chore(middleware-flexible-checksums): use RequestChecksumCalculation and ResponseChecksumValidation

[trivikr]

Issue

• Internal JS-5396
• Alternative to chore(middleware-flexible-checksums): use RequestChecksumCalculation and ResponseChecksumValidation without interceptor middleware #6484 with flexibleChecksumsInterceptorMiddleware

Description

• Uses values in RequestChecksumCalculation and ResponseChecksumValidation to decide flexible checksums algorithm.
• Adds flexibleChecksumsInterceptorMiddleware to populate input[requestValidationModeMember]
• Deprecates MD5, and sets CRC32 as default.

Testing

Unit testing in CI

Also, verified that checksums are computed by default

import { S3 } from "../aws-sdk-js-v3/clients/client-s3/dist-cjs/index.js";
import { NodeHttpHandler } from "@smithy/node-http-handler";
import { equal } from "assert";

// Prints checksum headers for request and response.
class CustomHandler extends NodeHttpHandler {
  constructor() {
    super();
  }

  printChecksumHeaders(prefix, headers) {
    for (const [header, value] of Object.entries(headers)) {
      if (header.startsWith("x-amz-checksum-")) {
        console.log(`${prefix}['${header}']: '${value}'`);
      }
    }
  }

  async handle(request, options) {
    this.printChecksumHeaders("request", request.headers);
    const response = await super.handle(request, options);
    this.printChecksumHeaders("response", response.response.headers);
    return response;
  }
}

// WHEN_SUPPORTED is default.
const client = new S3({
  requestHandler: new CustomHandler(),
});
const Bucket = "test-flexible-checksums-v2"; // Replace with your test bucket name.
const Key = "hello-world.txt";
const Body = "Hello World"; // Replace with the content you want to test.

console.log("Put Object");
// ChecksumAlgorithm is not explicitly required to be specified.
await client.putObject({ Bucket, Key, Body });

console.log("\nGet Object");
// ChecksumMode is not explicitly required to be specified.
const response = await client.getObject({ Bucket, Key });

equal(Body, await response.Body.transformToString());

Output

Put Object
request['x-amz-checksum-sha256']: 'pZGm1Av0IEBKARczz7exkNYsZb8LzaMrV7J32a2fFG4='
response['x-amz-checksum-sha256']: 'pZGm1Av0IEBKARczz7exkNYsZb8LzaMrV7J32a2fFG4='

Get Object
request['x-amz-checksum-mode']: 'ENABLED'
request['x-amz-checksum-sha256']: '47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU='
response['x-amz-checksum-sha256']: 'pZGm1Av0IEBKARczz7exkNYsZb8LzaMrV7J32a2fFG4='

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[trivikr]

The PR is ready for review. It's marked as draft, as it shouldn't be merged at this time.

[trivikr]

The default checksum is changed from CRC32 to SHA256 based on benchmarks provided in #6499