int
add_host_to_hostfile(const char *filename, const char *host, const Key *key,
int store_hash)
{
FILE *f;
int success = 0;
char *hashed_host = NULL;
if (key == NULL)
return 1; /* XXX ? */
f = fopen(filename, "a");
if (!f)
return 0;
if (store_hash) {
if ((hashed_host = host_hash(host, NULL, 0)) == NULL) {
error("add_host_to_hostfile: host_hash failed");
fclose(f);
return 0;
}
}
fprintf(f, "%s ", store_hash ? hashed_host : host);
if (key_write(key, f)) {
success = 1;
} else {
error("add_host_to_hostfile: saving key in %s failed", filename);
}
fprintf(f, "\n");
fclose(f);
return success;
}
static int
write_host_entry(FILE *f, const char *host, const char *ip,
const struct sshkey *key, int store_hash)
{
int r, success = 0;
char *hashed_host = NULL;
if (store_hash) {
if ((hashed_host = host_hash(host, NULL, 0)) == NULL) {
error("%s: host_hash failed", __func__);
return 0;
}
fprintf(f, "%s ", hashed_host);
} else if (ip != NULL)
fprintf(f, "%s,%s ", host, ip);
else
fprintf(f, "%s ", host);
if ((r = sshkey_write(key, f)) == 0)
success = 1;
else
error("%s: sshkey_write failed: %s", __func__, ssh_err(r));
fputc('\n', f);
return success;
}
int
add_host_to_hostfile(const char *filename, const char *host,
const struct sshkey *key, int store_hash)
{
FILE *f;
int r, success = 0;
char *hashed_host = NULL;
if (key == NULL)
return 1; /* XXX ? */
f = fopen(filename, "a");
if (!f)
return 0;
if (store_hash) {
if ((hashed_host = host_hash(host, NULL, 0)) == NULL) {
error("add_host_to_hostfile: host_hash failed");
fclose(f);
return 0;
}
}
fprintf(f, "%s ", store_hash ? hashed_host : host);
if ((r = sshkey_write(key, f)) != 0) {
error("%s: saving key in %s failed: %s",
__func__, filename, ssh_err(r));
} else
success = 1;
fputs("\n", f);
fclose(f);
return success;
}
static void
keyprint(con *c, Key *key)
{
char *host = c->c_output_name ? c->c_output_name : c->c_name;
if (!key)
return;
if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL)
fatal("host_hash failed");
fprintf(stdout, "%s ", host);
key_write(key, stdout);
fputs("\n", stdout);
}
static void
keyprint_one(char *host, struct sshkey *key)
{
char *hostport;
if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL)
fatal("host_hash failed");
hostport = put_host_port(host, ssh_port);
if (!get_cert)
fprintf(stdout, "%s ", hostport);
sshkey_write(key, stdout);
fputs("\n", stdout);
free(hostport);
}
static int
match_maybe_hashed(const char *host, const char *names, int *was_hashed)
{
int hashed = *names == HASH_DELIM;
const char *hashed_host;
size_t nlen = strlen(names);
if (was_hashed != NULL)
*was_hashed = hashed;
if (hashed) {
if ((hashed_host = host_hash(host, names, nlen)) == NULL)
return -1;
return nlen == strlen(hashed_host) &&
strncmp(hashed_host, names, nlen) == 0;
}
return match_hostname(host, names) == 1;
}
static void
keyprint(con *c, struct sshkey *key)
{
char *host = c->c_output_name ? c->c_output_name : c->c_name;
int r;
if (!key)
return;
if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL)
fatal("host_hash failed");
fprintf(stdout, "%s ", host);
if ((r = sshkey_write(key, stdout)) != 0)
fprintf(stderr, "key_write failed: %s", ssh_err(r));
fputs("\n", stdout);
}
static void
keyprint_one(const char *host, struct sshkey *key)
{
char *hostport;
const char *known_host, *hashed;
found_one = 1;
if (print_sshfp) {
export_dns_rr(host, key, stdout, 0);
return;
}
hostport = put_host_port(host, ssh_port);
lowercase(hostport);
if (hash_hosts && (hashed = host_hash(host, NULL, 0)) == NULL)
fatal("host_hash failed");
known_host = hash_hosts ? hashed : hostport;
if (!get_cert)
fprintf(stdout, "%s ", known_host);
sshkey_write(key, stdout);
fputs("\n", stdout);
free(hostport);
}
void
load_hostkeys(struct hostkeys *hostkeys, const char *host, const char *path)
{
FILE *f;
char line[8192];
u_long linenum = 0, num_loaded = 0;
char *cp, *cp2, *hashed_host;
HostkeyMarker marker;
Key *key;
int kbits;
if ((f = fopen(path, "r")) == NULL)
return;
debug3("%s: loading entries for host \"%.100s\" from file \"%s\"",
__func__, host, path);
while (read_keyfile_line(f, path, line, sizeof(line), &linenum) == 0) {
cp = line;
/* Skip any leading whitespace, comments and empty lines. */
for (; *cp == ' ' || *cp == '\t'; cp++)
;
if (!*cp || *cp == '#' || *cp == '\n')
continue;
if ((marker = check_markers(&cp)) == MRK_ERROR) {
verbose("%s: invalid marker at %s:%lu",
__func__, path, linenum);
continue;
}
/* Find the end of the host name portion. */
for (cp2 = cp; *cp2 && *cp2 != ' ' && *cp2 != '\t'; cp2++)
;
/* Check if the host name matches. */
if (match_hostname(host, cp, (u_int) (cp2 - cp)) != 1) {
if (*cp != HASH_DELIM)
continue;
hashed_host = host_hash(host, cp, (u_int) (cp2 - cp));
if (hashed_host == NULL) {
debug("Invalid hashed host line %lu of %s",
linenum, path);
continue;
}
if (strncmp(hashed_host, cp, (u_int) (cp2 - cp)) != 0)
continue;
}
/* Got a match. Skip host name. */
cp = cp2;
/*
* Extract the key from the line. This will skip any leading
* whitespace. Ignore badly formatted lines.
*/
key = key_new(KEY_UNSPEC);
if (!hostfile_read_key(&cp, &kbits, key)) {
key_free(key);
key = key_new(KEY_RSA1);
if (!hostfile_read_key(&cp, &kbits, key)) {
key_free(key);
continue;
}
}
if (!hostfile_check_key(kbits, key, host, path, linenum))
continue;
debug3("%s: found %skey type %s in file %s:%lu", __func__,
marker == MRK_NONE ? "" :
(marker == MRK_CA ? "ca " : "revoked "),
key_type(key), path, linenum);
hostkeys->entries = xrealloc(hostkeys->entries,
hostkeys->num_entries + 1, sizeof(*hostkeys->entries));
hostkeys->entries[hostkeys->num_entries].host = xstrdup(host);
hostkeys->entries[hostkeys->num_entries].file = xstrdup(path);
hostkeys->entries[hostkeys->num_entries].line = linenum;
hostkeys->entries[hostkeys->num_entries].key = key;
hostkeys->entries[hostkeys->num_entries].marker = marker;
hostkeys->num_entries++;
num_loaded++;
}
debug3("%s: loaded %lu keys", __func__, num_loaded);
fclose(f);
return;
}
static HostStatus
check_host_in_hostfile_by_key_or_type(const char *filename,
const char *host, const Key *key, int keytype, Key *found, int *numret)
{
FILE *f;
char line[8192];
int linenum = 0;
u_int kbits;
char *cp, *cp2, *hashed_host;
HostStatus end_return;
debug3("check_host_in_hostfile: filename %s", filename);
/* Open the file containing the list of known hosts. */
f = fopen(filename, "r");
if (!f)
return HOST_NEW;
/*
* Return value when the loop terminates. This is set to
* HOST_CHANGED if we have seen a different key for the host and have
* not found the proper one.
*/
end_return = HOST_NEW;
/* Go through the file. */
while (fgets(line, sizeof(line), f)) {
cp = line;
linenum++;
/* Skip any leading whitespace, comments and empty lines. */
for (; *cp == ' ' || *cp == '\t'; cp++)
;
if (!*cp || *cp == '#' || *cp == '\n')
continue;
/* Find the end of the host name portion. */
for (cp2 = cp; *cp2 && *cp2 != ' ' && *cp2 != '\t'; cp2++)
;
/* Check if the host name matches. */
if (match_hostname(host, cp, (u_int) (cp2 - cp)) != 1) {
if (*cp != HASH_DELIM)
continue;
hashed_host = host_hash(host, cp, (u_int) (cp2 - cp));
if (hashed_host == NULL) {
debug("Invalid hashed host line %d of %s",
linenum, filename);
continue;
}
if (strncmp(hashed_host, cp, (u_int) (cp2 - cp)) != 0)
continue;
}
/* Got a match. Skip host name. */
cp = cp2;
/*
* Extract the key from the line. This will skip any leading
* whitespace. Ignore badly formatted lines.
*/
if (!hostfile_read_key(&cp, &kbits, found))
continue;
if (numret != NULL)
*numret = linenum;
if (key == NULL) {
/* we found a key of the requested type */
if (found->type == keytype)
return HOST_FOUND;
continue;
}
if (!hostfile_check_key(kbits, found, host, filename, linenum))
continue;
/* Check if the current key is the same as the given key. */
if (key_equal(key, found)) {
/* Ok, they match. */
debug3("check_host_in_hostfile: match line %d", linenum);
fclose(f);
return HOST_OK;
}
/*
* They do not match. We will continue to go through the
* file; however, we note that we will not return that it is
* new.
*/
end_return = HOST_CHANGED;
}
/* Clear variables and close the file. */
fclose(f);
/*
* Return either HOST_NEW or HOST_CHANGED, depending on whether we
* saw a different key for the host.
*/
return end_return;
}
