Adding upstream version 1:8.4p1.upstream/1%8.4p1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 240 insertions, 0 deletions

diff --git a/auth.h b/auth.h
new file mode 100644
index 0000000..becc672
--- /dev/null
+++ b/auth.h
@@ -0,0 +1,240 @@
+/* $OpenBSD: auth.h,v 1.100 2019/09/06 05:23:55 djm Exp $ */
+
+/*
+ * 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.
+ *
+ */
+
+#ifndef AUTH_H
+#define AUTH_H
+
+#include <signal.h>
+
+#ifdef HAVE_LOGIN_CAP
+#include <login_cap.h>
+#endif
+#ifdef BSD_AUTH
+#include <bsd_auth.h>
+#endif
+#ifdef KRB5
+#include <krb5.h>
+#endif
+
+struct passwd;
+struct ssh;
+struct sshbuf;
+struct sshkey;
+struct sshauthopt;
+
+typedef struct Authctxt Authctxt;
+typedef struct Authmethod Authmethod;
+typedef struct KbdintDevice KbdintDevice;
+
+struct Authctxt {
+	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		 server_caused_failure;
+	int		 force_pwchange;
+	char		*user;		/* username sent by the client */
+	char		*service;
+	struct passwd	*pw;		/* set if 'valid' */
+	char		*style;
+
+	/* Method lists for multiple authentication */
+	char		**auth_methods;	/* modified from server config */
+	u_int		 num_auth_methods;
+
+	/* Authentication method-specific data */
+	void		*methoddata;
+	void		*kbdintctxt;
+#ifdef BSD_AUTH
+	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
+	struct sshbuf	*loginmsg;
+
+	/* Authentication keys already used; these will be refused henceforth */
+	struct sshkey	**prev_keys;
+	u_int		 nprev_keys;
+
+	/* Last used key and ancillary information from active auth method */
+	struct sshkey	*auth_method_key;
+	char		*auth_method_info;
+
+	/* Information exposed to session */
+	struct sshbuf	*session_info;	/* Auth info for environment */
+};
+
+/*
+ * 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.
+ */
+
+struct Authmethod {
+	char	*name;
+	int	(*userauth)(struct ssh *);
+	int	*enabled;
+};
+
+/*
+ * 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_rhosts2(struct passwd *, const char *, const char *, const char *);
+
+int      auth_password(struct ssh *, const char *);
+
+int	 hostbased_key_allowed(struct ssh *, struct passwd *,
+	    const char *, char *, struct sshkey *);
+int	 user_key_allowed(struct ssh *, struct passwd *, struct sshkey *, int,
+    struct sshauthopt **);
+int	 auth2_key_already_used(Authctxt *, const struct sshkey *);
+
+/*
+ * Handling auth method-specific information for logging and prevention
+ * of key reuse during multiple authentication.
+ */
+void	 auth2_authctxt_reset_info(Authctxt *);
+void	 auth2_record_key(Authctxt *, int, const struct sshkey *);
+void	 auth2_record_info(Authctxt *authctxt, const char *, ...)
+	    __attribute__((__format__ (printf, 2, 3)))
+	    __attribute__((__nonnull__ (2)));
+void	 auth2_update_session_info(Authctxt *, const char *, const char *);
+
+#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
+
+#include "auth-pam.h"
+#include "audit.h"
+void remove_kbdint_device(const char *);
+
+void	do_authentication2(struct ssh *);
+
+void	auth_log(struct ssh *, int, int, const char *, const char *);
+void	auth_maxtries_exceeded(struct ssh *) __attribute__((noreturn));
+void	userauth_finish(struct ssh *, int, const char *, const char *);
+int	auth_root_allowed(struct ssh *, const char *);
+
+char	*auth2_read_banner(void);
+int	 auth2_methods_valid(const char *, int);
+int	 auth2_update_methods_lists(Authctxt *, const char *, const char *);
+int	 auth2_setup_methods_lists(Authctxt *);
+int	 auth2_method_allowed(Authctxt *, const char *, const char *);
+
+void	privsep_challenge_enable(void);
+
+int	auth2_challenge(struct ssh *, char *);
+void	auth2_challenge_stop(struct ssh *);
+int	bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **);
+int	bsdauth_respond(void *, u_int, char **);
+
+int	allowed_user(struct ssh *, struct passwd *);
+struct passwd * getpwnamallow(struct ssh *, const char *user);
+
+char	*expand_authorized_keys(const char *, struct passwd *pw);
+char	*authorized_principals_file(struct passwd *);
+
+FILE	*auth_openkeyfile(const char *, struct passwd *, int);
+FILE	*auth_openprincipals(const char *, struct passwd *, int);
+int	 auth_key_is_revoked(struct sshkey *);
+
+const char	*auth_get_canonical_hostname(struct ssh *, int);
+
+HostStatus
+check_key_in_hostfiles(struct passwd *, struct sshkey *, const char *,
+    const char *, const char *);
+
+/* hostkey handling */
+struct sshkey	*get_hostkey_by_index(int);
+struct sshkey	*get_hostkey_public_by_index(int, struct ssh *);
+struct sshkey	*get_hostkey_public_by_type(int, int, struct ssh *);
+struct sshkey	*get_hostkey_private_by_type(int, int, struct ssh *);
+int	 get_hostkey_index(struct sshkey *, int, struct ssh *);
+int	 sshd_hostkey_sign(struct ssh *, struct sshkey *, struct sshkey *,
+    u_char **, size_t *, const u_char *, size_t, const char *);
+
+/* Key / cert options linkage to auth layer */
+const struct sshauthopt *auth_options(struct ssh *);
+int	 auth_activate_options(struct ssh *, struct sshauthopt *);
+void	 auth_restrict_session(struct ssh *);
+int	 auth_authorise_keyopts(struct ssh *, struct passwd *pw,
+    struct sshauthopt *, int, const char *);
+void	 auth_log_authopts(const char *, const struct sshauthopt *, int);
+
+/* debug messages during authentication */
+void	 auth_debug_add(const char *fmt,...)
+    __attribute__((format(printf, 1, 2)));
+void	 auth_debug_send(struct ssh *);
+void	 auth_debug_reset(void);
+
+struct passwd *fakepw(void);
+
+#define	SSH_SUBPROCESS_STDOUT_DISCARD  (1)     /* Discard stdout */
+#define	SSH_SUBPROCESS_STDOUT_CAPTURE  (1<<1)  /* Redirect stdout */
+#define	SSH_SUBPROCESS_STDERR_DISCARD  (1<<2)  /* Discard stderr */
+pid_t	subprocess(const char *, struct passwd *,
+    const char *, int, char **, FILE **, u_int flags);
+
+int	 sys_auth_passwd(struct ssh *, const char *);
+
+#if defined(KRB5) && !defined(HEIMDAL)
+krb5_error_code ssh_krb5_cc_gen(krb5_context, krb5_ccache *);
+#endif
+
+#endif /* AUTH_H */