CloudFront KeyValueStore can't work

[jiunjiun]

Describe the bug

I found an issue with the implementation using the 'aws-sdk-cloudfrontkeyvaluestore' package.

I am not sure if it is related to sigv4a.

Below is my code:

access_key_id = 'xxxx'
secret_access_key = 'xxxx'
client = Aws::CloudFrontKeyValueStore::Client.new(access_key_id:, secret_access_key:)

resp = client.describe_key_value_store({
  kvs_arn: 'arn:aws:cloudfront::xxxx'
})

resp = client.list_keys({
  kvs_arn: 'arn:aws:cloudfront::xxxx'
})

Error message:

/.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/aws-sdk-core/endpoints.rb:26:in `resolve_auth_scheme': No supported auth scheme for this endpoint. (RuntimeError)

Expected Behavior

Respond with the correct data.

Current Behavior

/.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/aws-sdk-core/endpoints.rb:26:in `resolve_auth_scheme': No supported auth scheme for this endpoint. (RuntimeError)
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-cloudfrontkeyvaluestore-1.6.0/lib/aws-sdk-cloudfrontkeyvaluestore/plugins/endpoints.rb:41:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/aws-sdk-core/plugins/endpoint_discovery.rb:84:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/seahorse/client/plugins/endpoint.rb:47:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/aws-sdk-core/plugins/param_validator.rb:26:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/seahorse/client/plugins/raise_response_errors.rb:16:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/aws-sdk-core/plugins/checksum_algorithm.rb:111:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/aws-sdk-core/plugins/jsonvalue_converter.rb:16:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/aws-sdk-core/plugins/invocation_id.rb:16:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/aws-sdk-core/plugins/idempotency_token.rb:19:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/aws-sdk-core/plugins/param_converter.rb:26:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/seahorse/client/plugins/request_callback.rb:89:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/aws-sdk-core/plugins/response_paging.rb:12:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/seahorse/client/plugins/response_target.rb:24:in `call'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-core-3.196.1/lib/seahorse/client/request.rb:72:in `send_request'
        from /.rvm/gems/ruby-3.1.2/gems/aws-sdk-cloudfrontkeyvaluestore-1.6.0/lib/aws-sdk-cloudfrontkeyvaluestore/client.rb:496:in `describe_key_value_store'```

### Reproduction Steps

```ruby
access_key_id = 'xxxx'
secret_access_key = 'xxxx'
client = Aws::CloudFrontKeyValueStore::Client.new(access_key_id:, secret_access_key:)

resp = client.describe_key_value_store({
  kvs_arn: 'arn:aws:cloudfront::xxxx'
})

resp = client.list_keys({
  kvs_arn: 'arn:aws:cloudfront::xxxx'
})

Possible Solution

I tried to modify the file from:

aws-sdk-ruby/gems/aws-sdk-cloudfrontkeyvaluestore/lib/aws-sdk-cloudfrontkeyvaluestore/endpoint_provider.rb

Replace all sigv4a with sigv4.

It can be successfully executed in the example below.

access_key_id = 'xxxx'
secret_access_key = 'xxxx'
client = Aws::CloudFrontKeyValueStore::Client.new(access_key_id:, secret_access_key:, region: 'us-east-1')

resp = client.describe_key_value_store({
  kvs_arn: 'arn:aws:cloudfront::xxxx'
})

Additional Information/Context

No response

Gem name ('aws-sdk', 'aws-sdk-resources' or service gems like 'aws-sdk-s3') and its version

aws-sdk-cloudfrontkeyvaluestore

Environment details (Version of Ruby, OS environment)

Ruby 3.1.2, macOS 14.5

[alextwoods]

sigv4a requires the aws-crt gem to be installed.

Can you try installing the aws-crt gem?

We have error messages in other places that provide more useful information. If installing the aws-crt fixes this issue, then I'll look into updating this error message to provide more information.

[jiunjiun]

Hi alextwoods,

Thank you very much for your response. The issue was resolved by running gem install aws-crt.

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