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upstream: Switch scp back to use the old protocol by default, ahead of

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release. We'll wait a little longer for people to pick up sftp-server(8) that
supports the extension that scp needs for ~user paths to continue working in
SFTP protocol mode. Discussed with deraadt@

OpenBSD-Commit-ID: f281f603a705fba317ff076e7b11bcf2df941871
This commit is contained in:
djm@openbsd.org 2021-09-20 01:55:42 +00:00 committed by Damien Miller
parent ace19b34cc
commit 277d3c6adf
2 changed files with 12 additions and 16 deletions
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24
scp.1
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@ -8,9 +8,9 @@
.\" .\"
.\" Created: Sun May 7 00:14:37 1995 ylo .\" Created: Sun May 7 00:14:37 1995 ylo
.\" .\"
.\" $OpenBSD: scp.1,v 1.103 2021/09/10 07:11:11 dtucker Exp $ .\" $OpenBSD: scp.1,v 1.104 2021/09/20 01:55:42 djm Exp $
.\" .\"
.Dd $Mdocdate: September 10 2021 $ .Dd $Mdocdate: September 20 2021 $
.Dt SCP 1 .Dt SCP 1
.Os .Os
.Sh NAME .Sh NAME
@ -76,9 +76,7 @@ The options are as follows:
Copies between two remote hosts are transferred through the local host. Copies between two remote hosts are transferred through the local host.
Without this option the data is copied directly between the two remote Without this option the data is copied directly between the two remote
hosts. hosts.
Note that, when using the legacy SCP protocol (via the Note that, when using the original SCP protocol (the default), this option
.Fl O
flag), this option
selects batch mode for the second host as selects batch mode for the second host as
.Nm .Nm
cannot ask for passwords or passphrases for both hosts. cannot ask for passwords or passphrases for both hosts.
@ -111,7 +109,7 @@ This option is directly passed to
.Xr ssh 1 . .Xr ssh 1 .
.It Fl D Ar sftp_server_path .It Fl D Ar sftp_server_path
When using the SFTP protocol support via When using the SFTP protocol support via
.Fl M , .Fl s ,
connect directly to a local SFTP server program rather than a connect directly to a local SFTP server program rather than a
remote one via remote one via
.Xr ssh 1 . .Xr ssh 1 .
@ -143,12 +141,13 @@ This option is directly passed to
.It Fl l Ar limit .It Fl l Ar limit
Limits the used bandwidth, specified in Kbit/s. Limits the used bandwidth, specified in Kbit/s.
.It Fl O .It Fl O
Use the legacy SCP protocol for file transfers instead of the SFTP protocol. Use the original SCP protocol for file transfers instead of the SFTP protocol.
Forcing the use of the SCP protocol may be necessary for servers that do Forcing the use of the SCP protocol may be necessary for servers that do
not implement SFTP, for backwards-compatibility for particular filename not implement SFTP, for backwards-compatibility for particular filename
wildcard patterns and for expanding paths with a wildcard patterns and for expanding paths with a
.Sq ~ .Sq ~
prefix for older SFTP servers. prefix for older SFTP servers.
This mode is the default.
.It Fl o Ar ssh_option .It Fl o Ar ssh_option
Can be used to pass options to Can be used to pass options to
.Nm ssh .Nm ssh
@ -258,6 +257,8 @@ to use for the encrypted connection.
The program must understand The program must understand
.Xr ssh 1 .Xr ssh 1
options. options.
.It Fl s
use the SFTP protocol for transfers rather than the original scp protocol.
.It Fl T .It Fl T
Disable strict filename checking. Disable strict filename checking.
By default when copying files from a remote host to a local directory By default when copying files from a remote host to a local directory
@ -294,17 +295,12 @@ debugging connection, authentication, and configuration problems.
is based on the rcp program in is based on the rcp program in
.Bx .Bx
source code from the Regents of the University of California. source code from the Regents of the University of California.
.Pp
Since OpenSSH 8.8,
.Nm
has use the SFTP protocol for transfers by default.
.Sh AUTHORS .Sh AUTHORS
.An Timo Rinne Aq Mt tri@iki.fi .An Timo Rinne Aq Mt tri@iki.fi
.An Tatu Ylonen Aq Mt ylo@cs.hut.fi .An Tatu Ylonen Aq Mt ylo@cs.hut.fi
.Sh CAVEATS .Sh CAVEATS
The legacy SCP protocol (selected by the The original SCP protocol (used by default) requires execution of the
.Fl O remote user's shell to perform
flag) requires execution of the remote user's shell to perform
.Xr glob 3 .Xr glob 3
pattern matching. pattern matching.
This requires careful quoting of any characters that have special meaning to This requires careful quoting of any characters that have special meaning to

4
scp.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: scp.c,v 1.237 2021/09/18 02:03:25 djm Exp $ */ /* $OpenBSD: scp.c,v 1.238 2021/09/20 01:55:42 djm Exp $ */
/* /*
* scp - secure remote copy. This is basically patched BSD rcp which * scp - secure remote copy. This is basically patched BSD rcp which
* uses ssh to do the data transfer (instead of using rcmd). * uses ssh to do the data transfer (instead of using rcmd).
@ -448,7 +448,7 @@ main(int argc, char **argv)
const char *errstr; const char *errstr;
extern char *optarg; extern char *optarg;
extern int optind; extern int optind;
enum scp_mode_e mode = MODE_SFTP; enum scp_mode_e mode = MODE_SCP;
char *sftp_direct = NULL; char *sftp_direct = NULL;
/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */