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Viewing file:     awsAuthMiddleware.js (3.41 KB)      -rw-r--r--

import { HttpRequest, HttpResponse } from "@smithy/protocol-http";
import { getSkewCorrectedDate } from "./utils/getSkewCorrectedDate";
import { getUpdatedSystemClockOffset } from "./utils/getUpdatedSystemClockOffset";
export const awsAuthMiddleware = (options) => (next, context) => async function (args) {
    if (!HttpRequest.isInstance(args.request))
        return next(args);
    let authScheme;
    let signer;
    const firstAuthScheme = context.endpointV2?.properties?.authSchemes?.[0];
    const secondAuthScheme = context.endpointV2?.properties?.authSchemes?.[1];
    const firstAuthSchemeIsSigv4a = firstAuthScheme?.name === "sigv4a";
    if (firstAuthSchemeIsSigv4a && secondAuthScheme) {
        signer = await options.signer((authScheme = firstAuthScheme));
        const uncheckedSigner = signer;
        const sigv4aAvailable = (() => {
            if (typeof uncheckedSigner?.getSigv4aSigner === "function") {
                if (uncheckedSigner?.signerOptions?.runtime !== "node") {
                    return false;
                }
                try {
                    uncheckedSigner.getSigv4aSigner();
                    return true;
                }
                catch (e) { }
            }
            return false;
        })();
        if (!sigv4aAvailable) {
            signer = await options.signer((authScheme = secondAuthScheme));
        }
    }
    else {
        signer = await options.signer((authScheme = firstAuthScheme));
    }
    let signedRequest;
    const multiRegionOverride = authScheme?.name === "sigv4a" ? authScheme?.signingRegionSet?.join(",") : undefined;
    const signingOptions = {
        signingDate: getSkewCorrectedDate(options.systemClockOffset),
        signingRegion: multiRegionOverride || context["signing_region"],
        signingService: context["signing_service"],
    };
    if (context.s3ExpressIdentity) {
        const sigV4MultiRegion = signer;
        signedRequest = await sigV4MultiRegion.signWithCredentials(args.request, context.s3ExpressIdentity, signingOptions);
        if (signedRequest.headers["X-Amz-Security-Token"] || signedRequest.headers["x-amz-security-token"]) {
            throw new Error("X-Amz-Security-Token must not be set for s3-express requests.");
        }
    }
    else {
        signedRequest = await signer.sign(args.request, signingOptions);
    }
    const output = await next({
        ...args,
        request: signedRequest,
    }).catch((error) => {
        const serverTime = error.ServerTime ?? getDateHeader(error.$response);
        if (serverTime) {
            options.systemClockOffset = getUpdatedSystemClockOffset(serverTime, options.systemClockOffset);
        }
        throw error;
    });
    const dateHeader = getDateHeader(output.response);
    if (dateHeader) {
        options.systemClockOffset = getUpdatedSystemClockOffset(dateHeader, options.systemClockOffset);
    }
    return output;
};
const getDateHeader = (response) => HttpResponse.isInstance(response) ? response.headers?.date ?? response.headers?.Date : undefined;
export const awsAuthMiddlewareOptions = {
    name: "awsAuthMiddleware",
    tags: ["SIGNATURE", "AWSAUTH"],
    relation: "after",
    toMiddleware: "retryMiddleware",
    override: true,
};
export const getAwsAuthPlugin = (options) => ({
    applyToStack: (clientStack) => {
        clientStack.addRelativeTo(awsAuthMiddleware(options), awsAuthMiddlewareOptions);
    },
});
export const getSigV4AuthPlugin = getAwsAuthPlugin;