+#!/usr/bin/env python
+#
+# Electrum - lightweight Bitcoin client
+# Copyright (C) 2014 Thomas Voegtlin
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
import hashlib
import httplib
import os.path
import bitcoin
import util
import transaction
+import x509
REQUEST_HEADERS = {'Accept': 'application/bitcoin-paymentrequest', 'User-Agent': 'Electrum'}
ca_list = {}
+
+
+
def load_certificates():
- try:
- from M2Crypto import X509
- except:
- print_error("ERROR: Could not import M2Crypto")
- return False
ca_path = os.path.expanduser("~/.electrum/ca/ca-bundle.crt")
try:
else:
c += line
if line == "-----END CERTIFICATE-----\n":
- x = X509.load_cert_string(c)
- ca_list[x.get_fingerprint()] = x
+ x = x509.X509()
+ try:
+ x.parse(c)
+ except Exception as e:
+ print "cannot parse cert:", e
+ ca_list[x.getFingerprint()] = x
ca_f.close()
+ util.print_error("%d certificates"%len(ca_list))
return True
load_certificates()
+
class PaymentRequest:
def __init__(self, config):
self.config = config
def verify(self):
- try:
- from M2Crypto import X509
- except:
- self.error = "cannot import M2Crypto"
- return False
if not ca_list:
self.error = "Trusted certificate authorities list not found"
return False
paymntreq = self.data
- sig = paymntreq.signature
- if not sig:
+ if not paymntreq.signature:
self.error = "No signature"
return
cert.ParseFromString(paymntreq.pki_data)
cert_num = len(cert.certificate)
- x509_1 = X509.load_cert_der_string(cert.certificate[0])
- if self.domain != x509_1.get_subject().CN:
- validcert = False
- try:
- SANs = x509_1.get_ext("subjectAltName").get_value().split(",")
- for s in SANs:
- s = s.strip()
- if s.startswith("DNS:") and s[4:] == self.domain:
- validcert = True
- print "Match SAN DNS"
- elif s.startswith("IP:") and s[3:] == self.domain:
- validcert = True
- print "Match SAN IP"
- elif s.startswith("email:") and s[6:] == self.domain:
- validcert = True
- print "Match SAN email"
- except Exception, e:
- print "ERROR: No SAN data"
- if not validcert:
- ###TODO: check for wildcards
- self.error = "ERROR: Certificate Subject Domain Mismatch and SAN Mismatch"
- return
-
- x509 = []
- CA_OU = ''
-
- if cert_num > 1:
- for i in range(cert_num - 1):
- x509.append(X509.load_cert_der_string(cert.certificate[i+1]))
- if x509[i].check_ca() == 0:
+ x509_chain = []
+ for i in range(cert_num):
+ x = x509.X509()
+ x.parseBinary(bytearray(cert.certificate[i]))
+ x.slow_parse()
+ x509_chain.append(x)
+ if i == 0:
+ if not x.check_name(self.domain):
+ self.error = "Certificate Domain Mismatch"
+ return
+ else:
+ if not x.check_ca():
self.error = "ERROR: Supplied CA Certificate Error"
return
- for i in range(cert_num - 1):
- if i == 0:
- if x509_1.verify(x509[i].get_pubkey()) != 1:
- self.error = "ERROR: Certificate not Signed by Provided CA Certificate Chain"
- return
- else:
- if x509[i-1].verify(x509[i].get_pubkey()) != 1:
- self.error = "ERROR: CA Certificate not Signed by Provided CA Certificate Chain"
- return
-
- supplied_CA_fingerprint = x509[cert_num-2].get_fingerprint()
- supplied_CA_CN = x509[cert_num-2].get_subject().CN
- CA_match = False
- x = ca_list.get(supplied_CA_fingerprint)
- if x:
- CA_OU = x.get_subject().OU
- CA_match = True
- if x.get_subject().CN != supplied_CA_CN:
- print "ERROR: Trusted CA CN Mismatch; however CA has trusted fingerprint"
- print "Payment will continue with manual verification."
- else:
- print "ERROR: Supplied CA Not Found in Trusted CA Store."
- print "Payment will continue with manual verification."
- else:
+ if not cert_num > 1:
self.error = "ERROR: CA Certificate Chain Not Provided by Payment Processor"
return False
+ for i in range(1, cert_num):
+ x = x509_chain[i]
+ prev_x = x509_chain[i-1]
+
+ algo, sig, data = prev_x.extract_sig()
+ if algo.getComponentByName('algorithm') != x509.ALGO_RSA_SHA1:
+ self.error = "Algorithm not suported"
+ return
+
+ sig = bytearray(sig[5:])
+ pubkey = x.publicKey
+ verify = pubkey.hashAndVerify(sig, data)
+ if not verify:
+ self.error = "Certificate not Signed by Provided CA Certificate Chain"
+ return
+
+ ca = x509_chain[cert_num-1]
+ supplied_CA_fingerprint = ca.getFingerprint()
+ supplied_CA_names = ca.extract_names()
+ CA_OU = supplied_CA_names['OU']
+
+ x = ca_list.get(supplied_CA_fingerprint)
+ if x:
+ x.slow_parse()
+ names = x.extract_names()
+ CA_match = True
+ if names['CN'] != supplied_CA_names['CN']:
+ print "ERROR: Trusted CA CN Mismatch; however CA has trusted fingerprint"
+ print "Payment will continue with manual verification."
+ else:
+ CA_match = False
+
+ pubkey0 = x509_chain[0].publicKey
+ sig = paymntreq.signature
paymntreq.signature = ''
s = paymntreq.SerializeToString()
- pubkey_1 = x509_1.get_pubkey()
+ sigBytes = bytearray(sig)
+ msgBytes = bytearray(s)
if paymntreq.pki_type == "x509+sha256":
- pubkey_1.reset_context(md="sha256")
+ hashBytes = bytearray(hashlib.sha256(msgBytes).digest())
+ prefixBytes = bytearray([0x30,0x31,0x30,0x0d,0x06,0x09,0x60,0x86,0x48,0x01,0x65,0x03,0x04,0x02,0x01,0x05,0x00,0x04,0x20])
+ verify = pubkey0.verify(sigBytes, prefixBytes + hashBytes)
elif paymntreq.pki_type == "x509+sha1":
- pubkey_1.reset_context(md="sha1")
+ verify = pubkey0.hashAndVerify(sigBytes, msgBytes)
else:
self.error = "ERROR: Unsupported PKI Type for Message Signature"
return False
- pubkey_1.verify_init()
- pubkey_1.verify_update(s)
- if pubkey_1.verify_final(sig) != 1:
+ if not verify:
self.error = "ERROR: Invalid Signature for Payment Request Data"
return False
### SIG Verified
-
self.details = pay_det = paymentrequest_pb2.PaymentDetails()
self.details.ParseFromString(paymntreq.serialized_payment_details)
if CA_match:
self.status = 'Signed by Trusted CA:\n' + CA_OU
+ else:
+ self.status = "Supplied CA Not Found in Trusted CA Store."
self.payment_url = self.details.payment_url
git://git.novaco.in / electrum-nvc.git / blobdiff