2019-11-12 14:31:46 +00:00
# Sign up to a homeserver
This document describes the flow of registration to a homeserver. Examples come from the matrix.org homeserver, and the logs come from Riot-Android.
Note that it contains bugs:
- "password" and "initial_device_display_name" values are sent a bit too much
- the first received "sessionId" is not reused
- The order of stages returned by the homeserver is not strictly followed
Ref: https://matrix.org/docs/spec/client_server/latest#account-registration-and-management
## Sign up flows
### First step
Client request the sign-up flows, once the homeserver is chosen by the user and its url is knwon (in the example it's https://matrix.org)
> curl -X POST --data $'{"initial_device_display_name":"Mobile device","x_show_msisdn":true}' 'https://matrix.org/_matrix/client/r0/register'
```json
{
"initial_device_display_name": "Mobile device",
"x_show_msisdn": true
}
```
401
```json
{
"session": "vwehdKMtkRedactedAMwgCACZ",
"flows": [
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.dummy"
]
},
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.email.identity"
]
}
],
"params": {
"m.login.recaptcha": {
"public_key": "6LcgI54UAAAAAoREDACTEDoDdOocFpYVdjYBRe4zb"
},
"m.login.terms": {
"policies": {
"privacy_policy": {
"version": "1.0",
"en": {
"name": "Terms and Conditions",
"url": "https:\/\/matrix.org\/_matrix\/consent?v=1.0"
}
}
}
}
}
}
```
### Step 1: entering user name and password
The app is displaying a form with login and password. Only the login is sent for the first request
> curl -X POST --data $'{"initial_device_display_name":"Mobile device","username":"alice"}' 'https://matrix.org/_matrix/client/r0/register'
```json
{
"initial_device_display_name": "Mobile device",
"username": "alice"
}
```
401
```json
{
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"flows": [
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.dummy"
]
},
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.email.identity"
]
}
],
"params": {
"m.login.recaptcha": {
"public_key": "6LcgI54UAAAAAoREDACTEDoDdOocFpYVdjYBRe4zb"
},
"m.login.terms": {
"policies": {
"privacy_policy": {
"version": "1.0",
"en": {
"name": "Terms and Conditions",
"url": "https:\/\/matrix.org\/_matrix\/consent?v=1.0"
}
}
}
}
}
}
```
#### If username already exists
```json
{
"errcode": "M_USER_IN_USE",
"error": "User ID already taken."
}
```
### Step 2: entering email
User is proposed to enter an email. We skip this step.
> curl -X POST --data $'{"auth":{"session":"xptUYoREDACTEDogOWAGVnbJQ","type":"m.login.dummy"},"initial_device_display_name":"Mobile device","password":"azerty","username":"alice"}' 'https://matrix.org/_matrix/client/r0/register'
```json
{
"auth": {
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"type": "m.login.dummy"
},
"initial_device_display_name": "Mobile device",
"password": "password_REDACTED",
"username":"alice"
}
```
401
```json
{
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"flows": [
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.dummy"
]
},
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.email.identity"
]
}
],
"params": {
"m.login.recaptcha": {
"public_key": "6LcgI54UAAAAAoREDACTEDoDdOocFpYVdjYBRe4zb"
},
"m.login.terms": {
"policies": {
"privacy_policy": {
"version": "1.0",
"en": {
"name": "Terms and Conditions",
"url": "https:\/\/matrix.org\/_matrix\/consent?v=1.0"
}
}
}
}
},
"completed": [
"m.login.dummy"
]
}
```
### Step 2 bis: we enter an email
> curl -X POST --data $'{"client_secret":"53e679ea-oRED-ACTED-92b8-3012c49c6cfa","email":"alice@yopmail.com","send_attempt":0}' 'https://matrix.org/_matrix/client/r0/register/email/requestToken'
```json
{
"client_secret": "53e679ea-oRED-ACTED-92b8-3012c49c6cfa",
"email": "alice@yopmail.com",
"send_attempt": 0
}
```
200
```json
{
"sid": "qlBCREDACTEDEtgxD"
}
```
And
> curl -X POST --data $'{"auth":{"threepid_creds":{"client_secret":"53e679ea-oRED-ACTED-92b8-3012c49c6cfa","sid":"qlBCREDACTEDEtgxD"},"session":"xptUYoREDACTEDogOWAGVnbJQ","type":"m.login.email.identity"},"initial_device_display_name":"Mobile device","password":"password_REDACTED","username":"alice"}' 'https://matrix.org/_matrix/client/r0/register'
```json
{
"auth": {
"threepid_creds": {
"client_secret": "53e679ea-oRED-ACTED-92b8-3012c49c6cfa",
"sid": "qlBCREDACTEDEtgxD"
},
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"type": "m.login.email.identity"
},
"initial_device_display_name": "Mobile device",
"password": "password_REDACTED",
"username": "alice"
}
```
401
```json
{
"errcode": "M_UNAUTHORIZED",
"error": ""
}
```
The app is now polling on
> curl -X POST --data $'{"auth":{"threepid_creds":{"client_secret":"53e679ea-oRED-ACTED-92b8-3012c49c6cfa","sid":"qlBCREDACTEDEtgxD"},"session":"xptUYoREDACTEDogOWAGVnbJQ","type":"m.login.email.identity"},"initial_device_display_name":"Mobile device","password":"password_REDACTED","username":"alice"}' 'https://matrix.org/_matrix/client/r0/register'
```json
{
"auth": {
"threepid_creds": {
"client_secret": "53e679ea-oRED-ACTED-92b8-3012c49c6cfa",
"sid": "qlBCREDACTEDEtgxD"
},
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"type": "m.login.email.identity"
},
"initial_device_display_name": "Mobile device",
"password": "password_REDACTED",
"username": "alice"
}
```
We click on the link received by email https://matrix.org/_matrix/client/unstable/registration/email/submit_token?token=vtQjQIZfwdoREDACTEDozrmKYSWlCXsJ& client_secret=53e679ea-oRED-ACTED-92b8-3012c49c6cfa& sid=qlBCREDACTEDEtgxD which contains:
- A token vtQjQIZfwdoREDACTEDozrmKYSWlCXsJ
- a client secret: 53e679ea-oRED-ACTED-92b8-3012c49c6cfa
- A sid: qlBCREDACTEDEtgxD
Once the link is clicked, the registration request (polling) returns a 401 with the following content:
```json
{
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"flows": [
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.dummy"
]
},
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.email.identity"
]
}
],
"params": {
"m.login.recaptcha": {
"public_key": "6LcgI54UAAAAAoREDACTEDoDdOocFpYVdjYBRe4zb"
},
"m.login.terms": {
"policies": {
"privacy_policy": {
"version": "1.0",
"en": {
"name": "Terms and Conditions",
"url": "https:\/\/matrix.org\/_matrix\/consent?v=1.0"
}
}
}
}
},
"completed": [
"m.login.email.identity"
]
}
```
### Step 3: Accepting T&C
User is proposed to accept T& C and he accepts them
> curl -X POST --data $'{"auth":{"session":"xptUYoREDACTEDogOWAGVnbJQ","type":"m.login.terms"},"initial_device_display_name":"Mobile device"}' 'https://matrix.org/_matrix/client/r0/register'
```json
{
"auth": {
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"type": "m.login.terms"
},
"initial_device_display_name": "Mobile device"
}
```
401
```json
{
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"flows": [
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.dummy"
]
},
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.email.identity"
]
}
],
"params": {
"m.login.recaptcha": {
"public_key": "6LcgI54UAAAAAoREDACTEDoDdOocFpYVdjYBRe4zb"
},
"m.login.terms": {
"policies": {
"privacy_policy": {
"version": "1.0",
"en": {
"name": "Terms and Conditions",
"url": "https:\/\/matrix.org\/_matrix\/consent?v=1.0"
}
}
}
}
},
"completed": [
"m.login.dummy",
"m.login.terms"
]
}
```
### Step 4: Captcha
User is proposed to prove he is not a robot and he does it:
2019-11-21 09:29:16 +00:00
> curl -X POST --data $'{"auth":{"response":"03AOLTBLSiGS9GhFDpAMblJ2nlXOmHXqAYJ5OvHCPUjiVLBef3k9snOYI_BDC32-t4D2jv-tpvkaiEI_uloobFd9RUTPpJ7con2hMddbKjSCYqXqcUQFhzhbcX6kw8uBnh2sbwBe80_ihrHGXEoACXQkL0ki1Q0uEtOeW20YBRjbNABsZPpLNZhGIWC0QVXnQ4FouAtZrl3gOAiyM-oG3cgP6M9pcANIAC_7T2P2amAHbtsTlSR9CsazNyS-rtDR9b5MywdtnWN9Aw8fTJb8cXQk_j7nvugMxzofPjSOrPKcr8h5OqPlpUCyxxnFtag6cuaPSUwh43D2L0E-ZX7djzaY2Yh_U2n6HegFNPOQ22CJmfrKwDlodmAfMPvAXyq77n3HpoREDACTEDo3830RHF4BfkGXUaZjctgg-A1mvC17hmQmQpkG7IhDqyw0onU-0vF_-ehCjq_CcQEDpS_O3uiHJaG5xGf-0rhLm57v_wA3deugbsZuO4uTuxZZycN_mKxZ97jlDVBetl9hc_5REPbhcT1w3uzTCSx7Q","session":"xptUYoREDACTEDogOWAGVnbJQ","type":"m.login.recaptcha"},"initial_device_display_name":"Mobile device"}' 'https://matrix.org/_matrix/client/r0/register'
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```json
{
"auth": {
"response": "03AOLTBLSiGS9GhFDpAMblJ2nlXOmHXqAYJ5OvHCPUjiVLBef3k9snOYI_BDC32-t4D2jv-tpvkaiEI_uloobFd9RUTPpJ7con2hMddbKjSCYqXqcUQFhzhbcX6kw8uBnh2sbwBe80_ihrHGXEoACXQkL0ki1Q0uEtOeW20YBRjbNABsZPpLNZhGIWC0QVXnQ4FouAtZrl3gOAiyM-oG3cgP6M9pcANIAC_7T2P2amAHbtsTlSR9CsazNyS-rtDR9b5MywdtnWN9Aw8fTJb8cXQk_j7nvugMxzofPjSOrPKcr8h5OqPlpUCyxxnFtag6cuaPSUwh43D2L0E-ZX7djzaY2Yh_U2n6HegFNPOQ22CJmfrKwDlodmAfMPvAXyq77n3HpoREDACTEDo3830RHF4BfkGXUaZjctgg-A1mvC17hmQmQpkG7IhDqyw0onU-0vF_-ehCjq_CcQEDpS_O3uiHJaG5xGf-0rhLm57v_wA3deugbsZuO4uTuxZZycN_mKxZ97jlDVBetl9hc_5REPbhcT1w3uzTCSx7Q",
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"session": "xptUYoREDACTEDogOWAGVnbJQ",
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"type": "m.login.recaptcha"
},
"initial_device_display_name": "Mobile device"
}
```
200
```json
{
"user_id": "@alice:matrix.org",
"home_server": "matrix.org",
"access_token": "MDAxOGxvY2F0aW9uIG1hdHJpeC5vcmcKMoREDACTEDo50aWZpZXIga2V5CjAwMTBjaWQgZ2VuID0gMQowMDI5Y2lkIHVzZXJfaWQgPSBAYmVub2l0eHh4eDptYXRoREDACTEDoCjAwMTZjaWQgdHlwZSA9IGFjY2VzcwowMDIxY2lkIG5vbmNlID0gNHVSVm00aVFDaWlKdoREDACTEDoJmc2lnbmF0dXJlIOmHnTLRfxiPjhrWhS-dThUX-qAzZktfRThzH1YyAsxaCg",
"device_id": "FLBAREDAJZ"
}
```
The account is created!
2019-11-21 09:29:16 +00:00
### Step 5: MSISDN
Some homeservers may require the user to enter MSISDN.
On matrix.org, it's not required, and not even optional, but it's still possible for the app to add a MSIS+Dn during the registration.
The user enter a phone number and select a country, the `client_secret` is generated by the application
> curl -X POST --data $'{"client_secret":"d3e285f6-972a-496c-9a22-7915a2db57c7","send_attempt":1,"country":"FR","phone_number":"+33611223344"}' 'https://matrix.org/_matrix/client/r0/register/msisdn/requestToken'
```json
{
"client_secret": "d3e285f6-972a-496c-9a22-7915a2db57c7",
"send_attempt": 1,
"country": "FR",
"phone_number": "+33611223344"
}
```
If the msisdn is already associated to another account, you will received an error:
```json
{
"errcode": "M_THREEPID_IN_USE",
"error": "Phone number is already in use"
}
```
If it is not the case, the homeserver send the SMS and returns some data, especially a `sid` and a `submit_url` :
```json
{
"msisdn": "33611223344",
"intl_fmt": "+336 11 22 33 44",
"success": true,
"sid": "1678881798",
"submit_url": "https:\/\/matrix.org\/_matrix\/client\/unstable\/add_threepid\/msisdn\/submit_token"
}
```
When you execute the register request, with the received `sid` , you get an error since the MSISDN is not validated yet:
> curl -X POST --data $'{"auth":{"type":"m.login.msisdn","session":"xptUYoREDACTEDogOWAGVnbJQ","threepid_creds":{"client_secret":"d3e285f6-972a-496c-9a22-7915a2db57c7","sid":"1678881798"}}}' 'https://matrix.org/_matrix/client/r0/register'
```json
"auth": {
"type": "m.login.msisdn",
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"threepid_creds": {
"client_secret": "d3e285f6-972a-496c-9a22-7915a2db57c7",
"sid": "1678881798"
}
}
}
```
There is an issue on Synapse, which return a 401, it sends too much data along with the classical MatrixError fields:
```json
{
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"flows": [
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.dummy"
]
},
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.email.identity"
]
}
],
"params": {
"m.login.recaptcha": {
"public_key": "6LcgI54UAAAAABGdGmruw6DdOocFpYVdjYBRe4zb"
},
"m.login.terms": {
"policies": {
"privacy_policy": {
"version": "1.0",
"en": {
"name": "Terms and Conditions",
"url": "https:\/\/matrix.org\/_matrix\/consent?v=1.0"
}
}
}
}
},
"completed": [],
"error": "",
"errcode": "M_UNAUTHORIZED"
}
```
The user receive the SMS, he can enter the SMS code in the app, which is sent using the "submit_url" received ie the response of the `requestToken` request:
> curl -X POST --data $'{"client_secret":"d3e285f6-972a-496c-9a22-7915a2db57c7","sid":"1678881798","token":"123456"}' 'https://matrix.org/_matrix/client/unstable/add_threepid/msisdn/submit_token'
```json
{
"client_secret": "d3e285f6-972a-496c-9a22-7915a2db57c7",
"sid": "1678881798",
"token": "123456"
}
```
If the code is not correct, we get a 200 with:
```json
{
"success": false
}
```
And if the code is correct we get a 200 with:
```json
{
"success": true
}
```
We can now execute the registration request, to the homeserver
> curl -X POST --data $'{"auth":{"type":"m.login.msisdn","session":"xptUYoREDACTEDogOWAGVnbJQ","threepid_creds":{"client_secret":"d3e285f6-972a-496c-9a22-7915a2db57c7","sid":"1678881798"}}}' 'https://matrix.org/_matrix/client/r0/register'
```json
{
"auth": {
"type": "m.login.msisdn",
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"threepid_creds": {
"client_secret": "d3e285f6-972a-496c-9a22-7915a2db57c7",
"sid": "1678881798"
}
}
}
```
Now the homeserver consider that the `m.login.msisdn` step is completed (401):
```json
{
"session": "xptUYoREDACTEDogOWAGVnbJQ",
"flows": [
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.dummy"
]
},
{
"stages": [
"m.login.recaptcha",
"m.login.terms",
"m.login.email.identity"
]
}
],
"params": {
"m.login.recaptcha": {
"public_key": "6LcgI54UAAAAABGdGmruw6DdOocFpYVdjYBRe4zb"
},
"m.login.terms": {
"policies": {
"privacy_policy": {
"version": "1.0",
"en": {
"name": "Terms and Conditions",
"url": "https:\/\/matrix.org\/_matrix\/consent?v=1.0"
}
}
}
}
},
"completed": [
"m.login.msisdn"
]
}
```
