1 files changed, 0 insertions, 59 deletions
diff --git a/src/cryptography/hazmat/backends/commoncrypto/hmac.py b/src/cryptography/hazmat/backends/commoncrypto/hmac.py
deleted file mode 100644
index ae623d84..00000000
--- a/src/cryptography/hazmat/backends/commoncrypto/hmac.py
+++ /dev/null
@@ -1,59 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-
-from __future__ import absolute_import, division, print_function
-
-from cryptography import utils
-from cryptography.exceptions import (
-    InvalidSignature, UnsupportedAlgorithm, _Reasons
-)
-from cryptography.hazmat.primitives import constant_time, hashes, interfaces
-
-
-@utils.register_interface(interfaces.MACContext)
-@utils.register_interface(hashes.HashContext)
-class _HMACContext(object):
-    def __init__(self, backend, key, algorithm, ctx=None):
-        self._algorithm = algorithm
-        self._backend = backend
-        if ctx is None:
-            ctx = self._backend._ffi.new("CCHmacContext *")
-            try:
-                alg = self._backend._supported_hmac_algorithms[algorithm.name]
-            except KeyError:
-                raise UnsupportedAlgorithm(
-                    "{0} is not a supported HMAC hash on this backend.".format(
-                        algorithm.name),
-                    _Reasons.UNSUPPORTED_HASH
-                )
-
-            self._backend._lib.CCHmacInit(ctx, alg, key, len(key))
-
-        self._ctx = ctx
-        self._key = key
-
-    algorithm = utils.read_only_property("_algorithm")
-
-    def copy(self):
-        copied_ctx = self._backend._ffi.new("CCHmacContext *")
-        # CommonCrypto has no APIs for copying HMACs, so we have to copy the
-        # underlying struct.
-        copied_ctx[0] = self._ctx[0]
-        return _HMACContext(
-            self._backend, self._key, self.algorithm, ctx=copied_ctx
-        )
-
-    def update(self, data):
-        self._backend._lib.CCHmacUpdate(self._ctx, data, len(data))
-
-    def finalize(self):
-        buf = self._backend._ffi.new("unsigned char[]",
-                                     self.algorithm.digest_size)
-        self._backend._lib.CCHmacFinal(self._ctx, buf)
-        return self._backend._ffi.buffer(buf)[:]
-
-    def verify(self, signature):
-        digest = self.finalize()
-        if not constant_time.bytes_eq(digest, signature):
-            raise InvalidSignature("Signature did not match digest.")