azure:az-500:storage_security

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azure:az-500:storage_security [2022/07/20 18:47] – [Shared Access Signature(SAS)] mmuzeazure:az-500:storage_security [2022/07/20 19:08] (current) – [Shared Access Signature(SAS)] mmuze
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   * [[https://docs.microsoft.com/en-us/azure/storage/common/storage-sas-overview]]   * [[https://docs.microsoft.com/en-us/azure/storage/common/storage-sas-overview]]
   * [[https://docs.microsoft.com/en-us/azure/storage/blobs/authorize-access-azure-active-directory|Azure AD]] is the recommended way to provide authorization for storage account access.   * [[https://docs.microsoft.com/en-us/azure/storage/blobs/authorize-access-azure-active-directory|Azure AD]] is the recommended way to provide authorization for storage account access.
-  * A [[https://docs.microsoft.com/en-us/rest/api/storageservices/define-stored-access-policy|stored access policy]] is an additional level of protection that can be used in conjunction with //service-level shared access signatures (SAS)// authentication. It provides and expiration date and permissions that can be used independent of the SAS token/URL. This provides more flexibility for revoking access. 
- 
  
 ==== Types of Authorization ==== ==== Types of Authorization ====
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   * SAS is a string that contains a security token that can be attached to a URI that gives access to storage objects   * SAS is a string that contains a security token that can be attached to a URI that gives access to storage objects
   * [[https://docs.microsoft.com/en-us/azure/storage/common/storage-sas-overview]]   * [[https://docs.microsoft.com/en-us/azure/storage/common/storage-sas-overview]]
-  * There are two types of **SAS**. **Ad hoc SAS** where the expiry and permissions are part of the SAS URI and Service **SAS** with **stored access policy** where the SAS references the policy that defines the expiry and permissions. 
  
-  * The only way to revoke a SAS is to revoke (regenerate) the access key that was used to sign it. This is not ideal because that key could be used in other ways and this would be a disruptive operation. That is where a **stored access policy** can be of use (for service-level SAS only).+  * The only way to revoke a SAS (that was signed by a key) is to revoke (regenerate) the access key that was used to sign it. This is not ideal because that key could be used in other ways and this would be a disruptive operation. That is where a **stored access policy** can be of use (for service-level SAS only). 
 +  * There are tree types of SAS, user delegated, service SAS and account SAS.
   * A **user delegation** SAS is secured with Azure Active Directory (Azure AD) credentials and also by the permissions specified for the SAS. A user delegation SAS applies to Blob storage only.   * A **user delegation** SAS is secured with Azure Active Directory (Azure AD) credentials and also by the permissions specified for the SAS. A user delegation SAS applies to Blob storage only.
   * A **service SAS** is secured with the storage account key. A service SAS delegates access to a resource in only one of the Azure Storage services: Blob storage, Queue storage, Table storage, or Azure Files. A service-level SAS applies to just one service (e.g. blob, Azure Files...).   * A **service SAS** is secured with the storage account key. A service SAS delegates access to a resource in only one of the Azure Storage services: Blob storage, Queue storage, Table storage, or Azure Files. A service-level SAS applies to just one service (e.g. blob, Azure Files...).
   * An **account SAS** is secured with the storage account key. An account SAS delegates access to resources in one or more of the storage services. All of the operations available via a service or user delegation SAS are also available via an account SAS. Account-level SAS applies to the Storage Account, therefore it could apply to any number of containers/Azure Storage Services in the account.   * An **account SAS** is secured with the storage account key. An account SAS delegates access to resources in one or more of the storage services. All of the operations available via a service or user delegation SAS are also available via an account SAS. Account-level SAS applies to the Storage Account, therefore it could apply to any number of containers/Azure Storage Services in the account.
  
-==== Types ==== +  * A **SAS** can take one of two forms. **Ad hoc SAS** where the expiry and permissions are part of the SAS URI and Service **SAS** with **stored access policy** where the SAS references the policy that defines the expiry and permissions. 
-  * **service-level**, gives access at the storage account level +    * A user delegated SAS and account SAS must be an ad hoc SAS
-  * **account level ** +
-  * **user delegation SAS**+
  
 ===== Stored Access Policy ===== ===== Stored Access Policy =====
 > A stored access policy provides an additional level of control over service-level shared access signatures (SAS) on the server side. > A stored access policy provides an additional level of control over service-level shared access signatures (SAS) on the server side.
 +  * A [[https://docs.microsoft.com/en-us/rest/api/storageservices/define-stored-access-policy|stored access policy]] is an additional level of protection that can be used in conjunction with //service-level shared access signatures (SAS)// authentication. It provides and expiration date and permissions that can be used independent of the SAS token/URL. This provides more flexibility for revoking access.
   * [[https://docs.microsoft.com/en-us/rest/api/storageservices/define-stored-access-policy]]   * [[https://docs.microsoft.com/en-us/rest/api/storageservices/define-stored-access-policy]]
  
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  • Last modified: 2022/07/20 18:47
  • by mmuze