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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 | 3x 3x 9x 9x 2x 5x 5x 5x 1x 4x 4x 4x 4x 4x 4x 4x 5x 5x 4x 4x 1x 1x 3x 4x 3x 4x 3x 3x 3x 3x 3x 3x 6x 6x 9x 5x 5x 5x 5x | /* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. Licensed 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. */ import { ConfigServiceClient } from "@aws-sdk/client-config-service"; import { FlowObject, FlowRuleBundle, ResolvedFlowObject, TaggedTargetValue, } from "../../FlowDefinitions"; import { LoggerFactory } from "../../logger-factory"; import { Logger } from "../../logger-type"; import { CloudResourceObjectResolver } from "./CloudResourceObjectResolver"; type TagValuePair = { key: string; value: string }; type SubnetAndSecurityGroupPairIdExtractor = ( c: SubnetAndSecurityGroupPair ) => string[]; type SubnetAndSecurityGroupPair = { configuration: { vpcConfig: { subnetIds: Array<string>; securityGroupIds: Array<string>; }; }; }; export type EniRelationship = { relationshipName: string; resourceId: string; resourceType: string; }; export type EniResourceMapping = { resourceId: string; //eni resource id relationships: Array<EniRelationship>; }; export class LambdaObjectResolver extends CloudResourceObjectResolver { logger: Logger; constructor( loggerFactory: LoggerFactory, configServiceClient: ConfigServiceClient, defaultAggregatorName?: string ) { super(configServiceClient, defaultAggregatorName); this.logger = loggerFactory.getLogger("LambdaObjectResolver"); } canResolve(ruleObject: FlowObject): boolean { return ruleObject.type === "Lambda"; } async resolve( object: FlowObject, ruleGroup?: FlowRuleBundle ): Promise<ResolvedFlowObject> { const tagValues = <TaggedTargetValue[]>object.value; this.logger.info("parsed lambda tagValues", tagValues); if (!this.isValidTagValue(tagValues)) { return { ...object, addresses: [], // eslint-disable-next-line @typescript-eslint/no-explicit-any failureReasons: ["Invalid tag value"], }; } const tagsQueryString = tagValues .map((elm) => `tags.key = '${elm.key}' AND tags.value = '${elm.value}'`) .join(" AND "); const configAdvancedQueryString = `SELECT configuration.vpcConfig.subnetIds,configuration.vpcConfig.securityGroupIds WHERE resourceType = 'AWS::Lambda::Function' AND ${tagsQueryString}`; this.logger.info(`configAdvancedQueryString ${configAdvancedQueryString}`); const results = await this.queryAwsConfig( ruleGroup, configAdvancedQueryString ); this.logger.info("resolve target result", results); const subnetAndSecurityGroupPairs = results ?.map((r) => <SubnetAndSecurityGroupPair>JSON.parse(r)) .filter((i) => i); this.logger.info( "resolved subnet/securityGroup ids", subnetAndSecurityGroupPairs ); if (subnetAndSecurityGroupPairs?.length === 0) { this.logger.warn( "no lambda with in VPC matching the given tags", tagValues ); return this.parseResult(this.logger, results, object); } const uniqueSecurityGroupSubQueryString = this.extractUniqueIds( subnetAndSecurityGroupPairs, (c) => c.configuration.vpcConfig.securityGroupIds ); const uniqueSubnetIdsSubQueryString = this.extractUniqueIds( subnetAndSecurityGroupPairs, (c) => c.configuration.vpcConfig.subnetIds ); const subQuery = `relationships.resourceId IN ('${uniqueSecurityGroupSubQueryString}') AND relationships.resourceId IN ('${uniqueSubnetIdsSubQueryString}')`; const matchingEniQueryString = `SELECT configuration.privateIpAddress WHERE resourceType = 'AWS::EC2::NetworkInterface'`; const matchingEniQueryFull = matchingEniQueryString + " AND " + subQuery; this.logger.info(`querying for matching eni ${matchingEniQueryFull}`); const matchingEniQueryResult = await this.queryAwsConfig( ruleGroup, matchingEniQueryFull ); return this.parseResult(this.logger, matchingEniQueryResult, object); } private extractUniqueIds( subnetAndSecurityGroupPairs: SubnetAndSecurityGroupPair[] | undefined, extractorFn: SubnetAndSecurityGroupPairIdExtractor ) { const allSecurityGroupIds = subnetAndSecurityGroupPairs?.flatMap(extractorFn); return [...new Set(allSecurityGroupIds)].join("','"); } private isBlank(input: string): boolean { return !input || /^\s*$/.test(input); } isValidTagValue(value: unknown): boolean { Iif (!Array.isArray(value)) { return false; } const listOfTags: TagValuePair[] = value as TagValuePair[]; return listOfTags.some( (t) => !this.isBlank(t.key) && !this.isBlank(t.value) ); } } |