ibe_test.c

这是一个unix环境下实现基于身份的PKI系统源码

/* Simple IBE test program
 * Ben Lynn
 */
/*
Copyright (C) 2001 Benjamin Lynn ([e-mail])

See LICENSE for license
*/
#include "ibe.h"

int main(void)
{
    char *id;
    params_t params;
    byte_string_t U;
    byte_string_t secret;
    byte_string_t key;
    byte_string_t master;

    //initialize IBE library
    IBE_init();

    //generate new system parameters:
    //128-bit prime, 64-bit subgroup size

    IBE_setup(params, master, 512, 160, "test");

    id = "[e-mail]";

    printf("IBE test program\n");
    printf("Test ID: %s\n", id);

    //generate a random secret and its encryption
    printf("generating key...\n");

    IBE_KEM_encrypt(secret, U, id, params);

    //print ciphertext in hexadecimal
    printf("U =");
    byte_string_printf(U, " %02X");
    printf("\n");

    printf("secret =");
    byte_string_printf(secret, " %02X");
    printf("\n");
    byte_string_clear(secret);

    //Extract the private key corresponding to my ID
    //This is not the normal way of getting a private key;
    //normally the master secret is unknown on the decryption side
    //and they have obtained their private key by fetching it from the PKG

    printf("extracting...\n");
    IBE_extract(key, master, id, params);
    //The key is now stored in keytext and has length keytextlen

    //Recover the secret from its encryption
    printf("recovering secret...\n");
    IBE_KEM_decrypt(secret, U, key, params);

    //Print it out. Hopefully it'll be the same as before
    printf("secret =");
    byte_string_printf(secret, " %02X");
    printf("\n");

    //free memory used by IBE library
    params_clear(params);
    IBE_clear();
    byte_string_clear(U);
    byte_string_clear(key);
    byte_string_clear(secret);
    byte_string_clear(master);

    return 0;
}