85 lines
2.0 KiB
Python
85 lines
2.0 KiB
Python
# Eos - Verifiable elections
|
|
# Copyright © 2017 RunasSudo (Yingtong Li)
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Affero General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU Affero General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
try:
|
|
__pragma__ = __pragma__
|
|
is_python = False
|
|
except:
|
|
is_python = True
|
|
def __pragma__(*args):
|
|
pass
|
|
|
|
from eos.core.bigint import *
|
|
|
|
# Libraries
|
|
# =========
|
|
|
|
if is_python:
|
|
__pragma__('skip')
|
|
import base64
|
|
import hashlib
|
|
__pragma__('noskip')
|
|
else:
|
|
# Load jssha-sha256.js
|
|
lib = __pragma__('js', '''
|
|
(function() {{
|
|
{}
|
|
var exports = {{}};
|
|
exports.jsSHA = window.jsSHA;
|
|
return exports;
|
|
}})()''', __include__('eos/core/hashing/jssha-sha256.js'))
|
|
|
|
# Implementation
|
|
# ==============
|
|
|
|
class SHA256:
|
|
nbits = 256
|
|
|
|
def __init__(self):
|
|
if is_python:
|
|
self.impl = hashlib.sha256()
|
|
else:
|
|
# TNYI: This is completely borked
|
|
self.impl = __pragma__('js', '{}', 'new lib.jsSHA("SHA-256", "TEXT")')
|
|
|
|
def update_text(self, *values):
|
|
for value in values:
|
|
if is_python:
|
|
self.impl.update(value.encode('utf-8'))
|
|
else:
|
|
self.impl.js_update(value)
|
|
return self
|
|
|
|
def update_bigint(self, *values):
|
|
for value in values:
|
|
self.update_text(str(value))
|
|
return self
|
|
|
|
def hash_as_b64(self):
|
|
if is_python:
|
|
return base64.b64encode(self.impl.digest()).decode('utf-8')
|
|
else:
|
|
return self.impl.getHash('B64')
|
|
|
|
def hash_as_hex(self):
|
|
if is_python:
|
|
return self.impl.hexdigest()
|
|
else:
|
|
return self.impl.getHash('HEX')
|
|
|
|
def hash_as_bigint(self):
|
|
return BigInt(self.hash_as_hex(), 16)
|