aws-cdk
Version:
CDK Toolkit, the command line tool for CDK apps
135 lines • 20.6 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.PatchedSharedIniFileCredentials = void 0;
const AWS = require("aws-sdk");
/**
* Hack-fix
*
* There are a number of issues in the upstream version of SharedIniFileCredentials
* that need fixing:
*
* 1. The upstream aws-sdk does not support the 'credential_source' option. Meaning credentials
* for assume-role cannot be fetched using EC2/ESC metadata.
*
* 2. The upstream aws-sdk does not support SSO profiles as the source of RoleProfiles,
* because it will always use the `SharedIniFileCredentials` provider to load
* source credentials, but in order to support SSO profiles you must use a
* separate class (`SsoCredentials).
*/
class PatchedSharedIniFileCredentials extends AWS.SharedIniFileCredentials {
loadRoleProfile(creds, roleProfile, callback) {
// Need to duplicate the whole implementation here -- the function is long and has been written in
// such a way that there are no small monkey patches possible.
if (this.disableAssumeRole) {
throw AWS.util.error(new Error('Role assumption profiles are disabled. ' +
'Failed to load profile ' + this.profile +
' from ' + creds.filename), { code: 'SharedIniFileCredentialsProviderFailure' });
}
var self = this;
var roleArn = roleProfile.role_arn;
var roleSessionName = roleProfile.role_session_name;
var externalId = roleProfile.external_id;
var mfaSerial = roleProfile.mfa_serial;
var sourceProfile = roleProfile.source_profile;
var credentialSource = roleProfile.credential_source;
if (!!sourceProfile === !!credentialSource) {
throw AWS.util.error(new Error(`When using 'role_arn' in profile ('${this.profile}'), you must also configure exactly one of 'source_profile' or 'credential_source'`), { code: 'SharedIniFileCredentialsProviderFailure' });
}
// Confirmed this against AWS CLI behavior -- the region must be in the assumED profile,
// otherwise `us-east-1`. From the upstream comment in `aws-sdk-js`:
// -------- comment from aws-sdk-js -------------------
// Experimentation shows that the AWS CLI (tested at version 1.18.136)
// ignores the following potential sources of a region for the purposes of
// this AssumeRole call:
//
// - The [default] profile
// - The AWS_REGION environment variable
//
// Ignoring the [default] profile for the purposes of AssumeRole is arguably
// a bug in the CLI since it does use the [default] region for service
// calls... but right now we're matching behavior of the other tool.
// -------------------------------------------------
const region = roleProfile?.region ?? 'us-east-1';
const stsCreds = sourceProfile ? this.sourceProfileCredentials(sourceProfile, creds) : this.credentialSourceCredentials(credentialSource);
this.roleArn = roleArn;
var sts = new AWS.STS({
credentials: stsCreds,
region,
httpOptions: this.httpOptions,
});
var roleParams = {
RoleArn: roleArn,
RoleSessionName: roleSessionName || 'aws-sdk-js-' + Date.now(),
};
if (externalId) {
roleParams.ExternalId = externalId;
}
if (mfaSerial && self.tokenCodeFn) {
roleParams.SerialNumber = mfaSerial;
self.tokenCodeFn(mfaSerial, function (err, token) {
if (err) {
var message;
if (err instanceof Error) {
message = err.message;
}
else {
message = err;
}
callback(AWS.util.error(new Error('Error fetching MFA token: ' + message), { code: 'SharedIniFileCredentialsProviderFailure' }));
return;
}
roleParams.TokenCode = token;
sts.assumeRole(roleParams, callback);
});
return;
}
sts.assumeRole(roleParams, callback);
}
sourceProfileCredentials(sourceProfile, profiles) {
var sourceProfileExistanceTest = profiles[sourceProfile];
if (typeof sourceProfileExistanceTest !== 'object') {
throw AWS.util.error(new Error('source_profile ' + sourceProfile + ' using profile '
+ this.profile + ' does not exist'), { code: 'SharedIniFileCredentialsProviderFailure' });
}
// We need to do a manual check here if the source profile (providing the
// credentials for the AssumeRole) is an SSO profile. That's because
// `SharedIniFileCredentials` itself doesn't support providing credentials from
// arbitrary profiles, only for StaticCredentials and AssumeRole type
// profiles; if it's an SSO profile you need to instantiate a special
// Credential Provider for that.
//
// ---
//
// An SSO profile can be configured in 2 ways (put all the info in the profile
// section, or put half of it in an `[sso-session]` block), but in both cases
// the primary profile block must have the `sso_account_id` key
if (sourceProfileExistanceTest.sso_account_id) {
return new AWS.SsoCredentials({ profile: sourceProfile });
}
return new PatchedSharedIniFileCredentials(AWS.util.merge(this.options || {}, {
profile: sourceProfile,
preferStaticCredentials: true,
}));
}
// the aws-sdk for js does not support 'credential_source' (https://github.com/aws/aws-sdk-js/issues/1916)
// so unfortunately we need to implement this ourselves.
credentialSourceCredentials(sourceCredential) {
// see https://docs.aws.amazon.com/credref/latest/refdocs/setting-global-credential_source.html
switch (sourceCredential) {
case 'Environment': {
return new AWS.EnvironmentCredentials('AWS');
}
case 'Ec2InstanceMetadata': {
return new AWS.EC2MetadataCredentials();
}
case 'EcsContainer': {
return new AWS.ECSCredentials();
}
default: {
throw new Error(`credential_source ${sourceCredential} in profile ${this.profile} is unsupported. choose one of [Environment, Ec2InstanceMetadata, EcsContainer]`);
}
}
}
}
exports.PatchedSharedIniFileCredentials = PatchedSharedIniFileCredentials;
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The upstream aws-sdk does not support the 'credential_source' option. Meaning credentials\n *    for assume-role cannot be fetched using EC2/ESC metadata.\n *\n * 2. The upstream aws-sdk does not support SSO profiles as the source of RoleProfiles,\n *    because it will always use the `SharedIniFileCredentials` provider to load\n *    source credentials, but in order to support SSO profiles you must use a\n *    separate class (`SsoCredentials).\n */\nexport class PatchedSharedIniFileCredentials extends AWS.SharedIniFileCredentials {\n  declare private profile: string;\n  declare private filename: string;\n  declare private disableAssumeRole: boolean;\n  declare private options: Record<string, string>;\n  declare private roleArn: string;\n  declare private httpOptions?: AWS.HTTPOptions;\n  declare private tokenCodeFn?: (mfaSerial: string, callback: (err?: Error, token?: string) => void) => void;\n\n  public loadRoleProfile(\n    creds: Record<string, Record<string, string>>,\n    roleProfile: Record<string, string>,\n    callback: (err?: Error, data?: any) => void) {\n\n    // Need to duplicate the whole implementation here -- the function is long and has been written in\n    // such a way that there are no small monkey patches possible.\n\n    if (this.disableAssumeRole) {\n      throw (AWS as any).util.error(\n        new Error('Role assumption profiles are disabled. ' +\n                  'Failed to load profile ' + this.profile +\n                  ' from ' + creds.filename),\n        { code: 'SharedIniFileCredentialsProviderFailure' },\n      );\n    }\n\n    var self = this;\n    var roleArn = roleProfile.role_arn;\n    var roleSessionName = roleProfile.role_session_name;\n    var externalId = roleProfile.external_id;\n    var mfaSerial = roleProfile.mfa_serial;\n    var sourceProfile = roleProfile.source_profile;\n    var credentialSource = roleProfile.credential_source;\n\n    if (!!sourceProfile === !!credentialSource) {\n      throw (AWS as any).util.error(\n        new Error(`When using 'role_arn' in profile ('${this.profile}'), you must also configure exactly one of 'source_profile' or 'credential_source'`),\n        { code: 'SharedIniFileCredentialsProviderFailure' },\n      );\n    }\n\n    // Confirmed this against AWS CLI behavior -- the region must be in the assumED profile,\n    // otherwise `us-east-1`. From the upstream comment in `aws-sdk-js`:\n    // -------- comment from aws-sdk-js -------------------\n    // Experimentation shows that the AWS CLI (tested at version 1.18.136)\n    // ignores the following potential sources of a region for the purposes of\n    // this AssumeRole call:\n    //\n    // - The [default] profile\n    // - The AWS_REGION environment variable\n    //\n    // Ignoring the [default] profile for the purposes of AssumeRole is arguably\n    // a bug in the CLI since it does use the [default] region for service\n    // calls... but right now we're matching behavior of the other tool.\n    // -------------------------------------------------\n\n    const region = roleProfile?.region ?? 'us-east-1';\n\n    const stsCreds = sourceProfile ? this.sourceProfileCredentials(sourceProfile, creds) : this.credentialSourceCredentials(credentialSource);\n\n    this.roleArn = roleArn;\n    var sts = new AWS.STS({\n      credentials: stsCreds,\n      region,\n      httpOptions: this.httpOptions,\n    });\n\n    var roleParams: AWS.STS.AssumeRoleRequest = {\n      RoleArn: roleArn,\n      RoleSessionName: roleSessionName || 'aws-sdk-js-' + Date.now(),\n    };\n\n    if (externalId) {\n      roleParams.ExternalId = externalId;\n    }\n\n    if (mfaSerial && self.tokenCodeFn) {\n      roleParams.SerialNumber = mfaSerial;\n      self.tokenCodeFn(mfaSerial, function(err, token) {\n        if (err) {\n          var message;\n          if (err instanceof Error) {\n            message = err.message;\n          } else {\n            message = err;\n          }\n          callback(\n            (AWS as any).util.error(\n              new Error('Error fetching MFA token: ' + message),\n              { code: 'SharedIniFileCredentialsProviderFailure' },\n            ));\n          return;\n        }\n\n        roleParams.TokenCode = token;\n        sts.assumeRole(roleParams, callback);\n      });\n      return;\n    }\n    sts.assumeRole(roleParams, callback);\n  }\n\n  private sourceProfileCredentials(sourceProfile: string, profiles: Record<string, Record<string, string>>) {\n    var sourceProfileExistanceTest = profiles[sourceProfile];\n\n    if (typeof sourceProfileExistanceTest !== 'object') {\n      throw (AWS as any).util.error(\n        new Error('source_profile ' + sourceProfile + ' using profile '\n          + this.profile + ' does not exist'),\n        { code: 'SharedIniFileCredentialsProviderFailure' },\n      );\n    }\n\n    // We need to do a manual check here if the source profile (providing the\n    // credentials for the AssumeRole) is an SSO profile. That's because\n    // `SharedIniFileCredentials` itself doesn't support providing credentials from\n    // arbitrary profiles, only for StaticCredentials and AssumeRole type\n    // profiles; if it's an SSO profile you need to instantiate a special\n    // Credential Provider for that.\n    //\n    // ---\n    //\n    // An SSO profile can be configured in 2 ways (put all the info in the profile\n    // section, or put half of it in an `[sso-session]` block), but in both cases\n    // the primary profile block must have the `sso_account_id` key\n    if (sourceProfileExistanceTest.sso_account_id) {\n      return new AWS.SsoCredentials({ profile: sourceProfile });\n    }\n\n    return new PatchedSharedIniFileCredentials(\n      (AWS as any).util.merge(this.options || {}, {\n        profile: sourceProfile,\n        preferStaticCredentials: true,\n      }),\n    );\n\n  }\n\n  // the aws-sdk for js does not support 'credential_source' (https://github.com/aws/aws-sdk-js/issues/1916)\n  // so unfortunately we need to implement this ourselves.\n  private credentialSourceCredentials(sourceCredential: string) {\n    // see https://docs.aws.amazon.com/credref/latest/refdocs/setting-global-credential_source.html\n    switch (sourceCredential) {\n      case 'Environment': {\n        return new AWS.EnvironmentCredentials('AWS');\n      }\n      case 'Ec2InstanceMetadata': {\n        return new AWS.EC2MetadataCredentials();\n      }\n      case 'EcsContainer': {\n        return new AWS.ECSCredentials();\n      }\n      default: {\n        throw new Error(`credential_source ${sourceCredential} in profile ${this.profile} is unsupported. choose one of [Environment, Ec2InstanceMetadata, EcsContainer]`);\n      }\n    }\n\n  }\n}\n"]}