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Merge pull request #40 from holaplex/mpw/add-authz-plugin
Mpw/add authz plugin
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| -- Licensed to the Apache Software Foundation (ASF) under one or more | ||
| -- contributor license agreements. See the NOTICE file distributed with | ||
| -- this work for additional information regarding copyright ownership. | ||
| -- The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| -- (the "License"); you may not use this file except in compliance with | ||
| -- the License. You may obtain a copy of the License at | ||
| -- | ||
| -- http://www.apache.org/licenses/LICENSE-2.0 | ||
| -- | ||
| -- Unless required by applicable law or agreed to in writing, software | ||
| -- distributed under the License is distributed on an "AS IS" BASIS, | ||
| -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| -- See the License for the specific language governing permissions and | ||
| -- limitations under the License. | ||
| -- | ||
|
|
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| local core = require("apisix.core") | ||
| local get_service = require("apisix.http.service").get | ||
| local http = require("resty.http") | ||
| local json = require("apisix.core.json") | ||
| local ngx = ngx | ||
| local ngx_time = ngx.time | ||
| local re_match = ngx.re.match | ||
| local type = type | ||
| local _M = {} | ||
|
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| -- build a table of Nginx variables with some generality | ||
| -- between http subsystem and stream subsystem | ||
| local function build_var(conf, ctx) | ||
| return { | ||
| server_addr = ctx.var.server_addr, | ||
| server_port = ctx.var.server_port, | ||
| remote_addr = ctx.var.remote_addr, | ||
| remote_port = ctx.var.remote_port, | ||
| timestamp = ngx_time(), | ||
| } | ||
| end | ||
|
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| local function build_http_request(conf, ctx) | ||
| return { | ||
| scheme = core.request.get_scheme(ctx), | ||
| method = core.request.get_method(), | ||
| host = core.request.get_host(ctx), | ||
| port = core.request.get_port(ctx), | ||
| path = ctx.var.uri, | ||
| headers = core.request.headers(ctx), | ||
| query = core.request.get_uri_args(ctx), | ||
| } | ||
| end | ||
|
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|
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| local function build_http_route(conf, ctx, remove_upstream) | ||
| local route = core.table.clone(ctx.matched_route).value | ||
|
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| if remove_upstream and route and route.upstream then | ||
| route.upstream = nil | ||
| end | ||
|
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| return route | ||
| end | ||
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| local function build_http_service(conf, ctx) | ||
| local service_id = ctx.service_id | ||
|
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| -- possible that there is no service bound to the route | ||
| if service_id then | ||
| local service = core.table.clone(get_service(service_id)).value | ||
|
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| if service then | ||
| if service.upstream then | ||
| service.upstream = nil | ||
| end | ||
| return service | ||
| else | ||
| core.log.error("failed to get service") | ||
| end | ||
| end | ||
|
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| return nil | ||
| end | ||
|
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| local function build_graphql_data(conf, ctx) | ||
| local input = json.decode(core.request.get_body()) | ||
| return { | ||
| query = input['query'], | ||
| variables = input['variables'], | ||
| operation = ctx.var.graphql_operation, | ||
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| } | ||
| end | ||
|
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| local function build_http_consumer(conf, ctx) | ||
| -- possible that there is no consumer bound to the route | ||
| if ctx.consumer then | ||
| return core.table.clone(ctx.consumer) | ||
| end | ||
|
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| return nil | ||
| end | ||
|
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| function _M.build_opa_input(conf, ctx, subsystem) | ||
| local data = { | ||
| type = subsystem, | ||
| request = build_http_request(conf, ctx), | ||
| var = build_var(conf, ctx), | ||
| graphql = build_graphql_data(conf, ctx), | ||
| keto_endpoint = conf.keto_endpoint | ||
| } | ||
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| if conf.with_route then | ||
| data.route = build_http_route(conf, ctx, true) | ||
| end | ||
|
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| if conf.with_consumer then | ||
| data.consumer = build_http_consumer(conf, ctx) | ||
| end | ||
|
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| if conf.with_service then | ||
| data.service = build_http_service(conf, ctx) | ||
| end | ||
|
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| return { | ||
| input = data, | ||
| } | ||
| end | ||
|
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| return _M |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| -- | ||
| -- Licensed to the Apache Software Foundation (ASF) under one or more | ||
| -- contributor license agreements. See the NOTICE file distributed with | ||
| -- this work for additional information regarding copyright ownership. | ||
| -- The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| -- (the "License"); you may not use this file except in compliance with | ||
| -- the License. You may obtain a copy of the License at | ||
| -- | ||
| -- http://www.apache.org/licenses/LICENSE-2.0 | ||
| -- | ||
| -- Unless required by applicable law or agreed to in writing, software | ||
| -- distributed under the License is distributed on an "AS IS" BASIS, | ||
| -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| -- See the License for the specific language governing permissions and | ||
| -- limitations under the License. | ||
| -- | ||
|
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| local core = require("apisix.core") | ||
| local http = require("resty.http") | ||
| local helper = require("apisix.plugins.authz.helper") | ||
| local json = require("apisix.core.json") | ||
| local type = type | ||
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| local schema = { | ||
| type = "object", | ||
| properties = { | ||
| host = {type = "string"}, | ||
| ssl_verify = { | ||
| type = "boolean", | ||
| default = true, | ||
| }, | ||
| policy = {type = "string"}, | ||
| timeout = { | ||
| type = "integer", | ||
| minimum = 1, | ||
| maximum = 60000, | ||
| default = 3000, | ||
| description = "timeout in milliseconds", | ||
| }, | ||
| keepalive = {type = "boolean", default = true}, | ||
| keepalive_timeout = {type = "integer", minimum = 1000, default = 60000}, | ||
| keepalive_pool = {type = "integer", minimum = 1, default = 5}, | ||
| with_route = {type = "boolean", default = false}, | ||
| with_service = {type = "boolean", default = false}, | ||
| with_consumer = {type = "boolean", default = false}, | ||
| }, | ||
| required = {"host", "policy"} | ||
| } | ||
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| local _M = { | ||
| version = 0.1, | ||
| priority = 1, | ||
| name = "authz", | ||
| schema = schema, | ||
| } | ||
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| function _M.check_schema(conf) | ||
| local ok, err = core.schema.check(schema, conf) | ||
| if not ok then | ||
| return false, err | ||
| end | ||
| return true | ||
| end | ||
|
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| function _M.access(conf, ctx) | ||
| local body = helper.build_opa_input(conf, ctx, "http") | ||
|
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| local params = { | ||
| method = "POST", | ||
| body = json.encode(body), | ||
| headers = { | ||
| ["Content-Type"] = "application/json", | ||
| }, | ||
| keepalive = conf.keepalive, | ||
| ssl_verify = conf.ssl_verify | ||
| } | ||
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| if conf.keepalive then | ||
| params.keepalive_timeout = conf.keepalive_timeout | ||
| params.keepalive_pool = conf.keepalive_pool | ||
| end | ||
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| local endpoint = conf.host .. "/v1/data/" .. conf.policy | ||
|
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| local httpc = http.new() | ||
| httpc:set_timeout(conf.timeout) | ||
|
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| local res, err = httpc:request_uri(endpoint, params) | ||
|
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| -- block by default when decision is unavailable | ||
| if not res then | ||
| return 403, json.encode({ | ||
| message = "OPA Decision is unavailable. Errors found in policy" | ||
| }) | ||
| end | ||
|
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| -- parse the results of the decision | ||
| local data, err = json.decode(res.body) | ||
|
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| if not data then | ||
| return 503, json.encode({ | ||
| message = "Invalid response body" | ||
| }) | ||
| end | ||
|
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| if not data.result then | ||
| return 503, json.encode({ | ||
| message = "Invalid decision format: " .. res.body .. " Err: `result field does not exist" | ||
| }) | ||
| end | ||
|
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| local result = data.result | ||
|
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| if not result.allow then | ||
| if result.headers then | ||
| core.response.set_header(result.headers) | ||
| end | ||
|
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| local status_code = 403 | ||
| if result.status_code then | ||
| status_code = result.status_code | ||
| end | ||
|
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| local reason = nil | ||
| if result.reason then | ||
| reason = type(result.reason) == "table" | ||
| and json.encode(result.reason) | ||
| or result.reason | ||
| end | ||
|
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| return status_code, reason | ||
| end | ||
| end | ||
|
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|
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| return _M |
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