diff options
Diffstat (limited to 'crypto/openssh/monitor_wrap.c')
| -rw-r--r-- | crypto/openssh/monitor_wrap.c | 1227 |
1 files changed, 0 insertions, 1227 deletions
diff --git a/crypto/openssh/monitor_wrap.c b/crypto/openssh/monitor_wrap.c deleted file mode 100644 index 3865539..0000000 --- a/crypto/openssh/monitor_wrap.c +++ /dev/null @@ -1,1227 +0,0 @@ -/* $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> - * 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" - -#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 "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 "atomicio.h" -#include "monitor_fdpass.h" -#include "misc.h" -#include "servconf.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 *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 sock, enum monitor_reqtype type, Buffer *m) -{ - u_int mlen = buffer_len(m); - u_char buf[5]; - - debug3("%s entering: type %d", __func__, type); - - 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 sock, Buffer *m) -{ - u_char buf[4]; - u_int msg_len; - - debug3("%s entering", __func__); - - 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_u32(buf); - if (msg_len > 256 * 1024) - fatal("%s: read: bad msg_len %d", __func__, msg_len); - buffer_clear(m); - buffer_append_space(m, msg_len); - if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) - fatal("%s: read: %s", __func__, strerror(errno)); -} - -void -mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) -{ - u_char rtype; - - debug3("%s entering: type %d", __func__, type); - - mm_request_receive(sock, m); - rtype = buffer_get_char(m); - if (rtype != type) - fatal("%s: read: rtype %d != type %d", __func__, - 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(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); - - 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", __func__); - - if ((p = BN_new()) == NULL) - fatal("%s: BN_new failed", __func__); - if ((g = BN_new()) == NULL) - fatal("%s: BN_new failed", __func__); - buffer_get_bignum2(&m, p); - buffer_get_bignum2(&m, g); - - debug3("%s: remaining %d", __func__, 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 = *pmonitor->m_pkex; - Buffer m; - - debug3("%s entering", __func__); - - buffer_init(&m); - buffer_put_int(&m, kex->host_key_index(key)); - buffer_put_string(&m, data, datalen); - - mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); - - 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); - - return (0); -} - -struct passwd * -mm_getpwnamallow(const char *username) -{ - Buffer m; - struct passwd *pw; - u_int pwlen; - - debug3("%s entering", __func__); - - buffer_init(&m); - buffer_put_cstring(&m, username); - - mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); - - 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) { - buffer_free(&m); - return (NULL); - } - pw = buffer_get_string(&m, &pwlen); - if (pwlen != sizeof(struct passwd)) - 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); -#ifdef HAVE_PW_CLASS_IN_PASSWD - pw->pw_class = buffer_get_string(&m, NULL); -#endif - pw->pw_dir = buffer_get_string(&m, NULL); - pw->pw_shell = buffer_get_string(&m, NULL); - buffer_free(&m); - - return (pw); -} - -char * -mm_auth2_read_banner(void) -{ - Buffer m; - char *banner; - - 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); - 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); -} - -/* Inform the privileged process about service and style */ - -void -mm_inform_authserv(char *service, char *style) -{ - Buffer m; - - debug3("%s entering", __func__); - - buffer_init(&m); - buffer_put_cstring(&m, service); - buffer_put_cstring(&m, style ? style : ""); - - mm_request_send(pmonitor->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", __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", __func__); - mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); - - authenticated = buffer_get_int(&m); - - buffer_free(&m); - - debug3("%s: user %sauthenticated", - __func__, 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", __func__, 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, have_forced = 0; - - debug3("%s entering", __func__); - - /* 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(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); - - 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); - - 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", __func__); - - /* 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(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); - - debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); - mm_request_receive_expect(pmonitor->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)", __func__, 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 %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", __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", __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 length: %u > %d", __func__, 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 %u", len); - buffer_free(&b); - return (newkey); -} - -int -mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) -{ - Buffer b; - int len; - Enc *enc; - Mac *mac; - Comp *comp; - Newkeys *newkey = newkeys[mode]; - - debug3("%s: converting %p", __func__, newkey); - - if (newkey == NULL) { - error("%s: newkey == NULL", __func__); - 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); - if (lenp != NULL) - *lenp = len; - if (blobp != NULL) { - *blobp = xmalloc(len); - memcpy(*blobp, buffer_ptr(&b), len); - } - memset(buffer_ptr(&b), 0, len); - buffer_free(&b); - 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; - u_int32_t seqnr, packets; - u_int64_t blocks; - - buffer_init(&m); - - if (!compat20) { - u_char iv[24]; - 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 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); - 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", - __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", __func__); - - buffer_put_string(&m, blob, bloblen); - xfree(blob); - - if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) - fatal("%s: conversion of newkeys failed", __func__); - - buffer_put_string(&m, blob, bloblen); - xfree(blob); - - 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", __func__); - 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", __func__); - 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", __func__); - - buffer_free(&m); -} - -int -mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) -{ - Buffer m; - 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", __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", __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); - - /* Success */ - return (1); -} - -void -mm_session_pty_cleanup2(Session *s) -{ - Buffer m; - - if (s->ttyfd == -1) - return; - buffer_init(&m); - buffer_put_cstring(&m, s->tty); - mm_request_send(pmonitor->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; -} - -#ifdef USE_PAM -void -mm_start_pam(Authctxt *authctxt) -{ - Buffer m; - - 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_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 */ - -void -mm_terminate(void) -{ - Buffer m; - - buffer_init(&m); - mm_request_send(pmonitor->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(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); - - mm_request_receive_expect(pmonitor->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 = xcalloc(*numprompts, sizeof(char *)); - *echo_on = xcalloc(*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; - u_int success; - char *challenge; - - 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); - success = buffer_get_int(&m); - if (success == 0) { - debug3("%s: no challenge", __func__); - 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", __func__, challenge); - - return (0); -} - -int -mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) -{ - Buffer m; - int authok; - - debug3("%s: entering", __func__); - if (numresponses != 1) - return (-1); - - buffer_init(&m); - buffer_put_cstring(&m, responses[0]); - mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); - - mm_request_receive_expect(pmonitor->m_recvfd, - MONITOR_ANS_BSDAUTHRESPOND, &m); - - authok = buffer_get_int(&m); - buffer_free(&m); - - 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; - u_int success; - char *challenge; - - 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); - success = buffer_get_int(&m); - if (success == 0) { - debug3("%s: no challenge", __func__); - 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", __func__, challenge); - - mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); - - xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); - xfree(challenge); - - return (0); -} - -int -mm_skey_respond(void *ctx, u_int numresponses, char **responses) -{ - Buffer m; - int authok; - - debug3("%s: entering", __func__); - if (numresponses != 1) - return (-1); - - buffer_init(&m); - buffer_put_cstring(&m, responses[0]); - mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); - - mm_request_receive_expect(pmonitor->m_recvfd, - MONITOR_ANS_SKEYRESPOND, &m); - - authok = buffer_get_int(&m); - buffer_free(&m); - - return ((authok == 0) ? -1 : 0); -} -#endif /* SKEY */ - -void -mm_ssh1_session_id(u_char session_id[16]) -{ - Buffer m; - int i; - - debug3("%s entering", __func__); - - buffer_init(&m); - for (i = 0; i < 16; i++) - buffer_put_char(&m, session_id[i]); - - mm_request_send(pmonitor->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, have_forced = 0; - - debug3("%s entering", __func__); - - buffer_init(&m); - buffer_put_bignum2(&m, client_n); - - mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); - mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &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; - - if (allowed && rkey != NULL) { - blob = buffer_get_string(&m, &blen); - if ((key = key_from_blob(blob, blen)) == NULL) - fatal("%s: key_from_blob failed", __func__); - *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", __func__); - - if ((challenge = BN_new()) == NULL) - 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", __func__); - key->type = KEY_RSA1; - - buffer_init(&m); - buffer_put_string(&m, blob, blen); - xfree(blob); - - mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); - mm_request_receive_expect(pmonitor->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", __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", __func__); - key->type = KEY_RSA1; - - buffer_init(&m); - buffer_put_string(&m, blob, blen); - buffer_put_string(&m, response, 16); - xfree(blob); - - mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); - mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); - - success = buffer_get_int(&m); - buffer_free(&m); - - 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); -} -#endif /* GSSAPI */ |
