*/
#include "includes.h"
-RCSID("$OpenBSD: auth2.c,v 1.63 2001/06/22 21:55:49 markus Exp $");
+RCSID("$OpenBSD: auth2.c,v 1.79 2001/12/28 12:14:27 markus Exp $");
#include <openssl/evp.h>
#include "misc.h"
#include "hostfile.h"
#include "canohost.h"
-#include "tildexpand.h"
#include "match.h"
/* import */
extern u_char *session_id2;
extern int session_id2_len;
-#ifdef WITH_AIXAUTHENTICATE
-extern char *aixloginmsg;
-#endif
-
static Authctxt *x_authctxt = NULL;
static int one = 1;
/* protocol */
-void input_service_request(int type, int plen, void *ctxt);
-void input_userauth_request(int type, int plen, void *ctxt);
-void protocol_error(int type, int plen, void *ctxt);
+static void input_service_request(int, int, u_int32_t, void *);
+static void input_userauth_request(int, int, u_int32_t, void *);
+static void protocol_error(int, int, u_int32_t, void *);
/* helper */
-Authmethod *authmethod_lookup(const char *name);
-char *authmethods_get(void);
-int user_key_allowed(struct passwd *pw, Key *key);
-int
-hostbased_key_allowed(struct passwd *pw, const char *cuser, char *chost,
- Key *key);
+static Authmethod *authmethod_lookup(const char *);
+static char *authmethods_get(void);
+static int user_key_allowed(struct passwd *, Key *);
+static int hostbased_key_allowed(struct passwd *, const char *, char *, Key *);
/* auth */
-void userauth_banner(void);
-int userauth_none(Authctxt *authctxt);
-int userauth_passwd(Authctxt *authctxt);
-int userauth_pubkey(Authctxt *authctxt);
-int userauth_hostbased(Authctxt *authctxt);
-int userauth_kbdint(Authctxt *authctxt);
+static void userauth_banner(void);
+static int userauth_none(Authctxt *);
+static int userauth_passwd(Authctxt *);
+static int userauth_pubkey(Authctxt *);
+static int userauth_hostbased(Authctxt *);
+static int userauth_kbdint(Authctxt *);
Authmethod authmethods[] = {
{"none",
*/
void
-do_authentication2()
+do_authentication2(void)
{
Authctxt *authctxt = authctxt_new();
x_authctxt = authctxt; /*XXX*/
- /* challenge-reponse is implemented via keyboard interactive */
+ /* challenge-response is implemented via keyboard interactive */
if (options.challenge_response_authentication)
options.kbd_interactive_authentication = 1;
if (options.pam_authentication_via_kbd_int)
do_authenticated(authctxt);
}
-void
-protocol_error(int type, int plen, void *ctxt)
+static void
+protocol_error(int type, int plen, u_int32_t seq, void *ctxt)
{
log("auth: protocol error: type %d plen %d", type, plen);
packet_start(SSH2_MSG_UNIMPLEMENTED);
- packet_put_int(0);
+ packet_put_int(seq);
packet_send();
packet_write_wait();
}
-void
-input_service_request(int type, int plen, void *ctxt)
+static void
+input_service_request(int type, int plen, u_int32_t seq, void *ctxt)
{
Authctxt *authctxt = ctxt;
u_int len;
int accept = 0;
char *service = packet_get_string(&len);
- packet_done();
+ packet_check_eom();
if (authctxt == NULL)
fatal("input_service_request: no authctxt");
xfree(service);
}
-void
-input_userauth_request(int type, int plen, void *ctxt)
+static void
+input_userauth_request(int type, int plen, u_int32_t seq, void *ctxt)
{
Authctxt *authctxt = ctxt;
Authmethod *m = NULL;
authctxt->user, authctxt->service, user, service);
}
/* reset state */
- dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE, &protocol_error);
+ auth2_challenge_stop(authctxt);
authctxt->postponed = 0;
-#ifdef BSD_AUTH
- if (authctxt->as) {
- auth_close(authctxt->as);
- authctxt->as = NULL;
- }
-#endif
/* try to authenticate user */
m = authmethod_lookup(method);
/* now we can break out */
authctxt->success = 1;
} else {
- if (authctxt->failures++ > AUTH_FAIL_MAX)
+ if (authctxt->failures++ > AUTH_FAIL_MAX) {
+#ifdef WITH_AIXAUTHENTICATE
+ loginfailed(authctxt->user,
+ get_canonical_hostname(options.reverse_mapping_check),
+ "ssh");
+#endif /* WITH_AIXAUTHENTICATE */
packet_disconnect(AUTH_FAIL_MSG, authctxt->user);
+ }
methods = authmethods_get();
packet_start(SSH2_MSG_USERAUTH_FAILURE);
packet_put_cstring(methods);
}
}
-void
+static void
userauth_banner(void)
{
struct stat st;
return;
}
-int
+static int
userauth_none(Authctxt *authctxt)
{
/* disable method "none", only allowed one time */
Authmethod *m = authmethod_lookup("none");
if (m != NULL)
m->enabled = NULL;
- packet_done();
+ packet_check_eom();
userauth_banner();
if (authctxt->valid == 0)
return(0);
#ifdef HAVE_CYGWIN
- if (check_nt_auth(1, authctxt->pw->pw_uid) == 0)
+ if (check_nt_auth(1, authctxt->pw) == 0)
return(0);
#endif
#ifdef USE_PAM
#endif /* USE_PAM */
}
-int
+static int
userauth_passwd(Authctxt *authctxt)
{
char *password;
if (change)
log("password change not supported");
password = packet_get_string(&len);
- packet_done();
+ packet_check_eom();
if (authctxt->valid &&
#ifdef HAVE_CYGWIN
- check_nt_auth(1, authctxt->pw->pw_uid) &&
+ check_nt_auth(1, authctxt->pw) &&
#endif
#ifdef USE_PAM
auth_pam_password(authctxt->pw, password) == 1)
return authenticated;
}
-int
+static int
userauth_kbdint(Authctxt *authctxt)
{
int authenticated = 0;
lang = packet_get_string(NULL);
devs = packet_get_string(NULL);
- packet_done();
+ packet_check_eom();
debug("keyboard-interactive devs %s", devs);
xfree(devs);
xfree(lang);
#ifdef HAVE_CYGWIN
- if (check_nt_auth(0, authctxt->pw->pw_uid) == 0)
+ if (check_nt_auth(0, authctxt->pw) == 0)
return(0);
#endif
return authenticated;
}
-int
+static int
userauth_pubkey(Authctxt *authctxt)
{
Buffer b;
if (key != NULL) {
if (have_sig) {
sig = packet_get_string(&slen);
- packet_done();
+ packet_check_eom();
buffer_init(&b);
if (datafellows & SSH_OLD_SESSIONID) {
buffer_append(&b, session_id2, session_id2_len);
xfree(sig);
} else {
debug("test whether pkalg/pkblob are acceptable");
- packet_done();
+ packet_check_eom();
/* XXX fake reply and always send PK_OK ? */
/*
xfree(pkalg);
xfree(pkblob);
#ifdef HAVE_CYGWIN
- if (check_nt_auth(0, authctxt->pw->pw_uid) == 0)
+ if (check_nt_auth(0, authctxt->pw) == 0)
return(0);
#endif
return authenticated;
}
-int
+static int
userauth_hostbased(Authctxt *authctxt)
{
Buffer b;
#define DELIM ","
-char *
+static char *
authmethods_get(void)
{
Authmethod *method = NULL;
return list;
}
-Authmethod *
+static Authmethod *
authmethod_lookup(const char *name)
{
Authmethod *method = NULL;
}
/* return 1 if user allows given key */
-int
+static int
user_key_allowed2(struct passwd *pw, Key *key, char *file)
{
char line[8192];
u_long linenum = 0;
struct stat st;
Key *found;
+ char *fp;
if (pw == NULL)
return 0;
return 0;
}
if (options.strict_modes &&
- secure_filename(f, file, pw->pw_uid, line, sizeof(line)) != 0) {
+ secure_filename(f, file, pw, line, sizeof(line)) != 0) {
fclose(f);
log("Authentication refused: %s", line);
restore_uid();
if (!*cp || *cp == '\n' || *cp == '#')
continue;
- if (key_read(found, &cp) == -1) {
+ if (key_read(found, &cp) != 1) {
/* no key? check if there are options for this key */
int quoted = 0;
debug2("user_key_allowed: check options: '%s'", cp);
/* Skip remaining whitespace. */
for (; *cp == ' ' || *cp == '\t'; cp++)
;
- if (key_read(found, &cp) == -1) {
+ if (key_read(found, &cp) != 1) {
debug2("user_key_allowed: advance: '%s'", cp);
/* still no key? advance to next line*/
continue;
if (key_equal(found, key) &&
auth_parse_options(pw, options, file, linenum) == 1) {
found_key = 1;
- debug("matching key found: file %s, line %ld",
+ debug("matching key found: file %s, line %lu",
file, linenum);
+ fp = key_fingerprint(found, SSH_FP_MD5, SSH_FP_HEX);
+ verbose("Found matching %s key: %s",
+ key_type(found), fp);
+ xfree(fp);
break;
}
}
}
/* check whether given key is in .ssh/authorized_keys* */
-int
+static int
user_key_allowed(struct passwd *pw, Key *key)
{
int success;
}
/* return 1 if given hostkey is allowed */
-int
+static int
hostbased_key_allowed(struct passwd *pw, const char *cuser, char *chost,
Key *key)
{
- Key *found;
const char *resolvedname, *ipaddr, *lookup;
- struct stat st;
- char *user_hostfile;
- int host_status, len;
+ HostStatus host_status;
+ int len;
resolvedname = get_canonical_hostname(options.reverse_mapping_check);
ipaddr = get_remote_ipaddr();
}
debug2("userauth_hostbased: access allowed by auth_rhosts2");
- /* XXX this is copied from auth-rh-rsa.c and should be shared */
- found = key_new(key->type);
- host_status = check_host_in_hostfile(_PATH_SSH_SYSTEM_HOSTFILE2, lookup,
- key, found, NULL);
-
- if (host_status != HOST_OK && !options.ignore_user_known_hosts) {
- user_hostfile = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE2,
- pw->pw_uid);
- if (options.strict_modes &&
- (stat(user_hostfile, &st) == 0) &&
- ((st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
- (st.st_mode & 022) != 0)) {
- log("Hostbased authentication refused for %.100s: "
- "bad owner or modes for %.200s",
- pw->pw_name, user_hostfile);
- } else {
- temporarily_use_uid(pw);
- host_status = check_host_in_hostfile(user_hostfile,
- lookup, key, found, NULL);
- restore_uid();
- }
- xfree(user_hostfile);
- }
- key_free(found);
+ host_status = check_key_in_hostfiles(pw, key, lookup,
+ _PATH_SSH_SYSTEM_HOSTFILE,
+ options.ignore_user_known_hosts ? NULL : _PATH_SSH_USER_HOSTFILE);
+
+ /* backward compat if no key has been found. */
+ if (host_status == HOST_NEW)
+ host_status = check_key_in_hostfiles(pw, key, lookup,
+ _PATH_SSH_SYSTEM_HOSTFILE2,
+ options.ignore_user_known_hosts ? NULL :
+ _PATH_SSH_USER_HOSTFILE2);
- debug2("userauth_hostbased: key %s for %s", host_status == HOST_OK ?
- "ok" : "not found", lookup);
return (host_status == HOST_OK);
}
+
andersk / openssh.git / blobdiff