--- /dev/null
+/*
+ * Copyright (c) 2000, 2001 Markus Friedl. 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: sftp-server.c,v 1.30 2001/07/31 12:42:50 jakob Exp $");
+
+#include "buffer.h"
+#include "bufaux.h"
+#include "getput.h"
+#include "log.h"
+#include "xmalloc.h"
+
+#include "sftp.h"
+#include "sftp-common.h"
+
+/* helper */
+#define get_int64() buffer_get_int64(&iqueue);
+#define get_int() buffer_get_int(&iqueue);
+#define get_string(lenp) buffer_get_string(&iqueue, lenp);
+#define TRACE debug
+
+#ifdef HAVE___PROGNAME
+extern char *__progname;
+#else
+char *__progname;
+#endif
+
+/* input and output queue */
+Buffer iqueue;
+Buffer oqueue;
+
+/* Version of client */
+int version;
+
+/* portable attibutes, etc. */
+
+typedef struct Stat Stat;
+
+struct Stat {
+ char *name;
+ char *long_name;
+ Attrib attrib;
+};
+
+static int
+errno_to_portable(int unixerrno)
+{
+ int ret = 0;
+
+ switch (unixerrno) {
+ case 0:
+ ret = SSH2_FX_OK;
+ break;
+ case ENOENT:
+ case ENOTDIR:
+ case EBADF:
+ case ELOOP:
+ ret = SSH2_FX_NO_SUCH_FILE;
+ break;
+ case EPERM:
+ case EACCES:
+ case EFAULT:
+ ret = SSH2_FX_PERMISSION_DENIED;
+ break;
+ case ENAMETOOLONG:
+ case EINVAL:
+ ret = SSH2_FX_BAD_MESSAGE;
+ break;
+ default:
+ ret = SSH2_FX_FAILURE;
+ break;
+ }
+ return ret;
+}
+
+static int
+flags_from_portable(int pflags)
+{
+ int flags = 0;
+
+ if ((pflags & SSH2_FXF_READ) &&
+ (pflags & SSH2_FXF_WRITE)) {
+ flags = O_RDWR;
+ } else if (pflags & SSH2_FXF_READ) {
+ flags = O_RDONLY;
+ } else if (pflags & SSH2_FXF_WRITE) {
+ flags = O_WRONLY;
+ }
+ if (pflags & SSH2_FXF_CREAT)
+ flags |= O_CREAT;
+ if (pflags & SSH2_FXF_TRUNC)
+ flags |= O_TRUNC;
+ if (pflags & SSH2_FXF_EXCL)
+ flags |= O_EXCL;
+ return flags;
+}
+
+static Attrib *
+get_attrib(void)
+{
+ return decode_attrib(&iqueue);
+}
+
+/* handle handles */
+
+typedef struct Handle Handle;
+struct Handle {
+ int use;
+ DIR *dirp;
+ int fd;
+ char *name;
+};
+
+enum {
+ HANDLE_UNUSED,
+ HANDLE_DIR,
+ HANDLE_FILE
+};
+
+Handle handles[100];
+
+static void
+handle_init(void)
+{
+ int i;
+
+ for(i = 0; i < sizeof(handles)/sizeof(Handle); i++)
+ handles[i].use = HANDLE_UNUSED;
+}
+
+static int
+handle_new(int use, char *name, int fd, DIR *dirp)
+{
+ int i;
+
+ for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) {
+ if (handles[i].use == HANDLE_UNUSED) {
+ handles[i].use = use;
+ handles[i].dirp = dirp;
+ handles[i].fd = fd;
+ handles[i].name = name;
+ return i;
+ }
+ }
+ return -1;
+}
+
+static int
+handle_is_ok(int i, int type)
+{
+ return i >= 0 && i < sizeof(handles)/sizeof(Handle) &&
+ handles[i].use == type;
+}
+
+static int
+handle_to_string(int handle, char **stringp, int *hlenp)
+{
+ if (stringp == NULL || hlenp == NULL)
+ return -1;
+ *stringp = xmalloc(sizeof(int32_t));
+ PUT_32BIT(*stringp, handle);
+ *hlenp = sizeof(int32_t);
+ return 0;
+}
+
+static int
+handle_from_string(char *handle, u_int hlen)
+{
+ int val;
+
+ if (hlen != sizeof(int32_t))
+ return -1;
+ val = GET_32BIT(handle);
+ if (handle_is_ok(val, HANDLE_FILE) ||
+ handle_is_ok(val, HANDLE_DIR))
+ return val;
+ return -1;
+}
+
+static char *
+handle_to_name(int handle)
+{
+ if (handle_is_ok(handle, HANDLE_DIR)||
+ handle_is_ok(handle, HANDLE_FILE))
+ return handles[handle].name;
+ return NULL;
+}
+
+static DIR *
+handle_to_dir(int handle)
+{
+ if (handle_is_ok(handle, HANDLE_DIR))
+ return handles[handle].dirp;
+ return NULL;
+}
+
+static int
+handle_to_fd(int handle)
+{
+ if (handle_is_ok(handle, HANDLE_FILE))
+ return handles[handle].fd;
+ return -1;
+}
+
+static int
+handle_close(int handle)
+{
+ int ret = -1;
+
+ if (handle_is_ok(handle, HANDLE_FILE)) {
+ ret = close(handles[handle].fd);
+ handles[handle].use = HANDLE_UNUSED;
+ } else if (handle_is_ok(handle, HANDLE_DIR)) {
+ ret = closedir(handles[handle].dirp);
+ handles[handle].use = HANDLE_UNUSED;
+ } else {
+ errno = ENOENT;
+ }
+ return ret;
+}
+
+static int
+get_handle(void)
+{
+ char *handle;
+ int val = -1;
+ u_int hlen;
+
+ handle = get_string(&hlen);
+ if (hlen < 256)
+ val = handle_from_string(handle, hlen);
+ xfree(handle);
+ return val;
+}
+
+/* send replies */
+
+static void
+send_msg(Buffer *m)
+{
+ int mlen = buffer_len(m);
+
+ buffer_put_int(&oqueue, mlen);
+ buffer_append(&oqueue, buffer_ptr(m), mlen);
+ buffer_consume(m, mlen);
+}
+
+static void
+send_status(u_int32_t id, u_int32_t error)
+{
+ Buffer msg;
+ const char *status_messages[] = {
+ "Success", /* SSH_FX_OK */
+ "End of file", /* SSH_FX_EOF */
+ "No such file", /* SSH_FX_NO_SUCH_FILE */
+ "Permission denied", /* SSH_FX_PERMISSION_DENIED */
+ "Failure", /* SSH_FX_FAILURE */
+ "Bad message", /* SSH_FX_BAD_MESSAGE */
+ "No connection", /* SSH_FX_NO_CONNECTION */
+ "Connection lost", /* SSH_FX_CONNECTION_LOST */
+ "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */
+ "Unknown error" /* Others */
+ };
+
+ TRACE("sent status id %d error %d", id, error);
+ buffer_init(&msg);
+ buffer_put_char(&msg, SSH2_FXP_STATUS);
+ buffer_put_int(&msg, id);
+ buffer_put_int(&msg, error);
+ if (version >= 3) {
+ buffer_put_cstring(&msg,
+ status_messages[MIN(error,SSH2_FX_MAX)]);
+ buffer_put_cstring(&msg, "");
+ }
+ send_msg(&msg);
+ buffer_free(&msg);
+}
+static void
+send_data_or_handle(char type, u_int32_t id, char *data, int dlen)
+{
+ Buffer msg;
+
+ buffer_init(&msg);
+ buffer_put_char(&msg, type);
+ buffer_put_int(&msg, id);
+ buffer_put_string(&msg, data, dlen);
+ send_msg(&msg);
+ buffer_free(&msg);
+}
+
+static void
+send_data(u_int32_t id, char *data, int dlen)
+{
+ TRACE("sent data id %d len %d", id, dlen);
+ send_data_or_handle(SSH2_FXP_DATA, id, data, dlen);
+}
+
+static void
+send_handle(u_int32_t id, int handle)
+{
+ char *string;
+ int hlen;
+
+ handle_to_string(handle, &string, &hlen);
+ TRACE("sent handle id %d handle %d", id, handle);
+ send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen);
+ xfree(string);
+}
+
+static void
+send_names(u_int32_t id, int count, Stat *stats)
+{
+ Buffer msg;
+ int i;
+
+ buffer_init(&msg);
+ buffer_put_char(&msg, SSH2_FXP_NAME);
+ buffer_put_int(&msg, id);
+ buffer_put_int(&msg, count);
+ TRACE("sent names id %d count %d", id, count);
+ for (i = 0; i < count; i++) {
+ buffer_put_cstring(&msg, stats[i].name);
+ buffer_put_cstring(&msg, stats[i].long_name);
+ encode_attrib(&msg, &stats[i].attrib);
+ }
+ send_msg(&msg);
+ buffer_free(&msg);
+}
+
+static void
+send_attrib(u_int32_t id, Attrib *a)
+{
+ Buffer msg;
+
+ TRACE("sent attrib id %d have 0x%x", id, a->flags);
+ buffer_init(&msg);
+ buffer_put_char(&msg, SSH2_FXP_ATTRS);
+ buffer_put_int(&msg, id);
+ encode_attrib(&msg, a);
+ send_msg(&msg);
+ buffer_free(&msg);
+}
+
+/* parse incoming */
+
+static void
+process_init(void)
+{
+ Buffer msg;
+
+ version = buffer_get_int(&iqueue);
+ TRACE("client version %d", version);
+ buffer_init(&msg);
+ buffer_put_char(&msg, SSH2_FXP_VERSION);
+ buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
+ send_msg(&msg);
+ buffer_free(&msg);
+}
+
+static void
+process_open(void)
+{
+ u_int32_t id, pflags;
+ Attrib *a;
+ char *name;
+ int handle, fd, flags, mode, status = SSH2_FX_FAILURE;
+
+ id = get_int();
+ name = get_string(NULL);
+ pflags = get_int(); /* portable flags */
+ a = get_attrib();
+ flags = flags_from_portable(pflags);
+ mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666;
+ TRACE("open id %d name %s flags %d mode 0%o", id, name, pflags, mode);
+ fd = open(name, flags, mode);
+ if (fd < 0) {
+ status = errno_to_portable(errno);
+ } else {
+ handle = handle_new(HANDLE_FILE, xstrdup(name), fd, NULL);
+ if (handle < 0) {
+ close(fd);
+ } else {
+ send_handle(id, handle);
+ status = SSH2_FX_OK;
+ }
+ }
+ if (status != SSH2_FX_OK)
+ send_status(id, status);
+ xfree(name);
+}
+
+static void
+process_close(void)
+{
+ u_int32_t id;
+ int handle, ret, status = SSH2_FX_FAILURE;
+
+ id = get_int();
+ handle = get_handle();
+ TRACE("close id %d handle %d", id, handle);
+ ret = handle_close(handle);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
+ send_status(id, status);
+}
+
+static void
+process_read(void)
+{
+ char buf[64*1024];
+ u_int32_t id, len;
+ int handle, fd, ret, status = SSH2_FX_FAILURE;
+ u_int64_t off;
+
+ id = get_int();
+ handle = get_handle();
+ off = get_int64();
+ len = get_int();
+
+ TRACE("read id %d handle %d off %llu len %d", id, handle,
+ (u_int64_t)off, len);
+ if (len > sizeof buf) {
+ len = sizeof buf;
+ log("read change len %d", len);
+ }
+ fd = handle_to_fd(handle);
+ if (fd >= 0) {
+ if (lseek(fd, off, SEEK_SET) < 0) {
+ error("process_read: seek failed");
+ status = errno_to_portable(errno);
+ } else {
+ ret = read(fd, buf, len);
+ if (ret < 0) {
+ status = errno_to_portable(errno);
+ } else if (ret == 0) {
+ status = SSH2_FX_EOF;
+ } else {
+ send_data(id, buf, ret);
+ status = SSH2_FX_OK;
+ }
+ }
+ }
+ if (status != SSH2_FX_OK)
+ send_status(id, status);
+}
+
+static void
+process_write(void)
+{
+ u_int32_t id;
+ u_int64_t off;
+ u_int len;
+ int handle, fd, ret, status = SSH2_FX_FAILURE;
+ char *data;
+
+ id = get_int();
+ handle = get_handle();
+ off = get_int64();
+ data = get_string(&len);
+
+ TRACE("write id %d handle %d off %llu len %d", id, handle,
+ (u_int64_t)off, len);
+ fd = handle_to_fd(handle);
+ if (fd >= 0) {
+ if (lseek(fd, off, SEEK_SET) < 0) {
+ status = errno_to_portable(errno);
+ error("process_write: seek failed");
+ } else {
+/* XXX ATOMICIO ? */
+ ret = write(fd, data, len);
+ if (ret == -1) {
+ error("process_write: write failed");
+ status = errno_to_portable(errno);
+ } else if (ret == len) {
+ status = SSH2_FX_OK;
+ } else {
+ log("nothing at all written");
+ }
+ }
+ }
+ send_status(id, status);
+ xfree(data);
+}
+
+static void
+process_do_stat(int do_lstat)
+{
+ Attrib a;
+ struct stat st;
+ u_int32_t id;
+ char *name;
+ int ret, status = SSH2_FX_FAILURE;
+
+ id = get_int();
+ name = get_string(NULL);
+ TRACE("%sstat id %d name %s", do_lstat ? "l" : "", id, name);
+ ret = do_lstat ? lstat(name, &st) : stat(name, &st);
+ if (ret < 0) {
+ status = errno_to_portable(errno);
+ } else {
+ stat_to_attrib(&st, &a);
+ send_attrib(id, &a);
+ status = SSH2_FX_OK;
+ }
+ if (status != SSH2_FX_OK)
+ send_status(id, status);
+ xfree(name);
+}
+
+static void
+process_stat(void)
+{
+ process_do_stat(0);
+}
+
+static void
+process_lstat(void)
+{
+ process_do_stat(1);
+}
+
+static void
+process_fstat(void)
+{
+ Attrib a;
+ struct stat st;
+ u_int32_t id;
+ int fd, ret, handle, status = SSH2_FX_FAILURE;
+
+ id = get_int();
+ handle = get_handle();
+ TRACE("fstat id %d handle %d", id, handle);
+ fd = handle_to_fd(handle);
+ if (fd >= 0) {
+ ret = fstat(fd, &st);
+ if (ret < 0) {
+ status = errno_to_portable(errno);
+ } else {
+ stat_to_attrib(&st, &a);
+ send_attrib(id, &a);
+ status = SSH2_FX_OK;
+ }
+ }
+ if (status != SSH2_FX_OK)
+ send_status(id, status);
+}
+
+static struct timeval *
+attrib_to_tv(Attrib *a)
+{
+ static struct timeval tv[2];
+
+ tv[0].tv_sec = a->atime;
+ tv[0].tv_usec = 0;
+ tv[1].tv_sec = a->mtime;
+ tv[1].tv_usec = 0;
+ return tv;
+}
+
+static void
+process_setstat(void)
+{
+ Attrib *a;
+ u_int32_t id;
+ char *name;
+ int ret;
+ int status = SSH2_FX_OK;
+
+ id = get_int();
+ name = get_string(NULL);
+ a = get_attrib();
+ TRACE("setstat id %d name %s", id, name);
+ if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
+ ret = chmod(name, a->perm & 0777);
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
+ if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
+ ret = utimes(name, attrib_to_tv(a));
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
+ if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
+ ret = chown(name, a->uid, a->gid);
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
+ send_status(id, status);
+ xfree(name);
+}
+
+static void
+process_fsetstat(void)
+{
+ Attrib *a;
+ u_int32_t id;
+ int handle, fd, ret;
+ int status = SSH2_FX_OK;
+ char *name;
+
+ id = get_int();
+ handle = get_handle();
+ a = get_attrib();
+ TRACE("fsetstat id %d handle %d", id, handle);
+ fd = handle_to_fd(handle);
+ name = handle_to_name(handle);
+ if (fd < 0 || name == NULL) {
+ status = SSH2_FX_FAILURE;
+ } else {
+ if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
+#ifdef HAVE_FCHMOD
+ ret = fchmod(fd, a->perm & 0777);
+#else
+ ret = chmod(name, a->perm & 0777);
+#endif
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
+ if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
+#ifdef HAVE_FUTIMES
+ ret = futimes(fd, attrib_to_tv(a));
+#else
+ ret = utimes(name, attrib_to_tv(a));
+#endif
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
+ if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
+#ifdef HAVE_FCHOWN
+ ret = fchown(fd, a->uid, a->gid);
+#else
+ ret = chown(name, a->uid, a->gid);
+#endif
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
+ }
+ send_status(id, status);
+}
+
+static void
+process_opendir(void)
+{
+ DIR *dirp = NULL;
+ char *path;
+ int handle, status = SSH2_FX_FAILURE;
+ u_int32_t id;
+
+ id = get_int();
+ path = get_string(NULL);
+ TRACE("opendir id %d path %s", id, path);
+ dirp = opendir(path);
+ if (dirp == NULL) {
+ status = errno_to_portable(errno);
+ } else {
+ handle = handle_new(HANDLE_DIR, xstrdup(path), 0, dirp);
+ if (handle < 0) {
+ closedir(dirp);
+ } else {
+ send_handle(id, handle);
+ status = SSH2_FX_OK;
+ }
+
+ }
+ if (status != SSH2_FX_OK)
+ send_status(id, status);
+ xfree(path);
+}
+
+/*
+ * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh
+ */
+static char *
+ls_file(char *name, struct stat *st)
+{
+ int ulen, glen, sz = 0;
+ struct passwd *pw;
+ struct group *gr;
+ struct tm *ltime = localtime(&st->st_mtime);
+ char *user, *group;
+ char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
+
+ strmode(st->st_mode, mode);
+ if ((pw = getpwuid(st->st_uid)) != NULL) {
+ user = pw->pw_name;
+ } else {
+ snprintf(ubuf, sizeof ubuf, "%d", st->st_uid);
+ user = ubuf;
+ }
+ if ((gr = getgrgid(st->st_gid)) != NULL) {
+ group = gr->gr_name;
+ } else {
+ snprintf(gbuf, sizeof gbuf, "%d", st->st_gid);
+ group = gbuf;
+ }
+ if (ltime != NULL) {
+ if (time(NULL) - st->st_mtime < (365*24*60*60)/2)
+ sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
+ else
+ sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime);
+ }
+ if (sz == 0)
+ tbuf[0] = '\0';
+ ulen = MAX(strlen(user), 8);
+ glen = MAX(strlen(group), 8);
+ snprintf(buf, sizeof buf, "%s %3d %-*s %-*s %8llu %s %s", mode,
+ st->st_nlink, ulen, user, glen, group,
+ (u_int64_t)st->st_size, tbuf, name);
+ return xstrdup(buf);
+}
+
+static void
+process_readdir(void)
+{
+ DIR *dirp;
+ struct dirent *dp;
+ char *path;
+ int handle;
+ u_int32_t id;
+
+ id = get_int();
+ handle = get_handle();
+ TRACE("readdir id %d handle %d", id, handle);
+ dirp = handle_to_dir(handle);
+ path = handle_to_name(handle);
+ if (dirp == NULL || path == NULL) {
+ send_status(id, SSH2_FX_FAILURE);
+ } else {
+ struct stat st;
+ char pathname[1024];
+ Stat *stats;
+ int nstats = 10, count = 0, i;
+ stats = xmalloc(nstats * sizeof(Stat));
+ while ((dp = readdir(dirp)) != NULL) {
+ if (count >= nstats) {
+ nstats *= 2;
+ stats = xrealloc(stats, nstats * sizeof(Stat));
+ }
+/* XXX OVERFLOW ? */
+ snprintf(pathname, sizeof pathname, "%s%s%s", path,
+ strcmp(path, "/") ? "/" : "", dp->d_name);
+ if (lstat(pathname, &st) < 0)
+ continue;
+ stat_to_attrib(&st, &(stats[count].attrib));
+ stats[count].name = xstrdup(dp->d_name);
+ stats[count].long_name = ls_file(dp->d_name, &st);
+ count++;
+ /* send up to 100 entries in one message */
+ /* XXX check packet size instead */
+ if (count == 100)
+ break;
+ }
+ if (count > 0) {
+ send_names(id, count, stats);
+ for(i = 0; i < count; i++) {
+ xfree(stats[i].name);
+ xfree(stats[i].long_name);
+ }
+ } else {
+ send_status(id, SSH2_FX_EOF);
+ }
+ xfree(stats);
+ }
+}
+
+static void
+process_remove(void)
+{
+ char *name;
+ u_int32_t id;
+ int status = SSH2_FX_FAILURE;
+ int ret;
+
+ id = get_int();
+ name = get_string(NULL);
+ TRACE("remove id %d name %s", id, name);
+ ret = unlink(name);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
+ send_status(id, status);
+ xfree(name);
+}
+
+static void
+process_mkdir(void)
+{
+ Attrib *a;
+ u_int32_t id;
+ char *name;
+ int ret, mode, status = SSH2_FX_FAILURE;
+
+ id = get_int();
+ name = get_string(NULL);
+ a = get_attrib();
+ mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ?
+ a->perm & 0777 : 0777;
+ TRACE("mkdir id %d name %s mode 0%o", id, name, mode);
+ ret = mkdir(name, mode);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
+ send_status(id, status);
+ xfree(name);
+}
+
+static void
+process_rmdir(void)
+{
+ u_int32_t id;
+ char *name;
+ int ret, status;
+
+ id = get_int();
+ name = get_string(NULL);
+ TRACE("rmdir id %d name %s", id, name);
+ ret = rmdir(name);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
+ send_status(id, status);
+ xfree(name);
+}
+
+static void
+process_realpath(void)
+{
+ char resolvedname[MAXPATHLEN];
+ u_int32_t id;
+ char *path;
+
+ id = get_int();
+ path = get_string(NULL);
+ if (path[0] == '\0') {
+ xfree(path);
+ path = xstrdup(".");
+ }
+ TRACE("realpath id %d path %s", id, path);
+ if (realpath(path, resolvedname) == NULL) {
+ send_status(id, errno_to_portable(errno));
+ } else {
+ Stat s;
+ attrib_clear(&s.attrib);
+ s.name = s.long_name = resolvedname;
+ send_names(id, 1, &s);
+ }
+ xfree(path);
+}
+
+static void
+process_rename(void)
+{
+ u_int32_t id;
+ struct stat st;
+ char *oldpath, *newpath;
+ int ret, status = SSH2_FX_FAILURE;
+
+ id = get_int();
+ oldpath = get_string(NULL);
+ newpath = get_string(NULL);
+ TRACE("rename id %d old %s new %s", id, oldpath, newpath);
+ /* fail if 'newpath' exists */
+ if (stat(newpath, &st) == -1) {
+ ret = rename(oldpath, newpath);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
+ }
+ send_status(id, status);
+ xfree(oldpath);
+ xfree(newpath);
+}
+
+static void
+process_readlink(void)
+{
+ u_int32_t id;
+ int len;
+ char link[MAXPATHLEN];
+ char *path;
+
+ id = get_int();
+ path = get_string(NULL);
+ TRACE("readlink id %d path %s", id, path);
+ if ((len = readlink(path, link, sizeof(link) - 1)) == -1)
+ send_status(id, errno_to_portable(errno));
+ else {
+ Stat s;
+
+ link[len] = '\0';
+ attrib_clear(&s.attrib);
+ s.name = s.long_name = link;
+ send_names(id, 1, &s);
+ }
+ xfree(path);
+}
+
+static void
+process_symlink(void)
+{
+ u_int32_t id;
+ struct stat st;
+ char *oldpath, *newpath;
+ int ret, status = SSH2_FX_FAILURE;
+
+ id = get_int();
+ oldpath = get_string(NULL);
+ newpath = get_string(NULL);
+ TRACE("symlink id %d old %s new %s", id, oldpath, newpath);
+ /* fail if 'newpath' exists */
+ if (stat(newpath, &st) == -1) {
+ ret = symlink(oldpath, newpath);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
+ }
+ send_status(id, status);
+ xfree(oldpath);
+ xfree(newpath);
+}
+
+static void
+process_extended(void)
+{
+ u_int32_t id;
+ char *request;
+
+ id = get_int();
+ request = get_string(NULL);
+ send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */
+ xfree(request);
+}
+
+/* stolen from ssh-agent */
+
+static void
+process(void)
+{
+ u_int msg_len;
+ u_int type;
+ u_char *cp;
+
+ if (buffer_len(&iqueue) < 5)
+ return; /* Incomplete message. */
+ cp = (u_char *) buffer_ptr(&iqueue);
+ msg_len = GET_32BIT(cp);
+ if (msg_len > 256 * 1024) {
+ error("bad message ");
+ exit(11);
+ }
+ if (buffer_len(&iqueue) < msg_len + 4)
+ return;
+ buffer_consume(&iqueue, 4);
+ type = buffer_get_char(&iqueue);
+ switch (type) {
+ case SSH2_FXP_INIT:
+ process_init();
+ break;
+ case SSH2_FXP_OPEN:
+ process_open();
+ break;
+ case SSH2_FXP_CLOSE:
+ process_close();
+ break;
+ case SSH2_FXP_READ:
+ process_read();
+ break;
+ case SSH2_FXP_WRITE:
+ process_write();
+ break;
+ case SSH2_FXP_LSTAT:
+ process_lstat();
+ break;
+ case SSH2_FXP_FSTAT:
+ process_fstat();
+ break;
+ case SSH2_FXP_SETSTAT:
+ process_setstat();
+ break;
+ case SSH2_FXP_FSETSTAT:
+ process_fsetstat();
+ break;
+ case SSH2_FXP_OPENDIR:
+ process_opendir();
+ break;
+ case SSH2_FXP_READDIR:
+ process_readdir();
+ break;
+ case SSH2_FXP_REMOVE:
+ process_remove();
+ break;
+ case SSH2_FXP_MKDIR:
+ process_mkdir();
+ break;
+ case SSH2_FXP_RMDIR:
+ process_rmdir();
+ break;
+ case SSH2_FXP_REALPATH:
+ process_realpath();
+ break;
+ case SSH2_FXP_STAT:
+ process_stat();
+ break;
+ case SSH2_FXP_RENAME:
+ process_rename();
+ break;
+ case SSH2_FXP_READLINK:
+ process_readlink();
+ break;
+ case SSH2_FXP_SYMLINK:
+ process_symlink();
+ break;
+ case SSH2_FXP_EXTENDED:
+ process_extended();
+ break;
+ default:
+ error("Unknown message %d", type);
+ break;
+ }
+}
+
+int
+main(int ac, char **av)
+{
+ fd_set *rset, *wset;
+ int in, out, max;
+ ssize_t len, olen, set_size;
+
+ /* XXX should use getopt */
+
+ __progname = get_progname(av[0]);
+ handle_init();
+
+#ifdef DEBUG_SFTP_SERVER
+ log_init("sftp-server", SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 0);
+#endif
+
+ in = dup(STDIN_FILENO);
+ out = dup(STDOUT_FILENO);
+
+#ifdef HAVE_CYGWIN
+ setmode(in, O_BINARY);
+ setmode(out, O_BINARY);
+#endif
+
+ max = 0;
+ if (in > max)
+ max = in;
+ if (out > max)
+ max = out;
+
+ buffer_init(&iqueue);
+ buffer_init(&oqueue);
+
+ set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask);
+ rset = (fd_set *)xmalloc(set_size);
+ wset = (fd_set *)xmalloc(set_size);
+
+ for (;;) {
+ memset(rset, 0, set_size);
+ memset(wset, 0, set_size);
+
+ FD_SET(in, rset);
+ olen = buffer_len(&oqueue);
+ if (olen > 0)
+ FD_SET(out, wset);
+
+ if (select(max+1, rset, wset, NULL, NULL) < 0) {
+ if (errno == EINTR)
+ continue;
+ exit(2);
+ }
+
+ /* copy stdin to iqueue */
+ if (FD_ISSET(in, rset)) {
+ char buf[4*4096];
+ len = read(in, buf, sizeof buf);
+ if (len == 0) {
+ debug("read eof");
+ exit(0);
+ } else if (len < 0) {
+ error("read error");
+ exit(1);
+ } else {
+ buffer_append(&iqueue, buf, len);
+ }
+ }
+ /* send oqueue to stdout */
+ if (FD_ISSET(out, wset)) {
+ len = write(out, buffer_ptr(&oqueue), olen);
+ if (len < 0) {
+ error("write error");
+ exit(1);
+ } else {
+ buffer_consume(&oqueue, len);
+ }
+ }
+ /* process requests from client */
+ process();
+ }
+}
andersk / gssapi-openssh.git / blobdiff