X-Git-Url: http://andersk.mit.edu/gitweb/gssapi-openssh.git/blobdiff_plain/510132b69d4fdceca750f6de39b2be84c49006c8..8d212d56428a6f99849ad239d25a7a0995ca59d8:/openssh/monitor_wrap.c

diff --git a/openssh/monitor_wrap.c b/openssh/monitor_wrap.c
index c5e3fb9..6366075 100644
--- a/openssh/monitor_wrap.c
+++ b/openssh/monitor_wrap.c
@@ -1,3 +1,4 @@
+/* $OpenBSD: monitor_wrap.c,v 1.54 2006/08/12 20:46:46 miod Exp $ */
 /*
  * Copyright 2002 Niels Provos <provos@citi.umich.edu>
  * Copyright 2002 Markus Friedl <markus@openbsd.org>
@@ -25,29 +26,51 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: monitor_wrap.c,v 1.7 2002/05/15 15:47:49 mouring Exp $");
+
+#include <sys/types.h>
+#include <sys/uio.h>
+
+#include <errno.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
 
 #include <openssl/bn.h>
 #include <openssl/dh.h>
 
+#include "xmalloc.h"
 #include "ssh.h"
 #include "dh.h"
+#include "buffer.h"
+#include "key.h"
+#include "cipher.h"
 #include "kex.h"
+#include "hostfile.h"
 #include "auth.h"
-#include "buffer.h"
-#include "bufaux.h"
+#include "auth-options.h"
 #include "packet.h"
 #include "mac.h"
 #include "log.h"
+#ifdef TARGET_OS_MAC    /* XXX Broken krb5 headers on Mac */
+#undef TARGET_OS_MAC
+#include "zlib.h"
+#define TARGET_OS_MAC 1
+#else
 #include "zlib.h"
+#endif
 #include "monitor.h"
+#ifdef GSSAPI
+#include "ssh-gss.h"
+#endif
 #include "monitor_wrap.h"
-#include "xmalloc.h"
 #include "atomicio.h"
 #include "monitor_fdpass.h"
-#include "getput.h"
+#include "misc.h"
+#include "servconf.h"
 
-#include "auth.h"
 #include "channels.h"
 #include "session.h"
 
@@ -58,59 +81,68 @@ extern z_stream incoming_stream;
 extern z_stream outgoing_stream;
 extern struct monitor *pmonitor;
 extern Buffer input, output;
+extern Buffer loginmsg;
+extern ServerOptions options;
+
+int
+mm_is_monitor(void)
+{
+	/*
+	 * m_pid is only set in the privileged part, and
+	 * points to the unprivileged child.
+	 */
+	return (pmonitor && pmonitor->m_pid > 0);
+}
 
 void
-mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
+mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
 {
-	u_char buf[5];
 	u_int mlen = buffer_len(m);
+	u_char buf[5];
 
-	debug3("%s entering: type %d", __FUNCTION__, type);
+	debug3("%s entering: type %d", __func__, type);
 
-	PUT_32BIT(buf, mlen + 1);
-	buf[4] = (u_char) type;         /* 1st byte of payload is mesg-type */
-	if (atomicio(write, socket, buf, sizeof(buf)) != sizeof(buf))
-		fatal("%s: write", __FUNCTION__);
-	if (atomicio(write, socket, buffer_ptr(m), mlen) != mlen)
-		fatal("%s: write", __FUNCTION__);
+	put_u32(buf, mlen + 1);
+	buf[4] = (u_char) type;		/* 1st byte of payload is mesg-type */
+	if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
+		fatal("%s: write: %s", __func__, strerror(errno));
+	if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
+		fatal("%s: write: %s", __func__, strerror(errno));
 }
 
 void
-mm_request_receive(int socket, Buffer *m)
+mm_request_receive(int sock, Buffer *m)
 {
 	u_char buf[4];
-	ssize_t res;
 	u_int msg_len;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
-	res = atomicio(read, socket, buf, sizeof(buf));
-	if (res != sizeof(buf)) {
-		if (res == 0)
-			fatal_cleanup();
-		fatal("%s: read: %ld", __FUNCTION__, (long)res);
+	if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
+		if (errno == EPIPE)
+			cleanup_exit(255);
+		fatal("%s: read: %s", __func__, strerror(errno));
 	}
-	msg_len = GET_32BIT(buf);
+	msg_len = get_u32(buf);
 	if (msg_len > 256 * 1024)
-		fatal("%s: read: bad msg_len %d", __FUNCTION__, msg_len);
+		fatal("%s: read: bad msg_len %d", __func__, msg_len);
 	buffer_clear(m);
 	buffer_append_space(m, msg_len);
-	res = atomicio(read, socket, buffer_ptr(m), msg_len);
-	if (res != msg_len)
-		fatal("%s: read: %ld != msg_len", __FUNCTION__, (long)res);
+	if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
+		fatal("%s: read: %s", __func__, strerror(errno));
 }
 
 void
-mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m)
+mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
 {
 	u_char rtype;
 
-	debug3("%s entering: type %d", __FUNCTION__, type);
+	debug3("%s entering: type %d", __func__, type);
 
-	mm_request_receive(socket, m);
+	mm_request_receive(sock, m);
 	rtype = buffer_get_char(m);
 	if (rtype != type)
-		fatal("%s: read: rtype %d != type %d", __FUNCTION__,
+		fatal("%s: read: rtype %d != type %d", __func__,
 		    rtype, type);
 }
 
@@ -128,21 +160,21 @@ mm_choose_dh(int min, int nbits, int max)
 
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
 
-	debug3("%s: waiting for MONITOR_ANS_MODULI", __FUNCTION__);
+	debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
 	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
 
 	success = buffer_get_char(&m);
 	if (success == 0)
-		fatal("%s: MONITOR_ANS_MODULI failed", __FUNCTION__);
+		fatal("%s: MONITOR_ANS_MODULI failed", __func__);
 
 	if ((p = BN_new()) == NULL)
-		fatal("%s: BN_new failed", __FUNCTION__);
+		fatal("%s: BN_new failed", __func__);
 	if ((g = BN_new()) == NULL)
-		fatal("%s: BN_new failed", __FUNCTION__);
+		fatal("%s: BN_new failed", __func__);
 	buffer_get_bignum2(&m, p);
 	buffer_get_bignum2(&m, g);
 
-	debug3("%s: remaining %d", __FUNCTION__, buffer_len(&m));
+	debug3("%s: remaining %d", __func__, buffer_len(&m));
 	buffer_free(&m);
 
 	return (dh_new_group(g, p));
@@ -154,7 +186,7 @@ mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
 	Kex *kex = *pmonitor->m_pkex;
 	Buffer m;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	buffer_init(&m);
 	buffer_put_int(&m, kex->host_key_index(key));
@@ -162,7 +194,7 @@ mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
 
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
 
-	debug3("%s: waiting for MONITOR_ANS_SIGN", __FUNCTION__);
+	debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
 	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
 	*sigp  = buffer_get_string(&m, lenp);
 	buffer_free(&m);
@@ -171,20 +203,20 @@ mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
 }
 
 struct passwd *
-mm_getpwnamallow(const char *login)
+mm_getpwnamallow(const char *username)
 {
 	Buffer m;
 	struct passwd *pw;
 	u_int pwlen;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	buffer_init(&m);
-	buffer_put_cstring(&m, login);
+	buffer_put_cstring(&m, username);
 
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
 
-	debug3("%s: waiting for MONITOR_ANS_PWNAM", __FUNCTION__);
+	debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
 	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
 
 	if (buffer_get_char(&m) == 0) {
@@ -193,7 +225,7 @@ mm_getpwnamallow(const char *login)
 	}
 	pw = buffer_get_string(&m, &pwlen);
 	if (pwlen != sizeof(struct passwd))
-		fatal("%s: struct passwd size mismatch", __FUNCTION__);
+		fatal("%s: struct passwd size mismatch", __func__);
 	pw->pw_name = buffer_get_string(&m, NULL);
 	pw->pw_passwd = buffer_get_string(&m, NULL);
 	pw->pw_gecos = buffer_get_string(&m, NULL);
@@ -207,21 +239,28 @@ mm_getpwnamallow(const char *login)
 	return (pw);
 }
 
-char* mm_auth2_read_banner(void)
+char *
+mm_auth2_read_banner(void)
 {
 	Buffer m;
 	char *banner;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	buffer_init(&m);
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
 	buffer_clear(&m);
 
-	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTH2_READ_BANNER, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd,
+	    MONITOR_ANS_AUTH2_READ_BANNER, &m);
 	banner = buffer_get_string(&m, NULL);
 	buffer_free(&m);
-	
+
+	/* treat empty banner as missing banner */
+	if (strlen(banner) == 0) {
+		xfree(banner);
+		banner = NULL;
+	}
 	return (banner);
 }
 
@@ -232,7 +271,7 @@ mm_inform_authserv(char *service, char *style)
 {
 	Buffer m;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	buffer_init(&m);
 	buffer_put_cstring(&m, service);
@@ -250,13 +289,13 @@ mm_auth_password(Authctxt *authctxt, char *password)
 	Buffer m;
 	int authenticated = 0;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	buffer_init(&m);
 	buffer_put_cstring(&m, password);
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
 
-	debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __FUNCTION__);
+	debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
 	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
 
 	authenticated = buffer_get_int(&m);
@@ -264,7 +303,7 @@ mm_auth_password(Authctxt *authctxt, char *password)
 	buffer_free(&m);
 
 	debug3("%s: user %sauthenticated",
-	    __FUNCTION__, authenticated ? "" : "not ");
+	    __func__, authenticated ? "" : "not ");
 	return (authenticated);
 }
 
@@ -300,7 +339,7 @@ mm_send_debug(Buffer *m)
 
 	while (buffer_len(m)) {
 		msg = buffer_get_string(m, NULL);
-		debug3("%s: Sending debug: %s", __FUNCTION__, msg);
+		debug3("%s: Sending debug: %s", __func__, msg);
 		packet_send_debug("%s", msg);
 		xfree(msg);
 	}
@@ -312,9 +351,9 @@ mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
 	Buffer m;
 	u_char *blob;
 	u_int len;
-	int allowed = 0;
+	int allowed = 0, have_forced = 0;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	/* Convert the key to a blob and the pass it over */
 	if (!key_to_blob(key, &blob, &len))
@@ -329,11 +368,16 @@ mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
 
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
 
-	debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __FUNCTION__);
+	debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
 	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
 
 	allowed = buffer_get_int(&m);
 
+	/* fake forced command */
+	auth_clear_options();
+	have_forced = buffer_get_int(&m);
+	forced_command = have_forced ? xstrdup("true") : NULL;
+
 	/* Send potential debug messages */
 	mm_send_debug(&m);
 
@@ -356,7 +400,7 @@ mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
 	u_int len;
 	int verified = 0;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	/* Convert the key to a blob and the pass it over */
 	if (!key_to_blob(key, &blob, &len))
@@ -370,7 +414,7 @@ mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
 
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
 
-	debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __FUNCTION__);
+	debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
 	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
 
 	verified = buffer_get_int(&m);
@@ -391,7 +435,7 @@ mm_newkeys_from_blob(u_char *blob, int blen)
 	Mac *mac;
 	Comp *comp;
 
-	debug3("%s: %p(%d)", __FUNCTION__, blob, blen);
+	debug3("%s: %p(%d)", __func__, blob, blen);
 #ifdef DEBUG_PK
 	dump_base64(stderr, blob, blen);
 #endif
@@ -411,21 +455,21 @@ mm_newkeys_from_blob(u_char *blob, int blen)
 	enc->key = buffer_get_string(&b, &enc->key_len);
 	enc->iv = buffer_get_string(&b, &len);
 	if (len != enc->block_size)
-		fatal("%s: bad ivlen: expected %d != %d", __FUNCTION__,
+		fatal("%s: bad ivlen: expected %u != %u", __func__,
 		    enc->block_size, len);
 
 	if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
-		fatal("%s: bad cipher name %s or pointer %p", __FUNCTION__,
+		fatal("%s: bad cipher name %s or pointer %p", __func__,
 		    enc->name, enc->cipher);
 
 	/* Mac structure */
 	mac->name = buffer_get_string(&b, NULL);
 	if (mac->name == NULL || mac_init(mac, mac->name) == -1)
-		fatal("%s: can not init mac %s", __FUNCTION__, mac->name);
+		fatal("%s: can not init mac %s", __func__, mac->name);
 	mac->enabled = buffer_get_int(&b);
 	mac->key = buffer_get_string(&b, &len);
 	if (len > mac->key_len)
-		fatal("%s: bad mac key lenght: %d > %d", __FUNCTION__, len,
+		fatal("%s: bad mac key length: %u > %d", __func__, len,
 		    mac->key_len);
 	mac->key_len = len;
 
@@ -436,7 +480,7 @@ mm_newkeys_from_blob(u_char *blob, int blen)
 
 	len = buffer_len(&b);
 	if (len != 0)
-		error("newkeys_from_blob: remaining bytes in blob %d", len);
+		error("newkeys_from_blob: remaining bytes in blob %u", len);
 	buffer_free(&b);
 	return (newkey);
 }
@@ -446,16 +490,15 @@ mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
 {
 	Buffer b;
 	int len;
-	u_char *buf;
 	Enc *enc;
 	Mac *mac;
 	Comp *comp;
 	Newkeys *newkey = newkeys[mode];
 
-	debug3("%s: converting %p", __FUNCTION__, newkey);
+	debug3("%s: converting %p", __func__, newkey);
 
 	if (newkey == NULL) {
-		error("%s: newkey == NULL", __FUNCTION__);
+		error("%s: newkey == NULL", __func__);
 		return 0;
 	}
 	enc = &newkey->enc;
@@ -484,14 +527,14 @@ mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
 	buffer_put_cstring(&b, comp->name);
 
 	len = buffer_len(&b);
-	buf = xmalloc(len);
-	memcpy(buf, buffer_ptr(&b), len);
-	memset(buffer_ptr(&b), 0, len);
-	buffer_free(&b);
 	if (lenp != NULL)
 		*lenp = len;
-	if (blobp != NULL)
-		*blobp = buf;
+	if (blobp != NULL) {
+		*blobp = xmalloc(len);
+		memcpy(*blobp, buffer_ptr(&b), len);
+	}
+	memset(buffer_ptr(&b), 0, len);
+	buffer_free(&b);
 	return len;
 }
 
@@ -510,23 +553,33 @@ mm_send_kex(Buffer *m, Kex *kex)
 }
 
 void
-mm_send_keystate(struct monitor *pmonitor)
+mm_send_keystate(struct monitor *monitor)
 {
 	Buffer m;
 	u_char *blob, *p;
 	u_int bloblen, plen;
+	u_int32_t seqnr, packets;
+	u_int64_t blocks;
 
 	buffer_init(&m);
 
 	if (!compat20) {
 		u_char iv[24];
-		int ivlen;
+		u_char *key;
+		u_int ivlen, keylen;
 
 		buffer_put_int(&m, packet_get_protocol_flags());
 
 		buffer_put_int(&m, packet_get_ssh1_cipher());
 
-		debug3("%s: Sending ssh1 IV", __FUNCTION__);
+		debug3("%s: Sending ssh1 KEY+IV", __func__);
+		keylen = packet_get_encryption_key(NULL);
+		key = xmalloc(keylen+1);	/* add 1 if keylen == 0 */
+		keylen = packet_get_encryption_key(key);
+		buffer_put_string(&m, key, keylen);
+		memset(key, 0, keylen);
+		xfree(key);
+
 		ivlen = packet_get_keyiv_len(MODE_OUT);
 		packet_get_keyiv(MODE_OUT, iv, ivlen);
 		buffer_put_string(&m, iv, ivlen);
@@ -536,29 +589,35 @@ mm_send_keystate(struct monitor *pmonitor)
 		goto skip;
 	} else {
 		/* Kex for rekeying */
-		mm_send_kex(&m, *pmonitor->m_pkex);
+		mm_send_kex(&m, *monitor->m_pkex);
 	}
 
 	debug3("%s: Sending new keys: %p %p",
-	    __FUNCTION__, newkeys[MODE_OUT], newkeys[MODE_IN]);
+	    __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
 
 	/* Keys from Kex */
 	if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
-		fatal("%s: conversion of newkeys failed", __FUNCTION__);
+		fatal("%s: conversion of newkeys failed", __func__);
 
 	buffer_put_string(&m, blob, bloblen);
 	xfree(blob);
 
 	if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
-		fatal("%s: conversion of newkeys failed", __FUNCTION__);
+		fatal("%s: conversion of newkeys failed", __func__);
 
 	buffer_put_string(&m, blob, bloblen);
 	xfree(blob);
 
-	buffer_put_int(&m, packet_get_seqnr(MODE_OUT));
-	buffer_put_int(&m, packet_get_seqnr(MODE_IN));
+	packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
+	buffer_put_int(&m, seqnr);
+	buffer_put_int64(&m, blocks);
+	buffer_put_int(&m, packets);
+	packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
+	buffer_put_int(&m, seqnr);
+	buffer_put_int64(&m, blocks);
+	buffer_put_int(&m, packets);
 
-	debug3("%s: New keys have been sent", __FUNCTION__);
+	debug3("%s: New keys have been sent", __func__);
  skip:
 	/* More key context */
 	plen = packet_get_keycontext(MODE_OUT, NULL);
@@ -574,7 +633,7 @@ mm_send_keystate(struct monitor *pmonitor)
 	xfree(p);
 
 	/* Compression state */
-	debug3("%s: Sending compression state", __FUNCTION__);
+	debug3("%s: Sending compression state", __func__);
 	buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
 	buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
 
@@ -582,37 +641,41 @@ mm_send_keystate(struct monitor *pmonitor)
 	buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
 	buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
 
-	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
-	debug3("%s: Finished sending state", __FUNCTION__);
+	mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
+	debug3("%s: Finished sending state", __func__);
 
 	buffer_free(&m);
 }
 
 int
-mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
+mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
 {
 	Buffer m;
-	u_char *p;
+	char *p, *msg;
 	int success = 0;
 
 	buffer_init(&m);
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
 
-	debug3("%s: waiting for MONITOR_ANS_PTY", __FUNCTION__);
+	debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
 	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
 
 	success = buffer_get_int(&m);
 	if (success == 0) {
-		debug3("%s: pty alloc failed", __FUNCTION__);
+		debug3("%s: pty alloc failed", __func__);
 		buffer_free(&m);
 		return (0);
 	}
 	p = buffer_get_string(&m, NULL);
+	msg = buffer_get_string(&m, NULL);
 	buffer_free(&m);
 
 	strlcpy(namebuf, p, namebuflen); /* Possible truncation */
 	xfree(p);
 
+	buffer_append(&loginmsg, msg, strlen(msg));
+	xfree(msg);
+
 	*ptyfd = mm_receive_fd(pmonitor->m_recvfd);
 	*ttyfd = mm_receive_fd(pmonitor->m_recvfd);
 
@@ -621,9 +684,8 @@ mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
 }
 
 void
-mm_session_pty_cleanup2(void *session)
+mm_session_pty_cleanup2(Session *s)
 {
-	Session *s = session;
 	Buffer m;
 
 	if (s->ttyfd == -1)
@@ -643,19 +705,134 @@ mm_session_pty_cleanup2(void *session)
 
 #ifdef USE_PAM
 void
-mm_start_pam(char *user)
+mm_start_pam(Authctxt *authctxt)
 {
 	Buffer m;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
+	if (!options.use_pam)
+		fatal("UsePAM=no, but ended up in %s anyway", __func__);
 
 	buffer_init(&m);
-	buffer_put_cstring(&m, user);
-
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
 
 	buffer_free(&m);
 }
+
+u_int
+mm_do_pam_account(void)
+{
+	Buffer m;
+	u_int ret;
+	char *msg;
+
+	debug3("%s entering", __func__);
+	if (!options.use_pam)
+		fatal("UsePAM=no, but ended up in %s anyway", __func__);
+
+	buffer_init(&m);
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
+
+	mm_request_receive_expect(pmonitor->m_recvfd,
+	    MONITOR_ANS_PAM_ACCOUNT, &m);
+	ret = buffer_get_int(&m);
+	msg = buffer_get_string(&m, NULL);
+	buffer_append(&loginmsg, msg, strlen(msg));
+	xfree(msg);
+
+	buffer_free(&m);
+
+	debug3("%s returning %d", __func__, ret);
+
+	return (ret);
+}
+
+void *
+mm_sshpam_init_ctx(Authctxt *authctxt)
+{
+	Buffer m;
+	int success;
+
+	debug3("%s", __func__);
+	buffer_init(&m);
+	buffer_put_cstring(&m, authctxt->user);
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
+	debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
+	success = buffer_get_int(&m);
+	if (success == 0) {
+		debug3("%s: pam_init_ctx failed", __func__);
+		buffer_free(&m);
+		return (NULL);
+	}
+	buffer_free(&m);
+	return (authctxt);
+}
+
+int
+mm_sshpam_query(void *ctx, char **name, char **info,
+    u_int *num, char ***prompts, u_int **echo_on)
+{
+	Buffer m;
+	u_int i;
+	int ret;
+
+	debug3("%s", __func__);
+	buffer_init(&m);
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
+	debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
+	ret = buffer_get_int(&m);
+	debug3("%s: pam_query returned %d", __func__, ret);
+	*name = buffer_get_string(&m, NULL);
+	*info = buffer_get_string(&m, NULL);
+	*num = buffer_get_int(&m);
+	if (*num > PAM_MAX_NUM_MSG)
+		fatal("%s: recieved %u PAM messages, expected <= %u",
+		    __func__, *num, PAM_MAX_NUM_MSG);
+	*prompts = xcalloc((*num + 1), sizeof(char *));
+	*echo_on = xcalloc((*num + 1), sizeof(u_int));
+	for (i = 0; i < *num; ++i) {
+		(*prompts)[i] = buffer_get_string(&m, NULL);
+		(*echo_on)[i] = buffer_get_int(&m);
+	}
+	buffer_free(&m);
+	return (ret);
+}
+
+int
+mm_sshpam_respond(void *ctx, u_int num, char **resp)
+{
+	Buffer m;
+	u_int i;
+	int ret;
+
+	debug3("%s", __func__);
+	buffer_init(&m);
+	buffer_put_int(&m, num);
+	for (i = 0; i < num; ++i)
+		buffer_put_cstring(&m, resp[i]);
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
+	debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
+	ret = buffer_get_int(&m);
+	debug3("%s: pam_respond returned %d", __func__, ret);
+	buffer_free(&m);
+	return (ret);
+}
+
+void
+mm_sshpam_free_ctx(void *ctxtp)
+{
+	Buffer m;
+
+	debug3("%s", __func__);
+	buffer_init(&m);
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
+	debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
+	buffer_free(&m);
+}
 #endif /* USE_PAM */
 
 /* Request process termination */
@@ -694,11 +871,11 @@ static void
 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
     char ***prompts, u_int **echo_on)
 {
-	*name       = xstrdup("");
-	*infotxt    = xstrdup("");
+	*name = xstrdup("");
+	*infotxt = xstrdup("");
 	*numprompts = 1;
-	*prompts = xmalloc(*numprompts * sizeof(char*));
-	*echo_on = xmalloc(*numprompts * sizeof(u_int));
+	*prompts = xcalloc(*numprompts, sizeof(char *));
+	*echo_on = xcalloc(*numprompts, sizeof(u_int));
 	(*echo_on)[0] = 0;
 }
 
@@ -707,19 +884,19 @@ mm_bsdauth_query(void *ctx, char **name, char **infotxt,
    u_int *numprompts, char ***prompts, u_int **echo_on)
 {
 	Buffer m;
-	int res;
+	u_int success;
 	char *challenge;
 
-	debug3("%s: entering", __FUNCTION__);
+	debug3("%s: entering", __func__);
 
 	buffer_init(&m);
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
 
 	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
 	    &m);
-	res = buffer_get_int(&m);
-	if (res == -1) {
-		debug3("%s: no challenge", __FUNCTION__);
+	success = buffer_get_int(&m);
+	if (success == 0) {
+		debug3("%s: no challenge", __func__);
 		buffer_free(&m);
 		return (-1);
 	}
@@ -731,7 +908,7 @@ mm_bsdauth_query(void *ctx, char **name, char **infotxt,
 	mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
 	(*prompts)[0] = challenge;
 
-	debug3("%s: received challenge: %s", __FUNCTION__, challenge);
+	debug3("%s: received challenge: %s", __func__, challenge);
 
 	return (0);
 }
@@ -742,7 +919,7 @@ mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
 	Buffer m;
 	int authok;
 
-	debug3("%s: entering", __FUNCTION__);
+	debug3("%s: entering", __func__);
 	if (numresponses != 1)
 		return (-1);
 
@@ -759,24 +936,25 @@ mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
 	return ((authok == 0) ? -1 : 0);
 }
 
+#ifdef SKEY
 int
 mm_skey_query(void *ctx, char **name, char **infotxt,
    u_int *numprompts, char ***prompts, u_int **echo_on)
 {
 	Buffer m;
-	int len, res;
-	char *p, *challenge;
+	u_int success;
+	char *challenge;
 
-	debug3("%s: entering", __FUNCTION__);
+	debug3("%s: entering", __func__);
 
 	buffer_init(&m);
 	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
 
 	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
 	    &m);
-	res = buffer_get_int(&m);
-	if (res == -1) {
-		debug3("%s: no challenge", __FUNCTION__);
+	success = buffer_get_int(&m);
+	if (success == 0) {
+		debug3("%s: no challenge", __func__);
 		buffer_free(&m);
 		return (-1);
 	}
@@ -785,15 +963,11 @@ mm_skey_query(void *ctx, char **name, char **infotxt,
 	challenge  = buffer_get_string(&m, NULL);
 	buffer_free(&m);
 
-	debug3("%s: received challenge: %s", __FUNCTION__, challenge);
+	debug3("%s: received challenge: %s", __func__, challenge);
 
 	mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
 
-	len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
-	p = xmalloc(len);
-	strlcpy(p, challenge, len);
-	strlcat(p, SKEY_PROMPT, len);
-	(*prompts)[0] = p;
+	xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
 	xfree(challenge);
 
 	return (0);
@@ -805,7 +979,7 @@ mm_skey_respond(void *ctx, u_int numresponses, char **responses)
 	Buffer m;
 	int authok;
 
-	debug3("%s: entering", __FUNCTION__);
+	debug3("%s: entering", __func__);
 	if (numresponses != 1)
 		return (-1);
 
@@ -821,6 +995,7 @@ mm_skey_respond(void *ctx, u_int numresponses, char **responses)
 
 	return ((authok == 0) ? -1 : 0);
 }
+#endif /* SKEY */
 
 void
 mm_ssh1_session_id(u_char session_id[16])
@@ -828,7 +1003,7 @@ mm_ssh1_session_id(u_char session_id[16])
 	Buffer m;
 	int i;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	buffer_init(&m);
 	for (i = 0; i < 16; i++)
@@ -845,9 +1020,9 @@ mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
 	Key *key;
 	u_char *blob;
 	u_int blen;
-	int allowed = 0;
+	int allowed = 0, have_forced = 0;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	buffer_init(&m);
 	buffer_put_bignum2(&m, client_n);
@@ -857,10 +1032,15 @@ mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
 
 	allowed = buffer_get_int(&m);
 
+	/* fake forced command */
+	auth_clear_options();
+	have_forced = buffer_get_int(&m);
+	forced_command = have_forced ? xstrdup("true") : NULL;
+
 	if (allowed && rkey != NULL) {
 		blob = buffer_get_string(&m, &blen);
 		if ((key = key_from_blob(blob, blen)) == NULL)
-			fatal("%s: key_from_blob failed", __FUNCTION__);
+			fatal("%s: key_from_blob failed", __func__);
 		*rkey = key;
 		xfree(blob);
 	}
@@ -878,14 +1058,14 @@ mm_auth_rsa_generate_challenge(Key *key)
 	u_char *blob;
 	u_int blen;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	if ((challenge = BN_new()) == NULL)
-		fatal("%s: BN_new failed", __FUNCTION__);
+		fatal("%s: BN_new failed", __func__);
 
 	key->type = KEY_RSA;    /* XXX cheat for key_to_blob */
 	if (key_to_blob(key, &blob, &blen) == 0)
-		fatal("%s: key_to_blob failed", __FUNCTION__);
+		fatal("%s: key_to_blob failed", __func__);
 	key->type = KEY_RSA1;
 
 	buffer_init(&m);
@@ -909,11 +1089,11 @@ mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
 	u_int blen;
 	int success = 0;
 
-	debug3("%s entering", __FUNCTION__);
+	debug3("%s entering", __func__);
 
 	key->type = KEY_RSA;    /* XXX cheat for key_to_blob */
 	if (key_to_blob(key, &blob, &blen) == 0)
-		fatal("%s: key_to_blob failed", __FUNCTION__);
+		fatal("%s: key_to_blob failed", __func__);
 	key->type = KEY_RSA1;
 
 	buffer_init(&m);
@@ -929,3 +1109,219 @@ mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
 
 	return (success);
 }
+
+#ifdef SSH_AUDIT_EVENTS
+void
+mm_audit_event(ssh_audit_event_t event)
+{
+	Buffer m;
+
+	debug3("%s entering", __func__);
+
+	buffer_init(&m);
+	buffer_put_int(&m, event);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
+	buffer_free(&m);
+}
+
+void
+mm_audit_run_command(const char *command)
+{
+	Buffer m;
+
+	debug3("%s entering command %s", __func__, command);
+
+	buffer_init(&m);
+	buffer_put_cstring(&m, command);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
+	buffer_free(&m);
+}
+#endif /* SSH_AUDIT_EVENTS */
+
+#ifdef GSSAPI
+OM_uint32
+mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
+{
+	Buffer m;
+	OM_uint32 major;
+
+	/* Client doesn't get to see the context */
+	*ctx = NULL;
+
+	buffer_init(&m);
+	buffer_put_string(&m, goid->elements, goid->length);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
+
+	major = buffer_get_int(&m);
+
+	buffer_free(&m);
+	return (major);
+}
+
+OM_uint32
+mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
+    gss_buffer_desc *out, OM_uint32 *flags)
+{
+	Buffer m;
+	OM_uint32 major;
+	u_int len;
+
+	buffer_init(&m);
+	buffer_put_string(&m, in->value, in->length);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
+
+	major = buffer_get_int(&m);
+	out->value = buffer_get_string(&m, &len);
+	out->length = len;
+	if (flags)
+		*flags = buffer_get_int(&m);
+
+	buffer_free(&m);
+
+	return (major);
+}
+
+OM_uint32
+mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
+{
+	Buffer m;
+	OM_uint32 major;
+
+	buffer_init(&m);
+	buffer_put_string(&m, gssbuf->value, gssbuf->length);
+	buffer_put_string(&m, gssmic->value, gssmic->length);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
+	    &m);
+
+	major = buffer_get_int(&m);
+	buffer_free(&m);
+	return(major);
+}
+
+int
+mm_ssh_gssapi_userok(char *user)
+{
+	Buffer m;
+	int authenticated = 0;
+
+	buffer_init(&m);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
+				  &m);
+
+	authenticated = buffer_get_int(&m);
+
+	buffer_free(&m);
+	debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
+	return (authenticated);
+}
+
+OM_uint32
+mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash)
+{
+	Buffer m;
+	OM_uint32 major;
+	u_int len;
+
+	buffer_init(&m);
+	buffer_put_string(&m, data->value, data->length);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m);
+
+	major = buffer_get_int(&m);
+	hash->value = buffer_get_string(&m, &len);
+	hash->length = len;
+
+	buffer_free(&m);
+
+	return(major);
+}
+
+char *
+mm_ssh_gssapi_last_error(Gssctxt *ctx, OM_uint32 *major, OM_uint32 *minor) {
+	Buffer m;
+	OM_uint32 maj,min;
+	char *errstr;
+	
+	buffer_init(&m);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSERR, &m);
+	mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSERR, &m);
+
+	maj = buffer_get_int(&m);
+	min = buffer_get_int(&m);
+
+	if (major) *major=maj;
+	if (minor) *minor=min;
+	
+	errstr=buffer_get_string(&m,NULL);
+
+	buffer_free(&m);
+	
+	return(errstr);
+}	
+
+OM_uint32
+mm_gss_indicate_mechs(OM_uint32 *minor_status, gss_OID_set *mech_set)
+{
+        Buffer m;
+	OM_uint32 major,minor;
+	int count;
+	gss_OID_desc oid;
+        u_int length;
+
+	buffer_init(&m);
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSMECHS, &m);
+        mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSMECHS,
+				  &m);
+        major=buffer_get_int(&m);
+	count=buffer_get_int(&m);
+	
+        gss_create_empty_oid_set(&minor,mech_set);
+	while(count-->0) {
+	    oid.elements=buffer_get_string(&m,&length);
+	    oid.length=length;
+	    gss_add_oid_set_member(&minor,&oid,mech_set);
+	}
+
+	buffer_free(&m);
+	
+        return(major);
+}
+
+int
+mm_ssh_gssapi_localname(char **lname)
+{
+        Buffer m;
+
+	buffer_init(&m);
+        mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSLOCALNAME, &m);
+
+        debug3("%s: waiting for MONITOR_ANS_GSSLOCALNAME", __func__);
+        mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSLOCALNAME,
+                                  &m);
+
+	*lname = buffer_get_string(&m, NULL);
+
+        buffer_free(&m);
+	if (lname[0] == '\0') {
+	    debug3("%s: gssapi identity mapping failed", __func__);
+	} else {
+	    debug3("%s: gssapi identity mapped to %s", __func__, *lname);
+	}
+	
+        return(0);
+}	
+
+#endif /* GSSAPI */