def parse(self, r):
try:
self.data = pb2.PaymentRequest()
self.data.ParseFromString(r)
except:
self.error = "cannot parse payment request"
return
self.details = pb2.PaymentDetails()
self.details.ParseFromString(self.data.serialized_payment_details)
for o in self.details.outputs:
addr = transaction.get_address_from_output_script(o.script)[1]
self.outputs.append(('address', addr, o.amount))
self.memo = self.details.memo
self.payment_url = self.details.payment_url
def parse(self, r):
self.id = bitcoin.sha256(r)[0:16].encode('hex')
try:
self.data = pb2.PaymentRequest()
self.data.ParseFromString(r)
except:
self.error = "cannot parse payment request"
return
self.details = pb2.PaymentDetails()
self.details.ParseFromString(self.data.serialized_payment_details)
self.outputs = []
for o in self.details.outputs:
addr = transaction.get_address_from_output_script(o.script)[1]
self.outputs.append((TYPE_ADDRESS, addr, o.amount))
self.memo = self.details.memo
self.payment_url = self.details.payment_url
def parse(self, r):
self.id = bitcoin.sha256(r)[0:16].encode('hex')
try:
self.data = pb2.PaymentRequest()
self.data.ParseFromString(r)
except:
self.error = "cannot parse payment request"
return
self.details = pb2.PaymentDetails()
self.details.ParseFromString(self.data.serialized_payment_details)
self.outputs = []
for o in self.details.outputs:
addr = transaction.get_address_from_output_script(o.script)[1]
self.outputs.append((TYPE_ADDRESS, addr, o.amount))
self.memo = self.details.memo
self.payment_url = self.details.payment_url
def verify(self):
if not ca_list:
self.error = "Trusted certificate authorities list not found"
return False
paymntreq = self.data
if not paymntreq.signature:
self.error = "No signature"
return
cert = paymentrequest_pb2.X509Certificates()
cert.ParseFromString(paymntreq.pki_data)
cert_num = len(cert.certificate)
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:
try:
x.check_date()
x.check_name(self.domain)
except Exception as e:
self.error = str(e)
return
else:
if not x.check_ca():
self.error = "ERROR: Supplied CA Certificate Error"
return
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()
sig = bytearray(sig[5:])
pubkey = x.publicKey
if algo.getComponentByName("algorithm") == x509.ALGO_RSA_SHA1:
verify = pubkey.hashAndVerify(sig, data)
elif algo.getComponentByName("algorithm") == x509.ALGO_RSA_SHA256:
hashBytes = bytearray(hashlib.sha256(data).digest())
prefixBytes = bytearray(
[
0x30,
0x31,
0x30,
0x0D,
0x06,
0x09,
0x60,
0x86,
0x48,
0x01,
0x65,
0x03,
0x04,
0x02,
0x01,
0x05,
0x00,
0x04,
0x20,
]
)
verify = pubkey.verify(sig, prefixBytes + hashBytes)
else:
self.error = "Algorithm not supported"
util.print_error(self.error, algo.getComponentByName("algorithm"))
return
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()
sigBytes = bytearray(sig)
msgBytes = bytearray(s)
if paymntreq.pki_type == "x509+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":
verify = pubkey0.hashAndVerify(sigBytes, msgBytes)
else:
self.error = "ERROR: Unsupported PKI Type for Message Signature"
return False
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)
for o in pay_det.outputs:
addr = transaction.get_address_from_output_script(o.script)[1]
self.outputs.append(("address", addr, o.amount))
self.memo = self.details.memo
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
return True
def verify(self):
if not ca_list:
self.error = "Trusted certificate authorities list not found"
return False
paymntreq = self.data
if not paymntreq.signature:
self.error = "No signature"
return
cert = paymentrequest_pb2.X509Certificates()
cert.ParseFromString(paymntreq.pki_data)
cert_num = len(cert.certificate)
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:
try:
x.check_date()
x.check_name(self.domain)
except Exception as e:
self.error = str(e)
return
else:
if not x.check_ca():
self.error = "ERROR: Supplied CA Certificate Error"
return
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()
sig = bytearray(sig[5:])
pubkey = x.publicKey
if algo.getComponentByName('algorithm') == x509.ALGO_RSA_SHA1:
verify = pubkey.hashAndVerify(sig, data)
elif algo.getComponentByName('algorithm') == x509.ALGO_RSA_SHA256:
hashBytes = bytearray(hashlib.sha256(data).digest())
prefixBytes = bytearray([
0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20
])
verify = pubkey.verify(sig, prefixBytes + hashBytes)
else:
self.error = "Algorithm not supported"
util.print_error(self.error,
algo.getComponentByName('algorithm'))
return
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()
sigBytes = bytearray(sig)
msgBytes = bytearray(s)
if paymntreq.pki_type == "x509+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":
verify = pubkey0.hashAndVerify(sigBytes, msgBytes)
else:
self.error = "ERROR: Unsupported PKI Type for Message Signature"
return False
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)
for o in pay_det.outputs:
addr = transaction.get_address_from_output_script(o.script)[1]
self.outputs.append(('address', addr, o.amount))
self.memo = self.details.memo
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
return True
class PaymentRequest:
def __init__(self, url):
self.url = url
self.outputs = []
self.error = ""
def get_amount(self):
return sum(map(lambda x: x[1], self.outputs))
def verify(self):
u = urlparse.urlparse(self.url)
self.domain = u.netloc
try:
connection = httplib.HTTPConnection(
u.netloc) if u.scheme == 'http' else httplib.HTTPSConnection(
u.netloc)
connection.request("GET", u.geturl(), headers=REQUEST_HEADERS)
resp = connection.getresponse()
except:
self.error = "cannot read url"
return
paymntreq = paymentrequest_pb2.PaymentRequest()
try:
r = resp.read()
paymntreq.ParseFromString(r)
except:
self.error = "cannot parse payment request"
return
sig = paymntreq.signature
if not sig:
self.error = "No signature"
return
cert = paymentrequest_pb2.X509Certificates()
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:
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:
self.error = "ERROR: CA Certificate Chain Not Provided by Payment Processor"
return False
paymntreq.signature = ''
s = paymntreq.SerializeToString()
pubkey_1 = x509_1.get_pubkey()
if paymntreq.pki_type == "x509+sha256":
pubkey_1.reset_context(md="sha256")
elif paymntreq.pki_type == "x509+sha1":
pubkey_1.reset_context(md="sha1")
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:
self.error = "ERROR: Invalid Signature for Payment Request Data"
return False
### SIG Verified
self.payment_details = pay_det = paymentrequest_pb2.PaymentDetails()
pay_det.ParseFromString(paymntreq.serialized_payment_details)
if pay_det.expires and pay_det.expires < int(time.time()):
self.error = "ERROR: Payment Request has Expired."
return False
for o in pay_det.outputs:
addr = transaction.get_address_from_output_script(o.script)[1]
self.outputs.append((addr, o.amount))
self.memo = pay_det.memo
if CA_match:
print 'Signed By Trusted CA: ', CA_OU
print "payment url", pay_det.payment_url
return True
class PaymentRequest:
def __init__(self, config):
self.config = config
self.outputs = []
self.error = ""
self.dir_path = os.path.join(self.config.path, 'requests')
if not os.path.exists(self.dir_path):
os.mkdir(self.dir_path)
def read(self, url):
self.url = url
u = urlparse.urlparse(url)
self.domain = u.netloc
try:
connection = httplib.HTTPConnection(
u.netloc) if u.scheme == 'http' else httplib.HTTPSConnection(
u.netloc)
connection.request("GET", u.geturl(), headers=REQUEST_HEADERS)
response = connection.getresponse()
except:
self.error = "cannot read url"
return
try:
r = response.read()
except:
self.error = "cannot read"
return
self.id = bitcoin.sha256(r)[0:16].encode('hex')
filename = os.path.join(self.dir_path, self.id)
with open(filename, 'w') as f:
f.write(r)
return self.parse(r)
def get_status(self):
if self.error:
return self.error
else:
return self.status
def read_file(self, key):
filename = os.path.join(self.dir_path, key)
with open(filename, 'r') as f:
r = f.read()
self.parse(r)
def parse(self, r):
try:
self.data = paymentrequest_pb2.PaymentRequest()
self.data.ParseFromString(r)
except:
self.error = "cannot parse payment request"
return
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:
self.error = "No signature"
return
cert = paymentrequest_pb2.X509Certificates()
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:
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:
self.error = "ERROR: CA Certificate Chain Not Provided by Payment Processor"
return False
paymntreq.signature = ''
s = paymntreq.SerializeToString()
pubkey_1 = x509_1.get_pubkey()
if paymntreq.pki_type == "x509+sha256":
pubkey_1.reset_context(md="sha256")
elif paymntreq.pki_type == "x509+sha1":
pubkey_1.reset_context(md="sha1")
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:
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)
for o in pay_det.outputs:
addr = transaction.get_address_from_output_script(o.script)[1]
self.outputs.append((addr, o.amount))
self.memo = self.details.memo
if CA_match:
self.status = 'Signed by Trusted CA:\n' + CA_OU
self.payment_url = self.details.payment_url
if self.has_expired():
self.error = "ERROR: Payment Request has Expired."
return False
return True