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authorAlex Auvolat <alex@adnab.me>2022-12-25 19:52:28 +0100
committerAlex Auvolat <alex@adnab.me>2022-12-25 19:52:28 +0100
commit7fd81f347006ca6ebaf6f0cf149a4d8c1f8086b0 (patch)
treef51fa77ac6501b6f5f01c6c1df613b0d687a5a90 /secretmgr
parent11f87a3cd2c16a21fdd93690b35cd7bac4c21f85 (diff)
downloadnixcfg-7fd81f347006ca6ebaf6f0cf149a4d8c1f8086b0.tar.gz
nixcfg-7fd81f347006ca6ebaf6f0cf149a4d8c1f8086b0.zip
WIP new secretmgr
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-#!/usr/bin/env nix-shell
-#!nix-shell -i python3 -p "python3.withPackages(ps: [ ps.pip ps.consul ps.ldap ps.passlib ps.requests ps.six ])"
-
-# DEPENDENCY: python-consul
-import consul
-
-# DEPENDENCY: python-ldap
-import ldap
-
-# DEPENDENCY: passlib
-from passlib.hash import ldap_salted_sha1
-
-import os
-import sys
-import glob
-import subprocess
-import getpass
-import base64
-from secrets import token_bytes
-
-
-"""
-TODO: this will be a utility to handle secrets in the Consul database
-for the various components of the Deuxfleurs infrastructure
-
-Functionnalities:
-- check that secrets are correctly configured
-- help user fill in secrets
-- create LDAP service users and fill in corresponding secrets
-- maybe one day: manage SSL certificates and keys
-
-It uses files placed in <module_name>/secrets/* to know what secrets
-it should handle. These secret files contain directives for what to do
-about these secrets.
-
-Example directives:
-
-USER <description>
-(a secret that must be filled in by the user)
-
-USER_LONG <description>
-(the same, indicates that the secret fits on several lines)
-
-CMD <command>
-(a secret that is generated by running this command)
-
-CMD_ONCE <command>
-(same, but value is not changed when doing a regen)
-
-CONST <constant value>
-(the secret has a constant value set here)
-
-CONST_LONG
-<constant value, several lines>
-(same)
-
-SERVICE_DN <service name> <service description>
-(the LDAP DN of a service user)
-
-SERVICE_PASSWORD <service name>
-(the LDAP password for the corresponding service user)
-
-SSL_CERT <cert name> <list of domains>
-(a SSL domain for the given domains)
-
-SSL_KEY <cert name>
-(the SSL key going with corresponding certificate)
-
-RSA_PUBLIC_KEY <key name> <key description>
-(a public RSA key)
-
-RSA_PRIVATE_KEY <key name>
-(the corresponding private RSA key)
-"""
-
-
-# Parameters
-LDAP_URL = "ldap://localhost:1389"
-SERVICE_DN_SUFFIX = "ou=services,ou=users,dc=deuxfleurs,dc=fr"
-consul_server = consul.Consul()
-
-
-# ----
-
-USER = "USER"
-USER_LONG = "USER_LONG"
-CMD = "CMD"
-CMD_ONCE = "CMD_ONCE"
-CONST = "CONST"
-CONST_LONG = "CONST_LONG"
-SERVICE_DN = "SERVICE_DN"
-SERVICE_PASSWORD = "SERVICE_PASSWORD"
-SSL_CERT = "SSL_CERT"
-SSL_KEY = "SSL_KEY"
-RSA_PUBLIC_KEY = "RSA_PUBLIC_KEY"
-RSA_PRIVATE_KEY = "RSA_PRIVATE_KEY"
-
-class bcolors:
- HEADER = '\033[95m'
- OKBLUE = '\033[94m'
- OKCYAN = '\033[96m'
- OKGREEN = '\033[92m'
- WARNING = '\033[93m'
- FAIL = '\033[91m'
- ENDC = '\033[0m'
- BOLD = '\033[1m'
- UNDERLINE = '\033[4m'
-
-def read_secret(key, file_path):
- lines = [l.strip() for l in open(file_path, "r")]
- if len(lines) == 0:
- print(bcolors.FAIL, "ERROR:", bcolors.ENDC, "Empty file in", file_path)
- sys.exit(-1)
- l0 = lines[0].split(" ")
- stype = l0[0]
- secret = {"type": stype, "key": key}
- if stype in [USER, USER_LONG]:
- secret["desc"] = " ".join(l0[1:])
- elif stype in [CMD, CMD_ONCE]:
- secret["cmd"] = " ".join(l0[1:])
- elif stype == CONST:
- secret["value"] = " ".join(l0[1:])
- elif stype == CONST_LONG:
- secret["value"] = "\n".join(lines[1:])
- elif stype in [SERVICE_DN, SERVICE_PASSWORD]:
- secret["service"] = l0[1]
- if stype == SERVICE_DN:
- secret["service_desc"] = " ".join(l0[2:])
- elif stype in [SSL_CERT, SSL_KEY]:
- secret["cert_name"] = l0[1]
- if stype == SSL_CERT:
- secret["cert_domains"] = l0[2:]
- elif stype in [RSA_PUBLIC_KEY, RSA_PRIVATE_KEY]:
- secret["key_name"] = l0[1]
- if stype == RSA_PUBLIC_KEY:
- secret["key_desc"] = " ".join(l0[2:])
- else:
- print(bcolors.FAIL, "ERROR:", bcolors.ENDC, "Invalid secret type", stype, "in", file_path)
- sys.exit(-1)
-
- return secret
-
-def read_secrets(module_list):
- secrets = {}
- for mod in module_list:
- for file_path in glob.glob(mod.strip('/') + "/secrets/**", recursive=True):
- if os.path.isfile(file_path):
- key = '/'.join(file_path.split("/")[1:])
- secrets[key] = read_secret(key, file_path)
- return secrets
-
-def get_secrets_services(secrets):
- services = {}
- for key, secret in secrets.items():
- if secret["type"] not in [SERVICE_DN, SERVICE_PASSWORD]:
- continue
- svc = secret["service"]
- print(svc, "@", key, bcolors.OKCYAN, "...", bcolors.ENDC)
- if svc not in services:
- services[svc] = {
- "dn": "cn=%s,%s"%(svc, SERVICE_DN_SUFFIX),
- "desc": "(not provided)",
- "pass": None,
- "dn_at": [],
- "pass_at": [],
- }
- if secret["type"] == SERVICE_DN:
- services[svc]["dn_at"].append(key)
- services[svc]["desc"] = secret["service_desc"]
-
- if secret["type"] == SERVICE_PASSWORD:
- services[svc]["pass_at"].append(key)
- _, data = consul_server.kv.get(key)
- if data is not None:
- if services[svc]["pass"] is None:
- services[svc]["pass"] = data["Value"].decode('ascii').strip()
-
- return services
-
-ldap_admin_conn = None
-def get_ldap_admin_conn():
- global ldap_admin_conn
- if ldap_admin_conn is None:
- ldap_admin_conn = ldap.initialize(LDAP_URL)
- ldap_user = input("LDAP admin user (full DN, please!): ")
- ldap_pass = getpass.getpass("LDAP admin password: ")
- ldap_admin_conn.simple_bind_s(ldap_user, ldap_pass)
- return ldap_admin_conn
-
-# ---- CHECK COMMAND ----
-
-def check_secrets(module_list):
- secrets = read_secrets(module_list)
- print("Found", len(secrets), "secrets to check")
- print()
-
- check_secrets_presence(secrets)
- check_secrets_services(secrets)
-
-def check_secrets_presence(secrets):
- print("Checking secrets presence...")
- for key in secrets.keys():
- _, data = consul_server.kv.get(key)
- if data is None:
- print(key, bcolors.FAIL, "x", bcolors.ENDC)
- else:
- print(key, bcolors.OKGREEN, "✓", bcolors.ENDC)
- print()
-
-def check_secrets_services(secrets):
- print("Checking secrets for LDAP service users...")
- services = get_secrets_services(secrets)
-
- for svc_name, svc in services.items():
- for dn_key in svc["dn_at"]:
- _, data = consul_server.kv.get(dn_key)
- if data is not None:
- got_val = data["Value"].decode('ascii').strip()
- if got_val != svc["dn"]:
- print(svc_name, "wrong DN at", dn_key, bcolors.FAIL, "x", bcolors.ENDC)
- print("got:", got_val, "instead of:", svc["dn"])
-
- if svc["pass"] is None:
- print(svc_name, bcolors.FAIL, "no password stored", bcolors.ENDC)
- else:
- for pass_key in svc["pass_at"]:
- _, data = consul_server.kv.get(pass_key)
- if data is not None:
- got_val = data["Value"].decode('ascii').strip()
- if got_val != svc["pass"]:
- print(svc_name, "wrong pass at", dn_key, bcolors.FAIL, "x", bcolors.ENDC)
-
- l = ldap.initialize(LDAP_URL)
- try:
- l.simple_bind_s(svc["dn"], svc["pass"])
- print(svc_name, bcolors.OKGREEN, "✓", bcolors.ENDC)
- except Exception as e:
- print(svc_name, bcolors.FAIL, e, bcolors.ENDC)
- print()
-
-
-# ---- GEN COMMAND ----
-
-def gen_secrets(module_list, regen):
- secrets = read_secrets(module_list)
- print("Found", len(secrets), "secrets to check and maybe generate")
- print()
-
- gen_secrets_base(secrets, regen)
- gen_secrets_services(secrets, regen)
-
- check_secrets_presence(secrets)
- check_secrets_services(secrets)
-
-def gen_secrets_base(secrets, regen):
- print("Filling in user secrets and cmd secrets...")
-
- for key, secret in secrets.items():
- _, data = consul_server.kv.get(key)
- if data is not None and not regen:
- continue
-
- if secret["type"] == USER:
- print("----")
- print(key)
- print("Description:", secret["desc"])
- print("Enter value for secret, or ^C to skip:")
- try:
- val = input().strip()
- consul_server.kv.put(key, val)
- print(bcolors.OKCYAN, "Value set.", bcolors.ENDC)
- except KeyboardInterrupt:
- print(bcolors.WARNING, "Skipped.", bcolors.ENDC)
-
- if secret["type"] == USER_LONG:
- print("----")
- print(key)
- print("Description:", secret["desc"])
- print("Enter value for secret, or ^C to skip:")
- print("THIS IS A LONG VALUE, ENTER SEVERAL LINES AND FINISH WITH A LINE CONTAINING A SINGLE .")
- try:
- lines = []
- while True:
- line = input().strip()
- if line == ".":
- break
- lines.append(line)
- val = "\n".join(lines)
- consul_server.kv.put(key, val)
- print(bcolors.OKCYAN, "Value set.", bcolors.ENDC)
- except KeyboardInterrupt:
- print(bcolors.WARNING, "Skipped.", bcolors.ENDC)
-
- if secret["type"] in [CONST, CONST_LONG]:
- print("----")
- print(key)
- print("Resetting to constant value.")
- consul_server.kv.put(key, secret["value"])
- print(bcolors.OKCYAN, "Value set.", bcolors.ENDC)
-
- if secret["type"] == CMD or (secret["type"] == CMD_ONCE and data is None):
- print("----")
- print(key)
- print("Executing command:", secret["cmd"])
- val = subprocess.check_output(["sh", "-c", secret["cmd"]])
- consul_server.kv.put(key, val)
- print(bcolors.OKCYAN, "Value set.", bcolors.ENDC)
-
- print()
-
-def gen_secrets_services(secrets, regen):
- print("Generating LDAP service accounts...")
- services = get_secrets_services(secrets)
-
- for svc_name, svc in services.items():
- print("----")
- print("Service:", svc_name)
- print("Description:", svc["desc"])
-
- for dn_key in svc["dn_at"]:
- _, data = consul_server.kv.get(dn_key)
- if data is None or data["Value"].decode('ascii').strip() != svc["dn"]:
- print(bcolors.OKCYAN, "Setting DN", bcolors.ENDC, "at", dn_key)
- consul_server.kv.put(dn_key, svc["dn"])
-
- if svc["pass"] is None or regen:
- print(bcolors.OKCYAN, "Generating new password", bcolors.ENDC)
- svc["pass"] = base64.urlsafe_b64encode(token_bytes(12)).decode('ascii')
-
- l = ldap.initialize(LDAP_URL)
- try:
- l.simple_bind_s(svc["dn"], svc["pass"])
- except:
- fix_service_user(svc)
-
- for pass_key in svc["pass_at"]:
- _, data = consul_server.kv.get(pass_key)
- if data is None or data["Value"].decode('ascii').strip() != svc["pass"]:
- print(bcolors.OKCYAN, "Setting password", bcolors.ENDC, "at", pass_key)
- consul_server.kv.put(pass_key, svc["pass"])
-
- print()
-
-def fix_service_user(svc):
- print("Fixing service user", svc["dn"], "...")
- l = get_ldap_admin_conn()
- res = l.search_s(svc["dn"], ldap.SCOPE_BASE, "objectclass=*")
- pass_crypt = ldap_salted_sha1.hash(svc["pass"])
- if res is None or len(res) == 0:
- print(bcolors.OKCYAN, "Creating entity...", bcolors.ENDC)
- l.add_s(svc["dn"],
- [
- ("objectclass", [b"person", b"top"]),
- ("displayname", [svc["desc"].encode('ascii')]),
- ("userpassword", [pass_crypt.encode('ascii')]),
- ])
- else:
- print(bcolors.OKCYAN, "Resetting entity password", bcolors.ENDC)
- l.modify_s(svc["dn"],
- [
- (ldap.MOD_REPLACE, "userpassword", [pass_crypt.encode('ascii')])
- ])
-
-# ---- MAIN ----
-
-if __name__ == "__main__":
- for i, val in enumerate(sys.argv):
- if val == "check":
- check_secrets(sys.argv[i+1:])
- break
- elif val == "gen":
- gen_secrets(sys.argv[i+1:], False)
- break
- elif val == "regen":
- gen_secrets(sys.argv[i+1:], True)
- break
- else:
- print("Usage:")
- print(" secretmgr.py [check|gen|regen] <module name>...")
-
-
-# vim: set sts=4 ts=4 sw=4 tw=0 ft=python et :