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Viewing file:     fromContainerMetadata.js (2.96 KB)      -rw-r--r--

import { CredentialsProviderError } from "@smithy/property-provider";
import { parse } from "url";
import { httpRequest } from "./remoteProvider/httpRequest";
import { fromImdsCredentials, isImdsCredentials } from "./remoteProvider/ImdsCredentials";
import { providerConfigFromInit } from "./remoteProvider/RemoteProviderInit";
import { retry } from "./remoteProvider/retry";
export const ENV_CMDS_FULL_URI = "AWS_CONTAINER_CREDENTIALS_FULL_URI";
export const ENV_CMDS_RELATIVE_URI = "AWS_CONTAINER_CREDENTIALS_RELATIVE_URI";
export const ENV_CMDS_AUTH_TOKEN = "AWS_CONTAINER_AUTHORIZATION_TOKEN";
export const fromContainerMetadata = (init = {}) => {
    const { timeout, maxRetries } = providerConfigFromInit(init);
    return () => retry(async () => {
        const requestOptions = await getCmdsUri({ logger: init.logger });
        const credsResponse = JSON.parse(await requestFromEcsImds(timeout, requestOptions));
        if (!isImdsCredentials(credsResponse)) {
            throw new CredentialsProviderError("Invalid response received from instance metadata service.", {
                logger: init.logger,
            });
        }
        return fromImdsCredentials(credsResponse);
    }, maxRetries);
};
const requestFromEcsImds = async (timeout, options) => {
    if (process.env[ENV_CMDS_AUTH_TOKEN]) {
        options.headers = {
            ...options.headers,
            Authorization: process.env[ENV_CMDS_AUTH_TOKEN],
        };
    }
    const buffer = await httpRequest({
        ...options,
        timeout,
    });
    return buffer.toString();
};
const CMDS_IP = "169.254.170.2";
const GREENGRASS_HOSTS = {
    localhost: true,
    "127.0.0.1": true,
};
const GREENGRASS_PROTOCOLS = {
    "http:": true,
    "https:": true,
};
const getCmdsUri = async ({ logger }) => {
    if (process.env[ENV_CMDS_RELATIVE_URI]) {
        return {
            hostname: CMDS_IP,
            path: process.env[ENV_CMDS_RELATIVE_URI],
        };
    }
    if (process.env[ENV_CMDS_FULL_URI]) {
        const parsed = parse(process.env[ENV_CMDS_FULL_URI]);
        if (!parsed.hostname || !(parsed.hostname in GREENGRASS_HOSTS)) {
            throw new CredentialsProviderError(`${parsed.hostname} is not a valid container metadata service hostname`, {
                tryNextLink: false,
                logger,
            });
        }
        if (!parsed.protocol || !(parsed.protocol in GREENGRASS_PROTOCOLS)) {
            throw new CredentialsProviderError(`${parsed.protocol} is not a valid container metadata service protocol`, {
                tryNextLink: false,
                logger,
            });
        }
        return {
            ...parsed,
            port: parsed.port ? parseInt(parsed.port, 10) : undefined,
        };
    }
    throw new CredentialsProviderError("The container metadata credential provider cannot be used unless" +
        ` the ${ENV_CMDS_RELATIVE_URI} or ${ENV_CMDS_FULL_URI} environment` +
        " variable is set", {
        tryNextLink: false,
        logger,
    });
};