From: Matt Caswell <matt@openssl.org>
Date: Tue, 31 May 2016 10:38:52 +0000 (+0100)
Subject: Add a BN_mod_word test()
X-Git-Tag: OpenSSL_1_0_2i~158
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e4c4b2766bb97b34ea3479252276ab7c66311809;p=openssl

Add a BN_mod_word test()

The previous commit fixed a bug with BN_mod_word() which would have been
caught if we had a test for it. This commit adds one.

Reviewed-by: Andy Polyakov <appro@openssl.org>
---

diff --git a/crypto/bn/bntest.c b/crypto/bn/bntest.c
index 1e35988022..a327b1a647 100644
--- a/crypto/bn/bntest.c
+++ b/crypto/bn/bntest.c
@@ -514,7 +514,7 @@ static void print_word(BIO *bp, BN_ULONG w)
 int test_div_word(BIO *bp)
 {
     BIGNUM a, b;
-    BN_ULONG r, s;
+    BN_ULONG r, rmod, s;
     int i;
 
     BN_init(&a);
@@ -528,8 +528,14 @@ int test_div_word(BIO *bp)
 
         s = b.d[0];
         BN_copy(&b, &a);
+        rmod = BN_mod_word(&b, s);
         r = BN_div_word(&b, s);
 
+        if (rmod != r) {
+            fprintf(stderr, "Mod (word) test failed!\n");
+            return 0;
+        }
+
         if (bp != NULL) {
             if (!results) {
                 BN_print(bp, &a);