René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"SRTP Stream","articleBody":"Research low level streaming protocol aka **Nanov3**.\r\n\r\nIs it using this?\r\n\r\n`GET /v4/sessions/home/12D89B40-ACB6-4E1B-8E96-F744E8D05D73/configuration HTTP/1.1`\r\n```json\r\n{\r\n    \"keepAlivePulseInSeconds\": 300,\r\n    \"serverDetails\": {\r\n        \"ipAddress\": \"10.0.0.174\",\r\n        \"port\": 9002,\r\n        \"ipV4Address\": \"10.0.0.174\",\r\n        \"ipV4Port\": 9002,\r\n        \"ipV6Address\": null,\r\n        \"ipV6Port\": 0,\r\n        \"iceExchangePath\": \"v4/sessions/home/12D89B40-ACB6-4E1B-8E96-F744E8D05D73/ice\",\r\n        \"stunServerAddress\": null,\r\n        \"srtp\": {\r\n            \"key\": \"iq+1DPPH/H+4k/n4wERjqXr4OXYXrwqcDiitbHkz\"\r\n        }\r\n    }\r\n}\r\n```\r\n\r\nOr does it use the `srtp.key` above and negotiated connection/port of ICE (see Issue #2 - ICE: Negotiation) ?\r\n\r\n## UPDATE (2020/03/03)\r\n\r\n- Yes, `srtp.key` received in this HTTP response is indeed the per-session **MASTER KEY**\r\n- This key is transformed into 3 **SESSION KEYS**\r\n\r\nMS-SRTP follows the basic patterns of **RFC3711** with minor differences: (https://docs.microsoft.com/en-us/openspecs/office_protocols/ms-srtp/ac253f1b-e9a7-46d2-8508-e6b3c3641a68)\r\n\r\n## Plan of action\r\n\r\n- [X] Research master/session key derivation\r\n- [x] Implement (MS-)SRTP patterns according to **RFC3711**\r\n  - [ ] Find out if there is a library that already provides the required SRTP patterns\r\n  - [x] Research how **Nonce** for AES-GCM cryptographical context is transformed (from session key 3)\r\n\r\n## References\r\n[MS-SRTP: Secure Real-time Transport Protocol (SRTP) Profile](https://docs.microsoft.com/en-us/openspecs/office_protocols/ms-srtp/d9641c95-b152-4cc7-8311-d178f3241f1f)\r\n\r\n[RFC3711](https://www.rfc-editor.org/rfc/rfc3711.txt)","author":{"url":"https://github.com/tuxuser","@type":"Person","name":"tuxuser"},"datePublished":"2020-09-29T22:50:26.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/3/xcloud-python/issues/3"}