Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Omit runtime fields from FLS suggestions #78330

Merged
merged 6 commits into from
Oct 1, 2020
Merged
Show file tree
Hide file tree
Changes from 2 commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
52 changes: 43 additions & 9 deletions x-pack/plugins/security/server/routes/indices/get_fields.ts
Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,20 @@ import { schema } from '@kbn/config-schema';
import { RouteDefinitionParams } from '../index';
import { wrapIntoCustomErrorResponse } from '../../errors';

interface FieldMappingResponse {
Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Improved type safety, at least until we can migrate away from the legacy ES client.

[indexName: string]: {
mappings: {
[fieldName: string]: {
mapping: {
[fieldName: string]: {
type: string;
};
};
};
};
};
}

export function defineGetFieldsRoutes({ router, clusterClient }: RouteDefinitionParams) {
router.get(
{
Expand All @@ -23,21 +37,41 @@ export function defineGetFieldsRoutes({ router, clusterClient }: RouteDefinition
fields: '*',
allowNoIndices: false,
includeDefaults: true,
})) as Record<string, { mappings: Record<string, unknown> }>;
})) as FieldMappingResponse;

// The flow is the following (see response format at https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-get-field-mapping.html):
// 1. Iterate over all matched indices.
// 2. Extract all the field names from the `mappings` field of the particular index.
// 3. Collect and flatten the list of the field names.
// 3. Collect and flatten the list of the field names, omitting any fields without mappings, and any runtime fields
// 4. Use `Set` to get only unique field names.
const fields = Array.from(
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

question: how do you feel about adding a simple jest test to test this logic?

Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Good idea, will do!

new Set(
Object.values(indexMappings)
.map((indexMapping) => {
return Object.entries(indexMapping.mappings).map(([fieldName, properties]) => {
const mappingValues = Object.values(properties.mapping);
const hasMapping = mappingValues.length > 0;

const isRuntimeField = hasMapping && mappingValues[0]?.type === 'runtime';

// fields without mappings are internal fields such as `_routing` and `_index`,
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

👍

// and therefore don't make sense as autocomplete suggestions for FLS.

// Runtime fields are not securable via FLS.
// Administrators should instead secure access to the fields which derive this information.
if (!hasMapping || isRuntimeField) {
return null;
}

return fieldName;
});
})
.flat()
)
).filter((field) => field !== null) as string[];
legrego marked this conversation as resolved.
Show resolved Hide resolved

return response.ok({
body: Array.from(
new Set(
Object.values(indexMappings)
.map((indexMapping) => Object.keys(indexMapping.mappings))
.flat()
)
),
body: fields,
});
} catch (error) {
return response.customError(wrapIntoCustomErrorResponse(error));
Expand Down
60 changes: 60 additions & 0 deletions x-pack/test/api_integration/apis/security/index_fields.ts
Original file line number Diff line number Diff line change
Expand Up @@ -7,10 +7,33 @@
import expect from '@kbn/expect/expect.js';
import { FtrProviderContext } from '../../ftr_provider_context';

interface FLSFieldMappingResponse {
flstest: {
mappings: {
[fieldName: string]: {
mapping: {
[fieldName: string]: {
type: string;
};
};
};
};
};
}

export default function ({ getService }: FtrProviderContext) {
const supertest = getService('supertest');
const esArchiver = getService('esArchiver');
const es = getService('legacyEs');

describe('Index Fields', () => {
before(async () => {
await esArchiver.load('security/flstest/data');
});
after(async () => {
await esArchiver.unload('security/flstest/data');
});

describe('GET /internal/security/fields/{query}', () => {
it('should return a list of available index mapping fields', async () => {
await supertest
Expand All @@ -30,6 +53,43 @@ export default function ({ getService }: FtrProviderContext) {
sampleOfExpectedFields.forEach((field) => expect(response.body).to.contain(field));
});
});

it('should not include runtime fields', async () => {
// First, make sure the mapping actually includes a runtime field
const fieldMapping = (await es.indices.getFieldMapping({
index: 'flstest',
fields: '*',
includeDefaults: true,
})) as FLSFieldMappingResponse;

expect(Object.keys(fieldMapping.flstest.mappings)).to.contain('runtime_customer_ssn');
expect(
fieldMapping.flstest.mappings.runtime_customer_ssn.mapping.runtime_customer_ssn.type
).to.eql('runtime');

// Now, make sure it's not returned here
await supertest
.get('/internal/security/fields/flstest')
.set('kbn-xsrf', 'xxx')
.send()
.expect(200)
.then((response: Record<string, any>) => {
const actualFields = response.body as string[];
const expectedFields = [
'customer_ssn',
'customer_ssn.keyword',
'customer_region',
'customer_region.keyword',
'customer_name',
'customer_name.keyword',
];

actualFields.sort();
expectedFields.sort();

expect(actualFields).to.eql(expectedFields);
});
legrego marked this conversation as resolved.
Show resolved Hide resolved
});
});
});
}
Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,13 @@
}
},
"type": "text"
},
"runtime_customer_ssn": {
"type": "runtime",
"runtime_type": "keyword",
"script": {
"source": "emit(doc['customer_ssn'].value + ' calculated at runtime')"
}
}
}
},
Expand Down