iOS MD5加密代码

#import <CommonCrypto/CommonDigest.h>

/** md5 一般加密 */
- (NSString *)md5String:( NSString *)str{
const char *myPasswd = [str UTF8String ];
unsigned char mdc[ 16 ];
CC_MD5 (myPasswd, ( CC_LONG ) strlen (myPasswd), mdc);
NSMutableString *md5String = [ NSMutableString string ];
for ( int i = 0 ; i< 16 ; i++) {
[md5String appendFormat : @"%02x" ,mdc[i]];
}
return md5String;
}

/** md5 NB(牛逼的意思) 加密 */

- (NSString *)md5StringNB:(NSString *)str {
const char *myPasswd = [str UTF8String ];
unsigned char mdc[ 16 ];
CC_MD5 (myPasswd, ( CC_LONG ) strlen (myPasswd), mdc);
NSMutableString *md5String = [ NSMutableString string ];
[md5String appendFormat : @"%02x" ,mdc[ 0 ]];
for ( int i = 1 ; i< 16 ; i++) {
[md5String appendFormat : @"%02x" ,mdc[i]^mdc[ 0 ]];
}
return md5String;
}