Prefix Preserving?

anontool

# ./anon_ip 192.168.1.31
192.168.1.31 -> 255.39.206.200
# ./anon_ip 192.168.1.32
192.168.1.32 -> 255.39.206.225

anontool_anon_ip.cpp

#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <getopt.h>
#include <string.h>
#include <arpa/inet.h>
#include "anonymization.h"
#include "anon_prefix_preserving.h"


int main(int argc, char *argv[])
{
	
	char ip[4];
	inet_pton(AF_INET, argv[1], (void *)ip);
	// unsigned int ip = (unsigned int)atoi(argv[0]);
	// unsigned char raw_ip[4];
	// memcpy(raw_ip, &ip, 4);
	unsigned char anon_ip[4];
	memcpy(anon_ip, ip, 4);

	prefix_preserving_anonymize_field(anon_ip);


	printf("%s -> %i.%i.%i.%i\n", argv[1], anon_ip[0], anon_ip[1], anon_ip[2], anon_ip[3]);
	// printf("ip: %i.%i.%i.%i\n", raw_ip[3], raw_ip[2], raw_ip[1], raw_ip[0]);
	
	return 0;
}

Cryptopan

# ./anon_ip 192.168.1.31
192.168.1.31 -> 97.1.208.192

# ./anon_ip 192.168.1.32
192.168.1.32 -> 68.1.196.254

cryptopan_anon_ip.cpp

#include <stdlib.h>
#include <stdio.h>
#include "panonymizer.h"
#include <arpa/inet.h>

int main(int argc, char * argv[]) {
    // Provide your own 256-bit key here
    unsigned char my_key[32] = 
    {21,34,23,141,51,164,207,128,19,10,91,22,73,144,125,16,
     216,152,143,131,121,121,101,39,98,87,76,45,42,132,34,2};

    unsigned int raw_addr, anonymized_addr;

    // Create an instance of PAnonymizer with the key
    PAnonymizer my_anonymizer(my_key);

    // float packet_time;
    unsigned int packet_size, packet_addr1, packet_addr2, packet_addr3, packet_addr4;

    if (argc != 2) {
      fprintf(stderr, "usage: ip_address\n");
      exit(-1);
    }

	inet_pton(AF_INET, argv[1], (void *)&raw_addr);

	//Anonymize the raw IP
	anonymized_addr = my_anonymizer.anonymize(raw_addr);

	//convert the anonymized IP from unsigned int format to a.b.c.d format
	packet_addr1 = anonymized_addr >> 24;
	packet_addr2 = (anonymized_addr << 8) >> 24;
	packet_addr3 = (anonymized_addr << 16) >> 24;
	packet_addr4 = (anonymized_addr << 24) >> 24;

	printf("%s -> %u.%u.%u.%u\n", argv[1], packet_addr1, packet_addr2, packet_addr3, packet_addr4 );
    

}