Gecko [ www.smanegeri1koba.sch.id ]

Name	Size	Permission
__init__.py	1.51 KB	-rw-r--r--
_compat.py	4.24 KB	-rw-r--r--
asn1.py	1.74 KB	-rw-r--r--
cli.py	8.99 KB	-rw-r--r--
common.py	4.46 KB	-rw-r--r--
core.py	1.62 KB	-rw-r--r--
key.py	23.96 KB	-rw-r--r--
machine_size.py	2.3 KB	-rw-r--r--
parallel.py	2.27 KB	-rw-r--r--
pem.py	3.48 KB	-rw-r--r--
pkcs1.py	14.35 KB	-rw-r--r--
pkcs1_v2.py	3.38 KB	-rw-r--r--
prime.py	4.95 KB	-rw-r--r--
randnum.py	2.58 KB	-rw-r--r--
transform.py	6.44 KB	-rw-r--r--
util.py	2.99 KB	-rw-r--r--

Code Editor : core.py

# -*- coding: utf-8 -*-
#
#  Copyright 2011 Sybren A. Stüvel <sybren@stuvel.eu>
#
#  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
#
#      https://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.

"""Core mathematical operations.

This is the actual core RSA implementation, which is only defined
mathematically on integers.
"""

from rsa._compat import is_integer

def assert_int(var, name):
    if is_integer(var):
        return

raise TypeError('%s should be an integer, not %s' % (name, var.__class__))

def encrypt_int(message, ekey, n):
    """Encrypts a message using encryption key 'ekey', working modulo n"""

assert_int(message, 'message')
    assert_int(ekey, 'ekey')
    assert_int(n, 'n')

if message < 0:
        raise ValueError('Only non-negative numbers are supported')

if message > n:
        raise OverflowError("The message %i is too long for n=%i" % (message, n))

return pow(message, ekey, n)

def decrypt_int(cyphertext, dkey, n):
    """Decrypts a cypher text using the decryption key 'dkey', working modulo n"""

assert_int(cyphertext, 'cyphertext')
    assert_int(dkey, 'dkey')
    assert_int(n, 'n')

message = pow(cyphertext, dkey, n)
    return message

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Code Editor : core.py