Unity中数据和资源加密（异或加密，AES加密，MD5加密）
在项目开发中，始终会涉及到的一个问题，就是信息安全，在调用接口，或者加载的资源，都会涉及安全问题，因此就出现了各种各样的加密方式。
常见的也是目前用的最广的加密方式，分别是：DES、3DES、AES、MD5、XOR（异或）
其中DES、3DES、AES、MD5用在数据加密中偏多，特别是接口调用数据信息传输上。
XOR异或加密用在资源加密上偏多。
因此很多工程师会整理一个通用的加密工具类，因此我这边也同样整理了一个工具脚本。
但DES和3DES之前项目中没用到过，因此还没整理，等后续如果有碰到会再更新。
下面主要是AES、MD5、XOR加密方式
1、XOR（异或加密）
异或加密其实很简单，就是将二进制明文数据进行异或运算，解密时，只需要对密文再次异或运算即可。异或运算原理是，相同为 0，不同为 1
因此加密代码和解密代码一致，但是根据密钥可以是 单个byte，或者 多个byte，这就导致出现了，更复杂的加密方式，例如对明文数据索引的取余等等。当索引满足什么条件时进行加密，不满足时不进行加密。
例如下方代码
/// 2、MD5加密
MD5码是个很常见的东西，特别是在做资源热更新的，很多公司会对给资源文件一个MD5编码，用作版本管理，判断这个编码是否一致，一致就不更新，不一致就更新资源。但这个编码的计算方式也可以用来做数据的加密。
///
/// 加密数据
///
///
///
///
/// 解密数据
///
///
///
/// 3、AES加密
一度是目前实用最广泛的加密方式，虽然也被发现了破解方式，但安全性以及效率都还是比较高的加密方式，因此还在被广泛的使用中。
提供了几种方法：
1、字符串加密后返回字符串
2、字符串加密后返回字节数组
3、字节数组加密后返回字符串
4、字节数组加密后返回字节数组
/// 字节数组
public static byte[] EncryptToBytesByAes(string content, string key = DefaultPassword, string iv = DefaultPassword)
{
var keyData = System.Text.Encoding.Default.GetBytes(key);
var ivData = System.Text.Encoding.Default.GetBytes(iv);
byte[] encrypted;
// Create an Aes object
// with the specified key and IV.
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.Key = keyData;
aesAlg.IV = ivData;
aesAlg.Mode = System.Security.Cryptography.CipherMode.CBC;
aesAlg.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
// Create an encryptor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform encryptor = aesAlg.CreateEncryptor();
// Create the streams used for encryption.
using (System.IO.MemoryStream msEncrypt = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, encryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
using (System.IO.StreamWriter swEncrypt = new System.IO.StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(content);
}
encrypted = msEncrypt.ToArray();
}
}
}
// Return the encrypted bytes from the memory stream.
return encrypted;
}
/// 字节数组
public static byte[] EncryptToBytesByAes(byte[] content, string key = DefaultPassword, string iv = DefaultPassword)
{
var keyData = System.Text.Encoding.Default.GetBytes(key);
var ivData = System.Text.Encoding.Default.GetBytes(iv);
byte[] encrypted;
// Create an Aes object
// with the specified key and IV.
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.Key = keyData;
aesAlg.IV = ivData;
aesAlg.Mode = System.Security.Cryptography.CipherMode.CBC;
aesAlg.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
// Create an encryptor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform encryptor = aesAlg.CreateEncryptor();
// Create the streams used for encryption.
using (System.IO.MemoryStream msEncrypt = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, encryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
using (System.IO.StreamWriter swEncrypt = new System.IO.StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(content);
}
encrypted = msEncrypt.ToArray();
}
}
}
// Return the encrypted bytes from the memory stream.
return encrypted;
}
/// 字符串
public static string EncryptToStringByAes(string content, string key = DefaultPassword, string iv = DefaultPassword)
{
var keyData = System.Text.Encoding.Default.GetBytes(key);
var ivData = System.Text.Encoding.Default.GetBytes(iv);
byte[] encrypted;
// Create an Aes object
// with the specified key and IV.
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.Key = keyData;
aesAlg.IV = ivData;
aesAlg.Mode = System.Security.Cryptography.CipherMode.CBC;
aesAlg.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
// Create an encryptor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform encryptor = aesAlg.CreateEncryptor();
// Create the streams used for encryption.
using (System.IO.MemoryStream msEncrypt = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, encryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
using (System.IO.StreamWriter swEncrypt = new System.IO.StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(content);
}
encrypted = msEncrypt.ToArray();
}
}
}
// Return the encrypted bytes from the memory stream.
return System.Text.Encoding.Default.GetString(encrypted);
}
/// 字符串
public static string EncryptToStringByAes(byte[] content, string key = DefaultPassword, string iv = DefaultPassword)
{
var keyData = System.Text.Encoding.Default.GetBytes(key);
var ivData = System.Text.Encoding.Default.GetBytes(iv);
byte[] encrypted;
// Create an Aes object
// with the specified key and IV.
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.Key = keyData;
aesAlg.IV = ivData;
aesAlg.Mode = System.Security.Cryptography.CipherMode.CBC;
aesAlg.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
// Create an encryptor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform encryptor = aesAlg.CreateEncryptor();
// Create the streams used for encryption.
using (System.IO.MemoryStream msEncrypt = new System.IO.MemoryStream())
{
using (System.Security.Cryptography.CryptoStream csEncrypt = new System.Security.Cryptography.CryptoStream(msEncrypt, encryptor, System.Security.Cryptography.CryptoStreamMode.Write))
{
using (System.IO.StreamWriter swEncrypt = new System.IO.StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(content);
}
encrypted = msEncrypt.ToArray();
}
}
}
// Return the encrypted bytes from the memory stream.
return System.Text.Encoding.Default.GetString(encrypted);
}
/// 字节数组
public static byte[] DecryptToBytesByAes(byte[] data, string key = DefaultPassword, string iv = DefaultPassword)
{
var keyData = System.Text.Encoding.Default.GetBytes(key);
var ivData = System.Text.Encoding.Default.GetBytes(iv);
// the decrypted text.
byte[] content;
// Create an Aes object
// with the specified key and IV.
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.Key = keyData;
aesAlg.IV = ivData;
aesAlg.Mode = System.Security.Cryptography.CipherMode.CBC;
aesAlg.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
// Create a decryptor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform decryptor = aesAlg.CreateDecryptor();
// Create the streams used for decryption.
using (System.IO.MemoryStream msDecrypt = new System.IO.MemoryStream(data))
{
using (System.Security.Cryptography.CryptoStream csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, decryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
using (System.IO.StreamReader srDecrypt = new System.IO.StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
var Text = srDecrypt.ReadToEnd();
content = System.Text.Encoding.Default.GetBytes(Text);
}
}
}
}
return content;
}
/// 字节数组
public static byte[] DecryptToBytesByAes(string data, string key = DefaultPassword, string iv = DefaultPassword)
{
var keyData = System.Text.Encoding.Default.GetBytes(key);
var ivData = System.Text.Encoding.Default.GetBytes(iv);
// the decrypted text.
byte[] content;
// Create an Aes object
// with the specified key and IV.
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.Key = keyData;
aesAlg.IV = ivData;
aesAlg.Mode = System.Security.Cryptography.CipherMode.CBC;
aesAlg.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
// Create a decryptor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform decryptor = aesAlg.CreateDecryptor();
// Create the streams used for decryption.
using (System.IO.MemoryStream msDecrypt = new System.IO.MemoryStream(System.Text.Encoding.Default.GetBytes(data)))
{
using (System.Security.Cryptography.CryptoStream csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, decryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
using (System.IO.StreamReader srDecrypt = new System.IO.StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
var Text = srDecrypt.ReadToEnd();
content = System.Text.Encoding.Default.GetBytes(Text);
}
}
}
}
return content;
}
/// 字符串
public static string DecryptToStringByAes(byte[] data, string key = DefaultPassword, string iv = DefaultPassword)
{
var keyData = System.Text.Encoding.Default.GetBytes(key);
var ivData = System.Text.Encoding.Default.GetBytes(iv);
// the decrypted text.
string content = string.Empty;
// Create an Aes object
// with the specified key and IV.
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.Key = keyData;
aesAlg.IV = ivData;
aesAlg.Mode = System.Security.Cryptography.CipherMode.CBC;
aesAlg.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
// Create a decryptor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform decryptor = aesAlg.CreateDecryptor();
// Create the streams used for decryption.
using (System.IO.MemoryStream msDecrypt = new System.IO.MemoryStream(data))
{
using (System.Security.Cryptography.CryptoStream csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, decryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
using (System.IO.StreamReader srDecrypt = new System.IO.StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
content = srDecrypt.ReadToEnd();
}
}
}
}
return content;
}
/// 字节数组
public static string DecryptToStringByAes(string data, string key = DefaultPassword, string iv = DefaultPassword)
{
var keyData = System.Text.Encoding.Default.GetBytes(key);
var ivData = System.Text.Encoding.Default.GetBytes(iv);
// the decrypted text.
string content = string.Empty;
// Create an Aes object
// with the specified key and IV.
using (System.Security.Cryptography.Aes aesAlg = System.Security.Cryptography.Aes.Create())
{
aesAlg.Key = keyData;
aesAlg.IV = ivData;
aesAlg.Mode = System.Security.Cryptography.CipherMode.CBC;
aesAlg.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
// Create a decryptor to perform the stream transform.
System.Security.Cryptography.ICryptoTransform decryptor = aesAlg.CreateDecryptor();
// Create the streams used for decryption.
using (System.IO.MemoryStream msDecrypt = new System.IO.MemoryStream(System.Text.Encoding.Default.GetBytes(data)))
{
using (System.Security.Cryptography.CryptoStream csDecrypt = new System.Security.Cryptography.CryptoStream(msDecrypt, decryptor, System.Security.Cryptography.CryptoStreamMode.Read))
{
using (System.IO.StreamReader srDecrypt = new System.IO.StreamReader(csDecrypt))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
content = srDecrypt.ReadToEnd();
}
}
}
}
return content;
}
目前整理的就这几种，之后如果有更新，再更新添加过来。