v2.2.0
- Added
SmimeState.PROBABLY_SIGNEDfor Outlook messages that declaremultipart/signedbut omit the S/MIME protocol parameter (#8). - Protected
SmimeKeycertificate-chain state by returning a defensive copy fromgetCertificateChain()(#15). - Expanded the key-loading example after #7.
Compatibility: the API is source-compatible, but exhaustive handling of SmimeState should account for the new PROBABLY_SIGNED value.