@aws/pdk
Version:
All documentation is located at: https://aws.github.io/aws-pdk
219 lines • 25 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/*! Copyright [Amazon.com](http://amazon.com/), Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0 */
const client_wafv2_1 = require("@aws-sdk/client-wafv2"); // eslint-disable-line
const DELIMITER = ":";
const SCOPE = "CLOUDFRONT";
const client = new client_wafv2_1.WAFV2({
region: "us-east-1",
customUserAgent: "aws-pdk/static-website/waf",
});
const MAX_CREATE_RETRY = 10;
const RETRY_INTERVAL = 2000;
/**
* Handler for creating a WAF V2 ACL in US-EAST-1.
*/
exports.onEvent = async (event) => {
const { ID, MANAGED_RULES, CIDR_ALLOW_LIST } = event.ResourceProperties;
const [WEB_ACL_ID, IP_SET_ID] = event.PhysicalResourceId
? event.PhysicalResourceId.split(DELIMITER)
: [];
let response = {};
switch (event.RequestType) {
case "Create":
response = await createWaf(ID, MANAGED_RULES, CIDR_ALLOW_LIST);
break;
case "Update":
response = await updateWaf(WEB_ACL_ID, IP_SET_ID, ID, getIpSetName(ID), MANAGED_RULES, CIDR_ALLOW_LIST);
break;
case "Delete":
response = await deleteWaf(WEB_ACL_ID, IP_SET_ID, ID, getIpSetName(ID));
break;
default:
throw new Error(`Invalid RequestType: ${event.RequestType}`);
}
return response;
};
/**
* Generates the name of the IP Set.
*
* @param id param passed in.
* @returns name of IP Set.
*/
const getIpSetName = (id) => `${id}-IPSet`;
/**
* Returns a set of rules to apply.
*
* @param ipSetArn ip set arn
* @param ipSetName ip set name
* @param managedRules managed rules
* @param cidrAllowList cidr allow list
* @returns set of rules to apply.
*/
const getWafRules = (ipSetArn, ipSetName, managedRules, cidrAllowList) => {
const rules = [];
if (cidrAllowList) {
rules.push({
Name: ipSetName,
Priority: 1,
VisibilityConfig: {
MetricName: ipSetName,
CloudWatchMetricsEnabled: true,
SampledRequestsEnabled: true,
},
Action: {
Block: {},
},
Statement: {
NotStatement: {
Statement: {
IPSetReferenceStatement: {
ARN: ipSetArn,
},
},
},
},
});
}
if (managedRules) {
rules.push(...managedRules
.map((r) => ({ VendorName: r.vendor, Name: r.name }))
.map((rule, Priority) => ({
Name: `${rule.VendorName}-${rule.Name}`,
Priority,
Statement: { ManagedRuleGroupStatement: rule },
OverrideAction: { None: {} },
VisibilityConfig: {
MetricName: `${rule.VendorName}-${rule.Name}`,
CloudWatchMetricsEnabled: true,
SampledRequestsEnabled: true,
},
})));
}
return rules;
};
const createWaf = async (id, managedRules, cidrAllowList) => {
const ipSetName = getIpSetName(id);
const createIpSetResponse = await client.createIPSet({
Name: ipSetName,
Scope: SCOPE,
Addresses: cidrAllowList?.cidrRanges ?? [],
IPAddressVersion: cidrAllowList?.cidrType ?? "IPV4",
});
const createWebAclResponse = await createWafAcl(id, ipSetName, createIpSetResponse, managedRules, cidrAllowList);
return {
PhysicalResourceId: `${createWebAclResponse.Summary?.Id}${DELIMITER}${createIpSetResponse.Summary?.Id}`,
Data: {
WebAclArn: createWebAclResponse.Summary?.ARN,
WebAclId: createWebAclResponse.Summary?.Id,
IPSetArn: createIpSetResponse.Summary?.ARN,
IPSetId: createIpSetResponse.Summary?.Id,
},
};
};
const createWafAcl = async (id, ipSetName, createIpSetResponse, managedRules, cidrAllowList) => {
let counter = 0;
while (true) {
try {
const createWebAclResponse = await client.createWebACL({
Name: id,
DefaultAction: { Allow: {} },
Scope: SCOPE,
VisibilityConfig: {
CloudWatchMetricsEnabled: true,
MetricName: id,
SampledRequestsEnabled: true,
},
Rules: getWafRules(createIpSetResponse.Summary.ARN, ipSetName, managedRules, cidrAllowList),
});
return createWebAclResponse;
}
catch (e) {
if (e instanceof client_wafv2_1.WAFUnavailableEntityException &&
counter < MAX_CREATE_RETRY) {
counter++;
console.log(`Received error: ${e.message}; Waiting for retrying ${counter}`);
await sleep(RETRY_INTERVAL);
continue;
}
throw e;
}
}
};
const updateWaf = async (webAclId, ipSetId, id, ipSetName, managedRules, cidrAllowList) => {
const getIpSetResponse = await client.getIPSet({
Id: ipSetId,
Name: ipSetName,
Scope: SCOPE,
});
await client.updateIPSet({
Id: ipSetId,
Name: ipSetName,
Addresses: cidrAllowList?.cidrRanges ?? [],
Scope: SCOPE,
LockToken: getIpSetResponse.LockToken,
});
const getWebAclResponse = await client.getWebACL({
Id: webAclId,
Name: id,
Scope: SCOPE,
});
await client.updateWebACL({
Name: id,
DefaultAction: { Allow: {} },
Scope: SCOPE,
VisibilityConfig: {
CloudWatchMetricsEnabled: true,
MetricName: id,
SampledRequestsEnabled: true,
},
Rules: getWafRules(getIpSetResponse.IPSet?.ARN, ipSetName, managedRules, cidrAllowList),
Id: getWebAclResponse.WebACL?.Id,
LockToken: getWebAclResponse.LockToken,
});
return {
Data: {
WebAclArn: getWebAclResponse.WebACL?.ARN,
WebAclId: getWebAclResponse.WebACL?.Id,
IPSetArn: getIpSetResponse.IPSet?.ARN,
IPSetId: getIpSetResponse.IPSet?.Id,
},
};
};
const deleteWaf = async (webAclId, ipSetId, id, ipSetName) => {
const getWebAclResponse = await client.getWebACL({
Id: webAclId,
Name: id,
Scope: SCOPE,
});
await client.deleteWebACL({
Id: webAclId,
Name: id,
Scope: SCOPE,
LockToken: getWebAclResponse.LockToken,
});
const getIpSetResponse = await client.getIPSet({
Id: ipSetId,
Name: ipSetName,
Scope: SCOPE,
});
await client.deleteIPSet({
Id: ipSetId,
Name: ipSetName,
Scope: SCOPE,
LockToken: getIpSetResponse.LockToken,
});
return {
Data: {
WebAclArn: getWebAclResponse.WebACL?.ARN,
WebAclId: getWebAclResponse.WebACL?.Id,
IPSetArn: getIpSetResponse.IPSet?.ARN,
IPSetId: getIpSetResponse.IPSet?.Id,
},
};
};
const sleep = async (duration) => {
return new Promise((resolve) => setTimeout(resolve, duration));
};
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Copyright [Amazon.com](http://amazon.com/), Inc. or its affiliates. All Rights Reserved.\nSPDX-License-Identifier: Apache-2.0 */\nimport { CreateIPSetCommandOutput, Rule, WAFUnavailableEntityException, WAFV2 } from \"@aws-sdk/client-wafv2\"; // eslint-disable-line\n\nconst DELIMITER = \":\";\nconst SCOPE = \"CLOUDFRONT\";\nconst client = new WAFV2({\n  region: \"us-east-1\",\n  customUserAgent: \"aws-pdk/static-website/waf\",\n});\n\nconst MAX_CREATE_RETRY = 10;\nconst RETRY_INTERVAL = 2000;\n\n/**\n * Handler for creating a WAF V2 ACL in US-EAST-1.\n */\nexports.onEvent = async (event: any) => {\n  const { ID, MANAGED_RULES, CIDR_ALLOW_LIST } = event.ResourceProperties;\n  const [WEB_ACL_ID, IP_SET_ID] = event.PhysicalResourceId\n    ? event.PhysicalResourceId.split(DELIMITER)\n    : [];\n  let response = {};\n\n  switch (event.RequestType) {\n    case \"Create\":\n      response = await createWaf(ID, MANAGED_RULES, CIDR_ALLOW_LIST);\n      break;\n    case \"Update\":\n      response = await updateWaf(\n        WEB_ACL_ID,\n        IP_SET_ID,\n        ID,\n        getIpSetName(ID),\n        MANAGED_RULES,\n        CIDR_ALLOW_LIST\n      );\n      break;\n    case \"Delete\":\n      response = await deleteWaf(WEB_ACL_ID, IP_SET_ID, ID, getIpSetName(ID));\n      break;\n    default:\n      throw new Error(`Invalid RequestType: ${event.RequestType}`);\n  }\n\n  return response;\n};\n\n/**\n * Generates the name of the IP Set.\n *\n * @param id param passed in.\n * @returns name of IP Set.\n */\nconst getIpSetName = (id: string) => `${id}-IPSet`;\n\n/**\n * Returns a set of rules to apply.\n *\n * @param ipSetArn ip set arn\n * @param ipSetName  ip set name\n * @param managedRules  managed rules\n * @param cidrAllowList cidr allow list\n * @returns set of rules to apply.\n */\nconst getWafRules = (\n  ipSetArn: string,\n  ipSetName: string,\n  managedRules?: any,\n  cidrAllowList?: any\n): Array<Rule> => {\n  const rules: Array<Rule> = [];\n\n  if (cidrAllowList) {\n    rules.push({\n      Name: ipSetName,\n      Priority: 1,\n      VisibilityConfig: {\n        MetricName: ipSetName,\n        CloudWatchMetricsEnabled: true,\n        SampledRequestsEnabled: true,\n      },\n      Action: {\n        Block: {},\n      },\n      Statement: {\n        NotStatement: {\n          Statement: {\n            IPSetReferenceStatement: {\n              ARN: ipSetArn,\n            },\n          },\n        },\n      },\n    });\n  }\n\n  if (managedRules) {\n    rules.push(\n      ...managedRules\n        .map((r: any) => ({ VendorName: r.vendor, Name: r.name }))\n        .map((rule: any, Priority: any) => ({\n          Name: `${rule.VendorName}-${rule.Name}`,\n          Priority,\n          Statement: { ManagedRuleGroupStatement: rule },\n          OverrideAction: { None: {} },\n          VisibilityConfig: {\n            MetricName: `${rule.VendorName}-${rule.Name}`,\n            CloudWatchMetricsEnabled: true,\n            SampledRequestsEnabled: true,\n          },\n        }))\n    );\n  }\n\n  return rules;\n};\n\nconst createWaf = async (\n  id: string,\n  managedRules?: any,\n  cidrAllowList?: any\n) => {\n  const ipSetName = getIpSetName(id);\n  const createIpSetResponse = await client.createIPSet({\n    Name: ipSetName,\n    Scope: SCOPE,\n    Addresses: cidrAllowList?.cidrRanges ?? [],\n    IPAddressVersion: cidrAllowList?.cidrType ?? \"IPV4\",\n  });\n\n  const createWebAclResponse = await createWafAcl(\n    id,\n    ipSetName,\n    createIpSetResponse,\n    managedRules,\n    cidrAllowList\n  );\n\n  return {\n    PhysicalResourceId: `${createWebAclResponse.Summary?.Id}${DELIMITER}${createIpSetResponse.Summary?.Id}`,\n    Data: {\n      WebAclArn: createWebAclResponse.Summary?.ARN,\n      WebAclId: createWebAclResponse.Summary?.Id,\n      IPSetArn: createIpSetResponse.Summary?.ARN,\n      IPSetId: createIpSetResponse.Summary?.Id,\n    },\n  };\n};\n\nconst createWafAcl = async (\n  id: string,\n  ipSetName: string,\n  createIpSetResponse: CreateIPSetCommandOutput,\n  managedRules?: any,\n  cidrAllowList?: any\n) => {\n  let counter = 0;\n\n  while (true) {\n    try {\n      const createWebAclResponse = await client.createWebACL({\n        Name: id,\n        DefaultAction: { Allow: {} },\n        Scope: SCOPE,\n        VisibilityConfig: {\n          CloudWatchMetricsEnabled: true,\n          MetricName: id,\n          SampledRequestsEnabled: true,\n        },\n        Rules: getWafRules(\n          createIpSetResponse.Summary!.ARN!,\n          ipSetName,\n          managedRules,\n          cidrAllowList\n        ),\n      });\n\n      return createWebAclResponse;\n    } catch (e) {\n      if (\n        e instanceof WAFUnavailableEntityException &&\n        counter < MAX_CREATE_RETRY\n      ) {\n        counter++;\n        console.log(\n          `Received error: ${e.message}; Waiting for retrying ${counter}`\n        );\n        await sleep(RETRY_INTERVAL);\n        continue;\n      }\n\n      throw e;\n    }\n  }\n};\n\nconst updateWaf = async (\n  webAclId: string,\n  ipSetId: string,\n  id: string,\n  ipSetName: string,\n  managedRules?: any,\n  cidrAllowList?: any\n) => {\n  const getIpSetResponse = await client.getIPSet({\n    Id: ipSetId,\n    Name: ipSetName,\n    Scope: SCOPE,\n  });\n\n  await client.updateIPSet({\n    Id: ipSetId,\n    Name: ipSetName,\n    Addresses: cidrAllowList?.cidrRanges ?? [],\n    Scope: SCOPE,\n    LockToken: getIpSetResponse.LockToken!,\n  });\n\n  const getWebAclResponse = await client.getWebACL({\n    Id: webAclId,\n    Name: id,\n    Scope: SCOPE,\n  });\n\n  await client.updateWebACL({\n    Name: id,\n    DefaultAction: { Allow: {} },\n    Scope: SCOPE,\n    VisibilityConfig: {\n      CloudWatchMetricsEnabled: true,\n      MetricName: id,\n      SampledRequestsEnabled: true,\n    },\n    Rules: getWafRules(\n      getIpSetResponse.IPSet?.ARN!,\n      ipSetName,\n      managedRules,\n      cidrAllowList\n    ),\n    Id: getWebAclResponse.WebACL?.Id!,\n    LockToken: getWebAclResponse.LockToken!,\n  });\n\n  return {\n    Data: {\n      WebAclArn: getWebAclResponse.WebACL?.ARN,\n      WebAclId: getWebAclResponse.WebACL?.Id,\n      IPSetArn: getIpSetResponse.IPSet?.ARN,\n      IPSetId: getIpSetResponse.IPSet?.Id,\n    },\n  };\n};\n\nconst deleteWaf = async (\n  webAclId: string,\n  ipSetId: string,\n  id: string,\n  ipSetName: string\n) => {\n  const getWebAclResponse = await client.getWebACL({\n    Id: webAclId,\n    Name: id,\n    Scope: SCOPE,\n  });\n\n  await client.deleteWebACL({\n    Id: webAclId,\n    Name: id,\n    Scope: SCOPE,\n    LockToken: getWebAclResponse.LockToken!,\n  });\n\n  const getIpSetResponse = await client.getIPSet({\n    Id: ipSetId,\n    Name: ipSetName,\n    Scope: SCOPE,\n  });\n\n  await client.deleteIPSet({\n    Id: ipSetId,\n    Name: ipSetName,\n    Scope: SCOPE,\n    LockToken: getIpSetResponse.LockToken!,\n  });\n\n  return {\n    Data: {\n      WebAclArn: getWebAclResponse.WebACL?.ARN,\n      WebAclId: getWebAclResponse.WebACL?.Id,\n      IPSetArn: getIpSetResponse.IPSet?.ARN,\n      IPSetId: getIpSetResponse.IPSet?.Id,\n    },\n  };\n};\n\nconst sleep = async (duration: number) => {\n  return new Promise((resolve) => setTimeout(resolve, duration));\n};\n"]}