Can't access AWS CodeCommit with SSH

Question

Having an incredibly difficult time figuring out how to get AWS CodeCommit to work with standard SSH authentication. Seen another topic like this but no answer and I'm not allowed to comment yet. This is on Windows using Git Bash.

Repro Steps

1. Created IAM user with full permissions (AwsAdministrator)
2. From Git Bash in ~/.ssh
3. "cat id_rsa.pub" and copy output to clipboard
4. In IAM console, click button to add SSH key and paste into the input field. Click Save.
5. Attempt to access a CodeCommit repo (in this case trying to push) and get "Permission denied".

Git + SSH output

This is what I get from SSH with DEBUG3 logging:

debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /c/Users/Dan/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-rsa blen 535
debug2: input_userauth_pk_ok: fp SHA256:<omitted>
debug3: sign_and_send_pubkey: RSA SHA256:<same-as-above>
debug1: Authentications that can continue: publickey
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey).
fatal: Could not read from remote repository.

For comparison this is what I get using the exact same SSH keys to GitHub:

debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /c/Users/Dan/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-rsa blen 535
debug2: input_userauth_pk_ok: fp SHA256:<same-as-above>
debug3: sign_and_send_pubkey: RSA SHA256:<same-as-above>
debug1: Authentication succeeded (publickey).
Authenticated to github.com ([192.30.252.130]:22).

The above output was from running a normal git command such as git push origin master with ssh debug logging enabled in .ssh/config:

Host git-codecommit.us-east-1.amazonaws.com
  LogLevel DEBUG3

Host github.com
  LogLevel DEBUG3

Answer 1

It looks like you missed a step in setting up SSH. You need to add this information to your .ssh/config file:

Host git-codecommit.us-east-1.amazonaws.com
   User Your-SSH-Key-ID, such as APKAEIBAERJR2EXAMPLE
   IdentityFile Your-Private-Key-File, such as ~/.ssh/codecommit_rsa or ~/.ssh/id_rsa

You can get Your-SSH-Key-ID from the IAM console.

Answer 2

My case was a bit different.

The "Security credentials" tab has both "Access keys" and "SSH keys for AWS CodeCommit". Make sure you're using the CodeCommit key id.

Answer 3

Make sure the config file is not saved as txt file and use SSH Key ID, not Access

Answer 4

This worked

Host git-codecommit.us-west-2.amazonaws.com
    User SSHKEYID
    IdentityFile ~/.ssh/id_rsa

Answer 5

Please follow the following documentation from the AWS

Linux

https://docs.aws.amazon.com/codecommit/latest/userguide/setting-up-ssh-unixes.html

Windows

https://docs.aws.amazon.com/codecommit/latest/userguide/setting-up-ssh-windows.html

I have tested setting up SSH connection for windows only, please test the SSH connection for Linux by following the above mentioned link;

Following are the steps for setting up the SSH connection for codecommit on Windows 10.

Step 1

Initial configuration for CodeCommit(Please refer documentation link)

Step 2

Install Git(Please refer documentation link)

step 3

Generate ssh key by running following command:

ssh-keygen -t rsa -b 4096 -C "[email protected]"

after running this command it should generate public key(.pub) and private key in C:\Users{user name here}.ssh directory

Step 4

Login into the aws management console and go to IAM-->Users --> Select Target User --> Security credentials Tab -->SSH keys for AWS CodeCommit and click upload ssh key. Copy paste the contents of the public key e.g C:\Users{user name here}.ssh\id_rsa.pub and save changes.But You can choose different name for your publc key(id_rsa.pub) while using the command ssh-keygen -t rsa -b 4096 -C "[email protected]".

step 5:

after uploading the public key ,copy the SSH key ID .

Step 6

create C:\Users{user name here}.ssh\config file (with no file extenstion,in windows save it as config and select all file types option. Config.txt most probbly will not work). paste the following contents in the C:\Users{user name here}.ssh\config file:

Host git-codecommit.*.amazonaws.com
  User {copy SSH key ID here}
  IdentityFile ~/.ssh/{copy name of the public key here }
  
Host git-codecommit.*.amazonaws.com
  User THISISEXMAPLE123
  IdentityFile ~/.ssh/id_rsa
  

Step 7

  git clone ssh://[email protected]/v1/repos/MyDemoRepo my-demo-repo

Answer 6

Try to use sshkey-ID when making git clone

So git clone should look like this:

git clone ssh://<SSHKEY-ID>@git-codecommit.<REGION>.amazonaws.com/v1/repos/<REPO-NAME>