本文实例讲述了C#计算字符串哈希值(MD5、SHA)的方法。分享给大家供大家参考。具体如下:
一、关于本文
本文中是一个类库,包括下面几个函数:
① 计算32位MD5码(大小写):Hash_MD5_32
② 计算16位MD5码(大小写):Hash_MD5_16
③ 计算32位2重MD5码(大小写):Hash_2_MD5_32
④ 计算16位2重MD5码(大小写):Hash_2_MD5_16
⑤ 计算SHA-1码(大小写):Hash_SHA_1
⑥ 计算SHA-256码(大小写):Hash_SHA_256
⑦ 计算SHA-384码(大小写):Hash_SHA_384
⑧ 计算SHA-512码(大小写):Hash_SHA_512
编译后被打包成文件HashTools.dll,其他程序可以在添加引用后对这些函数进行调用
二、类库中各函数代码
1. 类库结构
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace HashTools { public class HashHelper { //各个函数 } } |
2. 计算32位MD5码(大小写):Hash_MD5_32
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/// <summary> /// 计算32位MD5码 /// </summary> /// <param name="word">字符串</param> /// <param name="toUpper">返回哈希值格式 true:英文大写,false:英文小写</param> /// <returns></returns> public static string Hash_MD5_32( string word, bool toUpper = true ) { try { System.Security.Cryptography.MD5CryptoServiceProvider MD5CSP = new System.Security.Cryptography.MD5CryptoServiceProvider(); byte [] bytValue = System.Text.Encoding.UTF8.GetBytes(word); byte [] bytHash = MD5CSP.ComputeHash(bytValue); MD5CSP.Clear(); //根据计算得到的Hash码翻译为MD5码 string sHash = "" , sTemp = "" ; for ( int counter = 0; counter < bytHash.Count(); counter++) { long i = bytHash[counter] / 16; if (i > 9) { sTemp = (( char )(i - 10 + 0x41)).ToString(); } else { sTemp = (( char )(i + 0x30)).ToString(); } i = bytHash[counter] % 16; if (i > 9) { sTemp += (( char )(i - 10 + 0x41)).ToString(); } else { sTemp += (( char )(i + 0x30)).ToString(); } sHash += sTemp; } //根据大小写规则决定返回的字符串 return toUpper ? sHash : sHash.ToLower(); } catch (Exception ex) { throw new Exception(ex.Message); } } |
3. 计算16位MD5码(大小写):Hash_MD5_16
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/// <summary> /// 计算16位MD5码 /// </summary> /// <param name="word">字符串</param> /// <param name="toUpper">返回哈希值格式 true:英文大写,false:英文小写</param> /// <returns></returns> public static string Hash_MD5_16( string word, bool toUpper = true ) { try { string sHash = Hash_MD5_32(word).Substring(8, 16); return toUpper ? sHash : sHash.ToLower(); } catch (Exception ex) { throw new Exception(ex.Message); } } |
4. 计算32位2重MD5码(大小写):Hash_2_MD5_32
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/// <summary> /// 计算32位2重MD5码 /// </summary> /// <param name="word">字符串</param> /// <param name="toUpper">返回哈希值格式 true:英文大写,false:英文小写</param> /// <returns></returns> public static string Hash_2_MD5_32( string word, bool toUpper = true ) { try { System.Security.Cryptography.MD5CryptoServiceProvider MD5CSP = new System.Security.Cryptography.MD5CryptoServiceProvider(); byte [] bytValue = System.Text.Encoding.UTF8.GetBytes(word); byte [] bytHash = MD5CSP.ComputeHash(bytValue); //根据计算得到的Hash码翻译为MD5码 string sHash = "" , sTemp = "" ; for ( int counter = 0; counter < bytHash.Count(); counter++) { long i = bytHash[counter] / 16; if (i > 9) { sTemp = (( char )(i - 10 + 0x41)).ToString(); } else { sTemp = (( char )(i + 0x30)).ToString(); } i = bytHash[counter] % 16; if (i > 9) { sTemp += (( char )(i - 10 + 0x41)).ToString(); } else { sTemp += (( char )(i + 0x30)).ToString(); } sHash += sTemp; } bytValue = System.Text.Encoding.UTF8.GetBytes(sHash); bytHash = MD5CSP.ComputeHash(bytValue); MD5CSP.Clear(); sHash = "" ; //根据计算得到的Hash码翻译为MD5码 for ( int counter = 0; counter < bytHash.Count(); counter++) { long i = bytHash[counter] / 16; if (i > 9) { sTemp = (( char )(i - 10 + 0x41)).ToString(); } else { sTemp = (( char )(i + 0x30)).ToString(); } i = bytHash[counter] % 16; if (i > 9) { sTemp += (( char )(i - 10 + 0x41)).ToString(); } else { sTemp += (( char )(i + 0x30)).ToString(); } sHash += sTemp; } //根据大小写规则决定返回的字符串 return toUpper ? sHash : sHash.ToLower(); } catch (Exception ex) { throw new Exception(ex.Message); } } |
5. 计算16位2重MD5码(大小写):Hash_2_MD5_16
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/// <summary> /// 计算16位2重MD5码 /// </summary> /// <param name="word">字符串</param> /// <param name="toUpper">返回哈希值格式 true:英文大写,false:英文小写</param> /// <returns></returns> public static string Hash_2_MD5_16( string word, bool toUpper = true ) { try { System.Security.Cryptography.MD5CryptoServiceProvider MD5CSP = new System.Security.Cryptography.MD5CryptoServiceProvider(); byte [] bytValue = System.Text.Encoding.UTF8.GetBytes(word); byte [] bytHash = MD5CSP.ComputeHash(bytValue); //根据计算得到的Hash码翻译为MD5码 string sHash = "" , sTemp = "" ; for ( int counter = 0; counter < bytHash.Count(); counter++) { long i = bytHash[counter] / 16; if (i > 9) { sTemp = (( char )(i - 10 + 0x41)).ToString(); } else { sTemp = (( char )(i + 0x30)).ToString(); } i = bytHash[counter] % 16; if (i > 9) { sTemp += (( char )(i - 10 + 0x41)).ToString(); } else { sTemp += (( char )(i + 0x30)).ToString(); } sHash += sTemp; } sHash = sHash.Substring(8, 16); bytValue = System.Text.Encoding.UTF8.GetBytes(sHash); bytHash = MD5CSP.ComputeHash(bytValue); MD5CSP.Clear(); sHash = "" ; //根据计算得到的Hash码翻译为MD5码 for ( int counter = 0; counter < bytHash.Count(); counter++) { long i = bytHash[counter] / 16; if (i > 9) { sTemp = (( char )(i - 10 + 0x41)).ToString(); } else { sTemp = (( char )(i + 0x30)).ToString(); } i = bytHash[counter] % 16; if (i > 9) { sTemp += (( char )(i - 10 + 0x41)).ToString(); } else { sTemp += (( char )(i + 0x30)).ToString(); } sHash += sTemp; } sHash = sHash.Substring(8, 16); //根据大小写规则决定返回的字符串 return toUpper ? sHash : sHash.ToLower(); } catch (Exception ex) { throw new Exception(ex.Message); } } |
6. 计算SHA-1码(大小写):Hash_SHA_1
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/// <summary> /// 计算SHA-1码 /// </summary> /// <param name="word">字符串</param> /// <param name="toUpper">返回哈希值格式 true:英文大写,false:英文小写</param> /// <returns></returns> public static string Hash_SHA_1( string word, bool toUpper = true ) { try { System.Security.Cryptography.SHA1CryptoServiceProvider SHA1CSP = new System.Security.Cryptography.SHA1CryptoServiceProvider(); byte [] bytValue = System.Text.Encoding.UTF8.GetBytes(word); byte [] bytHash = SHA1CSP.ComputeHash(bytValue); SHA1CSP.Clear(); //根据计算得到的Hash码翻译为SHA-1码 string sHash = "" , sTemp = "" ; for ( int counter = 0; counter < bytHash.Count(); counter++) { long i = bytHash[counter] / 16; if (i > 9) { sTemp = (( char )(i - 10 + 0x41)).ToString(); } else { sTemp = (( char )(i + 0x30)).ToString(); } i = bytHash[counter] % 16; if (i > 9) { sTemp += (( char )(i - 10 + 0x41)).ToString(); } else { sTemp += (( char )(i + 0x30)).ToString(); } sHash += sTemp; } //根据大小写规则决定返回的字符串 return toUpper ? sHash : sHash.ToLower(); } catch (Exception ex) { throw new Exception(ex.Message); } } |
7. 计算SHA-256码(大小写):Hash_SHA_256
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/// <summary> /// 计算SHA-256码 /// </summary> /// <param name="word">字符串</param> /// <param name="toUpper">返回哈希值格式 true:英文大写,false:英文小写</param> /// <returns></returns> public static string Hash_SHA_256( string word, bool toUpper = true ) { try { System.Security.Cryptography.SHA256CryptoServiceProvider SHA256CSP = new System.Security.Cryptography.SHA256CryptoServiceProvider(); byte [] bytValue = System.Text.Encoding.UTF8.GetBytes(word); byte [] bytHash = SHA256CSP.ComputeHash(bytValue); SHA256CSP.Clear(); //根据计算得到的Hash码翻译为SHA-1码 string sHash = "" , sTemp = "" ; for ( int counter = 0; counter < bytHash.Count(); counter++) { long i = bytHash[counter] / 16; if (i > 9) { sTemp = (( char )(i - 10 + 0x41)).ToString(); } else { sTemp = (( char )(i + 0x30)).ToString(); } i = bytHash[counter] % 16; if (i > 9) { sTemp += (( char )(i - 10 + 0x41)).ToString(); } else { sTemp += (( char )(i + 0x30)).ToString(); } sHash += sTemp; } //根据大小写规则决定返回的字符串 return toUpper ? sHash : sHash.ToLower(); } catch (Exception ex) { throw new Exception(ex.Message); } } |
8. 计算SHA-384码(大小写):Hash_SHA_384
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/// <summary> /// 计算SHA-384码 /// </summary> /// <param name="word">字符串</param> /// <param name="toUpper">返回哈希值格式 true:英文大写,false:英文小写</param> /// <returns></returns> public static string Hash_SHA_384( string word, bool toUpper = true ) { try { System.Security.Cryptography.SHA384CryptoServiceProvider SHA384CSP = new System.Security.Cryptography.SHA384CryptoServiceProvider(); byte [] bytValue = System.Text.Encoding.UTF8.GetBytes(word); byte [] bytHash = SHA384CSP.ComputeHash(bytValue); SHA384CSP.Clear(); //根据计算得到的Hash码翻译为SHA-1码 string sHash = "" , sTemp = "" ; for ( int counter = 0; counter < bytHash.Count(); counter++) { long i = bytHash[counter] / 16; if (i > 9) { sTemp = (( char )(i - 10 + 0x41)).ToString(); } else { sTemp = (( char )(i + 0x30)).ToString(); } i = bytHash[counter] % 16; if (i > 9) { sTemp += (( char )(i - 10 + 0x41)).ToString(); } else { sTemp += (( char )(i + 0x30)).ToString(); } sHash += sTemp; } //根据大小写规则决定返回的字符串 return toUpper ? sHash : sHash.ToLower(); } catch (Exception ex) { throw new Exception(ex.Message); } } |
9. 计算SHA-512码(大小写):Hash_SHA_512
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/// <summary> /// 计算SHA-512码 /// </summary> /// <param name="word">字符串</param> /// <param name="toUpper">返回哈希值格式 true:英文大写,false:英文小写</param> /// <returns></returns> public static string Hash_SHA_512( string word, bool toUpper = true ) { try { System.Security.Cryptography.SHA512CryptoServiceProvider SHA512CSP = new System.Security.Cryptography.SHA512CryptoServiceProvider(); byte [] bytValue = System.Text.Encoding.UTF8.GetBytes(word); byte [] bytHash = SHA512CSP.ComputeHash(bytValue); SHA512CSP.Clear(); //根据计算得到的Hash码翻译为SHA-1码 string sHash = "" , sTemp = "" ; for ( int counter = 0; counter < bytHash.Count(); counter++) { long i = bytHash[counter] / 16; if (i > 9) { sTemp = (( char )(i - 10 + 0x41)).ToString(); } else { sTemp = (( char )(i + 0x30)).ToString(); } i = bytHash[counter] % 16; if (i > 9) { sTemp += (( char )(i - 10 + 0x41)).ToString(); } else { sTemp += (( char )(i + 0x30)).ToString(); } sHash += sTemp; } //根据大小写规则决定返回的字符串 return toUpper ? sHash : sHash.ToLower(); } catch (Exception ex) { throw new Exception(ex.Message); } } |
三、函数调用
建立项目ComputeHash,添加对HashTools.dll库的引用。并添加代码:
然后在Main函数中添加下列代码:
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static void Main( string [] args) { Console.WriteLine( "MD5 of \"abc\"" ); Console.WriteLine( "MD5_32(Upper): {0}" , HashHelper.Hash_MD5_32( "abc" )); Console.WriteLine( "MD5_32(Lower): {0}" , HashHelper.Hash_MD5_32( "abc" , false )); Console.WriteLine( "MD5_16(Upper): {0}" , HashHelper.Hash_MD5_16( "abc" )); Console.WriteLine( "MD5_16(Lower): {0}" , HashHelper.Hash_MD5_16( "abc" , false )); Console.WriteLine( "2_MD5_32(Upper): {0}" , HashHelper.Hash_2_MD5_32( "abc" )); Console.WriteLine( "2_MD5_32(Lower): {0}" , HashHelper.Hash_2_MD5_32( "abc" , false )); Console.WriteLine( "2_MD5_32(Upper): {0}" , HashHelper.Hash_2_MD5_16( "abc" )); Console.WriteLine( "2_MD5_32(Lower): {0}" , HashHelper.Hash_2_MD5_16( "abc" , false )); Console.WriteLine( "SHA of \"abc\"" ); Console.WriteLine( "SHA-1(Upper): {0}" , HashHelper.Hash_SHA_1( "abc" )); Console.WriteLine( "SHA-1(Lower): {0}" , HashHelper.Hash_SHA_1( "abc" , false )); Console.WriteLine( "SHA-256(Upper): {0}" , HashHelper.Hash_SHA_256( "abc" )); Console.WriteLine( "SHA-256(Lower): {0}" , HashHelper.Hash_SHA_256( "abc" , false )); Console.WriteLine( "SHA-384(Upper): {0}" , HashHelper.Hash_SHA_384( "abc" )); Console.WriteLine( "SHA-384(Lower): {0}" , HashHelper.Hash_SHA_384( "abc" , false )); Console.WriteLine( "SHA-512(Upper): {0}" , HashHelper.Hash_SHA_512( "abc" )); Console.WriteLine( "SHA-512(Lower): {0}" , HashHelper.Hash_SHA_512( "abc" , false )); Console.ReadLine(); } |
运行结果如下:
希望本文所述对大家的C#程序设计有所帮助。