// // DESUtil.m // shiku_im // // Created by 1 on 17/4/27. // Copyright © 2017年 Reese. All rights reserved. // #import "DESUtil.h" @interface DESUtil() +(NSString *)encryptDESStr:(NSString *)sText key:(NSString *)key andDesiv:(NSString *)ivDes; +(NSString *)decryptDESStr:(NSString *)sText key:(NSString *)key andDesiv:(NSString *)ivDes; @end @implementation DESUtil static Byte iv[] = {1,2,3,4,5,6,7,8}; //+(NSString *)encryptUseDES:(NSString *)plainText key:(NSString *)key //{ // if (!plainText || [plainText isEqualToString:@""]) { // return @""; // } // // NSString *ciphertext = nil; // // NSData *textData = [plainText dataUsingEncoding:NSUTF8StringEncoding]; // // NSUInteger dataLength = [textData length]; // // long isAdd = dataLength%8; // isAdd > 0 ? (isAdd = dataLength/8 + 1) : (isAdd = dataLength/8); // // unsigned char buffer[isAdd*8]; // memset(buffer, 0, isAdd*8*sizeof(char)); // // size_t bufferSize = dataLength + kCCBlockSizeDES; // size_t numBytesEncrypted = 0; // // CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, // kCCAlgorithmDES, // kCCOptionPKCS7Padding, // [key UTF8String], // kCCKeySizeDES, // iv, // [textData bytes], // dataLength, // buffer, // bufferSize, // &numBytesEncrypted); // // if (cryptStatus == kCCSuccess) { // // NSData *data = [NSData dataWithBytes:buffer length:(NSUInteger)numBytesEncrypted]; // // ciphertext = [data base64EncodedStringWithOptions:0]; // // } // // return ciphertext; // //} //+(NSString *)decryptUseDES:(NSString *)cipherText key:(NSString *)key //{ // if (!cipherText || [cipherText isEqualToString:@""]) { // return @""; // } // // NSString *plaintext = nil; // NSData *cipherdata = [[NSData alloc] initWithBase64EncodedString:cipherText options:NSDataBase64DecodingIgnoreUnknownCharacters]; // NSUInteger dataLength = [cipherdata length]; // // // size_t dataOutAvailable = 0; //size_t 是操作符sizeof返回的结果类型 // dataOutAvailable = (dataLength + kCCBlockSizeDES) & ~(kCCBlockSizeDES - 1); // // long isAdd = dataLength%8; // isAdd > 0 ? (isAdd = dataLength/8 + 1) : (isAdd = dataLength/8); // // unsigned char buffer[isAdd*8]; // memset(buffer, 0, isAdd*8*sizeof(char)); // size_t numBytesDecrypted = 0; // CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, // kCCAlgorithmDES, // kCCOptionPKCS7Padding, // [key UTF8String], // kCCKeySizeDES, // iv, // [cipherdata bytes], // [cipherdata length], // buffer, // dataOutAvailable, // &numBytesDecrypted); // if(cryptStatus == kCCSuccess) { // NSData *plaindata = [NSData dataWithBytes:buffer length:(NSUInteger)numBytesDecrypted]; // plaintext = [[NSString alloc]initWithData:plaindata encoding:NSUTF8StringEncoding]; // } // return plaintext; //} +(NSString *)encryptDESStr:(NSString *)sText key:(NSString *)key{ return [self encryptDESStr:sText key:key andDesiv:nil]; } +(NSString *)decryptDESStr:(NSString *)sText key:(NSString *)key{ return [self decryptDESStr:sText key:key andDesiv:nil]; } +(NSString *)encryptDESStr:(NSString *)sText key:(NSString *)key andDesiv:(NSString *)ivDes { sText = [NSString stringWithFormat:@"%@",sText]; if ((sText == nil || sText.length == 0) || (key == nil || key.length == 0)/* || (ivDes == nil || ivDes.length == 0)*/) { return @""; } NSData* encryptData = [sText dataUsingEncoding:NSUTF8StringEncoding]; size_t dataInLength = [encryptData length]; const void * dataIn = (const void *)[encryptData bytes]; CCCryptorStatus ccStatus; uint8_t *dataOut = NULL; size_t dataOutMoved = 0; size_t dataOutAvailable = (dataInLength + kCCBlockSizeDES) & ~(kCCBlockSizeDES - 1); dataOut = malloc( dataOutAvailable * sizeof(uint8_t)); memset((void *)dataOut, 0x0, dataOutAvailable);//将已开辟内存空间buffer的首个字节的值设为值0 // const void *iv = (const void *) [ivDes cStringUsingEncoding:NSASCIIStringEncoding]; //CCCrypt函数 加密/解密 ccStatus = CCCrypt(kCCEncrypt, //加密/解密 kCCAlgorithm3DES, //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) [key UTF8String], //密钥 加密和解密的密钥必须一致 kCCKeySize3DES, //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, //输出大小 &dataOutMoved); //偏移 //编码 base64 NSData *data = [NSData dataWithBytes:(const void *)dataOut length:(NSUInteger)dataOutMoved]; NSString *cipherStr = [data base64EncodedStringWithOptions:0]; free(dataOut); return cipherStr; } +(NSString *)decryptDESStr:(NSString *)sText key:(NSString *)key andDesiv:(NSString *)ivDes { if ((sText == nil || sText.length == 0) || (key == nil || key.length == 0)/* || (ivDes == nil || ivDes.length == 0)*/) { return @""; } const void *dataIn; size_t dataInLength; NSData *decryptData = [[NSData alloc] initWithBase64EncodedString:sText options:NSDataBase64DecodingIgnoreUnknownCharacters]; dataInLength = [decryptData length]; dataIn = [decryptData 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） 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, 0x0, dataOutAvailable);//将已开辟内存空间buffer的首 1 个字节的值设为值 0 // const void *ivDes = (const void *) [iv cStringUsingEncoding:NSASCIIStringEncoding]; //CCCrypt函数 加密/解密 ccStatus = CCCrypt(kCCDecrypt,// 加密/解密 kCCAlgorithm3DES,// 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) [key UTF8String], //密钥 加密和解密的密钥必须一致 kCCKeySize3DES,// 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 * plaintStr = [[NSString alloc] initWithData:[NSData dataWithBytes:(const void *)dataOut length:(NSUInteger)dataOutMoved] encoding:NSUTF8StringEncoding]; free(dataOut); return plaintStr; } //+(NSString *) encryptUseDES:(NSString *)clearText key:(NSString *)key //{ // NSString *ciphertext = nil; // NSData *textData = [clearText dataUsingEncoding:NSUTF8StringEncoding]; // NSUInteger dataLength = [textData length]; // unsigned long len = dataLength; // size_t bufferSize = dataLength + kCCBlockSizeAES128; // unsigned char buffer[len]; // size_t numBytesEncrypted = 0; // static Byte ffff[] = {1,2,3,4,5,6,7,8}; // // CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, // // kCCAlgorithmDES, // // kCCOptionPKCS7Padding | kCCOptionECBMode, // // [key UTF8String], // // kCCBlockSizeDES, // // NULL, // // [textData bytes], // // dataLength, // // buffer, // // bufferSize, // // &numBytesEncrypted); // // CCCryptorStatus cryptStatus2 = CCCrypt(kCCEncrypt,//模式 // kCCAlgorithmDES,//加密方式 // kCCOptionPKCS7Padding | kCCOptionECBMode,//填充算法 // [@"12345678" UTF8String],//密匙字符串 // kCCKeySizeDES,//加密位数 // ffff,//可选初始化向量 // [textData bytes],//加密数据 // dataLength,//数据长 // buffer,//输出 // bufferSize,//dataOutAvailable // &numBytesEncrypted);//*dataOutMoved // // if (cryptStatus2 == kCCSuccess) { // NSLog(@"DES加密成功"); // // NSData *data = [NSData dataWithBytes:buffer length:(NSUInteger)numBytesEncrypted]; // NSString * base = [data base64EncodedStringWithOptions:0]; // ciphertext = [self stringWithHexBytes2:data]; // // }else{ // NSLog(@"DES加密失败"); // } // NSLog(@"%@",[self decryptUseDES:ciphertext key:key]); //// free(buffer); // return ciphertext; //} // //+(NSString *) decryptUseDES:(NSString *)plainText key:(NSString *)key //{ // NSString *cleartext = nil; // NSData *textData = [self parseHexToByteArray:plainText]; // NSUInteger dataLength = [textData length]; // unsigned long len = dataLength; // size_t bufferSize = dataLength + kCCBlockSizeAES128; // unsigned char buffer[len]; // memset(buffer, 0, sizeof(char)); // size_t numBytesEncrypted = 0; // // // CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, // kCCAlgorithmDES, // kCCOptionPKCS7Padding, // [key UTF8String], // kCCKeySizeDES, // NULL, // [textData bytes], // dataLength, // buffer, // bufferSize, // &numBytesEncrypted); // if (cryptStatus == kCCSuccess) { // NSLog(@"DES解密成功"); // // NSData *data = [NSData dataWithBytes:buffer length:(NSUInteger)numBytesEncrypted]; // cleartext = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; // }else{ // NSLog(@"DES解密失败"); // } // //// free(buffer); // return cleartext; //} /* nsdata转成16进制字符串 */ + (NSString*)stringWithHexBytes2:(NSData *)sender { static const char hexdigits[] = "0123456789ABCDEF"; const size_t numBytes = [sender length]; const unsigned char* bytes = [sender bytes]; char *strbuf = (char *)malloc(numBytes * 2 + 1); char *hex = strbuf; NSString *hexBytes = nil; for (int i = 0; i> 4) & 0xF]; *hex++ = hexdigits[(c ) & 0xF]; } *hex = 0; hexBytes = [NSString stringWithUTF8String:strbuf]; // free(strbuf); return hexBytes; } /* 将16进制数据转化成NSData 数组 */ +(NSData*) parseHexToByteArray:(NSString*) hexString { int j=0; Byte bytes[hexString.length]; for(int i=0;i<[hexString length];i++) { int int_ch; /// 两位16进制数转化后的10进制数 unichar hex_char1 = [hexString characterAtIndex:i]; ////两位16进制数中的第一位(高位*16) int int_ch1; if(hex_char1 >= '0' && hex_char1 <='9') int_ch1 = (hex_char1-48)*16; //// 0 的Ascll - 48 else if(hex_char1 >= 'A' && hex_char1 <='F') int_ch1 = (hex_char1-55)*16; //// A 的Ascll - 65 else int_ch1 = (hex_char1-87)*16; //// a 的Ascll - 97 i++; unichar hex_char2 = [hexString characterAtIndex:i]; ///两位16进制数中的第二位(低位) int int_ch2; if(hex_char2 >= '0' && hex_char2 <='9') int_ch2 = (hex_char2-48); //// 0 的Ascll - 48 else if(hex_char2 >= 'A' && hex_char1 <='F') int_ch2 = hex_char2-55; //// A 的Ascll - 65 else int_ch2 = hex_char2-87; //// a 的Ascll - 97 int_ch = int_ch1+int_ch2; bytes[j] = int_ch; ///将转化后的数放入Byte数组里 j++; } NSData *newData = [[NSData alloc] initWithBytes:bytes length:hexString.length/2]; return newData; } /* Des加密 Data */ +(NSData *)encryptDESData:(NSData *)data key:(NSData *)keyData { NSString *key = [[NSString alloc] initWithData:keyData encoding:NSUTF8StringEncoding]; size_t dataInLength = [data length]; const void * dataIn = (const void *)[data bytes]; CCCryptorStatus ccStatus; uint8_t *dataOut = NULL; size_t dataOutMoved = 0; size_t dataOutAvailable = (dataInLength + kCCBlockSizeDES) & ~(kCCBlockSizeDES - 1); dataOut = malloc( dataOutAvailable * sizeof(uint8_t)); memset((void *)dataOut, 0x0, dataOutAvailable);//将已开辟内存空间buffer的首个字节的值设为值0 // const void *iv = (const void *) [ivDes cStringUsingEncoding:NSASCIIStringEncoding]; //CCCrypt函数 加密/解密 ccStatus = CCCrypt(kCCEncrypt, //加密/解密 kCCAlgorithm3DES, //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) [key UTF8String], //密钥 加密和解密的密钥必须一致 kCCKeySize3DES, //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, //输出大小 &dataOutMoved); //偏移 //编码 base64 NSData *data1 = [NSData dataWithBytes:(const void *)dataOut length:(NSUInteger)dataOutMoved]; free(dataOut); return data1; } /* Des解密 Data */ +(NSData *)decryptDESData:(NSData *)data key:(NSData *)keyData { NSString *key = [[NSString alloc] initWithData:keyData encoding:NSUTF8StringEncoding]; const void *dataIn; size_t dataInLength; dataInLength = [data length]; dataIn = [data 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） 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, 0x0, dataOutAvailable);//将已开辟内存空间buffer的首 1 个字节的值设为值 0 // const void *ivDes = (const void *) [iv cStringUsingEncoding:NSASCIIStringEncoding]; //CCCrypt函数 加密/解密 ccStatus = CCCrypt(kCCDecrypt,// 加密/解密 kCCAlgorithm3DES,// 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) [key UTF8String], //密钥 加密和解密的密钥必须一致 kCCKeySize3DES,// 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 * plaintStr = [[NSString alloc] initWithData:[NSData dataWithBytes:(const void *)dataOut length:(NSUInteger)dataOutMoved] encoding:NSUTF8StringEncoding]; free(dataOut); return [NSData dataWithBytes:(const void *)dataOut length:(NSUInteger)dataOutMoved]; } @end