[mangafire] export 'VRF' functions
This commit is contained in:
Mike Fährmann
@@ -11,7 +11,6 @@
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from .common import ChapterExtractor, MangaExtractor
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from .. import text, exception
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from ..cache import memcache
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import binascii
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BASE_PATTERN = r"(?:https?://)?(?:www\.)?mangafire\.to"
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@@ -53,7 +52,8 @@ class MangafireChapterExtractor(MangafireBase, ChapterExtractor):
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def images(self, page):
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url = f"{self.root}/ajax/read/{self.type}/{self.chapter_id}"
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params = {"vrf": generate_VRF(f"{self.type}@{self.chapter_id}")}
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params = {"vrf": self.utils("vrf").generate(
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f"{self.type}@{self.chapter_id}")}
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headers = {"x-requested-with": "XMLHttpRequest"}
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data = self.request_json(url, params=params, headers=headers)
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@@ -131,7 +131,7 @@ def _manga_info(self, manga_path, page=None):
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def _manga_chapters(self, manga_info):
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manga_id, type, lang = manga_info
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url = f"{self.root}/ajax/read/{manga_id}/{type}/{lang}"
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params = {"vrf": generate_VRF(f"{manga_id}@{type}@{lang}")}
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params = {"vrf": self.utils("vrf").generate(f"{manga_id}@{type}@{lang}")}
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headers = {"x-requested-with": "XMLHttpRequest"}
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data = self.request_json(url, params=params, headers=headers)
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@@ -169,122 +169,3 @@ def _chapter_info(info):
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"title" : text.unescape(text.extr(info, 'title="', '"')),
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"lang" : lang,
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}
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###############################################################################
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# VRF generation utils
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#
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# adapted from dazedcat19/FMD2
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# https://github.com/dazedcat19/FMD2/blob/master/lua/modules/MangaFire.lua
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def generate_VRF(input):
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input = text.quote(input).encode()
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for key_b64, seed_b64, prefix_b64, schedule in (
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(key_l, seed_A, prefix_O, schedule_c),
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(key_g, seed_V, prefix_v, schedule_y),
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(key_B, seed_N, prefix_L, schedule_b),
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(key_m, seed_P, prefix_p, schedule_j),
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(key_F, seed_k, prefix_W, schedule_e),
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):
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input = transform(
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rc4(binascii.a2b_base64(key_b64), input),
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binascii.a2b_base64(seed_b64),
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binascii.a2b_base64(prefix_b64),
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schedule,
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)
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return binascii.b2a_base64(bytes(input), newline=False).rstrip(
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b"=").replace(b"+", b"-").replace(b"/", b"_")
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def transform(input, seed, prefix, schedule):
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prefix_len = len(prefix)
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out = []
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for idx, c in enumerate(input):
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if idx < prefix_len:
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out.append(prefix[idx] or 0)
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out.append(schedule[idx % 10]((c ^ seed[idx % 32]) & 255) & 255)
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return out
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def rc4(key, input):
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lkey = len(key)
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j = 0
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s = list(range(256))
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for i in range(256):
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j = (j + s[i] + key[i % lkey]) & 255
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s[i], s[j] = s[j], s[i]
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out = []
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i = j = 0
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for c in input:
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i = (i + 1) & 255
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j = (j + s[i]) & 255
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s[i], s[j] = s[j], s[i]
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k = s[(s[i] + s[j]) & 255]
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out.append(c ^ k)
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return out
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def add8(n):
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return lambda c: (c + n) & 255
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def sub8(n):
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return lambda c: (c - n + 256) & 255
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def xor8(n):
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return lambda c: (c ^ n) & 255
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def rotl8(n):
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return lambda c: ((c << n) | (c >> (8 - n))) & 255
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def rotr8(n):
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return lambda c: ((c >> n) | (c << (8 - n))) & 255
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schedule_c = (
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sub8(223), rotr8(4), rotr8(4), add8(234), rotr8(7),
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rotr8(2), rotr8(7), sub8(223), rotr8(7), rotr8(6),
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)
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schedule_y = (
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add8(19), rotr8(7), add8(19), rotr8(6), add8(19),
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rotr8(1), add8(19), rotr8(6), rotr8(7), rotr8(4),
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)
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schedule_b = (
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sub8(223), rotr8(1), add8(19), sub8(223), rotl8(2),
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sub8(223), add8(19), rotl8(1), rotl8(2), rotl8(1),
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)
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schedule_j = (
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add8(19), rotl8(1), rotl8(1), rotr8(1), add8(234),
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rotl8(1), sub8(223), rotl8(6), rotl8(4), rotl8(1),
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)
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schedule_e = (
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rotr8(1), rotl8(1), rotl8(6), rotr8(1), rotl8(2),
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rotr8(4), rotl8(1), rotl8(1), sub8(223), rotl8(2),
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)
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key_l = "FgxyJUQDPUGSzwbAq/ToWn4/e8jYzvabE+dLMb1XU1o="
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key_g = "CQx3CLwswJAnM1VxOqX+y+f3eUns03ulxv8Z+0gUyik="
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key_B = "fAS+otFLkKsKAJzu3yU+rGOlbbFVq+u+LaS6+s1eCJs="
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key_m = "Oy45fQVK9kq9019+VysXVlz1F9S1YwYKgXyzGlZrijo="
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key_F = "aoDIdXezm2l3HrcnQdkPJTDT8+W6mcl2/02ewBHfPzg="
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seed_A = "yH6MXnMEcDVWO/9a6P9W92BAh1eRLVFxFlWTHUqQ474="
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seed_V = "RK7y4dZ0azs9Uqz+bbFB46Bx2K9EHg74ndxknY9uknA="
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seed_N = "rqr9HeTQOg8TlFiIGZpJaxcvAaKHwMwrkqojJCpcvoc="
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seed_P = "/4GPpmZXYpn5RpkP7FC/dt8SXz7W30nUZTe8wb+3xmU="
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seed_k = "wsSGSBXKWA9q1oDJpjtJddVxH+evCfL5SO9HZnUDFU8="
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prefix_O = "l9PavRg="
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prefix_v = "Ml2v7ag1Jg=="
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prefix_L = "i/Va0UxrbMo="
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prefix_p = "WFjKAHGEkQM="
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prefix_W = "5Rr27rWd"
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129
gallery_dl/extractor/utils/mangafire_vrf.py
Normal file
129
gallery_dl/extractor/utils/mangafire_vrf.py
Normal file
@@ -0,0 +1,129 @@
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# -*- coding: utf-8 -*-
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# Copyright 2026 Mike Fährmann
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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"""VRF generation utils
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adapted from dazedcat19/FMD2
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https://github.com/dazedcat19/FMD2/blob/master/lua/modules/MangaFire.lua
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"""
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from ... import text
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import binascii
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def generate(input):
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input = text.quote(input).encode()
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for key_b64, seed_b64, prefix_b64, schedule in (
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(key_l, seed_A, prefix_O, schedule_c),
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(key_g, seed_V, prefix_v, schedule_y),
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(key_B, seed_N, prefix_L, schedule_b),
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(key_m, seed_P, prefix_p, schedule_j),
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(key_F, seed_k, prefix_W, schedule_e),
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):
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input = transform(
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rc4(binascii.a2b_base64(key_b64), input),
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binascii.a2b_base64(seed_b64),
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binascii.a2b_base64(prefix_b64),
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schedule,
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)
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return binascii.b2a_base64(bytes(input), newline=False).rstrip(
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b"=").replace(b"+", b"-").replace(b"/", b"_")
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def transform(input, seed, prefix, schedule):
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prefix_len = len(prefix)
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out = []
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for idx, c in enumerate(input):
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if idx < prefix_len:
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out.append(prefix[idx] or 0)
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out.append(schedule[idx % 10]((c ^ seed[idx % 32]) & 255) & 255)
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return out
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def rc4(key, input):
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lkey = len(key)
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j = 0
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s = list(range(256))
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for i in range(256):
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j = (j + s[i] + key[i % lkey]) & 255
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s[i], s[j] = s[j], s[i]
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out = []
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i = j = 0
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for c in input:
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i = (i + 1) & 255
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j = (j + s[i]) & 255
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s[i], s[j] = s[j], s[i]
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k = s[(s[i] + s[j]) & 255]
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out.append(c ^ k)
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return out
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def add8(n):
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return lambda c: (c + n) & 255
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def sub8(n):
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return lambda c: (c - n + 256) & 255
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def xor8(n):
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return lambda c: (c ^ n) & 255
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def rotl8(n):
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return lambda c: ((c << n) | (c >> (8 - n))) & 255
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def rotr8(n):
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return lambda c: ((c >> n) | (c << (8 - n))) & 255
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schedule_c = (
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sub8(223), rotr8(4), rotr8(4), add8(234), rotr8(7),
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rotr8(2), rotr8(7), sub8(223), rotr8(7), rotr8(6),
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)
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schedule_y = (
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add8(19), rotr8(7), add8(19), rotr8(6), add8(19),
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rotr8(1), add8(19), rotr8(6), rotr8(7), rotr8(4),
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)
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schedule_b = (
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sub8(223), rotr8(1), add8(19), sub8(223), rotl8(2),
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sub8(223), add8(19), rotl8(1), rotl8(2), rotl8(1),
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)
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schedule_j = (
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add8(19), rotl8(1), rotl8(1), rotr8(1), add8(234),
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rotl8(1), sub8(223), rotl8(6), rotl8(4), rotl8(1),
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)
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schedule_e = (
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rotr8(1), rotl8(1), rotl8(6), rotr8(1), rotl8(2),
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rotr8(4), rotl8(1), rotl8(1), sub8(223), rotl8(2),
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)
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key_l = "FgxyJUQDPUGSzwbAq/ToWn4/e8jYzvabE+dLMb1XU1o="
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key_g = "CQx3CLwswJAnM1VxOqX+y+f3eUns03ulxv8Z+0gUyik="
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key_B = "fAS+otFLkKsKAJzu3yU+rGOlbbFVq+u+LaS6+s1eCJs="
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key_m = "Oy45fQVK9kq9019+VysXVlz1F9S1YwYKgXyzGlZrijo="
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key_F = "aoDIdXezm2l3HrcnQdkPJTDT8+W6mcl2/02ewBHfPzg="
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seed_A = "yH6MXnMEcDVWO/9a6P9W92BAh1eRLVFxFlWTHUqQ474="
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seed_V = "RK7y4dZ0azs9Uqz+bbFB46Bx2K9EHg74ndxknY9uknA="
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seed_N = "rqr9HeTQOg8TlFiIGZpJaxcvAaKHwMwrkqojJCpcvoc="
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seed_P = "/4GPpmZXYpn5RpkP7FC/dt8SXz7W30nUZTe8wb+3xmU="
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seed_k = "wsSGSBXKWA9q1oDJpjtJddVxH+evCfL5SO9HZnUDFU8="
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prefix_O = "l9PavRg="
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prefix_v = "Ml2v7ag1Jg=="
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prefix_L = "i/Va0UxrbMo="
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prefix_p = "WFjKAHGEkQM="
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prefix_W = "5Rr27rWd"
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