The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256

Question

I get an error AWS::S3::Errors::InvalidRequest The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256. when I try upload fi

Answer 1

Code for Flask (boto3)

Don't forget to import Config. Also If you have your own config class, then change its name.

from botocore.client import Config

s3 = boto3.client('s3',config=Config(signature_version='s3v4'),region_name=app.config["AWS_REGION"],aws_access_key_id=app.config['AWS_ACCESS_KEY'], aws_secret_access_key=app.config['AWS_SECRET_KEY'])
s3.upload_fileobj(file,app.config["AWS_BUCKET_NAME"],file.filename)
url = s3.generate_presigned_url('get_object', Params = {'Bucket':app.config["AWS_BUCKET_NAME"] , 'Key': file.filename}, ExpiresIn = 10000)

Answer 2

Sometime the default version will not update. Add this command

AWS_S3_SIGNATURE_VERSION = "s3v4"

in settings.py

Answer 3

For thumbor-aws, that used boto config, i needed to put this to the $AWS_CONFIG_FILE

[default]
aws_access_key_id = (your ID)
aws_secret_access_key = (your secret key)
s3 =
    signature_version = s3

So anything that used boto directly without changes, this may be useful

Answer 4

In my case, the request type was wrong. I was using GET(dumb) It must be PUT.

Answer 5

For people using boto3 (Python SDK) use the below code

from botocore.client import Config


s3 = boto3.resource(
    's3',
    aws_access_key_id='xxxxxx',
    aws_secret_access_key='xxxxxx',
    config=Config(signature_version='s3v4')
)

Answer 6

I have been using Django, and I had to add these extra config variables to make this work. (in addition to settings mentioned in https://simpleisbetterthancomplex.com/tutorial/2017/08/01/how-to-setup-amazon-s3-in-a-django-project.html).

AWS_S3_REGION_NAME = "ap-south-1"

Or previous to boto3 version 1.4.4:

AWS_S3_REGION_NAME = "ap-south-1"

AWS_S3_SIGNATURE_VERSION = "s3v4"