C#编写DES加密、解密类
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2022-05-26 15:17:39
这个c#类封装的des加密解密,可以使用默认秘钥进行加密、解密,也可以自定义秘钥进行加密、解密,调用简单方便。
示例一:
using system;
usin...
这个c#类封装的des加密解密,可以使用默认秘钥进行加密、解密,也可以自定义秘钥进行加密、解密,调用简单方便。
示例一:
using system; using system.security.cryptography; using system.text; namespace dotnet.utilities { /// <summary> /// des加密/解密类。 /// </summary> public class desencrypt { public desencrypt() { } #region ========加密======== /// <summary> /// 加密 /// </summary> /// <param name="text"></param> /// <returns></returns> public static string encrypt(string text) { return encrypt(text,"sharejs.com"); } /// <summary> /// 加密数据 /// </summary> /// <param name="text"></param> /// <param name="skey"></param> /// <returns></returns> public static string encrypt(string text,string skey) { descryptoserviceprovider des = new descryptoserviceprovider(); byte[] inputbytearray; inputbytearray=encoding.default.getbytes(text); des.key = asciiencoding.ascii.getbytes(system.web.security.formsauthentication.hashpasswordforstoringinconfigfile(skey, "md5").substring(0, 8)); des.iv = asciiencoding.ascii.getbytes(system.web.security.formsauthentication.hashpasswordforstoringinconfigfile(skey, "md5").substring(0, 8)); system.io.memorystream ms=new system.io.memorystream(); cryptostream cs=new cryptostream(ms,des.createencryptor(),cryptostreammode.write); cs.write(inputbytearray,0,inputbytearray.length); cs.flushfinalblock(); stringbuilder ret=new stringbuilder(); foreach( byte b in ms.toarray()) { ret.appendformat("{0:x2}",b); } return ret.tostring(); } #endregion #region ========解密======== /// <summary> /// 解密 /// </summary> /// <param name="text"></param> /// <returns></returns> public static string decrypt(string text) { return decrypt(text,"sharejs.com"); } /// <summary> /// 解密数据 /// </summary> /// <param name="text"></param> /// <param name="skey"></param> /// <returns></returns> public static string decrypt(string text,string skey) { descryptoserviceprovider des = new descryptoserviceprovider(); int len; len=text.length/2; byte[] inputbytearray = new byte[len]; int x,i; for(x=0;x<len;x++) { i = convert.toint32(text.substring(x * 2, 2), 16); inputbytearray[x]=(byte)i; } des.key = asciiencoding.ascii.getbytes(system.web.security.formsauthentication.hashpasswordforstoringinconfigfile(skey, "md5").substring(0, 8)); des.iv = asciiencoding.ascii.getbytes(system.web.security.formsauthentication.hashpasswordforstoringinconfigfile(skey, "md5").substring(0, 8)); system.io.memorystream ms=new system.io.memorystream(); cryptostream cs=new cryptostream(ms,des.createdecryptor(),cryptostreammode.write); cs.write(inputbytearray,0,inputbytearray.length); cs.flushfinalblock(); return encoding.default.getstring(ms.toarray()); } #endregion } }
示例二:
///<summary><![cdata[加密解密帮助类]]></summary> public class help_encrypt { ///<summary><![cdata[字符串des加密函数]]></summary> ///<param name="str"><![cdata[被加密字符串 ]]></param> ///<param name="key"><![cdata[密钥 ]]></param> ///<returns><![cdata[加密后字符串]]></returns> public static string encode(string str, string key) { try { descryptoserviceprovider provider = new descryptoserviceprovider(); provider.key = encoding.ascii.getbytes(key.substring(0, 8)); provider.iv = encoding.ascii.getbytes(key.substring(0, 8)); byte[] bytes = encoding.getencoding("gb2312").getbytes(str); memorystream stream = new memorystream(); cryptostream stream2 = new cryptostream(stream, provider.createencryptor(), cryptostreammode.write); stream2.write(bytes, 0, bytes.length); stream2.flushfinalblock(); stringbuilder builder = new stringbuilder(); foreach (byte num in stream.toarray()) { builder.appendformat("{0:x2}", num); } stream.close(); return builder.tostring(); } catch (exception) { return "xxxx"; } } ///<summary><![cdata[字符串des解密函数]]></summary> ///<param name="str"><![cdata[被解密字符串 ]]></param> ///<param name="key"><![cdata[密钥 ]]></param> ///<returns><![cdata[解密后字符串]]></returns> public static string decode(string str, string key) { try { descryptoserviceprovider provider = new descryptoserviceprovider(); provider.key = encoding.ascii.getbytes(key.substring(0, 8)); provider.iv = encoding.ascii.getbytes(key.substring(0, 8)); byte[] buffer = new byte[str.length / 2]; for (int i = 0; i < (str.length / 2); i++) { int num2 = convert.toint32(str.substring(i * 2, 2), 0x10); buffer[i] = (byte)num2; } memorystream stream = new memorystream(); cryptostream stream2 = new cryptostream(stream, provider.createdecryptor(), cryptostreammode.write); stream2.write(buffer, 0, buffer.length); stream2.flushfinalblock(); stream.close(); return encoding.getencoding("gb2312").getstring(stream.toarray()); } catch (exception) { return ""; } } } javades加密解密类 package com.bgxt.messages; import java.io.unsupportedencodingexception; import java.security.*; import javax.crypto.cipher; import javax.crypto.secretkey; import javax.crypto.secretkeyfactory; import javax.crypto.spec.deskeyspec; import javax.crypto.spec.ivparameterspec; /** * 字符串工具集合 * @author liudong */ public class stringutils { private static final string password_crypt_key = xmlutil.getconfig().getpasswdkey().substring(0,8); //private final static string des = "des"; //private static final byte[] deskey; //解密数据 public static string decrypt(string message,string key) throws exception { byte[] bytesrc =converthexstring(message); cipher cipher = cipher.getinstance("des/cbc/pkcs5padding"); deskeyspec deskeyspec = new deskeyspec(key.getbytes("utf-8")); secretkeyfactory keyfactory = secretkeyfactory.getinstance("des"); secretkey secretkey = keyfactory.generatesecret(deskeyspec); ivparameterspec iv = new ivparameterspec(key.getbytes("utf-8")); cipher.init(cipher.decrypt_mode, secretkey, iv); byte[] retbyte = cipher.dofinal(bytesrc); return new string(retbyte); } public static byte[] encrypt(string message, string key) throws exception { cipher cipher = cipher.getinstance("des/cbc/pkcs5padding"); deskeyspec deskeyspec = new deskeyspec(key.getbytes("utf-8")); secretkeyfactory keyfactory = secretkeyfactory.getinstance("des"); secretkey secretkey = keyfactory.generatesecret(deskeyspec); ivparameterspec iv = new ivparameterspec(key.getbytes("utf-8")); cipher.init(cipher.encrypt_mode, secretkey, iv); return cipher.dofinal(message.getbytes("utf-8")); } public static string encrypt(string value){ string result=""; try{ value=java.net.urlencoder.encode(value, "utf-8"); result=tohexstring(encrypt(value, password_crypt_key)).touppercase(); }catch(exception ex){ ex.printstacktrace(); return ""; } return result; } public static byte[] converthexstring(string ss) { byte digest[] = new byte[ss.length() / 2]; for(int i = 0; i < digest.length; i++) { string bytestring = ss.substring(2 * i, 2 * i + 2); int bytevalue = integer.parseint(bytestring, 16); digest[i] = (byte)bytevalue; } return digest; } public static string tohexstring(byte b[]) { stringbuffer hexstring = new stringbuffer(); for (int i = 0; i < b.length; i++) { string plaintext = integer.tohexstring(0xff & b[i]); if (plaintext.length() < 2) plaintext = "0" + plaintext; hexstring.append(plaintext); } return hexstring.tostring(); } public static void main(string[] args) throws exception { string value="01"; system.out.println("加密数据:"+value); system.out.println("密码为:"+xmlutil.getconfig().getpasswdkey()); string a=encrypt( value); system.out.println("加密后的数据为:"+a); } }
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