88 lines
2.5 KiB
C#
88 lines
2.5 KiB
C#
using System;
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using System.Security.Cryptography;
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using System.Text;
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namespace BF
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{
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public class AesEncrypt
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{
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const int PASSWORD_LENGTH = 32; //密钥长度16，24，32
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static byte[] IV = new byte[]
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{
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0x00, 0x01, 0x02, 0x03,
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0x04, 0x05, 0x06, 0x07,
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0x08, 0x09, 0x0A, 0x0B,
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0x0C, 0x0D, 0x0E, 0x0F
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}; //只能16字节
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static AesCryptoServiceProvider aesProvider;
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static void Init(string key, bool fromBase64 = false)
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{
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if (null == aesProvider)
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{
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aesProvider = new AesCryptoServiceProvider
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{
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// KeySize = PASSWORD_LENGTH,
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IV = IV,
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Mode = CipherMode.ECB,
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Padding = PaddingMode.PKCS7,
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};
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}
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if (!string.IsNullOrEmpty(key))
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{
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if (fromBase64)
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key = Encoding.UTF8.GetString(Convert.FromBase64String(key));
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key = GenPassWord(key);
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var keyBytes = Encoding.UTF8.GetBytes(key);
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aesProvider.Key = keyBytes;
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}
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}
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/// <summary>
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/// 纯aes加密
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/// </summary>
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static public byte[] Encrypt(byte[] buffer, string key)
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{
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Init(key);
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var encrytor = aesProvider.CreateEncryptor();
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byte[] finalArray = encrytor.TransformFinalBlock(buffer, 0, buffer.Length);
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encrytor.Dispose();
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return finalArray;
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}
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/// <summary>
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/// 纯aes解密
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/// </summary>
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static public byte[] Decrypt(byte[] buffer, string key)
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{
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Init(key);
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var decrytor = aesProvider.CreateDecryptor();
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byte[] finalArray = decrytor.TransformFinalBlock(buffer, 0, buffer.Length);
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decrytor.Dispose();
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return finalArray;
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}
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static string GenPassWord(string key)
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{
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int len = key.Length;
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if (len < PASSWORD_LENGTH)
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{
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key = key.PadRight(PASSWORD_LENGTH, 'D');
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}
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else if (len > PASSWORD_LENGTH)
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{
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key = key.Substring(0, len);
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}
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return key;
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}
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static public void Clear()
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{
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if (null != aesProvider)
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{
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aesProvider.Clear();
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}
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}
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}
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} |