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-rw-r--r--py11/attributes.py101
1 files changed, 0 insertions, 101 deletions
diff --git a/py11/attributes.py b/py11/attributes.py
deleted file mode 100644
index 56473ad..0000000
--- a/py11/attributes.py
+++ /dev/null
@@ -1,101 +0,0 @@
-# An attempt at a Python interface to PKCS 11 using the scary ctypes
-# module from the Python standard library.
-
-from struct import pack, unpack
-from ctypes import *
-from .types import *
-from .constants import *
-
-class Attribute(object):
-
- @classmethod
- def new(cls, attribute_name, type_name):
- from . import constants
- from . import types
- assert attribute_name.startswith("CKA_")
- attribute_number = getattr(constants, attribute_name)
- type_class = getattr(types, type_name, str)
- if type_class is CK_BBOOL:
- cls = Attribute_CK_BBOOL
- elif type_class is CK_ULONG:
- cls = Attribute_CK_ULONG
- elif type_name == "biginteger":
- cls = Attribute_biginteger
- return cls(attribute_name, attribute_number, type_name, type_class)
-
- def __init__(self, attribute_name, attribute_number, type_name, type_class):
- assert attribute_name.startswith("CKA_")
- self.name = attribute_name
- self.code = attribute_number
- self.type_name = type_name
- self.type_class = type_class
-
- def encode(self, x): return x
- def decode(self, x): return x
-
-class Attribute_CK_BBOOL(Attribute):
- def encode(self, x): return chr(int(x))
- def decode(self, x): return bool(ord(x))
-
-class Attribute_CK_ULONG(Attribute):
- def encode(self, x): return pack("L", x)
- def decode(self, x): return unpack("L", x)[0]
-
-class Attribute_biginteger(Attribute):
- def encode(self, x): return "\x00" if x == 0 else ("%0*x" % (((x.bit_length() + 7) / 8) * 2, x)).decode("hex")
- def decode(self, x): return long(x.encode("hex"), 16)
-
-
-class AttributeDB(object):
-
- def __init__(self):
- from .attribute_map import attribute_map
- self.db = {}
- for attribute_name, type_name in attribute_map.iteritems():
- a = Attribute.new(attribute_name, type_name)
- self.db[a.name] = a
- self.db[a.code] = a
-
- def encode(self, k, v):
- return self.db[k].encode(v) if k in self.db else v
-
- def decode(self, k, v):
- return self.db[k].decode(v) if k in self.db else v
-
- def getvalue_create_template(self, attributes):
- attributes = tuple(self.db[a].code for a in attributes)
- template = (CK_ATTRIBUTE * len(attributes))()
- for i in xrange(len(attributes)):
- template[i].type = attributes[i]
- template[i].pValue = None
- template[i].ulValueLen = 0
- return template
-
- def getvalue_allocate_template(self, template):
- for t in template:
- t.pValue = create_string_buffer(t.ulValueLen)
-
- def from_ctypes(self, template):
- return dict((t.type, self.decode(t.type, t.pValue[:t.ulValueLen]))
- for t in template)
-
- def to_ctypes(self, attributes):
- attributes = tuple(attributes.iteritems()
- if isinstance(attributes, dict) else
- attributes)
- template = (CK_ATTRIBUTE * len(attributes))()
- for i, kv in enumerate(attributes):
- k, v = kv
- if k in self.db:
- a = self.db[k]
- k, v = a.code, a.encode(v)
- template[i].type = k
- template[i].pValue = create_string_buffer(v)
- template[i].ulValueLen = len(v)
- return template
-
- def attribute_name(self, code):
- return self.db[code].name
-
- def attribute_code(self, name):
- return self.db[name].code