a rough subset of openssh-6.7p1 ("portable" branch), as needed to build

sftp-server

openssh/buffer.h

@@ -0,0 +1,98 @@
+/* $OpenBSD: buffer.h,v 1.25 2014/04/30 05:29:56 djm Exp $ */
+
+/*
+ * Copyright (c) 2012 Damien Miller <djm@mindrot.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* Emulation wrappers for legacy OpenSSH buffer API atop sshbuf */
+
+#ifndef BUFFER_H
+#define BUFFER_H
+
+#include "sshbuf.h"
+
+typedef struct sshbuf Buffer;
+
+#define buffer_init(b)		sshbuf_init(b)
+#define buffer_clear(b)		sshbuf_reset(b)
+#define buffer_free(b)		sshbuf_free(b)
+#define buffer_dump(b)		sshbuf_dump(b, stderr)
+
+/* XXX cast is safe: sshbuf never stores more than len 2^31 */
+#define buffer_len(b)		((u_int) sshbuf_len(b))
+#define	buffer_ptr(b)		sshbuf_mutable_ptr(b)
+
+void	 buffer_append(Buffer *, const void *, u_int);
+void	*buffer_append_space(Buffer *, u_int);
+int	 buffer_check_alloc(Buffer *, u_int);
+void	 buffer_get(Buffer *, void *, u_int);
+
+void	 buffer_consume(Buffer *, u_int);
+void	 buffer_consume_end(Buffer *, u_int);
+
+
+int	 buffer_get_ret(Buffer *, void *, u_int);
+int	 buffer_consume_ret(Buffer *, u_int);
+int	 buffer_consume_end_ret(Buffer *, u_int);
+
+#include <openssl/bn.h>
+void    buffer_put_bignum(Buffer *, const BIGNUM *);
+void    buffer_put_bignum2(Buffer *, const BIGNUM *);
+void	buffer_get_bignum(Buffer *, BIGNUM *);
+void	buffer_get_bignum2(Buffer *, BIGNUM *);
+void	buffer_put_bignum2_from_string(Buffer *, const u_char *, u_int);
+
+u_short	buffer_get_short(Buffer *);
+void	buffer_put_short(Buffer *, u_short);
+
+u_int	buffer_get_int(Buffer *);
+void    buffer_put_int(Buffer *, u_int);
+
+u_int64_t buffer_get_int64(Buffer *);
+void	buffer_put_int64(Buffer *, u_int64_t);
+
+int     buffer_get_char(Buffer *);
+void    buffer_put_char(Buffer *, int);
+
+void   *buffer_get_string(Buffer *, u_int *);
+const void *buffer_get_string_ptr(Buffer *, u_int *);
+void    buffer_put_string(Buffer *, const void *, u_int);
+char   *buffer_get_cstring(Buffer *, u_int *);
+void	buffer_put_cstring(Buffer *, const char *);
+
+#define buffer_skip_string(b) (void)buffer_get_string_ptr(b, NULL);
+
+int	buffer_put_bignum_ret(Buffer *, const BIGNUM *);
+int	buffer_get_bignum_ret(Buffer *, BIGNUM *);
+int	buffer_put_bignum2_ret(Buffer *, const BIGNUM *);
+int	buffer_get_bignum2_ret(Buffer *, BIGNUM *);
+int	buffer_get_short_ret(u_short *, Buffer *);
+int	buffer_get_int_ret(u_int *, Buffer *);
+int	buffer_get_int64_ret(u_int64_t *, Buffer *);
+void	*buffer_get_string_ret(Buffer *, u_int *);
+char	*buffer_get_cstring_ret(Buffer *, u_int *);
+const void *buffer_get_string_ptr_ret(Buffer *, u_int *);
+int	buffer_get_char_ret(char *, Buffer *);
+
+#ifdef OPENSSL_HAS_ECC
+#include <openssl/ec.h>
+int	buffer_put_ecpoint_ret(Buffer *, const EC_GROUP *, const EC_POINT *);
+void	buffer_put_ecpoint(Buffer *, const EC_GROUP *, const EC_POINT *);
+int	buffer_get_ecpoint_ret(Buffer *, const EC_GROUP *, EC_POINT *);
+void	buffer_get_ecpoint(Buffer *, const EC_GROUP *, EC_POINT *);
+#endif
+
+#endif	/* BUFFER_H */
+

openssh/openbsd-compat/fmt_scaled.c

@@ -0,0 +1,274 @@
+/*	$OpenBSD: fmt_scaled.c,v 1.9 2007/03/20 03:42:52 tedu Exp $	*/
+
+/*
+ * Copyright (c) 2001, 2002, 2003 Ian F. Darwin.  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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * 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.
+ */
+
+/* OPENBSD ORIGINAL: lib/libutil/fmt_scaled.c */
+
+/*
+ * fmt_scaled: Format numbers scaled for human comprehension
+ * scan_scaled: Scan numbers in this format.
+ *
+ * "Human-readable" output uses 4 digits max, and puts a unit suffix at
+ * the end.  Makes output compact and easy-to-read esp. on huge disks.
+ * Formatting code was originally in OpenBSD "df", converted to library routine.
+ * Scanning code written for OpenBSD libutil.
+ */
+
+#include "includes.h"
+
+#ifndef HAVE_FMT_SCALED
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <ctype.h>
+#include <limits.h>
+
+typedef enum {
+	NONE = 0, KILO = 1, MEGA = 2, GIGA = 3, TERA = 4, PETA = 5, EXA = 6
+} unit_type;
+
+/* These three arrays MUST be in sync!  XXX make a struct */
+static unit_type units[] = { NONE, KILO, MEGA, GIGA, TERA, PETA, EXA };
+static char scale_chars[] = "BKMGTPE";
+static long long scale_factors[] = {
+	1LL,
+	1024LL,
+	1024LL*1024,
+	1024LL*1024*1024,
+	1024LL*1024*1024*1024,
+	1024LL*1024*1024*1024*1024,
+	1024LL*1024*1024*1024*1024*1024,
+};
+#define	SCALE_LENGTH (sizeof(units)/sizeof(units[0]))
+
+#define MAX_DIGITS (SCALE_LENGTH * 3)	/* XXX strlen(sprintf("%lld", -1)? */
+
+/** Convert the given input string "scaled" into numeric in "result".
+ * Return 0 on success, -1 and errno set on error.
+ */
+int
+scan_scaled(char *scaled, long long *result)
+{
+	char *p = scaled;
+	int sign = 0;
+	unsigned int i, ndigits = 0, fract_digits = 0;
+	long long scale_fact = 1, whole = 0, fpart = 0;
+
+	/* Skip leading whitespace */
+	while (isascii(*p) && isspace(*p))
+		++p;
+
+	/* Then at most one leading + or - */
+	while (*p == '-' || *p == '+') {
+		if (*p == '-') {
+			if (sign) {
+				errno = EINVAL;
+				return -1;
+			}
+			sign = -1;
+			++p;
+		} else if (*p == '+') {
+			if (sign) {
+				errno = EINVAL;
+				return -1;
+			}
+			sign = +1;
+			++p;
+		}
+	}
+
+	/* Main loop: Scan digits, find decimal point, if present.
+	 * We don't allow exponentials, so no scientific notation
+	 * (but note that E for Exa might look like e to some!).
+	 * Advance 'p' to end, to get scale factor.
+	 */
+	for (; isascii(*p) && (isdigit(*p) || *p=='.'); ++p) {
+		if (*p == '.') {
+			if (fract_digits > 0) {	/* oops, more than one '.' */
+				errno = EINVAL;
+				return -1;
+			}
+			fract_digits = 1;
+			continue;
+		}
+
+		i = (*p) - '0';			/* whew! finally a digit we can use */
+		if (fract_digits > 0) {
+			if (fract_digits >= MAX_DIGITS-1)
+				/* ignore extra fractional digits */
+				continue;
+			fract_digits++;		/* for later scaling */
+			fpart *= 10;
+			fpart += i;
+		} else {				/* normal digit */
+			if (++ndigits >= MAX_DIGITS) {
+				errno = ERANGE;
+				return -1;
+			}
+			whole *= 10;
+			whole += i;
+		}
+	}
+
+	if (sign) {
+		whole *= sign;
+		fpart *= sign;
+	}
+
+	/* If no scale factor given, we're done. fraction is discarded. */
+	if (!*p) {
+		*result = whole;
+		return 0;
+	}
+
+	/* Validate scale factor, and scale whole and fraction by it. */
+	for (i = 0; i < SCALE_LENGTH; i++) {
+
+		/** Are we there yet? */
+		if (*p == scale_chars[i] ||
+			*p == tolower(scale_chars[i])) {
+
+			/* If it ends with alphanumerics after the scale char, bad. */
+			if (isalnum(*(p+1))) {
+				errno = EINVAL;
+				return -1;
+			}
+			scale_fact = scale_factors[i];
+
+			/* scale whole part */
+			whole *= scale_fact;
+
+			/* truncate fpart so it does't overflow.
+			 * then scale fractional part.
+			 */
+			while (fpart >= LLONG_MAX / scale_fact) {
+				fpart /= 10;
+				fract_digits--;
+			}
+			fpart *= scale_fact;
+			if (fract_digits > 0) {
+				for (i = 0; i < fract_digits -1; i++)
+					fpart /= 10;
+			}
+			whole += fpart;
+			*result = whole;
+			return 0;
+		}
+	}
+	errno = ERANGE;
+	return -1;
+}
+
+/* Format the given "number" into human-readable form in "result".
+ * Result must point to an allocated buffer of length FMT_SCALED_STRSIZE.
+ * Return 0 on success, -1 and errno set if error.
+ */
+int
+fmt_scaled(long long number, char *result)
+{
+	long long abval, fract = 0;
+	unsigned int i;
+	unit_type unit = NONE;
+
+	abval = (number < 0LL) ? -number : number;	/* no long long_abs yet */
+
+	/* Not every negative long long has a positive representation.
+	 * Also check for numbers that are just too darned big to format
+	 */
+	if (abval < 0 || abval / 1024 >= scale_factors[SCALE_LENGTH-1]) {
+		errno = ERANGE;
+		return -1;
+	}
+
+	/* scale whole part; get unscaled fraction */
+	for (i = 0; i < SCALE_LENGTH; i++) {
+		if (abval/1024 < scale_factors[i]) {
+			unit = units[i];
+			fract = (i == 0) ? 0 : abval % scale_factors[i];
+			number /= scale_factors[i];
+			if (i > 0)
+				fract /= scale_factors[i - 1];
+			break;
+		}
+	}
+
+	fract = (10 * fract + 512) / 1024;
+	/* if the result would be >= 10, round main number */
+	if (fract == 10) {
+		if (number >= 0)
+			number++;
+		else
+			number--;
+		fract = 0;
+	}
+
+	if (number == 0)
+		strlcpy(result, "0B", FMT_SCALED_STRSIZE);
+	else if (unit == NONE || number >= 100 || number <= -100) {
+		if (fract >= 5) {
+			if (number >= 0)
+				number++;
+			else
+				number--;
+		}
+		(void)snprintf(result, FMT_SCALED_STRSIZE, "%lld%c",
+			number, scale_chars[unit]);
+	} else
+		(void)snprintf(result, FMT_SCALED_STRSIZE, "%lld.%1lld%c",
+			number, fract, scale_chars[unit]);
+
+	return 0;
+}
+
+#ifdef	MAIN
+/*
+ * This is the original version of the program in the man page.
+ * Copy-and-paste whatever you need from it.
+ */
+int
+main(int argc, char **argv)
+{
+	char *cinput = "1.5K", buf[FMT_SCALED_STRSIZE];
+	long long ninput = 10483892, result;
+
+	if (scan_scaled(cinput, &result) == 0)
+		printf("\"%s\" -> %lld\n", cinput, result);
+	else
+		perror(cinput);
+
+	if (fmt_scaled(ninput, buf) == 0)
+		printf("%lld -> \"%s\"\n", ninput, buf);
+	else
+		fprintf(stderr, "%lld invalid (%s)\n", ninput, strerror(errno));
+
+	return 0;
+}
+#endif
+
+#endif /* HAVE_FMT_SCALED */

openssh/sftp-common.c

@@ -0,0 +1,236 @@
+/* $OpenBSD: sftp-common.c,v 1.26 2014/01/09 03:26:00 guenther Exp $ */
+/*
+ * Copyright (c) 2001 Markus Friedl.  All rights reserved.
+ * Copyright (c) 2001 Damien Miller.  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/stat.h>
+#include <sys/param.h>
+
+#include <grp.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <stdarg.h>
+#ifdef HAVE_UTIL_H
+#include <util.h>
+#endif
+
+#include "xmalloc.h"
+#include "buffer.h"
+#include "log.h"
+
+#include "sftp.h"
+#include "sftp-common.h"
+
+/* Clear contents of attributes structure */
+void
+attrib_clear(Attrib *a)
+{
+	a->flags = 0;
+	a->size = 0;
+	a->uid = 0;
+	a->gid = 0;
+	a->perm = 0;
+	a->atime = 0;
+	a->mtime = 0;
+}
+
+/* Convert from struct stat to filexfer attribs */
+void
+stat_to_attrib(const struct stat *st, Attrib *a)
+{
+	attrib_clear(a);
+	a->flags = 0;
+	a->flags |= SSH2_FILEXFER_ATTR_SIZE;
+	a->size = st->st_size;
+	a->flags |= SSH2_FILEXFER_ATTR_UIDGID;
+	a->uid = st->st_uid;
+	a->gid = st->st_gid;
+	a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
+	a->perm = st->st_mode;
+	a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;
+	a->atime = st->st_atime;
+	a->mtime = st->st_mtime;
+}
+
+/* Convert from filexfer attribs to struct stat */
+void
+attrib_to_stat(const Attrib *a, struct stat *st)
+{
+	memset(st, 0, sizeof(*st));
+
+	if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
+		st->st_size = a->size;
+	if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
+		st->st_uid = a->uid;
+		st->st_gid = a->gid;
+	}
+	if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
+		st->st_mode = a->perm;
+	if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
+		st->st_atime = a->atime;
+		st->st_mtime = a->mtime;
+	}
+}
+
+/* Decode attributes in buffer */
+Attrib *
+decode_attrib(Buffer *b)
+{
+	static Attrib a;
+
+	attrib_clear(&a);
+	a.flags = buffer_get_int(b);
+	if (a.flags & SSH2_FILEXFER_ATTR_SIZE)
+		a.size = buffer_get_int64(b);
+	if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
+		a.uid = buffer_get_int(b);
+		a.gid = buffer_get_int(b);
+	}
+	if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
+		a.perm = buffer_get_int(b);
+	if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
+		a.atime = buffer_get_int(b);
+		a.mtime = buffer_get_int(b);
+	}
+	/* vendor-specific extensions */
+	if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) {
+		char *type, *data;
+		int i, count;
+
+		count = buffer_get_int(b);
+		for (i = 0; i < count; i++) {
+			type = buffer_get_string(b, NULL);
+			data = buffer_get_string(b, NULL);
+			debug3("Got file attribute \"%s\"", type);
+			free(type);
+			free(data);
+		}
+	}
+	return &a;
+}
+
+/* Encode attributes to buffer */
+void
+encode_attrib(Buffer *b, const Attrib *a)
+{
+	buffer_put_int(b, a->flags);
+	if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
+		buffer_put_int64(b, a->size);
+	if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
+		buffer_put_int(b, a->uid);
+		buffer_put_int(b, a->gid);
+	}
+	if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
+		buffer_put_int(b, a->perm);
+	if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
+		buffer_put_int(b, a->atime);
+		buffer_put_int(b, a->mtime);
+	}
+}
+
+/* Convert from SSH2_FX_ status to text error message */
+const char *
+fx2txt(int status)
+{
+	switch (status) {
+	case SSH2_FX_OK:
+		return("No error");
+	case SSH2_FX_EOF:
+		return("End of file");
+	case SSH2_FX_NO_SUCH_FILE:
+		return("No such file or directory");
+	case SSH2_FX_PERMISSION_DENIED:
+		return("Permission denied");
+	case SSH2_FX_FAILURE:
+		return("Failure");
+	case SSH2_FX_BAD_MESSAGE:
+		return("Bad message");
+	case SSH2_FX_NO_CONNECTION:
+		return("No connection");
+	case SSH2_FX_CONNECTION_LOST:
+		return("Connection lost");
+	case SSH2_FX_OP_UNSUPPORTED:
+		return("Operation unsupported");
+	default:
+		return("Unknown status");
+	}
+	/* NOTREACHED */
+}
+
+/*
+ * drwxr-xr-x    5 markus   markus       1024 Jan 13 18:39 .ssh
+ */
+char *
+ls_file(const char *name, const struct stat *st, int remote, int si_units)
+{
+	int ulen, glen, sz = 0;
+	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];
+	char sbuf[FMT_SCALED_STRSIZE];
+	time_t now;
+
+	strmode(st->st_mode, mode);
+	if (!remote) {
+		user = user_from_uid(st->st_uid, 0);
+	} else {
+		snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
+		user = ubuf;
+	}
+	if (!remote) {
+		group = group_from_gid(st->st_gid, 0);
+	} else {
+		snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
+		group = gbuf;
+	}
+	if (ltime != NULL) {
+		now = time(NULL);
+		if (now - (365*24*60*60)/2 < st->st_mtime &&
+		    now >= st->st_mtime)
+			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);
+	if (si_units) {
+		fmt_scaled((long long)st->st_size, sbuf);
+		snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8s %s %s", mode,
+		    (u_int)st->st_nlink, ulen, user, glen, group,
+		    sbuf, tbuf, name);
+	} else {
+		snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode,
+		    (u_int)st->st_nlink, ulen, user, glen, group,
+		    (unsigned long long)st->st_size, tbuf, name);
+	}
+	return xstrdup(buf);
+}

openssh/sftp-common.h

@@ -0,0 +1,51 @@
+/* $OpenBSD: sftp-common.h,v 1.11 2010/01/13 01:40:16 djm Exp $ */
+
+/*
+ * Copyright (c) 2001 Markus Friedl.  All rights reserved.
+ * Copyright (c) 2001 Damien Miller.  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.
+ */
+
+/* Maximum packet that we are willing to send/accept */
+#define SFTP_MAX_MSG_LENGTH	(256 * 1024)
+
+typedef struct Attrib Attrib;
+
+/* File attributes */
+struct Attrib {
+	u_int32_t	flags;
+	u_int64_t	size;
+	u_int32_t	uid;
+	u_int32_t	gid;
+	u_int32_t	perm;
+	u_int32_t	atime;
+	u_int32_t	mtime;
+};
+
+void	 attrib_clear(Attrib *);
+void	 stat_to_attrib(const struct stat *, Attrib *);
+void	 attrib_to_stat(const Attrib *, struct stat *);
+Attrib	*decode_attrib(Buffer *);
+void	 encode_attrib(Buffer *, const Attrib *);
+char	*ls_file(const char *, const struct stat *, int, int);
+
+const char *fx2txt(int);

openssh/sftp-server-main.c

@@ -0,0 +1,51 @@
+/* $OpenBSD: sftp-server-main.c,v 1.4 2009/02/21 19:32:04 tobias Exp $ */
+/*
+ * Copyright (c) 2008 Markus Friedl.  All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#include <pwd.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "log.h"
+#include "sftp.h"
+#include "misc.h"
+
+void
+cleanup_exit(int i)
+{
+	sftp_server_cleanup_exit(i);
+}
+
+int
+main(int argc, char **argv)
+{
+	struct passwd *user_pw;
+
+	/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
+	sanitise_stdfd();
+
+	if ((user_pw = getpwuid(getuid())) == NULL) {
+		fprintf(stderr, "No user found for uid %lu\n",
+		    (u_long)getuid());
+		return 1;
+	}
+
+	return (sftp_server_main(argc, argv, user_pw));
+}

openssh/sftp.h

@@ -0,0 +1,101 @@
+/* $OpenBSD: sftp.h,v 1.9 2008/06/13 00:12:02 dtucker Exp $ */
+
+/*
+ * Copyright (c) 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.
+ */
+
+/*
+ * draft-ietf-secsh-filexfer-01.txt
+ */
+
+/* version */
+#define	SSH2_FILEXFER_VERSION		3
+
+/* client to server */
+#define SSH2_FXP_INIT			1
+#define SSH2_FXP_OPEN			3
+#define SSH2_FXP_CLOSE			4
+#define SSH2_FXP_READ			5
+#define SSH2_FXP_WRITE			6
+#define SSH2_FXP_LSTAT			7
+#define SSH2_FXP_STAT_VERSION_0		7
+#define SSH2_FXP_FSTAT			8
+#define SSH2_FXP_SETSTAT		9
+#define SSH2_FXP_FSETSTAT		10
+#define SSH2_FXP_OPENDIR		11
+#define SSH2_FXP_READDIR		12
+#define SSH2_FXP_REMOVE			13
+#define SSH2_FXP_MKDIR			14
+#define SSH2_FXP_RMDIR			15
+#define SSH2_FXP_REALPATH		16
+#define SSH2_FXP_STAT			17
+#define SSH2_FXP_RENAME			18
+#define SSH2_FXP_READLINK		19
+#define SSH2_FXP_SYMLINK		20
+
+/* server to client */
+#define SSH2_FXP_VERSION		2
+#define SSH2_FXP_STATUS			101
+#define SSH2_FXP_HANDLE			102
+#define SSH2_FXP_DATA			103
+#define SSH2_FXP_NAME			104
+#define SSH2_FXP_ATTRS			105
+
+#define SSH2_FXP_EXTENDED		200
+#define SSH2_FXP_EXTENDED_REPLY		201
+
+/* attributes */
+#define SSH2_FILEXFER_ATTR_SIZE		0x00000001
+#define SSH2_FILEXFER_ATTR_UIDGID	0x00000002
+#define SSH2_FILEXFER_ATTR_PERMISSIONS	0x00000004
+#define SSH2_FILEXFER_ATTR_ACMODTIME	0x00000008
+#define SSH2_FILEXFER_ATTR_EXTENDED	0x80000000
+
+/* portable open modes */
+#define SSH2_FXF_READ			0x00000001
+#define SSH2_FXF_WRITE			0x00000002
+#define SSH2_FXF_APPEND			0x00000004
+#define SSH2_FXF_CREAT			0x00000008
+#define SSH2_FXF_TRUNC			0x00000010
+#define SSH2_FXF_EXCL			0x00000020
+
+/* statvfs@openssh.com f_flag flags */
+#define SSH2_FXE_STATVFS_ST_RDONLY	0x00000001
+#define SSH2_FXE_STATVFS_ST_NOSUID	0x00000002
+
+/* status messages */
+#define SSH2_FX_OK			0
+#define SSH2_FX_EOF			1
+#define SSH2_FX_NO_SUCH_FILE		2
+#define SSH2_FX_PERMISSION_DENIED	3
+#define SSH2_FX_FAILURE			4
+#define SSH2_FX_BAD_MESSAGE		5
+#define SSH2_FX_NO_CONNECTION		6
+#define SSH2_FX_CONNECTION_LOST		7
+#define SSH2_FX_OP_UNSUPPORTED		8
+#define SSH2_FX_MAX			8
+
+struct passwd;
+
+int	sftp_server_main(int, char **, struct passwd *);
+void	sftp_server_cleanup_exit(int) __attribute__((noreturn));