make post failure simulation reversible in all cases

[openssl.git] / fips / rand / fips_rand_selftest.c

diff --git a/fips/rand/fips_rand_selftest.c b/fips/rand/fips_rand_selftest.c
index bafce719cade2a9b74a7abc429cee3b2520b425e..ec949cbdbbeecdf3de611a3da3259e585b88a5e6 100644 (file)
--- a/fips/rand/fips_rand_selftest.c
+++ b/fips/rand/fips_rand_selftest.c
@@ -129,15 +129,16 @@ static AES_PRNG_TV aes_256_tv =
 static int do_x931_test(unsigned char *key, int keylen,
                        AES_PRNG_TV *tv)
        {
-       unsigned char R[16];
+       unsigned char R[16], V[16];
        int rv = 1;
+       memcpy(V, tv->V, sizeof(V));
        if (!FIPS_x931_set_key(key, keylen))
                return 0;
        if (!fips_post_started(FIPS_TEST_X931, keylen, NULL))
                return 1;
        if (!fips_post_corrupt(FIPS_TEST_X931, keylen, NULL))
-               tv->V[0]++;
-       FIPS_x931_seed(tv->V, 16);
+               V[0]++;
+       FIPS_x931_seed(V, 16);
        FIPS_x931_set_dt(tv->DT);
        FIPS_x931_bytes(R, 16);
        if (memcmp(R, tv->R, 16))