iOS使用MD5加密

#import <Foundation/Foundation.h>

@interface NSString (md5)

/**
*  将字符串使用MD5加密
*
*  @return 加密后的字符串
*/
-(NSString *)md5String;

@end

#import "NSString+md5.h"
// 需要导包
#import <CommonCrypto/CommonDigest.h>

@implementation NSString (md5)

-(NSString *)md5String
{
const char *cStr = self.UTF8String;
unsigned char digest[CC_MD5_DIGEST_LENGTH];
CC_MD5(cStr, (int)self.length, digest);
NSMutableString *result = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
{
[result appendFormat:@"%02x", digest[i]];
}
return result;
}

@end

#import <Foundation/Foundation.h>
#import "NSString+md5.h"

int main(int argc, const char * argv[]) {
@autoreleasepool {
NSString *password = @"123456";
NSString *pwdWithMD5 = [password md5String];
NSLog(@"%@", pwdWithMD5);
}
return 0;
}