+#!/usr/bin/python3
+
+import sys, os, getopt, binascii, json, pprint, signal, time
+import urllib.request
+import Crypto.PublicKey.RSA, Crypto.Random, Crypto.Hash.SHA256, Crypto.Signature.PKCS1_v1_5
+
+service = "https://acme-v02.api.letsencrypt.org/directory"
+_directory = None
+def directory():
+ global _directory
+ if _directory is None:
+ with req(service) as resp:
+ _directory = json.loads(resp.read().decode("utf-8"))
+ return _directory
+
+def base64url(dat):
+ return binascii.b2a_base64(dat).decode("us-ascii").translate({43: 45, 47: 95, 61: None}).strip()
+
+def ebignum(num):
+ h = "%x" % num
+ if len(h) % 2 == 1: h = "0" + h
+ return base64url(binascii.a2b_hex(h))
+
+def getnonce():
+ with urllib.request.urlopen(directory()["newNonce"]) as resp:
+ resp.read()
+ return resp.headers["Replay-Nonce"]
+
+def req(url, data=None, ctype=None, headers={}, method=None, **kws):
+ if data is not None and not isinstance(data, bytes):
+ data = json.dumps(data).encode("utf-8")
+ ctype = "application/jose+json"
+ req = urllib.request.Request(url, data=data, method=method)
+ for hnam, hval in headers.items():
+ req.add_header(hnam, hval)
+ if ctype is not None:
+ req.add_header("Content-Type", ctype)
+ return urllib.request.urlopen(req)
+
+def jreq(url, data, auth):
+ authdata = {"alg": "RS256", "url": url, "nonce": getnonce()}
+ authdata.update(auth.authdata())
+ authdata = base64url(json.dumps(authdata).encode("us-ascii"))
+ if data is None:
+ data = ""
+ else:
+ data = base64url(json.dumps(data).encode("us-ascii"))
+ seal = base64url(auth.sign(("%s.%s" % (authdata, data)).encode("us-ascii")))
+ enc = {"protected": authdata, "payload": data, "signature": seal}
+ with req(url, data=enc) as resp:
+ return json.loads(resp.read().decode("utf-8")), resp.headers
+
+class signreq(object):
+ def domains(self):
+ # No PCKS10 parser for Python?
+ import subprocess, re
+ with subprocess.Popen(["openssl", "req", "-noout", "-text"], stdin=subprocess.PIPE, stdout=subprocess.PIPE) as openssl:
+ openssl.stdin.write(self.data.encode("us-ascii"))
+ openssl.stdin.close()
+ resp = openssl.stdout.read().decode("utf8")
+ if openssl.wait() != 0:
+ raise Exception("openssl error")
+ m = re.search(r"X509v3 Subject Alternative Name:[^\n]*\n\s*((\w+:\S+,\s*)*\w+:\S+)\s*\n", resp)
+ if m is None:
+ return []
+ ret = []
+ for nm in m.group(1).split(","):
+ nm = nm.strip()
+ typ, nm = nm.split(":", 1)
+ if typ == "DNS":
+ ret.append(nm)
+ return ret
+
+ def der(self):
+ import subprocess
+ with subprocess.Popen(["openssl", "req", "-outform", "der"], stdin=subprocess.PIPE, stdout=subprocess.PIPE) as openssl:
+ openssl.stdin.write(self.data.encode("us-ascii"))
+ openssl.stdin.close()
+ resp = openssl.stdout.read()
+ if openssl.wait() != 0:
+ raise Exception("openssl error")
+ return resp
+
+ @classmethod
+ def read(cls, fp):
+ self = cls()
+ self.data = fp.read()
+ return self
+
+class jwkauth(object):
+ def __init__(self, key):
+ self.key = key
+
+ def authdata(self):
+ return {"jwk": {"kty": "RSA", "e": ebignum(self.key.e), "n": ebignum(self.key.n)}}
+
+ def sign(self, data):
+ dig = Crypto.Hash.SHA256.new()
+ dig.update(data)
+ return Crypto.Signature.PKCS1_v1_5.new(self.key).sign(dig)
+
+class account(object):
+ def __init__(self, uri, key):
+ self.uri = uri
+ self.key = key
+
+ def authdata(self):
+ return {"kid": self.uri}
+
+ def sign(self, data):
+ dig = Crypto.Hash.SHA256.new()
+ dig.update(data)
+ return Crypto.Signature.PKCS1_v1_5.new(self.key).sign(dig)
+
+ def getinfo(self):
+ data, headers = jreq(self.uri, None, self)
+ return data
+
+ def validate(self):
+ data = self.getinfo()
+ if data.get("status", "") != "valid":
+ raise Exception("account is not valid: %s" % (data.get("status", "\"\"")))
+
+ def write(self, out):
+ out.write("%s\n" % (self.uri,))
+ out.write("%s\n" % (self.key.exportKey().decode("us-ascii"),))
+
+ @classmethod
+ def read(cls, fp):
+ uri = fp.readline()
+ if uri == "":
+ raise Exception("missing account URI")
+ uri = uri.strip()
+ key = Crypto.PublicKey.RSA.importKey(fp.read())
+ return cls(uri, key)
+
+class htconfig(object):
+ def __init__(self):
+ self.roots = {}
+
+ @classmethod
+ def read(cls, fp):
+ self = cls()
+ for ln in fp:
+ words = ln.split()
+ if len(words) < 1 or ln[0] == '#':
+ continue
+ if words[0] == "root":
+ self.roots[words[1]] = words[2]
+ else:
+ sys.stderr.write("acmecert: warning: unknown htconfig directive: %s\n" % (words[0]))
+ return self
+
+def register(keysize=4096):
+ key = Crypto.PublicKey.RSA.generate(keysize, Crypto.Random.new().read)
+ # jwk = {"kty": "RSA", "e": ebignum(key.e), "n": ebignum(key.n)}
+ # cjwk = json.dumps(jwk, separators=(',', ':'), sort_keys=True)
+ data, headers = jreq(directory()["newAccount"], {"termsOfServiceAgreed": True}, jwkauth(key))
+ return account(headers["Location"], key)
+
+def mkorder(acct, csr):
+ data, headers = jreq(directory()["newOrder"], {"identifiers": [{"type": "dns", "value": dn} for dn in csr.domains()]}, acct)
+ data["acmecert.location"] = headers["Location"]
+ return data
+
+def httptoken(acct, ch):
+ jwk = {"kty": "RSA", "e": ebignum(acct.key.e), "n": ebignum(acct.key.n)}
+ dig = Crypto.Hash.SHA256.new()
+ dig.update(json.dumps(jwk, separators=(',', ':'), sort_keys=True).encode("us-ascii"))
+ khash = base64url(dig.digest())
+ return ch["token"], ("%s.%s" % (ch["token"], khash))
+
+def authorder(acct, htconf, orderid):
+ order, headers = jreq(orderid, None, acct)
+ valid = False
+ tries = 0
+ while not valid:
+ valid = True
+ tries += 1
+ if tries > 5:
+ raise Exception("challenges refuse to become valid even after 5 retries")
+ for authuri in order["authorizations"]:
+ auth, headers = jreq(authuri, None, acct)
+ if auth["status"] == "valid":
+ continue
+ elif auth["status"] == "pending":
+ pass
+ else:
+ raise Exception("unknown authorization status: %s" % (auth["status"],))
+ valid = False
+ if auth["identifier"]["type"] != "dns":
+ raise Exception("unknown authorization type: %s" % (auth["identifier"]["type"],))
+ dn = auth["identifier"]["value"]
+ if dn not in htconf.roots:
+ raise Exception("no configured ht-root for domain name %s" % (dn,))
+ for ch in auth["challenges"]:
+ if ch["type"] == "http-01":
+ break
+ else:
+ raise Exception("no http-01 challenge for %s" % (dn,))
+ root = htconf.roots[dn]
+ tokid, tokval = httptoken(acct, ch)
+ tokpath = os.path.join(root, tokid);
+ fp = open(tokpath, "w")
+ try:
+ with fp:
+ fp.write(tokval)
+ with req("http://%s/.well-known/acme-challenge/%s" % (dn, tokid)) as resp:
+ if resp.read().decode("utf-8") != tokval:
+ raise Exception("challenge from %s does not match written value" % (dn,))
+ for n in range(30):
+ resp, headers = jreq(ch["url"], {}, acct)
+ if resp["status"] == "processing":
+ time.sleep(2)
+ elif resp["status"] == "valid":
+ break
+ else:
+ raise Exception("unexpected challenge status for %s when validating: %s" % (dn, resp["status"]))
+ else:
+ raise Exception("challenge processing timed out for %s" % (dn,))
+ finally:
+ os.unlink(tokpath)
+
+def finalize(acct, csr, orderid):
+ order, headers = jreq(orderid, None, acct)
+ if order["status"] == "valid":
+ pass
+ elif order["status"] == "ready":
+ jreq(order["finalize"], {"csr": base64url(csr.der())}, acct)
+ for n in range(30):
+ resp, headers = jreq(orderid, None, acct)
+ if resp["status"] == "processing":
+ time.sleep(2)
+ elif resp["status"] == "valid":
+ order = resp
+ break
+ else:
+ raise Exception("unexpected order status when finalizing: %s" % resp["status"])
+ else:
+ raise Exception("order finalization timed out")
+ else:
+ raise Exception("unexpected order state when finalizing: %s" % (order["status"],))
+ with req(order["certificate"]) as resp:
+ return resp.read().decode("us-ascii")
+
+def usage(out):
+ out.write("usage: acmecert [-h] [-D SERVICE]\n")
+
+def main(argv):
+ global service
+ opts, args = getopt.getopt(argv[1:], "hD:")
+ for o, a in opts:
+ if o == "-h":
+ usage(sys.stdout)
+ sys.exit(0)
+ elif o == "-D":
+ service = a
+ if len(args) < 1:
+ usage(sys.stderr)
+ sys.exit(1)
+ if args[0] == "reg":
+ register().write(sys.stdout)
+ elif args[0] == "validate-acct":
+ with open(args[1], "r") as fp:
+ account.read(fp).validate()
+ elif args[0] == "acctinfo":
+ with open(args[1], "r") as fp:
+ pprint.pprint(account.read(fp).getinfo())
+ elif args[0] == "order":
+ with open(args[1], "r") as fp:
+ acct = account.read(fp)
+ with open(args[2], "r") as fp:
+ csr = signreq.read(fp)
+ order = mkorder(acct, csr)
+ with open(args[3], "w") as fp:
+ fp.write("%s\n" % (order["acmecert.location"]))
+ elif args[0] == "http-auth":
+ with open(args[1], "r") as fp:
+ acct = account.read(fp)
+ with open(args[2], "r") as fp:
+ htconf = htconfig.read(fp)
+ with open(args[3], "r") as fp:
+ orderid = fp.readline().strip()
+ authorder(acct, htconf, orderid)
+ elif args[0] == "get":
+ with open(args[1], "r") as fp:
+ acct = account.read(fp)
+ with open(args[2], "r") as fp:
+ csr = signreq.read(fp)
+ with open(args[3], "r") as fp:
+ orderid = fp.readline().strip()
+ sys.stdout.write(finalize(acct, csr, orderid))
+ elif args[0] == "http-order":
+ with open(args[1], "r") as fp:
+ acct = account.read(fp)
+ with open(args[2], "r") as fp:
+ csr = signreq.read(fp)
+ with open(args[3], "r") as fp:
+ htconf = htconfig.read(fp)
+ orderid = mkorder(acct, csr)["acmecert.location"]
+ authorder(acct, htconf, orderid)
+ sys.stdout.write(finalize(acct, csr, orderid))
+ elif args[0] == "directory":
+ pprint.pprint(directory())
+ else:
+ sys.stderr.write("acmecert: unknown command: %s\n" % (args[0],))
+ usage(sys.stderr)
+ sys.exit(1)
+
+if __name__ == "__main__":
+ try:
+ main(sys.argv)
+ except KeyboardInterrupt:
+ signal.signal(signal.SIGINT, signal.SIG_DFL)
+ os.kill(os.getpid(), signal.SIGINT)
Dolda2000 GitWeb / utils.git / commitdiff