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-rw-r--r--crypto/heimdal/kcm/connect.c688
1 files changed, 0 insertions, 688 deletions
diff --git a/crypto/heimdal/kcm/connect.c b/crypto/heimdal/kcm/connect.c
deleted file mode 100644
index b3a21aa..0000000
--- a/crypto/heimdal/kcm/connect.c
+++ /dev/null
@@ -1,688 +0,0 @@
-/*
- * Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * 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.
- *
- * 3. Neither the name of the Institute nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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 "kcm_locl.h"
-
-RCSID("$Id: connect.c 16314 2005-11-29 19:03:50Z lha $");
-
-struct descr {
- int s;
- int type;
- char *path;
- unsigned char *buf;
- size_t size;
- size_t len;
- time_t timeout;
- struct sockaddr_storage __ss;
- struct sockaddr *sa;
- socklen_t sock_len;
- kcm_client peercred;
-};
-
-static void
-init_descr(struct descr *d)
-{
- memset(d, 0, sizeof(*d));
- d->sa = (struct sockaddr *)&d->__ss;
- d->s = -1;
-}
-
-/*
- * re-initialize all `n' ->sa in `d'.
- */
-
-static void
-reinit_descrs (struct descr *d, int n)
-{
- int i;
-
- for (i = 0; i < n; ++i)
- d[i].sa = (struct sockaddr *)&d[i].__ss;
-}
-
-/*
- * Update peer credentials from socket.
- *
- * SCM_CREDS can only be updated the first time there is read data to
- * read from the filedescriptor, so if we read do it before this
- * point, the cred data might not be is not there yet.
- */
-
-static int
-update_client_creds(int s, kcm_client *peer)
-{
-#ifdef GETPEERUCRED
- /* Solaris 10 */
- {
- ucred_t *peercred;
-
- if (getpeerucred(s, &peercred) != 0) {
- peer->uid = ucred_geteuid(peercred);
- peer->gid = ucred_getegid(peercred);
- peer->pid = 0;
- ucred_free(peercred);
- return 0;
- }
- }
-#endif
-#ifdef GETPEEREID
- /* FreeBSD, OpenBSD */
- {
- uid_t uid;
- gid_t gid;
-
- if (getpeereid(s, &uid, &gid) == 0) {
- peer->uid = uid;
- peer->gid = gid;
- peer->pid = 0;
- return 0;
- }
- }
-#endif
-#ifdef SO_PEERCRED
- /* Linux */
- {
- struct ucred pc;
- socklen_t pclen = sizeof(pc);
-
- if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, (void *)&pc, &pclen) == 0) {
- peer->uid = pc.uid;
- peer->gid = pc.gid;
- peer->pid = pc.pid;
- return 0;
- }
- }
-#endif
-#if defined(LOCAL_PEERCRED) && defined(XUCRED_VERSION)
- {
- struct xucred peercred;
- socklen_t peercredlen = sizeof(peercred);
-
- if (getsockopt(s, LOCAL_PEERCRED, 1,
- (void *)&peercred, &peercredlen) == 0
- && peercred.cr_version == XUCRED_VERSION)
- {
- peer->uid = peercred.cr_uid;
- peer->gid = peercred.cr_gid;
- peer->pid = 0;
- return 0;
- }
- }
-#endif
-#if defined(SOCKCREDSIZE) && defined(SCM_CREDS)
- /* NetBSD */
- if (peer->uid == -1) {
- struct msghdr msg;
- socklen_t crmsgsize;
- void *crmsg;
- struct cmsghdr *cmp;
- struct sockcred *sc;
-
- memset(&msg, 0, sizeof(msg));
- crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS));
- if (crmsgsize == 0)
- return 1 ;
-
- crmsg = malloc(crmsgsize);
- if (crmsg == NULL)
- goto failed_scm_creds;
-
- memset(crmsg, 0, crmsgsize);
-
- msg.msg_control = crmsg;
- msg.msg_controllen = crmsgsize;
-
- if (recvmsg(s, &msg, 0) < 0) {
- free(crmsg);
- goto failed_scm_creds;
- }
-
- if (msg.msg_controllen == 0 || (msg.msg_flags & MSG_CTRUNC) != 0) {
- free(crmsg);
- goto failed_scm_creds;
- }
-
- cmp = CMSG_FIRSTHDR(&msg);
- if (cmp->cmsg_level != SOL_SOCKET || cmp->cmsg_type != SCM_CREDS) {
- free(crmsg);
- goto failed_scm_creds;
- }
-
- sc = (struct sockcred *)(void *)CMSG_DATA(cmp);
-
- peer->uid = sc->sc_euid;
- peer->gid = sc->sc_egid;
- peer->pid = 0;
-
- free(crmsg);
- return 0;
- } else {
- /* we already got the cred, just return it */
- return 0;
- }
- failed_scm_creds:
-#endif
- krb5_warn(kcm_context, errno, "failed to determine peer identity");
- return 1;
-}
-
-
-/*
- * Create the socket (family, type, port) in `d'
- */
-
-static void
-init_socket(struct descr *d)
-{
- struct sockaddr_un un;
- struct sockaddr *sa = (struct sockaddr *)&un;
- krb5_socklen_t sa_size = sizeof(un);
-
- init_descr (d);
-
- un.sun_family = AF_UNIX;
-
- if (socket_path != NULL)
- d->path = socket_path;
- else
- d->path = _PATH_KCM_SOCKET;
-
- strlcpy(un.sun_path, d->path, sizeof(un.sun_path));
-
- d->s = socket(AF_UNIX, SOCK_STREAM, 0);
- if (d->s < 0){
- krb5_warn(kcm_context, errno, "socket(%d, %d, 0)", AF_UNIX, SOCK_STREAM);
- d->s = -1;
- return;
- }
-#if defined(HAVE_SETSOCKOPT) && defined(SOL_SOCKET) && defined(SO_REUSEADDR)
- {
- int one = 1;
- setsockopt(d->s, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(one));
- }
-#endif
-#ifdef LOCAL_CREDS
- {
- int one = 1;
- setsockopt(d->s, 0, LOCAL_CREDS, (void *)&one, sizeof(one));
- }
-#endif
-
- d->type = SOCK_STREAM;
-
- unlink(d->path);
-
- if (bind(d->s, sa, sa_size) < 0) {
- krb5_warn(kcm_context, errno, "bind %s", un.sun_path);
- close(d->s);
- d->s = -1;
- return;
- }
-
- if (listen(d->s, SOMAXCONN) < 0) {
- krb5_warn(kcm_context, errno, "listen %s", un.sun_path);
- close(d->s);
- d->s = -1;
- return;
- }
-
- chmod(d->path, 0777);
-
- return;
-}
-
-/*
- * Allocate descriptors for all the sockets that we should listen on
- * and return the number of them.
- */
-
-static int
-init_sockets(struct descr **desc)
-{
- struct descr *d;
- size_t num = 0;
-
- d = (struct descr *)malloc(sizeof(*d));
- if (d == NULL) {
- krb5_errx(kcm_context, 1, "malloc failed");
- }
-
- init_socket(d);
- if (d->s != -1) {
- kcm_log(5, "listening on domain socket %s", d->path);
- num++;
- }
-
- reinit_descrs (d, num);
- *desc = d;
-
- return num;
-}
-
-/*
- * handle the request in `buf, len', from `addr' (or `from' as a string),
- * sending a reply in `reply'.
- */
-
-static int
-process_request(unsigned char *buf,
- size_t len,
- krb5_data *reply,
- kcm_client *client)
-{
- krb5_data request;
-
- if (len < 4) {
- kcm_log(1, "malformed request from process %d (too short)",
- client->pid);
- return -1;
- }
-
- if (buf[0] != KCM_PROTOCOL_VERSION_MAJOR ||
- buf[1] != KCM_PROTOCOL_VERSION_MINOR) {
- kcm_log(1, "incorrect protocol version %d.%d from process %d",
- buf[0], buf[1], client->pid);
- return -1;
- }
-
- buf += 2;
- len -= 2;
-
- /* buf is now pointing at opcode */
-
- request.data = buf;
- request.length = len;
-
- return kcm_dispatch(kcm_context, client, &request, reply);
-}
-
-/*
- * Handle the request in `buf, len' to socket `d'
- */
-
-static void
-do_request(void *buf, size_t len, struct descr *d)
-{
- krb5_error_code ret;
- krb5_data reply;
-
- reply.length = 0;
-
- ret = process_request(buf, len, &reply, &d->peercred);
- if (reply.length != 0) {
- unsigned char len[4];
- struct msghdr msghdr;
- struct iovec iov[2];
-
- kcm_log(5, "sending %lu bytes to process %d",
- (unsigned long)reply.length,
- (int)d->peercred.pid);
-
- memset (&msghdr, 0, sizeof(msghdr));
- msghdr.msg_name = NULL;
- msghdr.msg_namelen = 0;
- msghdr.msg_iov = iov;
- msghdr.msg_iovlen = sizeof(iov)/sizeof(*iov);
-#if 0
- msghdr.msg_control = NULL;
- msghdr.msg_controllen = 0;
-#endif
-
- len[0] = (reply.length >> 24) & 0xff;
- len[1] = (reply.length >> 16) & 0xff;
- len[2] = (reply.length >> 8) & 0xff;
- len[3] = reply.length & 0xff;
-
- iov[0].iov_base = (void*)len;
- iov[0].iov_len = 4;
- iov[1].iov_base = reply.data;
- iov[1].iov_len = reply.length;
-
- if (sendmsg (d->s, &msghdr, 0) < 0) {
- kcm_log (0, "sendmsg(%d): %d %s", (int)d->peercred.pid,
- errno, strerror(errno));
- krb5_data_free(&reply);
- return;
- }
-
- krb5_data_free(&reply);
- }
-
- if (ret) {
- kcm_log(0, "Failed processing %lu byte request from process %d",
- (unsigned long)len, d->peercred.pid);
- }
-}
-
-static void
-clear_descr(struct descr *d)
-{
- if(d->buf)
- memset(d->buf, 0, d->size);
- d->len = 0;
- if(d->s != -1)
- close(d->s);
- d->s = -1;
-}
-
-#define STREAM_TIMEOUT 4
-
-/*
- * accept a new stream connection on `d[parent]' and store it in `d[child]'
- */
-
-static void
-add_new_stream (struct descr *d, int parent, int child)
-{
- int s;
-
- if (child == -1)
- return;
-
- d[child].peercred.pid = -1;
- d[child].peercred.uid = -1;
- d[child].peercred.gid = -1;
-
- d[child].sock_len = sizeof(d[child].__ss);
- s = accept(d[parent].s, d[child].sa, &d[child].sock_len);
- if(s < 0) {
- krb5_warn(kcm_context, errno, "accept");
- return;
- }
-
- if (s >= FD_SETSIZE) {
- krb5_warnx(kcm_context, "socket FD too large");
- close (s);
- return;
- }
-
- d[child].s = s;
- d[child].timeout = time(NULL) + STREAM_TIMEOUT;
- d[child].type = SOCK_STREAM;
-}
-
-/*
- * Grow `d' to handle at least `n'.
- * Return != 0 if fails
- */
-
-static int
-grow_descr (struct descr *d, size_t n)
-{
- if (d->size - d->len < n) {
- unsigned char *tmp;
- size_t grow;
-
- grow = max(1024, d->len + n);
- if (d->size + grow > max_request) {
- kcm_log(0, "Request exceeds max request size (%lu bytes).",
- (unsigned long)d->size + grow);
- clear_descr(d);
- return -1;
- }
- tmp = realloc (d->buf, d->size + grow);
- if (tmp == NULL) {
- kcm_log(0, "Failed to re-allocate %lu bytes.",
- (unsigned long)d->size + grow);
- clear_descr(d);
- return -1;
- }
- d->size += grow;
- d->buf = tmp;
- }
- return 0;
-}
-
-/*
- * Handle incoming data to the stream socket in `d[index]'
- */
-
-static void
-handle_stream(struct descr *d, int index, int min_free)
-{
- unsigned char buf[1024];
- int n;
- int ret = 0;
-
- if (d[index].timeout == 0) {
- add_new_stream (d, index, min_free);
- return;
- }
-
- if (update_client_creds(d[index].s, &d[index].peercred)) {
- krb5_warnx(kcm_context, "failed to update peer identity");
- clear_descr(d + index);
- return;
- }
-
- if (d[index].peercred.uid == -1) {
- krb5_warnx(kcm_context, "failed to determine peer identity");
- clear_descr (d + index);
- return;
- }
-
- n = recvfrom(d[index].s, buf, sizeof(buf), 0, NULL, NULL);
- if (n < 0) {
- krb5_warn(kcm_context, errno, "recvfrom");
- return;
- } else if (n == 0) {
- krb5_warnx(kcm_context, "connection closed before end of data "
- "after %lu bytes from process %ld",
- (unsigned long) d[index].len, (long) d[index].peercred.pid);
- clear_descr (d + index);
- return;
- }
- if (grow_descr (&d[index], n))
- return;
- memcpy(d[index].buf + d[index].len, buf, n);
- d[index].len += n;
- if (d[index].len > 4) {
- krb5_storage *sp;
- int32_t len;
-
- sp = krb5_storage_from_mem(d[index].buf, d[index].len);
- if (sp == NULL) {
- kcm_log (0, "krb5_storage_from_mem failed");
- ret = -1;
- } else {
- krb5_ret_int32(sp, &len);
- krb5_storage_free(sp);
- if (d[index].len - 4 >= len) {
- memmove(d[index].buf, d[index].buf + 4, d[index].len - 4);
- ret = 1;
- } else
- ret = 0;
- }
- }
- if (ret < 0)
- return;
- else if (ret == 1) {
- do_request(d[index].buf, d[index].len, &d[index]);
- clear_descr(d + index);
- }
-}
-
-#ifdef HAVE_DOOR_CREATE
-
-static void
-kcm_door_server(void *cookie, char *argp, size_t arg_size,
- door_desc_t *dp, uint_t n_desc)
-{
- kcm_client peercred;
- door_cred_t cred;
- krb5_error_code ret;
- krb5_data reply;
- size_t length;
- char *p;
-
- reply.length = 0;
-
- p = NULL;
- length = 0;
-
- if (door_cred(&cred) != 0) {
- kcm_log(0, "door_cred failed with %s", strerror(errno));
- goto out;
- }
-
- peercred.uid = cred.dc_euid;
- peercred.gid = cred.dc_egid;
- peercred.pid = cred.dc_pid;
-
- ret = process_request((unsigned char*)argp, arg_size, &reply, &peercred);
- if (reply.length != 0) {
- p = alloca(reply.length); /* XXX don't use alloca */
- if (p) {
- memcpy(p, reply.data, reply.length);
- length = reply.length;
- }
- krb5_data_free(&reply);
- }
-
- out:
- door_return(p, length, NULL, 0);
-}
-
-static void
-kcm_setup_door(void)
-{
- int fd, ret;
- char *path;
-
- fd = door_create(kcm_door_server, NULL, 0);
- if (fd < 0)
- krb5_err(kcm_context, 1, errno, "Failed to create door");
-
- if (door_path != NULL)
- path = door_path;
- else
- path = _PATH_KCM_DOOR;
-
- unlink(path);
- ret = open(path, O_RDWR | O_CREAT, 0666);
- if (ret < 0)
- krb5_err(kcm_context, 1, errno, "Failed to create/open door");
- close(ret);
-
- ret = fattach(fd, path);
- if (ret < 0)
- krb5_err(kcm_context, 1, errno, "Failed to attach door");
-
-}
-#endif /* HAVE_DOOR_CREATE */
-
-
-void
-kcm_loop(void)
-{
- struct descr *d;
- int ndescr;
-
-#ifdef HAVE_DOOR_CREATE
- kcm_setup_door();
-#endif
-
- ndescr = init_sockets(&d);
- if (ndescr <= 0) {
- krb5_warnx(kcm_context, "No sockets!");
-#ifndef HAVE_DOOR_CREATE
- exit(1);
-#endif
- }
- while (exit_flag == 0){
- struct timeval tmout;
- fd_set fds;
- int min_free = -1;
- int max_fd = 0;
- int i;
-
- FD_ZERO(&fds);
- for(i = 0; i < ndescr; i++) {
- if (d[i].s >= 0){
- if(d[i].type == SOCK_STREAM &&
- d[i].timeout && d[i].timeout < time(NULL)) {
- kcm_log(1, "Stream connection from %d expired after %lu bytes",
- d[i].peercred.pid, (unsigned long)d[i].len);
- clear_descr(&d[i]);
- continue;
- }
- if (max_fd < d[i].s)
- max_fd = d[i].s;
- if (max_fd >= FD_SETSIZE)
- krb5_errx(kcm_context, 1, "fd too large");
- FD_SET(d[i].s, &fds);
- } else if (min_free < 0 || i < min_free)
- min_free = i;
- }
- if (min_free == -1) {
- struct descr *tmp;
- tmp = realloc(d, (ndescr + 4) * sizeof(*d));
- if(tmp == NULL)
- krb5_warnx(kcm_context, "No memory");
- else {
- d = tmp;
- reinit_descrs (d, ndescr);
- memset(d + ndescr, 0, 4 * sizeof(*d));
- for(i = ndescr; i < ndescr + 4; i++)
- init_descr (&d[i]);
- min_free = ndescr;
- ndescr += 4;
- }
- }
-
- tmout.tv_sec = STREAM_TIMEOUT;
- tmout.tv_usec = 0;
- switch (select(max_fd + 1, &fds, 0, 0, &tmout)){
- case 0:
- kcm_run_events(kcm_context, time(NULL));
- break;
- case -1:
- if (errno != EINTR)
- krb5_warn(kcm_context, errno, "select");
- break;
- default:
- for(i = 0; i < ndescr; i++) {
- if(d[i].s >= 0 && FD_ISSET(d[i].s, &fds)) {
- if (d[i].type == SOCK_STREAM)
- handle_stream(d, i, min_free);
- }
- }
- kcm_run_events(kcm_context, time(NULL));
- break;
- }
- }
- if (d->path != NULL)
- unlink(d->path);
- free(d);
-}
-
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