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Update AesUtils.cs

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1.将默认密钥规则设置为与DES一致
2.经过本地测试
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cryptochecktool 2024-11-26 15:17:43 +08:00 committed by GitHub
parent 98b973152e
commit 817d4f5cbb
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1 changed files with 29 additions and 16 deletions
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v2rayN/ServiceLib/Common/AesUtils.cs
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@ -11,24 +11,23 @@ namespace ServiceLib.Common
private const int IvSize = 16; // AES block size private const int IvSize = 16; // AES block size
private const int Iterations = 10000; private const int Iterations = 10000;
private static readonly byte[] Salt = Encoding.ASCII.GetBytes("saltysalt".PadRight(16, ' '));//google浏览器默认盐值 private static readonly byte[] Salt = Encoding.ASCII.GetBytes("saltysalt".PadRight(16, ' ')); // google浏览器默认盐值
private static readonly string DefaultPassword =Utils.GetHomePath() + "AesUtils";
/// <summary> /// <summary>
/// Encrypt /// Encrypt
/// </summary> /// </summary>
/// <param name="text">Plain text</param> /// <param name="text">Plain text</param>
/// <param name="password">Password for key derivation</param> /// <param name="password">Password for key derivation or direct key in ASCII bytes</param>
/// <returns>Base64 encoded cipher text with IV</returns> /// <returns>Base64 encoded cipher text with IV</returns>
public static string Encrypt(string text, string password) public static string Encrypt(string text, string password = null)
{ {
if (string.IsNullOrEmpty(text)) if (string.IsNullOrEmpty(text))
return string.Empty; return string.Empty;
if (string.IsNullOrEmpty(password))
throw new ArgumentNullException("Password cannot be null.");
byte[] plaintext = Encoding.UTF8.GetBytes(text); byte[] plaintext = Encoding.UTF8.GetBytes(text);
byte[] key = GetDefaultKey(password); byte[] key = GetKey(password);
byte[] iv = GenerateIv(); byte[] iv = GenerateIv();
using (Aes aes = Aes.Create()) using (Aes aes = Aes.Create())
@ -56,24 +55,21 @@ namespace ServiceLib.Common
/// Decrypt /// Decrypt
/// </summary> /// </summary>
/// <param name="cipherTextWithIv">Base64 encoded cipher text with IV</param> /// <param name="cipherTextWithIv">Base64 encoded cipher text with IV</param>
/// <param name="password">Password for key derivation</param> /// <param name="password">Password for key derivation or direct key in ASCII bytes</param>
/// <returns>Plain text</returns> /// <returns>Plain text</returns>
public static string Decrypt(string cipherTextWithIv, string password) public static string Decrypt(string cipherTextWithIv, string password = null)
{ {
if (string.IsNullOrEmpty(cipherTextWithIv)) if (string.IsNullOrEmpty(cipherTextWithIv))
return string.Empty; return string.Empty;
if (string.IsNullOrEmpty(password))
throw new ArgumentNullException("Password cannot be null.");
byte[] cipherTextWithIvBytes = Convert.FromBase64String(cipherTextWithIv); byte[] cipherTextWithIvBytes = Convert.FromBase64String(cipherTextWithIv);
byte[] key = GetDefaultKey(password); byte[] key = GetKey(password);
byte[] iv = new byte[IvSize]; byte[] iv = new byte[IvSize];
Buffer.BlockCopy(cipherTextWithIvBytes, 0, iv, 0, IvSize); Buffer.BlockCopy(cipherTextWithIvBytes, 0, iv, 0, IvSize);
byte[] cipherText = new byte[cipherTextWithIvBytes.Length - IvSize]; byte[] cipherText = new byte[cipherTextWithIvBytes.Length - IvSize];
Buffer.BlockCopy(cipherTextWithIvBytes, IvSize, cipherText, 0, cipherText.Length - IvSize); Buffer.BlockCopy(cipherTextWithIvBytes, IvSize, cipherText, 0, cipherText.Length);
using (Aes aes = Aes.Create()) using (Aes aes = Aes.Create())
{ {
@ -94,9 +90,26 @@ namespace ServiceLib.Common
} }
} }
private static byte[] GetDefaultKey(string password) private static byte[] GetKey(string password)
{ {
using (Rfc2898DeriveBytes pbkdf2 = new Rfc2898DeriveBytes(password, Salt, Iterations, HashAlgorithmName.SHA256)) if (string.IsNullOrEmpty(password))
{
return GetDefaultKey();
}
else
{
byte[] key = Encoding.ASCII.GetBytes(password);
if (key.Length != KeySize / 8)
{
throw new ArgumentException($"Password bytes length must be {KeySize / 8} bytes.");
}
return key;
}
}
private static byte[] GetDefaultKey()
{
using (Rfc2898DeriveBytes pbkdf2 = new Rfc2898DeriveBytes(DefaultPassword, Salt, Iterations, HashAlgorithmName.SHA256))
{ {
return pbkdf2.GetBytes(KeySize / 8); return pbkdf2.GetBytes(KeySize / 8);
} }