mx.crypto 0.2.0

• HIGH (security): mxc_olm_create_outbound() now propagates vodozemac’s SessionCreationError instead of silently encoding a Result as a Session external pointer. The previous behavior meant a non-contributory Diffie-Hellman key (Soatok 2026-02 disclosure, fixed in vodozemac 0.10.0 itself) returned a corrupt pointer that produced undefined behavior on use.
• New: mxc_ed25519_verify(), mxc_verify_device_keys(), mxc_verify_one_time_key() so callers can validate homeserver-supplied device-keys and signed one-time keys before using them. Hostile-fixture tests cover every rejection branch.
• New: SECURITY.md (threat model, pinned dependency status, pickle hygiene, known limitations).
• New: vignette security-audit walking the audit findings.
• DESCRIPTION: mx.api (>= 0.1.0.1) and simplermarkdown added to Suggests; VignetteBuilder: simplermarkdown.

mx.crypto 0.1.0

• Initial release.
• Wraps the ‘vodozemac’ Rust crate (Matrix.org) for Olm + Megolm.
• Account: identity keys, one-time keys, fallback keys, signing, pickle / unpickle.
• Olm sessions: outbound and inbound creation, encrypt, decrypt, pickle / unpickle.
• Megolm group sessions: outbound (sender) and inbound (receiver) creation, encrypt, decrypt, pickle / unpickle.
• Pure crypto only; HTTP transport lives in the ‘mx.api’ package.
• Out of scope for 0.1.0: room-key requests / forwarded keys, cross-signing, SAS verification.