162 lines
3.2 KiB
C
162 lines
3.2 KiB
C
#include <openssl/opensslconf.h>
|
|
#ifdef OPENSSL_NO_SRP
|
|
|
|
#include <stdio.h>
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
printf("No SRP support\n");
|
|
return(0);
|
|
}
|
|
|
|
#else
|
|
|
|
#include <openssl/srp.h>
|
|
#include <openssl/rand.h>
|
|
#include <openssl/err.h>
|
|
|
|
static void showbn(const char *name, const BIGNUM *bn)
|
|
{
|
|
fputs(name, stdout);
|
|
fputs(" = ", stdout);
|
|
BN_print_fp(stdout, bn);
|
|
putc('\n', stdout);
|
|
}
|
|
|
|
#define RANDOM_SIZE 32 /* use 256 bits on each side */
|
|
|
|
static int run_srp(const char *username, const char *client_pass, const char *server_pass)
|
|
{
|
|
int ret=-1;
|
|
BIGNUM *s = NULL;
|
|
BIGNUM *v = NULL;
|
|
BIGNUM *a = NULL;
|
|
BIGNUM *b = NULL;
|
|
BIGNUM *u = NULL;
|
|
BIGNUM *x = NULL;
|
|
BIGNUM *Apub = NULL;
|
|
BIGNUM *Bpub = NULL;
|
|
BIGNUM *Kclient = NULL;
|
|
BIGNUM *Kserver = NULL;
|
|
unsigned char rand_tmp[RANDOM_SIZE];
|
|
/* use builtin 1024-bit params */
|
|
SRP_gN *GN = SRP_get_default_gN("1024");
|
|
|
|
if(GN == NULL)
|
|
{
|
|
fprintf(stderr, "Failed to get SRP parameters\n");
|
|
return -1;
|
|
}
|
|
/* Set up server's password entry */
|
|
if(!SRP_create_verifier_BN(username, server_pass, &s, &v, GN->N, GN->g))
|
|
{
|
|
fprintf(stderr, "Failed to create SRP verifier\n");
|
|
return -1;
|
|
}
|
|
|
|
showbn("N", GN->N);
|
|
showbn("g", GN->g);
|
|
showbn("Salt", s);
|
|
showbn("Verifier", v);
|
|
|
|
/* Server random */
|
|
RAND_pseudo_bytes(rand_tmp, sizeof(rand_tmp));
|
|
b = BN_bin2bn(rand_tmp, sizeof(rand_tmp), NULL);
|
|
/* TODO - check b != 0 */
|
|
showbn("b", b);
|
|
|
|
/* Server's first message */
|
|
Bpub = SRP_Calc_B(b, GN->N, GN->g, v);
|
|
showbn("B", Bpub);
|
|
|
|
if(!SRP_Verify_B_mod_N(Bpub, GN->N))
|
|
{
|
|
fprintf(stderr, "Invalid B\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Client random */
|
|
RAND_pseudo_bytes(rand_tmp, sizeof(rand_tmp));
|
|
a = BN_bin2bn(rand_tmp, sizeof(rand_tmp), NULL);
|
|
/* TODO - check a != 0 */
|
|
showbn("a", a);
|
|
|
|
/* Client's response */
|
|
Apub = SRP_Calc_A(a, GN->N, GN->g);
|
|
showbn("A", Apub);
|
|
|
|
if(!SRP_Verify_A_mod_N(Apub, GN->N))
|
|
{
|
|
fprintf(stderr, "Invalid A\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Both sides calculate u */
|
|
u = SRP_Calc_u(Apub, Bpub, GN->N);
|
|
|
|
/* Client's key */
|
|
x = SRP_Calc_x(s, username, client_pass);
|
|
Kclient = SRP_Calc_client_key(GN->N, Bpub, GN->g, x, a, u);
|
|
showbn("Client's key", Kclient);
|
|
|
|
/* Server's key */
|
|
Kserver = SRP_Calc_server_key(Apub, v, u, b, GN->N);
|
|
showbn("Server's key", Kserver);
|
|
|
|
if(BN_cmp(Kclient, Kserver) == 0)
|
|
{
|
|
ret = 0;
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr, "Keys mismatch\n");
|
|
ret = 1;
|
|
}
|
|
|
|
BN_clear_free(Kclient);
|
|
BN_clear_free(Kserver);
|
|
BN_clear_free(x);
|
|
BN_free(u);
|
|
BN_free(Apub);
|
|
BN_clear_free(a);
|
|
BN_free(Bpub);
|
|
BN_clear_free(b);
|
|
BN_free(s);
|
|
BN_clear_free(v);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
BIO *bio_err;
|
|
bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
|
|
|
|
CRYPTO_malloc_debug_init();
|
|
CRYPTO_dbg_set_options(V_CRYPTO_MDEBUG_ALL);
|
|
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
|
|
|
|
ERR_load_crypto_strings();
|
|
|
|
/* "Negative" test, expect a mismatch */
|
|
if(run_srp("alice", "password1", "password2") == 0)
|
|
{
|
|
fprintf(stderr, "Mismatched SRP run failed\n");
|
|
return 1;
|
|
}
|
|
|
|
/* "Positive" test, should pass */
|
|
if(run_srp("alice", "password", "password") != 0)
|
|
{
|
|
fprintf(stderr, "Plain SRP run failed\n");
|
|
return 1;
|
|
}
|
|
|
|
CRYPTO_cleanup_all_ex_data();
|
|
ERR_remove_thread_state(NULL);
|
|
ERR_free_strings();
|
|
CRYPTO_mem_leaks(bio_err);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|