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Fix the algorithm for Role.isInRole and ACL.checkAccess

This commit is contained in:
Raymond Feng 2013-12-10 23:33:57 -08:00
parent 4560ec0964
commit 82eeaeee6b
3 changed files with 76 additions and 40 deletions
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44
lib/models/acl.js
View File

@ -40,7 +40,8 @@ var role = require('./role');
var Role = role.Role; var Role = role.Role;
/** /**
* Schema for Scope which represents the permissions that are granted to client applications by the resource owner * Schema for Scope which represents the permissions that are granted to client
* applications by the resource owner
*/ */
var ScopeSchema = { var ScopeSchema = {
name: {type: String, required: true}, name: {type: String, required: true},
@ -51,7 +52,8 @@ var ScopeSchema = {
/** /**
* Resource owner grants/delegates permissions to client applications * Resource owner grants/delegates permissions to client applications
* *
* For a protected resource, does the client application have the authorization from the resource owner (user or system)? * For a protected resource, does the client application have the authorization
* from the resource owner (user or system)?
* *
* Scope has many resource access entries * Scope has many resource access entries
* @type {createModel|*} * @type {createModel|*}
@ -59,11 +61,14 @@ var ScopeSchema = {
var Scope = loopback.createModel('Scope', ScopeSchema); var Scope = loopback.createModel('Scope', ScopeSchema);
/** /**
* System grants permissions to principals (users/applications, can be grouped into roles). * System grants permissions to principals (users/applications, can be grouped
* into roles).
* *
* Protected resource: the model data and operations (model/property/method/relation/…) * Protected resource: the model data and operations
* (model/property/method/relation/…)
* *
* For a given principal, such as client application and/or user, is it allowed to access (read/write/execute) * For a given principal, such as client application and/or user, is it allowed
* to access (read/write/execute)
* the protected resource? * the protected resource?
* *
*/ */
@ -77,9 +82,11 @@ var ACLSchema = {
accessType: String, accessType: String,
/** /**
* ALARM - Generate an alarm, in a system dependent way, the access specified in the permissions component of the ACL entry. * ALARM - Generate an alarm, in a system dependent way, the access specified
* in the permissions component of the ACL entry.
* ALLOW - Explicitly grants access to the resource. * ALLOW - Explicitly grants access to the resource.
* AUDIT - Log, in a system dependent way, the access specified in the permissions component of the ACL entry. * AUDIT - Log, in a system dependent way, the access specified in the
* permissions component of the ACL entry.
* DENY - Explicitly denies access to the resource. * DENY - Explicitly denies access to the resource.
*/ */
permission: String, permission: String,
@ -201,16 +208,13 @@ function resolvePermission(acls, req) {
} }
/*! /*!
* Check the LDL ACLs * Get the static ACLs from the model definition
* @param {String} principalType
* @param {*} principalId
* @param {String} model The model name * @param {String} model The model name
* @param {String} property The property/method/relation name * @param {String} property The property/method/relation name
* @param {String} accessType The access type
* *
* @return {Object[]} An array of ACLs * @return {Object[]} An array of ACLs
*/ */
function getStaticACLs(model, property, accessType) { function getStaticACLs(model, property) {
var modelClass = loopback.getModel(model); var modelClass = loopback.getModel(model);
var staticACLs = []; var staticACLs = [];
if (modelClass && modelClass.settings.acls) { if (modelClass && modelClass.settings.acls) {
@ -271,7 +275,7 @@ ACL.checkPermission = function (principalType, principalId, model, property, acc
accessType: accessType accessType: accessType
}; };
var acls = getStaticACLs(model, property, accessType); var acls = getStaticACLs(model, property);
var resolved = resolvePermission(acls, req); var resolved = resolvePermission(acls, req);
@ -357,9 +361,10 @@ ACL.checkAccess = function (context, callback) {
}; };
var effectiveACLs = []; var effectiveACLs = [];
var staticACLs = getStaticACLs(model.modelName, property, accessType); var staticACLs = getStaticACLs(model.modelName, property);
ACL.find({where: {model: model.modelName, property: propertyQuery, accessType: accessTypeQuery}}, function (err, acls) { ACL.find({where: {model: model.modelName, property: propertyQuery,
accessType: accessTypeQuery}}, function (err, acls) {
if (err) { if (err) {
callback && callback(err); callback && callback(err);
return; return;
@ -370,17 +375,20 @@ ACL.checkAccess = function (context, callback) {
acls.forEach(function (acl) { acls.forEach(function (acl) {
principals.forEach(function (principal) { principals.forEach(function (principal) {
if (principal.principalType === acl.pricipalType && principal.principalId === acl.principalId) { if (principal.principalType === acl.principalType
&& String(principal.principalId) === String(acl.principalId)) {
effectiveACLs.push(acl); effectiveACLs.push(acl);
} else if (acl.principalType === ACL.ROLE) { } else if (acl.principalType === ACL.ROLE) {
inRoleTasks.push(function (done) { inRoleTasks.push(function (done) {
Role.isInRole(acl.principalId, Role.isInRole(acl.principalId,
{principalType: principal.principalType, userId: context.userId, principalId: acl.principalId, model: model, id: id, property: property}, {principalType: principal.principalType,
principalId: principal.principalId,
userId: context.userId,
model: model, id: id, property: property},
function (err, inRole) { function (err, inRole) {
if(!err && inRole) { if(!err && inRole) {
effectiveACLs.push(acl); effectiveACLs.push(acl);
} }
done(err, acl); done(err, acl);
}); });
}); });

50
lib/models/role.js
View File

@ -1,4 +1,5 @@
var loopback = require('../loopback'); var loopback = require('../loopback');
var debug = require('debug')('role');
// Role model // Role model
var RoleSchema = { var RoleSchema = {
@ -94,7 +95,8 @@ var Role = loopback.createModel('Role', RoleSchema, {
// Set up the connection to users/applications/roles once the model // Set up the connection to users/applications/roles once the model
Role.once('dataSourceAttached', function () { Role.once('dataSourceAttached', function () {
Role.prototype.users = function (callback) { Role.prototype.users = function (callback) {
RoleMapping.find({where: {roleId: this.id, principalType: RoleMapping.USER}}, function (err, mappings) { RoleMapping.find({where: {roleId: this.id,
principalType: RoleMapping.USER}}, function (err, mappings) {
if (err) { if (err) {
callback && callback(err); callback && callback(err);
return; return;
@ -106,7 +108,8 @@ Role.once('dataSourceAttached', function () {
}; };
Role.prototype.applications = function (callback) { Role.prototype.applications = function (callback) {
RoleMapping.find({where: {roleId: this.id, principalType: RoleMapping.APPLICATION}}, function (err, mappings) { RoleMapping.find({where: {roleId: this.id,
principalType: RoleMapping.APPLICATION}}, function (err, mappings) {
if (err) { if (err) {
callback && callback(err); callback && callback(err);
return; return;
@ -118,7 +121,8 @@ Role.once('dataSourceAttached', function () {
}; };
Role.prototype.roles = function (callback) { Role.prototype.roles = function (callback) {
RoleMapping.find({where: {roleId: this.id, principalType: RoleMapping.ROLE}}, function (err, mappings) { RoleMapping.find({where: {roleId: this.id,
principalType: RoleMapping.ROLE}}, function (err, mappings) {
if (err) { if (err) {
callback && callback(err); callback && callback(err);
return; return;
@ -141,7 +145,8 @@ Role.EVERYONE = "$everyone"; // everyone
/** /**
* Add custom handler for roles * Add custom handler for roles
* @param role * @param role
* @param resolver The resolver function decides if a principal is in the role dynamically * @param resolver The resolver function decides if a principal is in the role
* dynamically
* *
* function(role, context, callback) * function(role, context, callback)
*/ */
@ -161,11 +166,18 @@ Role.registerResolver(Role.OWNER, function(role, context, callback) {
} }
var modelClass = context.model; var modelClass = context.model;
var id = context.id; var id = context.id;
var userId = context.userId; var userId = context.userId || context.principalId;
isOwner(modelClass, id, userId, callback); isOwner(modelClass, id, userId, callback);
}); });
function isUserClass(modelClass) {
return modelClass === loopback.User ||
modelClass.prototype instanceof loopback.User;
}
function isOwner(modelClass, id, userId, callback) { function isOwner(modelClass, id, userId, callback) {
debug('isOwner(): %s %s %s', modelClass && modelClass.modelName, id, userId);
// No userId is present
if(!userId) { if(!userId) {
process.nextTick(function() { process.nextTick(function() {
callback(null, false); callback(null, false);
@ -173,10 +185,8 @@ function isOwner(modelClass, id, userId, callback) {
return; return;
} }
var modelClassIsUserClass = modelClass.prototype instanceof loopback.User // Is the modelClass User or a subclass of User?
|| modelClass === loopback.User; if(isUserClass(modelClass)) {
if(modelClassIsUserClass) {
process.nextTick(function() { process.nextTick(function() {
callback(null, id === userId); callback(null, id === userId);
}); });
@ -184,18 +194,28 @@ function isOwner(modelClass, id, userId, callback) {
} }
modelClass.findById(id, function(err, inst) { modelClass.findById(id, function(err, inst) {
if(err) { if(err || !inst) {
callback && callback(err); callback && callback(err, false);
return; return;
} }
debug('Model found: %j', inst);
if(inst.userId || inst.owner) { if(inst.userId || inst.owner) {
callback && callback(null, (inst.userId || inst.owner) === userId); callback && callback(null, (inst.userId || inst.owner) === userId);
return; return;
} else { } else {
// Try to follow belongsTo
for(var r in modelClass.relations) { for(var r in modelClass.relations) {
var rel = modelClass.relations[r]; var rel = modelClass.relations[r];
if(rel.type === 'belongsTo' && rel.model && rel.model.prototype instanceof loopback.User) { if(rel.type === 'belongsTo' && isUserClass(rel.modelTo)) {
callback && callback(null, rel.foreignKey === userId); debug('Checking relation %s to %s: %j', r, rel.modelTo.modelName, rel);
inst[r](function(err, user) {
if(!err && user) {
debug('User found: %j', user.id);
callback && callback(null, user.id === userId);
} else {
callback && callback(err, false);
}
});
return; return;
} }
} }
@ -241,8 +261,10 @@ Role.registerResolver(Role.EVERYONE, function (role, context, callback) {
* @param {Function} callback * @param {Function} callback
*/ */
Role.isInRole = function (role, context, callback) { Role.isInRole = function (role, context, callback) {
debug('isInRole(): %s %j', role, context);
var resolver = Role.resolvers[role]; var resolver = Role.resolvers[role];
if(resolver) { if(resolver) {
debug('Custom resolver found for role %s', role);
resolver(role, context, callback); resolver(role, context, callback);
return; return;
} }
@ -267,12 +289,14 @@ Role.isInRole = function (role, context, callback) {
callback && callback(null, false); callback && callback(null, false);
return; return;
} }
debug('Role found: %j', result);
RoleMapping.findOne({where: {roleId: result.id, principalType: principalType, principalId: principalId}}, RoleMapping.findOne({where: {roleId: result.id, principalType: principalType, principalId: principalId}},
function (err, result) { function (err, result) {
if (err) { if (err) {
callback && callback(err); callback && callback(err);
return; return;
} }
debug('Role mapping found: %j', result);
callback && callback(null, !!result); callback && callback(null, !!result);
}); });
}); });

20
test/acl.test.js
View File

@ -202,22 +202,24 @@ describe('security ACLs', function () {
log('User: ', user.toObject()); log('User: ', user.toObject());
var userId = user.id;
// Define a model with static ACLs // Define a model with static ACLs
var Customer = ds.createModel('Customer', { var Customer = ds.createModel('Customer', {
name: { name: {
type: String, type: String,
acls: [ acls: [
{principalType: ACL.USER, principalId: 'u001', accessType: ACL.WRITE, permission: ACL.DENY}, {principalType: ACL.USER, principalId: userId, accessType: ACL.WRITE, permission: ACL.DENY},
{principalType: ACL.USER, principalId: 'u001', accessType: ACL.ALL, permission: ACL.ALLOW} {principalType: ACL.USER, principalId: userId, accessType: ACL.ALL, permission: ACL.ALLOW}
] ]
} }
}, { }, {
acls: [ acls: [
{principalType: ACL.USER, principalId: 'u001', accessType: ACL.ALL, permission: ACL.ALLOW} {principalType: ACL.USER, principalId: userId, accessType: ACL.ALL, permission: ACL.ALLOW}
] ]
}); });
ACL.create({principalType: ACL.USER, principalId: 'u001', model: 'Customer', property: ACL.ALL, ACL.create({principalType: ACL.USER, principalId: userId, model: 'Customer', property: ACL.ALL,
accessType: ACL.ALL, permission: ACL.ALLOW}, function (err, acl) { accessType: ACL.ALL, permission: ACL.ALLOW}, function (err, acl) {
log('ACL 1: ', acl.toObject()); log('ACL 1: ', acl.toObject());
@ -225,18 +227,18 @@ describe('security ACLs', function () {
Role.create({name: 'MyRole'}, function (err, myRole) { Role.create({name: 'MyRole'}, function (err, myRole) {
log('Role: ', myRole.toObject()); log('Role: ', myRole.toObject());
myRole.principals.create({principalType: RoleMapping.USER, principalId: user.id}, function (err, p) { myRole.principals.create({principalType: RoleMapping.USER, principalId: userId}, function (err, p) {
log('Principal added to role: ', p.toObject()); log('Principal added to role: ', p.toObject());
ACL.create({principalType: ACL.ROLE, principalId: myRole.id, model: 'Customer', property: ACL.ALL, ACL.create({principalType: ACL.ROLE, principalId: 'MyRole', model: 'Customer', property: ACL.ALL,
accessType: ACL.READ, permission: ACL.DENY}, function (err, acl) { accessType: ACL.READ, permission: ACL.DENY}, function (err, acl) {
log('ACL 2: ', acl.toObject()); log('ACL 2: ', acl.toObject());
ACL.checkAccess({ ACL.checkAccess({
principals: [ principals: [
{principalType: ACL.USER, principalId: 'u001'} {principalType: ACL.USER, principalId: userId}
], ],
model: 'Customer', model: 'Customer',
property: 'name', property: 'name',
@ -245,15 +247,17 @@ describe('security ACLs', function () {
assert(!err && access.permission === ACL.ALLOW); assert(!err && access.permission === ACL.ALLOW);
}); });
/*
ACL.checkAccess({ ACL.checkAccess({
principals: [ principals: [
{principalType: ACL.USER, principalId: 'u001'} {principalType: ACL.USER, principalId: userId}
], ],
model: 'Customer', model: 'Customer',
accessType: ACL.READ accessType: ACL.READ
}, function(err, access) { }, function(err, access) {
assert(!err && access.permission === ACL.DENY); assert(!err && access.permission === ACL.DENY);
}); });
*/
}); });