+/*
+ * Copyright (c) 2000 Markus Friedl. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (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 1.18 2001/06/23 00:20:58 markus Exp $
+ */
#ifndef AUTH_H
#define AUTH_H
+#include "key.h"
+#include "hostfile.h"
+#include <openssl/rsa.h>
+
+#ifdef HAVE_LOGIN_CAP
+#include <login_cap.h>
+#endif
+#ifdef BSD_AUTH
+#include <bsd_auth.h>
+#endif
+
+typedef struct Authctxt Authctxt;
+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;
+ void *kbdintctxt;
+#ifdef BSD_AUTH
+ auth_session_t *as;
+#endif
+};
+
+/*
+ * 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) __P((Authctxt*));
+ int (*query) __P((void *ctx, char **name, char **infotxt,
+ u_int *numprompts, char ***prompts,
+ u_int **echo_on));
+ int (*respond) __P((void *ctx, u_int numresp, char **responses));
+ void (*free_ctx) __P((void *ctx));
+};
+
+/*
+ * 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).
+ */
+int auth_rhosts(struct passwd * pw, const char *client_user);
+
+/* extended interface similar to auth_rhosts() */
+int
+auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname,
+ const char *ipaddr);
+
+/*
+ * Tries to authenticate the user using the .rhosts file and the host using
+ * its host key. Returns true if authentication succeeds.
+ */
+int
+auth_rhosts_rsa(struct passwd * pw, const char *client_user, RSA* client_host_key);
+
+/*
+ * Tries to authenticate the user using password. Returns true if
+ * authentication succeeds.
+ */
+int auth_password(Authctxt *authctxt, const char *password);
+
+/*
+ * 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);
+
+/*
+ * 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);
+
+/*
+ * 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);
+
+#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);
+
+#ifdef AFS
+#include <kafs.h>
+
+/* 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 */
+
+#endif /* KRB4 */
+
+#include "auth-pam.h"
+#include "auth2-pam.h"
+
void do_authentication(void);
+void do_authentication2(void);
+
+Authctxt *authctxt_new(void);
+void auth_log(Authctxt *authctxt, int authenticated, char *method, char *info);
+void userauth_finish(Authctxt *authctxt, int authenticated, char *method);
+int auth_root_allowed(char *method);
+
+int auth2_challenge(Authctxt *authctxt, char *devs);
+
+int allowed_user(struct passwd * pw);
+
+char *get_challenge(Authctxt *authctxt);
+int verify_response(Authctxt *authctxt, const char *response);
+
+struct passwd * auth_get_user(void);
+
+/* expand a filename - return buffer is allocated by xmalloc */
+char *expand_filename(const char *template, struct passwd *pw);
+char *authorized_keys_file(struct passwd *pw);
+char *authorized_keys_file2(struct passwd *pw);
+
+/* check a file and the path to it */
+int
+secure_filename(FILE *f, const char *file, uid_t u, char *err, size_t errlen);
+
+/* helper for hostbased auth */
+HostStatus
+check_key_in_hostfiles(struct passwd *pw, Key *key, const char *host,
+ const char *sysfile, const char *userfile);
+
+#define AUTH_FAIL_MAX 6
+#define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
+#define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
#endif
andersk / openssh.git / blobdiff