Initial

resources/app/node_modules/@smithy/credential-provider-imds/dist-es/fromInstanceMetadata.js

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+import { loadConfig } from "@smithy/node-config-provider";
+import { CredentialsProviderError } from "@smithy/property-provider";
+import { InstanceMetadataV1FallbackError } from "./error/InstanceMetadataV1FallbackError";
+import { httpRequest } from "./remoteProvider/httpRequest";
+import { fromImdsCredentials, isImdsCredentials } from "./remoteProvider/ImdsCredentials";
+import { providerConfigFromInit } from "./remoteProvider/RemoteProviderInit";
+import { retry } from "./remoteProvider/retry";
+import { getInstanceMetadataEndpoint } from "./utils/getInstanceMetadataEndpoint";
+import { staticStabilityProvider } from "./utils/staticStabilityProvider";
+const IMDS_PATH = "/latest/meta-data/iam/security-credentials/";
+const IMDS_TOKEN_PATH = "/latest/api/token";
+const AWS_EC2_METADATA_V1_DISABLED = "AWS_EC2_METADATA_V1_DISABLED";
+const PROFILE_AWS_EC2_METADATA_V1_DISABLED = "ec2_metadata_v1_disabled";
+const X_AWS_EC2_METADATA_TOKEN = "x-aws-ec2-metadata-token";
+export const fromInstanceMetadata = (init = {}) => staticStabilityProvider(getInstanceImdsProvider(init), { logger: init.logger });
+const getInstanceImdsProvider = (init) => {
+    let disableFetchToken = false;
+    const { logger, profile } = init;
+    const { timeout, maxRetries } = providerConfigFromInit(init);
+    const getCredentials = async (maxRetries, options) => {
+        const isImdsV1Fallback = disableFetchToken || options.headers?.[X_AWS_EC2_METADATA_TOKEN] == null;
+        if (isImdsV1Fallback) {
+            let fallbackBlockedFromProfile = false;
+            let fallbackBlockedFromProcessEnv = false;
+            const configValue = await loadConfig({
+                environmentVariableSelector: (env) => {
+                    const envValue = env[AWS_EC2_METADATA_V1_DISABLED];
+                    fallbackBlockedFromProcessEnv = !!envValue && envValue !== "false";
+                    if (envValue === undefined) {
+                        throw new CredentialsProviderError(`${AWS_EC2_METADATA_V1_DISABLED} not set in env, checking config file next.`);
+                    }
+                    return fallbackBlockedFromProcessEnv;
+                },
+                configFileSelector: (profile) => {
+                    const profileValue = profile[PROFILE_AWS_EC2_METADATA_V1_DISABLED];
+                    fallbackBlockedFromProfile = !!profileValue && profileValue !== "false";
+                    return fallbackBlockedFromProfile;
+                },
+                default: false,
+            }, {
+                profile,
+            })();
+            if (init.ec2MetadataV1Disabled || configValue) {
+                const causes = [];
+                if (init.ec2MetadataV1Disabled)
+                    causes.push("credential provider initialization (runtime option ec2MetadataV1Disabled)");
+                if (fallbackBlockedFromProfile)
+                    causes.push(`config file profile (${PROFILE_AWS_EC2_METADATA_V1_DISABLED})`);
+                if (fallbackBlockedFromProcessEnv)
+                    causes.push(`process environment variable (${AWS_EC2_METADATA_V1_DISABLED})`);
+                throw new InstanceMetadataV1FallbackError(`AWS EC2 Metadata v1 fallback has been blocked by AWS SDK configuration in the following: [${causes.join(", ")}].`);
+            }
+        }
+        const imdsProfile = (await retry(async () => {
+            let profile;
+            try {
+                profile = await getProfile(options);
+            }
+            catch (err) {
+                if (err.statusCode === 401) {
+                    disableFetchToken = false;
+                }
+                throw err;
+            }
+            return profile;
+        }, maxRetries)).trim();
+        return retry(async () => {
+            let creds;
+            try {
+                creds = await getCredentialsFromProfile(imdsProfile, options);
+            }
+            catch (err) {
+                if (err.statusCode === 401) {
+                    disableFetchToken = false;
+                }
+                throw err;
+            }
+            return creds;
+        }, maxRetries);
+    };
+    return async () => {
+        const endpoint = await getInstanceMetadataEndpoint();
+        if (disableFetchToken) {
+            logger?.debug("AWS SDK Instance Metadata", "using v1 fallback (no token fetch)");
+            return getCredentials(maxRetries, { ...endpoint, timeout });
+        }
+        else {
+            let token;
+            try {
+                token = (await getMetadataToken({ ...endpoint, timeout })).toString();
+            }
+            catch (error) {
+                if (error?.statusCode === 400) {
+                    throw Object.assign(error, {
+                        message: "EC2 Metadata token request returned error",
+                    });
+                }
+                else if (error.message === "TimeoutError" || [403, 404, 405].includes(error.statusCode)) {
+                    disableFetchToken = true;
+                }
+                logger?.debug("AWS SDK Instance Metadata", "using v1 fallback (initial)");
+                return getCredentials(maxRetries, { ...endpoint, timeout });
+            }
+            return getCredentials(maxRetries, {
+                ...endpoint,
+                headers: {
+                    [X_AWS_EC2_METADATA_TOKEN]: token,
+                },
+                timeout,
+            });
+        }
+    };
+};
+const getMetadataToken = async (options) => httpRequest({
+    ...options,
+    path: IMDS_TOKEN_PATH,
+    method: "PUT",
+    headers: {
+        "x-aws-ec2-metadata-token-ttl-seconds": "21600",
+    },
+});
+const getProfile = async (options) => (await httpRequest({ ...options, path: IMDS_PATH })).toString();
+const getCredentialsFromProfile = async (profile, options) => {
+    const credsResponse = JSON.parse((await httpRequest({
+        ...options,
+        path: IMDS_PATH + profile,
+    })).toString());
+    if (!isImdsCredentials(credsResponse)) {
+        throw new CredentialsProviderError("Invalid response received from instance metadata service.");
+    }
+    return fromImdsCredentials(credsResponse);
+};