iOS开发——MD5加密

- (NSString *)md5:(NSString *)str

{

const char *cStr = [str UTF8String];

unsigned char result[16];

CC_MD5(cStr, (CC_LONG)strlen(cStr), result);

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]

];

}