--- old/usr/src/cmd/ssh/sshd/auth1.c	2016-08-16 20:42:22.604027776 -0400
+++ /dev/null	2016-08-16 20:42:22.000000000 -0400
@@ -1,466 +0,0 @@
-/*
- * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- *                    All rights reserved
- *
- * As far as I am concerned, the code I have written for this software
- * can be used freely for any purpose.  Any derived versions of this
- * software must be clearly marked as such, and if the derived work is
- * incompatible with the protocol description in the RFC file, it must be
- * called by a name other than "ssh" or "Secure Shell".
- */
-/*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-
-#include "includes.h"
-RCSID("$OpenBSD: auth1.c,v 1.44 2002/09/26 11:38:43 markus Exp $");
-
-#include "xmalloc.h"
-#include "rsa.h"
-#include "ssh1.h"
-#include "packet.h"
-#include "buffer.h"
-#include "mpaux.h"
-#include "log.h"
-#include "servconf.h"
-#include "compat.h"
-#include "auth.h"
-#include "channels.h"
-#include "session.h"
-#include "uidswap.h"
-
-#ifdef HAVE_BSM
-#include "bsmaudit.h"
-extern adt_session_data_t *ah;
-#endif /* HAVE_BSM */
-
-/* import */
-extern ServerOptions options;
-
-/*
- * convert ssh auth msg type into description
- */
-static char *
-get_authname(int type)
-{
-	static char buf[1024];
-	switch (type) {
-	case SSH_CMSG_AUTH_PASSWORD:
-		return "password";
-	case SSH_CMSG_AUTH_RSA:
-		return "rsa";
-	case SSH_CMSG_AUTH_RHOSTS_RSA:
-		return "rhosts-rsa";
-	case SSH_CMSG_AUTH_RHOSTS:
-		return "rhosts";
-	case SSH_CMSG_AUTH_TIS:
-	case SSH_CMSG_AUTH_TIS_RESPONSE:
-		return "challenge-response";
-#if defined(KRB4) || defined(KRB5)
-	case SSH_CMSG_AUTH_KERBEROS:
-		return "kerberos";
-#endif
-	}
-	snprintf(buf, sizeof buf, "bad-auth-msg-%d", type);
-	return buf;
-}
-
-/*
- * read packets, try to authenticate the user and
- * return only if authentication is successful
- */
-static void
-do_authloop(Authctxt *authctxt)
-{
-	int authenticated = 0;
-	u_int bits;
-	Key *client_host_key;
-	BIGNUM *n;
-	char *client_user, *password;
-	char info[1024];
-	u_int dlen;
-	u_int ulen;
-	int type = 0;
-	struct passwd *pw = authctxt->pw;
-
-	debug("Attempting authentication for %s%.100s.",
-	    authctxt->valid ? "" : "illegal user ", authctxt->user);
-
-	/* If the user has no password, accept authentication immediately. */
-	if (options.password_authentication &&
-#if defined(KRB4) || defined(KRB5)
-	    (!options.kerberos_authentication || options.kerberos_or_local_passwd) &&
-#endif
-	    auth_password(authctxt, "")) {
-		auth_log(authctxt, 1, "without authentication", "");
-		return;
-	}
-
-	/* Indicate that authentication is needed. */
-	packet_start(SSH_SMSG_FAILURE);
-	packet_send();
-	packet_write_wait();
-
-	client_user = NULL;
-
-	for ( ;; ) {
-		/* default to fail */
-		authenticated = 0;
-
-		info[0] = '\0';
-
-		/* Get a packet from the client. */
-		authctxt->v1_auth_type = type = packet_read();
-		authctxt->v1_auth_name = get_authname(type);
-
-		authctxt->attempt++;
-
-		/* Process the packet. */
-		switch (type) {
-
-#if defined(KRB4) || defined(KRB5)
-		case SSH_CMSG_AUTH_KERBEROS:
-			if (!options.kerberos_authentication) {
-				verbose("Kerberos authentication disabled.");
-			} else {
-				char *kdata = packet_get_string(&dlen);
-				packet_check_eom();
-
-				if (kdata[0] == 4) { /* KRB_PROT_VERSION */
-#ifdef KRB4
-					KTEXT_ST tkt, reply;
-					tkt.length = dlen;
-					if (tkt.length < MAX_KTXT_LEN)
-						memcpy(tkt.dat, kdata, tkt.length);
-
-					if (auth_krb4(authctxt, &tkt,
-					    &client_user, &reply)) {
-						authenticated = 1;
-						snprintf(info, sizeof(info),
-						    " tktuser %.100s",
-						    client_user);
-
-						packet_start(
-						    SSH_SMSG_AUTH_KERBEROS_RESPONSE);
-						packet_put_string((char *)
-						    reply.dat, reply.length);
-						packet_send();
-						packet_write_wait();
-					}
-#endif /* KRB4 */
-				} else {
-#ifdef KRB5
-					krb5_data tkt, reply;
-					tkt.length = dlen;
-					tkt.data = kdata;
-
-					if (auth_krb5(authctxt, &tkt,
-					    &client_user, &reply)) {
-						authenticated = 1;
-						snprintf(info, sizeof(info),
-						    " tktuser %.100s",
-						    client_user);
- 
- 						/* Send response to client */
- 						packet_start(
-						    SSH_SMSG_AUTH_KERBEROS_RESPONSE);
- 						packet_put_string((char *)
-						    reply.data, reply.length);
- 						packet_send();
- 						packet_write_wait();
-
- 						if (reply.length)
- 							xfree(reply.data);
-					}
-#endif /* KRB5 */
-				}
-				xfree(kdata);
-			}
-			break;
-#endif /* KRB4 || KRB5 */
-
-#if defined(AFS) || defined(KRB5)
-			/* XXX - punt on backward compatibility here. */
-		case SSH_CMSG_HAVE_KERBEROS_TGT:
-			packet_send_debug("Kerberos TGT passing disabled before authentication.");
-			break;
-#ifdef AFS
-		case SSH_CMSG_HAVE_AFS_TOKEN:
-			packet_send_debug("AFS token passing disabled before authentication.");
-			break;
-#endif /* AFS */
-#endif /* AFS || KRB5 */
-
-		case SSH_CMSG_AUTH_RHOSTS:
-			if (!options.rhosts_authentication) {
-				verbose("Rhosts authentication disabled.");
-				break;
-			}
-			/*
-			 * Get client user name.  Note that we just have to
-			 * trust the client; this is one reason why rhosts
-			 * authentication is insecure. (Another is
-			 * IP-spoofing on a local network.)
-			 */
-			client_user = packet_get_string(&ulen);
-			packet_check_eom();
-
-			/* Try to authenticate using /etc/hosts.equiv and .rhosts. */
-			authenticated = auth_rhosts(pw, client_user);
-
-			snprintf(info, sizeof info, " ruser %.100s", client_user);
-			break;
-
-		case SSH_CMSG_AUTH_RHOSTS_RSA:
-			if (!options.rhosts_rsa_authentication) {
-				verbose("Rhosts with RSA authentication disabled.");
-				break;
-			}
-			/*
-			 * Get client user name.  Note that we just have to
-			 * trust the client; root on the client machine can
-			 * claim to be any user.
-			 */
-			client_user = packet_get_string(&ulen);
-
-			/* Get the client host key. */
-			client_host_key = key_new(KEY_RSA1);
-			bits = packet_get_int();
-			packet_get_bignum(client_host_key->rsa->e);
-			packet_get_bignum(client_host_key->rsa->n);
-
-			if (bits != BN_num_bits(client_host_key->rsa->n))
-				verbose("Warning: keysize mismatch for client_host_key: "
-				    "actual %d, announced %d",
-				    BN_num_bits(client_host_key->rsa->n), bits);
-			packet_check_eom();
-
-			authenticated = auth_rhosts_rsa(pw, client_user,
-			    client_host_key);
-			key_free(client_host_key);
-
-			snprintf(info, sizeof info, " ruser %.100s", client_user);
-			break;
-
-		case SSH_CMSG_AUTH_RSA:
-			if (!options.rsa_authentication) {
-				verbose("RSA authentication disabled.");
-				break;
-			}
-			/* RSA authentication requested. */
-			if ((n = BN_new()) == NULL)
-				fatal("do_authloop: BN_new failed");
-			packet_get_bignum(n);
-			packet_check_eom();
-			authenticated = auth_rsa(pw, n);
-			BN_clear_free(n);
-			break;
-
-		case SSH_CMSG_AUTH_PASSWORD:
-			authctxt->init_attempt++;
-
-			if (!options.password_authentication) {
-				verbose("Password authentication disabled.");
-				break;
-			}
-			/*
-			 * Read user password.  It is in plain text, but was
-			 * transmitted over the encrypted channel so it is
-			 * not visible to an outside observer.
-			 */
-			password = packet_get_string(&dlen);
-			packet_check_eom();
-
-			/* Try authentication with the password. */
-			if (authctxt->init_failures <
-				options.max_init_auth_tries)
-				authenticated =
-				    auth_password(authctxt, password);
-
-			memset(password, 0, strlen(password));
-			xfree(password);
-			break;
-
-		case SSH_CMSG_AUTH_TIS:
-			debug("rcvd SSH_CMSG_AUTH_TIS");
-			if (options.challenge_response_authentication == 1) {
-				char *challenge = get_challenge(authctxt);
-				if (challenge != NULL) {
-					debug("sending challenge '%s'", challenge);
-					packet_start(SSH_SMSG_AUTH_TIS_CHALLENGE);
-					packet_put_cstring(challenge);
-					xfree(challenge);
-					packet_send();
-					packet_write_wait();
-					continue;
-				}
-			}
-			break;
-		case SSH_CMSG_AUTH_TIS_RESPONSE:
-			debug("rcvd SSH_CMSG_AUTH_TIS_RESPONSE");
-			if (options.challenge_response_authentication == 1) {
-				char *response = packet_get_string(&dlen);
-				debug("got response '%s'", response);
-				packet_check_eom();
-				authenticated = verify_response(authctxt, response);
-				memset(response, 'r', dlen);
-				xfree(response);
-			}
-			break;
-
-		default:
-			/*
-			 * Any unknown messages will be ignored (and failure
-			 * returned) during authentication.
-			 */
-			log("Unknown message during authentication: type %d", type);
-			break;
-		}
-#ifdef BSD_AUTH
-		if (authctxt->as) {
-			auth_close(authctxt->as);
-			authctxt->as = NULL;
-		}
-#endif
-		if (!authctxt->valid && authenticated) {
-			authenticated = 0;
-			log("Ignoring authenticated invalid user %s",
-			    authctxt->user);
-		}
-
-#ifdef _UNICOS
-		if (type == SSH_CMSG_AUTH_PASSWORD && !authenticated)
-			cray_login_failure(authctxt->user, IA_UDBERR);
-		if (authenticated && cray_access_denied(authctxt->user)) {
-			authenticated = 0;
-			fatal("Access denied for user %s.",authctxt->user);
-		}
-#endif /* _UNICOS */
-
-#ifdef HAVE_CYGWIN
-		if (authenticated &&
-		    !check_nt_auth(type == SSH_CMSG_AUTH_PASSWORD, pw)) {
-			packet_disconnect("Authentication rejected for uid %d.",
-			pw == NULL ? -1 : pw->pw_uid);
-			authenticated = 0;
-		}
-#else
-		/* Special handling for root */
-		if (authenticated && authctxt->pw->pw_uid == 0 &&
-		    !auth_root_allowed(get_authname(type)))
-			authenticated = 0;
-#endif
-#ifdef USE_PAM
-		if (authenticated && type != SSH_CMSG_AUTH_PASSWORD)
-			authenticated = do_pam_non_initial_userauth(authctxt);
-		else if (authenticated && !AUTHPAM_DONE(authctxt))
-			authenticated = 0;
-
-		if (!authenticated)
-			authctxt->pam_retval = AUTHPAM_ERROR(authctxt,
-				PAM_PERM_DENIED);
-#endif /* USE_PAM */
-
-		/* Log before sending the reply */
-		auth_log(authctxt, authenticated, get_authname(type), info);
-
-		if (client_user != NULL) {
-			xfree(client_user);
-			client_user = NULL;
-		}
-
-		if (authenticated)
-			return;
-
-		if (type == SSH_CMSG_AUTH_PASSWORD)
-			authctxt->init_failures++;
-
-		if (authctxt->failures++ > options.max_auth_tries) {
-#ifdef HAVE_BSM
-			fatal_remove_cleanup(audit_failed_login_cleanup,
-				authctxt);
-			audit_sshd_login_failure(&ah, PAM_MAXTRIES,
-			    authctxt->user);
-#endif /* HAVE_BSM */
-			packet_disconnect(AUTH_FAIL_MSG, authctxt->user);
-		}
-
-		packet_start(SSH_SMSG_FAILURE);
-		packet_send();
-		packet_write_wait();
-	}
-}
-
-/*
- * Performs authentication of an incoming connection.  Session key has already
- * been exchanged and encryption is enabled.
- */
-Authctxt *
-do_authentication(void)
-{
-	Authctxt *authctxt;
-	u_int ulen;
-	char *user, *style = NULL;
-
-	/* Get the name of the user that we wish to log in as. */
-	packet_read_expect(SSH_CMSG_USER);
-
-	/* Get the user name. */
-	user = packet_get_string(&ulen);
-	packet_check_eom();
-
-	if ((style = strchr(user, ':')) != NULL)
-		*style++ = '\0';
-
-#ifdef KRB5
-	/* XXX - SSH.com Kerberos v5 braindeath. */
-	if ((datafellows & SSH_BUG_K5USER) &&
-	    options.kerberos_authentication) {
-		char *p;
-		if ((p = strchr(user, '@')) != NULL)
-			*p = '\0';
-	}
-#endif
-
-	authctxt = authctxt_new();
-	authctxt->user = user;
-	authctxt->style = style;
-
-#ifdef HAVE_BSM
-	fatal_add_cleanup(audit_failed_login_cleanup, authctxt);
-#endif /* HAVE_BSM */
-
-	/* Verify that the user is a valid user. */
-	if ((authctxt->pw = getpwnamallow(user)) != NULL) {
-		authctxt->valid = 1;
-	} else {
-		authctxt->valid = 0;
-		debug("do_authentication: illegal user %s", user);
-	}
-
-	setproctitle("%s", authctxt->pw ? user : "unknown");
-
-	/*
-	 * If we are not running as root, the user must have the same uid as
-	 * the server. (Unless you are running Windows)
-	 */
-#ifndef HAVE_CYGWIN
-	if (getuid() != 0 && authctxt->pw &&
-	    authctxt->pw->pw_uid != getuid())
-		packet_disconnect("Cannot change user when server not running as root.");
-#endif
-
-	/*
-	 * Loop until the user has been authenticated or the connection is
-	 * closed, do_authloop() returns only if authentication is successful
-	 */
-	do_authloop(authctxt);
-
-	/* The user has been authenticated and accepted. */
-	packet_start(SSH_SMSG_SUCCESS);
-	packet_send();
-	packet_write_wait();
-
-	return (authctxt);
-}
