From f9285f99e6bb7a29e93531ddef434e38d004fa12 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20F=C3=A4hrmann?= <mike_faehrmann@web.de>
Date: Mon, 2 Sep 2019 22:34:04 +0200
Subject: [PATCH] [pixiv] fix authentication

---
 gallery_dl/extractor/pixiv.py | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/gallery_dl/extractor/pixiv.py b/gallery_dl/extractor/pixiv.py
index 4f8ee9c2..8e6a74ed 100644
--- a/gallery_dl/extractor/pixiv.py
+++ b/gallery_dl/extractor/pixiv.py
@@ -12,6 +12,7 @@ from .common import Extractor, Message
 from .. import text, exception
 from ..cache import cache
 from datetime import datetime, timedelta
+import hashlib
 
 
 class PixivExtractor(Extractor):
@@ -395,6 +396,8 @@ class PixivAppAPI():
     """
     CLIENT_ID = "MOBrBDS8blbauoSck0ZfDbtuzpyT"
     CLIENT_SECRET = "lsACyCD94FhDUtGTXi3QzcFE2uU1hqtDaKeqrdwj"
+    HASH_SECRET = ("28c1fdd170a5204386cb1313c7077b34"
+                   "f83e4aaf4aa829ce78c231e05b0bae2c")
 
     def __init__(self, extractor):
         self.extractor = extractor
@@ -406,7 +409,6 @@ class PixivAppAPI():
             "client-id", self.CLIENT_ID)
         self.client_secret = extractor.config(
             "client-secret", self.CLIENT_SECRET)
-
         extractor.session.headers.update({
             "App-OS": "ios",
             "App-OS-Version": "10.3.1",
@@ -440,8 +442,15 @@ class PixivAppAPI():
             data["username"] = username
             data["password"] = password
 
+        time = datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%S+00:00")
+        headers = {
+            "X-Client-Time": time,
+            "X-Client-Hash": hashlib.md5(
+                (time + self.HASH_SECRET).encode()).hexdigest(),
+        }
+
         response = self.extractor.request(
-            url, method="POST", data=data, fatal=False)
+            url, method="POST", headers=headers, data=data, fatal=False)
         if response.status_code >= 400:
             raise exception.AuthenticationError()