From ce8ba928172071dc89cc1fc0520f840211bbfa0d Mon Sep 17 00:00:00 2001
From: Rob Austein <sra@hactrn.net>
Date: Fri, 14 Apr 2017 15:22:25 -0400
Subject: Python interface API will need to be cryptech.py11 for installation.

---
 py11/mutex.py | 88 -----------------------------------------------------------
 1 file changed, 88 deletions(-)
 delete mode 100644 py11/mutex.py

(limited to 'py11/mutex.py')

diff --git a/py11/mutex.py b/py11/mutex.py
deleted file mode 100644
index f71e006..0000000
--- a/py11/mutex.py
+++ /dev/null
@@ -1,88 +0,0 @@
-"""
-Optional Python mutex implementation for py11 library, using the
-threading.Lock primitive to provide the mutex itself.
-
-Most of the code in this module has to do with mapping between the
-Python and PKCS #11 APIs.
-
-If you just want locking, it's probably simpler to let the C code
-handle it, by passing CKF_OS_LOCKING_OK to C_Initialize().
-
-The main reason for having a complete implementation in Python is to
-test the API.
-
-Sample usage:
-
-  from p11 import *
-  from py11.mutex import MutexDB
-
-  p11 = PKCS11()
-  mdb = MutexDB()
-  p11.C_Initialize(0, mdb.create, mdb.destroy, mdb.lock, mdb.unlock)
-"""
-
-from struct      import pack, unpack
-from .types      import *
-from .exceptions import *
-
-# This controls how big our mutex handles are.
-encoded_format = "=L"
-
-# These are all determined by encoded_format, don't touch.
-
-encoded_length = len(pack(encoded_format, 0))
-encoded_type   = CK_BYTE * encoded_length
-handle_max     = unpack(encoded_format, chr(0xff) * encoded_length)[0]
-
-class Mutex(object):
-
-  def __init__(self, handle):
-    from threading import Lock
-    self.encoded = encoded_type(*handle)
-    self.lock    = Lock()
-
-def p11_callback(func):
-  from threading import ThreadError
-  def wrapper(self, arg):
-    try:
-      func(self, arg)
-    except ThreadError, e:
-      print "Failed: %s" % e
-      return CKR_MUTEX_NOT_LOCKED.ckr_code
-    except Exception, e:
-      print "Failed: %s" % e
-      return CKR_FUNCTION_FAILED.ckr_code
-    else:
-      return CKR_OK
-  return wrapper
-
-class MutexDB(object):
-
-  def __init__(self):
-    self.mutexes = {}
-    self.next_handle = 0
-
-  def find_free_handle(self):
-    if len(self.mutexes) > handle_max:
-      raise RuntimeError
-    while self.next_handle in self.mutexes:
-      self.next_handle = (self.next_handle + 1) & handle_max
-    return pack(encoded_format, self.next_handle)
-
-  @p11_callback
-  def create(self, handle_ptr):
-    handle = self.find_free_handle()
-    self.mutexes[handle] = Mutex(handle)
-    handle_ptr[0] = self.mutexes[handle].encoded
-
-  @p11_callback
-  def destroy(self, handle):
-    del self.mutexes[handle[:encoded_length]]
-
-  @p11_callback
-  def lock(self, handle):
-    self.mutexes[handle[:encoded_length]].lock.acquire()
-
-  @p11_callback
-  def unlock(self, handle):
-    self.mutexes[handle[:encoded_length]].lock.release()
-- 
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