- provos@cvs.openbsd.org 2002/03/18 17:50:31

     [auth-bsdauth.c auth-options.c auth-rh-rsa.c auth-rsa.c auth-skey.c auth.h
      auth1.c auth2-chall.c auth2.c kex.c kex.h kexdh.c kexgex.c servconf.c
      session.h servconf.h serverloop.c session.c sshd.c]
     integrate privilege separated openssh; its turned off by default for now.
     work done by me and markus@

applied, but outside of ensure that smaller code bits migrated with
their owners.. no work was tried to 'fix' it to work. =)  Later project!

1 files changed, 894 insertions, 0 deletions

diff --git a/monitor_wrap.c b/monitor_wrap.c
new file mode 100644
index 000000000..e477cff25
--- /dev/null
+++ b/monitor_wrap.c
@@ -0,0 +1,894 @@
+/*
+ * Copyright 2002 Niels Provos <provos@citi.umich.edu>
+ * Copyright 2002 Markus Friedl <markus@openbsd.org>
+ * 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.
+ */
+
+#include "includes.h"
+RCSID("$OpenBSD: monitor_wrap.c,v 1.4 2002/03/19 14:27:39 markus Exp $");
+
+#include <openssl/bn.h>
+#include <openssl/dh.h>
+
+#include "ssh.h"
+#include "dh.h"
+#include "kex.h"
+#include "auth.h"
+#include "buffer.h"
+#include "bufaux.h"
+#include "packet.h"
+#include "mac.h"
+#include "log.h"
+#include "zlib.h"
+#include "monitor.h"
+#include "monitor_wrap.h"
+#include "xmalloc.h"
+#include "atomicio.h"
+#include "monitor_fdpass.h"
+#include "getput.h"
+
+#include "auth.h"
+#include "channels.h"
+#include "session.h"
+
+/* Imports */
+extern int compat20;
+extern Newkeys *newkeys[];
+extern z_stream incoming_stream;
+extern z_stream outgoing_stream;
+extern struct monitor *monitor;
+extern Buffer input, output;
+
+void
+mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
+{
+        u_char buf[5];
+        u_int mlen = buffer_len(m);
+
+        debug3("%s entering: type %d", __FUNCTION__, 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__);
+}
+
+void
+mm_request_receive(int socket, Buffer *m)
+{
+        u_char buf[4];
+        ssize_t res;
+        u_int msg_len;
+
+        debug3("%s entering", __FUNCTION__);
+
+        res = atomicio(read, socket, buf, sizeof(buf));
+        if (res != sizeof(buf)) {
+                if (res == 0)
+                        fatal_cleanup();
+                fatal("%s: read: %d", __FUNCTION__, res);
+        }
+        msg_len = GET_32BIT(buf);
+        if (msg_len > 256 * 1024)
+                fatal("%s: read: bad msg_len %d", __FUNCTION__, 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: %d != msg_len", __FUNCTION__, res);
+}
+
+void
+mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m)
+{
+        u_char rtype;
+
+        debug3("%s entering: type %d", __FUNCTION__, type);
+
+        mm_request_receive(socket, m);
+        rtype = buffer_get_char(m);
+        if (rtype != type)
+                fatal("%s: read: rtype %d != type %d", __FUNCTION__,
+                    rtype, type);
+}
+
+DH *
+mm_choose_dh(int min, int nbits, int max)
+{
+        BIGNUM *p, *g;
+        int success = 0;
+        Buffer m;
+
+        buffer_init(&m);
+        buffer_put_int(&m, min);
+        buffer_put_int(&m, nbits);
+        buffer_put_int(&m, max);
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_MODULI, &m);
+
+        debug3("%s: waiting for MONITOR_ANS_MODULI", __FUNCTION__);
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_MODULI, &m);
+
+        success = buffer_get_char(&m);
+        if (success == 0)
+                fatal("%s: MONITOR_ANS_MODULI failed", __FUNCTION__);
+
+        if ((p = BN_new()) == NULL)
+                fatal("%s: BN_new failed", __FUNCTION__);
+        if ((g = BN_new()) == NULL)
+                fatal("%s: BN_new failed", __FUNCTION__);
+        buffer_get_bignum2(&m, p);
+        buffer_get_bignum2(&m, g);
+
+        debug3("%s: remaining %d", __FUNCTION__, buffer_len(&m));
+        buffer_free(&m);
+
+        return (dh_new_group(g, p));
+}
+
+int
+mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
+{
+        Kex *kex = *monitor->m_pkex;
+        Buffer m;
+
+        debug3("%s entering", __FUNCTION__);
+
+        buffer_init(&m);
+        buffer_put_int(&m, kex->host_key_index(key));
+        buffer_put_string(&m, data, datalen);
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_SIGN, &m);
+
+        debug3("%s: waiting for MONITOR_ANS_SIGN", __FUNCTION__);
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_SIGN, &m);
+        *sigp  = buffer_get_string(&m, lenp);
+        buffer_free(&m);
+
+        return (0);
+}
+
+struct passwd *
+mm_getpwnamallow(const char *login)
+{
+        Buffer m;
+        struct passwd *pw;
+        u_int pwlen;
+
+        debug3("%s entering", __FUNCTION__);
+
+        buffer_init(&m);
+        buffer_put_cstring(&m, login);
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
+
+        debug3("%s: waiting for MONITOR_ANS_PWNAM", __FUNCTION__);
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
+
+        if (buffer_get_char(&m) == 0) {
+                buffer_free(&m);
+                return (NULL);
+        }
+        pw = buffer_get_string(&m, &pwlen);
+        if (pwlen != sizeof(struct passwd))
+                fatal("%s: struct passwd size mismatch", __FUNCTION__);
+        pw->pw_name = buffer_get_string(&m, NULL);
+        pw->pw_passwd = buffer_get_string(&m, NULL);
+        pw->pw_gecos = buffer_get_string(&m, NULL);
+        pw->pw_class = buffer_get_string(&m, NULL);
+        pw->pw_dir = buffer_get_string(&m, NULL);
+        pw->pw_shell = buffer_get_string(&m, NULL);
+        buffer_free(&m);
+
+        return (pw);
+}
+
+/* Inform the privileged process about service and style */
+
+void
+mm_inform_authserv(char *service, char *style)
+{
+        Buffer m;
+
+        debug3("%s entering", __FUNCTION__);
+
+        buffer_init(&m);
+        buffer_put_cstring(&m, service);
+        buffer_put_cstring(&m, style ? style : "");
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
+
+        buffer_free(&m);
+}
+
+/* Do the password authentication */
+int
+mm_auth_password(Authctxt *authctxt, char *password)
+{
+        Buffer m;
+        int authenticated = 0;
+
+        debug3("%s entering", __FUNCTION__);
+
+        buffer_init(&m);
+        buffer_put_cstring(&m, password);
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
+
+        debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __FUNCTION__);
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
+
+        authenticated = buffer_get_int(&m);
+
+        buffer_free(&m);
+
+        debug3("%s: user %sauthenticated",
+            __FUNCTION__, authenticated ? "" : "not ");
+        return (authenticated);
+}
+
+int
+mm_user_key_allowed(struct passwd *pw, Key *key)
+{
+        return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
+}
+
+int
+mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
+    Key *key)
+{
+        return (mm_key_allowed(MM_HOSTKEY, user, host, key));
+}
+
+int
+mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
+    char *host, Key *key)
+{
+        int ret;
+
+        key->type = KEY_RSA; /* XXX hack for key_to_blob */
+        ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
+        key->type = KEY_RSA1;
+        return (ret);
+}
+
+static void
+mm_send_debug(Buffer *m)
+{
+        char *msg;
+
+        while (buffer_len(m)) {
+                msg = buffer_get_string(m, NULL);
+                debug3("%s: Sending debug: %s", __FUNCTION__, msg);
+                packet_send_debug("%s", msg);
+                xfree(msg);
+        }
+}
+
+int
+mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
+{
+        Buffer m;
+        u_char *blob;
+        u_int len;
+        int allowed = 0;
+
+        debug3("%s entering", __FUNCTION__);
+
+        /* Convert the key to a blob and the pass it over */
+        if (!key_to_blob(key, &blob, &len))
+                return (0);
+
+        buffer_init(&m);
+        buffer_put_int(&m, type);
+        buffer_put_cstring(&m, user ? user : "");
+        buffer_put_cstring(&m, host ? host : "");
+        buffer_put_string(&m, blob, len);
+        xfree(blob);
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
+
+        debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __FUNCTION__);
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
+
+        allowed = buffer_get_int(&m);
+
+        /* Send potential debug messages */
+        mm_send_debug(&m);
+
+        buffer_free(&m);
+
+        return (allowed);
+}
+
+/*
+ * This key verify needs to send the key type along, because the
+ * privileged parent makes the decision if the key is allowed
+ * for authentication.
+ */
+
+int
+mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
+{
+        Buffer m;
+        u_char *blob;
+        u_int len;
+        int verified = 0;
+
+        debug3("%s entering", __FUNCTION__);
+
+        /* Convert the key to a blob and the pass it over */
+        if (!key_to_blob(key, &blob, &len))
+                return (0);
+
+        buffer_init(&m);
+        buffer_put_string(&m, blob, len);
+        buffer_put_string(&m, sig, siglen);
+        buffer_put_string(&m, data, datalen);
+        xfree(blob);
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
+
+        debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __FUNCTION__);
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
+
+        verified = buffer_get_int(&m);
+
+        buffer_free(&m);
+
+        return (verified);
+}
+
+/* Export key state after authentication */
+Newkeys *
+mm_newkeys_from_blob(u_char *blob, int blen)
+{
+        Buffer b;
+        u_int len;
+        Newkeys *newkey = NULL;
+        Enc *enc;
+        Mac *mac;
+        Comp *comp;
+
+        debug3("%s: %p(%d)", __FUNCTION__, blob, blen);
+#ifdef DEBUG_PK
+        dump_base64(stderr, blob, blen);
+#endif
+        buffer_init(&b);
+        buffer_append(&b, blob, blen);
+
+        newkey = xmalloc(sizeof(*newkey));
+        enc = &newkey->enc;
+        mac = &newkey->mac;
+        comp = &newkey->comp;
+
+        /* Enc structure */
+        enc->name = buffer_get_string(&b, NULL);
+        buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
+        enc->enabled = buffer_get_int(&b);
+        enc->block_size = buffer_get_int(&b);
+        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__,
+                    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__,
+                    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);
+        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,
+                    mac->key_len);
+        mac->key_len = len;
+
+        /* Comp structure */
+        comp->type = buffer_get_int(&b);
+        comp->enabled = buffer_get_int(&b);
+        comp->name = buffer_get_string(&b, NULL);
+
+        len = buffer_len(&b);
+        if (len != 0)
+                error("newkeys_from_blob: remaining bytes in blob %d", len);
+        buffer_free(&b);
+        return (newkey);
+}
+
+int
+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);
+
+        if (newkey == NULL) {
+                error("%s: newkey == NULL", __FUNCTION__);
+                return 0;
+        }
+        enc = &newkey->enc;
+        mac = &newkey->mac;
+        comp = &newkey->comp;
+
+        buffer_init(&b);
+        /* Enc structure */
+        buffer_put_cstring(&b, enc->name);
+        /* The cipher struct is constant and shared, you export pointer */
+        buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
+        buffer_put_int(&b, enc->enabled);
+        buffer_put_int(&b, enc->block_size);
+        buffer_put_string(&b, enc->key, enc->key_len);
+        packet_get_keyiv(mode, enc->iv, enc->block_size);
+        buffer_put_string(&b, enc->iv, enc->block_size);
+
+        /* Mac structure */
+        buffer_put_cstring(&b, mac->name);
+        buffer_put_int(&b, mac->enabled);
+        buffer_put_string(&b, mac->key, mac->key_len);
+
+        /* Comp structure */
+        buffer_put_int(&b, comp->type);
+        buffer_put_int(&b, comp->enabled);
+        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;
+        return len;
+}
+
+static void
+mm_send_kex(Buffer *m, Kex *kex)
+{
+        buffer_put_string(m, kex->session_id, kex->session_id_len);
+        buffer_put_int(m, kex->we_need);
+        buffer_put_int(m, kex->hostkey_type);
+        buffer_put_int(m, kex->kex_type);
+        buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
+        buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
+        buffer_put_int(m, kex->flags);
+        buffer_put_cstring(m, kex->client_version_string);
+        buffer_put_cstring(m, kex->server_version_string);
+}
+
+void
+mm_send_keystate(struct monitor *monitor)
+{
+        Buffer m;
+        u_char *blob, *p;
+        u_int bloblen, plen;
+
+        buffer_init(&m);
+
+        if (!compat20) {
+                u_char iv[24];
+                int ivlen;
+
+                buffer_put_int(&m, packet_get_protocol_flags());
+
+                buffer_put_int(&m, packet_get_ssh1_cipher());
+
+                debug3("%s: Sending ssh1 IV", __FUNCTION__);
+                ivlen = packet_get_keyiv_len(MODE_OUT);
+                packet_get_keyiv(MODE_OUT, iv, ivlen);
+                buffer_put_string(&m, iv, ivlen);
+                ivlen = packet_get_keyiv_len(MODE_OUT);
+                packet_get_keyiv(MODE_IN, iv, ivlen);
+                buffer_put_string(&m, iv, ivlen);
+                goto skip;
+        } else {
+                /* Kex for rekeying */
+                mm_send_kex(&m, *monitor->m_pkex);
+        }
+
+        debug3("%s: Sending new keys: %p %p",
+            __FUNCTION__, 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__);
+
+        buffer_put_string(&m, blob, bloblen);
+        xfree(blob);
+
+        if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
+                fatal("%s: conversion of newkeys failed", __FUNCTION__);
+
+        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));
+
+        debug3("%s: New keys have been sent", __FUNCTION__);
+ skip:
+        /* More key context */
+        plen = packet_get_keycontext(MODE_OUT, NULL);
+        p = xmalloc(plen+1);
+        packet_get_keycontext(MODE_OUT, p);
+        buffer_put_string(&m, p, plen);
+        xfree(p);
+
+        plen = packet_get_keycontext(MODE_IN, NULL);
+        p = xmalloc(plen+1);
+        packet_get_keycontext(MODE_IN, p);
+        buffer_put_string(&m, p, plen);
+        xfree(p);
+
+        /* Compression state */
+        debug3("%s: Sending compression state", __FUNCTION__);
+        buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
+        buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
+
+        /* Network I/O buffers */
+        buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
+        buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
+        debug3("%s: Finished sending state", __FUNCTION__);
+
+        buffer_free(&m);
+}
+
+int
+mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
+{
+        Buffer m;
+        u_char *p;
+        int success = 0;
+
+        buffer_init(&m);
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_PTY, &m);
+
+        debug3("%s: waiting for MONITOR_ANS_PTY", __FUNCTION__);
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_PTY, &m);
+
+        success = buffer_get_int(&m);
+        if (success == 0) {
+                debug3("%s: pty alloc failed", __FUNCTION__);
+                buffer_free(&m);
+                return (0);
+        }
+        p = buffer_get_string(&m, NULL);
+        buffer_free(&m);
+
+        strlcpy(namebuf, p, namebuflen); /* Possible truncation */
+        xfree(p);
+
+        *ptyfd = mm_receive_fd(monitor->m_recvfd);
+        *ttyfd = mm_receive_fd(monitor->m_recvfd);
+
+        /* Success */
+        return (1);
+}
+
+void
+mm_session_pty_cleanup2(void *session)
+{
+        Session *s = session;
+        Buffer m;
+
+        if (s->ttyfd == -1)
+                return;
+        buffer_init(&m);
+        buffer_put_cstring(&m, s->tty);
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
+        buffer_free(&m);
+
+        /* closed dup'ed master */
+        if (close(s->ptymaster) < 0)
+                error("close(s->ptymaster): %s", strerror(errno));
+
+        /* unlink pty from session */
+        s->ttyfd = -1;
+}
+
+/* Request process termination */
+
+void
+mm_terminate(void)
+{
+        Buffer m;
+
+        buffer_init(&m);
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_TERM, &m);
+        buffer_free(&m);
+}
+
+int
+mm_ssh1_session_key(BIGNUM *num)
+{
+        int rsafail;
+        Buffer m;
+
+        buffer_init(&m);
+        buffer_put_bignum2(&m, num);
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
+
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
+
+        rsafail = buffer_get_int(&m);
+        buffer_get_bignum2(&m, num);
+
+        buffer_free(&m);
+
+        return (rsafail);
+}
+
+static void
+mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
+    char ***prompts, u_int **echo_on)
+{
+        *name       = xstrdup("");
+        *infotxt    = xstrdup("");
+        *numprompts = 1;
+        *prompts = xmalloc(*numprompts * sizeof(char*));
+        *echo_on = xmalloc(*numprompts * sizeof(u_int));
+        (*echo_on)[0] = 0;
+}
+
+int
+mm_bsdauth_query(void *ctx, char **name, char **infotxt,
+   u_int *numprompts, char ***prompts, u_int **echo_on)
+{
+        Buffer m;
+        int res;
+        char *challenge;
+
+        debug3("%s: entering", __FUNCTION__);
+
+        buffer_init(&m);
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
+
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
+            &m);
+        res = buffer_get_int(&m);
+        if (res == -1) {
+                debug3("%s: no challenge", __FUNCTION__);
+                buffer_free(&m);
+                return (-1);
+        }
+
+        /* Get the challenge, and format the response */
+        challenge  = buffer_get_string(&m, NULL);
+        buffer_free(&m);
+
+        mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
+        (*prompts)[0] = challenge;
+
+        debug3("%s: received challenge: %s", __FUNCTION__, challenge);
+
+        return (0);
+}
+
+int
+mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
+{
+        Buffer m;
+        int authok;
+
+        debug3("%s: entering", __FUNCTION__);
+        if (numresponses != 1)
+                return (-1);
+
+        buffer_init(&m);
+        buffer_put_cstring(&m, responses[0]);
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
+
+        mm_request_receive_expect(monitor->m_recvfd,
+            MONITOR_ANS_BSDAUTHRESPOND, &m);
+
+        authok = buffer_get_int(&m);
+        buffer_free(&m);
+
+        return ((authok == 0) ? -1 : 0);
+}
+
+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;
+
+        debug3("%s: entering", __FUNCTION__);
+
+        buffer_init(&m);
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
+
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
+            &m);
+        res = buffer_get_int(&m);
+        if (res == -1) {
+                debug3("%s: no challenge", __FUNCTION__);
+                buffer_free(&m);
+                return (-1);
+        }
+
+        /* Get the challenge, and format the response */
+        challenge  = buffer_get_string(&m, NULL);
+        buffer_free(&m);
+
+        debug3("%s: received challenge: %s", __FUNCTION__, 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;
+        xfree(challenge);
+
+        return (0);
+}
+
+int
+mm_skey_respond(void *ctx, u_int numresponses, char **responses)
+{
+        Buffer m;
+        int authok;
+
+        debug3("%s: entering", __FUNCTION__);
+        if (numresponses != 1)
+                return (-1);
+
+        buffer_init(&m);
+        buffer_put_cstring(&m, responses[0]);
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
+
+        mm_request_receive_expect(monitor->m_recvfd,
+            MONITOR_ANS_SKEYRESPOND, &m);
+
+        authok = buffer_get_int(&m);
+        buffer_free(&m);
+
+        return ((authok == 0) ? -1 : 0);
+}
+
+void
+mm_ssh1_session_id(u_char session_id[16])
+{
+        Buffer m;
+        int i;
+
+        debug3("%s entering", __FUNCTION__);
+
+        buffer_init(&m);
+        for (i = 0; i < 16; i++)
+                buffer_put_char(&m, session_id[i]);
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_SESSID, &m);
+        buffer_free(&m);
+}
+
+int
+mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
+{
+        Buffer m;
+        Key *key;
+        u_char *blob;
+        u_int blen;
+        int allowed = 0;
+
+        debug3("%s entering", __FUNCTION__);
+
+        buffer_init(&m);
+        buffer_put_bignum2(&m, client_n);
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
+
+        allowed = buffer_get_int(&m);
+
+        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__);
+                *rkey = key;
+                xfree(blob);
+        }
+        mm_send_debug(&m);
+        buffer_free(&m);
+
+        return (allowed);
+}
+
+BIGNUM *
+mm_auth_rsa_generate_challenge(Key *key)
+{
+        Buffer m;
+        BIGNUM *challenge;
+        u_char *blob;
+        u_int blen;
+
+        debug3("%s entering", __FUNCTION__);
+
+        if ((challenge = BN_new()) == NULL)
+                fatal("%s: BN_new failed", __FUNCTION__);
+
+        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__);
+        key->type = KEY_RSA1;
+
+        buffer_init(&m);
+        buffer_put_string(&m, blob, blen);
+        xfree(blob);
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
+
+        buffer_get_bignum2(&m, challenge);
+        buffer_free(&m);
+
+        return (challenge);
+}
+
+int
+mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
+{
+        Buffer m;
+        u_char *blob;
+        u_int blen;
+        int success = 0;
+
+        debug3("%s entering", __FUNCTION__);
+
+        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__);
+        key->type = KEY_RSA1;
+
+        buffer_init(&m);
+        buffer_put_string(&m, blob, blen);
+        buffer_put_string(&m, response, 16);
+        xfree(blob);
+
+        mm_request_send(monitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
+        mm_request_receive_expect(monitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
+
+        success = buffer_get_int(&m);
+        buffer_free(&m);
+
+        return (success);
+}