Add google-endpoints to third_party/.

third_party/google-endpoints/Crypto/Hash/MD5.py

+# -*- coding: utf-8 -*-
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+
+"""MD5 cryptographic hash algorithm.
+
+MD5 is specified in RFC1321_ and produces the 128 bit digest of a message.
+
+    >>> from Crypto.Hash import MD5
+    >>>
+    >>> h = MD5.new()
+    >>> h.update(b'Hello')
+    >>> print h.hexdigest()
+
+MD5 stand for Message Digest version 5, and it was invented by Rivest in 1991.
+
+This algorithm is insecure. Do not use it for new designs.
+
+.. _RFC1321: http://tools.ietf.org/html/rfc1321 
+"""
+
+_revision__ = "$Id$"
+
+__all__ = ['new', 'digest_size', 'MD5Hash' ]
+
+from Crypto.Util.py3compat import *
+from Crypto.Hash.hashalgo import HashAlgo
+
+try:
+    # The md5 module is deprecated in Python 2.6, so use hashlib when possible.
+    import hashlib
+    hashFactory = hashlib.md5
+
+except ImportError:
+    import md5
+    hashFactory = md5
+
+class MD5Hash(HashAlgo):
+    """Class that implements an MD5 hash
+    
+    :undocumented: block_size
+    """
+
+    #: ASN.1 Object identifier (OID)::
+    #:
+    #:  id-md5      OBJECT IDENTIFIER ::= {
+    #:      iso(1) member-body(2) us(840) rsadsi(113549)
+    #:       digestAlgorithm(2) 5
+    #:  }
+    #:
+    #: This value uniquely identifies the MD5 algorithm.
+    oid = b('\x06\x08\x2a\x86\x48\x86\xf7\x0d\x02\x05')
+
+    digest_size = 16
+    block_size = 64
+
+    def __init__(self, data=None):
+        HashAlgo.__init__(self, hashFactory, data)
+
+    def new(self, data=None):
+        return MD5Hash(data)
+
+def new(data=None):
+    """Return a fresh instance of the hash object.
+
+    :Parameters:
+       data : byte string
+        The very first chunk of the message to hash.
+        It is equivalent to an early call to `MD5Hash.update()`.
+        Optional.
+
+    :Return: A `MD5Hash` object
+    """
+    return MD5Hash().new(data)
+
+#: The size of the resulting hash in bytes.
+digest_size = MD5Hash.digest_size
+
+#: The internal block size of the hash algorithm in bytes.
+block_size = MD5Hash.block_size
+