driver/security_driver.c

#include <stdio.h>
#include <string.h>
#include <openssl/ec.h>
#include <openssl/ecdsa.h>
#include <openssl/obj_mac.h>
#include <openssl/jpake.h>
#include <openssl/ecdh.h>
#include <polarssl/ctr_drbg.h>

int entropy(void *closure, unsigned char *outentropy, size_t outsize)
{
    unsigned char *entropy;
    int           rval, idx;

printf("hey, somebody wants entropy: %p, %d\n", outentropy, outsize);
    do
    {
#ifdef gPlatformGetRandomNumber
        rval = (int)gPlatformGetRandomNumber();
#else
        rval = rand();
#endif

        entropy = (unsigned char *)&rval;
printf("got some sweet entropy: %08x\n", rval);

        for (idx = 0; (idx < sizeof(int)) && (outsize > 0); idx++, outsize--)
            *outentropy++ = *entropy++;
    }
    while (outsize > 0);

    return 0;
}

ctr_drbg_context *gCTRDRBG_ctx = NULL;

int main(int argc, char ** argv)
{
    int retval = 0;
    int i;

#ifdef gPlatformSetInputEntropy
    gPlatformSetInputEntropy(seed);
#else
    time_t tim;

    tim = time(NULL);

    srand(tim);
#endif

    // Force linker references to the necessary top-level functions.

    static void *functions[] =
    {
        (void *)ECDSA_do_sign,
        (void *)ECDSA_do_verify,

        (void *)JPAKE_STEP1_init,
        (void *)JPAKE_STEP1_generate,
        (void *)JPAKE_STEP1_process,
        (void *)JPAKE_STEP1_release,
        (void *)JPAKE_STEP2_init,
        (void *)JPAKE_STEP2_generate,
        (void *)JPAKE_STEP2_process,
        (void *)JPAKE_STEP2_release,

        (void *)ECDH_compute_key,
        NULL
    };

    for (i = 0; functions[i] != NULL; i++)
        printf("%p\n", functions[i]);

    ctr_drbg_context    ctx;

#ifdef DEBUG
    ctr_drbg_self_test(1);
#endif

    retval = ctr_drbg_init(&ctx, entropy, NULL, NULL, 0);

    gCTRDRBG_ctx = &ctx;

    printf("returning: %d\n", retval);

    return retval;
}