mirror of https://github.com/PurpleI2P/pyseeder
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119 lines
3.9 KiB
119 lines
3.9 KiB
import os |
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import time, datetime |
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import random |
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import io |
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from zipfile import ZipFile, ZIP_DEFLATED |
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import pyseeder.crypto |
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from pyseeder.utils import PyseederException |
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class SU3File: |
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"""SU3 file format""" |
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def __init__(self, signer_id): |
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self.SIGNER_ID = signer_id |
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self.SIGNER_ID_LENGTH = len(self.SIGNER_ID) |
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self.SIGNATURE_TYPE = 0x0006 |
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self.SIGNATURE_LENGTH = 512 |
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self.VERSION_LENGTH = 0x10 |
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self.FILE_TYPE = None |
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self.CONTENT_TYPE = None |
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self.CONTENT = None |
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self.CONTENT_LENGTH = None |
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self.VERSION = str(int(time.time())).encode("utf-8") |
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#self.keytype = "RSA_SHA512_4096" |
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self.OUTPUT = None |
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def write(self, filename, priv_key, priv_key_password=None): |
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"""Write file to disc""" |
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nullbyte = bytes([0]) |
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self.OUTPUT = "I2Psu3".encode("utf-8") |
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self.OUTPUT += bytes([0,0]) |
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self.OUTPUT += self.SIGNATURE_TYPE.to_bytes(2, "big") |
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self.OUTPUT += self.SIGNATURE_LENGTH.to_bytes(2, "big") |
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self.OUTPUT += nullbyte |
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self.OUTPUT += bytes([self.VERSION_LENGTH]) |
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self.OUTPUT += nullbyte |
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self.OUTPUT += bytes([self.SIGNER_ID_LENGTH]) |
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self.OUTPUT += self.CONTENT_LENGTH.to_bytes(8, "big") |
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self.OUTPUT += nullbyte |
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self.OUTPUT += bytes([self.FILE_TYPE]) |
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self.OUTPUT += nullbyte |
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self.OUTPUT += bytes([self.CONTENT_TYPE]) |
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self.OUTPUT += bytes([0 for _ in range(12)]) |
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self.OUTPUT += self.VERSION + bytes( |
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[0 for _ in range(16 - len(self.VERSION))]) |
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self.OUTPUT += self.SIGNER_ID.encode("utf-8") |
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self.OUTPUT += self.CONTENT |
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with open(filename + "-data", "wb") as f: |
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f.write(self.OUTPUT) |
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signature = pyseeder.crypto.get_signature(self.OUTPUT, priv_key, priv_key_password) |
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with open(filename + "-sig", "wb") as f: |
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f.write(signature) |
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self.OUTPUT += signature |
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with open(filename, "wb") as f: |
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f.write(self.OUTPUT) |
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def reseed(self, netdb, yggseeds): |
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"""Compress netdb entries and set content""" |
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seeds = 75 |
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zip_file = io.BytesIO() |
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dat_files = [] |
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dat_yggfiles = [] |
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if yggseeds > 0: |
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import re |
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pattern = re.compile(b'host=.[23]..:') |
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timelimit = time.time() - float(3600 * 10) # current time minus 10 hours |
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for root, dirs, files in os.walk(netdb): |
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for f in files: |
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if f.endswith(".dat"): |
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path = os.path.join(root, f) |
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file_added = False |
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if os.path.getmtime(path) < timelimit: # modified time older than 10h |
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continue |
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if yggseeds > 0: |
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for line in open(path, "rb"): |
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if pattern.search(line): |
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dat_yggfiles.append(path) |
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file_added = True |
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break |
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if not file_added: |
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dat_files.append(path) |
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if yggseeds > 0: |
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if len(dat_yggfiles) == 0: |
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raise PyseederException("Can't get enough netDb entries with yggdrasil addresses") |
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elif len(dat_yggfiles) > yggseeds: |
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dat_yggfiles = random.sample(dat_yggfiles, yggseeds) |
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seeds = seeds - len(dat_yggfiles) |
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if len(dat_files) == 0: |
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raise PyseederException("Can't get enough netDb entries") |
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elif len(dat_files) > seeds: |
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dat_files = random.sample(dat_files, seeds) |
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dat_files.extend(dat_yggfiles) |
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with ZipFile(zip_file, "w", compression=ZIP_DEFLATED) as zf: |
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for f in dat_files: |
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zf.write(f, arcname=os.path.split(f)[1]) |
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self.FILE_TYPE = 0x00 |
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self.CONTENT_TYPE = 0x03 |
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self.CONTENT = zip_file.getvalue() |
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self.CONTENT_LENGTH = len(self.CONTENT)
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