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configuration.rs
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use crate::room_state::member::MemberId;
use crate::room_state::ChatRoomParametersV1;
use crate::util::truncated_base64;
use crate::ChatRoomStateV1;
use ed25519_dalek::{Signature, SignatureError, Signer, SigningKey, Verifier, VerifyingKey};
use freenet_scaffold::util::{fast_hash, FastHash};
use freenet_scaffold::ComposableState;
use serde::{Deserialize, Serialize};
use std::fmt;
#[derive(Serialize, Deserialize, Clone, PartialEq)]
pub struct AuthorizedConfigurationV1 {
pub configuration: Configuration,
pub signature: Signature,
}
impl ComposableState for AuthorizedConfigurationV1 {
type ParentState = ChatRoomStateV1;
type Summary = u32;
type Delta = AuthorizedConfigurationV1;
type Parameters = ChatRoomParametersV1;
fn verify(
&self,
_parent_state: &Self::ParentState,
parameters: &Self::Parameters,
) -> Result<(), String> {
self.verify_signature(¶meters.owner)
.map_err(|e| format!("Invalid signature: {}", e))
}
fn summarize(
&self,
_parent_state: &Self::ParentState,
_parameters: &Self::Parameters,
) -> Self::Summary {
self.configuration.configuration_version
}
fn delta(
&self,
_parent_state: &Self::ParentState,
_parameters: &Self::Parameters,
old_version: &Self::Summary,
) -> Option<Self::Delta> {
if self.configuration.configuration_version > *old_version {
Some(self.clone())
} else {
None
}
}
fn apply_delta(
&mut self,
_parent_state: &Self::ParentState,
parameters: &Self::Parameters,
delta: &Option<Self::Delta>,
) -> Result<(), String> {
if let Some(delta) = delta {
// Verify the delta's signature
delta
.verify_signature(¶meters.owner)
.map_err(|e| format!("Invalid signature: {}", e))?;
// Check if the new version is greater than the current version
if delta.configuration.configuration_version <= self.configuration.configuration_version
{
return Err(
"New configuration version must be greater than the current version"
.to_string(),
);
}
// Verify that the owner_member_id hasn't changed
if delta.configuration.owner_member_id != self.configuration.owner_member_id {
return Err("Cannot change the owner_member_id".to_string());
}
// Verify that the new configuration is valid
if delta.configuration.max_recent_messages == 0
|| delta.configuration.max_user_bans == 0
|| delta.configuration.max_message_size == 0
|| delta.configuration.max_nickname_size == 0
|| delta.configuration.max_members == 0
{
return Err("Invalid configuration values".to_string());
}
// If all checks pass, apply the delta
self.configuration = delta.configuration.clone();
self.signature = delta.signature;
}
Ok(())
}
}
impl AuthorizedConfigurationV1 {
pub fn new(configuration: Configuration, owner_signing_key: &SigningKey) -> Self {
let mut serialized_config = Vec::new();
ciborium::ser::into_writer(&configuration, &mut serialized_config)
.expect("Serialization should not fail");
let signature = owner_signing_key.sign(&serialized_config);
Self {
configuration,
signature,
}
}
pub fn verify_signature(
&self,
owner_verifying_key: &VerifyingKey,
) -> Result<(), SignatureError> {
let mut serialized_config = Vec::new();
ciborium::ser::into_writer(&self.configuration, &mut serialized_config)
.expect("Serialization should not fail");
owner_verifying_key.verify(&serialized_config, &self.signature)
}
pub fn id(&self) -> FastHash {
fast_hash(&self.signature.to_bytes())
}
}
impl Default for AuthorizedConfigurationV1 {
fn default() -> Self {
let default_config = Configuration::default();
let default_key = SigningKey::from_bytes(&[0; 32]);
Self::new(default_config, &default_key)
}
}
impl Default for Configuration {
fn default() -> Self {
Configuration {
owner_member_id: MemberId(FastHash(0)), // Default value, should be overwritten
configuration_version: 1,
name: "Default Room Name".to_string(),
max_recent_messages: 100,
max_user_bans: 10,
max_message_size: 1000,
max_nickname_size: 50,
max_members: 200,
}
}
}
impl fmt::Debug for AuthorizedConfigurationV1 {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("AuthorizedConfiguration")
.field("configuration", &self.configuration)
.field(
"signature",
&format_args!("{}", truncated_base64(self.signature.to_bytes())),
)
.finish()
}
}
#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
pub struct Configuration {
pub owner_member_id: MemberId,
pub configuration_version: u32,
pub name: String,
pub max_recent_messages: usize,
pub max_user_bans: usize,
pub max_message_size: usize,
pub max_nickname_size: usize,
pub max_members: usize,
}
#[cfg(test)]
mod tests {
use super::*;
use rand::rngs::OsRng;
#[test]
fn test_verify() {
let owner_signing_key = SigningKey::generate(&mut OsRng);
let owner_verifying_key = VerifyingKey::from(&owner_signing_key);
let configuration = Configuration::default();
let authorized_configuration =
AuthorizedConfigurationV1::new(configuration.clone(), &owner_signing_key);
assert!(authorized_configuration
.verify_signature(&owner_verifying_key)
.is_ok());
let parent_state = ChatRoomStateV1 {
configuration: authorized_configuration.clone(),
..ChatRoomStateV1::default()
};
let parameters = ChatRoomParametersV1 {
owner: owner_verifying_key,
};
assert!(authorized_configuration
.verify(&parent_state, ¶meters)
.is_ok());
}
#[test]
fn test_verify_fail() {
let owner_signing_key = SigningKey::generate(&mut OsRng);
let owner_verifying_key = VerifyingKey::from(&owner_signing_key);
let configuration = Configuration::default();
let authorized_configuration =
AuthorizedConfigurationV1::new(configuration.clone(), &owner_signing_key);
let wrong_owner_signing_key = SigningKey::generate(&mut OsRng);
let wrong_owner_verifying_key = VerifyingKey::from(&wrong_owner_signing_key);
assert!(authorized_configuration
.verify_signature(&wrong_owner_verifying_key)
.is_err());
let parent_state = ChatRoomStateV1 {
configuration: authorized_configuration.clone(),
..ChatRoomStateV1::default()
};
let parameters = ChatRoomParametersV1 {
owner: wrong_owner_verifying_key,
};
assert!(authorized_configuration
.verify(&parent_state, ¶meters)
.is_err());
}
#[test]
fn test_summarize() {
let owner_signing_key = SigningKey::generate(&mut OsRng);
let owner_verifying_key = VerifyingKey::from(&owner_signing_key);
let configuration = Configuration::default();
let authorized_configuration =
AuthorizedConfigurationV1::new(configuration.clone(), &owner_signing_key);
let mut parent_state = ChatRoomStateV1::default();
parent_state.configuration = authorized_configuration.clone();
let parameters = ChatRoomParametersV1 {
owner: owner_verifying_key,
};
assert_eq!(
authorized_configuration.summarize(&parent_state, ¶meters),
configuration.configuration_version
);
}
#[test]
fn test_delta_new_version() {
let owner_signing_key = SigningKey::generate(&mut OsRng);
let owner_verifying_key = VerifyingKey::from(&owner_signing_key);
let configuration = Configuration::default();
let authorized_configuration =
AuthorizedConfigurationV1::new(configuration.clone(), &owner_signing_key);
let mut parent_state = ChatRoomStateV1::default();
parent_state.configuration = authorized_configuration.clone();
let parameters = ChatRoomParametersV1 {
owner: owner_verifying_key,
};
let new_configuration = Configuration {
configuration_version: 2,
..configuration.clone()
};
let new_authorized_configuration =
AuthorizedConfigurationV1::new(new_configuration.clone(), &owner_signing_key);
assert_eq!(
new_authorized_configuration.delta(&parent_state, ¶meters, &1),
Some(new_authorized_configuration)
);
}
#[test]
fn test_delta_older_version() {
let owner_signing_key = SigningKey::generate(&mut OsRng);
let owner_verifying_key = VerifyingKey::from(&owner_signing_key);
// Create an older configuration (version 1)
let old_configuration = Configuration {
configuration_version: 1,
..Configuration::default()
};
let old_authorized_configuration =
AuthorizedConfigurationV1::new(old_configuration.clone(), &owner_signing_key);
let mut parent_state = ChatRoomStateV1::default();
parent_state.configuration = old_authorized_configuration.clone();
let parameters = ChatRoomParametersV1 {
owner: owner_verifying_key,
};
// Test against a newer version (2)
// The delta should return None since our configuration is older
assert_eq!(
old_authorized_configuration.delta(&parent_state, ¶meters, &2),
None
);
}
#[test]
fn test_apply_delta_should_apply() {
let owner_signing_key = SigningKey::generate(&mut OsRng);
let owner_verifying_key = VerifyingKey::from(&owner_signing_key);
let configuration = Configuration::default();
let mut authorized_configuration =
AuthorizedConfigurationV1::new(configuration.clone(), &owner_signing_key);
let mut parent_state = ChatRoomStateV1::default();
parent_state.configuration = authorized_configuration.clone();
let parameters = ChatRoomParametersV1 {
owner: owner_verifying_key,
};
let new_configuration = Configuration {
configuration_version: 2,
..configuration.clone()
};
let new_authorized_configuration =
AuthorizedConfigurationV1::new(new_configuration.clone(), &owner_signing_key);
authorized_configuration
.apply_delta(
&parent_state,
¶meters,
&Some(new_authorized_configuration.clone()),
)
.unwrap();
assert_eq!(authorized_configuration, new_authorized_configuration);
}
#[test]
fn test_apply_delta_old_version() {
let owner_signing_key = SigningKey::generate(&mut OsRng);
let owner_verifying_key = VerifyingKey::from(&owner_signing_key);
let configuration = Configuration::default();
let mut authorized_configuration =
AuthorizedConfigurationV1::new(configuration.clone(), &owner_signing_key);
let orig_authorized_configuration = authorized_configuration.clone();
let mut parent_state = ChatRoomStateV1::default();
parent_state.configuration = authorized_configuration.clone();
let parameters = ChatRoomParametersV1 {
owner: owner_verifying_key,
};
let new_configuration = Configuration {
configuration_version: 0,
..configuration.clone()
};
let new_authorized_configuration =
AuthorizedConfigurationV1::new(new_configuration.clone(), &owner_signing_key);
let result = authorized_configuration.apply_delta(
&parent_state,
¶meters,
&Some(new_authorized_configuration),
);
assert!(result.is_err());
assert_eq!(
result.unwrap_err(),
"New configuration version must be greater than the current version"
);
assert_eq!(authorized_configuration, orig_authorized_configuration);
}
#[test]
fn test_apply_delta_change_owner() {
let owner_signing_key = SigningKey::generate(&mut OsRng);
let owner_verifying_key = VerifyingKey::from(&owner_signing_key);
let configuration = Configuration {
owner_member_id: MemberId(FastHash(1)),
..Configuration::default()
};
let mut authorized_configuration =
AuthorizedConfigurationV1::new(configuration.clone(), &owner_signing_key);
let mut parent_state = ChatRoomStateV1::default();
parent_state.configuration = authorized_configuration.clone();
let parameters = ChatRoomParametersV1 {
owner: owner_verifying_key,
};
let mut new_configuration = configuration.clone();
new_configuration.configuration_version += 1;
new_configuration.owner_member_id = MemberId(FastHash(2));
let new_authorized_configuration =
AuthorizedConfigurationV1::new(new_configuration, &owner_signing_key);
let result = authorized_configuration.apply_delta(
&parent_state,
¶meters,
&Some(new_authorized_configuration),
);
assert!(result.is_err());
assert_eq!(result.unwrap_err(), "Cannot change the owner_member_id");
}
#[test]
fn test_apply_delta_invalid_values() {
let owner_signing_key = SigningKey::generate(&mut OsRng);
let owner_verifying_key = VerifyingKey::from(&owner_signing_key);
let configuration = Configuration::default();
let mut authorized_configuration =
AuthorizedConfigurationV1::new(configuration.clone(), &owner_signing_key);
let mut parent_state = ChatRoomStateV1::default();
parent_state.configuration = authorized_configuration.clone();
let parameters = ChatRoomParametersV1 {
owner: owner_verifying_key,
};
let mut new_configuration = configuration.clone();
new_configuration.configuration_version += 1;
new_configuration.max_recent_messages = 0;
let new_authorized_configuration =
AuthorizedConfigurationV1::new(new_configuration, &owner_signing_key);
let result = authorized_configuration.apply_delta(
&parent_state,
¶meters,
&Some(new_authorized_configuration),
);
assert!(result.is_err());
assert_eq!(result.unwrap_err(), "Invalid configuration values");
}
}