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RetainedKeyPackageMaterial

openmls::components::vc_derivation_info

Struct RetainedKeyPackageMaterial 

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pub struct RetainedKeyPackageMaterial {
    pub epoch_id: EpochId,
    pub leaf_index: LeafNodeIndex,
    pub generation: u32,
    pub key_package_ciphersuite: Ciphersuite,
    pub key_package_index: u32,
    pub key_package_seed_secret: KeyPackageSeedSecret,
}
Available on crate feature extensions-draft and crate feature virtual-clients-draft and (32-bit or 64-bit) only.
Expand description

Per-KeyPackageRef material a sibling retains when it processes a KeyPackageUpload. It captures what the Welcome path needs to later rederive the KeyPackage’s init and leaf-encryption keys without touching the operation tree: the per-KeyPackage seed secret, plus the emulation epoch, leaf index, generation, and batch index used to validate the leaf found in the ratchet tree.

The seed is pinned here at upload-processing time so the Welcome path stays independent of the operation tree’s bounded out-of-order tolerance: a batch can hold more KeyPackages than that tolerance, and Welcomes can arrive in any order, yet every seed remains available because the single batch generation is consumed once and each seed is stored alongside its index.

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§epoch_id: EpochId

Emulation epoch the KeyPackage belongs to.

§leaf_index: LeafNodeIndex

Uploader’s emulation-group leaf index, identifying the operation ratchet the batch generation was allocated from.

§generation: u32

Operation-ratchet generation consumed for the whole batch.

§key_package_ciphersuite: Ciphersuite

Ciphersuite of the KeyPackage.

§key_package_index: u32

Position of this KeyPackage within the batch.

§key_package_seed_secret: KeyPackageSeedSecret

Per-KeyPackage seed secret from which the init and leaf-encryption keys are derived at Welcome time.

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impl Debug for RetainedKeyPackageMaterial

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for RetainedKeyPackageMaterial

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Entity<CURRENT_VERSION> for RetainedKeyPackageMaterial

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impl RetainedKeyPackageMaterial<CURRENT_VERSION> for RetainedKeyPackageMaterial

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impl Serialize for RetainedKeyPackageMaterial

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more

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