AwsCredentialsManager.psm1
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<#
.SYNOPSIS A module for managing AWS CLI configuration and credentials .DESCRIPTION AwsCredentialsManager is a PowerShell module for managing AWS CLI configuration and credentials. It defines a naming convention for related profiles, makes it easy to add, find and switch between profiles, and greatly simplifies the process of refreshing temporary MFA credentials. For example, at work you might have an IAM user and then several roles (one per environment) which require MFA to use. AwsCredentialsManager makes it easy to set up and manage the following profiles: * work:iam to represent your IAM user, defined by your CLI access key/secret, * work:mfa to represent your temporary MFA credentials, which uses work:iam to obtain a session token, * work:dev to represent your role for the dev account, which uses work:mfa as the source profile, * etc. #> <# .SYNOPSIS Create a new IAM user profile .DESCRIPTION Create a new user profile that authenticates via an access key and secret .PARAMETER Domain The domain that the user belongs to, to help group related users, e.g. work .PARAMETER AccessKeyId The AWS Access Key ID .PARAMETER SecretAccessKey The AWS Secret Access Key .PARAMETER PathToCsv A path to a CSV file containing the "Access key ID" and "Secret access key" #> Function New-AwsIamUser { [CmdletBinding(SupportsShouldProcess, DefaultParameterSetName='KeySecret')] Param( [Parameter(Mandatory)] [string] $Domain, [Parameter(Mandatory, ParameterSetName='KeySecret')] [SecureString] $AccessKeyId, [Parameter(Mandatory, ParameterSetName='KeySecret')] [SecureString] $SecretAccessKey, [Parameter(Mandatory, ParameterSetName='CSV')] [string] $PathToCsv ) If ($PathToCsv) { $credentials = Import-Csv -Path $PathToCsv $AccessKeyIdPlainText = $credentials.'Access key ID' $SecretAccessKeyPlainText = $credentials.'Secret access key' } Else { $AccessKeyIdPlainText = SecureStringToPlainText $AccessKeyId $SecretAccessKeyPlainText = SecureStringToPlainText $SecretAccessKey } $profileName = "$Domain`:iam" If ($PSCmdlet.ShouldProcess( "aws configure set aws_access_key_id $(ConvertTo-MaskedString $AccessKeyIdPlainText) --profile $profileName", "[profile $profileName]", "Set aws_access_key_id to $(ConvertTo-MaskedString $AccessKeyIdPlainText)")) { aws configure set aws_access_key_id $AccessKeyIdPlainText --profile $profileName } If ($PSCmdlet.ShouldProcess( "aws configure set aws_secret_access_key $(ConvertTo-MaskedString $SecretAccessKeyPlainText) --profile $profileName", "[profile $profileName]", "Set aws_secret_access_key to $(ConvertTo-MaskedString $SecretAccessKeyPlainText)")) { aws configure set aws_secret_access_key $SecretAccessKeyPlainText --profile $profileName } } <# .SYNOPSIS Create a new MFA user profile .DESCRIPTION Create a new user profile that authenticates via MFA-enabled tempoary session tokens .PARAMETER Domain The domain that the user (and corresponding IAM user) belongs to, to help group related users, e.g. work .PARAMETER DeviceArn The ARN of the user's MFA device #> Function New-AwsMfaUser { [CmdletBinding(SupportsShouldProcess)] Param( [Parameter(Mandatory)] [ArgumentCompleter({ Get-AwsDomains $args[2] })] [string] $Domain, [Parameter(Mandatory)] [string] $DeviceArn ) $mfaProfileName = "$domain`:mfa" If ($PSCmdlet.ShouldProcess( "aws configure set mfa_device_arn $DeviceArn --profile $mfaProfileName", "[profile $mfaProfileName]", "Set mfa_device_arn to $DeviceArn")) { aws configure set mfa_device_arn $DeviceArn --profile $mfaProfileName } } <# .SYNOPSIS Create a new assume-role profile .DESCRIPTION Create a new user profile for assuming roles, which authenticates via a source profile of either an IAM or MFA user .PARAMETER RoleName A short name to describe the role .PARAMETER RoleArn The ARN of the role to assume .PARAMETER Region The default AWS region for the role .PARAMETER User The source profile to use for authentication. Tab-completion will list all available IAM and MFA users .PARAMETER Iam The source profile to use for authentication. Tab-completion will list all available IAM users .PARAMETER Mfa The source profile to use for authentication. Tab-completion will list all available MFA users #> Function New-AwsAssumeRole { [CmdletBinding(SupportsShouldProcess, DefaultParameterSetName='User')] Param( [Parameter(Mandatory)] [string] $RoleName, [Parameter(Mandatory)] [string] $RoleArn, [Parameter(Mandatory)] [string] $Region, [Parameter(Mandatory, ParameterSetName='User')] [ArgumentCompleter({ Get-AwsProfilesCompleter @args })] [string] $User, [Parameter(Mandatory, ParameterSetName='IamUser')] [ArgumentCompleter({ Get-AwsProfilesCompleter @args })] [string] $Iam, [Parameter(Mandatory, ParameterSetName='MfaUser')] [ArgumentCompleter({ Get-AwsProfilesCompleter @args })] [string] $Mfa ) $SourceProfile = If ($User) { $User } ` ElseIf ($IamUser) { $IamUser } ` Else { $Mfauser } $domain = Get-AwsDomain $SourceProfile $profileName = "$domain`:$RoleName" If ($PSCmdlet.ShouldProcess( "aws configure set role_arn $RoleArn --profile $profileName", "[profile $profileName]", "Set role_arn to $RoleArn")) { aws configure set role_arn $RoleArn --profile $profileName } If ($PSCmdlet.ShouldProcess( "aws configure set source_profile $SourceProfile --profile $profileName", "[profile $profileName]", "Set source_profile to $SourceProfile")) { aws configure set source_profile $SourceProfile --profile $profileName } If ($PSCmdlet.ShouldProcess( "aws configure set region $Region --profile $profileName", "[profile $profileName]", "Set region to $Region")) { aws configure set region $Region --profile $profileName } } <# .SYNOPSIS Set the active AWS profile .DESCRIPTION Set the active AWS profile by setting the AWS_PROFILE environment variable .PARAMETER Domain The domain that the user belongs to .PARAMETER All The profile within the given domain to use. Tab-completion will list all available IAM, MFA and assume-role profiles .PARAMETER AssumeRole The profile within the given domain to use. Tab-completion will list all available assume-role profiles .PARAMETER Iam The profile within the given domain to use. Tab-completion will list all available IAM profiles .PARAMETER Mfa The profile within the given domain to use. Tab-completion will list all available MFA profiles #> Function Set-AwsProfile { [CmdletBinding(SupportsShouldProcess, DefaultParameterSetName='All')] Param( [string] [ArgumentCompleter({ Get-AwsDomains @args })] $Domain, [Parameter(Mandatory, ParameterSetName='All')] [string] [ArgumentCompleter({ Get-AwsProfilesCompleter @args })] $All, [Parameter(Mandatory, ParameterSetName='AssumeRole')] [string] [ArgumentCompleter({ Get-AwsProfilesCompleter @args })] $AssumeRole, [Parameter(Mandatory, ParameterSetName='IamUser')] [ArgumentCompleter({ Get-AwsProfilesCompleter @args })] [string] $Iam, [Parameter(Mandatory, ParameterSetName='MfaUser')] [ArgumentCompleter({ Get-AwsProfilesCompleter @args })] [string] $Mfa ) $roleName = If ($All) { $All } ` ElseIf ($AssumeRole) { $AssumeRole} ` ElseIf ($Iam) { $Iam } ` Else { $Mfa } $profileName = If ($Domain) { "$Domain`:$roleName" } Else { $RoleName } If ($PSCmdlet.ShouldProcess( "`$env:AWS_PROFILE = '$profileName'", "`$env:AWS_PROFILE", "Set value to $profileName")) { $env:AWS_PROFILE = $profileName } } <# .SYNOPSIS Update an MFA-based temporary session token .DESCRIPTION Use an MFA code to update the temporary session token for the MFA profile associated with the currently active profile .PARAMETER Code The MFA code #> Function Update-AwsMfaCredentials { [CmdletBinding(SupportsShouldProcess)] Param( [SecureString] $Code, [Switch] $Force ) If (-not (Get-AwsProfile)) { Write-Error "No profile set. Please run Set-AwsProfile" Return } $domain = Get-AwsDomain (Get-AwsProfile) $iamProfileName = "$domain`:iam" $mfaProfileName = "$domain`:mfa" $expiration = [DateTime](aws configure get expiration --profile $mfaProfileName) If (-not $Force -and $expiration - [DateTime]::Now -gt [TimeSpan]::FromHours(1)) { Write-Host "Session already valid until $expiration" Return } If (-not $Code) { $Code = Read-Host -AsSecureString -Prompt "Code" } $codePlainText = SecureStringToPlainText $Code $deviceArn = aws configure get mfa_device_arn --profile $mfaProfileName If ($PSCmdlet.ShouldProcess( "aws sts get-session-token --serial-number $deviceArn --token-code $(ConvertTo-MaskedString $codePlainText) --duration-seconds 129600 --profile $iamProfileName", "[profile $iamProfileName]", "Get session token")) { $resp = aws sts get-session-token ` --serial-number $deviceArn ` --token-code $codePlainText ` --duration-seconds 129600 <# 36hrs #> ` --profile $iamProfileName If (-not $?) { Write-Error "Failed to acquire new session token" Return } } Else { Write-Error "Failed to acquire new session token" Return } $json = $resp | ConvertFrom-Json | Select-Object -Expand Credentials $accessKeyId = $json.AccessKeyId $secretAccessKey = $json.SecretAccessKey $sessionToken = $json.SessionToken $expiration = $json.Expiration.ToString("o") If ($PSCmdlet.ShouldProcess( "aws configure set aws_access_key_id $(ConvertTo-MaskedString $accessKeyId) --profile $mfaProfileName", "[profile $mfaProfileName]", "Set aws_access_key_id to $(ConvertTo-MaskedString $accessKeyId)")) { aws configure set aws_access_key_id $accessKeyId --profile $mfaProfileName } If ($PSCmdlet.ShouldProcess( "aws configure set aws_secret_access_key $(ConvertTo-MaskedString $accessKeyId) --profile $mfaProfileName", "[profile $mfaProfileName]", "Set aws_secret_access_key to $(ConvertTo-MaskedString $secretAccessKey)")) { aws configure set aws_secret_access_key $secretAccessKey --profile $mfaProfileName } If ($PSCmdlet.ShouldProcess( "aws configure set aws_secret_access_key $(ConvertTo-MaskedString $accessKeyId) --profile $mfaProfileName", "[profile $mfaProfileName]", "Set aws_secret_access_key to $(ConvertTo-MaskedString $secretAccessKey)")) { aws configure set aws_session_token $sessionToken --profile $mfaProfileName } If ($PSCmdlet.ShouldProcess( "aws configure set expiration $expiration --profile $mfaProfileName", "[profile $mfaProfileName]", "Set expiration to $expiration")) { aws configure set expiration $expiration --profile $mfaProfileName } } # Helpers Function Get-AwsDomain { Param( [Parameter(Mandatory)] [string] $ProfileName ) ($ProfileName -split ':',2)[0] } Function Get-AwsDomains { Param( [string] $Search ) aws configure list-profiles ` | ForEach-Object { Get-AwsDomain $_ } ` | Where-Object { $_ -like "$Search*" } ` | Sort-Object -Unique } Function Get-AwsRoleName { Param( [Parameter(Mandatory)] [string] $ProfileName ) ($ProfileName -split ':',2)[1] } Function Get-AwsProfile { $env:AWS_PROFILE } Function Get-AwsProfiles { [CmdletBinding()] Param( [ValidateSet('Iam', 'Mfa', 'User', 'AssumeRole', 'All')] [string] $Type = 'All', [ArgumentCompleter({ Get-AwsDomains $args[2] })] [string] $Domain ) $profiles = aws configure list-profiles $profiles = Switch ($Type) { 'Iam' { $profiles | Where-Object { $_ -like '*:iam' } } 'Mfa' { $profiles | Where-Object { $_ -like '*:mfa' } } 'User' { $profiles | Where-Object { $_ -like '*:iam' -or $_ -like '*:mfa' } } 'AssumeRole' { $profiles | Where-Object { -not ($_ -like '*:iam' -or $_ -like '*:mfa') } } 'All' { $profiles } } $profiles = Switch ($Domain) { '' { $profiles } Default { $profiles | Where-Object { $_ -like "$domain`:*" } } } $profiles } Function Get-AwsProfilesCompleter { Param( $_0, $Parameter, $Search, $_3, $FakeBoundParameters ) $domain = $FakeBoundParameters.Domain $profiles = Get-AwsProfiles -Type $Parameter -Domain $domain $Search = If ($domain) { "*:*$Search*" } Else { "*$Search*" } $profiles = $profiles | Where-Object { $_ -like $Search } If ($domain) { $profiles = $profiles | ForEach-Object { Get-AwsRoleName $_ } } $profiles } Function SecureStringToPlainText { Param( [Parameter(Mandatory)] [SecureString] $SecureString ) If ($Host.Version.Major -ge 7) { ConvertFrom-SecureString -AsPlainText $SecureString } Else { [System.Runtime.InteropServices.Marshal]::PtrToStringAuto( [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($SecureString) ) } } Function ConvertTo-MaskedString { Param( [Parameter(Mandatory)] [String] $String ) $String -Replace '.','*' } |