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AWS Cli authenticator via ADFS - small command-line tool to authenticate via ADFS and assume chosen role

Project description

aws-adfs

PyPI version Travis build

The project provides command line tool - aws-adfs to ease aws cli authentication against ADFS (multi factor authentication with active directory) and

aws-adfs command line tool

Thanks to Brandond contribution - "Remove storage of credentials, in favor of storing ADFS session cookies" aws-adfs:

allows you to re-login to STS without entering credentials for an extended period of time, without having to store the user's actual credentials. It also lets an organization control the period in which a user can re-login to STS without entering credentials, by altering the ADFS session lifetime.

Thanks to Brandond contribution - "Add support for legacy aws_security_token key in credentials file" aws-adfs supports ansible by providing two keys with security token:

  • AWS_SESSION_TOKEN and
  • AWS_SECURITY_TOKEN

Thanks to Brandond contribution - "Add support for Kerberos SSO on Windows via requests_negotiate_sspi"

  • on windows os will be used Security Support Provider Interface

Compatibility

As of version 0.2.0, this tool acts on the 'default' profile unless an alternate profile name has been specified on the command line or in your environment. Previous versions acted on the 'adfs' profile by default.

MFA integration

aws-adfs integrates with:

Installation

Examples of usage

aws-adfs

  • login to your adfs host with disabled ssl verification on aws cli profile: adfs

    aws-adfs login --adfs-host=your-adfs-hostname --no-ssl-verification
    

    and verification

    aws --profile=adfs s3 ls
    
  • login to your adfs host with disabled ssl verification on specified aws cli profile: specified-profile

    aws-adfs login --profile=specified-profile --adfs-host=your-adfs-hostname --no-ssl-verification
    

    and verification

    aws --profile=specified-profile s3 ls
    
  • login to your adfs host within ansible playbook

    ---
    - name: "Auth sts aws"
      command: "aws-adfs login --adfs-host sts.example.com --env --stdout --role-arn arn:aws:iam::000123456789:role/ADMIN"
      register: sts_result
      environment:
        - username: "{{ ansible_user }}@example.com"
        - password: "{{ ansible_ssh_pass }}"
    
    - name: "Set sts facts"
      set_fact:
        sts: "{{ sts_result.stdout | from_json }}"
    
    - name: "List s3 Buckets"
      aws_s3_bucket_facts:
        aws_access_key: "{{ sts.AccessKeyId }}"
        aws_secret_key: "{{ sts.SecretAccessKey }}"
        security_token: "{{ sts.SessionToken }}"
        region: "us-east-1"
      register: buckets
    
    - name: "Print Buckets"
      debug:
        var: buckets
    
  • login to your adfs host by passing username and password credentials via a file

    aws-adfs login --adfs-host=your-adfs-hostname --authfile=/path/and/file/name
    

    Auth file should be in format of

    [profile_name]
    username = your_username
    password = your_password
    
  • help, help, help?

    $ aws-adfs --help
    Usage: aws-adfs [OPTIONS] COMMAND [ARGS]...
    
    Options:
      --version  Show current tool version
      --help  Show this message and exit.
    
    Commands:
      list   lists available profiles
      login  Authenticates an user with active directory...
      reset  removes stored profile
    
    $ aws-adfs list --help
    Usage: aws-adfs list [OPTIONS]
    
      lists available profiles
    
    Options:
      --version  Show current tool version
      --help  Show this message and exit.
    
    $ aws-adfs login --help
    Usage: aws-adfs login [OPTIONS]
    
      Authenticates an user with active directory credentials
    
    Options:
      --profile TEXT                  AWS cli profile that will be authenticated.
                                      After successful authentication just use:
                                      aws --profile <authenticated profile>
                                      <service> ...
      --region TEXT                   The default AWS region that this script will
                                      connect
                                      to for all API calls
      --ssl-verification / --no-ssl-verification
                                      SSL certificate verification: Whether or not
                                      strict certificate
                                      verification is done,
                                      False should only be used for dev/test
      --adfs-ca-bundle TEXT           Override CA bundle for SSL certificate
                                      verification for ADFS server only.
      --adfs-host TEXT                For the first time for a profile it has to
                                      be provided, next time for the same profile
                                      it will be loaded from the stored
                                      configuration
      --output-format [json|text|table]
                                      Output format used by aws cli
      --provider-id TEXT              Provider ID, e.g urn:amazon:webservices
                                      (optional)
      --s3-signature-version [s3v4]   s3 signature version: Identifies the version
                                      of AWS Signature to support for
                                      authenticated requests. Valid values: s3v4
      --env                           Read username, password from environment
                                      variables (username and password).
      --stdin                         Read username, password from standard input
                                      separated by a newline.
      --authfile TEXT                 Read username, password from a local file
                                      (optional)
      --stdout                        Print aws_session_token in json on stdout.
      --printenv                      Output commands to set AWS_ACCESS_KEY_ID,
                                      AWS_SECRET_ACCESS_KEY, AWS_SESSION_TOKEN,
                                      AWS_DEFAULT_REGION environmental variables
                                      instead of saving them to the aws
                                      configuration file.
      --role-arn TEXT                 Predefined role arn to selects, e.g. aws-
                                      adfs login --role-arn arn:aws:iam::123456789
                                      012:role/YourSpecialRole
      --session-duration INTEGER      Define the amount of seconds you want to
                                      establish your STS session, e.g. aws-adfs
                                      login --session-duration 3600
      --assertfile TEXT               Use SAML assertion response from a local
                                      file
      --sspi / --no-sspi              Whether or not to use Kerberos SSO
                                      authentication via SSPI (Windows only,
                                      defaults to True).
      --u2f-trigger-default / --no-u2f-trigger-default
                                      Whether or not to also trigger the default
                                      authentication method when U2F is available
                                      (only works with Duo for now).
      --help                          Show this message and exit.
    
    $ aws-adfs reset --help                                                                                                                                              13:39
    Usage: aws-adfs reset [OPTIONS]
    
      removes stored profile
    
    Options:
      --profile TEXT  AWS cli profile that will be removed
      --help          Show this message and exit.
    

Known issues

  • duo-security

    Error: Cannot begin authentication process. The error response: {"message": "Unknown authentication method.", "stat": "FAIL"}

    Please setup preferred auth method in duo-security settings (settings' -> 'My Settings & Devices').

  • USB FIDO U2F does not work in Windows Subsystem for Linux (WSL)

    OSError: [Errno 2] No such file or directory: '/sys/class/hidraw'

    USB devices are not accessible in WSL, please install and run aws-adfs on the Windows 10 host and then access the credentials in WSL from the filesystem. Example:

    export AWS_CONFIG_FILE=/mnt/c/Users/username/.aws/config
    export AWS_SHARED_CREDENTIALS_FILE=/mnt/c/Users/username/.aws/credentials
    
  • FIDO U2F devices are not detected on Windows 10 build 1903 or newer

    Running aws-adfs as Administrator is required since Windows 10 build 1903 to access FIDO U2F devices, cf. https://github.com/Yubico/python-fido2/issues/55)

  • in cases of trouble with lxml please install

    sudo apt-get install python-dev libxml2-dev libxslt1-dev zlib1g-dev
    
  • in cases of trouble with pykerberos please install

    sudo apt-get install python-dev libkrb5-dev
    
  • in cases of trouble with OSX Sierra (obsolete OpenSSL), upgrade OpenSSL. Example:

    brew upgrade openssl
    

    AND add explicit directive to .bash_profile:

    export PATH=$(brew --prefix openssl)/bin:$PATH
    
  • python 2.6 is not supported

  • python 3.2 is not supported

  • python 3.3 is not supported

Credits

  • Brandond for: Remove storage of credentials, in favor of storing ADFS session cookies
  • Brandond for: Add support for legacy aws_security_token key in credentials file
  • Brandond for: Store last username in profile config; use it as default for prompt
  • Brandond for: python 3 compatibility
  • Brandond for: Add support for Kerberos SSO on Windows via requests_negotiate_sspi
  • Brandond for: ssl_verification must be a str
  • Brandond for: Move pytest-runner out of setup-requires
  • Brandond for: Improve handling of role selection
  • Brandond for: Improve handling of errors caused by excessive cookie growth
  • Brandond for: Default to 'default' profile, in line with other AWS tools
  • kwhitlock for: Added extra option "--provider-id"
  • SydOps for: add additional information in list command's output
  • eric-nord for: bringing topic of duo security MFA integration
  • roblugton for: Fix formatting in README.md
  • cliv for: pointing out the issue with missing preferred device for duo-security and providing workaround
  • AndrewFarley for: Bug in parsing Duo host and signature, backwards compatible
  • eikenb for: Version 0.3.4 returns no roles - thanks for vigilance of eikenb spoiled egg was identified
  • eikenb for: add login argument to accept username/password from stdin
  • irgeek for: Add Symantec VIP Access support
  • Brandond for: Fix Negotiate auth on non-domain-joined Windows hosts
  • giafar for: Role arn as parameter
  • zanettibo for: Add support for Ansible Tower/AWX workflow authentication
  • anthoneous and KyleJamesWalker for: add session duration flag
  • KyleJamesWalker for: Allow phone call authentication
  • KyleJamesWalker for: Change default profile to default
  • kwhitlock for: Feature/read username and password from file
  • avoidik for: Workaround of Symantec VIP obfuscated form
  • leonardo-test for fix: The --env flag is not being called and therefore using the env parameter will not work.
  • NotMrSteve for: Add RSA SecurID MFA
  • JLambeth for: Added flag for disabling Kerberos SSO authentication via SSPI
  • bghinkle for: Fix Duo API change - follow result_url and return cookie from result
  • jan-molak for: Corrected the XPath expression to work with the latest version of AWS…
  • NotMrSteve for: Save duo session cookies
  • pdecat for: Fallback on prompt if env, stdin or auth file do not provide both username and password
  • 0x91 for: Support for Azure MFA Server
  • pdecat for: Fix Duo authentication initiation failure messages
  • tommywo for: save provider_id config
  • budzejko for: Add support for adfs-ca-bundle option
  • rinrinne for: Respect AWS_DEFAULT_PROFILE if defined
  • mjernsell for: Add support for AzureMfaAuthentication
  • kfattig for: Handle sspi like other config options
  • pdecat for:
    • lxml 4.4.0 dropped support for python 3.4
    • Add Duo U2F support
    • Use MozillaCookieJar as LWPCookieJar has an issue on Windows when cookies have an 'expires' date too far in the future and they are converted from timestamp to datetime
    • Fix python 2.7 compatibility
    • Document Windows 10 and WSL usage/issues
    • Run tests with python 3.6, 3.7 and 3.8-dev
    • Add options to trigger or not the default authentication method when U2F is available
    • Fix AttributeError: 'generator' object has no attribute 'append' on python3
    • Do not print stack trace if no U2F device is available
    • Pin fido2 dependency to < 0.8.0 as it is a breaking release
    • U2F: fido2 v0.8.1 compatibility (U2FClient.sign timeout renamed to event)
  • bodgit for: Kerberos support
  • pdecat for:
    • Duo: support U2F with no preferred factor or device configured
    • Document new libkrb5-dev system dependency for pykerberos
    • Drop boto3 dependency
    • Default SSPI to True on Windows only, False otherwise

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