IOS常用加密Encryption

NSString+Encryption.h

//
//  NSString+Encryption.h
//  haochang
//
//  Created by Administrator on 14-4-15.
//  Copyright (c) 2014年 Administrator. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSString (Encryption)

+ (NSString *)md5:(NSString *)str;

+ (NSString*) sha1:(NSString *)str;

@end

//
//  NSString+Encryption.m
//  haochang
//
//  Created by Administrator on 14-4-15.
//  Copyright (c) 2014年 Administrator. All rights reserved.
//

#import "NSString+Encryption.h"

#import <CommonCrypto/CommonDigest.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <errno.h>
#include <net/if_dl.h>

#include <ifaddrs.h>
#include <arpa/inet.h>

#define min(a,b) ((a) < (b) ? (a) : (b))
#define max(a,b) ((a) > (b) ? (a) : (b))

@implementation NSString (Encryption)


+ (NSString *)md5:(NSString *)str{
    const char *cStr = [str UTF8String];
    unsigned char result[16];
    CC_MD5(cStr, strlen(cStr), result); // This is the md5 call
    return [NSString stringWithFormat:
            @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
            result[0], result[1], result[2], result[3],
            result[4], result[5], result[6], result[7],
            result[8], result[9], result[10], result[11],
            result[12], result[13], result[14], result[15]
            ];
}
+ (NSString*) sha1:(NSString *)str
{
    const char *cstr = [str cStringUsingEncoding:NSUTF8StringEncoding];
    NSData *data = [NSData dataWithBytes:cstr length:str.length];
    
    uint8_t digest[CC_SHA1_DIGEST_LENGTH];
    
    CC_SHA1(data.bytes, data.length, digest);
    
    NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];
    
    for(int i = 0; i < CC_SHA1_DIGEST_LENGTH; i++)
        [output appendFormat:@"%02x", digest[i]];
    
    return output;
}

@end