X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=sshrsa.c;h=6403343b247aac01aa7fd97675f67a687813064e;hb=896bb7c74d06200d92f846d666224e3f9c80b634;hp=77a6bb250cec41c11b2e4df6ccac28aef1c7ab5a;hpb=aa5bae89163f96453ee84541c1e96c650b3bc8f8;p=PuTTY.git

diff --git a/sshrsa.c b/sshrsa.c
index 77a6bb25..6403343b 100644
--- a/sshrsa.c
+++ b/sshrsa.c
@@ -525,7 +525,9 @@ static void getstring(char **data, int *datalen, char **p, int *length)
     *p = NULL;
     if (*datalen < 4)
 	return;
-    *length = GET_32BIT(*data);
+    *length = toint(GET_32BIT(*data));
+    if (*length < 0)
+        return;
     *datalen -= 4;
     *data += 4;
     if (*datalen < *length)