1 files changed, 101 insertions, 0 deletions
diff --git a/cryptography/hazmat/primitives/hashes.py b/cryptography/hazmat/primitives/hashes.py
new file mode 100644
index 00000000..023041cb
--- /dev/null
+++ b/cryptography/hazmat/primitives/hashes.py
@@ -0,0 +1,101 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
+import abc
+
+import binascii
+
+import six
+
+
+class BaseHash(six.with_metaclass(abc.ABCMeta)):
+    def __init__(self, data=None, backend=None, ctx=None):
+        if backend is None:
+            from cryptography.bindings import _default_backend
+            backend = _default_backend
+        self._backend = backend
+        if ctx is None:
+            self._ctx = self._backend.hashes.create_ctx(self)
+        else:
+            self._ctx = None
+
+        if data is not None:
+            self.update(data)
+
+    def update(self, data):
+        if isinstance(data, six.text_type):
+            raise TypeError("Unicode-objects must be encoded before hashing")
+        self._backend.hashes.update_ctx(self._ctx, data)
+
+    def copy(self):
+        return self.__class__(backend=self._backend, ctx=self._copy_ctx())
+
+    def digest(self):
+        return self._backend.hashes.finalize_ctx(self._copy_ctx(),
+                                                 self.digest_size)
+
+    def hexdigest(self):
+        return str(binascii.hexlify(self.digest()).decode("ascii"))
+
+    def _copy_ctx(self):
+        return self._backend.hashes.copy_ctx(self._ctx)
+
+
+class SHA1(BaseHash):
+    name = "sha1"
+    digest_size = 20
+    block_size = 64
+
+
+class SHA224(BaseHash):
+    name = "sha224"
+    digest_size = 28
+    block_size = 64
+
+
+class SHA256(BaseHash):
+    name = "sha256"
+    digest_size = 32
+    block_size = 64
+
+
+class SHA384(BaseHash):
+    name = "sha384"
+    digest_size = 48
+    block_size = 128
+
+
+class SHA512(BaseHash):
+    name = "sha512"
+    digest_size = 64
+    block_size = 128
+
+
+class RIPEMD160(BaseHash):
+    name = "ripemd160"
+    digest_size = 20
+    block_size = 64
+
+
+class Whirlpool(BaseHash):
+    name = "whirlpool"
+    digest_size = 64
+    block_size = 64
+
+
+class MD5(BaseHash):
+    name = "md5"
+    digest_size = 16
+    block_size = 64