DES非对称加密解密跨平台（C#，安卓，ios）
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#region 跨平台加解密（c# 安卓 ios） public static string sKey = "123456"; /// <summary> /// 解密 /// </summary> /// <param name="pToDecrypt">要解密的以Base64</param> /// <param name="sKey">密钥，且必须为8位</param> /// <returns>已解密的字符串</returns> public static string DesDecrypt(string pToDecrypt) { //转义特殊字符 pToDecrypt = pToDecrypt.Replace("-", "+"); pToDecrypt = pToDecrypt.Replace("_", "/"); pToDecrypt = pToDecrypt.Replace("~", "="); byte[] inputByteArray = Convert.FromBase64String(pToDecrypt); using (DESCryptoServiceProvider des = new DESCryptoServiceProvider()) { des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); System.IO.MemoryStream ms = new System.IO.MemoryStream(); using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write)) { cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); cs.Close(); } string str = Encoding.UTF8.GetString(ms.ToArray()); ms.Close(); return str; } } /// <summary> /// 对字符串进行DES加密 /// </summary> /// <param name="sourceString">待加密的字符串</param> /// <returns>加密后的BASE64编码的字符串</returns> public static string Encrypt(string sourceString) { byte[] btKey = Encoding.UTF8.GetBytes(sKey); byte[] btIV = Encoding.UTF8.GetBytes(sKey); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); using (MemoryStream ms = new MemoryStream()) { byte[] inData = Encoding.UTF8.GetBytes(sourceString); try { using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(btKey, btIV), CryptoStreamMode.Write)) { cs.Write(inData, 0, inData.Length); cs.FlushFinalBlock(); } return Convert.ToBase64String(ms.ToArray()); } catch { throw; } } } #endregion // 安卓--------------------------------------------------------------------------- // // 解密 //public static String DecryptDoNet(String message, String key) // throws Exception { // byte[] bytesrc = Base64.decode(message.getBytes(), Base64.DEFAULT); // 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); //} //// 加密 //public static String EncryptAsDoNet(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); // byte[] encryptbyte = cipher.doFinal(message.getBytes()); // return new String(Base64.encode(encryptbyte, Base64.DEFAULT)); //} /* //Ios --------------------------------------------------------------------------------------------------------------------\\ //加密 +(NSString*)decryptWithContent:(NSString*)content { char* keyChar = (char*)[@"加密key" UTF8String]; NSString* jm = [NSString stringWithCString: encryptWithKeyAndType([content UTF8String], kCCEncrypt, keyChar) encoding:NSUTF8StringEncoding]; return [NSString stringWithFormat:@"%@", jm]; } //解密 +(NSData*)encryptWithContent:(NSData*)content { NSString* contentStr = [[NSString alloc] initWithData:content encoding:NSUTF8StringEncoding]; if (contentStr == nil || [contentStr isEqualToString:@""]) { return nil; } contentStr= [contentStr substringWithRange:NSMakeRange(4, contentStr.length - 8)]; const char* contentChar =[contentStr UTF8String]; char* keyChar = (char*)[@"加密key" UTF8String]; const char* miChar; miChar = encryptWithKeyAndType(contentChar, kCCDecrypt, keyChar); if (miChar == nil) { miChar = ""; } NSString* zmStr = [NSString stringWithCString: miChar encoding: NSUTF8StringEncoding]; if (zmStr == nil) { zmStr =@""; } return [zmStr dataUsingEncoding:NSUTF8StringEncoding]; } static const char* encryptWithKeyAndType(const char * text, CCOperation encryptOperation, char * key) { NSString* textString =[[NSString alloc]initWithCString:text encoding:NSUTF8StringEncoding]; // NSLog(@"[[item.url description] UTF8String=%@",textString); const void* dataIn; size_t dataInLength; if (encryptOperation == kCCDecrypt)//传递过来的是decrypt 解码 { //解码 base64 NSData* decryptData = [GTMBase64 decodeData:[textString dataUsingEncoding: NSUTF8StringEncoding]];//转成utf-8并decode dataInLength = [decryptData length]; dataIn = [decryptData bytes]; } else //encrypt { NSData* encryptData = [textString dataUsingEncoding: NSUTF8StringEncoding]; dataInLength = [encryptData length]; dataIn = (const void*)[encryptData bytes]; } CCCryptorStatus ccStatus; uint8_t* dataOut = NULL; //可以理解位type/typedef 的缩写（有效的维护了代码，比如：一个人用int，一个人用long。最好用typedef来定义） size_t dataOutAvailable = 0; //size_t 是操作符sizeof返回的结果类型 size_t dataOutMoved = 0; dataOutAvailable = (dataInLength + kCCBlockSizeDES) & ~(kCCBlockSizeDES - 1); dataOut = malloc(dataOutAvailable* sizeof(uint8_t)); memset((void*)dataOut, 00, dataOutAvailable);//将已开辟内存空间buffer的首 1 个字节的值设为值 0 //NSString *initIv = @"12345678"; const void* vkey = key; const void* iv = (const void*) key; //[initIv UTF8String]; //CCCrypt函数 加密/解密 ccStatus = CCCrypt(encryptOperation,// 加密/解密 kCCAlgorithmDES,// 加密根据哪个标准（des，3des，aes。。。。） kCCOptionPKCS7Padding,// 选项分组密码算法(des:对每块分组加一次密 3DES：对每块分组加三个不同的密) vkey, //密钥 加密和解密的密钥必须一致 kCCKeySizeDES,// DES 密钥的大小（kCCKeySizeDES=8） iv, // 可选的初始矢量 dataIn, // 数据的存储单元 dataInLength,// 数据的大小 (void*)dataOut,// 用于返回数据 dataOutAvailable, &dataOutMoved); NSString* result = nil; if (encryptOperation == kCCDecrypt)//encryptOperation==1 解码 { //得到解密出来的data数据，改变为utf-8的字符串 result = [[NSString alloc] initWithData:[NSData dataWithBytes:(const void *)dataOut length:(NSUInteger)dataOutMoved] encoding:NSUTF8StringEncoding]; } else //encryptOperation==0 （加密过程中，把加好密的数据转成base64的） { //编码 base64 NSData* data = [NSData dataWithBytes: (const void *)dataOut length:(NSUInteger)dataOutMoved]; result = [GTMBase64 stringByEncodingData:data]; } return [result UTF8String]; } //Ios --------------------------------------------------------------------------------------------------------------------\\ static const char* encryptWithKeyAndType(const char * text, CCOperation encryptOperation, char * key) { NSString* textString =[[NSString alloc]initWithCString:text encoding:NSUTF8StringEncoding]; // NSLog(@"[[item.url description] UTF8String=%@",textString); const void* dataIn; size_t dataInLength; if (encryptOperation == kCCDecrypt)//传递过来的是decrypt 解码 { //解码 base64 NSData* decryptData = [GTMBase64 decodeData:[textString dataUsingEncoding: NSUTF8StringEncoding]];//转成utf-8并decode dataInLength = [decryptData length]; dataIn = [decryptData bytes]; } else //encrypt { NSData* encryptData = [textString dataUsingEncoding: NSUTF8StringEncoding]; dataInLength = [encryptData length]; dataIn = (const void*)[encryptData bytes]; } CCCryptorStatus ccStatus; uint8_t* dataOut = NULL; //可以理解位type/typedef 的缩写（有效的维护了代码，比如：一个人用int，一个人用long。最好用typedef来定义） size_t dataOutAvailable = 0; //size_t 是操作符sizeof返回的结果类型 size_t dataOutMoved = 0; dataOutAvailable = (dataInLength + kCCBlockSizeDES) & ~(kCCBlockSizeDES - 1); dataOut = malloc(dataOutAvailable* sizeof(uint8_t)); memset((void*)dataOut, 00, dataOutAvailable);//将已开辟内存空间buffer的首 1 个字节的值设为值 0 //NSString *initIv = @"12345678"; const void* vkey = key; const void* iv = (const void*) key; //[initIv UTF8String]; //CCCrypt函数 加密/解密 ccStatus = CCCrypt(encryptOperation,// 加密/解密 kCCAlgorithmDES,// 加密根据哪个标准（des，3des，aes。。。。） kCCOptionPKCS7Padding,// 选项分组密码算法(des:对每块分组加一次密 3DES：对每块分组加三个不同的密) vkey, //密钥 加密和解密的密钥必须一致 kCCKeySizeDES,// DES 密钥的大小（kCCKeySizeDES=8） iv, // 可选的初始矢量 dataIn, // 数据的存储单元 dataInLength,// 数据的大小 (void*)dataOut,// 用于返回数据 dataOutAvailable, &dataOutMoved); NSString* result = nil; if (encryptOperation == kCCDecrypt)//encryptOperation==1 解码 { //得到解密出来的data数据，改变为utf-8的字符串 result = [[NSString alloc] initWithData:[NSData dataWithBytes:(const void *)dataOut length:(NSUInteger)dataOutMoved] encoding:NSUTF8StringEncoding]; } else //encryptOperation==0 （加密过程中，把加好密的数据转成base64的） { //编码 base64 NSData* data = [NSData dataWithBytes: (const void *)dataOut length:(NSUInteger)dataOutMoved]; result = [GTMBase64 stringByEncodingData:data]; } return [result UTF8String]; } +(NSString*)encryptWithContent:(NSString*)content type:(CCOperation)type key:(NSString*)aKey { const char* contentChar =[content UTF8String]; char* keyChar = (char*)[aKey UTF8String]; const char* miChar; miChar = encryptWithKeyAndType(contentChar, type, keyChar); return [NSString stringWithCString:miChar encoding:NSUTF8StringEncoding]; } */
亲测可用：附带一份ios源码
https://files.cnblogs.com/files/xiang-wei/ios_des%E5%8A%A0%E5%AF%86.zip
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