[openssh-commits] [openssh] 04/05: upstream: when scp(1) is using the SFTP protocol for transport (the

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djm pushed a commit to branch master
in repository openssh.

commit a4821a592456c3add3cd325db433110cdaaa3e5c
Author: djm at openbsd.org <djm at openbsd.org>
Date:   Mon Oct 24 21:51:55 2022 +0000

    upstream: when scp(1) is using the SFTP protocol for transport (the
    
    default), better match scp/rcp's handling of globs that don't match the
    globbed characters but do match literally (e.g. trying to transfer
    "foo.[1]").
    
    Previously scp(1) in SFTP mode would not match these pathnames but
    legacy scp/rcp mode would.
    
    Reported by Michael Yagliyan in bz3488; ok dtucker@
    
    OpenBSD-Commit-ID: d8a3773f53015ba811fddba7473769a2fd343e11
---
 scp.c       | 39 +++++++++++++++++++++++++++++++++++----
 sftp-glob.c | 34 ++++++++++++++++++++++++++++++++--
 2 files changed, 67 insertions(+), 6 deletions(-)

diff --git a/scp.c b/scp.c
index f9ca5d39..73bfe2f5 100644
--- a/scp.c
+++ b/scp.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: scp.c,v 1.248 2022/05/13 06:31:50 djm Exp $ */
+/* $OpenBSD: scp.c,v 1.249 2022/10/24 21:51:55 djm Exp $ */
 /*
  * scp - secure remote copy.  This is basically patched BSD rcp which
  * uses ssh to do the data transfer (instead of using rcmd).
@@ -1505,7 +1505,8 @@ sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn)
 	}
 
 	debug3_f("copying remote %s to local %s", abs_src, dst);
-	if ((r = remote_glob(conn, abs_src, GLOB_MARK, NULL, &g)) != 0) {
+	if ((r = remote_glob(conn, abs_src, GLOB_NOCHECK|GLOB_MARK,
+	    NULL, &g)) != 0) {
 		if (r == GLOB_NOSPACE)
 			error("%s: too many glob matches", src);
 		else
@@ -1514,6 +1515,20 @@ sink_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn)
 		goto out;
 	}
 
+	/* Did we actually get any matches back from the glob? */
+	if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) {
+		/*
+		 * If nothing matched but a path returned, then it's probably
+		 * a GLOB_NOCHECK result. Check whether the unglobbed path
+		 * exists so we can give a nice error message early.
+		 */
+		if (do_stat(conn, g.gl_pathv[0], 1) == NULL) {
+			error("%s: %s", src, strerror(ENOENT));
+			err = -1;
+			goto out;
+		}
+	}
+
 	if ((r = stat(dst, &st)) != 0)
 		debug2_f("stat local \"%s\": %s", dst, strerror(errno));
 	dst_is_dir = r == 0 && S_ISDIR(st.st_mode);
@@ -1731,7 +1746,8 @@ sink(int argc, char **argv, const char *src)
 		}
 		if (npatterns > 0) {
 			for (n = 0; n < npatterns; n++) {
-				if (fnmatch(patterns[n], cp, 0) == 0)
+				if (strcmp(patterns[n], cp) == 0 ||
+				    fnmatch(patterns[n], cp, 0) == 0)
 					break;
 			}
 			if (n >= npatterns)
@@ -1922,7 +1938,8 @@ throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to,
 	}
 
 	debug3_f("copying remote %s to remote %s", abs_src, target);
-	if ((r = remote_glob(from, abs_src, GLOB_MARK, NULL, &g)) != 0) {
+	if ((r = remote_glob(from, abs_src, GLOB_NOCHECK|GLOB_MARK,
+	    NULL, &g)) != 0) {
 		if (r == GLOB_NOSPACE)
 			error("%s: too many glob matches", src);
 		else
@@ -1931,6 +1948,20 @@ throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to,
 		goto out;
 	}
 
+	/* Did we actually get any matches back from the glob? */
+	if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) {
+		/*
+		 * If nothing matched but a path returned, then it's probably
+		 * a GLOB_NOCHECK result. Check whether the unglobbed path
+		 * exists so we can give a nice error message early.
+		 */
+		if (do_stat(from, g.gl_pathv[0], 1) == NULL) {
+			error("%s: %s", src, strerror(ENOENT));
+			err = -1;
+			goto out;
+		}
+	}
+
 	for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
 		tmp = xstrdup(g.gl_pathv[i]);
 		if ((filename = basename(tmp)) == NULL) {
diff --git a/sftp-glob.c b/sftp-glob.c
index 764e9955..afeb15f9 100644
--- a/sftp-glob.c
+++ b/sftp-glob.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sftp-glob.c,v 1.30 2022/02/25 09:46:24 dtucker Exp $ */
+/* $OpenBSD: sftp-glob.c,v 1.31 2022/10/24 21:51:55 djm Exp $ */
 /*
  * Copyright (c) 2001-2004 Damien Miller <djm at openbsd.org>
  *
@@ -137,6 +137,11 @@ int
 remote_glob(struct sftp_conn *conn, const char *pattern, int flags,
     int (*errfunc)(const char *, int), glob_t *pglob)
 {
+	int r;
+	size_t l;
+	char *s;
+	struct stat sb;
+
 	pglob->gl_opendir = fudge_opendir;
 	pglob->gl_readdir = (struct dirent *(*)(void *))fudge_readdir;
 	pglob->gl_closedir = (void (*)(void *))fudge_closedir;
@@ -146,5 +151,30 @@ remote_glob(struct sftp_conn *conn, const char *pattern, int flags,
 	memset(&cur, 0, sizeof(cur));
 	cur.conn = conn;
 
-	return(glob(pattern, flags | GLOB_ALTDIRFUNC, errfunc, pglob));
+	if ((r = glob(pattern, flags | GLOB_ALTDIRFUNC, errfunc, pglob)) != 0)
+		return r;
+	/*
+	 * When both GLOB_NOCHECK and GLOB_MARK are active, a single gl_pathv
+	 * entry has been returned and that entry has not already been marked,
+	 * then check whether it needs a '/' appended as a directory mark.
+	 *
+	 * This ensures that a NOCHECK result is annotated as a directory.
+	 * The glob(3) spec doesn't promise to mark NOCHECK entries, but doing
+	 * it simplifies our callers (sftp/scp) considerably.
+	 *
+	 * XXX doesn't try to handle gl_offs.
+	 */
+	if ((flags & (GLOB_NOCHECK|GLOB_MARK)) == (GLOB_NOCHECK|GLOB_MARK) &&
+	    pglob->gl_matchc == 0 && pglob->gl_offs == 0 &&
+	    pglob->gl_pathc == 1 && (s = pglob->gl_pathv[0]) != NULL &&
+	    (l = strlen(s)) > 0 && s[l-1] != '/') {
+		if (fudge_stat(s, &sb) == 0 && S_ISDIR(sb.st_mode)) {
+			/* NOCHECK on a directory; annotate */
+			if ((s = realloc(s, l + 2)) != NULL) {
+				memcpy(s + l, "/", 2);
+				pglob->gl_pathv[0] = s;
+			}
+		}
+	}
+	return 0;
 }

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