- fgsch@cvs.openbsd.org 2002/11/15 10:03:09
[authfile.c]
lseek(2) may return -1 when getting the public/private key lenght.
Simplify the code and check for errors using fstat(2).
Problem reported by Mauricio Sanchez, markus@ ok.
diff --git a/authfile.c b/authfile.c
index 1fa5d81..24ae6ab 100644
--- a/authfile.c
+++ b/authfile.c
@@ -36,7 +36,7 @@
*/
#include "includes.h"
-RCSID("$OpenBSD: authfile.c,v 1.50 2002/06/24 14:55:38 markus Exp $");
+RCSID("$OpenBSD: authfile.c,v 1.51 2002/11/15 10:03:09 fgsch Exp $");
#include <openssl/err.h>
#include <openssl/evp.h>
@@ -232,12 +232,17 @@
{
Buffer buffer;
Key *pub;
+ struct stat st;
char *cp;
int i;
off_t len;
- len = lseek(fd, (off_t) 0, SEEK_END);
- lseek(fd, (off_t) 0, SEEK_SET);
+ if (fstat(fd, &st) < 0) {
+ error("fstat for key file %.200s failed: %.100s",
+ filename, strerror(errno));
+ return NULL;
+ }
+ len = st.st_size;
buffer_init(&buffer);
cp = buffer_append_space(&buffer, len);
@@ -318,9 +323,15 @@
CipherContext ciphercontext;
Cipher *cipher;
Key *prv = NULL;
+ struct stat st;
- len = lseek(fd, (off_t) 0, SEEK_END);
- lseek(fd, (off_t) 0, SEEK_SET);
+ if (fstat(fd, &st) < 0) {
+ error("fstat for key file %.200s failed: %.100s",
+ filename, strerror(errno));
+ close(fd);
+ return NULL;
+ }
+ len = st.st_size;
buffer_init(&buffer);
cp = buffer_append_space(&buffer, len);