Prepare for 0.9.8ze-dev

[oweals/openssl.git] / crypto / bn / exptest.c

diff --git a/crypto/bn/exptest.c b/crypto/bn/exptest.c
index f598a07cf5c9919faacdaf095ba905ae338aa2b0..329a05dee2a837a4750a81ab22dcc6bee57f0af0 100644 (file)
--- a/crypto/bn/exptest.c
+++ b/crypto/bn/exptest.c
@@ -71,6 +71,48 @@
 
 static const char rnd_seed[] = "string to make the random number generator think it has entropy";
 
+/*
+ * Disabled for FIPS capable builds because they use the FIPS BIGNUM library
+ * which will fail this test.
+ */
+#ifndef OPENSSL_FIPS
+/* test_exp_mod_zero tests that x**0 mod 1 == 0. It returns zero on success. */
+static int test_exp_mod_zero() {
+       BIGNUM a, p, m;
+       BIGNUM r;
+       BN_CTX *ctx = BN_CTX_new();
+       int ret = 1;
+
+       BN_init(&m);
+       BN_one(&m);
+
+       BN_init(&a);
+       BN_one(&a);
+
+       BN_init(&p);
+       BN_zero(&p);
+
+       BN_init(&r);
+       BN_mod_exp(&r, &a, &p, &m, ctx);
+       BN_CTX_free(ctx);
+
+       if (BN_is_zero(&r))
+               ret = 0;
+       else
+               {
+               printf("1**0 mod 1 = ");
+               BN_print_fp(stdout, &r);
+               printf(", should be 0\n");
+               }
+
+       BN_free(&r);
+       BN_free(&a);
+       BN_free(&p);
+       BN_free(&m);
+
+       return ret;
+}
+#endif
 int main(int argc, char *argv[])
        {
        BN_CTX *ctx;
@@ -190,7 +232,13 @@ int main(int argc, char *argv[])
        ERR_remove_state(0);
        CRYPTO_mem_leaks(out);
        BIO_free(out);
-       printf(" done\n");
+       printf("\n");
+#ifndef OPENSSL_FIPS
+       if (test_exp_mod_zero() != 0)
+               goto err;
+#endif
+       printf("done\n");
+
        EXIT(0);
 err:
        ERR_load_crypto_strings();