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Buffer size for credential forwarder is too small

See original GitHub issue

Actual Behavior

After the 1.4.1 release, I can no longer authenticate against more than one AWS ECR repo.

The first repo authenticated against, works fine, but authenticating into a subsequent ECR repo using the following command, produces the following error:

➜ aws ecr get-login-password --region us-east-1 --profile PROFILENAME | nerdctl --namespace k8s.io login --username AWS --password-stdin ACCOUNTID.dkr.ecr.us-east-1.amazonaws.com
time="2022-06-09T13:23:20Z" level=fatal msg="error saving credentials: error storing credentials - err: exit status 52, out: ``"

Steps to Reproduce

Authenticate against two distinct ECR repos like so:

➜ aws ecr get-login-password --region us-east-1 --profile PROFILENAME | nerdctl --namespace k8s.io login --username AWS --password-stdin ACCOUNTID.dkr.ecr.us-east-1.amazonaws.com

Result

```time=“2022-06-09T13:23:20Z” level=fatal msg=“error saving credentials: error storing credentials - err: exit status 52, out: ``”


### Expected Behavior

```Login Succeeded```

### Additional Information

_No response_

### Rancher Desktop Version

1.4.1

### Rancher Desktop K8s Version

1.19.6

### Which container runtime are you using?

containerd (nerdctl)

### What operating system are you using?

macOS

### Operating System / Build Version

12.3.1

### What CPU architecture are you using?

arm64 (Apple Silicon)

### Linux only: what package format did you use to install Rancher Desktop?

N/A

### Windows User Only

_No response_

Issue Analytics

State:
Created a year ago
Comments:8 (4 by maintainers)

Top GitHub Comments

1reaction

amanfredicommented, Jun 10, 2022

A workaround for this seems to be interacting directly with docker-credential-osxkeychain.

echo "{\"ServerURL\":\"306760545897.dkr.ecr.us-east-1.amazonaws.com\",\"Username\":\"AWS\",\"Secret\":\"$(aws ecr get-login-password --region us-east-1 --profile marketplace)\"}" | docker-credential-osxkeychain store

0reactions

janduboiscommented, Jun 10, 2022

I realized I can force docker-credential-rancher-desktop to exit with status 52 by passing any json over 2049 characters long

Thank you for digging into this! It is a bug in the credential forwarder: https://github.com/rancher-sandbox/rancher-desktop/blob/05872a8d37e0b5d53e5145fa391d9656e2e63dd9/src/main/credentialServer/httpCredentialHelperServer.ts#L27

I’m glad you found a workaround!

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