From dde5d0f354334142d371edda6db2b6b985fb8e21 Mon Sep 17 00:00:00 2001
From: Rudolf Polzer <divverent@xonotic.org>
Date: Thu, 20 Oct 2011 21:48:58 +0200
Subject: [PATCH] python version of the module, first start

---
 misc/infrastructure/python/d0_blind_id.py | 91 +++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 misc/infrastructure/python/d0_blind_id.py

diff --git a/misc/infrastructure/python/d0_blind_id.py b/misc/infrastructure/python/d0_blind_id.py
new file mode 100644
index 00000000..4b2182a6
--- /dev/null
+++ b/misc/infrastructure/python/d0_blind_id.py
@@ -0,0 +1,91 @@
+import subprocess
+import os
+import fcntl
+import base64
+import select
+
+d0_blind_id_keygen = "./crypto-keygen-standalone"
+d0_blind_id_d0pk = "key_0.d0pk"
+
+def d0_blind_id_verify(sig, querystring, postdata=None): #-> (idfp, status)
+	data = None
+	if postdata == None:
+		data = querystring
+	else:
+		data = postdata + "\0" + querystring
+	if sig != None:
+		# make some pipes
+		(dpipe_r, dpipe_w) = os.pipe()
+		(spipe_r, spipe_w) = os.pipe()
+
+		# smoke them
+		def closepipes():
+			os.close(dpipe_w)
+			os.close(spipe_w)
+		checker = subprocess.Popen([d0_blind_id_keygen, "-p", d0_blind_id_d0pk, "-d", "/dev/fd/%d" % (dpipe_r, ), "-s", "/dev/fd/%d" % (spipe_r, )], stdout=subprocess.PIPE, preexec_fn=closepipes)
+
+		# close them
+		os.close(dpipe_r)
+		os.close(spipe_r)
+
+		# make them nonblocking
+		fcntl.fcntl(dpipe_w, fcntl.F_SETFL, fcntl.fcntl(dpipe_w, fcntl.F_GETFL) | os.O_NONBLOCK)
+		fcntl.fcntl(spipe_w, fcntl.F_SETFL, fcntl.fcntl(spipe_w, fcntl.F_GETFL) | os.O_NONBLOCK)
+
+		# fill vars
+		rpipes = [dpipe_w, spipe_w]
+		buffers = [data, base64.b64decode(sig)]
+
+		# generic nonblocking buffer loop
+		while len([p for p in rpipes if p != None]) != 0:
+			(readers, writers, errorers) = select.select([], [p for p in rpipes if p != None], [p for p in rpipes if p != None], None)
+			n = 0
+			for e in errorers:
+				i = [j for j in range(len(rpipes)) if rpipes[j] == e]
+				if len(i) != 1:
+					continue
+				i = i[0]
+				os.close(e)
+				buffers[i] = None
+				rpipes[i] = None
+				n += 1
+			for w in writers:
+				i = [j for j in range(len(rpipes)) if rpipes[j] == w]
+				if len(i) != 1:
+					continue
+				i = i[0]
+				written = os.write(w, buffers[i])
+				if written > 0:
+					buffers[i] = buffers[i][written:]
+				if buffers[i] == "":
+					os.close(w)
+					buffers[i] = None
+					rpipes[i] = None
+				n += 1
+			if not n:
+				break
+
+		# close all remaining
+		for p in rpipes:
+			if p != None:
+				os.close(p)
+
+		# check
+		if len([x for x in buffers if x != None]) != 0:
+			raise Exception("could not write data to process")
+
+		# retrieve data from stdout
+		status = checker.stdout.readline().rstrip("\n")
+		idfp = checker.stdout.readline().rstrip("\n")
+		checker.stdout.close()
+		checker.wait()
+		if checker.returncode != 0:
+			return (None, None)
+		return (idfp, int(status))
+
+if __name__ == "__main__":
+	sig = "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"
+	querystring = ""
+	postdata = "hello world"
+	(idfp, status) = d0_blind_id_verify(sig, querystring, postdata)
+	print(repr((idfp, status)))
-- 
2.39.2