From: ben <ben@cda61777-01e9-0310-a592-d414129be87e>
Date: Wed, 19 Jan 2005 23:30:38 +0000 (+0000)
Subject: Add an assertion so that short-rsa2-key-crash at least avoids segfaulting
X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/commitdiff_plain/e99cd73fed21152a2cea8d43cd76d33eda408b08

Add an assertion so that short-rsa2-key-crash at least avoids segfaulting
while we come up with a better solution.


git-svn-id: svn://svn.tartarus.org/sgt/putty@5146 cda61777-01e9-0310-a592-d414129be87e
---

diff --git a/sshrsa.c b/sshrsa.c
index baec83e0..4f95fb38 100644
--- a/sshrsa.c
+++ b/sshrsa.c
@@ -802,6 +802,7 @@ static unsigned char *rsa2_sign(void *key, char *data, int datalen,
     SHA_Simple(data, datalen, hash);
 
     nbytes = (bignum_bitcount(rsa->modulus) - 1) / 8;
+    assert(1 <= nbytes - 20 - ASN1_LEN);
     bytes = snewn(nbytes, unsigned char);
 
     bytes[0] = 1;