ios aes128

ase128.m

//
//  ViewController.m
//  AES加密
//
//  Created by Ajun on 15/06/2018.
//  Copyright © 2018 Ajun. All rights reserved.
//

#import "ViewController.h"
#import <CommonCrypto/CommonCrypto.h>

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
  
    [ViewController AesEncrypt:@""];
//    NSString * j = [ self md5:@"1eVRiqy7b9Uv7ZMM"].copy;
//    NSLog(@"%@",j);
}
//AES加密

+(NSString*)AesEncrypt:(NSString*)str{
    
    NSString *originString = @"hello little shell-123456";
    const char * cOriginString = [originString cStringUsingEncoding:NSUTF8StringEncoding];
//    char cOriginArray[] = cOriginString;
    
    NSString*key=@"1eVRiqy7b9Uv7ZMM";//密钥
//      NSString*key=@"aabd3d3d7d64dea9";//密钥

    
    NSData*data=[originString dataUsingEncoding:NSUTF8StringEncoding];//待加密字符转为NSData型
    
    char keyPtr[kCCKeySizeAES128+1];
    
    memset(keyPtr,0,sizeof(keyPtr));
    
    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];

    const char * cKey = [key cStringUsingEncoding:NSUTF8StringEncoding];
    
//    [key getCString:keyPtrmaxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
    
    NSUInteger dataLength = [data length];
//    NSUInteger dataLength = sizeof( *cOriginString);
    
    size_t bufferSize = dataLength +kCCBlockSizeAES128;
    
    void* buffer =malloc(bufferSize);
    
    size_t numBytesCrypted =0;
    
    
    CCCryptorStatus status = CCCrypt(kCCEncrypt, kCCAlgorithmAES128, kCCModeECB | kCCOptionPKCS7Padding, keyPtr, kCCBlockSizeAES128, NULL, data.bytes, dataLength, buffer, bufferSize, &numBytesCrypted);
    
//    CCCryptorStatuscryptStatus =CCCrypt(kCCEncrypt,    //  加密    kCCDecrypt解密
//kCCAlgorithmAES128,    //填充方式
//                                        
//                                             kCCOptionPKCS7Padding|kCCOptionECBMode,      //工作模式
//                                        
//                                              keyPtr, //AES的密钥长度有128字节、192字节、256字节几种，这里举出可能存在的最大长度
//                                        
//                                              kCCBlockSizeAES128,      //密文长度+补位长度
//                                        
//                                              nil,     //偏移量，由于是对称加密，用不到
//                                        
//                                              [databytes],   //字节大小
//                                        
//                                              dataLength,    //字节长度
//                                        
//                                              buffer,       
//                                        
//                                              bufferSize,  
//                                        
//                                              &numBytesCrypted);
    
    if(status ==kCCSuccess) {
        
//        NSData*resultData=[NSData dataWithBytesNoCopy:buffer length :numBytesCrypted];
        NSData *resultData = [NSData dataWithBytes:buffer length:numBytesCrypted];
        
        NSLog(@"%@",[ViewController convertDataToHexStr:resultData]);
        
    }
    
    free(buffer);
    
    return nil;
    
}
- (NSString *) md5:(NSString *) input {
    
    const char *cStr = [input UTF8String];
    
    unsigned char digest[CC_MD5_DIGEST_LENGTH];
    
    CC_MD5( cStr, strlen(cStr), digest ); // This is the md5 call
    
    
    
    NSMutableString *output = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
    
    
    
    for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
        
        [output appendFormat:@"%02x", digest[i]];
    
    
    
    return  output;
    
}
    //NSData转换为16进制
+ (NSString*)convertDataToHexStr:(NSData*)data {
    if (!data || [data length] ==0) {
        return @"";
    }
    NSMutableString *string = [[NSMutableString alloc]initWithCapacity:[data length]/2];
    
    [data enumerateByteRangesUsingBlock:^(const void*bytes,NSRange byteRange,BOOL*stop) {
        unsigned char *dataBytes = (unsigned  char*)bytes;
        for (NSInteger i =0; i < byteRange.length; i++) {
            NSString *hexStr = [NSString stringWithFormat:@"%x", (dataBytes[i]) & 0xff];
            if ([hexStr length] ==2) {
                [string appendString:hexStr];
            } else {
                [string appendFormat:@"0%@", hexStr];
            }
        }
    }];
    
    return string;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end


//密文：68f7ec213e13005bd56db544b37cfde0696757b13684fcf5e2f3a720615737a8