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working govcloud authentication #1

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19 changes: 18 additions & 1 deletion AWS/CVAWSCloudSizingScript.ps1
100644 → 100755
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Original file line number Diff line number Diff line change
Expand Up @@ -2444,14 +2444,20 @@ function Invoke-AuthenticationScenarios {
return
}

$roleArn = "arn:aws:iam::${AccountId}:role/${roleName}"
$partitionString = if ($script:Config.Partition -eq 'GovCloud') { 'aws-us-gov' } else { 'aws' }
$roleArn = "arn:${partitionString}:iam::${AccountId}:role/${roleName}"
Write-ScriptOutput "DEBUG: Built role ARN: $roleArn" -Level Info

$sessionName = if ($CrossAccountRoleSessionName) { $CrossAccountRoleSessionName } else { "CVAWS-Cost-Sizing" }

$stsRegion = if ($script:Config.Partition -eq 'GovCloud') { $script:Config.DefaultGovCloudQueryRegion } else { $script:Config.DefaultQueryRegion }
Write-ScriptOutput "Using STS endpoint region $stsRegion for AssumeRole" -Level Info

$stsParams = @{
RoleArn = $roleArn
RoleSessionName = $sessionName
ErrorAction = 'Stop'
Region = $stsRegion
}
if ($ExternalId) { $stsParams.ExternalId = $ExternalId }

Expand Down Expand Up @@ -2963,6 +2969,17 @@ try {
exit 1
}

if ($script:Config.Partition -eq 'GovCloud') {
$govRegion = $script:Config.DefaultGovCloudQueryRegion
$govStsEndpoint = "sts.$govRegion.amazonaws.com"
try {
Set-AWSDefaultConfiguration -Region $govRegion -StsEndpoint $govStsEndpoint
Write-ScriptOutput "Set default AWS configuration for GovCloud partition (Region: $govRegion, STS Endpoint: $govStsEndpoint)." -Level Info
} catch {
Write-ScriptOutput "Failed to set default AWS configuration for GovCloud. This may fail if the AWS.Tools.Common module is not fully loaded. Error: $_" -Level Warning
}
}

if ($ProfileLocation) {
Write-ScriptOutput "ProfileLocation parameter provided: $ProfileLocation" -Level Info
if (Test-Path $ProfileLocation) {
Expand Down
4 changes: 4 additions & 0 deletions AWS/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,7 @@ Common script parameters
- -ProfileLocation "<path>" — shared Credentials file path.
- -CrossAccountRoleName "<RoleName>" — role to assume in target accounts.
- -Regions "us-east-1,us-west-2" — comma-separated regions to query.
- -Partition "GovCloud" — Specifies the AWS partition. Use "GovCloud" for AWS GovCloud regions.


Credential Files:
Expand Down Expand Up @@ -124,6 +125,9 @@ Example invocations

# Cross-account role using file with account IDs [CloudShell]
./CVAWSCloudSizingScript.ps1 -CrossAccountRoleName "InventoryRole" -UserSpecifiedAccounts "123456789012" -Regions "us-east-1"

# Cross-account role in AWS GovCloud
./CVAWSCloudSizingScript.ps1 -CrossAccountRoleName "InventoryRole" -UserSpecifiedAccounts "123456789012" -Regions "us-gov-west-1" -Partition "GovCloud"
```


Expand Down