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Keep ssh tunnel open with autossh, and give root user ssh keys so unprivileged user cant access the host

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Micah Lee 2021-07-14 11:36:13 -07:00
parent 3f76211459
commit 2c2f87593c
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6 changed files with 100 additions and 101 deletions
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132
dangerzone-converter/Dockerfile
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@ -10,72 +10,72 @@ RUN apk -U upgrade && \
poppler-utils \ poppler-utils \
py3-magic \ py3-magic \
py3-pillow \ py3-pillow \
sudo sudo \
# tesseract-ocr \ tesseract-ocr \
# tesseract-ocr-data-afr \ tesseract-ocr-data-afr \
# tesseract-ocr-data-ara \ tesseract-ocr-data-ara \
# tesseract-ocr-data-aze \ tesseract-ocr-data-aze \
# tesseract-ocr-data-bel \ tesseract-ocr-data-bel \
# tesseract-ocr-data-ben \ tesseract-ocr-data-ben \
# tesseract-ocr-data-bul \ tesseract-ocr-data-bul \
# tesseract-ocr-data-cat \ tesseract-ocr-data-cat \
# tesseract-ocr-data-ces \ tesseract-ocr-data-ces \
# tesseract-ocr-data-chi_sim \ tesseract-ocr-data-chi_sim \
# tesseract-ocr-data-chi_tra \ tesseract-ocr-data-chi_tra \
# tesseract-ocr-data-chr \ tesseract-ocr-data-chr \
# tesseract-ocr-data-dan \ tesseract-ocr-data-dan \
# tesseract-ocr-data-deu \ tesseract-ocr-data-deu \
# tesseract-ocr-data-ell \ tesseract-ocr-data-ell \
# tesseract-ocr-data-enm \ tesseract-ocr-data-enm \
# tesseract-ocr-data-epo \ tesseract-ocr-data-epo \
# tesseract-ocr-data-equ \ tesseract-ocr-data-equ \
# tesseract-ocr-data-est \ tesseract-ocr-data-est \
# tesseract-ocr-data-eus \ tesseract-ocr-data-eus \
# tesseract-ocr-data-fin \ tesseract-ocr-data-fin \
# tesseract-ocr-data-fra \ tesseract-ocr-data-fra \
# tesseract-ocr-data-frk \ tesseract-ocr-data-frk \
# tesseract-ocr-data-frm \ tesseract-ocr-data-frm \
# tesseract-ocr-data-glg \ tesseract-ocr-data-glg \
# tesseract-ocr-data-grc \ tesseract-ocr-data-grc \
# tesseract-ocr-data-heb \ tesseract-ocr-data-heb \
# tesseract-ocr-data-hin \ tesseract-ocr-data-hin \
# tesseract-ocr-data-hrv \ tesseract-ocr-data-hrv \
# tesseract-ocr-data-hun \ tesseract-ocr-data-hun \
# tesseract-ocr-data-ind \ tesseract-ocr-data-ind \
# tesseract-ocr-data-isl \ tesseract-ocr-data-isl \
# tesseract-ocr-data-ita \ tesseract-ocr-data-ita \
# tesseract-ocr-data-ita_old \ tesseract-ocr-data-ita_old \
# tesseract-ocr-data-jpn \ tesseract-ocr-data-jpn \
# tesseract-ocr-data-kan \ tesseract-ocr-data-kan \
# tesseract-ocr-data-kat \ tesseract-ocr-data-kat \
# tesseract-ocr-data-kor \ tesseract-ocr-data-kor \
# tesseract-ocr-data-lav \ tesseract-ocr-data-lav \
# tesseract-ocr-data-lit \ tesseract-ocr-data-lit \
# tesseract-ocr-data-mal \ tesseract-ocr-data-mal \
# tesseract-ocr-data-mkd \ tesseract-ocr-data-mkd \
# tesseract-ocr-data-mlt \ tesseract-ocr-data-mlt \
# tesseract-ocr-data-msa \ tesseract-ocr-data-msa \
# tesseract-ocr-data-nld \ tesseract-ocr-data-nld \
# tesseract-ocr-data-nor \ tesseract-ocr-data-nor \
# tesseract-ocr-data-pol \ tesseract-ocr-data-pol \
# tesseract-ocr-data-por \ tesseract-ocr-data-por \
# tesseract-ocr-data-ron \ tesseract-ocr-data-ron \
# tesseract-ocr-data-rus \ tesseract-ocr-data-rus \
# tesseract-ocr-data-slk \ tesseract-ocr-data-slk \
# tesseract-ocr-data-slv \ tesseract-ocr-data-slv \
# tesseract-ocr-data-spa \ tesseract-ocr-data-spa \
# tesseract-ocr-data-spa_old \ tesseract-ocr-data-spa_old \
# tesseract-ocr-data-sqi \ tesseract-ocr-data-sqi \
# tesseract-ocr-data-srp \ tesseract-ocr-data-srp \
# tesseract-ocr-data-swa \ tesseract-ocr-data-swa \
# tesseract-ocr-data-swe \ tesseract-ocr-data-swe \
# tesseract-ocr-data-tam \ tesseract-ocr-data-tam \
# tesseract-ocr-data-tel \ tesseract-ocr-data-tel \
# tesseract-ocr-data-tgl \ tesseract-ocr-data-tgl \
# tesseract-ocr-data-tha \ tesseract-ocr-data-tha \
# tesseract-ocr-data-tur \ tesseract-ocr-data-tur \
# tesseract-ocr-data-ukr \ tesseract-ocr-data-ukr \
# tesseract-ocr-data-vie tesseract-ocr-data-vie
# Install pdftk # Install pdftk
RUN \ RUN \

7
dangerzone/gui/vm.py
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@ -230,9 +230,10 @@ class Vm(QtCore.QObject):
args_str = " ".join(pipes.quote(s) for s in args) args_str = " ".join(pipes.quote(s) for s in args)
print("> " + args_str) print("> " + args_str)
# To be able to login to the VM from the console, remove the stdout, stderr, and stdin args below # To be able to login to the VM from the console, remove the stdout, stderr, and stdin args below
self.hyperkit_p = subprocess.Popen( # self.hyperkit_p = subprocess.Popen(
args, stdout=self.devnull, stderr=self.devnull, stdin=self.devnull # args, stdout=self.devnull, stderr=self.devnull, stdin=self.devnull
) # )
self.hyperkit_p = subprocess.Popen(args)
# Wait for SSH thread # Wait for SSH thread
self.wait_t = WaitForSsh(self.sshd_tunnel_port) self.wait_t = WaitForSsh(self.sshd_tunnel_port)

2
install/vm-builder/etc/apk/world
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@ -1,6 +1,6 @@
alpine-base alpine-base
podman podman
dropbear dropbear
sshfs autossh
python3 python3
sudo sudo

4
install/vm-builder/etc/init.d/dangerzone
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@ -8,10 +8,6 @@ start() {
# Create user # Create user
/usr/sbin/adduser -D -u 1001 user /usr/sbin/adduser -D -u 1001 user
# Make folder for user mounts
mkdir /home/user/mnt
chown user:user /home/user/mnt
# Move containers into home dir # Move containers into home dir
mkdir -p /home/user/.local/share mkdir -p /home/user/.local/share
mv /etc/container-data /home/user/.local/share/containers mv /etc/container-data /home/user/.local/share/containers

54
install/vm-builder/etc/ssh-to-host.py
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@ -16,53 +16,55 @@ def main():
info = json.loads(s[0 : s.find(b"\0")]) info = json.loads(s[0 : s.find(b"\0")])
# Create SSH files # Create root's SSH files
os.makedirs("/home/user/.ssh", exist_ok=True) os.makedirs("/root/.ssh", exist_ok=True)
with open("/home/user/.ssh/id_ed25519", "w") as f: with open("/root/.ssh/id_ed25519", "w") as f:
f.write(info["id_ed25519"]) f.write(info["id_ed25519"])
f.write("\n") f.write("\n")
with open("/home/user/.ssh/id_ed25519.pub", "w") as f: with open("/root/.ssh/id_ed25519.pub", "w") as f:
f.write(info["id_ed25519.pub"]) f.write(info["id_ed25519.pub"])
f.write("\n") f.write("\n")
with open("/root/.ssh/config", "w") as f:
f.write("Host hostbox\n")
f.write(f" Hostname {info['ip']}\n")
f.write(f" Port {info['port']}\n")
f.write(f" User {info['user']}\n")
f.write(f" RemoteForward {info['tunnel_port']} 127.0.0.1:22\n")
f.write(" IdentityFile /root/.ssh/id_ed25519\n")
f.write(" ServerAliveInterval 30\n")
f.write(" ServerAliveCountMax 3\n")
f.write(" StrictHostKeyChecking no\n")
f.write("\n")
os.chmod("/root/.ssh", 0o700)
os.chmod("/root/.ssh/id_ed25519", 0o600)
os.chmod("/root/.ssh/id_ed25519.pub", 0o600)
os.chmod("/root/.ssh/config", 0o600)
# Create user's SSH files
os.makedirs("/home/user/.ssh", exist_ok=True)
with open("/home/user/.ssh/authorized_keys", "w") as f: with open("/home/user/.ssh/authorized_keys", "w") as f:
f.write(info["id_ed25519.pub"]) f.write(info["id_ed25519.pub"])
f.write("\n") f.write("\n")
with open("/home/user/.ssh/config", "w") as f:
f.write("Host hostbox\n")
f.write(f" Hostname {info['ip']}\n")
f.write(f" Port {info['port']}\n")
f.write(f" User {info['user']}\n")
f.write(" IdentityFile /home/user/.ssh/id_ed25519\n")
f.write("\n")
os.chmod("/home/user/.ssh", 0o700) os.chmod("/home/user/.ssh", 0o700)
os.chmod("/home/user/.ssh/id_ed25519", 0o600)
os.chmod("/home/user/.ssh/id_ed25519.pub", 0o644)
os.chmod("/home/user/.ssh/authorized_keys", 0o600) os.chmod("/home/user/.ssh/authorized_keys", 0o600)
os.chmod("/home/user/.ssh/config", 0o600)
shutil.chown("/home/user/.ssh", "user", "user") shutil.chown("/home/user/.ssh", "user", "user")
shutil.chown("/home/user/.ssh/id_ed25519", "user", "user")
shutil.chown("/home/user/.ssh/id_ed25519.pub", "user", "user")
shutil.chown("/home/user/.ssh/authorized_keys", "user", "user") shutil.chown("/home/user/.ssh/authorized_keys", "user", "user")
shutil.chown("/home/user/.ssh/config", "user", "user")
# Start SSH reverse port forward # Start SSH reverse port forward
subprocess.run( subprocess.run(
[ [
"/usr/bin/sudo", "/usr/bin/autossh",
"-u", "-M",
"user", "0",
"/usr/bin/ssh", "-f",
"-o",
"StrictHostKeyChecking=no",
"-N", "-N",
"-R",
f"{info['tunnel_port']}:127.0.0.1:22",
"hostbox", "hostbox",
] ]
) )

2
install/vm-builder/mkimg.dangerzone.sh
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@ -9,5 +9,5 @@ profile_dangerzone() {
kernel_cmdline="console=tty0 console=ttyS0,115200" kernel_cmdline="console=tty0 console=ttyS0,115200"
syslinux_serial="0 115200" syslinux_serial="0 115200"
apkovl="genapkovl-dangerzone.sh" apkovl="genapkovl-dangerzone.sh"
apks="$apks podman dropbear sshfs python3 sudo" apks="$apks podman dropbear autossh python3 sudo"
} }