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https://github.com/onionshare/onionshare.git
synced 2024-10-01 01:35:40 -04:00
Support for Censorship Circumvention API's /default route.
Fall back to trying Censorship API's /default route if no other bridges found. At time of writing, this returns a couple of built-in obfs4 bridges. If even that request fails, we will still fall back to our own full list of obfs4 bridges.
This commit is contained in:
Miguel Jacq
parent
52cb5cf71a
commit
9c4a598fc0
@ -100,7 +100,7 @@ class CensorshipCircumvention(object):
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if r.status_code != 200:
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self.common.log(
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"CensorshipCircumvention",
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"censorship_obtain_map",
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"request_map",
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f"status_code={r.status_code}",
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)
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return False
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@ -110,7 +110,7 @@ class CensorshipCircumvention(object):
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if "errors" in result:
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self.common.log(
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"CensorshipCircumvention",
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"censorship_obtain_map",
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"request_map",
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f"errors={result['errors']}",
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)
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return False
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@ -138,7 +138,7 @@ class CensorshipCircumvention(object):
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if country:
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self.common.log(
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"CensorshipCircumvention",
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"censorship_obtain_settings",
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"request_settings",
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f"Trying to obtain bridges for country={country}",
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)
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data = {"country": country}
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@ -154,7 +154,7 @@ class CensorshipCircumvention(object):
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if r.status_code != 200:
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self.common.log(
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"CensorshipCircumvention",
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"censorship_obtain_settings",
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"request_settings",
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f"status_code={r.status_code}",
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)
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return False
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@ -164,7 +164,7 @@ class CensorshipCircumvention(object):
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if "errors" in result:
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self.common.log(
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"CensorshipCircumvention",
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"censorship_obtain_settings",
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"request_settings",
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f"errors={result['errors']}",
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)
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return False
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@ -175,7 +175,7 @@ class CensorshipCircumvention(object):
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if not "settings" in result:
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self.common.log(
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"CensorshipCircumvention",
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"censorship_obtain_settings",
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"request_settings",
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"No settings found for this country",
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)
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return False
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@ -200,7 +200,7 @@ class CensorshipCircumvention(object):
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if r.status_code != 200:
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self.common.log(
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"CensorshipCircumvention",
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"censorship_obtain_builtin_bridges",
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"request_builtin_bridges",
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f"status_code={r.status_code}",
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)
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return False
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@ -210,7 +210,7 @@ class CensorshipCircumvention(object):
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if "errors" in result:
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self.common.log(
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"CensorshipCircumvention",
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"censorship_obtain_builtin_bridges",
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"request_builtin_bridges",
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f"errors={result['errors']}",
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)
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return False
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@ -237,42 +237,15 @@ class CensorshipCircumvention(object):
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f"Obtained bridges: {bridges}",
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)
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bridge_strings = bridges["bridge_strings"]
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bridge_type = bridges["type"]
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bridge_source = bridges["source"]
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# If the recommended bridge source is to use the built-in
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# bridges, set that in our settings, as if the user had
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# selected the built-in bridges for a specific PT themselves.
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#
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if bridge_source == "builtin":
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self.common.log(
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"CensorshipCircumvention",
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"save_settings",
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"Will be using built-in bridges",
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)
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self.settings.set("bridges_type", "built-in")
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if bridge_type == "obfs4":
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self.settings.set("bridges_builtin_pt", "obfs4")
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if bridge_type == "snowflake":
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self.settings.set("bridges_builtin_pt", "snowflake")
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if bridge_type == "meek":
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self.settings.set("bridges_builtin_pt", "meek-azure")
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self.settings.set("bridges_type", "custom")
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# Sanity check the bridges provided from the Tor API before saving
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bridges_checked = self.common.check_bridges_valid(bridge_strings)
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if bridges_checked:
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self.settings.set("bridges_custom", "\n".join(bridges_checked))
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bridges_ok = True
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else:
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self.common.log(
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"CensorshipCircumvention",
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"save_settings",
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"Will be using custom bridges",
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)
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# Any other type of bridge we can treat as custom.
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self.settings.set("bridges_type", "custom")
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# Sanity check the bridges provided from the Tor API before saving
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bridges_checked = self.common.check_bridges_valid(bridge_strings)
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if bridges_checked:
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self.settings.set("bridges_custom", "\n".join(bridges_checked))
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bridges_ok = True
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# If we got any good bridges, save them to settings and return.
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if bridges_ok:
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@ -291,3 +264,42 @@ class CensorshipCircumvention(object):
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"Could not use any of the obtained bridges.",
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)
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return False
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def request_default_bridges(self):
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"""
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Retrieves the list of default fall-back bridges from the Tor Project.
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These are intended for when no censorship settings were found for a
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specific country, but maybe there was some connection issue anyway.
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"""
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if not self.api_proxies:
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return False
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endpoint = "https://bridges.torproject.org/moat/circumvention/defaults"
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try:
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r = requests.get(
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endpoint,
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headers={"Content-Type": "application/vnd.api+json"},
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proxies=self.api_proxies,
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)
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if r.status_code != 200:
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self.common.log(
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"CensorshipCircumvention",
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"request_default_bridges",
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f"status_code={r.status_code}",
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)
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return False
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result = r.json()
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if "errors" in result:
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self.common.log(
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"CensorshipCircumvention",
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"request_default_bridges",
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f"errors={result['errors']}",
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)
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return False
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return result
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except requests.exceptions.RequestException as e:
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raise CensorshipCircumventionError(e)
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@ -181,7 +181,9 @@ class AutoConnectTab(QtWidgets.QWidget):
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self.tor_con.start(self.curr_settings)
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def _got_no_bridges(self):
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# If we got no bridges, try connecting again using built-in obfs4 bridges
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# If we got no bridges, even after trying the default bridges
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# provided by the Censorship API, try connecting again using
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# our built-in obfs4 bridges
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self.curr_settings.set("bridges_type", "built-in")
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self.curr_settings.set("bridges_builtin_pt", "obfs4")
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self.curr_settings.set("bridges_enabled", True)
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@ -244,6 +246,16 @@ class AutoConnectTab(QtWidgets.QWidget):
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bridge_settings = self.censorship_circumvention.request_settings(
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country=country
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)
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if not bridge_settings:
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# Fall back to trying the default bridges from the API
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self.common.log(
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"AutoConnectTab",
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"use_bridge_connect_clicked",
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"Falling back to trying default bridges provided by the Censorship Circumvention API",
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)
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bridge_settings = self.censorship_circumvention.request_default_bridges()
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self.common.gui.meek.cleanup()
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if bridge_settings and self.censorship_circumvention.save_settings(
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