python version of the module, first start

diff --git a/misc/infrastructure/python/d0_blind_id.py b/misc/infrastructure/python/d0_blind_id.py
new file mode 100644 (file)
index 0000000..4b2182a
--- /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)))