*/
#include "includes.h"
-RCSID("$OpenBSD: monitor_wrap.c,v 1.11 2002/06/19 18:01:00 markus Exp $");
+RCSID("$OpenBSD: monitor_wrap.c,v 1.35 2003/11/17 11:06:07 markus Exp $");
#include <openssl/bn.h>
#include <openssl/dh.h>
#include "dh.h"
#include "kex.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"
#include "monitor_wrap.h"
#include "xmalloc.h"
#include "atomicio.h"
#include "monitor_fdpass.h"
#include "getput.h"
+#include "servconf.h"
#include "auth.h"
#include "channels.h"
#include "session.h"
+#ifdef GSSAPI
+#include "ssh-gss.h"
+#endif
+
/* Imports */
extern int compat20;
extern Newkeys *newkeys[];
extern z_stream outgoing_stream;
extern struct monitor *pmonitor;
extern Buffer input, output;
+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)
{
- u_char buf[5];
u_int mlen = buffer_len(m);
+ u_char buf[5];
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))
+ if (atomicio(vwrite, socket, buf, sizeof(buf)) != sizeof(buf))
fatal("%s: write", __func__);
- if (atomicio(write, socket, buffer_ptr(m), mlen) != mlen)
+ if (atomicio(vwrite, socket, buffer_ptr(m), mlen) != mlen)
fatal("%s: write", __func__);
}
mm_request_receive(int socket, Buffer *m)
{
u_char buf[4];
- ssize_t res;
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)
- fatal_cleanup();
+ cleanup_exit(255);
fatal("%s: read: %ld", __func__, (long)res);
}
msg_len = GET_32BIT(buf);
return (pw);
}
-char* mm_auth2_read_banner(void)
+char *
+mm_auth2_read_banner(void)
{
Buffer m;
char *banner;
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);
}
Buffer m;
u_char *blob;
u_int len;
- int allowed = 0;
+ int allowed = 0, have_forced = 0;
debug3("%s entering", __func__);
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);
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", __func__,
+ fatal("%s: bad ivlen: expected %u != %u", __func__,
enc->block_size, len);
if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
mac->enabled = buffer_get_int(&b);
mac->key = buffer_get_string(&b, &len);
if (len > mac->key_len)
- fatal("%s: bad mac key length: %d > %d", __func__, len,
+ fatal("%s: bad mac key length: %u > %d", __func__, len,
mac->key_len);
mac->key_len = len;
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);
}
{
Buffer b;
int len;
- u_char *buf;
Enc *enc;
Mac *mac;
Comp *comp;
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;
}
Buffer m;
u_char *blob, *p;
u_int bloblen, plen;
+ u_int32_t seqnr, packets;
+ u_int64_t blocks;
buffer_init(&m);
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", __func__);
skip:
mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
{
Buffer m;
- u_char *p;
+ char *p;
int success = 0;
buffer_init(&m);
}
void
-mm_session_pty_cleanup2(void *session)
+mm_session_pty_cleanup2(Session *s)
{
- Session *s = session;
Buffer m;
if (s->ttyfd == -1)
#ifdef USE_PAM
void
-mm_start_pam(char *user)
+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);
- 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;
+
+ 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);
+
+ 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;
+ int i, 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);
+ *prompts = xmalloc((*num + 1) * sizeof(char *));
+ *echo_on = xmalloc((*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;
+ int i, 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 */
*name = xstrdup("");
*infotxt = xstrdup("");
*numprompts = 1;
- *prompts = xmalloc(*numprompts * sizeof(char*));
+ *prompts = xmalloc(*numprompts * sizeof(char *));
*echo_on = xmalloc(*numprompts * sizeof(u_int));
(*echo_on)[0] = 0;
}
u_int *numprompts, char ***prompts, u_int **echo_on)
{
Buffer m;
- int res;
+ u_int success;
char *challenge;
debug3("%s: entering", __func__);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
&m);
- res = buffer_get_int(&m);
- if (res == -1) {
+ success = buffer_get_int(&m);
+ if (success == 0) {
debug3("%s: no challenge", __func__);
buffer_free(&m);
return (-1);
u_int *numprompts, char ***prompts, u_int **echo_on)
{
Buffer m;
- int len, res;
+ int len;
+ u_int success;
char *p, *challenge;
debug3("%s: entering", __func__);
mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
&m);
- res = buffer_get_int(&m);
- if (res == -1) {
+ success = buffer_get_int(&m);
+ if (success == 0) {
debug3("%s: no challenge", __func__);
buffer_free(&m);
return (-1);
Key *key;
u_char *blob;
u_int blen;
- int allowed = 0;
+ int allowed = 0, have_forced = 0;
debug3("%s entering", __func__);
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)
return (success);
}
+
+#ifdef GSSAPI
+OM_uint32
+mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID oid)
+{
+ Buffer m;
+ OM_uint32 major;
+
+ /* Client doesn't get to see the context */
+ *ctx = NULL;
+
+ buffer_init(&m);
+ buffer_put_string(&m, oid->elements, oid->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 */
andersk / gssapi-openssh.git / blobdiff