*/
#include "includes.h"
-RCSID("$OpenBSD: authfile.c,v 1.54 2003/05/24 09:30:39 djm Exp $");
+RCSID("$OpenBSD: authfile.c,v 1.60 2004/12/11 01:48:56 dtucker Exp $");
#include <openssl/err.h>
#include <openssl/evp.h>
#include "log.h"
#include "authfile.h"
#include "rsa.h"
+#include "misc.h"
/* Version identification string for SSH v1 identity files. */
static const char authfile_id_string[] =
int fd, i, cipher_num;
CipherContext ciphercontext;
Cipher *cipher;
- u_int32_t rand;
+ u_int32_t rnd;
/*
* If the passphrase is empty, use SSH_CIPHER_NONE to ease converting
buffer_init(&buffer);
/* Put checkbytes for checking passphrase validity. */
- rand = arc4random();
- buf[0] = rand & 0xff;
- buf[1] = (rand >> 8) & 0xff;
+ rnd = arc4random();
+ buf[0] = rnd & 0xff;
+ buf[1] = (rnd >> 8) & 0xff;
buf[2] = buf[0];
buf[3] = buf[1];
buffer_append(&buffer, buf, 4);
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd < 0) {
error("open %s failed: %s.", filename, strerror(errno));
+ buffer_free(&encrypted);
return 0;
}
if (write(fd, buffer_ptr(&encrypted), buffer_len(&encrypted)) !=
struct stat st;
char *cp;
int i;
- off_t len;
+ size_t len;
if (fstat(fd, &st) < 0) {
error("fstat for key file %.200s failed: %.100s",
filename, strerror(errno));
return NULL;
}
- len = st.st_size;
+ if (st.st_size > 1*1024*1024) {
+ error("key file %.200s too large", filename);
+ return NULL;
+ }
+ len = (size_t)st.st_size; /* truncated */
buffer_init(&buffer);
cp = buffer_append_space(&buffer, len);
char **commentp)
{
int i, check1, check2, cipher_type;
- off_t len;
+ size_t len;
Buffer buffer, decrypted;
u_char *cp;
CipherContext ciphercontext;
close(fd);
return NULL;
}
- len = st.st_size;
+ if (st.st_size > 1*1024*1024) {
+ error("key file %.200s too large", filename);
+ close(fd);
+ return (NULL);
+ }
+ len = (size_t)st.st_size; /* truncated */
buffer_init(&buffer);
cp = buffer_append_space(&buffer, len);
key_try_load_public(Key *k, const char *filename, char **commentp)
{
FILE *f;
- char line[4096];
+ char line[SSH_MAX_PUBKEY_BYTES];
char *cp;
+ u_long linenum = 0;
f = fopen(filename, "r");
if (f != NULL) {
- while (fgets(line, sizeof(line), f)) {
- line[sizeof(line)-1] = '\0';
+ while (read_keyfile_line(f, filename, line, sizeof(line),
+ &linenum) != -1) {
cp = line;
switch (*cp) {
case '#':