("", (c, a) => c + (char) (a + 1)));
//Output is Ifmmp
Console.WriteLine(("Ifmmp").Aggregate("", (c, a) => c + (char)(a - 1)));
//Output is Hello
推荐文章
- c#中有任何连接字符串解析器吗?
- 在Linq中转换int到字符串到实体的问题
- 是否可以动态编译和执行c#代码片段?
- 创建自定义MSBuild任务时，如何从c#代码获取当前项目目录?
- c#和Java的主要区别是什么?
- 在c#中创建一个特定时区的DateTime
- .NET中的属性是什么?
- csproj文件中的“Service Include”是干什么用的?
- 如何使用try catch进行异常处理是最佳实践
- 替换字符串中第一次出现的模式
- .NET中字节的字面后缀?
- 如何处理AccessViolationException
- c#忽略证书错误?
- LINQ读取XML
- 如何强制LINQ Sum()返回0而源集合是空的
