#import <CommonCrypto/CommonDigest.h>
#import <CommonCrypto/CommonCryptor.h>
#import <Security/Security.h>
#import "GTMBase64.h"

//密匙 key
#define gkey            @"Kyle_Chu"
//偏移量
#define gIv             @"jukai"

//字符串加密
-(NSString *)doEncryptStr:(NSString *)originalStr{//把string 转NSDataNSData* data = [originalStr dataUsingEncoding:NSUTF8StringEncoding];//lengthsize_t plainTextBufferSize = [data length];const void *vplainText = (const void *)[data bytes];CCCryptorStatus ccStatus;uint8_t *bufferPtr = NULL;size_t bufferPtrSize = 0;size_t movedBytes = 0;bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));memset((void *)bufferPtr, 0x0, bufferPtrSize);const void *vkey = (const void *) [gkey UTF8String];//偏移量const void *vinitVec = (const void *) [gIv UTF8String];//配置CCCryptccStatus = CCCrypt(kCCEncrypt,kCCAlgorithm3DES, //3DESkCCOptionECBMode|kCCOptionPKCS7Padding, //设置模式vkey,    //key
                       kCCKeySize3DES,vinitVec,     //偏移量，这里不用，设置为nil;不用的话，必须为nil,不可以为@“”
                       vplainText,plainTextBufferSize,(void *)bufferPtr,bufferPtrSize,&movedBytes);NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes];NSString *result = [GTMBase64 stringByEncodingData:myData];return result;
}

//字符串解密
-(NSString*)doDecEncryptStr:(NSString *)encryptStr{NSData *encryptData = [GTMBase64 decodeData:[encryptStr dataUsingEncoding:NSUTF8StringEncoding]];size_t plainTextBufferSize = [encryptData length];const void *vplainText = [encryptData bytes];CCCryptorStatus ccStatus;uint8_t *bufferPtr = NULL;size_t bufferPtrSize = 0;size_t movedBytes = 0;bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));memset((void *)bufferPtr, 0x0, bufferPtrSize);const void *vkey = (const void *) [gkey UTF8String];const void *vinitVec = (const void *) [gIv UTF8String];ccStatus = CCCrypt(kCCDecrypt,kCCAlgorithm3DES,kCCOptionPKCS7Padding|kCCOptionECBMode,vkey,kCCKeySize3DES,vinitVec,vplainText,plainTextBufferSize,(void *)bufferPtr,bufferPtrSize,&movedBytes);NSString *result = [[NSString alloc] initWithData:[NSData dataWithBytes:(const void *)bufferPtrlength:(NSUInteger)movedBytes] encoding:NSUTF8StringEncoding];return result;
}

//1、设置您需要的密匙、偏移量
//密匙 key
#define gkey            @"Kyle_Chu"
//偏移量
#define gIv             @"jukai"

// @"kyle_jukai" 是测试字符串，换成您需要加密的内容即可

JKEncrypt * en = [[JKEncrypt alloc]init];
//加密
NSString * encryptStr = [en doEncryptStr: @"kyle_jukai"];NSString * encryptHex = [en doEncryptHex: @"kyle_jukai"];NSLog(@"字符串加密:%@",encryptStr);
NSLog(@"十六进制加密:%@",encryptHex);
//解密
NSString *decEncryptStr = [en doDecEncryptStr:encryptStr];NSString *decEncryptHex = [en doEncryptHex:encryptHex];NSLog(@"字符串解密:%@",decEncryptStr);
NSLog(@"字符串解密:%@",decEncryptHex);