Radicale/SHARING.md

Collection Sharing

Static collection sharing without permissions filter using soft-links (Unix-only) is supported since storage type multifilesystem was implemented, see (Wiki: Sharing Collections)[https://github.com/Kozea/Radicale/wiki/Sharing-Collections]

With 3.7.0 major extension was implemented using internal mapping configuration stored in a database and a management API.

Sharing Implementation

Implemenation of sharing collections is done in case entry exists in sharing database by replacing provided data on request and adjust if required data in responses.

Permissions are filtered by provided Permissions.

CxDAV requests

CxDav request "(DELETE|GET|HEAD|PUT)"

• Actions
  • map
• Lookup by
  • path (provided in request)
  • user (authenticated)
• Replace
• user by Owner
• path by PathMapped
• Activate
• permissions_filter by Permissions

CxDav request "REPORT"

• Actions
  • map
  • back-map response
• Lookup by
  • path (provided in request)
  • user (authenticated)
• Replace
• user by Owner
• path by PathMapped
• Activate
• permissions_filter by Permissions

CxDav request "PROPFIND" without HTTP_DEPTH=1

• Actions
  • map
  • back-map response
  • overwrite Properties if provided
• Lookup by
  • path (provided in request)
  • user (authenticated)
• Replace
• user by Owner
• path by PathMapped
• Overlay
• Properties if provided
• Activate
• permissions_filter by Permissions

CxDav request "PROPFIND" with HTTP_DEPTH=1

• Actions
  • extend list
• Lookup for active shares for user in sharing database
• Extend list if conditions are met
• permissions_filter by Permissions

CxDav request "PROPPATCH"

• Actions
  • map
  • adjust properties of a collection
• Lookup by
  • path (provided in request)
  • user (authenticated)
• Replace
• user by Owner
• path by PathMapped
• Activate
• permissions_filter by Permissions
• Depending on permissions_filter, global options and Permissions
  • adjust properties of collection
  • adjust whitelisted properties in Properties for overlay (see OVERLAY_PROPERTIES_WHITELIST)

CxDav request "(MKCALENDAR|MKCOL)"

• Action
  • check for conflicts
• Lookup by
  • user (authenticated)
• Verify for non-existence as PathOrToken in sharing database
  • path (provided in request)

CxDav request "(MOVE)"

• Action
  • map source
  • map destination
• Lookup by
  • path (provided in request)
  • user (authenticated)
  • to_path (provided in request)
  • to_user (same as user)
• Replace
• user by Owner (of path)
• path by PathMapped (of path)
• to_user by Owner (of to_path)
• to_path by PathMapped (of to_path)
• Activate
• permissions_filter by Permissions (of to_path)
• to_permissions_filter by Permissions (of to_path)

Sharing Configuration Store

Types of supported sharing configuration:

• csv (>= 3.7.0)
• files (>= 3.7.0)

Sharing Configuration Entry Data

• ShareType: type of share
  • token: token-based share (do not require user authentication)
  • map: map-based share (requires user authentication)
• PathOrToken: token or "virtual" collection, has to be unique (PRIMARY KEY)
• PathMapped: target collection
• Owner: owner of the share
• User: user of the share
• Permissions: effective permission of the share
• EnabledByOwner: control by owner
• EnabledByUser: control by user
• HiddenByOwner: control by owner
• HiddenByUser: control by user
• TimestampCreated: unixtime of creation
• TimestampUpdated: unixtime of last update
• Properties: overlay properties (limited set whitelisted)

Enabled*: owner AND user have to enable a share to become usable

Hidden*: owner AND user have to disable a share to become visible in PROPFIND

Sharing Configuration Entry Storage

CSV

One CSV file containing one row per sharing config, separated by ; and containing header with columns from above.

If given, properties are stored in JSON format in CSV.

Files

File-based configuration store is using encoded PathOrToken as filename for each config. File contains the data stored as "dict" in binary Python "pickle" format (same is also used for item cache files).

Sharing Access

Sharing Access via Maps

Map-based sharing can be accessed as usual after authentication and authorization.

Permission Control

• permit_create_map
  • supported rights permissions: Mm

Workflow

• create map as owner
• enable map as owner (can be combined with "create")
• enable map as user (explicit required to avoid sudden available share)

In case share should be visible using PROPFIND

• unhide map as owner (can be combined with "create")
• unhide map as user (explicit required to avoid sudden visible share)

Sharing Access via Tokens

Token-based sharing can be accessed after retrieving the token via

Token-URI: /.token/<Token>

Note: requests to not enabled or not even defined tokens will resul tin 401 Not Authorized

Permission Control

• permit_create_token
  • supported rights permissions: Tt

Workflow

• create token as owner
• enable token as owner (can be combined with "create")
• handover URI with token to client

Sharing Configuration Management API

Sharing Configuration Management API version 1

Type: POST API

Base-URI: /.sharing/v1/<ShareType>/<Hook>

See also test cases in radicale/tests/test_sharing.py

Data Format

Input Data Format

Parsing be controlled by CONTENT_TYPE

• application/x-www-form-urlencoded
• application/json

Output Data Format

Can be selected by HTTP_ACCEPT - default is equal to provided CONTENT_TYPE

• text/plain
• text/csv (only for "list")
• application/json

Accepted Input Data Fields

• PathOrToken: token or "virtual" collection
• PathMapped: target collection
• Owner: owner of the share
• User: user of the share
• Permissions: effective permission of the share
• Enabled: owner/user selected by authentication
• Hidden: owner/user selected by authentication
• Properties: properties to overlay

API Hooks

API Hook "info"

Shows what kind of ShareTypes are supported

• Output: text/plain|application/json

• Examples

• form->text

curl -u user:pass -H "accept: text/plain" -d "" http://localhost:5232/.sharing/v1/all/info
ApiVersion=1
Status='success'
FeatureEnabledCollectionByMap=True
PermittedCreateCollectionByMap=True
FeatureEnabledCollectionByToken=True
PermittedCreateCollectionByToken=True  

• json->json, parsed with jq

bash
curl -u user:pass --silent -H "accept: application/json" -d "" http://localhost:5232/.sharing/v1/all/info | jq
{
  "ApiVersion": 1,
  "Status": "success",
  "FeatureEnabledCollectionByMap": true,
  "PermittedCreateCollectionByMap": true,
  "FeatureEnabledCollectionByToken": true,
  "PermittedCreateCollectionByToken": true
}

API Hook "(token|map)/create"

• Authorization
  • Authenticated user is Owner

API Hook "token/create"

Create a share by mapping a collection of an Owner to a token.

• Authorization

• PathMapped is existing and a collection

• Authenticated user as Owner has at least read access to PathMapped

• Global permitted by permit_create_token = True or rights permission t

• Global denied by permit_create_token = False or rights permission T

• Input

Parameter	Type	Requirement
PathMapped	str	mandatory
User	str	optional(default:owner)
Permissions	str	optional(default:r)
Enabled	bool	optional(owner/default:False)
Hidden	bool	optional(owner/default:True)
Properties	str	optional

• Output: text/plain|application/json

| Parameter | Type | Value | | - | - | | PathOrToken | str | (autogenerated token) |

• Examples:
• form->text

curl -u user:pass -d "PathMapped=/user/testcalendar1/" -d "Enabled=True" -d "Hidden=False" http://localhost:5232/.sharing/v1/token/create
ApiVersion=1
Status='success'
PathOrToken='v1/VQR7AmsVRi2ZlFj_JwGpFx-ES5Goyku-gP_YkLh1zUw='

• json->json

curl -u user:pass -H "Content-Type: application/json" -d '{ "PathMapped": "/user/testcalendar1/", "Enabled": true, "Hidden": false}' http://localhost:5232/.sharing/v1/token/create
{"ApiVersion": 1, "Status": "success", "PathOrToken": "v1/aMsmGqOsRwSH-2-6tEa8EMr4RMYzMU7WvPmjnp5qDnw="}

API Hook "map/create"

Create a share by mapping a collection of an Owner to an User.

• Authorization

• PathMapped is existing and a collection

• Authenticated user as Owner has at least read access to PathMapped

• Provided User has at least read access to PathOrToken

• Global permitted by permit_create_map = True or rights permission m

• Global denied by permit_create_map = False or rights permission M

• Input

| Parameter | Type | Requirement | | - | - | | PathOrToken | str | mandatory | | PathMapped | str | mandatory | | User | str | mandatory | | Permissions | str | optional(default:r) | | Enabled | bool | optional(owner/default:False) | | Hidden | bool | optional(owner/default:True) | | Properties | optional |

• Output: text/plain|application/json

• Examples:

• form->text

curl -u owner:pass -d "PathOrToken=/user/cal1-from-owner/" -d "PathMapped=/owner/testcalendar1/" -d "User=user" -d "Enabled=True" -d "Hidden=False" http://localhost:5232/.sharing/v1/map/create
ApiVersion=1
Status='success'

• json->json

curl -u owner:pass -H "Content-Type: application/json" -d '{ "PathOrToken": "/user/cal1-from-owner/", "PathMapped": "/owner/testcalendar1/", "User" : "user", "Enabled": true, "Hidden": false}' http://localhost:5232/.sharing/v1/map/create
{"ApiVersion": 1, "Status": "success"}

API Hook "(map|token|all)/list"

List shares (optional with filter) either owned or assigned as user.

• Authorization

• Authenticated user as Owner or User

• Input

Parameter	Type	Used for
PathOrToken	str	optional
PathMapped	str	optional

• Output: text/plain|text/csv|application/json

• Examples

• form->text ("all")

curl -u user:pass -d "" http://localhost:5232/.sharing/v1/map/list://localhost:5232/.sharing/v1/map/list
ApiVersion=1
Lines=1
Status='success'
Fields="ShareType;PathOrToken;PathMapped;Owner;User;Permissions;EnabledByOwner;EnabledByUser;HiddenByOwner;HiddenByUser;TimestampCreated;TimestampUpdated;Properties"
Content[0]="map;/user/cal1-from-owner/;/owner/testcalendar1/;owner;user;r;True;True;False;False;1772748001;1772748163;

• form->csv ("map" only)

curl -H "accept: text/csv" -u user:pass -d "" http://localhost:5232/.sharing/v1/map/list://localhost:5232/.sharing/v1/map/list
ShareType;PathOrToken;PathMapped;Owner;User;Permissions;EnabledByOwner;EnabledByUser;HiddenByOwner;HiddenByUser;TimestampCreated;TimestampUpdated;Properties
map;/user/cal1-from-owner/;/owner/testcalendar1/;owner;user;r;True;False;False;True;1772747277;1772747277;

• json->json ("all"), parsed with jq

curl -s -H "Content-Type: application/json" -u user:pass -d "{}" http://localhost:5232/.sharing/v1/all/list | jq
{
  "ApiVersion": 1,
  "Lines": 2,
  "Status": "success",
  "Content": [
    {
      "ShareType": "map",
      "PathOrToken": "/user/cal1-from-owner/",
      "PathMapped": "/owner/testcalendar1/",
      "Owner": "owner",
      "User": "user",
      "Permissions": "r",
      "EnabledByOwner": true,
      "EnabledByUser": false,
      "HiddenByOwner": false,
      "HiddenByUser": true,
      "TimestampCreated": 1772747277,
      "TimestampUpdated": 1772747277,
      "Properties": ""
    },
    {
      "ShareType": "token",
      "PathOrToken": "v1/DUSl_J5rRlWx3fy8YRXpH22FFllplkOTpcSwfGtpvkc=",
      "PathMapped": "/user/testcalendar1/",
      "Owner": "user",
      "User": "user",
      "Permissions": "r",
      "EnabledByOwner": true,
      "EnabledByUser": false,
      "HiddenByOwner": false,
      "HiddenByUser": true,
      "TimestampCreated": 1772747371,
      "TimestampUpdated": 1772747371,
      "Properties": ""
    }
  7]
}

API Hook "(map|token)/delete"

Delete a share selected by PathOrToken.

• Authorization

• Authenticated user is Owner

• Share is existing and owned

• Input

Parameter	Type	Used for	as Owner	as User
PathOrToken	str	selection	mandatory	not-permitted

• Output: text/plain|application/json

• Examples:

• form->text

curl -u owner:pass -d "PathOrToken=/user/cal1-from-owner/" http://localhost:5232/.sharing/v1/map/delete
ApiVersion=1
Status='success'

• json->json

curl -u user:pass -H "Content-Type: application/json" -d '{ "PathOrToken": "v1/DUSl_J5rRlWx3fy8YRXpH22FFllplkOTpcSwfGtpvkc="}' http://localhost:5232/.sharing/v1/token/delete
{"ApiVersion": 1, "Status": "success"}

API Hook "(token|map)/update"

Update a share selected by PathOrToken.

Execute delete+create in case PathOrToken needs to be changed.

• Authorization

  • Authenticated user is Owner or User

• Input

Parameter	Type	Used for	Owner	User
PathOrToken	str	selection	mandatory	mandatory
PathMapped	str	adjust	optional	not-permitted
User	str	adjust	optional	not-permitted
Permissions	str	adjust	optional	not-permitted
Enabled	bool	adjust	optional(owner)	optional(user)
Hidden	bool	adjust	optional(owner)	optional(user)
Properties	str	adjust	optional	optional

• Output: text/plain|application/json

• Examples:

  • form->text

curl -u user:pass -d "PathOrToken=/user/cal1-from-owner/" -d "Enabled=True" -d "Hidden=False" http://localhost:5232/.sharing/v1/map/update
ApiVersion=1
Status='success'

• json->json

curl -u user:pass -H "Content-Type: application/json" -d '{ "PathOrToken": "/user/cal1-from-owner/", "Enabled": true, "Hidden": false}' http://localhost:5232/.sharing/v1/map/update
{"ApiVersion": 1, "Status": "success"}

API Hooks "(map|token)/(enable|disable|hide|unhide)"

Toggle enable|disable|hide|unhide of Owner or User of a share selected by PathOrToken

• Authorization

  • Authenticated user is Owner or User
  • PathOrToken is existing and either owned or assigned to user

• Input

Parameter	Type	Used for	Owner	User
PathOrToken	selection	mandatory	mandatory

• Output: text/plain|application/json

• form->text

curl -u user:pass -d "PathOrToken=/user/cal1-from-owner/" http://localhost:5232/.sharing/v1/map/enable
ApiVersion=1
Status='success'
```bash

  * json->json

```bash
curl -u user:pass -H "Content-Type: application/json" -d '{ "PathOrToken": "/user/cal1-from-owner/"}' http://localhost:5232/.sharing/v1/map/unhide
{"ApiVersion": 1, "Status": "success"}

Properties Overlay

Owner or user can define per share a set of properties to overlay on PROPFIND response during create or update via API.

Whitelisted ones are defined in OVERLAY_PROPERTIES_WHITELIST in radicale/sharing/__init__.py:

• C:calendar-description
• ICAL:calendar-color
• CR:addressbook-description
• INF:addressbook-color

Properties Overlay Control Options

• permit_properties_overlay
  • supported share permissions: Pp
• enforce_properties_overlay
  • supported share permissions: Ee