可以通过尝试分配权限并检查错误消息来 枚举 Workspace 域的有效电子邮件和 SA 电子邮件。为此，你只需要有权限将权限分配给一个项目（该项目可以仅由你拥有）。
请注意，要检查它们，但即使它们存在也不授予它们权限，你可以在是 user 时使用类型 serviceAccount，在是 SA 时使用 user：
# Try to assign permissions to user 'unvalid-email-34r434f@hacktricks.xyz'# but indicating it's a service accountgcloudprojectsadd-iam-policy-binding<project-controlled-by-you> \--member='serviceAccount:unvalid-email-34r434f@hacktricks.xyz' \--role='roles/viewer'## Response:ERROR: (gcloud.projects.add-iam-policy-binding) INVALID_ARGUMENT: User unvalid-email-34r434f@hacktricks.xyz does not exist.# Now try with a valid emailgcloudprojectsadd-iam-policy-binding<project-controlled-by-you> \--member='serviceAccount:support@hacktricks.xyz' \--role='roles/viewer'# Response:ERROR: (gcloud.projects.add-iam-policy-binding) INVALID_ARGUMENT: Principal support@hacktricks.xyz is of type "user". The principal should appear as "user:support@hacktricks.xyz". See https://cloud.google.com/iam/help/members/types for additional documentation.
// Exists{"error": {"code":403,"message":"Method doesn't allow unregistered callers (callers without established identity). Please use API Key or other form of API consumer identity to call this API.","status":"PERMISSION_DENIED"}}// Doesn't exist{"error": {"code":404,"message":"Unknown service account","status":"NOT_FOUND"}}
# Non existentgcloudprojectsadd-iam-policy-binding<project-controlled-by-you> \--member='serviceAccount:<invalid-sa-name>@<proj-uniq-name>.iam.gserviceaccount.com' \--role='roles/viewer'# ResponseERROR: (gcloud.projects.add-iam-policy-binding) INVALID_ARGUMENT: User <invalid-sa-name>@<proj-uniq-name>.iam.gserviceaccount.com does not exist.# Existentgcloudprojectsadd-iam-policy-binding<project-controlled-by-you> \--member='serviceAccount:<sa-name>@<proj-uniq-name>.iam.gserviceaccount.com' \--role='roles/viewer'# ResponseERROR: (gcloud.projects.add-iam-policy-binding) INVALID_ARGUMENT: Principal testing@digital-bonfire-410512.iam.gserviceaccount.com is of type "serviceAccount". The principal should appear as "serviceAccount:testing@digital-bonfire-410512.iam.gserviceaccount.com". See https://cloud.google.com/iam/help/members/types for additional documentation.
