NSData 转 md5

NSData 转 md5

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NSData+MD5Digest.h

#import <Foundation/Foundation.h>



@interface NSData (MD5Digest)



+(NSData *)MD5Digest:(NSData *)input;

-(NSData *)MD5Digest;



+(NSString *)MD5HexDigest:(NSData *)input;

-(NSString *)MD5HexDigest;



@end

NSData+MD5Digest.m

#import "NSData+MD5Digest.h"

#import <CommonCrypto/CommonDigest.h>



@implementation NSData (MD5)



+(NSData *)MD5Digest:(NSData *)input {

unsigned char result[CC_MD5_DIGEST_LENGTH];



CC_MD5(input.bytes, (CC_LONG)input.length, result);

return [[NSData alloc] initWithBytes:result length:CC_MD5_DIGEST_LENGTH];

}



-(NSData *)MD5Digest {

return [NSData MD5Digest:self];

}



+(NSString *)MD5HexDigest:(NSData *)input {

unsigned char result[CC_MD5_DIGEST_LENGTH];



CC_MD5(input.bytes, (CC_LONG)input.length, result);

NSMutableString *ret = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH*2];

for (int i = 0; i<CC_MD5_DIGEST_LENGTH; i++) {

    [ret appendFormat:@"%02x",result[i]];

}

return ret;

}



-(NSString *)MD5HexDigest {

return [NSData MD5HexDigest:self];

}



@end

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源github地址： suiyi