C#计算字符串哈希值(MD5、SHA)的方法小结
本篇章节讲解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 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 /// <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 /// <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 /// <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 /// <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 /// <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 /// <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 /// <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 /// <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: 复制代码 代码如下: using HashTools; 然后在Main函数中添加下列代码: 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",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。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |