X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/blobdiff_plain/8a9ec85763809cd3e849d3b00750ba74222dee18..e99bb8bfc8d2c1a47b6ae90ef43683d191c30f66:/sshpubk.c

diff --git a/sshpubk.c b/sshpubk.c
index bd3c5e47..4db37c2b 100644
--- a/sshpubk.c
+++ b/sshpubk.c
@@ -67,14 +67,15 @@ static int loadrsakey_main(FILE * fp, struct RSAKey *key, int pub_only,
     i += 4;
 
     /* Now the serious stuff. An ordinary SSH-1 public key. */
-    i += makekey(buf + i, len, key, NULL, 1);
-    if (i < 0)
+    j = makekey(buf + i, len, key, NULL, 1);
+    if (j < 0)
 	goto end;		       /* overran */
+    i += j;
 
     /* Next, the comment field. */
     j = GET_32BIT(buf + i);
     i += 4;
-    if (len - i < j)
+    if (j < 0 || len - i < j)
 	goto end;
     comment = snewn(j + 1, char);
     if (comment) {