node.jsamazon-web-servicesmpu

AWS Multipart Upload SignatureDoesNotMatch


I am trying to upload a PDF file to AWS S3 using multi part uploads. However, when I send the PUT request for uploading the part, I receive a SignatureDoesNotMatch error.

<Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message>

My Server Code (Node) is as below:

CREATE MultiPart Upload

const AWS = require('aws-sdk');

AWS.config.region = 'us-east-1';
const s3 = new AWS.S3({ apiVersion: '2006-03-01' });

const s3Params = {
      Bucket: 'bucket-name',
      Key: 'upload-location/filename.pdf',
    }

const createRequest = await s3.createMultipartUpload({
          ...s3Params
          ContentType: 'application/pdf'
        }).promise(); 

GET Signed URL

let getSignedUrlParams = {
      Bucket: 'bucket-name',
      Key: 'upload-location/filename.pdf',
      PartNumber: 1,
      UploadId: 'uploadId',
      Expires: 10 * 60
    }

const signedUrl = await s3.getSignedUrl('uploadPart',getSignedUrlParams);

And the Client code (in JS) is :

const response = await axios.put(signedUrl, chunkedFile, {headers: {'Content-Type':'application-pdf'}});

A few things to note:

  1. This code works when I allow all public access to the bucket.However, if all public access is blocked, the code does not work.
  2. With all public access blocked, I am still able to upload to the bucket with the same credentials using aws cli.
  3. I already have tried re-generating AWS Access Key ID and Secret Access Key and that didnt help.

Not able to figure out what the problem is. Any help would be appreciated.

PS: This is the first question I have posted here. So please forgive me if I havent posted it appropriately. Let me know if more details are required.


Solution

  • What worked for me was the version of the signature. While initializing S3, the signature version should also be mentioned.

    const s3 = new AWS.S3({ apiVersion: '2006-03-01', signatureVersion: 'v4' });