core_crypto/mls/session/
key_package.rs

1use openmls::prelude::{Credential, CredentialWithKey, CryptoConfig, KeyPackage, KeyPackageRef, Lifetime};
2use openmls_traits::OpenMlsCryptoProvider;
3use std::collections::HashMap;
4use std::ops::DerefMut;
5use tls_codec::{Deserialize, Serialize};
6
7use core_crypto_keystore::{
8    connection::FetchFromDatabase,
9    entities::{EntityFindParams, MlsEncryptionKeyPair, MlsHpkePrivateKey, MlsKeyPackage},
10};
11use mls_crypto_provider::{CryptoKeystore, MlsCryptoProvider};
12
13use super::{Error, Result};
14use crate::{
15    KeystoreError, MlsError,
16    mls::{credential::CredentialBundle, session::SessionInner},
17    prelude::{MlsCiphersuite, MlsConversationConfiguration, MlsCredentialType, Session},
18};
19
20/// Default number of KeyPackages a client generates the first time it's created
21#[cfg(not(test))]
22pub const INITIAL_KEYING_MATERIAL_COUNT: usize = 100;
23/// Default number of KeyPackages a client generates the first time it's created
24#[cfg(test)]
25pub const INITIAL_KEYING_MATERIAL_COUNT: usize = 10;
26
27/// Default lifetime of all generated KeyPackages. Matches the limit defined in openmls
28pub(crate) const KEYPACKAGE_DEFAULT_LIFETIME: std::time::Duration =
29    std::time::Duration::from_secs(60 * 60 * 24 * 28 * 3); // ~3 months
30
31impl Session {
32    /// Generates a single new keypackage
33    ///
34    /// # Arguments
35    /// * `backend` - the KeyStorage to load the keypackages from
36    ///
37    /// # Errors
38    /// KeyStore and OpenMls errors
39    pub async fn generate_one_keypackage_from_credential_bundle(
40        &self,
41        backend: &MlsCryptoProvider,
42        cs: MlsCiphersuite,
43        cb: &CredentialBundle,
44    ) -> Result<KeyPackage> {
45        let guard = self.inner.read().await;
46        let SessionInner {
47            keypackage_lifetime, ..
48        } = guard.as_ref().ok_or(Error::MlsNotInitialized)?;
49
50        let keypackage = KeyPackage::builder()
51            .leaf_node_capabilities(MlsConversationConfiguration::default_leaf_capabilities())
52            .key_package_lifetime(Lifetime::new(keypackage_lifetime.as_secs()))
53            .build(
54                CryptoConfig {
55                    ciphersuite: cs.into(),
56                    version: openmls::versions::ProtocolVersion::default(),
57                },
58                backend,
59                &cb.signature_key,
60                CredentialWithKey {
61                    credential: cb.credential.clone(),
62                    signature_key: cb.signature_key.public().into(),
63                },
64            )
65            .await
66            .map_err(KeystoreError::wrap("building keypackage"))?;
67
68        Ok(keypackage)
69    }
70
71    /// Requests `count` keying material to be present and returns
72    /// a reference to it for the consumer to copy/clone.
73    ///
74    /// # Arguments
75    /// * `count` - number of [openmls::key_packages::KeyPackage] to generate
76    /// * `ciphersuite` - of [openmls::key_packages::KeyPackage] to generate
77    /// * `backend` - the KeyStorage to load the keypackages from
78    ///
79    /// # Errors
80    /// KeyStore and OpenMls errors
81    pub async fn request_key_packages(
82        &self,
83        count: usize,
84        ciphersuite: MlsCiphersuite,
85        credential_type: MlsCredentialType,
86        backend: &MlsCryptoProvider,
87    ) -> Result<Vec<KeyPackage>> {
88        // Auto-prune expired keypackages on request
89        self.prune_keypackages(backend, &[]).await?;
90        use core_crypto_keystore::CryptoKeystoreMls as _;
91
92        let mut existing_kps = backend
93            .key_store()
94            .mls_fetch_keypackages::<KeyPackage>(count as u32)
95            .await.map_err(KeystoreError::wrap("fetching mls keypackages"))?
96            .into_iter()
97            // TODO: do this filtering in SQL when the schema is updated. Tracking issue: WPB-9599
98            .filter(|kp|
99                kp.ciphersuite() == ciphersuite.0 && MlsCredentialType::from(kp.leaf_node().credential().credential_type()) == credential_type)
100            .collect::<Vec<_>>();
101
102        let kpb_count = existing_kps.len();
103        let mut kps = if count > kpb_count {
104            let to_generate = count - kpb_count;
105            let cb = self
106                .find_most_recent_credential_bundle(ciphersuite.signature_algorithm(), credential_type)
107                .await?;
108            self.generate_new_keypackages(backend, ciphersuite, &cb, to_generate)
109                .await?
110        } else {
111            vec![]
112        };
113
114        existing_kps.reverse();
115
116        kps.append(&mut existing_kps);
117        Ok(kps)
118    }
119
120    pub(crate) async fn generate_new_keypackages(
121        &self,
122        backend: &MlsCryptoProvider,
123        ciphersuite: MlsCiphersuite,
124        cb: &CredentialBundle,
125        count: usize,
126    ) -> Result<Vec<KeyPackage>> {
127        let mut kps = Vec::with_capacity(count);
128
129        for _ in 0..count {
130            let kp = self
131                .generate_one_keypackage_from_credential_bundle(backend, ciphersuite, cb)
132                .await?;
133            kps.push(kp);
134        }
135
136        Ok(kps)
137    }
138
139    /// Returns the count of valid, non-expired, unclaimed keypackages in store
140    pub async fn valid_keypackages_count(
141        &self,
142        backend: &MlsCryptoProvider,
143        ciphersuite: MlsCiphersuite,
144        credential_type: MlsCredentialType,
145    ) -> Result<usize> {
146        let kps: Vec<MlsKeyPackage> = backend
147            .key_store()
148            .find_all(EntityFindParams::default())
149            .await
150            .map_err(KeystoreError::wrap("finding all key packages"))?;
151
152        let mut valid_count = 0;
153        for kp in kps
154            .into_iter()
155            .map(|kp| core_crypto_keystore::deser::<KeyPackage>(&kp.keypackage))
156            // TODO: do this filtering in SQL when the schema is updated. Tracking issue: WPB-9599
157            .filter(|kp| {
158                kp.as_ref()
159                    .map(|b| b.ciphersuite() == ciphersuite.0 && MlsCredentialType::from(b.leaf_node().credential().credential_type()) == credential_type)
160                    .unwrap_or_default()
161            })
162        {
163            let kp = kp.map_err(KeystoreError::wrap("counting valid keypackages"))?;
164            if !Self::is_mls_keypackage_expired(&kp) {
165                valid_count += 1;
166            }
167        }
168
169        Ok(valid_count)
170    }
171
172    /// Checks if a given OpenMLS [`KeyPackage`] is expired by looking through its extensions,
173    /// finding a lifetime extension and checking if it's valid.
174    fn is_mls_keypackage_expired(kp: &KeyPackage) -> bool {
175        let Some(lifetime) = kp.leaf_node().life_time() else {
176            return false;
177        };
178
179        !(lifetime.has_acceptable_range() && lifetime.is_valid())
180    }
181
182    /// Prune the provided KeyPackageRefs from the keystore
183    ///
184    /// Warning: Despite this API being public, the caller should know what they're doing.
185    /// Provided KeypackageRefs **will** be purged regardless of their expiration state, so please be wary of what you are doing if you directly call this API.
186    /// This could result in still valid, uploaded keypackages being pruned from the system and thus being impossible to find when referenced in a future Welcome message.
187    pub async fn prune_keypackages(&self, backend: &MlsCryptoProvider, refs: &[KeyPackageRef]) -> Result<()> {
188        let keystore = backend.keystore();
189        let kps = self.find_all_keypackages(&keystore).await?;
190        let _ = self._prune_keypackages(&kps, &keystore, refs).await?;
191        Ok(())
192    }
193
194    pub(crate) async fn prune_keypackages_and_credential(
195        &mut self,
196        backend: &MlsCryptoProvider,
197        refs: &[KeyPackageRef],
198    ) -> Result<()> {
199        match self.inner.write().await.deref_mut() {
200            None => Err(Error::MlsNotInitialized),
201            Some(SessionInner { identities, .. }) => {
202                let keystore = backend.key_store();
203                let kps = self.find_all_keypackages(keystore).await?;
204                let kp_to_delete = self._prune_keypackages(&kps, keystore, refs).await?;
205
206                // Let's group KeyPackages by Credential
207                let mut grouped_kps = HashMap::<Vec<u8>, Vec<KeyPackageRef>>::new();
208                for (_, kp) in &kps {
209                    let cred = kp
210                        .leaf_node()
211                        .credential()
212                        .tls_serialize_detached()
213                        .map_err(Error::tls_serialize("keypackage"))?;
214                    let kp_ref = kp
215                        .hash_ref(backend.crypto())
216                        .map_err(MlsError::wrap("computing keypackage hashref"))?;
217                    grouped_kps
218                        .entry(cred)
219                        .and_modify(|kprfs| kprfs.push(kp_ref.clone()))
220                        .or_insert(vec![kp_ref]);
221                }
222
223                for (credential, kps) in &grouped_kps {
224                    // If all KeyPackages are to be deleted for this given Credential
225                    let all_to_delete = kps.iter().all(|kpr| kp_to_delete.contains(&kpr.as_slice()));
226                    if all_to_delete {
227                        // then delete this Credential
228                        backend
229                            .keystore()
230                            .cred_delete_by_credential(credential.clone())
231                            .await
232                            .map_err(KeystoreError::wrap("deleting credential"))?;
233                        let credential = Credential::tls_deserialize(&mut credential.as_slice())
234                            .map_err(Error::tls_deserialize("credential"))?;
235                        identities.remove(&credential).await?;
236                    }
237                }
238                Ok(())
239            }
240        }
241    }
242
243    /// Deletes all expired KeyPackages plus the ones in `refs`. It also deletes all associated:
244    /// * HPKE private keys
245    /// * HPKE Encryption KeyPairs
246    /// * Signature KeyPairs & Credentials (use [Self::prune_keypackages_and_credential])
247    async fn _prune_keypackages<'a>(
248        &self,
249        kps: &'a [(MlsKeyPackage, KeyPackage)],
250        keystore: &CryptoKeystore,
251        refs: &[KeyPackageRef],
252    ) -> Result<Vec<&'a [u8]>, Error> {
253        let kp_to_delete: Vec<_> = kps
254            .iter()
255            .filter_map(|(store_kp, kp)| {
256                let is_expired = Self::is_mls_keypackage_expired(kp);
257                let mut to_delete = is_expired;
258                if !(is_expired || refs.is_empty()) {
259                    // not expired and there are some refs to check
260                    // then delete it when it's found in the refs
261                    to_delete = refs.iter().any(|r| r.as_slice() == store_kp.keypackage_ref);
262                }
263
264                to_delete.then_some((kp, &store_kp.keypackage_ref))
265            })
266            .collect();
267
268        for (kp, kp_ref) in &kp_to_delete {
269            // TODO: maybe rewrite this to optimize it. But honestly it's called so rarely and on a so tiny amount of data. Tacking issue: WPB-9600
270            keystore
271                .remove::<MlsKeyPackage, &[u8]>(kp_ref.as_slice())
272                .await
273                .map_err(KeystoreError::wrap("removing key package from keystore"))?;
274            keystore
275                .remove::<MlsHpkePrivateKey, &[u8]>(kp.hpke_init_key().as_slice())
276                .await
277                .map_err(KeystoreError::wrap("removing private key from keystore"))?;
278            keystore
279                .remove::<MlsEncryptionKeyPair, &[u8]>(kp.leaf_node().encryption_key().as_slice())
280                .await
281                .map_err(KeystoreError::wrap("removing encryption keypair from keystore"))?;
282        }
283
284        let kp_to_delete = kp_to_delete
285            .into_iter()
286            .map(|(_, kpref)| &kpref[..])
287            .collect::<Vec<_>>();
288
289        Ok(kp_to_delete)
290    }
291
292    async fn find_all_keypackages(&self, keystore: &CryptoKeystore) -> Result<Vec<(MlsKeyPackage, KeyPackage)>> {
293        let kps: Vec<MlsKeyPackage> = keystore
294            .find_all(EntityFindParams::default())
295            .await
296            .map_err(KeystoreError::wrap("finding all keypackages"))?;
297
298        let kps = kps
299            .into_iter()
300            .map(|raw_kp| -> Result<_> {
301                let kp = core_crypto_keystore::deser::<KeyPackage>(&raw_kp.keypackage)
302                    .map_err(KeystoreError::wrap("deserializing keypackage"))?;
303                Ok((raw_kp, kp))
304            })
305            .collect::<Result<Vec<_>, _>>()?;
306
307        Ok(kps)
308    }
309
310    /// Allows to set the current default keypackage lifetime extension duration.
311    /// It will be embedded in the [openmls::key_packages::KeyPackage]'s [openmls::extensions::LifetimeExtension]
312    #[cfg(test)]
313    pub async fn set_keypackage_lifetime(&self, duration: std::time::Duration) -> Result<()> {
314        use std::ops::DerefMut;
315        match self.inner.write().await.deref_mut() {
316            None => Err(Error::MlsNotInitialized),
317            Some(SessionInner {
318                keypackage_lifetime, ..
319            }) => {
320                *keypackage_lifetime = duration;
321                Ok(())
322            }
323        }
324    }
325}
326
327#[cfg(test)]
328mod tests {
329    use openmls::prelude::{KeyPackage, KeyPackageIn, KeyPackageRef, ProtocolVersion};
330    use openmls_traits::OpenMlsCryptoProvider;
331    use openmls_traits::types::VerifiableCiphersuite;
332    use wasm_bindgen_test::*;
333
334    use mls_crypto_provider::MlsCryptoProvider;
335
336    use crate::e2e_identity::enrollment::test_utils::{e2ei_enrollment, init_activation_or_rotation, noop_restore};
337    use crate::prelude::MlsConversationConfiguration;
338    use crate::prelude::key_package::INITIAL_KEYING_MATERIAL_COUNT;
339    use crate::test_utils::*;
340    use core_crypto_keystore::DatabaseKey;
341
342    use super::Session;
343
344    wasm_bindgen_test_configure!(run_in_browser);
345
346    #[apply(all_cred_cipher)]
347    #[wasm_bindgen_test]
348    async fn can_assess_keypackage_expiration(case: TestContext) {
349        let [session] = case.sessions().await;
350        let (cs, ct) = (case.ciphersuite(), case.credential_type);
351        let key = DatabaseKey::generate();
352        let backend = MlsCryptoProvider::try_new_in_memory(&key).await.unwrap();
353        let x509_test_chain = if case.is_x509() {
354            let x509_test_chain = crate::test_utils::x509::X509TestChain::init_empty(case.signature_scheme());
355            x509_test_chain.register_with_provider(&backend).await;
356            Some(x509_test_chain)
357        } else {
358            None
359        };
360
361        backend.new_transaction().await.unwrap();
362        let session = session.session;
363        session
364            .random_generate(
365                &case,
366                x509_test_chain.as_ref().map(|chain| chain.find_local_intermediate_ca()),
367                false,
368            )
369            .await
370            .unwrap();
371
372        // 90-day standard expiration
373        let kp_std_exp = session.generate_one_keypackage(&backend, cs, ct).await.unwrap();
374        assert!(!Session::is_mls_keypackage_expired(&kp_std_exp));
375
376        // 1-second expiration
377        session
378            .set_keypackage_lifetime(std::time::Duration::from_secs(1))
379            .await
380            .unwrap();
381        let kp_1s_exp = session.generate_one_keypackage(&backend, cs, ct).await.unwrap();
382        // Sleep 2 seconds to make sure we make the kp expire
383        async_std::task::sleep(std::time::Duration::from_secs(2)).await;
384        assert!(Session::is_mls_keypackage_expired(&kp_1s_exp));
385    }
386
387    #[apply(all_cred_cipher)]
388    #[wasm_bindgen_test]
389    async fn requesting_x509_key_packages_after_basic(case: TestContext) {
390        // Basic test case
391        if !case.is_basic() {
392            return;
393        }
394
395        let [mut session_context] = case.sessions().await;
396        Box::pin(async move {
397            let signature_scheme = case.signature_scheme();
398            let cipher_suite = case.ciphersuite();
399
400            // Generate 5 Basic key packages first
401            let _basic_key_packages = session_context
402                .transaction
403                .get_or_create_client_keypackages(cipher_suite, MlsCredentialType::Basic, 5)
404                .await
405                .unwrap();
406
407            // Set up E2E identity
408            let test_chain = x509::X509TestChain::init_for_random_clients(signature_scheme, 1);
409
410            let (mut enrollment, cert_chain) = e2ei_enrollment(
411                &mut session_context,
412                &case,
413                &test_chain,
414                None,
415                false,
416                init_activation_or_rotation,
417                noop_restore,
418            )
419            .await
420            .unwrap();
421
422            let _rotate_bundle = session_context
423                .transaction
424                .save_x509_credential(&mut enrollment, cert_chain)
425                .await
426                .unwrap();
427
428            // E2E identity has been set up correctly
429            assert!(
430                session_context
431                    .transaction
432                    .e2ei_is_enabled(signature_scheme)
433                    .await
434                    .unwrap()
435            );
436
437            // Request X509 key packages
438            let x509_key_packages = session_context
439                .transaction
440                .get_or_create_client_keypackages(cipher_suite, MlsCredentialType::X509, 5)
441                .await
442                .unwrap();
443
444            // Verify that the key packages are X509
445            assert!(
446                x509_key_packages.iter().all(|kp| MlsCredentialType::X509
447                    == MlsCredentialType::from(kp.leaf_node().credential().credential_type()))
448            );
449        })
450        .await
451    }
452
453    #[apply(all_cred_cipher)]
454    #[wasm_bindgen_test]
455    async fn generates_correct_number_of_kpbs(case: TestContext) {
456        let [cc] = case.sessions().await;
457        Box::pin(async move {
458            const N: usize = 2;
459            const COUNT: usize = 109;
460
461            let init = cc.transaction.count_entities().await;
462            assert_eq!(init.key_package, INITIAL_KEYING_MATERIAL_COUNT);
463            assert_eq!(init.encryption_keypair, INITIAL_KEYING_MATERIAL_COUNT);
464            assert_eq!(init.hpke_private_key, INITIAL_KEYING_MATERIAL_COUNT);
465            assert_eq!(init.credential, 1);
466            assert_eq!(init.signature_keypair, 1);
467
468            // since 'delete_keypackages' will evict all Credentials unlinked to a KeyPackage, each iteration
469            // generates 1 extra KeyPackage in order for this Credential no to be evicted and next iteration sto succeed.
470            let transactional_provider = cc.transaction.mls_provider().await.unwrap();
471            let crypto_provider = transactional_provider.crypto();
472            let mut pinned_kp = None;
473
474            let mut prev_kps: Option<Vec<KeyPackage>> = None;
475            for _ in 0..N {
476                let mut kps = cc
477                    .transaction
478                    .get_or_create_client_keypackages(case.ciphersuite(), case.credential_type, COUNT + 1)
479                    .await
480                    .unwrap();
481
482                // this will always be the same, first KeyPackage
483                pinned_kp = Some(kps.pop().unwrap());
484
485                assert_eq!(kps.len(), COUNT);
486                let after_creation = cc.transaction.count_entities().await;
487                assert_eq!(after_creation.key_package, COUNT + 1);
488                assert_eq!(after_creation.encryption_keypair, COUNT + 1);
489                assert_eq!(after_creation.hpke_private_key, COUNT + 1);
490                assert_eq!(after_creation.credential, 1);
491
492                let kpbs_refs = kps
493                    .iter()
494                    .map(|kp| kp.hash_ref(crypto_provider).unwrap())
495                    .collect::<Vec<KeyPackageRef>>();
496
497                if let Some(pkpbs) = prev_kps.replace(kps) {
498                    let pkpbs_refs = pkpbs
499                        .into_iter()
500                        .map(|kpb| kpb.hash_ref(crypto_provider).unwrap())
501                        .collect::<Vec<KeyPackageRef>>();
502
503                    let has_duplicates = kpbs_refs.iter().any(|href| pkpbs_refs.contains(href));
504                    // Make sure we have no previous keypackages found (that were pruned) in our new batch of KPs
505                    assert!(!has_duplicates);
506                }
507                cc.transaction.delete_keypackages(&kpbs_refs).await.unwrap();
508            }
509
510            let count = cc
511                .transaction
512                .client_valid_key_packages_count(case.ciphersuite(), case.credential_type)
513                .await
514                .unwrap();
515            assert_eq!(count, 1);
516
517            let pinned_kpr = pinned_kp.unwrap().hash_ref(crypto_provider).unwrap();
518            cc.transaction.delete_keypackages(&[pinned_kpr]).await.unwrap();
519            let count = cc
520                .transaction
521                .client_valid_key_packages_count(case.ciphersuite(), case.credential_type)
522                .await
523                .unwrap();
524            assert_eq!(count, 0);
525            let after_delete = cc.transaction.count_entities().await;
526            assert_eq!(after_delete.key_package, 0);
527            assert_eq!(after_delete.encryption_keypair, 0);
528            assert_eq!(after_delete.hpke_private_key, 0);
529            assert_eq!(after_delete.credential, 0);
530        })
531        .await
532    }
533
534    #[apply(all_cred_cipher)]
535    #[wasm_bindgen_test]
536    async fn automatically_prunes_lifetime_expired_keypackages(case: TestContext) {
537        let [session] = case.sessions().await;
538        const UNEXPIRED_COUNT: usize = 125;
539        const EXPIRED_COUNT: usize = 200;
540        let key = DatabaseKey::generate();
541        let backend = MlsCryptoProvider::try_new_in_memory(&key).await.unwrap();
542        let x509_test_chain = if case.is_x509() {
543            let x509_test_chain = crate::test_utils::x509::X509TestChain::init_empty(case.signature_scheme());
544            x509_test_chain.register_with_provider(&backend).await;
545            Some(x509_test_chain)
546        } else {
547            None
548        };
549        backend.new_transaction().await.unwrap();
550        let session = session.session().await;
551        session
552            .random_generate(
553                &case,
554                x509_test_chain.as_ref().map(|chain| chain.find_local_intermediate_ca()),
555                false,
556            )
557            .await
558            .unwrap();
559
560        // Generate `UNEXPIRED_COUNT` kpbs that are with default 3 months expiration. We *should* keep them for the duration of the test
561        let unexpired_kpbs = session
562            .request_key_packages(UNEXPIRED_COUNT, case.ciphersuite(), case.credential_type, &backend)
563            .await
564            .unwrap();
565        let len = session
566            .valid_keypackages_count(&backend, case.ciphersuite(), case.credential_type)
567            .await
568            .unwrap();
569        assert_eq!(len, unexpired_kpbs.len());
570        assert_eq!(len, UNEXPIRED_COUNT);
571
572        // Set the keypackage expiration to be in 2 seconds
573        session
574            .set_keypackage_lifetime(std::time::Duration::from_secs(10))
575            .await
576            .unwrap();
577
578        // Generate new keypackages that are normally partially expired 2s after they're requested
579        let partially_expired_kpbs = session
580            .request_key_packages(EXPIRED_COUNT, case.ciphersuite(), case.credential_type, &backend)
581            .await
582            .unwrap();
583        assert_eq!(partially_expired_kpbs.len(), EXPIRED_COUNT);
584
585        // Sleep to trigger the expiration
586        async_std::task::sleep(std::time::Duration::from_secs(10)).await;
587
588        // Request the same number of keypackages. The automatic lifetime-based expiration should take
589        // place and remove old expired keypackages and generate fresh ones instead
590        let fresh_kpbs = session
591            .request_key_packages(EXPIRED_COUNT, case.ciphersuite(), case.credential_type, &backend)
592            .await
593            .unwrap();
594        let len = session
595            .valid_keypackages_count(&backend, case.ciphersuite(), case.credential_type)
596            .await
597            .unwrap();
598        assert_eq!(len, fresh_kpbs.len());
599        assert_eq!(len, EXPIRED_COUNT);
600
601        // Try to deep compare and find kps matching expired and non-expired ones
602        let (unexpired_match, expired_match) =
603            fresh_kpbs
604                .iter()
605                .fold((0usize, 0usize), |(mut unexpired_match, mut expired_match), fresh| {
606                    if unexpired_kpbs.iter().any(|kp| kp == fresh) {
607                        unexpired_match += 1;
608                    } else if partially_expired_kpbs.iter().any(|kpb| kpb == fresh) {
609                        expired_match += 1;
610                    }
611
612                    (unexpired_match, expired_match)
613                });
614
615        // TADA!
616        assert_eq!(unexpired_match, UNEXPIRED_COUNT);
617        assert_eq!(expired_match, 0);
618    }
619
620    #[apply(all_cred_cipher)]
621    #[wasm_bindgen_test]
622    async fn new_keypackage_has_correct_extensions(case: TestContext) {
623        let [cc] = case.sessions().await;
624        Box::pin(async move {
625            let kps = cc
626                .transaction
627                .get_or_create_client_keypackages(case.ciphersuite(), case.credential_type, 1)
628                .await
629                .unwrap();
630            let kp = kps.first().unwrap();
631
632            // make sure it's valid
633            let _ = KeyPackageIn::from(kp.clone())
634                .standalone_validate(
635                    &cc.transaction.mls_provider().await.unwrap(),
636                    ProtocolVersion::Mls10,
637                    true,
638                )
639                .await
640                .unwrap();
641
642            // see https://www.rfc-editor.org/rfc/rfc9420.html#section-10-10
643            assert!(kp.extensions().is_empty());
644
645            assert_eq!(kp.leaf_node().capabilities().versions(), &[ProtocolVersion::Mls10]);
646            assert_eq!(
647                kp.leaf_node().capabilities().ciphersuites().to_vec(),
648                MlsConversationConfiguration::DEFAULT_SUPPORTED_CIPHERSUITES
649                    .iter()
650                    .map(|c| VerifiableCiphersuite::from(*c))
651                    .collect::<Vec<_>>()
652            );
653            assert!(kp.leaf_node().capabilities().proposals().is_empty());
654            assert!(kp.leaf_node().capabilities().extensions().is_empty());
655            assert_eq!(
656                kp.leaf_node().capabilities().credentials(),
657                MlsConversationConfiguration::DEFAULT_SUPPORTED_CREDENTIALS
658            );
659        })
660        .await
661    }
662}
core_crypto/mls/session/key_package.rs

core_crypto/mls/session/
key_package.rs
