目标C中的MD5算法 [英] MD5 algorithm in Objective C
本文介绍了目标C中的MD5算法的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何计算目标C中的MD5?
How to calculate the MD5 in objective C ?
推荐答案
md5在iPhone上可用,可以添加为添加对于ie NSString
和 NSData
如下所示。
md5 is available on the iPhone and can be added as an addition for ie NSString
and NSData
like below.
MyAdditions .h
MyAdditions.h
@interface NSString (MyAdditions)
- (NSString *)md5;
@end
@interface NSData (MyAdditions)
- (NSString*)md5;
@end
MyAdditions.m
MyAdditions.m
#import "MyAdditions.h"
#import <CommonCrypto/CommonDigest.h> // Need to import for CC_MD5 access
@implementation NSString (MyAdditions)
- (NSString *)md5
{
const char *cStr = [self UTF8String];
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5( cStr, (int)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]
];
}
@end
@implementation NSData (MyAdditions)
- (NSString*)md5
{
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5( self.bytes, (int)self.length, 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]
];
}
@end
编辑
添加NSData md5,因为我需要它,并认为这是一个很好的地方来保存这个小代码片段。
EDIT
Added NSData md5 because I needed it myself and thought this is a good place to save this little snippet...
这些方法使用NIST MD5测试载体
http://www.nsrl.nist.gov/testdata/
These methods are verified using the NIST MD5 test vectors in http://www.nsrl.nist.gov/testdata/
这篇关于目标C中的MD5算法的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文