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GroupKeys

xmtp_mls::mls_common::group_keys

Struct GroupKeys 

pub struct GroupKeys { /* private fields */ }
Expand description

The keys of the group key table, derived from one group root.

Every key is wiped on drop, and Debug shows none of them. The fields stay private: a caller signs and seals only through this module, so every signature passes the self-check.

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impl GroupKeys

pub fn derive(root: &GroupRoot) -> GroupKeys

Derive each key as HKDF-Expand(HKDF-Extract(salt, root), info, 32) under SHA-256 (RFC 5869). One output block is 32 bytes, so each key is HMAC(PRK, info || 0x01).

pub fn group_id(&self) -> [u8; 32]

The group id: the group signing key’s public key.

pub fn commit_log_id(&self) -> [u8; 32]

The commit-log id: the commit-log signing key’s public key.

Trait Implementations§

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impl Debug for GroupKeys

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

Formats the value using the given formatter. Read more

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