commit f004dff9ef8d0c6b3c6a29cb79a78a1bd56a5ff4
parent 7f67b36a19736ade7d1bc3dd6e142fcf95a9fb20
Author: ThomasV <thomasv@gitorious>
Date: Mon, 5 May 2014 17:31:39 +0200
adding initial bip70 script (wozz)
Diffstat:
2 files changed, 254 insertions(+), 0 deletions(-)
diff --git a/lib/paymentrequest.proto b/lib/paymentrequest.proto
@@ -0,0 +1,46 @@
+//
+// Simple Bitcoin Payment Protocol messages
+//
+// Use fields 1000+ for extensions;
+// to avoid conflicts, register extensions via pull-req at
+// https://github.com/bitcoin/bips/bip-0070/extensions.mediawiki
+//
+
+package payments;
+option java_package = "org.bitcoin.protocols.payments";
+option java_outer_classname = "Protos";
+
+// Generalized form of "send payment to this/these bitcoin addresses"
+message Output {
+ optional uint64 amount = 1 [default = 0]; // amount is integer-number-of-satoshis
+ required bytes script = 2; // usually one of the standard Script forms
+}
+message PaymentDetails {
+ optional string network = 1 [default = "main"]; // "main" or "test"
+ repeated Output outputs = 2; // Where payment should be sent
+ required uint64 time = 3; // Timestamp; when payment request created
+ optional uint64 expires = 4; // Timestamp; when this request should be considered invalid
+ optional string memo = 5; // Human-readable description of request for the customer
+ optional string payment_url = 6; // URL to send Payment and get PaymentACK
+ optional bytes merchant_data = 7; // Arbitrary data to include in the Payment message
+}
+message PaymentRequest {
+ optional uint32 payment_details_version = 1 [default = 1];
+ optional string pki_type = 2 [default = "none"]; // none / x509+sha256 / x509+sha1
+ optional bytes pki_data = 3; // depends on pki_type
+ required bytes serialized_payment_details = 4; // PaymentDetails
+ optional bytes signature = 5; // pki-dependent signature
+}
+message X509Certificates {
+ repeated bytes certificate = 1; // DER-encoded X.509 certificate chain
+}
+message Payment {
+ optional bytes merchant_data = 1; // From PaymentDetails.merchant_data
+ repeated bytes transactions = 2; // Signed transactions that satisfy PaymentDetails.outputs
+ repeated Output refund_to = 3; // Where to send refunds, if a refund is necessary
+ optional string memo = 4; // Human-readable message for the merchant
+}
+message PaymentACK {
+ required Payment payment = 1; // Payment message that triggered this ACK
+ optional string memo = 2; // human-readable message for customer
+}
diff --git a/lib/paymentrequest.py b/lib/paymentrequest.py
@@ -0,0 +1,208 @@
+import hashlib
+import httplib
+import os.path
+import re
+import sys
+import threading
+import time
+import traceback
+import urllib2
+
+try:
+ import paymentrequest_pb2
+except:
+ print "protoc --proto_path=lib/ --python_out=lib/ lib/paymentrequest.proto"
+ sys.exit(1)
+
+import urlparse
+import requests
+from M2Crypto import X509
+
+from bitcoin import is_valid
+import urlparse
+
+import transaction
+
+REQUEST_HEADERS = {'Accept': 'application/bitcoin-paymentrequest', 'User-Agent': 'Electrum'}
+ACK_HEADERS = {'Content-Type':'application/bitcoin-payment','Accept':'application/bitcoin-paymentack','User-Agent':'Electrum'}
+
+class PaymentRequest:
+
+ def __init__(self):
+ self.ca_path = os.path.expanduser("~/.electrum/ca/ca-bundle.crt")
+ self.ca_list = {}
+ try:
+ with open(self.ca_path, 'r') as ca_f:
+ c = ""
+ for line in ca_f:
+ if line == "-----BEGIN CERTIFICATE-----\n":
+ c = line
+ else:
+ c += line
+ if line == "-----END CERTIFICATE-----\n":
+ x = X509.load_cert_string(c)
+ self.ca_list[x.get_fingerprint()] = x
+ except Exception:
+ print "ERROR: Could not open %s"%self.ca_path
+ print "ca-bundle.crt file should be placed in ~/.electrum/ca/ca-bundle.crt"
+ print "Documentation on how to download or create the file here: http://curl.haxx.se/docs/caextract.html"
+ print "Payment will continue with manual verification."
+
+
+
+ def verify(self, url):
+
+ u = urlparse.urlparse(urllib2.unquote(url))
+ self.domain = u.netloc
+
+ 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()
+
+ r = resp.read()
+ paymntreq = paymentrequest_pb2.PaymentRequest()
+ paymntreq.ParseFromString(r)
+
+ sig = paymntreq.signature
+
+ 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:
+ ###TODO: check for subject alt names
+ ### check for wildcards
+ print "ERROR: Certificate Subject Domain Mismatch"
+ print self.domain, x509_1.get_subject().CN
+ #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:
+ print "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:
+ print "ERROR: Certificate not Signed by Provided CA Certificate Chain"
+ return
+ else:
+ if x509[i-1].verify(x509[i].get_pubkey()) != 1:
+ print "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 = self.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:
+ print "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:
+ print "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:
+ print "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()):
+ print "ERROR: Payment Request has Expired."
+ return False
+
+ self.outputs = []
+ for o in pay_det.outputs:
+ addr = transaction.get_address_from_output_script(o.script)[1]
+ self.outputs.append( (addr, o.amount) )
+
+ if CA_match:
+ print 'Signed By Trusted CA: ', CA_OU
+
+ return True
+
+
+
+ def send_ack(self, raw_tx, refund_addr):
+
+ pay_det = self.payment_details
+ if pay_det.payment_url:
+ paymnt = paymentrequest_pb2.Payment()
+
+ paymnt.merchant_data = pay_det.merchant_data
+ paymnt.transactions.append(raw_tx)
+
+ ref_out = paymnt.refund_to.add()
+ ref_out.script = transaction.Transaction.pay_script(refund_addr)
+ paymnt.memo = "Paid using Electrum"
+ pm = paymnt.SerializeToString()
+
+ payurl = urlparse.urlparse(pay_det.payment_url)
+ try:
+ r = requests.post(payurl.geturl(), data=pm, headers=ACK_HEADERS, verify=self.ca_path)
+ except requests.exceptions.SSLError:
+ print "Payment Message/PaymentACK verify Failed"
+ try:
+ r = requests.post(payurl.geturl(), data=pm, headers=ACK_HEADERS, verify=False)
+ except Exception as e:
+ print "Payment Message/PaymentACK Failed"
+ print e
+ return
+ try:
+ paymntack = paymentrequest_pb2.PaymentACK()
+ paymntack.ParseFromString(r.content)
+ print "PaymentACK message received: %s" % paymntack.memo
+ except Exception:
+ print "PaymentACK could not be processed. Payment was sent; please manually verify that payment was received."
+
+
+uri = "bitcoin:mpu3yTLdqA1BgGtFUwkVJmhnU3q5afaFkf?r=https%3A%2F%2Fbitcoincore.org%2F%7Egavin%2Ff.php%3Fh%3D26c19879d44c3891214e7897797b9160&amount=1"
+url = "https%3A%2F%2Fbitcoincore.org%2F%7Egavin%2Ff.php%3Fh%3D26c19879d44c3891214e7897797b9160"
+
+#uri = "bitcoin:1m9Lw2pFCe6Hs7xUuo9fMJCzEwQNdCo5e?amount=0.0012&r=https%3A%2F%2Fbitpay.com%2Fi%2F8XNDiQU92H2whNG4j8hZ5M"
+#url = "https%3A%2F%2Fbitpay.com%2Fi%2F8XNDiQU92H2whNG4j8hZ5M"
+
+
+if __name__ == "__main__":
+
+ pr = PaymentRequest()
+ if not pr.verify(url):
+ sys.exit(1)
+
+ print 'Payment Request Verified Domain: ', pr.domain
+ print 'outputs', pr.outputs
+ print 'Payment Memo: ', pr.payment_details.memo
+
+ tx = "blah"
+ pr.send_ack(tx, "1vXAXUnGitimzinpXrqDWVU4tyAAQ34RA")
+
