aboutsummaryrefslogtreecommitdiff
path: root/frozen_deps/Cryptodome/Hash/MD4.py
diff options
context:
space:
mode:
Diffstat (limited to 'frozen_deps/Cryptodome/Hash/MD4.py')
-rw-r--r--frozen_deps/Cryptodome/Hash/MD4.py185
1 files changed, 185 insertions, 0 deletions
diff --git a/frozen_deps/Cryptodome/Hash/MD4.py b/frozen_deps/Cryptodome/Hash/MD4.py
new file mode 100644
index 0000000..668fa65
--- /dev/null
+++ b/frozen_deps/Cryptodome/Hash/MD4.py
@@ -0,0 +1,185 @@
+# ===================================================================
+#
+# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+# ===================================================================
+
+"""
+MD4 is specified in RFC1320_ and produces the 128 bit digest of a message.
+
+ >>> from Cryptodome.Hash import MD4
+ >>>
+ >>> h = MD4.new()
+ >>> h.update(b'Hello')
+ >>> print h.hexdigest()
+
+MD4 stand for Message Digest version 4, and it was invented by Rivest in 1990.
+This algorithm is insecure. Do not use it for new designs.
+
+.. _RFC1320: http://tools.ietf.org/html/rfc1320
+"""
+
+from Cryptodome.Util.py3compat import bord
+
+from Cryptodome.Util._raw_api import (load_pycryptodome_raw_lib,
+ VoidPointer, SmartPointer,
+ create_string_buffer,
+ get_raw_buffer, c_size_t,
+ c_uint8_ptr)
+
+_raw_md4_lib = load_pycryptodome_raw_lib(
+ "Cryptodome.Hash._MD4",
+ """
+ int md4_init(void **shaState);
+ int md4_destroy(void *shaState);
+ int md4_update(void *hs,
+ const uint8_t *buf,
+ size_t len);
+ int md4_digest(const void *shaState,
+ uint8_t digest[20]);
+ int md4_copy(const void *src, void *dst);
+ """)
+
+
+class MD4Hash(object):
+ """Class that implements an MD4 hash
+ """
+
+ #: The size of the resulting hash in bytes.
+ digest_size = 16
+ #: The internal block size of the hash algorithm in bytes.
+ block_size = 64
+ #: ASN.1 Object ID
+ oid = "1.2.840.113549.2.4"
+
+ def __init__(self, data=None):
+ state = VoidPointer()
+ result = _raw_md4_lib.md4_init(state.address_of())
+ if result:
+ raise ValueError("Error %d while instantiating MD4"
+ % result)
+ self._state = SmartPointer(state.get(),
+ _raw_md4_lib.md4_destroy)
+ if data:
+ self.update(data)
+
+ def update(self, data):
+ """Continue hashing of a message by consuming the next chunk of data.
+
+ Repeated calls are equivalent to a single call with the concatenation
+ of all the arguments. In other words:
+
+ >>> m.update(a); m.update(b)
+
+ is equivalent to:
+
+ >>> m.update(a+b)
+
+ :Parameters:
+ data : byte string/byte array/memoryview
+ The next chunk of the message being hashed.
+ """
+
+ result = _raw_md4_lib.md4_update(self._state.get(),
+ c_uint8_ptr(data),
+ c_size_t(len(data)))
+ if result:
+ raise ValueError("Error %d while instantiating MD4"
+ % result)
+
+ def digest(self):
+ """Return the **binary** (non-printable) digest of the message that
+ has been hashed so far.
+
+ This method does not change the state of the hash object.
+ You can continue updating the object after calling this function.
+
+ :Return: A byte string of `digest_size` bytes. It may contain non-ASCII
+ characters, including null bytes.
+ """
+
+ bfr = create_string_buffer(self.digest_size)
+ result = _raw_md4_lib.md4_digest(self._state.get(),
+ bfr)
+ if result:
+ raise ValueError("Error %d while instantiating MD4"
+ % result)
+
+ return get_raw_buffer(bfr)
+
+ def hexdigest(self):
+ """Return the **printable** digest of the message that has been
+ hashed so far.
+
+ This method does not change the state of the hash object.
+
+ :Return: A string of 2* `digest_size` characters. It contains only
+ hexadecimal ASCII digits.
+ """
+
+ return "".join(["%02x" % bord(x) for x in self.digest()])
+
+ def copy(self):
+ """Return a copy ("clone") of the hash object.
+
+ The copy will have the same internal state as the original hash
+ object.
+ This can be used to efficiently compute the digests of strings that
+ share a common initial substring.
+
+ :Return: A hash object of the same type
+ """
+
+ clone = MD4Hash()
+ result = _raw_md4_lib.md4_copy(self._state.get(),
+ clone._state.get())
+ if result:
+ raise ValueError("Error %d while copying MD4" % result)
+ return clone
+
+ def new(self, data=None):
+ return MD4Hash(data)
+
+
+def new(data=None):
+ """Return a fresh instance of the hash object.
+
+ :Parameters:
+ data : byte string/byte array/memoryview
+ The very first chunk of the message to hash.
+ It is equivalent to an early call to `MD4Hash.update()`.
+ Optional.
+
+ :Return: A `MD4Hash` object
+ """
+ return MD4Hash().new(data)
+
+#: The size of the resulting hash in bytes.
+digest_size = MD4Hash.digest_size
+
+#: The internal block size of the hash algorithm in bytes.
+block_size = MD4Hash.block_size