state-res: Enforce integer PLs for room v10 on custom types

According to MSC3667

crates/ruma-state-res/src/event_auth.rs

@@ -19,11 +19,14 @@ use serde::{de::IgnoredAny, Deserialize};
 use serde_json::{from_str as from_json_str, value::RawValue as RawJsonValue};
 use tracing::{debug, error, info, warn};
 
-use crate::{room_version::RoomVersion, Error, Event, PowerLevelsContentFields, Result};
-
-mod int_power_levels;
-
-use int_power_levels::IntRoomPowerLevelsEventContent;
+use crate::{
+    power_levels::{
+        deserialize_power_levels, deserialize_power_levels_content_fields,
+        deserialize_power_levels_content_invite, deserialize_power_levels_content_redact,
+    },
+    room_version::RoomVersion,
+    Error, Event, Result,
+};
 
 // FIXME: field extracting could be bundled for `content`
 #[derive(Deserialize)]
@@ -37,11 +40,6 @@ struct RoomMemberContentFields {
     join_authorised_via_users_server: Option<Raw<OwnedUserId>>,
 }
 
-#[derive(Deserialize)]
-struct PowerLevelsContentInvite {
-    invite: Int,
-}
-
 /// For the given event `kind` what are the relevant auth events that are needed to authenticate
 /// this `content`.
 ///
@@ -337,15 +335,12 @@ pub fn auth_check<E: Event>(
 
     // If type is m.room.third_party_invite
     let sender_power_level = if let Some(pl) = &power_levels_event {
-        if let Ok(content) = from_json_str::<PowerLevelsContentFields>(pl.content().get()) {
+        let content = deserialize_power_levels_content_fields(pl.content().get(), room_version)?;
         if let Some(level) = content.users.get(sender) {
             *level
         } else {
             content.users_default
         }
-        } else {
-            int!(0) // TODO if this fails DB error?
-        }
     } else {
         // If no power level event found the creator gets 100 everyone else gets 0
         from_json_str::<RoomCreateEventContent>(room_create_event.content().get())
@@ -359,7 +354,8 @@ pub fn auth_check<E: Event>(
     if *incoming_event.event_type() == RoomEventType::RoomThirdPartyInvite {
         let invite_level = match &power_levels_event {
             Some(power_levels) => {
-                from_json_str::<PowerLevelsContentInvite>(power_levels.content().get())?.invite
+                deserialize_power_levels_content_invite(power_levels.content().get(), room_version)?
+                    .invite
             }
             None => int!(0),
         };
@@ -408,15 +404,12 @@ pub fn auth_check<E: Event>(
     if room_version.extra_redaction_checks
         && *incoming_event.event_type() == RoomEventType::RoomRedaction
     {
-        #[derive(Deserialize)]
-        struct PowerLevelsContentRedact {
-            redact: Int,
+        let redact_level = match power_levels_event {
+            Some(pl) => {
+                deserialize_power_levels_content_redact(pl.content().get(), room_version)?.redact
             }
-
-        let redact_level = power_levels_event
-            .and_then(|pl| from_json_str::<PowerLevelsContentRedact>(pl.content().get()).ok())
-            .map(|c| c.redact)
-            .unwrap_or_else(|| int!(50));
+            None => int!(50),
+        };
 
         if !check_redaction(room_version, incoming_event, sender_power_level, redact_level)? {
             return Ok(false);
@@ -500,12 +493,11 @@ fn valid_membership_change(
         // Is the authorised user allowed to invite users into this room
         let (auth_user_pl, invite_level) = if let Some(pl) = &power_levels_event {
             // TODO Refactor all powerlevel parsing
-            let invite = match from_json_str::<PowerLevelsContentInvite>(pl.content().get()) {
-                Ok(power_levels) => power_levels.invite,
-                _ => int!(0),
-            };
+            let invite =
+                deserialize_power_levels_content_invite(pl.content().get(), room_version)?.invite;
 
-            if let Ok(content) = from_json_str::<PowerLevelsContentFields>(pl.content().get()) {
+            let content =
+                deserialize_power_levels_content_fields(pl.content().get(), room_version)?;
             let user_pl = if let Some(level) = content.users.get(user_for_join_auth) {
                 *level
             } else {
@@ -513,9 +505,6 @@ fn valid_membership_change(
             };
 
             (user_pl, invite)
-            } else {
-                (int!(0), invite)
-            }
         } else {
             (int!(0), int!(0))
         };
@@ -877,31 +866,6 @@ fn check_power_levels(
     Some(true)
 }
 
-fn deserialize_power_levels(
-    content: &str,
-    room_version: &RoomVersion,
-) -> Option<RoomPowerLevelsEventContent> {
-    if room_version.integer_power_levels {
-        match from_json_str::<IntRoomPowerLevelsEventContent>(content) {
-            Ok(content) => Some(content.into()),
-            Err(_) => {
-                error!("m.room.power_levels event is not valid with integer values");
-                None
-            }
-        }
-    } else {
-        match from_json_str(content) {
-            Ok(content) => Some(content),
-            Err(_) => {
-                error!(
-                    "m.room.power_levels event is not valid with integer or string integer values"
-                );
-                None
-            }
-        }
-    }
-}
-
 fn get_deserialize_levels(
     old: &serde_json::Value,
     new: &serde_json::Value,

crates/ruma-state-res/src/event_auth/int_power_levels.rs

@@ -1,94 +0,0 @@
-use std::collections::BTreeMap;
-
-use js_int::Int;
-use ruma_common::{
-    events::{room::power_levels::RoomPowerLevelsEventContent, RoomEventType},
-    power_levels::{default_power_level, NotificationPowerLevels},
-    OwnedUserId,
-};
-use serde::Deserialize;
-
-#[derive(Deserialize)]
-pub struct IntRoomPowerLevelsEventContent {
-    #[serde(default = "default_power_level")]
-    pub ban: Int,
-
-    #[serde(default)]
-    pub events: BTreeMap<RoomEventType, Int>,
-
-    #[serde(default)]
-    pub events_default: Int,
-
-    #[serde(default)]
-    pub invite: Int,
-
-    #[serde(default = "default_power_level")]
-    pub kick: Int,
-
-    #[serde(default = "default_power_level")]
-    pub redact: Int,
-
-    #[serde(default = "default_power_level")]
-    pub state_default: Int,
-
-    #[serde(default)]
-    pub users: BTreeMap<OwnedUserId, Int>,
-
-    #[serde(default)]
-    pub users_default: Int,
-
-    #[serde(default)]
-    pub notifications: IntNotificationPowerLevels,
-}
-
-impl From<IntRoomPowerLevelsEventContent> for RoomPowerLevelsEventContent {
-    fn from(int_pl: IntRoomPowerLevelsEventContent) -> Self {
-        let IntRoomPowerLevelsEventContent {
-            ban,
-            events,
-            events_default,
-            invite,
-            kick,
-            redact,
-            state_default,
-            users,
-            users_default,
-            notifications,
-        } = int_pl;
-
-        let mut pl = Self::new();
-        pl.ban = ban;
-        pl.events = events;
-        pl.events_default = events_default;
-        pl.invite = invite;
-        pl.kick = kick;
-        pl.redact = redact;
-        pl.state_default = state_default;
-        pl.users = users;
-        pl.users_default = users_default;
-        pl.notifications = notifications.into();
-
-        pl
-    }
-}
-
-#[derive(Deserialize)]
-pub struct IntNotificationPowerLevels {
-    #[serde(default = "default_power_level")]
-    pub room: Int,
-}
-
-impl Default for IntNotificationPowerLevels {
-    fn default() -> Self {
-        Self { room: default_power_level() }
-    }
-}
-
-impl From<IntNotificationPowerLevels> for NotificationPowerLevels {
-    fn from(int_notif: IntNotificationPowerLevels) -> Self {
-        let mut notif = Self::new();
-        notif.room = int_notif.room;
-
-        notif
-    }
-}

crates/ruma-state-res/src/lib.rs

@@ -1,7 +1,7 @@
 use std::{
     borrow::Borrow,
     cmp::Reverse,
-    collections::{BTreeMap, BinaryHeap, HashMap, HashSet},
+    collections::{BinaryHeap, HashMap, HashSet},
     hash::Hash,
 };
 
@@ -12,14 +12,14 @@ use ruma_common::{
         room::member::{MembershipState, RoomMemberEventContent},
         RoomEventType, StateEventType,
     },
-    EventId, MilliSecondsSinceUnixEpoch, OwnedUserId, RoomVersionId,
+    EventId, MilliSecondsSinceUnixEpoch, RoomVersionId,
 };
-use serde::Deserialize;
 use serde_json::from_str as from_json_str;
 use tracing::{debug, info, trace, warn};
 
 mod error;
 pub mod event_auth;
+mod power_levels;
 pub mod room_version;
 mod state_event;
 #[cfg(test)]
@@ -27,6 +27,7 @@ mod test_utils;
 
 pub use error::{Error, Result};
 pub use event_auth::{auth_check, auth_types_for_event};
+use power_levels::PowerLevelsContentFields;
 pub use room_version::RoomVersion;
 pub use state_event::Event;
 
@@ -335,18 +336,6 @@ where
     Ok(sorted)
 }
 
-#[derive(Deserialize)]
-struct PowerLevelsContentFields {
-    #[serde(
-        default,
-        deserialize_with = "ruma_common::serde::btreemap_deserialize_v1_powerlevel_values"
-    )]
-    users: BTreeMap<OwnedUserId, Int>,
-
-    #[serde(default, deserialize_with = "ruma_common::serde::deserialize_v1_powerlevel")]
-    users_default: Int,
-}
-
 /// Find the power level for the sender of `event_id` or return a default value of zero.
 ///
 /// Do NOT use this any where but topological sort, we find the power level for the eventId

crates/ruma-state-res/src/power_levels.rs

@@ -0,0 +1,220 @@
+use std::collections::BTreeMap;
+
+use js_int::Int;
+use ruma_common::{
+    events::{room::power_levels::RoomPowerLevelsEventContent, RoomEventType},
+    power_levels::{default_power_level, NotificationPowerLevels},
+    serde::{btreemap_deserialize_v1_powerlevel_values, deserialize_v1_powerlevel},
+    OwnedUserId,
+};
+use serde::Deserialize;
+use serde_json::{from_str as from_json_str, Error};
+use tracing::error;
+
+use crate::RoomVersion;
+
+#[derive(Deserialize)]
+struct IntRoomPowerLevelsEventContent {
+    #[serde(default = "default_power_level")]
+    pub ban: Int,
+
+    #[serde(default)]
+    pub events: BTreeMap<RoomEventType, Int>,
+
+    #[serde(default)]
+    pub events_default: Int,
+
+    #[serde(default)]
+    pub invite: Int,
+
+    #[serde(default = "default_power_level")]
+    pub kick: Int,
+
+    #[serde(default = "default_power_level")]
+    pub redact: Int,
+
+    #[serde(default = "default_power_level")]
+    pub state_default: Int,
+
+    #[serde(default)]
+    pub users: BTreeMap<OwnedUserId, Int>,
+
+    #[serde(default)]
+    pub users_default: Int,
+
+    #[serde(default)]
+    pub notifications: IntNotificationPowerLevels,
+}
+
+impl From<IntRoomPowerLevelsEventContent> for RoomPowerLevelsEventContent {
+    fn from(int_pl: IntRoomPowerLevelsEventContent) -> Self {
+        let IntRoomPowerLevelsEventContent {
+            ban,
+            events,
+            events_default,
+            invite,
+            kick,
+            redact,
+            state_default,
+            users,
+            users_default,
+            notifications,
+        } = int_pl;
+
+        let mut pl = Self::new();
+        pl.ban = ban;
+        pl.events = events;
+        pl.events_default = events_default;
+        pl.invite = invite;
+        pl.kick = kick;
+        pl.redact = redact;
+        pl.state_default = state_default;
+        pl.users = users;
+        pl.users_default = users_default;
+        pl.notifications = notifications.into();
+
+        pl
+    }
+}
+
+#[derive(Deserialize)]
+struct IntNotificationPowerLevels {
+    #[serde(default = "default_power_level")]
+    pub room: Int,
+}
+
+impl Default for IntNotificationPowerLevels {
+    fn default() -> Self {
+        Self { room: default_power_level() }
+    }
+}
+
+impl From<IntNotificationPowerLevels> for NotificationPowerLevels {
+    fn from(int_notif: IntNotificationPowerLevels) -> Self {
+        let mut notif = Self::new();
+        notif.room = int_notif.room;
+
+        notif
+    }
+}
+
+pub(crate) fn deserialize_power_levels(
+    content: &str,
+    room_version: &RoomVersion,
+) -> Option<RoomPowerLevelsEventContent> {
+    if room_version.integer_power_levels {
+        match from_json_str::<IntRoomPowerLevelsEventContent>(content) {
+            Ok(content) => Some(content.into()),
+            Err(_) => {
+                error!("m.room.power_levels event is not valid with integer values");
+                None
+            }
+        }
+    } else {
+        match from_json_str(content) {
+            Ok(content) => Some(content),
+            Err(_) => {
+                error!(
+                    "m.room.power_levels event is not valid with integer or string integer values"
+                );
+                None
+            }
+        }
+    }
+}
+
+#[derive(Deserialize)]
+pub(crate) struct PowerLevelsContentFields {
+    #[serde(default, deserialize_with = "btreemap_deserialize_v1_powerlevel_values")]
+    pub(crate) users: BTreeMap<OwnedUserId, Int>,
+
+    #[serde(default, deserialize_with = "deserialize_v1_powerlevel")]
+    pub(crate) users_default: Int,
+}
+
+#[derive(Deserialize)]
+struct IntPowerLevelsContentFields {
+    #[serde(default)]
+    users: BTreeMap<OwnedUserId, Int>,
+
+    #[serde(default)]
+    users_default: Int,
+}
+
+impl From<IntPowerLevelsContentFields> for PowerLevelsContentFields {
+    fn from(pl: IntPowerLevelsContentFields) -> Self {
+        let IntPowerLevelsContentFields { users, users_default } = pl;
+        Self { users, users_default }
+    }
+}
+
+pub(crate) fn deserialize_power_levels_content_fields(
+    content: &str,
+    room_version: &RoomVersion,
+) -> Result<PowerLevelsContentFields, Error> {
+    if room_version.integer_power_levels {
+        from_json_str::<IntPowerLevelsContentFields>(content).map(|r| r.into())
+    } else {
+        from_json_str(content)
+    }
+}
+
+#[derive(Deserialize)]
+pub(crate) struct PowerLevelsContentInvite {
+    #[serde(default, deserialize_with = "deserialize_v1_powerlevel")]
+    pub(crate) invite: Int,
+}
+
+#[derive(Deserialize)]
+struct IntPowerLevelsContentInvite {
+    #[serde(default)]
+    invite: Int,
+}
+
+impl From<IntPowerLevelsContentInvite> for PowerLevelsContentInvite {
+    fn from(pl: IntPowerLevelsContentInvite) -> Self {
+        let IntPowerLevelsContentInvite { invite } = pl;
+        Self { invite }
+    }
+}
+
+pub(crate) fn deserialize_power_levels_content_invite(
+    content: &str,
+    room_version: &RoomVersion,
+) -> Result<PowerLevelsContentInvite, Error> {
+    if room_version.integer_power_levels {
+        from_json_str::<IntPowerLevelsContentInvite>(content).map(|r| r.into())
+    } else {
+        from_json_str(content)
+    }
+}
+
+#[derive(Deserialize)]
+pub(crate) struct PowerLevelsContentRedact {
+    #[serde(default = "default_power_level", deserialize_with = "deserialize_v1_powerlevel")]
+    pub(crate) redact: Int,
+}
+
+#[derive(Deserialize)]
+pub(crate) struct IntPowerLevelsContentRedact {
+    #[serde(default = "default_power_level")]
+    redact: Int,
+}
+
+impl From<IntPowerLevelsContentRedact> for PowerLevelsContentRedact {
+    fn from(pl: IntPowerLevelsContentRedact) -> Self {
+        let IntPowerLevelsContentRedact { redact } = pl;
+        Self { redact }
+    }
+}
+
+pub(crate) fn deserialize_power_levels_content_redact(
+    content: &str,
+    room_version: &RoomVersion,
+) -> Result<PowerLevelsContentRedact, Error> {
+    if room_version.integer_power_levels {
+        from_json_str::<IntPowerLevelsContentRedact>(content).map(|r| r.into())
+    } else {
+        from_json_str(content)
+    }
+}