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| 1 | +// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. |
| 2 | +// Copyright by contributors to this project. |
| 3 | +// SPDX-License-Identifier: (Apache-2.0 OR MIT) |
| 4 | + |
| 5 | +use std::convert::Infallible; |
| 6 | + |
| 7 | +use mls_rs::{ |
| 8 | + client_builder::MlsConfig, |
| 9 | + error::MlsError, |
| 10 | + identity::{ |
| 11 | + basic::{BasicCredential, BasicIdentityProvider}, |
| 12 | + SigningIdentity, |
| 13 | + }, |
| 14 | + CipherSuite, CipherSuiteProvider, Client, CryptoProvider, ExtensionList, KeyPackageStorage, |
| 15 | +}; |
| 16 | +use mls_rs_core::key_package::KeyPackageData; |
| 17 | + |
| 18 | +const CIPHERSUITE: CipherSuite = CipherSuite::CURVE25519_AES128; |
| 19 | + |
| 20 | +fn main() -> Result<(), MlsError> { |
| 21 | + let crypto_provider = mls_rs_crypto_openssl::OpensslCryptoProvider::default(); |
| 22 | + |
| 23 | + // Create clients for Alice and Bob |
| 24 | + let alice = make_client(crypto_provider.clone(), "alice")?; |
| 25 | + let bob = make_client(crypto_provider.clone(), "bob")?; |
| 26 | + |
| 27 | + // Bob generates key package. We store secrets in memory, no need for any storage. |
| 28 | + let key_package_generation = bob |
| 29 | + .key_package_builder(CIPHERSUITE)? |
| 30 | + .valid_for_sec(123) |
| 31 | + .build()?; |
| 32 | + |
| 33 | + let stored_secrets = key_package_generation.key_package_data; |
| 34 | + |
| 35 | + // Alice creates a group with Bob. |
| 36 | + let mut alice_group = alice.create_group(ExtensionList::default(), Default::default())?; |
| 37 | + |
| 38 | + let welcomes = alice_group |
| 39 | + .commit_builder() |
| 40 | + .add_member(key_package_generation.key_package_message)? |
| 41 | + .build()? |
| 42 | + .welcome_messages; |
| 43 | + |
| 44 | + alice_group.apply_pending_commit()?; |
| 45 | + |
| 46 | + // Bob joins |
| 47 | + let mut bob_group = bob.group_joiner(&welcomes[0], stored_secrets)?.join()?.0; |
| 48 | + |
| 49 | + // Alice and bob can chat |
| 50 | + let msg = alice_group.encrypt_application_message(b"hello world", Default::default())?; |
| 51 | + let msg = bob_group.process_incoming_message(msg)?; |
| 52 | + |
| 53 | + println!("Received message: {:?}", msg); |
| 54 | + |
| 55 | + Ok(()) |
| 56 | +} |
| 57 | + |
| 58 | +#[derive(Clone)] |
| 59 | +struct NoOpKeyPackageStorage; |
| 60 | + |
| 61 | +impl KeyPackageStorage for NoOpKeyPackageStorage { |
| 62 | + type Error = Infallible; |
| 63 | + |
| 64 | + fn delete(&mut self, _: &[u8]) -> Result<(), Infallible> { |
| 65 | + Ok(()) |
| 66 | + } |
| 67 | + |
| 68 | + fn get(&self, _: &[u8]) -> Result<Option<KeyPackageData>, Infallible> { |
| 69 | + Ok(None) |
| 70 | + } |
| 71 | + |
| 72 | + fn insert(&mut self, _: Vec<u8>, _: KeyPackageData) -> Result<(), Infallible> { |
| 73 | + Ok(()) |
| 74 | + } |
| 75 | +} |
| 76 | + |
| 77 | +fn make_client<P: CryptoProvider + Clone>( |
| 78 | + crypto_provider: P, |
| 79 | + name: &str, |
| 80 | +) -> Result<Client<impl MlsConfig>, MlsError> { |
| 81 | + let cipher_suite = crypto_provider.cipher_suite_provider(CIPHERSUITE).unwrap(); |
| 82 | + let (secret, public) = cipher_suite.signature_key_generate().unwrap(); |
| 83 | + let basic_identity = BasicCredential::new(name.as_bytes().to_vec()); |
| 84 | + let signing_identity = SigningIdentity::new(basic_identity.into_credential(), public); |
| 85 | + |
| 86 | + Ok(Client::builder() |
| 87 | + .identity_provider(BasicIdentityProvider) |
| 88 | + .crypto_provider(crypto_provider) |
| 89 | + .signing_identity(signing_identity, secret, CIPHERSUITE) |
| 90 | + .key_package_repo(NoOpKeyPackageStorage) |
| 91 | + .build()) |
| 92 | +} |
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