[exhentai] try to avoid 'DH_KEY_TOO_SMALL' errors (#1021, #4593)

gallery_dl/extractor/common.py

@@ -35,6 +35,7 @@ class Extractor():
     root = ""
     cookies_domain = ""
     referer = True
+    ciphers = None
     tls12 = True
     browser = None
     request_interval = 0.0
@@ -305,6 +306,7 @@ class Extractor():
             headers["User-Agent"] = useragent
             headers["Accept"] = "*/*"
             headers["Accept-Language"] = "en-US,en;q=0.5"
+            ssl_ciphers = self.ciphers
 
         if BROTLI:
             headers["Accept-Encoding"] = "gzip, deflate, br"

gallery_dl/extractor/exhentai.py

@@ -27,6 +27,7 @@ class ExhentaiExtractor(Extractor):
     cookies_names = ("ipb_member_id", "ipb_pass_hash")
     root = "https://exhentai.org"
     request_interval = 5.0
+    ciphers = "DEFAULT:!DH"
 
     LIMIT = False