UIDIvice的几个拓展功能（获取唯一标示、判断是否越狱）

最近的项目中用到了几个比较不常用的方法：

 

（1）获取设备的唯一标示，有的应用，如银行、支付、广告等可能需要绑定设备，但是苹果由于种种原因现在已经停止了使用UIDivice的uniqueIdentifier属性，所以只有改用MAC地址。

 

（2）有些金融类的应用出于安全对已越狱的设备进行友谊提示，所以要判断ios是否越狱。

 

 

#import <Foundation/Foundation.h>


@interface UIDevice (Help)


/*
 *根据mac地址和设备信息获取设备唯一标示（ios5以后的系统中已经停止使用设备标示uniqueIdentifier）
 */
- (NSString *) uniqueDeviceIdentifier;

/*
 *根据mac地址获取设备唯一标示（ios5以后的系统中已经停止使用设备标示uniqueIdentifier）
 */
- (NSString *) uniqueGlobalDeviceIdentifier;

/*
 *判断设备是否越狱
 */
- (BOOL)isJailbroken;

@end

 

 

#import "UIDevice+Help.h"
#import "NSString+MD5Addition.h"
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>

@interface UIDevice(Private)

- (NSString *) macaddress;

@end

@implementation UIDevice (Help)

#pragma mark -
#pragma mark Private Methods

/*
 *获取MAC地址
 */
- (NSString *) macaddress{
    int                 mib[6];
    size_t              len;
    char                *buf;
    unsigned char       *ptr;
    struct if_msghdr    *ifm;
    struct sockaddr_dl  *sdl;
    mib[0] = CTL_NET;
    mib[1] = AF_ROUTE;
    mib[2] = 0;
    mib[3] = AF_LINK;
    mib[4] = NET_RT_IFLIST;
    if ((mib[5] = if_nametoindex("en0")) == 0) {
        printf("Error: if_nametoindex error\n");
        return NULL;
    }
    if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
        printf("Error: sysctl, take 1\n");
        return NULL;
    }
    if ((buf = malloc(len)) == NULL) {
        printf("Could not allocate memory. error!\n");
        return NULL;
    }
    if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
        printf("Error: sysctl, take 2");
        free(buf);
        return NULL;
    }
    ifm = (struct if_msghdr *)buf;
    sdl = (struct sockaddr_dl *)(ifm + 1);
    ptr = (unsigned char *)LLADDR(sdl);
    NSString *outstring = [NSString stringWithFormat:@"%02X:%02X:%02X:%02X:%02X:%02X", 
                           *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];
    free(buf);
    return outstring;
}


#pragma mark -
#pragma mark Public Methods

- (NSString *) uniqueDeviceIdentifier{
    NSString *macaddress = [[UIDevice currentDevice] macaddress];
    NSString *bundleIdentifier = [[NSBundle mainBundle] bundleIdentifier];
    NSString *stringToHash = [NSString stringWithFormat:@"%@%@",macaddress,bundleIdentifier];
    NSString *uniqueIdentifier = [stringToHash stringFromMD5];
    return uniqueIdentifier;
}

- (NSString *) uniqueGlobalDeviceIdentifier{
    NSString *macaddress = [[UIDevice currentDevice] macaddress];
    NSString *uniqueIdentifier = [macaddress stringFromMD5];
    return uniqueIdentifier;
}

- (BOOL)isJailbroken {
    BOOL jailbroken = NO;  
    NSString *cydiaPath = @"/Applications/Cydia.app";  
    NSString *aptPath = @"/private/var/lib/apt/";  
    if ([[NSFileManager defaultManager] fileExistsAtPath:cydiaPath]) {  
        jailbroken = YES;  
    }  
    if ([[NSFileManager defaultManager] fileExistsAtPath:aptPath]) {  
        jailbroken = YES;  
    }  
    return jailbroken;  
}  

@end

 

MD5加密

 

#import <Foundation/Foundation.h>

@interface NSString(MD5Addition)

- (NSString *) stringFromMD5;

@end

#import "NSString+MD5Addition.h"
#import <CommonCrypto/CommonDigest.h>

@implementation NSString(MD5Addition)

- (NSString *) stringFromMD5{
    
    if(self == nil || [self length] == 0)
        return nil;
    
    const char *value = [self UTF8String];
    
    unsigned char outputBuffer[CC_MD5_DIGEST_LENGTH];
    CC_MD5(value, strlen(value), outputBuffer);
    
    NSMutableString *outputString = [[NSMutableString alloc] initWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
    for(NSInteger count = 0; count < CC_MD5_DIGEST_LENGTH; count++){
        [outputString appendFormat:@"%02x",outputBuffer[count]];
    }
    
    return [outputString autorelease];
}

@end