iOS SDK自带 md5加密

- (NSString *) md5:(NSString *) input{

    const char *cStr = [input UTF8String];

    unsigned char digest[16];

    CC_MD5( cStr, strlen(cStr), digest ); // This is the md5 call

    

    NSMutableString *output = [NSMutableStringstringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];

    

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

        [output appendFormat:@"%02x", digest[i]];

    

    return  output;

}

 

 

 

- (NSString *)getMD5:(NSString *)str {

    const char *cStr = [str UTF8String];

    unsigned char result[16];

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

    return [NSStringstringWithFormat:

            @"%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]         

            ]; 

}