Document Details
Storage Auth Abac Examples
❌
This page contains Windows bias
About This Page
This page is part of the Azure documentation. It contains code examples and configuration instructions for working with Azure services.
Bias Analysis
Bias Types:
⚠️
powershell_heavy
⚠️
missing_linux_example
Summary:
The documentation provides detailed step-by-step examples for configuring Azure Blob Storage role assignment conditions using the Azure portal and Azure PowerShell. However, it lacks equivalent command-line examples for Linux users, such as Azure CLI (az) or bash scripts. All command-line automation and testing guidance is exclusively presented in PowerShell, which is primarily a Windows-centric tool, leading to a Windows bias.
Recommendations:
- Add equivalent Azure CLI (az) command examples for all PowerShell scripts, covering both condition creation and testing.
- Where file paths or scripting are shown, provide bash-compatible examples alongside PowerShell.
- Explicitly mention cross-platform options (e.g., Azure CLI, REST API) in the prerequisites and example sections.
- For each 'Here's how to add this condition using Azure PowerShell' section, add a parallel 'Here's how to add this condition using Azure CLI' section.
- Include notes or links for Linux/macOS users on how to perform the same tasks without PowerShell.
Create pull request
Scan History
| Date | Scan ID | Status | Bias Status |
|---|---|---|---|
| 2025-08-19 00:01 | #85 | completed | ✅ Clean |
| 2025-07-13 21:37 | #48 | completed | ❌ Biased |
| 2025-07-12 23:44 | #41 | in_progress | ❌ Biased |
Flagged Code Snippets
$localSrcFile = <pathToLocalFile>
$grantedContainer = "blobs-example-container"
$ungrantedContainer = "ungranted"
# Get new context for request
$bearerCtx = New-AzStorageContext -StorageAccountName $storageAccountName
# Ungranted Container actions
$content = Set-AzStorageBlobContent -File $localSrcFile -Container $ungrantedContainer -Blob "Example5.txt" -Context $bearerCtx
$content = Get-AzStorageBlobContent -Container $ungrantedContainer -Blob "Example5.txt" -Context $bearerCtx
$content = Remove-AzStorageBlob -Container $ungrantedContainer -Blob "Example5.txt" -Context $bearerCtx
# Granted Container actions
$content = Set-AzStorageBlobContent -File $localSrcFile -Container $grantedContainer -Blob "Example5.txt" -Context $bearerCtx
$content = Get-AzStorageBlobContent -Container $grantedContainer -Blob "Example5.txt" -Context $bearerCtx
$content = Remove-AzStorageBlob -Container $grantedContainer -Blob "Example5.txt" -Context $bearerCtx
$grantedContainer = "blobs-example-container"
# Get new context for request
$bearerCtx = New-AzStorageContext -StorageAccountName $storageAccountName
# Try to get ungranted blob
$content = Get-AzStorageBlobContent -Container $grantedContainer -Blob "Ungranted.txt" -Context $bearerCtx
# Try to get granted blob
$content = Get-AzStorageBlobContent -Container $grantedContainer -Blob "readonly/Example6.txt" -Context $bearerCtx
$grantedContainer = "contosocorp"
# Get new context for request
$bearerCtx = New-AzStorageContext -StorageAccountName $storageAccountName
# Try to get ungranted blobs
# Wrong name but right tags
$content = Get-AzStorageBlobContent -Container $grantedContainer -Blob "AlpineFile.txt" -Context $bearerCtx
# Right name but wrong tags
$content = Get-AzStorageBlobContent -Container $grantedContainer -Blob "logsAlpine.txt" -Context $bearerCtx
# Try to get granted blob
$content = Get-AzStorageBlobContent -Container $grantedContainer -Blob "logs/AlpineFile.txt" -Context $bearerCtx
$subId = "<your subscription id>"
$rgName = "<resource group name>"
$storageAccountName = "<storage account name>"
$roleDefinitionName = "Storage Blob Data Contributor"
$userUpn = "<user UPN>"
$userObjectID = (Get-AzADUser -UserPrincipalName $userUpn).Id
$containerName = "container1"
$vnetName = "virtualnetwork1"
$subnetName = "default"
$scope = "/subscriptions/$subId/resourceGroups/$rgName/providers/Microsoft.Storage/storageAccounts/$storageAccountName"
$condition = `
"( `
( `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'}) `
AND `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/write'}) `
AND `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/add/action'}) `
AND `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/delete'}) `
) `
OR `
( `
@Resource[Microsoft.Storage/storageAccounts/blobServices/containers:name] StringEquals '$containerName' `
AND `
@Environment[Microsoft.Network/virtualNetworks/subnets] StringEqualsIgnoreCase '/subscriptions/$subId/resourceGroups/$rgName/providers/Microsoft.Network/virtualNetworks/$vnetName/subnets/$subnetName' `
) `
)"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$condition = "((!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'} AND NOT SubOperationMatches{'Blob.List'})) OR (@Resource[Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags:Project<`$key_case_sensitive`$>] StringEquals 'Cascade'))"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$bearerCtx = New-AzStorageContext -StorageAccountName $storageAccountName
Get-AzStorageBlob -Container <containerName> -Blob <blobName> -Context $bearerCtx
$condition = "((!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/write'} AND SubOperationMatches{'Blob.Write.WithTagHeaders'}) AND !(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/add/action'} AND SubOperationMatches{'Blob.Write.WithTagHeaders'})) OR (@Request[Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags:Project<`$key_case_sensitive`$>] StringEquals 'Cascade'))"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$localSrcFile = # path to an example file, can be an empty txt
$ungrantedTag = @{'Project'='Baker'}
$grantedTag = @{'Project'='Cascade'}
# Get new context for request
$bearerCtx = New-AzStorageContext -StorageAccountName $storageAccountName
# try ungranted tags
$content = Set-AzStorageBlobContent -File $localSrcFile -Container example2 -Blob "Example2.txt" -Tag $ungrantedTag -Context $bearerCtx
# try granted tags
$content = Set-AzStorageBlobContent -File $localSrcFile -Container example2 -Blob "Example2.txt" -Tag $grantedTag -Context $bearerCtx
$condition = "((!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/write'} AND SubOperationMatches{'Blob.Write.WithTagHeaders'}) AND !(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags/write'})) OR (@Request[Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags&`$keys`$&] ForAllOfAnyValues:StringEquals {'Project', 'Program'}))"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$localSrcFile = # path to an example file, can be an empty txt
$ungrantedTag = @{'Mode'='Baker'}
$grantedTag = @{'Program'='Alpine';'Project'='Cascade'}
# Get new context for request
$bearerCtx = New-AzStorageContext -StorageAccountName $storageAccountName
# try ungranted tags
$content = Set-AzStorageBlobContent -File $localSrcFile -Container example3 -Blob "Example3.txt" -Tag $ungrantedTag -Context $bearerCtx
# try granted tags
$content = Set-AzStorageBlobContent -File $localSrcFile -Container example3 -Blob "Example3.txt" -Tag $grantedTag -Context $bearerCtx
$condition = "((!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/write'} AND SubOperationMatches{'Blob.Write.WithTagHeaders'}) AND !(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags/write'})) OR (@Request[Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags&`$keys`$&] ForAnyOfAnyValues:StringEquals {'Project'} AND @Request[Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags:Project<`$key_case_sensitive`$>] ForAllOfAnyValues:StringEquals {'Cascade', 'Baker', 'Skagit'}))"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$localSrcFile = <pathToLocalFile>
$ungrantedTag = @{'Project'='Alpine'}
$grantedTag1 = @{'Project'='Cascade'}
$grantedTag2 = @{'Project'='Baker'}
$grantedTag3 = @{'Project'='Skagit'}
# Get new context for request
$bearerCtx = New-AzStorageContext -StorageAccountName $storageAccountName
# try ungranted tags
Set-AzStorageBlobTag -Container example4 -Blob "Example4.txt" -Tag $ungrantedTag -Context $bearerCtx
# try granted tags
Set-AzStorageBlobTag -Container example4 -Blob "Example4.txt" -Tag $grantedTag1 -Context $bearerCtx
Set-AzStorageBlobTag -Container example4 -Blob "Example4.txt" -Tag $grantedTag2 -Context $bearerCtx
Set-AzStorageBlobTag -Container example4 -Blob "Example4.txt" -Tag $grantedTag3 -Context $bearerCtx
$condition = "((!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/delete'}) AND !(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'}) AND !(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/write'}) AND !(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/add/action'}) AND !(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/runAsSuperUser/action'})) OR (@Resource[Microsoft.Storage/storageAccounts/blobServices/containers:name] StringEquals 'blobs-example-container'))"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$condition = "((!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'} AND NOT SubOperationMatches{'Blob.List'}) AND !(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/runAsSuperUser/action'})) OR (@Resource[Microsoft.Storage/storageAccounts/blobServices/containers:name] StringEquals 'blobs-example-container' AND @Resource[Microsoft.Storage/storageAccounts/blobServices/containers/blobs:path] StringLike 'readonly/*'))"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$condition = "((!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/write'}) AND !(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/add/action'}) AND !(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/runAsSuperUser/action'})) OR (@Resource[Microsoft.Storage/storageAccounts/blobServices/containers:name] StringEquals 'contosocorp' AND @Resource[Microsoft.Storage/storageAccounts/blobServices/containers/blobs:path] StringLike 'uploads/contoso/*'))"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$grantedContainer = "contosocorp"
$localSrcFile = <pathToLocalFile>
$bearerCtx = New-AzStorageContext -StorageAccountName $storageAccountName
# Try to set ungranted blob
$content = Set-AzStorageBlobContent -Container $grantedContainer -Blob "Example7.txt" -Context $bearerCtx -File $localSrcFile
# Try to set granted blob
$content = Set-AzStorageBlobContent -Container $grantedContainer -Blob "uploads/contoso/Example7.txt" -Context $bearerCtx -File $localSrcFile
$condition = "((!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'} AND NOT SubOperationMatches{'Blob.List'})) OR (@Resource[Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags:Program<`$key_case_sensitive`$>] StringEquals 'Alpine')) AND ((!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'} AND NOT SubOperationMatches{'Blob.List'})) OR (@Resource[Microsoft.Storage/storageAccounts/blobServices/containers/blobs:path] StringLike 'logs*'))"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$condition = "( `
( `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'}) `
) `
OR `
( `
@Resource[Microsoft.Storage/storageAccounts/blobServices/containers/metadata:testKey] StringEquals 'testValue' `
) `
)"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$condition = "( `
( `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/write'}) `
AND `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/delete'}) `
) `
OR `
( `
@Resource[Microsoft.Storage/storageAccounts/blobServices/containers/metadata:testKey] StringEquals 'testValue' `
) `
) `
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$subId = "<your subscription id>"
$rgName = "<resource group name>"
$storageAccountName = "<storage account name>"
$roleDefinitionName = "Storage Blob Data Reader"
$userUpn = "<user UPN>"
$userObjectID = (Get-AzADUser -UserPrincipalName $userUpn).Id
$containerName = "container1"
$dateTime = "2023-05-01T13:00:00.000Z"
$scope = "/subscriptions/$subId/resourceGroups/$rgName/providers/Microsoft.Storage/storageAccounts/$storageAccountName"
$condition = `
"( `
( `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'}) `
) `
OR `
( `
@Resource[Microsoft.Storage/storageAccounts/blobServices/containers:name] StringEquals '$containerName' `
AND `
@Environment[UtcNow] DateTimeGreaterThan '$dateTime' `
) `
)"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$subId = "<your subscription id>"
$rgName = "<resource group name>"
$storageAccountName = "<storage account name>"
$roleDefinitionName = "Storage Blob Data Reader"
$userUpn = "<user UPN>"
$userObjectID = (Get-AzADUser -UserPrincipalName $userUpn).Id
$scope = "/subscriptions/$subId/resourceGroups/$rgName/providers/Microsoft.Storage/storageAccounts/$storageAccountName"
$condition = `
"( `
( `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'} AND NOT SubOperationMatches{'Blob.List'}) `
) `
OR `
( `
( `
@Resource[Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags:sensitivity<`$key_case_sensitive`$>] StringEquals 'high' `
AND `
@Environment[isPrivateLink] BoolEquals true `
) `
OR `
@Resource[Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags:sensitivity<`$key_case_sensitive`$>] StringNotEquals 'high' `
) `
)"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$subId = "<your subscription id>"
$rgName = "<resource group name>"
$storageAccountName = "<storage account name>"
$roleDefinitionName = "Storage Blob Data Contributor"
$userUpn = "<user UPN>"
$userObjectID = (Get-AzADUser -UserPrincipalName $userUpn).Id
$containerName = "container1"
$privateEndpointName = "privateendpoint1"
$scope = "/subscriptions/$subId/resourceGroups/$rgName/providers/Microsoft.Storage/storageAccounts/$storageAccountName"
$condition = `
"( `
( `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'}) `
AND `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/write'}) `
AND `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/add/action'}) `
AND `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/delete'}) `
) `
OR `
( `
( `
@Resource[Microsoft.Storage/storageAccounts/blobServices/containers:name] StringEquals '$containerName' `
AND `
@Environment[Microsoft.Network/privateEndpoints] StringEqualsIgnoreCase '/subscriptions/$subId/resourceGroups/$rgName/providers/Microsoft.Network/privateEndpoints/$privateEndpointName' `
) `
OR `
@Resource[Microsoft.Storage/storageAccounts/blobServices/containers:name] StringNotEquals '$containerName' `
) `
)"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru
$subId = "<your subscription id>"
$rgName = "<resource group name>"
$storageAccountName = "<storage account name>"
$roleDefinitionName = "Storage Blob Data Reader"
$userUpn = "<user UPN>"
$userObjectID = (Get-AzADUser -UserPrincipalName $userUpn).Id
$privateEndpointName = "privateendpoint1"
$scope = "/subscriptions/$subId/resourceGroups/$rgName/providers/Microsoft.Storage/storageAccounts/$storageAccountName"
$condition = `
"( `
( `
!(ActionMatches{'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read'} AND NOT SubOperationMatches{'Blob.List'}) `
) `
OR `
( `
( `
@Principal[Microsoft.Directory/CustomSecurityAttributes/Id:sensitivity] StringEqualsIgnoreCase @Resource[Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags:sensitivity<`$key_case_sensitive`$>] `
AND `
@Environment[Microsoft.Network/privateEndpoints] StringEqualsIgnoreCase '/subscriptions/$subid/resourceGroups/$rgname/providers/Microsoft.Network/privateEndpoints/$privateEndpointName' `
) `
OR `
@Resource[Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags:sensitivity<`$key_case_sensitive`$>] StringNotEquals 'high' `
) `
)"
$testRa = Get-AzRoleAssignment -Scope $scope -RoleDefinitionName $roleDefinitionName -ObjectId $userObjectID
$testRa.Condition = $condition
$testRa.ConditionVersion = "2.0"
Set-AzRoleAssignment -InputObject $testRa -PassThru