+/* $OpenBSD: auth.h,v 1.63 2009/08/15 18:56:34 fgsch Exp $ */
+
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
- * $OpenBSD: auth.h,v 1.13 2001/03/20 18:57:04 markus Exp $
*/
+
#ifndef AUTH_H
#define AUTH_H
+#include <signal.h>
+
#include <openssl/rsa.h>
#ifdef HAVE_LOGIN_CAP
#ifdef BSD_AUTH
#include <bsd_auth.h>
#endif
+#ifdef KRB5
+#include <krb5.h>
+#endif
typedef struct Authctxt Authctxt;
+typedef struct Authmethod Authmethod;
+typedef struct KbdintDevice KbdintDevice;
+
struct Authctxt {
- int success;
- int postponed;
- int valid;
- int attempt;
- int failures;
- char *user;
- char *service;
- struct passwd *pw;
- char *style;
+ sig_atomic_t success;
+ int authenticated; /* authenticated and alarms cancelled */
+ int postponed; /* authentication needs another step */
+ int valid; /* user exists and is allowed to login */
+ int attempt;
+ int failures;
+ int force_pwchange;
+ char *user; /* username sent by the client */
+ char *service;
+ struct passwd *pw; /* set if 'valid' */
+ char *style;
+ void *kbdintctxt;
+ void *jpake_ctx;
#ifdef BSD_AUTH
- auth_session_t *as;
+ auth_session_t *as;
+#endif
+#ifdef KRB5
+ krb5_context krb5_ctx;
+ krb5_ccache krb5_fwd_ccache;
+ krb5_principal krb5_user;
+ char *krb5_ticket_file;
+ char *krb5_ccname;
#endif
+ Buffer *loginmsg;
+ void *methoddata;
};
-
/*
- * Tries to authenticate the user using the .rhosts file. Returns true if
- * authentication succeeds. If ignore_rhosts is non-zero, this will not
- * consider .rhosts and .shosts (/etc/hosts.equiv will still be used).
+ * Every authentication method has to handle authentication requests for
+ * non-existing users, or for users that are not allowed to login. In this
+ * case 'valid' is set to 0, but 'user' points to the username requested by
+ * the client.
*/
-int auth_rhosts(struct passwd * pw, const char *client_user);
+
+struct Authmethod {
+ char *name;
+ int (*userauth)(Authctxt *authctxt);
+ int *enabled;
+};
/*
- * Tries to authenticate the user using the .rhosts file and the host using
- * its host key. Returns true if authentication succeeds.
+ * Keyboard interactive device:
+ * init_ctx returns: non NULL upon success
+ * query returns: 0 - success, otherwise failure
+ * respond returns: 0 - success, 1 - need further interaction,
+ * otherwise - failure
*/
+struct KbdintDevice
+{
+ const char *name;
+ void* (*init_ctx)(Authctxt*);
+ int (*query)(void *ctx, char **name, char **infotxt,
+ u_int *numprompts, char ***prompts, u_int **echo_on);
+ int (*respond)(void *ctx, u_int numresp, char **responses);
+ void (*free_ctx)(void *ctx);
+};
+
+int auth_rhosts(struct passwd *, const char *);
int
-auth_rhosts_rsa(struct passwd * pw, const char *client_user, RSA* client_host_key);
+auth_rhosts2(struct passwd *, const char *, const char *, const char *);
+
+int auth_rhosts_rsa(Authctxt *, char *, Key *);
+int auth_password(Authctxt *, const char *);
+int auth_rsa(Authctxt *, BIGNUM *);
+int auth_rsa_challenge_dialog(Key *);
+BIGNUM *auth_rsa_generate_challenge(Key *);
+int auth_rsa_verify_response(Key *, BIGNUM *, u_char[]);
+int auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **);
+
+int auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *);
+int hostbased_key_allowed(struct passwd *, const char *, char *, Key *);
+int user_key_allowed(struct passwd *, Key *);
+
+#ifdef KRB5
+int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *);
+int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
+int auth_krb5_password(Authctxt *authctxt, const char *password);
+void krb5_cleanup_proc(Authctxt *authctxt);
+#endif /* KRB5 */
+
+#if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE)
+#include <shadow.h>
+int auth_shadow_acctexpired(struct spwd *);
+int auth_shadow_pwexpired(Authctxt *);
+#endif
-/*
- * Tries to authenticate the user using password. Returns true if
- * authentication succeeds.
- */
-int auth_password(Authctxt *authctxt, const char *password);
+#include "auth-pam.h"
+#include "audit.h"
+void remove_kbdint_device(const char *);
-/*
- * Performs the RSA authentication dialog with the client. This returns 0 if
- * the client could not be authenticated, and 1 if authentication was
- * successful. This may exit if there is a serious protocol violation.
- */
-int auth_rsa(struct passwd * pw, BIGNUM * client_n);
+void disable_forwarding(void);
-/*
- * Parses an RSA key (number of bits, e, n) from a string. Moves the pointer
- * over the key. Skips any whitespace at the beginning and at end.
- */
-int auth_rsa_read_key(char **cpp, u_int *bitsp, BIGNUM * e, BIGNUM * n);
+void do_authentication(Authctxt *);
+void do_authentication2(Authctxt *);
-/*
- * Performs the RSA authentication challenge-response dialog with the client,
- * and returns true (non-zero) if the client gave the correct answer to our
- * challenge; returns zero if the client gives a wrong answer.
- */
-int auth_rsa_challenge_dialog(RSA *pk);
+void auth_log(Authctxt *, int, char *, char *);
+void userauth_finish(Authctxt *, int, char *);
+void userauth_send_banner(const char *);
+int auth_root_allowed(char *);
-#ifdef KRB4
-#include <krb.h>
-/*
- * Performs Kerberos v4 mutual authentication with the client. This returns 0
- * if the client could not be authenticated, and 1 if authentication was
- * successful. This may exit if there is a serious protocol violation.
- */
-int auth_krb4(const char *server_user, KTEXT auth, char **client);
-int krb4_init(uid_t uid);
-void krb4_cleanup_proc(void *ignore);
-int auth_krb4_password(struct passwd * pw, const char *password);
+char *auth2_read_banner(void);
-#ifdef AFS
-#include <kafs.h>
+void privsep_challenge_enable(void);
-/* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */
-int auth_kerberos_tgt(struct passwd * pw, const char *string);
-int auth_afs_token(struct passwd * pw, const char *token_string);
-#endif /* AFS */
+int auth2_challenge(Authctxt *, char *);
+void auth2_challenge_stop(Authctxt *);
+int bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **);
+int bsdauth_respond(void *, u_int, char **);
+int skey_query(void *, char **, char **, u_int *, char ***, u_int **);
+int skey_respond(void *, u_int, char **);
-#endif /* KRB4 */
+void auth2_jpake_get_pwdata(Authctxt *, BIGNUM **, char **, char **);
+void auth2_jpake_stop(Authctxt *);
-#include "auth-pam.h"
-#include "auth2-pam.h"
+int allowed_user(struct passwd *);
+struct passwd * getpwnamallow(const char *user);
+
+char *get_challenge(Authctxt *);
+int verify_response(Authctxt *, const char *);
+void abandon_challenge_response(Authctxt *);
-void do_authentication(void);
-void do_authentication2(void);
+char *authorized_keys_file(struct passwd *);
+char *authorized_keys_file2(struct passwd *);
-Authctxt *authctxt_new(void);
-void auth_log(Authctxt *authctxt, int authenticated, char *method, char *info);
-void userauth_reply(Authctxt *authctxt, int authenticated);
-int auth_root_allowed(char *method);
+FILE *auth_openkeyfile(const char *, struct passwd *, int);
-int auth2_challenge(Authctxt *authctxt, char *devs);
+HostStatus
+check_key_in_hostfiles(struct passwd *, Key *, const char *,
+ const char *, const char *);
-int allowed_user(struct passwd * pw);
+/* hostkey handling */
+Key *get_hostkey_by_index(int);
+Key *get_hostkey_by_type(int);
+int get_hostkey_index(Key *);
+int ssh1_session_key(BIGNUM *);
-char *get_challenge(Authctxt *authctxt, char *devs);
-int verify_response(Authctxt *authctxt, char *response);
+/* debug messages during authentication */
+void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2)));
+void auth_debug_send(void);
+void auth_debug_reset(void);
-struct passwd * auth_get_user(void);
+struct passwd *fakepw(void);
+
+int sys_auth_passwd(Authctxt *, const char *);
-#define AUTH_FAIL_MAX 6
-#define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
#define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
+#define SKEY_PROMPT "\nS/Key Password: "
+
+#if defined(KRB5) && !defined(HEIMDAL)
+#include <krb5.h>
+krb5_error_code ssh_krb5_cc_gen(krb5_context, krb5_ccache *);
+#endif
#endif
andersk / openssh.git / blobdiff