+/* $OpenBSD: monitor_wrap.c,v 1.63 2008/07/10 18:08:11 markus Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* Copyright 2002 Markus Friedl <markus@openbsd.org>
*/
#include "includes.h"
-RCSID("$OpenBSD: monitor_wrap.c,v 1.35 2003/11/17 11:06:07 markus 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 "openbsd-compat/sys-queue.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 "buffer.h"
-#include "bufaux.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"
-
-#ifdef GSSAPI
-#include "ssh-gss.h"
-#endif
+#include "servconf.h"
/* Imports */
extern int compat20;
extern z_stream outgoing_stream;
extern struct monitor *pmonitor;
extern Buffer input, output;
+extern Buffer loginmsg;
extern ServerOptions options;
int
}
void
-mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
+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_32BIT(buf, mlen + 1);
+ put_u32(buf, mlen + 1);
buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
- if (atomicio(vwrite, socket, buf, sizeof(buf)) != sizeof(buf))
- fatal("%s: write", __func__);
- if (atomicio(vwrite, socket, buffer_ptr(m), mlen) != mlen)
- fatal("%s: write", __func__);
+ 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];
u_int msg_len;
- ssize_t res;
debug3("%s entering", __func__);
- res = atomicio(read, socket, buf, sizeof(buf));
- if (res != sizeof(buf)) {
- if (res == 0)
+ if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
+ if (errno == EPIPE)
cleanup_exit(255);
- fatal("%s: read: %ld", __func__, (long)res);
+ 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", __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", __func__, (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", __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", __func__,
}
struct passwd *
-mm_getpwnamallow(const char *login)
+mm_getpwnamallow(const char *username)
{
Buffer m;
struct passwd *pw;
- u_int pwlen;
+ u_int len;
+ ServerOptions *newopts;
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);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
if (buffer_get_char(&m) == 0) {
- buffer_free(&m);
- return (NULL);
+ pw = NULL;
+ goto out;
}
- pw = buffer_get_string(&m, &pwlen);
- if (pwlen != sizeof(struct passwd))
+ pw = buffer_get_string(&m, &len);
+ if (len != 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);
#endif
pw->pw_dir = buffer_get_string(&m, NULL);
pw->pw_shell = buffer_get_string(&m, NULL);
+
+out:
+ /* copy options block as a Match directive may have changed some */
+ newopts = buffer_get_string(&m, &len);
+ if (len != sizeof(*newopts))
+ fatal("%s: option block size mismatch", __func__);
+ if (newopts->banner != NULL)
+ newopts->banner = buffer_get_string(&m, NULL);
+ copy_set_server_options(&options, newopts, 1);
+ xfree(newopts);
+
buffer_free(&m);
return (pw);
/* 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);
+ if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
+ fatal("%s: can not setup mac %s", __func__, mac->name);
mac->enabled = buffer_get_int(&b);
mac->key = buffer_get_string(&b, &len);
if (len > mac->key_len)
}
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;
+ u_int64_t blocks, bytes;
buffer_init(&m);
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",
buffer_put_string(&m, blob, bloblen);
xfree(blob);
- packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
+ packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
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_int64(&m, bytes);
+ packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
buffer_put_int(&m, seqnr);
buffer_put_int64(&m, blocks);
buffer_put_int(&m, packets);
+ buffer_put_int64(&m, bytes);
debug3("%s: New keys have been sent", __func__);
skip:
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);
+ 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;
- char *p;
- int success = 0;
+ char *p, *msg;
+ int success = 0, tmp1 = -1, tmp2 = -1;
+
+ /* Kludge: ensure there are fds free to receive the pty/tty */
+ if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
+ (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
+ error("%s: cannot allocate fds for pty", __func__);
+ if (tmp1 > 0)
+ close(tmp1);
+ if (tmp2 > 0)
+ close(tmp2);
+ return 0;
+ }
+ close(tmp1);
+ close(tmp2);
buffer_init(&m);
mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &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);
- *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
- *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
+ buffer_append(&loginmsg, msg, strlen(msg));
+ xfree(msg);
+
+ if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
+ (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
+ fatal("%s: receive fds failed", __func__);
/* Success */
return (1);
buffer_free(&m);
/* closed dup'ed master */
- if (close(s->ptymaster) < 0)
- error("close(s->ptymaster): %s", strerror(errno));
+ if (s->ptymaster != -1 && close(s->ptymaster) < 0)
+ error("close(s->ptymaster/%d): %s",
+ s->ptymaster, strerror(errno));
/* unlink pty from session */
s->ttyfd = -1;
#ifdef USE_PAM
void
-mm_start_pam(char *user)
+mm_start_pam(Authctxt *authctxt)
{
Buffer m;
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);
{
Buffer m;
u_int ret;
+ char *msg;
debug3("%s entering", __func__);
if (!options.use_pam)
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);
u_int *num, char ***prompts, u_int **echo_on)
{
Buffer m;
- int i, ret;
+ u_int i;
+ int ret;
debug3("%s", __func__);
buffer_init(&m);
*name = buffer_get_string(&m, NULL);
*info = buffer_get_string(&m, NULL);
*num = buffer_get_int(&m);
- *prompts = xmalloc((*num + 1) * sizeof(char *));
- *echo_on = xmalloc((*num + 1) * sizeof(u_int));
+ 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);
mm_sshpam_respond(void *ctx, u_int num, char **resp)
{
Buffer m;
- int i, ret;
+ u_int i;
+ int ret;
debug3("%s", __func__);
buffer_init(&m);
*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;
}
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;
u_int success;
- char *p, *challenge;
+ char *challenge;
debug3("%s: entering", __func__);
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);
return ((authok == 0) ? -1 : 0);
}
+#endif /* SKEY */
void
mm_ssh1_session_id(u_char session_id[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 oid)
+mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
{
Buffer m;
OM_uint32 major;
*ctx = NULL;
buffer_init(&m);
- buffer_put_string(&m, oid->elements, oid->length);
+ 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);
}
OM_uint32
-mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash) {
- Buffer m;
- OM_uint32 major;
+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);
+ 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);
+ 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, &hash->length);
+ major = buffer_get_int(&m);
+ hash->value = buffer_get_string(&m, &len);
+ hash->length = len;
buffer_free(&m);
-
- return(major);
+
+ return(major);
}
char *
return(0);
}
+
#endif /* GSSAPI */
andersk / gssapi-openssh.git / blobdiff