Alexey Khit
45 lines
1.7 KiB
Markdown
45 lines
1.7 KiB
Markdown
# Home Accessory Protocol
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> PS. Character = Characteristic
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**Device** - HomeKit end device (swith, camera, etc)
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- mDNS name: `MyCamera._hap._tcp.local.`
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- DeviceID - mac-like: `0E:AA:CE:2B:35:71`
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- HomeKit device is described by:
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- one or more `Accessories` - has `AID` and `Services`
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- `Services` - has `IID`, `Type` and `Characters`
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- `Characters` - has `IID`, `Type`, `Format` and `Value`
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**Client** - HomeKit client (iPhone, iPad, MacBook or opensource library)
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- ClientID - static random UUID
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- ClientPublic/ClientPrivate - static random 32 byte keypair
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- can pair with Device (exchange ClientID/ClientPublic, ServerID/ServerPublic using Pin)
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- can auth to Device using ClientPrivate
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- holding persistant Secure connection to device
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- can read device Accessories
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- can read and write device Characters
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- can subscribe on device Characters change (Event)
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**Server** - HomeKit server (soft on end device or opensource library)
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- ServerID - same as DeviceID (using for Client auth)
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- ServerPublic/ServerPrivate - static random 32 byte keypair
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## AAC ELD
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Requires ffmpeg built with `--enable-libfdk-aac`
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```
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-acodec libfdk_aac -aprofile aac_eld
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```
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## Useful links
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- https://github.com/apple/HomeKitADK/blob/master/Documentation/crypto.md
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- https://github.com/apple/HomeKitADK/blob/master/HAP/HAPPairingPairSetup.c
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- [Extracting HomeKit Pairing Keys](https://pvieito.com/2019/12/extract-homekit-pairing-keys)
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- [HAP in AirPlay2 receiver](https://github.com/openairplay/airplay2-receiver/blob/master/ap2/pairing/hap.py)
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- [HomeKit Secure Video Unofficial Specification](https://github.com/Supereg/secure-video-specification)
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- [Homebridge Camera FFmpeg](https://sunoo.github.io/homebridge-camera-ffmpeg/configs/) |