# Pyrogram - Telegram MTProto API Client Library for Python

# Copyright (C) 2017-present Dan <https://github.com/delivrance>

#

# This file is part of Pyrogram.

#

# Pyrogram is free software: you can redistribute it and/or modify

# it under the terms of the GNU Lesser General Public License as published

# by the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# Pyrogram 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 Lesser General Public License for more details.

#

# You should have received a copy of the GNU Lesser General Public License

# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.

import asyncio

import base64

import functools

import hashlib

import os

import struct

from concurrent.futures.thread import ThreadPoolExecutor

from datetime import datetime, timezone

from getpass import getpass

from typing import Union, List, Dict, Optional

import pyrogram

from pyrogram import raw, enums

from pyrogram import types

from pyrogram.file_id import FileId, FileType, PHOTO_TYPES, DOCUMENT_TYPES

async def ainput(prompt: str = "", *, hide: bool = False):

"""Just like the built-in input, but async"""

with ThreadPoolExecutor(1) as executor:

func = functools.partial(getpass if hide else input, prompt)

return await asyncio.get_event_loop().run_in_executor(executor, func)

def get_input_media_from_file_id(

file_id: str,

expected_file_type: FileType = None,

ttl_seconds: int = None

) -> Union["raw.types.InputMediaPhoto", "raw.types.InputMediaDocument"]:

try:

decoded = FileId.decode(file_id)

except Exception:

raise ValueError(

f'Failed to decode "{file_id}". The value does not represent an existing local file, '

f"HTTP URL, or valid file id."

)

file_type = decoded.file_type

if expected_file_type is not None and file_type != expected_file_type:

raise ValueError(f"Expected {expected_file_type.name}, got {file_type.name} file id instead")

if file_type in (FileType.THUMBNAIL, FileType.CHAT_PHOTO):

raise ValueError(f"This file id can only be used for download: {file_id}")

if file_type in PHOTO_TYPES:

return raw.types.InputMediaPhoto(

id=raw.types.InputPhoto(

id=decoded.media_id,

access_hash=decoded.access_hash,

file_reference=decoded.file_reference

),

ttl_seconds=ttl_seconds

)

if file_type in DOCUMENT_TYPES:

return raw.types.InputMediaDocument(

id=raw.types.InputDocument(

id=decoded.media_id,

access_hash=decoded.access_hash,

file_reference=decoded.file_reference

),

ttl_seconds=ttl_seconds

)

raise ValueError(f"Unknown file id: {file_id}")

async def parse_messages(

client,

messages: "raw.types.messages.Messages",

replies: int = 1

) -> List["types.Message"]:

users = {i.id: i for i in messages.users}

chats = {i.id: i for i in messages.chats}

if not messages.messages:

return types.List()

parsed_messages = []

for message in messages.messages:

parsed_messages.append(await types.Message._parse(client, message, users, chats, replies=0))

if replies:

messages_with_replies = {

i.id: i.reply_to.reply_to_msg_id

for i in messages.messages

if not isinstance(i, raw.types.MessageEmpty) and i.reply_to

}

if messages_with_replies:

# We need a chat id, but some messages might be empty (no chat attribute available)

# Scan until we find a message with a chat available (there must be one, because we are fetching replies)

for m in parsed_messages:

if m.chat:

chat_id = m.chat.id

break

else:

chat_id = 0

reply_messages = await client.get_messages(

chat_id,

reply_to_message_ids=messages_with_replies.keys(),

replies=replies - 1

)

for message in parsed_messages:

reply_id = messages_with_replies.get(message.id, None)

for reply in reply_messages:

if reply.id == reply_id:

message.reply_to_message = reply

return types.List(parsed_messages)

def parse_deleted_messages(client, update) -> List["types.Message"]:

messages = update.messages

channel_id = getattr(update, "channel_id", None)

parsed_messages = []

for message in messages:

parsed_messages.append(

types.Message(

id=message,

chat=types.Chat(

id=get_channel_id(channel_id),

type=enums.ChatType.CHANNEL,

client=client

) if channel_id is not None else None,

client=client

)

)

return types.List(parsed_messages)

def pack_inline_message_id(msg_id: "raw.base.InputBotInlineMessageID"):

if isinstance(msg_id, raw.types.InputBotInlineMessageID):

inline_message_id_packed = struct.pack(

"<iqq",

msg_id.dc_id,

msg_id.id,

msg_id.access_hash

)

else:

inline_message_id_packed = struct.pack(

"<iqiq",

msg_id.dc_id,

msg_id.owner_id,

msg_id.id,

msg_id.access_hash

)

return base64.urlsafe_b64encode(inline_message_id_packed).decode().rstrip("=")

def unpack_inline_message_id(inline_message_id: str) -> "raw.base.InputBotInlineMessageID":

padded = inline_message_id + "=" * (-len(inline_message_id) % 4)

decoded = base64.urlsafe_b64decode(padded)

if len(decoded) == 20:

unpacked = struct.unpack("<iqq", decoded)

return raw.types.InputBotInlineMessageID(

dc_id=unpacked[0],

id=unpacked[1],

access_hash=unpacked[2]

)

else:

unpacked = struct.unpack("<iqiq", decoded)

return raw.types.InputBotInlineMessageID64(

dc_id=unpacked[0],

owner_id=unpacked[1],

id=unpacked[2],

access_hash=unpacked[3]

)

MIN_CHANNEL_ID = -1002147483647

MAX_CHANNEL_ID = -1000000000000

MIN_CHAT_ID = -2147483647

MAX_USER_ID_OLD = 2147483647

MAX_USER_ID = 999999999999

def get_raw_peer_id(peer: raw.base.Peer) -> Optional[int]:

"""Get the raw peer id from a Peer object"""

if isinstance(peer, raw.types.PeerUser):

return peer.user_id

if isinstance(peer, raw.types.PeerChat):

return peer.chat_id

if isinstance(peer, raw.types.PeerChannel):

return peer.channel_id

return None

def get_peer_id(peer: raw.base.Peer) -> int:

"""Get the non-raw peer id from a Peer object"""

if isinstance(peer, raw.types.PeerUser):

return peer.user_id

if isinstance(peer, raw.types.PeerChat):

return -peer.chat_id

if isinstance(peer, raw.types.PeerChannel):

return MAX_CHANNEL_ID - peer.channel_id

raise ValueError(f"Peer type invalid: {peer}")

def get_peer_type(peer_id: int) -> str:

if peer_id < 0:

if MIN_CHAT_ID <= peer_id:

return "chat"

if MIN_CHANNEL_ID <= peer_id < MAX_CHANNEL_ID:

return "channel"

elif 0 < peer_id <= MAX_USER_ID:

return "user"

raise ValueError(f"Peer id invalid: {peer_id}")

def get_channel_id(peer_id: int) -> int:

return MAX_CHANNEL_ID - peer_id

def btoi(b: bytes) -> int:

return int.from_bytes(b, "big")

def itob(i: int) -> bytes:

return i.to_bytes(256, "big")

def sha256(data: bytes) -> bytes:

return hashlib.sha256(data).digest()

def xor(a: bytes, b: bytes) -> bytes:

return bytes(i ^ j for i, j in zip(a, b))

def compute_password_hash(

algo: raw.types.PasswordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow,

password: str

) -> bytes:

hash1 = sha256(algo.salt1 + password.encode() + algo.salt1)

hash2 = sha256(algo.salt2 + hash1 + algo.salt2)

hash3 = hashlib.pbkdf2_hmac("sha512", hash2, algo.salt1, 100000)

return sha256(algo.salt2 + hash3 + algo.salt2)

# noinspection PyPep8Naming

def compute_password_check(

r: raw.types.account.Password,

password: str

) -> raw.types.InputCheckPasswordSRP:

algo = r.current_algo

p_bytes = algo.p

p = btoi(algo.p)

g_bytes = itob(algo.g)

g = algo.g

B_bytes = r.srp_B

B = btoi(B_bytes)

srp_id = r.srp_id

x_bytes = compute_password_hash(algo, password)

x = btoi(x_bytes)

g_x = pow(g, x, p)

k_bytes = sha256(p_bytes + g_bytes)

k = btoi(k_bytes)

kg_x = (k * g_x) % p

while True:

a_bytes = os.urandom(256)

a = btoi(a_bytes)

A = pow(g, a, p)

A_bytes = itob(A)

u = btoi(sha256(A_bytes + B_bytes))

if u > 0:

break

g_b = (B - kg_x) % p

ux = u * x

a_ux = a + ux

S = pow(g_b, a_ux, p)

S_bytes = itob(S)

K_bytes = sha256(S_bytes)

M1_bytes = sha256(

xor(sha256(p_bytes), sha256(g_bytes))

+ sha256(algo.salt1)

+ sha256(algo.salt2)

+ A_bytes

+ B_bytes

+ K_bytes

)

return raw.types.InputCheckPasswordSRP(srp_id=srp_id, A=A_bytes, M1=M1_bytes)

async def parse_text_entities(

client: "pyrogram.Client",

text: str,

parse_mode: enums.ParseMode,

entities: List["types.MessageEntity"]

) -> Dict[str, Union[str, List[raw.base.MessageEntity]]]:

if entities:

# Inject the client instance because parsing user mentions requires it

for entity in entities:

entity._client = client

text, entities = text, [await entity.write() for entity in entities] or None

else:

text, entities = (await client.parser.parse(text, parse_mode)).values()

return {

"message": text,

"entities": entities

}

def zero_datetime() -> datetime:

return datetime.fromtimestamp(0, timezone.utc)

def timestamp_to_datetime(ts: Optional[int]) -> Optional[datetime]:

return datetime.fromtimestamp(ts) if ts else None

def datetime_to_timestamp(dt: Optional[datetime]) -> Optional[int]:

return int(dt.timestamp()) if dt else None