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[utils] pkcs1pad: Fix invalid PKCS#1 v1.5 padding bytes (#17035)

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Ref: https://www.rfc-editor.org/info/rfc8017/#section-7.2.1

Authored by: doe1080
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doe1080 2026-06-27 07:28:58 +09:00 committed by GitHub
parent 917dad55e5
commit 25a05fc0e2
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1 changed files with 4 additions and 3 deletions
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7
yt_dlp/utils/_utils.py
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@ -28,6 +28,7 @@ import os
import platform import platform
import random import random
import re import re
import secrets
import shlex import shlex
import socket import socket
import ssl import ssl
@ -4428,16 +4429,16 @@ def ohdave_rsa_encrypt(data, exponent, modulus):
def pkcs1pad(data, length): def pkcs1pad(data, length):
""" """
Padding input data with PKCS#1 scheme Pad input data using EME-PKCS1-v1_5 encoding
@param {int[]} data input data @param {int[]} data input data
@param {int} length target length @param {int} length target length
@returns {int[]} padded data @returns {int[]} padded data
""" """
if len(data) > length - 11: if len(data) > length - 11:
raise ValueError('Input data too long for PKCS#1 padding') raise ValueError('Input data too long for EME-PKCS1-v1_5 encoding')
pseudo_random = [random.randint(0, 254) for _ in range(length - len(data) - 3)] pseudo_random = [secrets.randbelow(255) + 1 for _ in range(length - len(data) - 3)]
return [0, 2, *pseudo_random, 0, *data] return [0, 2, *pseudo_random, 0, *data]