group_propose_add.rs

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// Copyright (c) 2024 Mozilla Corporation and contributors.

// SPDX-License-Identifier: (Apache-2.0 OR MIT)

use mls_platform_api::MessageOrAck;

use mls_platform_api::PlatformError;

use mls_platform_api::Received;

//

// Scenario

//

// * Alice, Bob, Charlie create signing identity (generate_signature_keypair)

// * Alice, Bob, Charlie create credentials (generate_credential_basic)

// * Bob and Charlie create key packages (generate_key_package)

// * Alice creates a group (group_create)

// * Alice adds Bob to the group (group_add)

//   - Alice receives her add commit (receive for commit)

//   - Bob joins the group (group_join)

// * Bob propose to add Charlie to the group

//   - Alice receives the proposal

// * Alice adds Charlie to the group

//   - Bob receives the add commit

//   - Alice receives the add commit

//   - Charlie joins the group

#[test]

fn test_propose_add() -> Result<(), PlatformError> {

    // Default group configuration

    let group_config = mls_platform_api::GroupConfig::default();

    // Storage states

    let mut state_global = mls_platform_api::state_access("global.db", &[0u8; 32])?;

    // Credentials

    let alice_cred = mls_platform_api::mls_generate_credential_basic("alice".as_bytes())?;

    let bob_cred = mls_platform_api::mls_generate_credential_basic("bob".as_bytes())?;

    let charlie_cred = mls_platform_api::mls_generate_credential_basic("charlie".as_bytes())?;

    println!("\nAlice credential: {}", hex::encode(&alice_cred));

    println!("Bob credential: {}", hex::encode(&bob_cred));

    println!("Charlie credential: {}", hex::encode(&charlie_cred));

    // Create signature keypairs and store them in the state

    let alice_id =

        mls_platform_api::mls_generate_signature_keypair(&state_global, group_config.ciphersuite)?;

    let bob_id =

        mls_platform_api::mls_generate_signature_keypair(&state_global, group_config.ciphersuite)?;

    let charlie_id =

        mls_platform_api::mls_generate_signature_keypair(&state_global, group_config.ciphersuite)?;

    println!("\nAlice identifier: {}", hex::encode(&alice_id));

    println!("Bob identifier: {}", hex::encode(&bob_id));

    println!("Charlie identifier: {}", hex::encode(&charlie_id));

    // Create Key Package for Bob

    let bob_kp = mls_platform_api::mls_generate_key_package(

        &state_global,

        &bob_id,

        &bob_cred,

        &Default::default(),

)?;

    // Create Key Package for Charlie

    let charlie_kp = mls_platform_api::mls_generate_key_package(

        &state_global,

        &charlie_id,

        &charlie_cred,

        &Default::default(),

)?;

    // Create a group with Alice

    let gide = mls_platform_api::mls_group_create(

        &mut state_global,

        &alice_id,

        &alice_cred,

        None,

        None,

        &Default::default(),

)?;

    println!("\nGroup created by Alice: {}", hex::encode(&gide.group_id));

    // List the members of the group

    let members = mls_platform_api::mls_group_members(&state_global, &gide.group_id, &alice_id)?;

    println!("Members (alice, before adding bob): {members:?}");

//

    // Alice adds Bob to a group

//

    println!("\nAlice adds Bob to the Group");

    let commit_output = mls_platform_api::mls_group_add(

        &mut state_global,

        &gide.group_id,

        &alice_id,

        vec![bob_kp],

)?;

    let welcome = commit_output

        .welcome

        .first()

        .expect("No welcome messages found")

        .clone();

    // Alice process her own commit

    println!("\nAlice process her commit to add Bob to the Group");

    mls_platform_api::mls_receive(

        &state_global,

        &alice_id,

        &MessageOrAck::MlsMessage(commit_output.commit.clone()),

)?;

    // List the members of the group

    let members = mls_platform_api::mls_group_members(&state_global, &gide.group_id, &alice_id)?;

    println!("Members (alice, after adding bob): {members:?}");

    // Bob joins

    println!("\nBob joins the group created by Alice");

    mls_platform_api::mls_group_join(&state_global, &bob_id, &welcome, None)?;

    // List the members of the group

    let members = mls_platform_api::mls_group_members(&state_global, &gide.group_id, &bob_id)?;

    println!("Members (bob, after joining the group): {members:?}");

//

    // Bob propose to add Charlie

//

    println!("\nBob proposes to add Charlie to the Group");

    let proposal_add_bytes = mls_platform_api::mls_group_propose_add(

        &mut state_global,

        &gide.group_id,

        &bob_id,

        charlie_kp,

)?;

    // Alice receives the Add proposal and commits to it

    println!("\nAlice commits to the add");

    let recv_commit_output_5 = mls_platform_api::mls_receive(

        &state_global,

        &alice_id,

        &MessageOrAck::MlsMessage(proposal_add_bytes.clone()),

)?;

    let (_, Received::CommitOutput(commit_output_5)) = recv_commit_output_5 else {

        panic!("Expected a different type.");

};

    // Bobs process the commit

    println!("\nBob receives the commit");

    mls_platform_api::mls_receive(

        &state_global,

        &bob_id,

        &MessageOrAck::MlsMessage(commit_output_5.commit.clone()),

)?;

    // List the members of the group

    let members_bob = mls_platform_api::mls_group_members(&state_global, &gide.group_id, &bob_id)?;

    println!("Members (bob, after adding charlie): {members_bob:?}");

    // Alice receives the commit

    println!("\nAlice receives the commit");

    mls_platform_api::mls_receive(

        &state_global,

        &alice_id,

        &MessageOrAck::MlsMessage(commit_output_5.commit.clone()),

)?;

    // List the members of the group

    let members_alice =

        mls_platform_api::mls_group_members(&state_global, &gide.group_id, &alice_id)?;

    println!("Members (alice, after adding charlie): {members_alice:?}");

    // Extract the welcome from the commit output

    let welcome_5 = commit_output_5

        .welcome

        .first()

        .expect("No welcome messages found")

        .clone();

    // Charlie joins

    println!("\nCharlie joins the group");

    mls_platform_api::mls_group_join(&state_global, &charlie_id, &welcome_5, None)?;

    // List the members of the group

    let members_charlie =

        mls_platform_api::mls_group_members(&state_global, &gide.group_id, &charlie_id)?;

    println!("Members (charlie, after joining the group): {members_charlie:?}");

    // Test that Alice, Bob and Charlie are in the same group

    assert!(members_alice == members_bob);

    assert!(members_bob == members_charlie);

    Ok(())