kvmd-htpasswd

Makefile

@@ -12,7 +12,7 @@ TESTENV_CMD ?= /bin/bash -c " \
 		&& ln -s $(TESTENV_VIDEO) /dev/kvmd-video \
 		&& (losetup -d /dev/kvmd-msd || true) \
 		&& losetup /dev/kvmd-msd /root/loop.img \
-		&& python -m kvmd.apps.kvmd -c /etc/kvmd/kvmd.yaml \
+		&& python -m kvmd.apps.kvmd \
 	"
 
 

configs/kvmd/htpasswd

@@ -1 +1 @@
-admin:$apr1$INC0KeyU$YdLQ9qosXzNVlhxQPUf7A/
+admin:$apr1$.6mu9N8n$xOuGesr4JZZkdiZo/j318.

kvmd/application.py

@@ -23,8 +23,8 @@ from .yamlconf.loader import load_yaml_file
 
 
 # =====
-def init() -> Tuple[argparse.ArgumentParser, List[str], Section]:
-    args_parser = argparse.ArgumentParser(add_help=False)
+def init(prog: str=sys.argv[0], add_help: bool=True) -> Tuple[argparse.ArgumentParser, List[str], Section]:
+    args_parser = argparse.ArgumentParser(prog=prog, add_help=add_help)
     args_parser.add_argument("-c", "--config", dest="config_path", default="/etc/kvmd/kvmd.yaml", metavar="<file>")
     args_parser.add_argument("-o", "--set-options", dest="set_options", default=[], nargs="+")
     args_parser.add_argument("-m", "--dump-config", dest="dump_config", action="store_true")

kvmd/apps/cleanup/__init__.py

@@ -10,7 +10,7 @@ from ... import gpio
 
 # =====
 def main() -> None:
-    config = init()[2].kvmd
+    config = init("kvmd-cleanup")[2].kvmd
     logger = get_logger(0)
 
     logger.info("Cleaning up ...")

kvmd/apps/htpasswd/__init__.py

@@ -0,0 +1,91 @@
+import sys
+import os
+import re
+import getpass
+import tempfile
+import contextlib
+import argparse
+
+from typing import Generator
+
+import passlib.apache
+
+from ...yamlconf import Section
+
+from ...application import init
+
+
+# =====
+@contextlib.contextmanager
+def _get_htpasswd_for_write(config: Section) -> Generator[passlib.apache.HtpasswdFile, None, None]:
+    path = config.kvmd.auth.htpasswd
+    (tmp_fd, tmp_path) = tempfile.mkstemp(prefix=".", dir=os.path.dirname(path))
+    try:
+        try:
+            with open(path, "rb") as htpasswd_file:
+                os.write(tmp_fd, htpasswd_file.read())
+        finally:
+            os.close(tmp_fd)
+        htpasswd = passlib.apache.HtpasswdFile(tmp_path)
+        yield htpasswd
+        htpasswd.save()
+        os.rename(tmp_path, path)
+    finally:
+        if os.path.exists(tmp_path):
+            os.remove(tmp_path)
+
+
+def _valid_user(user: str) -> str:
+    stripped = user.strip()
+    if re.match(r"^[a-z_][a-z0-9_-]*$", stripped):
+        return stripped
+    raise SystemExit("Invalid user %r" % (user))
+
+
+# ====
+def _cmd_list(config: Section, _: argparse.Namespace) -> None:
+    for user in passlib.apache.HtpasswdFile(config.kvmd.auth.htpasswd).users():
+        print(user)
+
+
+def _cmd_set(config: Section, options: argparse.Namespace) -> None:
+    if options.read_stdin:
+        passwd = input()
+    else:
+        passwd = getpass.getpass("Password: ", stream=sys.stderr)
+        if getpass.getpass("Repeat: ", stream=sys.stderr) != passwd:
+            raise SystemExit("Sorry, passwords do not match")
+    with _get_htpasswd_for_write(config) as htpasswd:
+        htpasswd.set_password(options.user, passwd)
+
+
+def _cmd_delete(config: Section, options: argparse.Namespace) -> None:
+    with _get_htpasswd_for_write(config) as htpasswd:
+        htpasswd.delete(options.user)
+
+
+# =====
+def main() -> None:
+    (parent_parser, argv, config) = init(add_help=False)
+    parser = argparse.ArgumentParser(
+        prog="kvmd-htpasswd",
+        description="Manage KVMD users",
+        parents=[parent_parser],
+    )
+    parser.set_defaults(cmd=(lambda *_: parser.print_help()))
+    subparsers = parser.add_subparsers()
+
+    cmd_list_parser = subparsers.add_parser("list", help="List users")
+    cmd_list_parser.set_defaults(cmd=_cmd_list)
+
+    cmd_set_parser = subparsers.add_parser("set", help="Create user or change password")
+    cmd_set_parser.add_argument("user", type=_valid_user)
+    cmd_set_parser.add_argument("-i", "--read-stdin", action="store_true", help="Read password from stdin")
+    cmd_set_parser.set_defaults(cmd=_cmd_set)
+
+    cmd_delete_parser = subparsers.add_parser("del", help="Delete user")
+    cmd_delete_parser.add_argument("user", type=_valid_user)
+    cmd_delete_parser.set_defaults(cmd=_cmd_delete)
+
+    options = parser.parse_args(argv[1:])
+    options.cmd(config, options)

kvmd/apps/htpasswd/__main__.py

@@ -0,0 +1,2 @@
+from . import main
+main()

kvmd/apps/kvmd/__init__.py

@@ -17,7 +17,7 @@ from .server import Server
 
 # =====
 def main() -> None:
-    config = init()[2].kvmd
+    config = init("kvmd")[2].kvmd
     with gpio.bcm():
         loop = asyncio.get_event_loop()
 

setup.py

@@ -21,6 +21,7 @@ def main() -> None:
             "kvmd.yamlconf",
             "kvmd.apps",
             "kvmd.apps.kvmd",
+            "kvmd.apps.htpasswd",
             "kvmd.apps.cleanup",
         ],
 
@@ -31,6 +32,7 @@ def main() -> None:
         entry_points={
             "console_scripts": [
                 "kvmd = kvmd.apps.kvmd:main",
+                "kvmd-htpasswd = kvmd.apps.htpasswd:main",
                 "kvmd-cleanup = kvmd.apps.cleanup:main",
             ],
         },