NSString+Hashes.m

//
//  NSString+Hashes.m
//  YJShare
//
//  Created by yangjw  on 13-12-24.
//  Copyright (c) 2013年 yangjw . All rights reserved.
//

#import <CommonCrypto/CommonDigest.h>

#import "NSString+Hashes.h"

@implementation NSString (Hashes)

- (NSString *)md5
{
    NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding];
    uint8_t digest[CC_MD5_DIGEST_LENGTH];
	
    CC_MD5(data.bytes, data.length, digest);
    
    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;
}

- (NSString *)sha1
{
    NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding];
    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;
}

- (NSString *)sha256
{
    NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding];
    uint8_t digest[CC_SHA256_DIGEST_LENGTH];
    
    CC_SHA256(data.bytes, data.length, digest);
    
    NSMutableString *output = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH * 2];
    
    for (int i = 0; i < CC_SHA256_DIGEST_LENGTH; i++)
    {
        [output appendFormat:@"%02x", digest[i]];
    }
    
    return output;
}

- (NSString *)sha512
{
    NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding];
    uint8_t digest[CC_SHA512_DIGEST_LENGTH];
    
    CC_SHA512(data.bytes, data.length, digest);
    
    NSMutableString *output = [NSMutableString stringWithCapacity:CC_SHA512_DIGEST_LENGTH * 2];
    
    for (int i = 0; i < CC_SHA512_DIGEST_LENGTH; i++)
    {
        [output appendFormat:@"%02x", digest[i]];
    }
    
    return output;
}

@end