projects
/
u
/
mdw
/
putty
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
| inline |
side by side
Avoid trying to take the modular inverse of zero in response to a
[u/mdw/putty]
/
sshdss.c
diff --git
a/sshdss.c
b/sshdss.c
index
bf6c3ba
..
3ea3695
100644
(file)
--- a/
sshdss.c
+++ b/
sshdss.c
@@
-276,6
+276,12
@@
static int dss_verifysig(void *key, char *sig, int siglen,
return 0;
}
+ if (!bignum_cmp(s, Zero)) {
+ freebn(r);
+ freebn(s);
+ return 0;
+ }
+
/*
* Step 1. w <- s^-1 mod q.
*/