From: Andy Polyakov <appro@openssl.org>
Date: Fri, 24 Nov 2017 10:37:59 +0000 (+0100)
Subject: test/bntest.c: add rsaz_1024_mul_avx2 regression test.
X-Git-Tag: OpenSSL_1_1_1-pre1~365
X-Git-Url: https://git.openssl.org/?p=openssl.git;a=commitdiff_plain;h=77d75993651b63e872244a3256e37967bb3c3e9e

test/bntest.c: add rsaz_1024_mul_avx2 regression test.

Reviewed-by: Rich Salz <rsalz@openssl.org>
---

diff --git a/test/bntest.c b/test/bntest.c
index 9eda5bd825..fc3d0756f0 100644
--- a/test/bntest.c
+++ b/test/bntest.c
@@ -425,6 +425,28 @@ static int test_modexp_mont5(void)
     if (!TEST_BN_eq(c, d))
         goto err;
 
+    /* Regression test for bug in rsaz_1024_mul_avx2 */
+    BN_hex2bn(&a,
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF2020202020DF");
+    BN_hex2bn(&b,
+        "2020202020202020202020202020202020202020202020202020202020202020"
+        "2020202020202020202020202020202020202020202020202020202020202020"
+        "20202020202020FF202020202020202020202020202020202020202020202020"
+        "2020202020202020202020202020202020202020202020202020202020202020");
+    BN_hex2bn(&n,
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF2020202020FF");
+    BN_MONT_CTX_set(mont, n, ctx);
+    BN_mod_exp_mont_consttime(c, a, b, n, ctx, mont);
+    BN_mod_exp_mont(d, a, b, n, ctx, mont);
+    if (!TEST_BN_eq(c, d))
+        goto err;
+
     /* Zero input */
     BN_bntest_rand(p, 1024, 0, 0);
     BN_zero(a);