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#!/bin/sh | |
# | |
# msys2-sshd-setup.sh — configure sshd on MSYS2 and run it as a Windows service | |
# | |
# Please report issues and/or improvements to Sam Hocevar <sam@hocevar.net> | |
# | |
# Prerequisites: | |
# — MSYS2 itself: http://sourceforge.net/projects/msys2/ | |
# — admin tools: pacman -S openssh cygrunsrv mingw-w64-x86_64-editrights | |
# | |
# This script is a cleaned up and improved version of the procedure initially | |
# found at https://ghc.haskell.org/trac/ghc/wiki/Building/Windows/SSHD | |
# | |
# Gotchas: | |
# — the log file will be /var/log/msys2_sshd.log | |
# — if you get error “sshd: fatal: seteuid XXX : No such device or address” | |
# in the logs, try “passwd -R” (with admin privileges) | |
# | |
# Changelog: | |
# 27 Jun 2019 — rename service to msys2_sshd to avoid conflicts with Windows OpenSSH | |
# — use mkgroup.exe as suggested in the comments | |
# — fix a problem with CRLF and grep | |
# 24 Aug 2015 — run server with -e to redirect logs to /var/log/sshd.log | |
# | |
set -e | |
# | |
# Configuration | |
# | |
PRIV_USER=sshd_server | |
PRIV_NAME="Privileged user for sshd" | |
UNPRIV_USER=sshd # DO NOT CHANGE; this username is hardcoded in the openssh code | |
UNPRIV_NAME="Privilege separation user for sshd" | |
EMPTY_DIR=/var/empty | |
# | |
# Check installation sanity | |
# | |
if ! /mingw64/bin/editrights -h >/dev/null; then | |
echo "ERROR: Missing 'editrights'. Try: pacman -S mingw-w64-x86_64-editrights." | |
exit 1 | |
fi | |
if ! cygrunsrv -v >/dev/null; then | |
echo "ERROR: Missing 'cygrunsrv'. Try: pacman -S cygrunsrv." | |
exit 1 | |
fi | |
if ! ssh-keygen -A; then | |
echo "ERROR: Missing 'ssh-keygen'. Try: pacman -S openssh." | |
exit 1 | |
fi | |
# | |
# The privileged cyg_server user | |
# | |
# Some random password; this is only needed internally by cygrunsrv and | |
# is limited to 14 characters by Windows (lol) | |
tmp_pass="$(tr -dc 'a-zA-Z0-9' < /dev/urandom | dd count=14 bs=1 2>/dev/null)" | |
# Create user | |
add="$(if ! net user "${PRIV_USER}" >/dev/null; then echo "//add"; fi)" | |
if ! net user "${PRIV_USER}" "${tmp_pass}" ${add} //fullname:"${PRIV_NAME}" \ | |
//homedir:"$(cygpath -w ${EMPTY_DIR})" //yes; then | |
echo "ERROR: Unable to create Windows user ${PRIV_USER}" | |
exit 1 | |
fi | |
# Add user to the Administrators group if necessary | |
admingroup="$(mkgroup -l | awk -F: '{if ($2 == "S-1-5-32-544") print $1;}')" | |
if ! (net localgroup "${admingroup}" | grep -q '^'"${PRIV_USER}"'\>'); then | |
if ! net localgroup "${admingroup}" "${PRIV_USER}" //add; then | |
echo "ERROR: Unable to add user ${PRIV_USER} to group ${admingroup}" | |
exit 1 | |
fi | |
fi | |
# Infinite passwd expiry | |
passwd -e "${PRIV_USER}" | |
# set required privileges | |
for flag in SeAssignPrimaryTokenPrivilege SeCreateTokenPrivilege \ | |
SeTcbPrivilege SeDenyRemoteInteractiveLogonRight SeServiceLogonRight; do | |
if ! /mingw64/bin/editrights -a "${flag}" -u "${PRIV_USER}"; then | |
echo "ERROR: Unable to give ${flag} rights to user ${PRIV_USER}" | |
exit 1 | |
fi | |
done | |
# | |
# The unprivileged sshd user (for privilege separation) | |
# | |
add="$(if ! net user "${UNPRIV_USER}" >/dev/null; then echo "//add"; fi)" | |
if ! net user "${UNPRIV_USER}" ${add} //fullname:"${UNPRIV_NAME}" \ | |
//homedir:"$(cygpath -w ${EMPTY_DIR})" //active:no; then | |
echo "ERROR: Unable to create Windows user ${PRIV_USER}" | |
exit 1 | |
fi | |
# | |
# Add or update /etc/passwd entries | |
# | |
touch /etc/passwd | |
for u in "${PRIV_USER}" "${UNPRIV_USER}"; do | |
sed -i -e '/^'"${u}"':/d' /etc/passwd | |
SED='/^'"${u}"':/s?^\(\([^:]*:\)\{5\}\).*?\1'"${EMPTY_DIR}"':/bin/false?p' | |
mkpasswd -l -u "${u}" | sed -e 's/^[^:]*+//' | sed -ne "${SED}" \ | |
>> /etc/passwd | |
done | |
mkgroup.exe -l > /etc/group | |
# | |
# Finally, register service with cygrunsrv and start it | |
# | |
cygrunsrv -R msys2_sshd || true | |
cygrunsrv -I msys2_sshd -d "MSYS2 sshd" -p \ | |
/usr/bin/sshd.exe -a "-D -e" -y tcpip -u "${PRIV_USER}" -w "${tmp_pass}" | |
# The SSH service should start automatically when Windows is rebooted. You can | |
# manually restart the service by running `net stop msys2_sshd` + `net start msys2_sshd` | |
if ! net start msys2_sshd; then | |
echo "ERROR: Unable to start msys2_sshd service" | |
exit 1 | |
fi |
Thanks, @kolewu. I don't know how I missed this. Should be fixed in a few minutes.
Shouldn't this be renamed from gistfile1.sh
to msys2-sshd-setup.sh
?
@elieux Thanks for the quick correction. There is an important information that should be added somewhere (but I don't know where): This configuration of sshd only works for local user. It's not possible to login as domain user (this produces the seteuid
fatal error) and I haven't found the missing bits and pieces (passwd -R
isn't enough).
For me the more practical solution was in this link
the section Setting up SSH , without user with privileg...for my desktop....
the script do not run for me ...many issues, thanks
https://www.booleanworld.com/get-unix-linux-environment-windows-msys2/
thanks! this worked for me.
There is an important information that should be added somewhere (but I don't know where): This configuration of sshd only works for local user. It's not possible to login as domain user (this produces the seteuid fatal error) and I haven't found the missing bits and pieces (passwd -R isn't enough).
@kolewu Thanks for a very helpful note. Apparently this is solved in https://github.com/rkitover/windows-alt-sshd-msys2
I've tried several different versions of this script including this one, https://www.msys2.org/wiki/Setting-up-SSHd/, and https://github.com/rkitover/windows-alt-sshd-msys2/blob/master/msys2-alt-sshd-setup.sh. All have issues.
When I run this script I get the below error:
"The user name could not be found.
More help is available by typing NET HELPMSG 2221.
The option //ADD is unknown.
The syntax of this command is:
NET USER
[username [password | *] [options]] [/DOMAIN]
username {password | *} /ADD [options] [/DOMAIN]
username [/DELETE] [/DOMAIN]
username [/TIMES:{times | ALL}]
username [/ACTIVE: {YES | NO}]
More help is available by typing NET HELPMSG 3506.
ERROR: Unable to create Windows user "
How do I get around this? I tried jouven's instructions. I ran /usr/bin/mkpasswd | grep using my personal account and copied that line into /etc/passwd. I already have a password on my account, but still tried passwd and it said "You may not change the password for ?. I thought that was fine so I continued on and ran the script and got the error above. Any ideas? Thanks
@wapiti96 The script uses //ADD
to tell the msys2 path handling converter to not treat it as a path and convert it to /ADD
.
Make sure you are not setting the environment variable MSYS2_ARG_CONV_EXCL
or other variables related to path conversion.
if you want to execute a windows app say notepad you are running windows service you have to use a weird hack like this
MSYS2_ARG_CONV_EXCL="*" schtasks /create /sc once /tn "NotepadIn10Sec" /tr "notepad.exe" /st $(date -d @"$((current_time=$(date +%s) +40 ))" +"%H:%M:%S") && ( sleep 50; MSYS2_ARG_CONV_EXCL="*" schtasks /delete /tn "NotepadIn10Sec" /f)
assuming you're logged in as the same user
and in case you're on a firewall:
cygrunsrv -R msys2_autossh ; cygrunsrv -I msys2_autossh -d "MSYS2 autossh" -p "/usr/bin/bash.exe" -a "autossh -M 0 -i /home/myuser/.ssh/id_rsa -o UserKnownHostsFile=/home/myuser/.ssh/known_hosts -R 9090:localhost:22 remoteuser@192.168.59.30 -N" -y msys2_sshd
Anyone have a solution to "passwd: unrecoverable error 8646" in Win10 Pro 1809 64-bit?
MSYS ~ # passwd rcpao New password: Re-enter new password: passwd: unrecoverable error 8646 Try again. New password: Re-enter new password: passwd: unrecoverable error 8646 Try again. New password: Re-enter new password: passwd: unrecoverable error 8646 MSYS ~ #
metoo
@improve100 just use a key instead
@elieux the script in msys-wiki is missing the generation of
tmp_pass
. What's more, it still contains the unnecessaryPRIV_USER
.