From: Michael Schroeder <mls@suse.de>
Date: Sun, 17 May 2020 16:05:43 +0000 (+0200)
Subject: solv_pgpvrfy: fix buf in modulo reduction
X-Git-Tag: 0.7.14~16
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6b66dba626cbab48f7503f39dee8ac235189207c;p=thirdparty%2Flibsolv.git

solv_pgpvrfy: fix buf in modulo reduction

The carry propagation did not work when subtracting
the modulo at the end of the computation.

I am amazed that this did not show up earlier.
---

diff --git a/ext/solv_pgpvrfy.c b/ext/solv_pgpvrfy.c
index 9bc256ca..a5b8f830 100644
--- a/ext/solv_pgpvrfy.c
+++ b/ext/solv_pgpvrfy.c
@@ -101,7 +101,7 @@ mpdomod(int len, mp_t *target, mp2_t x, mp_t *mod)
       n = 0;
       for (j = 0; j <= i; j++)
 	{
-	  mp2_t n2 = mod[j] + n;
+	  mp2_t n2 = (mp2_t)mod[j] + n;
 	  n = n2 > target[j] ? 1 : 0;
 	  target[j] -= (mp_t)n2;
 	}