/* Copyright (c) 2011,2013, NORDUnet A/S */
/* See LICENSE for licensing information. */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "fticks_hashmac.h"
#include "radsecproxy.h"

void usage(void) {
    fprintf(stderr,
            "usage: radsecproxy-hash [-h] [-k key] [mac]...\n"
#if defined(READ_CONFIG)
            "   -c configfile\tuse configuration from CONFIGFILE\n"
#endif
            "   -h\t\t\tdisplay this help and exit\n"
            "   -k key\t\tuse KEY for HMAC\n"
            "      mac\t\tMAC address to hash. Read from stdin if omitted.\n");
    exit(1);
}

#define MYNAME "radsecproxy-hash"

void print_hash(uint8_t *mac, uint8_t *key) {
    uint8_t buf[64 + 1];

    if (fticks_hashmac(mac, key, sizeof(buf), buf) != 0) {
        fprintf(stderr, "%s: out of memory\n", MYNAME);
        exit(3);
    }
    puts((const char *)buf);
}

int main(int argc, char *argv[]) {
    int opt;
#if defined(READ_CONFIG)
    char *config = NULL;
#endif
    char mac[80 + 1];
    uint8_t *key = NULL;

    while ((opt = getopt(argc, argv, "hk:")) != -1) {
        switch (opt) {
#if defined(READ_CONFIG)
        case 'c':
            config = optarg;
            break;
#endif
        case 'h':
            usage();
        case 'k':
            key = (uint8_t *)optarg;
            break;
        default:
            usage();
        }
    }

    if (optind < argc) {
        while (optind < argc) {
            print_hash((uint8_t *)argv[optind++], key);
        }
    } else {
        while (fgets(mac, sizeof(mac), stdin) != NULL) {
            print_hash((uint8_t *)mac, key);
        }
    }

    return 0;
}

/* Local Variables: */
/* c-file-style: "stroustrup" */
/* End: */
