#!/usr/bin/python3
-import sys, os, getopt, binascii, json, pprint, signal, time, threading
+#### ACME client (only http-01 challenges supported thus far)
+
+import sys, os, getopt, binascii, json, pprint, signal, time, calendar, threading
import urllib.request
-import Crypto.PublicKey.RSA, Crypto.Random, Crypto.Hash.SHA256, Crypto.Signature.PKCS1_v1_5
+
+### General utilities
class msgerror(Exception):
def report(self, out):
out.write("acmecert: undefined error\n")
-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()
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"]
+class maybeopen(object):
+ def __init__(self, name, mode):
+ if name == "-":
+ self.opened = False
+ if mode == "r":
+ self.fp = sys.stdin
+ elif mode == "w":
+ self.fp = sys.stdout
+ else:
+ raise ValueError(mode)
+ else:
+ self.opened = True
+ self.fp = open(name, mode)
-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 __enter__(self):
+ return self.fp
-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
+ def __exit__(self, *excinfo):
+ if self.opened:
+ self.fp.close()
+ return False
+
+### Crypto utilities
+
+_cryptobke = None
+def cryptobke():
+ global _cryptobke
+ if _cryptobke is None:
+ from cryptography.hazmat import backends
+ _cryptobke = backends.default_backend()
+ return _cryptobke
+
+class dererror(Exception):
+ pass
+
+class pemerror(Exception):
+ pass
+
+def pemdec(pem, ptypes):
+ if isinstance(ptypes, str):
+ ptypes = [ptypes]
+ p = 0
+ while True:
+ p = pem.find("-----BEGIN ", p)
+ if p < 0:
+ raise pemerror("could not find any %s in PEM-encoded data" % (ptypes,))
+ p2 = pem.find("-----", p + 11)
+ if p2 < 0:
+ raise pemerror("incomplete PEM header")
+ ptype = pem[p + 11 : p2]
+ if ptype not in ptypes:
+ p = p2 + 5
+ continue
+ p3 = pem.find("-----END " + ptype + "-----", p2 + 5)
+ if p3 < 0:
+ raise pemerror("incomplete PEM data")
+ pem = pem[p2 + 5 : p3]
+ return binascii.a2b_base64(pem)
+
+class derdecoder(object):
+ def __init__(self, data, offset=0, size=None):
+ self.data = data
+ self.offset = offset
+ self.size = len(data) if size is None else size
+
+ def end(self):
+ return self.offset >= self.size
+
+ def byte(self):
+ if self.offset >= self.size:
+ raise dererror("unexpected end-of-data")
+ ret = self.data[self.offset]
+ self.offset += 1
+ return ret
+
+ def splice(self, ln):
+ if self.offset + ln > self.size:
+ raise dererror("unexpected end-of-data")
+ ret = self.data[self.offset : self.offset + ln]
+ self.offset += ln
+ return ret
+
+ def dectag(self):
+ h = self.byte()
+ cl = (h & 0xc0) >> 6
+ cons = (h & 0x20) != 0
+ tag = h & 0x1f
+ if tag == 0x1f:
+ raise dererror("extended type tags not supported")
+ return cl, cons, tag
+
+ def declen(self):
+ h = self.byte()
+ if (h & 0x80) == 0:
+ return h
+ if h == 0x80:
+ raise dererror("indefinite lengths not supported in DER")
+ if h == 0xff:
+ raise dererror("invalid length byte")
+ n = h & 0x7f
+ ret = 0
+ for i in range(n):
+ ret = (ret << 8) + self.byte()
+ return ret
+
+ def get(self):
+ cl, cons, tag = self.dectag()
+ ln = self.declen()
+ return cons, cl, tag, self.splice(ln)
+
+ def getcons(self, ckcl, cktag):
+ cons, cl, tag, data = self.get()
+ if not cons:
+ raise dererror("expected constructed value")
+ if (ckcl != None and ckcl != cl) or (cktag != None and cktag != tag):
+ raise dererror("unexpected value tag: got (%d, %d), expected (%d, %d)" % (cl, tag, ckcl, cktag))
+ return derdecoder(data)
+
+ def getint(self):
+ cons, cl, tag, data = self.get()
+ if (cons, cl, tag) == (False, 0, 2):
+ ret = 0
+ for b in data:
+ ret = (ret << 8) + b
+ return ret
+ raise dererror("unexpected integer type: (%s, %d, %d)" % (cons, cl, tag))
+
+ def getstr(self):
+ cons, cl, tag, data = self.get()
+ if (cons, cl, tag) == (False, 0, 12):
+ return data.decode("utf-8")
+ if (cons, cl, tag) == (False, 0, 13):
+ return data.decode("us-ascii")
+ if (cons, cl, tag) == (False, 0, 22):
+ return data.decode("us-ascii")
+ if (cons, cl, tag) == (False, 0, 30):
+ return data.decode("utf-16-be")
+ raise dererror("unexpected string type: (%s, %d, %d)" % (cons, cl, tag))
+
+ def getbytes(self):
+ cons, cl, tag, data = self.get()
+ if (cons, cl, tag) == (False, 0, 4):
+ return data
+ raise dererror("unexpected byte-string type: (%s, %d, %d)" % (cons, cl, tag))
+
+ def getoid(self):
+ cons, cl, tag, data = self.get()
+ if (cons, cl, tag) == (False, 0, 6):
+ ret = []
+ ret.append(data[0] // 40)
+ ret.append(data[0] % 40)
+ p = 1
+ while p < len(data):
+ n = 0
+ v = data[p]
+ p += 1
+ while v & 0x80:
+ n = (n + (v & 0x7f)) * 128
+ v = data[p]
+ p += 1
+ n += v
+ ret.append(n)
+ return tuple(ret)
+ raise dererror("unexpected object-id type: (%s, %d, %d)" % (cons, cl, tag))
+
+ @staticmethod
+ def parsetime(data, c):
+ if c:
+ y = int(data[0:4])
+ data = data[4:]
+ else:
+ y = int(data[0:2])
+ y += 1900 if y > 50 else 2000
+ data = data[2:]
+ m = int(data[0:2])
+ d = int(data[2:4])
+ H = int(data[4:6])
+ data = data[6:]
+ if data[:1].isdigit():
+ M = int(data[0:2])
+ data = data[2:]
+ else:
+ M = 0
+ if data[:1].isdigit():
+ S = int(data[0:2])
+ data = data[2:]
+ else:
+ S = 0
+ if data[:1] == '.':
+ p = 1
+ while len(data) < p and data[p].isdigit():
+ p += 1
+ S += float("0." + data[1:p])
+ data = data[p:]
+ if len(data) < 1:
+ raise dererror("unspecified local time not supported for decoding")
+ if data[0] == 'Z':
+ tz = 0
+ elif data[0] == '+':
+ tz = (int(data[1:3]) * 60) + int(data[3:5])
+ elif data[0] == '-':
+ tz = -((int(data[1:3]) * 60) + int(data[3:5]))
+ else:
+ raise dererror("cannot parse X.690 timestamp")
+ return calendar.timegm((y, m, d, H, M, S)) - (tz * 60)
+
+ def gettime(self):
+ cons, cl, tag, data = self.get()
+ if (cons, cl, tag) == (False, 0, 23):
+ return self.parsetime(data.decode("us-ascii"), False)
+ if (cons, cl, tag) == (False, 0, 24):
+ return self.parsetime(data.decode("us-ascii"), True)
+ raise dererror("unexpected time type: (%s, %d, %d)" % (cons, cl, tag))
+
+ @classmethod
+ def frompem(cls, pem, ptypes):
+ return cls(pemdec(pem, ptypes))
class certificate(object):
- @property
- def enddate(self):
- # No X509 parser for Python?
- import subprocess, re, calendar
- with subprocess.Popen(["openssl", "x509", "-noout", "-enddate"], stdin=subprocess.PIPE, stdout=subprocess.PIPE) as openssl:
- openssl.stdin.write(self.data.encode("us-ascii"))
- openssl.stdin.close()
- resp = openssl.stdout.read().decode("utf-8")
- if openssl.wait() != 0:
- raise Exception("openssl error")
- m = re.search(r"notAfter=(.*)$", resp)
- if m is None: raise Exception("unexpected openssl reply: %r" % (resp,))
- return calendar.timegm(time.strptime(m.group(1), "%b %d %H:%M:%S %Y GMT"))
+ def __init__(self, der):
+ ci = der.getcons(0, 16).getcons(0, 16)
+ self.ver = ci.getcons(2, 0).getint()
+ self.serial = ci.getint()
+ ci.getcons(0, 16) # Signature algorithm
+ ci.getcons(0, 16) # Issuer
+ vl = ci.getcons(0, 16)
+ self.startdate = vl.gettime()
+ self.enddate = vl.gettime()
def expiring(self, timespec):
if timespec.endswith("y"):
@classmethod
def read(cls, fp):
- self = cls()
- self.data = fp.read()
- return self
+ return cls(derdecoder.frompem(fp.read(), {"CERTIFICATE", "X509 CERTIFICATE"}))
class signreq(object):
+ def __init__(self, der):
+ self.raw = der
+ req = derdecoder(der).getcons(0, 16).getcons(0, 16)
+ self.ver = req.getint()
+ req.getcons(0, 16) # Subject
+ req.getcons(0, 16) # Public key
+ self.altnames = []
+ if not req.end():
+ attrs = req.getcons(2, 0)
+ while not attrs.end():
+ attr = attrs.getcons(0, 16)
+ anm = attr.getoid()
+ if anm == (1, 2, 840, 113549, 1, 9, 14):
+ # Certificate extension request
+ exts = attr.getcons(0, 17).getcons(0, 16)
+ while not exts.end():
+ ext = exts.getcons(0, 16)
+ extnm = ext.getoid()
+ if extnm == (2, 5, 29, 17):
+ # Subject alternative names
+ names = derdecoder(ext.getbytes()).getcons(0, 16)
+ while not names.end():
+ cons, cl, tag, data = names.get()
+ if (cons, cl, tag) == (False, 2, 2):
+ self.altnames.append(("DNS", data.decode("us-ascii")))
+
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("utf-8")
- 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
+ return [nm[1] for nm in self.altnames if nm[0] == "DNS"]
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
+ return self.raw
@classmethod
def read(cls, fp):
- self = cls()
- self.data = fp.read()
+ return cls(pemdec(fp.read(), {"CERTIFICATE REQUEST"}))
+
+### Somewhat general request utilities
+
+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)
+
+class problem(msgerror):
+ def __init__(self, code, data, *args, url=None, **kw):
+ super().__init__(*args, **kw)
+ self.code = code
+ self.data = data
+ self.url = url
+ if not isinstance(data, dict):
+ raise ValueError("unexpected problem object type: %r" % (data,))
+
+ @property
+ def type(self):
+ return self.data.get("type", "about:blank")
+ @property
+ def title(self):
+ return self.data.get("title")
+ @property
+ def detail(self):
+ return self.data.get("detail")
+
+ def report(self, out):
+ extra = None
+ if self.title is None:
+ msg = self.detail
+ if "\n" in msg:
+ extra, msg = msg, None
+ else:
+ msg = self.title
+ extra = self.detail
+ if msg is None:
+ msg = self.data.get("type")
+ if msg is not None:
+ out.write("acemcert: %s: %s\n" % (
+ ("remote service error" if self.url is None else self.url),
+ ("unspecified error" if msg is None else msg)))
+ if extra is not None:
+ out.write("%s\n" % (extra,))
+
+ @classmethod
+ def read(cls, err, **kw):
+ self = cls(err.code, json.loads(err.read().decode("utf-8")), **kw)
return self
+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}
+ try:
+ with req(url, data=enc) as resp:
+ return json.loads(resp.read().decode("utf-8")), resp.headers
+ except urllib.error.HTTPError as exc:
+ if exc.headers["Content-Type"] == "application/problem+json":
+ raise problem.read(exc, url=url)
+ raise
+
+## Authentication
+
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)}}
+ pub = self.key.public_key().public_numbers()
+ return {"jwk": {"kty": "RSA", "e": ebignum(pub.e), "n": ebignum(pub.n)}}
def sign(self, data):
- dig = Crypto.Hash.SHA256.new()
- dig.update(data)
- return Crypto.Signature.PKCS1_v1_5.new(self.key).sign(dig)
+ from cryptography.hazmat.primitives import hashes
+ from cryptography.hazmat.primitives.asymmetric import padding
+ return self.key.sign(data, padding.PKCS1v15(), hashes.SHA256())
class account(object):
def __init__(self, uri, key):
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)
+ from cryptography.hazmat.primitives import hashes
+ from cryptography.hazmat.primitives.asymmetric import padding
+ return self.key.sign(data, padding.PKCS1v15(), hashes.SHA256())
def getinfo(self):
data, headers = jreq(self.uri, None, self)
raise Exception("account is not valid: %s" % (data.get("status", "\"\"")))
def write(self, out):
+ from cryptography.hazmat.primitives import serialization
out.write("%s\n" % (self.uri,))
- out.write("%s\n" % (self.key.exportKey().decode("us-ascii"),))
+ out.write("%s\n" % (self.key.private_bytes(
+ encoding=serialization.Encoding.PEM,
+ format=serialization.PrivateFormat.TraditionalOpenSSL,
+ encryption_algorithm=serialization.NoEncryption()
+ ).decode("us-ascii"),))
@classmethod
def read(cls, fp):
+ from cryptography.hazmat.primitives import serialization
uri = fp.readline()
if uri == "":
raise Exception("missing account URI")
uri = uri.strip()
- key = Crypto.PublicKey.RSA.importKey(fp.read())
+ key = serialization.load_pem_private_key(fp.read().encode("us-ascii"), password=None, backend=cryptobke())
return cls(uri, key)
+### ACME protocol
+
+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 register(keysize=4096):
+ from cryptography.hazmat.primitives.asymmetric import rsa
+ key = rsa.generate_private_key(public_exponent=65537, key_size=keysize, backend=cryptobke())
+ 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):
+ from cryptography.hazmat.primitives import hashes
+ pub = acct.key.public_key().public_numbers()
+ jwk = {"kty": "RSA", "e": ebignum(pub.e), "n": ebignum(pub.n)}
+ dig = hashes.Hash(hashes.SHA256(), backend=cryptobke())
+ dig.update(json.dumps(jwk, separators=(',', ':'), sort_keys=True).encode("us-ascii"))
+ khash = base64url(dig.finalize())
+ return ch["token"], ("%s.%s" % (ch["token"], khash))
+
+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")
+
+## http-01 challenge
+
class htconfig(object):
def __init__(self):
self.roots = {}
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
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")
-
-class maybeopen(object):
- def __init__(self, name, mode):
- if name == "-":
- self.opened = False
- if mode == "r":
- self.fp = sys.stdin
- elif mode == "w":
- self.fp = sys.stdout
- else:
- raise ValueError(mode)
- else:
- self.opened = True
- self.fp = open(name, mode)
-
- def __enter__(self):
- return self.fp
-
- def __exit__(self, *excinfo):
- if self.opened:
- self.fp.close()
- return False
+### Invocation and commands
invdata = threading.local()
commands = {}
def report(self, out):
out.write("%s\n" % (self.cmd.__doc__,))
+## User commands
+
def cmd_reg(args):
"usage: acmecert reg [OUTPUT-FILE]"
acct = register()
pprint.pprint(directory())
commands["directory"] = cmd_directory
+## Main invocation
+
def usage(out):
out.write("usage: acmecert [-D SERVICE] COMMAND [ARGS...]\n")
out.write(" acmecert -h [COMMAND]\n")
Dolda2000 GitWeb / utils.git / blobdiff