5823920433004544

Committed 25 Mar 2025 03:50PM UTC coverage: 61.075% (-0.001%) from 61.076%

Build # 5823920433004544

Build Type

push

CirrusCI

Committed by

accumulator

Commit Message

small fixes, imports, whitespace

Coverage Stats

2 of 2 new or added lines in 1 file covered. (100.0%)

1 existing line in 1 file now uncovered.

21350 of 34957 relevant lines covered (61.08%)

3.05 hits per line

Source File
Press 'n' to go to next uncovered line, 'b' for previous

14.4

/electrum/paymentrequest.py

#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2014 Thomas Voegtlin
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import hashlib
import sys
import time
from typing import Optional, List, TYPE_CHECKING
import asyncio
import urllib.parse

import certifi
import aiohttp
import electrum_ecc as ecc


try:
    from . import paymentrequest_pb2 as pb2
except ImportError:
    sys.exit("Error: could not find paymentrequest_pb2.py. Create it with 'contrib/generate_payreqpb2.sh'")

from . import bitcoin, constants, util, transaction, x509, rsakey
from .util import bfh, make_aiohttp_session, error_text_bytes_to_safe_str, get_running_loop
from .invoices import Invoice, get_id_from_onchain_outputs
from .bitcoin import address_to_script
from .transaction import PartialTxOutput
from .network import Network
from .logging import get_logger
from .contacts import Contacts

if TYPE_CHECKING:
    from .simple_config import SimpleConfig


_logger = get_logger(__name__)


REQUEST_HEADERS = {'Accept': 'application/bitcoin-paymentrequest', 'User-Agent': 'Electrum'}
ACK_HEADERS = {'Content-Type': 'application/bitcoin-payment', 'Accept': 'application/bitcoin-paymentack', 'User-Agent': 'Electrum'}

ca_path = certifi.where()
ca_list = None
ca_keyID = None


def load_ca_list():
    global ca_list, ca_keyID
    if ca_list is None:
        ca_list, ca_keyID = x509.load_certificates(ca_path)


async def get_payment_request(url: str) -> 'PaymentRequest':
    u = urllib.parse.urlparse(url)
    error = None
    if u.scheme in ('http', 'https'):
        resp_content = None
        try:
            proxy = Network.get_instance().proxy
            async with make_aiohttp_session(proxy, headers=REQUEST_HEADERS) as session:
                async with session.get(url) as response:
                    resp_content = await response.read()
                    response.raise_for_status()
                    # Guard against `bitcoin:`-URIs with invalid payment request URLs
                    if "Content-Type" not in response.headers \
                    or response.headers["Content-Type"] != "application/bitcoin-paymentrequest":
                        data = None
                        error = "payment URL not pointing to a payment request handling server"
                    else:
                        data = resp_content
                    data_len = len(data) if data is not None else None
                    _logger.info(f'fetched payment request {url} {data_len}')
        except (aiohttp.ClientError, asyncio.TimeoutError) as e:
            error = f"Error while contacting payment URL: {url}.\nerror type: {type(e)}"
            if isinstance(e, aiohttp.ClientResponseError):
                error += f"\nGot HTTP status code {e.status}."
                if resp_content:
                    error_text_received = error_text_bytes_to_safe_str(resp_content)
                    error_text_received = error_text_received[:400]
                    error_oneline = ' -- '.join(error.split('\n'))
                    _logger.info(f"{error_oneline} -- [DO NOT TRUST THIS MESSAGE] "
                                 f"{repr(e)} text: {error_text_received}")
            data = None
    else:
        data = None
        error = f"Unknown scheme for payment request. URL: {url}"
    pr = PaymentRequest(data, error=error)
    loop = get_running_loop()
    # do x509/dnssec verification now (in separate thread, to avoid blocking event loop).
    # we still expect the caller to at least check pr.error!
    await loop.run_in_executor(None, pr.verify)
    return pr


class PaymentRequest:

    def __init__(self, data: bytes, *, error=None):
        self.raw = data
        self.error = error  # type: Optional[str]
        self._verified_success = None  # caches result of _verify
        self._verified_success_msg = None  # type: Optional[str]
        self._parse(data)
        self.requestor = None # known after verify
        self.tx = None

    def __str__(self):
        return str(self.raw)

    def _parse(self, r: bytes):
        self.outputs = []  # type: List[PartialTxOutput]
        if self.error:
            return
        try:
            self.data = pb2.PaymentRequest()
            self.data.ParseFromString(r)
        except Exception:
            self.error = "cannot parse payment request"
            return
        self.details = pb2.PaymentDetails()
        self.details.ParseFromString(self.data.serialized_payment_details)
        pr_network = self.details.network
        client_network = 'test' if constants.net.TESTNET else 'main'
        if pr_network != client_network:
            self.error = (f'Payment request network "{pr_network}" does not'
                          f' match client network "{client_network}".')
            return
        for o in self.details.outputs:
            addr = transaction.get_address_from_output_script(o.script)
            if not addr:
                # TODO maybe rm restriction but then get_requestor and get_id need changes
                self.error = "only addresses are allowed as outputs"
                return
            self.outputs.append(PartialTxOutput.from_address_and_value(addr, o.amount))
        self.memo = self.details.memo
        self.payment_url = self.details.payment_url

    def verify(self) -> bool:
        # FIXME: we should enforce that this method was called before we attempt payment
        # note: this method might do network requests (at least for verify_dnssec)
        if self._verified_success is True:
            return True
        if self.error:
            return False
        if not self.raw:
            self.error = "Empty request"
            return False
        pr = pb2.PaymentRequest()
        try:
            pr.ParseFromString(self.raw)
        except Exception:
            self.error = "Error: Cannot parse payment request"
            return False
        if not pr.signature:
            # the address will be displayed as requestor
            self.requestor = None
            return True
        if pr.pki_type in ["x509+sha256", "x509+sha1"]:
            return self.verify_x509(pr)
        elif pr.pki_type in ["dnssec+btc", "dnssec+ecdsa"]:
            return self.verify_dnssec(pr)
        else:
            self.error = "ERROR: Unsupported PKI Type for Message Signature"
            return False

    def verify_x509(self, paymntreq):
        load_ca_list()
        if not ca_list:
            self.error = "Trusted certificate authorities list not found"
            return False
        cert = pb2.X509Certificates()
        cert.ParseFromString(paymntreq.pki_data)
        # verify the chain of certificates
        try:
            x, ca = verify_cert_chain(cert.certificate)
        except BaseException as e:
            _logger.exception('')
            self.error = str(e)
            return False
        # get requestor name
        self.requestor = x.get_common_name()
        if self.requestor.startswith('*.'):
            self.requestor = self.requestor[2:]
        # verify the BIP70 signature
        pubkey0 = rsakey.RSAKey(x.modulus, x.exponent)
        sig = paymntreq.signature
        paymntreq.signature = b''
        s = paymntreq.SerializeToString()
        sigBytes = bytearray(sig)
        msgBytes = bytearray(s)
        if paymntreq.pki_type == "x509+sha256":
            hashBytes = bytearray(hashlib.sha256(msgBytes).digest())
            verify = pubkey0.verify(sigBytes, x509.PREFIX_RSA_SHA256 + hashBytes)
        elif paymntreq.pki_type == "x509+sha1":
            verify = pubkey0.hashAndVerify(sigBytes, msgBytes)
        else:
            self.error = f"ERROR: unknown pki_type {paymntreq.pki_type} in Payment Request"
            return False
        if not verify:
            self.error = "ERROR: Invalid Signature for Payment Request Data"
            return False
        ### SIG Verified
        self._verified_success_msg = 'Signed by Trusted CA: ' + ca.get_common_name()
        self._verified_success = True
        return True

    def verify_dnssec(self, pr):
        sig = pr.signature
        alias = pr.pki_data
        info = Contacts.resolve_openalias(alias)
        if info.get('validated') is not True:
            self.error = "Alias verification failed (DNSSEC)"
            return False
        if pr.pki_type == "dnssec+btc":
            self.requestor = alias
            address = info.get('address')
            pr.signature = b''
            message = pr.SerializeToString()
            if bitcoin.verify_usermessage_with_address(address, sig, message):
                self._verified_success_msg = 'Verified with DNSSEC'
                self._verified_success = True
                return True
            else:
                self.error = "verify failed"
                return False
        else:
            self.error = "unknown algo"
            return False

    def has_expired(self) -> Optional[bool]:
        if not hasattr(self, 'details'):
            return None
        return self.details.expires and self.details.expires < int(time.time())

    def get_time(self):
        return self.details.time

    def get_expiration_date(self):
        return self.details.expires

    def get_amount(self):
        return sum(map(lambda x:x.value, self.outputs))

    def get_address(self):
        o = self.outputs[0]
        addr = o.address
        assert addr
        return addr

    def get_requestor(self):
        return self.requestor if self.requestor else self.get_address()

    def get_verify_status(self) -> str:
        return (self.error or self._verified_success_msg) if self.requestor else "No Signature"

    def get_memo(self):
        return self.memo

    def get_name_for_export(self) -> Optional[str]:
        if not hasattr(self, 'details'):
            return None
        return get_id_from_onchain_outputs(self.outputs, timestamp=self.get_time())

    def get_outputs(self):
        return self.outputs[:]

    async def send_payment_and_receive_paymentack(self, raw_tx, refund_addr):
        pay_det = self.details
        if not self.details.payment_url:
            return False, "no url"
        paymnt = pb2.Payment()
        paymnt.merchant_data = pay_det.merchant_data
        paymnt.transactions.append(bfh(raw_tx))
        ref_out = paymnt.refund_to.add()
        ref_out.script = address_to_script(refund_addr)
        paymnt.memo = "Paid using Electrum"
        pm = paymnt.SerializeToString()
        payurl = urllib.parse.urlparse(pay_det.payment_url)
        resp_content = None
        try:
            proxy = Network.get_instance().proxy
            async with make_aiohttp_session(proxy, headers=ACK_HEADERS) as session:
                async with session.post(payurl.geturl(), data=pm) as response:
                    resp_content = await response.read()
                    response.raise_for_status()
                    try:
                        paymntack = pb2.PaymentACK()
                        paymntack.ParseFromString(resp_content)
                    except Exception:
                        return False, "PaymentACK could not be processed. Payment was sent; please manually verify that payment was received."
                    print(f"PaymentACK message received: {paymntack.memo}")
                    return True, paymntack.memo
        except aiohttp.ClientError as e:
            error = f"Payment Message/PaymentACK Failed:\nerror type: {type(e)}"
            if isinstance(e, aiohttp.ClientResponseError):
                error += f"\nGot HTTP status code {e.status}."
                if resp_content:
                    error_text_received = error_text_bytes_to_safe_str(resp_content)
                    error_text_received = error_text_received[:400]
                    error_oneline = ' -- '.join(error.split('\n'))
                    _logger.info(f"{error_oneline} -- [DO NOT TRUST THIS MESSAGE] "
                                 f"{repr(e)} text: {error_text_received}")
            return False, error


def make_unsigned_request(req: 'Invoice'):
    addr = req.get_address()
    time = req.time
    exp = req.exp
    if time and type(time) != int:
        time = 0
    if exp and type(exp) != int:
        exp = 0
    amount = req.get_amount_sat()
    if amount is None:
        amount = 0
    memo = req.message
    script = address_to_script(addr)
    outputs = [(script, amount)]
    pd = pb2.PaymentDetails()
    if constants.net.TESTNET:
        pd.network = 'test'
    for script, amount in outputs:
        pd.outputs.add(amount=amount, script=script)
    pd.time = time
    pd.expires = time + exp if exp else 0
    pd.memo = memo
    pr = pb2.PaymentRequest()
    pr.serialized_payment_details = pd.SerializeToString()
    pr.signature = util.to_bytes('')
    return pr


def sign_request_with_alias(pr, alias, alias_privkey):
    pr.pki_type = 'dnssec+btc'
    pr.pki_data = str(alias)
    message = pr.SerializeToString()
    ec_key = ecc.ECPrivkey(alias_privkey)
    compressed = bitcoin.is_compressed_privkey(alias_privkey)
    pr.signature = bitcoin.ecdsa_sign_usermessage(ec_key, message, is_compressed=compressed)


def verify_cert_chain(chain):
    """ Verify a chain of certificates. The last certificate is the CA"""
    load_ca_list()
    # parse the chain
    cert_num = len(chain)
    x509_chain = []
    for i in range(cert_num):
        x = x509.X509(bytearray(chain[i]))
        x509_chain.append(x)
        if i == 0:
            x.check_date()
        else:
            if not x.check_ca():
                raise Exception("ERROR: Supplied CA Certificate Error")
    if not cert_num > 1:
        raise Exception("ERROR: CA Certificate Chain Not Provided by Payment Processor")
    # if the root CA is not supplied, add it to the chain
    ca = x509_chain[cert_num-1]
    if ca.getFingerprint() not in ca_list:
        keyID = ca.get_issuer_keyID()
        f = ca_keyID.get(keyID)
        if f:
            root = ca_list[f]
            x509_chain.append(root)
        else:
            raise Exception("Supplied CA Not Found in Trusted CA Store.")
    # verify the chain of signatures
    cert_num = len(x509_chain)
    for i in range(1, cert_num):
        x = x509_chain[i]
        prev_x = x509_chain[i-1]
        algo, sig, data = prev_x.get_signature()
        sig = bytearray(sig)
        pubkey = rsakey.RSAKey(x.modulus, x.exponent)
        if algo == x509.ALGO_RSA_SHA1:
            verify = pubkey.hashAndVerify(sig, data)
        elif algo == x509.ALGO_RSA_SHA256:
            hashBytes = bytearray(hashlib.sha256(data).digest())
            verify = pubkey.verify(sig, x509.PREFIX_RSA_SHA256 + hashBytes)
        elif algo == x509.ALGO_RSA_SHA384:
            hashBytes = bytearray(hashlib.sha384(data).digest())
            verify = pubkey.verify(sig, x509.PREFIX_RSA_SHA384 + hashBytes)
        elif algo == x509.ALGO_RSA_SHA512:
            hashBytes = bytearray(hashlib.sha512(data).digest())
            verify = pubkey.verify(sig, x509.PREFIX_RSA_SHA512 + hashBytes)
        else:
            raise Exception("Algorithm not supported: {}".format(algo))
        if not verify:
            raise Exception("Certificate not Signed by Provided CA Certificate Chain")

    return x509_chain[0], ca


def check_ssl_config(config: 'SimpleConfig'):
    from . import pem
    key_path = config.SSL_KEYFILE_PATH
    cert_path = config.SSL_CERTFILE_PATH
    with open(key_path, 'r', encoding='utf-8') as f:
        params = pem.parse_private_key(f.read())
    with open(cert_path, 'r', encoding='utf-8') as f:
        s = f.read()
    bList = pem.dePemList(s, "CERTIFICATE")
    # verify chain
    x, ca = verify_cert_chain(bList)
    # verify that privkey and pubkey match
    privkey = rsakey.RSAKey(*params)
    pubkey = rsakey.RSAKey(x.modulus, x.exponent)
    assert x.modulus == params[0]
    assert x.exponent == params[1]
    # return requestor
    requestor = x.get_common_name()
    if requestor.startswith('*.'):
        requestor = requestor[2:]
    return requestor


def sign_request_with_x509(pr, key_path, cert_path):
    from . import pem
    with open(key_path, 'r', encoding='utf-8') as f:
        params = pem.parse_private_key(f.read())
        privkey = rsakey.RSAKey(*params)
    with open(cert_path, 'r', encoding='utf-8') as f:
        s = f.read()
        bList = pem.dePemList(s, "CERTIFICATE")
    certificates = pb2.X509Certificates()
    certificates.certificate.extend(map(bytes, bList))
    pr.pki_type = 'x509+sha256'
    pr.pki_data = certificates.SerializeToString()
    msgBytes = bytearray(pr.SerializeToString())
    hashBytes = bytearray(hashlib.sha256(msgBytes).digest())
    sig = privkey.sign(x509.PREFIX_RSA_SHA256 + hashBytes)
    pr.signature = bytes(sig)


def serialize_request(req):  # FIXME this is broken
    pr = make_unsigned_request(req)
    signature = req.get('sig')
    requestor = req.get('name')
    if requestor and signature:
        pr.signature = bfh(signature)
        pr.pki_type = 'dnssec+btc'
        pr.pki_data = str(requestor)
    return pr


def make_request(config: 'SimpleConfig', req: 'Invoice'):
    pr = make_unsigned_request(req)
    key_path = config.SSL_KEYFILE_PATH
    cert_path = config.SSL_CERTFILE_PATH
    if key_path and cert_path:
        sign_request_with_x509(pr, key_path, cert_path)
    return pr

1	#!/usr/bin/env python
2	#
3	# Electrum - lightweight Bitcoin client
4	# Copyright (C) 2014 Thomas Voegtlin
5	#
6	# Permission is hereby granted, free of charge, to any person
7	# obtaining a copy of this software and associated documentation files
8	# (the "Software"), to deal in the Software without restriction,
9	# including without limitation the rights to use, copy, modify, merge,
10	# publish, distribute, sublicense, and/or sell copies of the Software,
11	# and to permit persons to whom the Software is furnished to do so,
12	# subject to the following conditions:
13	#
14	# The above copyright notice and this permission notice shall be
15	# included in all copies or substantial portions of the Software.
16	#
17	# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18	# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19	# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20	# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
21	# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
22	# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23	# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24	# SOFTWARE.
25	import hashlib	5✔
26	import sys	5✔
27	import time	5✔
28	from typing import Optional, List, TYPE_CHECKING	5✔
29	import asyncio	5✔
30	import urllib.parse	5✔
31
32	import certifi	5✔
33	import aiohttp	5✔
34	import electrum_ecc as ecc	5✔
35
36
37	try:	5✔
38	from . import paymentrequest_pb2 as pb2	5✔
39	except ImportError:	×
40	sys.exit("Error: could not find paymentrequest_pb2.py. Create it with 'contrib/generate_payreqpb2.sh'")	×
41
42	from . import bitcoin, constants, util, transaction, x509, rsakey	5✔
43	from .util import bfh, make_aiohttp_session, error_text_bytes_to_safe_str, get_running_loop	5✔
44	from .invoices import Invoice, get_id_from_onchain_outputs	5✔
45	from .bitcoin import address_to_script	5✔
46	from .transaction import PartialTxOutput	5✔
47	from .network import Network	5✔
48	from .logging import get_logger	5✔
49	from .contacts import Contacts	5✔
50
51	if TYPE_CHECKING:	5✔
52	from .simple_config import SimpleConfig	×
53
54
55	_logger = get_logger(__name__)	5✔
56
57
58	REQUEST_HEADERS = {'Accept': 'application/bitcoin-paymentrequest', 'User-Agent': 'Electrum'}	5✔
59	ACK_HEADERS = {'Content-Type': 'application/bitcoin-payment', 'Accept': 'application/bitcoin-paymentack', 'User-Agent': 'Electrum'}	5✔
60
61	ca_path = certifi.where()	5✔
62	ca_list = None	5✔
63	ca_keyID = None	5✔
64
65
66	def load_ca_list():	5✔
67	global ca_list, ca_keyID
68	if ca_list is None:	×
69	ca_list, ca_keyID = x509.load_certificates(ca_path)	×
70
71
72	async def get_payment_request(url: str) -> 'PaymentRequest':	5✔
UNCOV 73	u = urllib.parse.urlparse(url)	×
74	error = None	×
75	if u.scheme in ('http', 'https'):	×
76	resp_content = None	×
77	try:	×
78	proxy = Network.get_instance().proxy	×
79	async with make_aiohttp_session(proxy, headers=REQUEST_HEADERS) as session:	×
80	async with session.get(url) as response:	×
81	resp_content = await response.read()	×
82	response.raise_for_status()	×
83	# Guard against `bitcoin:`-URIs with invalid payment request URLs
84	if "Content-Type" not in response.headers \	×
85	or response.headers["Content-Type"] != "application/bitcoin-paymentrequest":
86	data = None	×
87	error = "payment URL not pointing to a payment request handling server"	×
88	else:
89	data = resp_content	×
90	data_len = len(data) if data is not None else None	×
91	_logger.info(f'fetched payment request {url} {data_len}')	×
92	except (aiohttp.ClientError, asyncio.TimeoutError) as e:	×
93	error = f"Error while contacting payment URL: {url}.\nerror type: {type(e)}"	×
94	if isinstance(e, aiohttp.ClientResponseError):	×
95	error += f"\nGot HTTP status code {e.status}."	×
96	if resp_content:	×
97	error_text_received = error_text_bytes_to_safe_str(resp_content)	×
98	error_text_received = error_text_received[:400]	×
99	error_oneline = ' -- '.join(error.split('\n'))	×
100	_logger.info(f"{error_oneline} -- [DO NOT TRUST THIS MESSAGE] "	×
101	f"{repr(e)} text: {error_text_received}")
102	data = None	×
103	else:
104	data = None	×
105	error = f"Unknown scheme for payment request. URL: {url}"	×
106	pr = PaymentRequest(data, error=error)	×
107	loop = get_running_loop()	×
108	# do x509/dnssec verification now (in separate thread, to avoid blocking event loop).
109	# we still expect the caller to at least check pr.error!
110	await loop.run_in_executor(None, pr.verify)	×
111	return pr	×
112
113
114	class PaymentRequest:	5✔
115
116	def __init__(self, data: bytes, *, error=None):	5✔
117	self.raw = data	×
118	self.error = error # type: Optional[str]	×
119	self._verified_success = None # caches result of _verify	×
120	self._verified_success_msg = None # type: Optional[str]	×
121	self._parse(data)	×
122	self.requestor = None # known after verify	×
123	self.tx = None	×
124
125	def __str__(self):	5✔
126	return str(self.raw)	×
127
128	def _parse(self, r: bytes):	5✔
129	self.outputs = [] # type: List[PartialTxOutput]	×
130	if self.error:	×
131	return	×
132	try:	×
133	self.data = pb2.PaymentRequest()	×
134	self.data.ParseFromString(r)	×
135	except Exception:	×
136	self.error = "cannot parse payment request"	×
137	return	×
138	self.details = pb2.PaymentDetails()	×
139	self.details.ParseFromString(self.data.serialized_payment_details)	×
140	pr_network = self.details.network	×
141	client_network = 'test' if constants.net.TESTNET else 'main'	×
142	if pr_network != client_network:	×
143	self.error = (f'Payment request network "{pr_network}" does not'	×
144	f' match client network "{client_network}".')
145	return	×
146	for o in self.details.outputs:	×
147	addr = transaction.get_address_from_output_script(o.script)	×
148	if not addr:	×
149	# TODO maybe rm restriction but then get_requestor and get_id need changes
150	self.error = "only addresses are allowed as outputs"	×
151	return	×
152	self.outputs.append(PartialTxOutput.from_address_and_value(addr, o.amount))	×
153	self.memo = self.details.memo	×
154	self.payment_url = self.details.payment_url	×
155
156	def verify(self) -> bool:	5✔
157	# FIXME: we should enforce that this method was called before we attempt payment
158	# note: this method might do network requests (at least for verify_dnssec)
159	if self._verified_success is True:	×
160	return True	×
161	if self.error:	×
162	return False	×
163	if not self.raw:	×
164	self.error = "Empty request"	×
165	return False	×
166	pr = pb2.PaymentRequest()	×
167	try:	×
168	pr.ParseFromString(self.raw)	×
169	except Exception:	×
170	self.error = "Error: Cannot parse payment request"	×
171	return False	×
172	if not pr.signature:	×
173	# the address will be displayed as requestor
174	self.requestor = None	×
175	return True	×
176	if pr.pki_type in ["x509+sha256", "x509+sha1"]:	×
177	return self.verify_x509(pr)	×
178	elif pr.pki_type in ["dnssec+btc", "dnssec+ecdsa"]:	×
179	return self.verify_dnssec(pr)	×
180	else:
181	self.error = "ERROR: Unsupported PKI Type for Message Signature"	×
182	return False	×
183
184	def verify_x509(self, paymntreq):	5✔
185	load_ca_list()	×
186	if not ca_list:	×
187	self.error = "Trusted certificate authorities list not found"	×
188	return False	×
189	cert = pb2.X509Certificates()	×
190	cert.ParseFromString(paymntreq.pki_data)	×
191	# verify the chain of certificates
192	try:	×
193	x, ca = verify_cert_chain(cert.certificate)	×
194	except BaseException as e:	×
195	_logger.exception('')	×
196	self.error = str(e)	×
197	return False	×
198	# get requestor name
199	self.requestor = x.get_common_name()	×
200	if self.requestor.startswith('*.'):	×
201	self.requestor = self.requestor[2:]	×
202	# verify the BIP70 signature
203	pubkey0 = rsakey.RSAKey(x.modulus, x.exponent)	×
204	sig = paymntreq.signature	×
205	paymntreq.signature = b''	×
206	s = paymntreq.SerializeToString()	×
207	sigBytes = bytearray(sig)	×
208	msgBytes = bytearray(s)	×
209	if paymntreq.pki_type == "x509+sha256":	×
210	hashBytes = bytearray(hashlib.sha256(msgBytes).digest())	×
211	verify = pubkey0.verify(sigBytes, x509.PREFIX_RSA_SHA256 + hashBytes)	×
212	elif paymntreq.pki_type == "x509+sha1":	×
213	verify = pubkey0.hashAndVerify(sigBytes, msgBytes)	×
214	else:
215	self.error = f"ERROR: unknown pki_type {paymntreq.pki_type} in Payment Request"	×
216	return False	×
217	if not verify:	×
218	self.error = "ERROR: Invalid Signature for Payment Request Data"	×
219	return False	×
220	### SIG Verified
221	self._verified_success_msg = 'Signed by Trusted CA: ' + ca.get_common_name()	×
222	self._verified_success = True	×
223	return True	×
224
225	def verify_dnssec(self, pr):	5✔
226	sig = pr.signature	×
227	alias = pr.pki_data	×
228	info = Contacts.resolve_openalias(alias)	×
229	if info.get('validated') is not True:	×
230	self.error = "Alias verification failed (DNSSEC)"	×
231	return False	×
232	if pr.pki_type == "dnssec+btc":	×
233	self.requestor = alias	×
234	address = info.get('address')	×
235	pr.signature = b''	×
236	message = pr.SerializeToString()	×
237	if bitcoin.verify_usermessage_with_address(address, sig, message):	×
238	self._verified_success_msg = 'Verified with DNSSEC'	×
239	self._verified_success = True	×
240	return True	×
241	else:
242	self.error = "verify failed"	×
243	return False	×
244	else:
245	self.error = "unknown algo"	×
246	return False	×
247
248	def has_expired(self) -> Optional[bool]:	5✔
249	if not hasattr(self, 'details'):	×
250	return None	×
251	return self.details.expires and self.details.expires < int(time.time())	×
252
253	def get_time(self):	5✔
254	return self.details.time	×
255
256	def get_expiration_date(self):	5✔
257	return self.details.expires	×
258
259	def get_amount(self):	5✔
260	return sum(map(lambda x:x.value, self.outputs))	×
261
262	def get_address(self):	5✔
263	o = self.outputs[0]	×
264	addr = o.address	×
265	assert addr	×
266	return addr	×
267
268	def get_requestor(self):	5✔
269	return self.requestor if self.requestor else self.get_address()	×
270
271	def get_verify_status(self) -> str:	5✔
272	return (self.error or self._verified_success_msg) if self.requestor else "No Signature"	×
273
274	def get_memo(self):	5✔
275	return self.memo	×
276
277	def get_name_for_export(self) -> Optional[str]:	5✔
278	if not hasattr(self, 'details'):	×
279	return None	×
280	return get_id_from_onchain_outputs(self.outputs, timestamp=self.get_time())	×
281
282	def get_outputs(self):	5✔
283	return self.outputs[:]	×
284
285	async def send_payment_and_receive_paymentack(self, raw_tx, refund_addr):	5✔
286	pay_det = self.details	×
287	if not self.details.payment_url:	×
288	return False, "no url"	×
289	paymnt = pb2.Payment()	×
290	paymnt.merchant_data = pay_det.merchant_data	×
291	paymnt.transactions.append(bfh(raw_tx))	×
292	ref_out = paymnt.refund_to.add()	×
293	ref_out.script = address_to_script(refund_addr)	×
294	paymnt.memo = "Paid using Electrum"	×
295	pm = paymnt.SerializeToString()	×
296	payurl = urllib.parse.urlparse(pay_det.payment_url)	×
297	resp_content = None	×
298	try:	×
299	proxy = Network.get_instance().proxy	×
300	async with make_aiohttp_session(proxy, headers=ACK_HEADERS) as session:	×
301	async with session.post(payurl.geturl(), data=pm) as response:	×
302	resp_content = await response.read()	×
303	response.raise_for_status()	×
304	try:	×
305	paymntack = pb2.PaymentACK()	×
306	paymntack.ParseFromString(resp_content)	×
307	except Exception:	×
308	return False, "PaymentACK could not be processed. Payment was sent; please manually verify that payment was received."	×
309	print(f"PaymentACK message received: {paymntack.memo}")	×
310	return True, paymntack.memo	×
311	except aiohttp.ClientError as e:	×
312	error = f"Payment Message/PaymentACK Failed:\nerror type: {type(e)}"	×
313	if isinstance(e, aiohttp.ClientResponseError):	×
314	error += f"\nGot HTTP status code {e.status}."	×
315	if resp_content:	×
316	error_text_received = error_text_bytes_to_safe_str(resp_content)	×
317	error_text_received = error_text_received[:400]	×
318	error_oneline = ' -- '.join(error.split('\n'))	×
319	_logger.info(f"{error_oneline} -- [DO NOT TRUST THIS MESSAGE] "	×
320	f"{repr(e)} text: {error_text_received}")
321	return False, error	×
322
323
324	def make_unsigned_request(req: 'Invoice'):	5✔
325	addr = req.get_address()	×
326	time = req.time	×
327	exp = req.exp	×
328	if time and type(time) != int:	×
329	time = 0	×
330	if exp and type(exp) != int:	×
331	exp = 0	×
332	amount = req.get_amount_sat()	×
333	if amount is None:	×
334	amount = 0	×
335	memo = req.message	×
336	script = address_to_script(addr)	×
337	outputs = [(script, amount)]	×
338	pd = pb2.PaymentDetails()	×
339	if constants.net.TESTNET:	×
340	pd.network = 'test'	×
341	for script, amount in outputs:	×
342	pd.outputs.add(amount=amount, script=script)	×
343	pd.time = time	×
344	pd.expires = time + exp if exp else 0	×
345	pd.memo = memo	×
346	pr = pb2.PaymentRequest()	×
347	pr.serialized_payment_details = pd.SerializeToString()	×
348	pr.signature = util.to_bytes('')	×
349	return pr	×
350
351
352	def sign_request_with_alias(pr, alias, alias_privkey):	5✔
353	pr.pki_type = 'dnssec+btc'	×
354	pr.pki_data = str(alias)	×
355	message = pr.SerializeToString()	×
356	ec_key = ecc.ECPrivkey(alias_privkey)	×
357	compressed = bitcoin.is_compressed_privkey(alias_privkey)	×
358	pr.signature = bitcoin.ecdsa_sign_usermessage(ec_key, message, is_compressed=compressed)	×
359
360
361	def verify_cert_chain(chain):	5✔
362	""" Verify a chain of certificates. The last certificate is the CA"""
363	load_ca_list()	×
364	# parse the chain
365	cert_num = len(chain)	×
366	x509_chain = []	×
367	for i in range(cert_num):	×
368	x = x509.X509(bytearray(chain[i]))	×
369	x509_chain.append(x)	×
370	if i == 0:	×
371	x.check_date()	×
372	else:
373	if not x.check_ca():	×
374	raise Exception("ERROR: Supplied CA Certificate Error")	×
375	if not cert_num > 1:	×
376	raise Exception("ERROR: CA Certificate Chain Not Provided by Payment Processor")	×
377	# if the root CA is not supplied, add it to the chain
378	ca = x509_chain[cert_num-1]	×
379	if ca.getFingerprint() not in ca_list:	×
380	keyID = ca.get_issuer_keyID()	×
381	f = ca_keyID.get(keyID)	×
382	if f:	×
383	root = ca_list[f]	×
384	x509_chain.append(root)	×
385	else:
386	raise Exception("Supplied CA Not Found in Trusted CA Store.")	×
387	# verify the chain of signatures
388	cert_num = len(x509_chain)	×
389	for i in range(1, cert_num):	×
390	x = x509_chain[i]	×
391	prev_x = x509_chain[i-1]	×
392	algo, sig, data = prev_x.get_signature()	×
393	sig = bytearray(sig)	×
394	pubkey = rsakey.RSAKey(x.modulus, x.exponent)	×
395	if algo == x509.ALGO_RSA_SHA1:	×
396	verify = pubkey.hashAndVerify(sig, data)	×
397	elif algo == x509.ALGO_RSA_SHA256:	×
398	hashBytes = bytearray(hashlib.sha256(data).digest())	×
399	verify = pubkey.verify(sig, x509.PREFIX_RSA_SHA256 + hashBytes)	×
400	elif algo == x509.ALGO_RSA_SHA384:	×
401	hashBytes = bytearray(hashlib.sha384(data).digest())	×
402	verify = pubkey.verify(sig, x509.PREFIX_RSA_SHA384 + hashBytes)	×
403	elif algo == x509.ALGO_RSA_SHA512:	×
404	hashBytes = bytearray(hashlib.sha512(data).digest())	×
405	verify = pubkey.verify(sig, x509.PREFIX_RSA_SHA512 + hashBytes)	×
406	else:
407	raise Exception("Algorithm not supported: {}".format(algo))	×
408	if not verify:	×
409	raise Exception("Certificate not Signed by Provided CA Certificate Chain")	×
410
411	return x509_chain[0], ca	×
412
413
414	def check_ssl_config(config: 'SimpleConfig'):	5✔
415	from . import pem	×
416	key_path = config.SSL_KEYFILE_PATH	×
417	cert_path = config.SSL_CERTFILE_PATH	×
418	with open(key_path, 'r', encoding='utf-8') as f:	×
419	params = pem.parse_private_key(f.read())	×
420	with open(cert_path, 'r', encoding='utf-8') as f:	×
421	s = f.read()	×
422	bList = pem.dePemList(s, "CERTIFICATE")	×
423	# verify chain
424	x, ca = verify_cert_chain(bList)	×
425	# verify that privkey and pubkey match
426	privkey = rsakey.RSAKey(*params)	×
427	pubkey = rsakey.RSAKey(x.modulus, x.exponent)	×
428	assert x.modulus == params[0]	×
429	assert x.exponent == params[1]	×
430	# return requestor
431	requestor = x.get_common_name()	×
432	if requestor.startswith('*.'):	×
433	requestor = requestor[2:]	×
434	return requestor	×
435
436
437	def sign_request_with_x509(pr, key_path, cert_path):	5✔
438	from . import pem	×
439	with open(key_path, 'r', encoding='utf-8') as f:	×
440	params = pem.parse_private_key(f.read())	×
441	privkey = rsakey.RSAKey(*params)	×
442	with open(cert_path, 'r', encoding='utf-8') as f:	×
443	s = f.read()	×
444	bList = pem.dePemList(s, "CERTIFICATE")	×
445	certificates = pb2.X509Certificates()	×
446	certificates.certificate.extend(map(bytes, bList))	×
447	pr.pki_type = 'x509+sha256'	×
448	pr.pki_data = certificates.SerializeToString()	×
449	msgBytes = bytearray(pr.SerializeToString())	×
450	hashBytes = bytearray(hashlib.sha256(msgBytes).digest())	×
451	sig = privkey.sign(x509.PREFIX_RSA_SHA256 + hashBytes)	×
452	pr.signature = bytes(sig)	×
453
454
455	def serialize_request(req): # FIXME this is broken	5✔
456	pr = make_unsigned_request(req)	×
457	signature = req.get('sig')	×
458	requestor = req.get('name')	×
459	if requestor and signature:	×
460	pr.signature = bfh(signature)	×
461	pr.pki_type = 'dnssec+btc'	×
462	pr.pki_data = str(requestor)	×
463	return pr	×
464
465
466	def make_request(config: 'SimpleConfig', req: 'Invoice'):	5✔
467	pr = make_unsigned_request(req)	×
468	key_path = config.SSL_KEYFILE_PATH	×
469	cert_path = config.SSL_CERTFILE_PATH	×
470	if key_path and cert_path:	×
471	sign_request_with_x509(pr, key_path, cert_path)	×
472	return pr	×

spesmilo / electrum / 5823920433004544

Source File Press 'n' to go to next uncovered line, 'b' for previous

Source File
Press 'n' to go to next uncovered line, 'b' for previous