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matrix-spec/proposals/images/1730-seq-diagram.txt

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# https://sequencediagram.org/
participantspacing equal
participant Client
participant matrix.ac.cdl
participant SAML2 SSO system
participant matrix.eng.ac.cdl
activate Client
Client->matrix.ac.cdl:""GET /_matrix/client/r0/login""
activate matrix.ac.cdl
Client<--matrix.ac.cdl:"""type": "m.login.sso"""
deactivate matrix.ac.cdl
# Start SSO flow: displayed in browser for web clients, or via fallback auth in embeddedbrowser for others
Client->matrix.ac.cdl:""GET /_matrix/client/r0/login/sso/redirect\n--?redirectUrl=<clienturl>--""
activate matrix.ac.cdl
matrix.ac.cdl->matrix.ac.cdl:Generate SAML request
Client<--matrix.ac.cdl:302 to SSO system
deactivate matrix.ac.cdl
Client->SAML2 SSO system:""GET /single-sign-on\n--?SAMLRequest=<request>&RelayState=<clienturl>--""
activate SAML2 SSO system
Client<-->SAML2 SSO system: auth credentials
SAML2 SSO system-->Client:auto-submitting HTML form including SAML Response
deactivate SAML2 SSO system
Client->matrix.ac.cdl:""POST /SAML2\n--SAMLResponse=<response>\nRelayState=<params>
activate matrix.ac.cdl
matrix.ac.cdl->matrix.ac.cdl:map user to HS
Client<--matrix.ac.cdl:auto-submitting HTML form for target HS
deactivate matrix.ac.cdl
Client->matrix.eng.ac.cdl:""POST /SAML2\n--SAMLResponse=<response>\nRelayState=<clienturl>
activate matrix.eng.ac.cdl
Client<--matrix.eng.ac.cdl:302 to clienturl with\n""--?loginToken=<token>
deactivate matrix.eng.ac.cdl
Client->matrix.ac.cdl:""POST /_matrix/client/r0/login\n--{"type": "m.login.token","token": "<token>"}
activate matrix.ac.cdl
matrix.ac.cdl->matrix.eng.ac.cdl:""POST /_matrix/client/r0/login\n--{"type": "m.login.token", "token": "<token>"}
activate matrix.eng.ac.cdl
matrix.ac.cdl<--matrix.eng.ac.cdl:""--{"user_id": "@user:eng.ac.cdl", "access_token": "abc123",\n "well_known": {"m.homeserver": "..."}}
deactivate matrix.eng.ac.cdl
Client<--matrix.ac.cdl:""--{"user_id": "@user:eng.ac.cdl",\n "access_token": "abc123",\n "well-known": {"m.homeserver": "..."}}
deactivate matrix.ac.cdl
Client<-#0000FF>matrix.eng.ac.cdl: Matrix