awsmfa (AWS MFA Refresher)

awsmfa replaces the config and credentials for MFA in AWS.

Usage

$ awsmfa [options] [token-code]

• The config file uses ~/.aws/config by default. You can override it with the environment variable AWS_CONFIG_FILE.
• The credentials file uses ~/.aws/credentials by default. You can override it with the environment variable AWS_SHARED_CREDENTIALS_FILE.

Options

--profile string
	The name of the profile from which the session can be obtained (default `default`)

--mfa-profile-name string
	MFA profile name (default `mfa`)

--duration-seconds int64
	Session expiration duration secounds (default `43200`)

--serial-number string
	AWS serial number. `--serial-number` is required

--quiet bool
	if enabled, log is not printed in the console. (default `false`)

Example

$ awsmfa --serial-number arn:aws:iam::123456789012:mfa/future-architect --profile my-profile 123456
2021/02/28 11:01:49 Wrote session token for profile mfa, expiration: 2021-02-28 14:01:49.689 +0000 UTC

initial

• .aws/config

Before	After
[default] region = us-east-1 output = json	[default] region = us-east-1 output = json [profile mfa]

• .aws/credentials

Before	After
[default] aws_access_key_id = ABCDEFGHIJKLMNOPQRST aws_secret_access_key = ChcdJbC9kraRNW5iy8XgDyR4QNRT44kKRPmKEGQT	[default] aws_access_key_id = ABCDEFGHIJKLMNOPQRST aws_secret_access_key = ChcdJbC9kraRNW5iy8XgDyR4QNRT44kKRPmKEGQT [mfa] aws_access_key_id = AKIAIOSFODNN7EXAMPLE aws_secret_access_key = wJalrXUtnFEMI/K7MDENG/bPxRfiCYzEXAMPLEKEY aws_session_token = AQoEXAMPLEH4aoA....

next time

Update aws_access_key_id, aws_secret_access_key and aws_session_token in the target section (default is mfa) of .aws/credentials.

Installation

• From binary

# Install the latest version. (Install it into ./bin/ by default).
$ curl -sfL https://raw.githubusercontent.com/future-architect/awsmfa/master/install.sh | sh -s

# Specify installation directory ($(go env GOPATH)/bin/) and version.
$ curl -sfL https://raw.githubusercontent.com/future-architect/awsmfa/master/install.sh | sh -s -- -b $(go env GOPATH)/bin [vX.Y.Z]

On Windows, you can run the above commands with Git Bash, which comes with Git for Windows.

• From source code

$ go install github.com/future-architect/awsmfa/cmd/awsmfa@latest