應網友之邀為大家提供一下WebQQ的MD5加密算法，因為MD5是WebQQ模擬登錄過程中最難的部分，所以在這里不能不提及。本文只能提供C#的實現方法，其他語言版本可以參照C#作適當的修改便可。要操作MD5，C#中自帶一個MD5類可供選擇，相當方便。如果要自己寫算法實現MD5也未曾不可，只是放着現成的類不用太浪費了。
首先引用空間：
using System.Security.Cryptography;
先說說WebQQ MD5加密的方式，公式是這樣的：
md5(md5(hexchar2bin(md5(p)) + uin) + verify.toUpperCase());
verify是驗證碼，uin就是那段\x0的代碼，p是密碼
至於為什么是這樣，作為菜鳥，我也說不清，懵里懵懂的給大家展示一下~！~只是用firebug分析到的Js里面的算法大致就是這個意思。其中這里最關鍵的函數，就是hexchar2bin了.我們先來羅列一下基礎的MD5函數吧，其實是MD5的標准算法，直接貼在下面了，將普通文本轉換成MD5。
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/// <summary> /// 一次md5加密 ///http://www.cnblogs.com/uu102 /// </summary> /// <param name="md5_str">需要加密的文本</param> /// <returns></returns> public static string MD5_Encrypt(string md5_str) { System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5CryptoServiceProvider.Create(); byte[] bytes = System.Text.Encoding.ASCII.GetBytes(md5_str); byte[] bytes1 = md5.ComputeHash(bytes); System.Text.StringBuilder stringBuilder = new StringBuilder(); foreach (var item in bytes1) { stringBuilder.Append(item.ToString("x").PadLeft(2, '0')); } return stringBuilder.ToString().ToUpper(); }
再重載一次這個方法，以便能將字節數組也能轉換成我們需要的MD5字符串
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/// <summary> /// 將字節流加密 /// </summary> /// <param name="md5_bytes">需要加密的字節流</param> /// <returns></returns> private static string MD5_Encrypt(byte[] md5_bytes) { System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5CryptoServiceProvider.Create(); byte[] bytes1 = md5.ComputeHash(md5_bytes); System.Text.StringBuilder stringBuilder = new StringBuilder(); foreach (var item in bytes1) { stringBuilder.Append(item.ToString("x").PadLeft(2, '0')); } return stringBuilder.ToString().ToUpper(); }
接着，再上一個將字符串轉換為MD5加密數組的函數
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/// <summary> /// 獲取文本的md5字節流 /// </summary> /// <param name="md5_str">需要加密成Md5d的文本</param> /// <returns></returns> private static byte[] MD5_GetBytes(string md5_str) { System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5CryptoServiceProvider.Create(); byte[] bytes = System.Text.Encoding.ASCII.GetBytes(md5_str); return md5.ComputeHash(bytes); }
接下來
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/// <summary> /// 加密成md5字節流之后轉換成文本 /// </summary> /// <param name="md5_str"></param> /// <returns></returns> private static string Encrypt_1(string md5_str) { System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5CryptoServiceProvider.Create(); byte[] bytes = System.Text.Encoding.ASCII.GetBytes(md5_str); bytes = md5.ComputeHash(bytes); System.Text.StringBuilder stringBuilder = new StringBuilder(); foreach (var item in bytes) { stringBuilder.Append(@"\x"); stringBuilder.Append(item.ToString("x2")); } return stringBuilder.ToString(); }
操作字節流
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public class ByteBuffer { private byte[] _buffer; /// <summary> /// 獲取同后備存儲區連接的基礎流 /// </summary> public Stream BaseStream; /// <summary> /// 構造函數 /// </summary> public ByteBuffer() { this.BaseStream = new MemoryStream(); this._buffer = new byte[0x10]; } /// <summary> /// 設置當前流中的位置 /// </summary> /// <param name="offset">相對於origin參數字節偏移量</param> /// <param name="origin">System.IO.SeekOrigin類型值,指示用於獲取新位置的參考點</param> /// <returns></returns> public virtual long Seek(int offset, SeekOrigin origin) { return this.BaseStream.Seek((long)offset, origin); } /// <summary> /// 檢測是否還有可用字節 /// </summary> /// <returns></returns> public bool Peek() { return BaseStream.Position >= BaseStream.Length ? false : true; } /// <summary> /// 將整個流內容寫入字節數組，而與 Position 屬性無關。 /// </summary> /// <returns></returns> public byte[] ToByteArray() { long org = BaseStream.Position; BaseStream.Position = 0; byte[] ret = new byte[BaseStream.Length]; BaseStream.Read(ret, 0, ret.Length); BaseStream.Position = org; return ret; } #region "寫流方法" /// <summary> /// 壓入一個布爾值,並將流中當前位置提升1 /// </summary> /// <param name="value"></param> public void Put(bool value) { this._buffer[0] = value ? (byte)1 : (byte)0; this.BaseStream.Write(_buffer, 0, 1); } /// <summary> /// 壓入一個Byte,並將流中當前位置提升1 /// </summary> /// <param name="value"></param> public void Put(Byte value) { this.BaseStream.WriteByte(value); } /// <summary> /// 壓入Byte數組,並將流中當前位置提升數組長度 /// </summary> /// <param name="value">字節數組</param> public void Put(Byte[] value) { if (value == null) { throw new ArgumentNullException("value"); } this.BaseStream.Write(value, 0, value.Length); } /// <summary> /// Puts the int. /// </summary> /// <param name="value">The value.</param> public void PutInt(int value) { PutInt((uint)value); } /// <summary> /// 壓入一個int,並將流中當前位置提升4 /// </summary> /// <param name="value"></param> public void PutInt(uint value) { this._buffer[0] = (byte)(value >> 0x18); this._buffer[1] = (byte)(value >> 0x10); this._buffer[2] = (byte)(value >> 8); this._buffer[3] = (byte)value; this.BaseStream.Write(this._buffer, 0, 4); } /// <summary> /// Puts the int. /// </summary> /// <param name="index">The index.</param> /// <param name="value">The value.</param> public void PutInt(int index, uint value) { int pos = (int)this.BaseStream.Position; Seek(index, SeekOrigin.Begin); PutInt(value); Seek(pos, SeekOrigin.Begin); } #endregion #region "讀流方法" /// <summary> /// 讀取Byte值,並將流中當前位置提升1 /// </summary> /// <returns></returns> public byte Get() { return (byte)BaseStream.ReadByte(); } #endregion }
最后一個函數
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public static string MD5_QQ_2_Encrypt(long uin, string password, string verifyCode) { ByteBuffer buffer= new ByteBuffer(); buffer.Put(MD5_GetBytes(password)); //buffer.Put(Encoding.UTF8.GetBytes(password)); buffer.PutInt(0); buffer.PutInt((uint)uin); byte[] bytes = buffer.ToByteArray(); string md5_1 = MD5_Encrypt(bytes);//將混合后的字節流進行一次md5加密 string result= MD5_Encrypt(md5_1 + verifyCode.ToUpper());//再用加密后的結果與大寫的驗證碼一起加密一次 return result; }
大家湊合着看吧。對於這些代碼實在是沒什么話說，只好讓各位自行研究了。代碼絕對可用。本人博客每天都有原創更新，歡迎大家繼續關注！