Secure isolation of tenant resources in a multi-tenant storage system using a security gateway

• US 9,646,019 B2
• Filed: 05/17/2016
• Issued: 05/09/2017
• Est. Priority Date: 05/02/2013
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Factor, Michael E., Hadas, David, Kolodner, Elliot K., Kurmus, Anil, Shulman-Peleg, Alexandra, Sorniotti, Alessandro
• Primary Examiner(s): MORRISON, JAY A
• Application Number:
  US15/156,821
• Publication Number:
  US 20160259807A1
• Time in Patent Office: 357 Days
• Field of Search: None
• CPC Class Codes: G06F 16/176 Support for shared access to files; File sharing support
• CPC Class Codes: G06F 16/182 Distributed file systems
• CPC Class Codes: G06F 21/6218 to a system of files or objects, e.g. local or distributed file system or database
• CPC Class Codes: G06F 21/6281 at program execution time, where the protection is within the operating system
• CPC Class Codes: G06F 2221/2145 Inheriting rights or properties, e.g., propagation of permissions or restrictions within a hierarchy
• CPC Class Codes: G06F 9/00 Arrangements for program control, e.g. control units program control for peripheral devices G06F13/10
• CPC Class Codes: G06F 9/46 Multiprogramming arrangements
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/105 Multiple levels of security

Abstract

Machines, systems and methods for handling a client request in a hierarchical multi-tenant data storage system, the method comprising processing a request in subtasks, wherein a subtask is executed with a minimal set of privileges associated with a specific subtenant; extracting a claimed n-level hierarchy of a tenant and sub-tenant identities from the request; extracting authentication signatures or credentials that correspond to a level in the hierarchy; for a first level in the hierarchy, sending the request to a dedicated subtenant authenticator with privilege to validate credentials for a subtenant at the first level; and receiving a confirmation from the dedicated subtenant authenticator, whether the request is authentic.

Claims

1. A method of maintaining resource isolation in a multi-tenant computing system, the method comprising:

receiving a first request submitted by a first user in a multi-tenant computing system;

extracting from the first request a first tenant ID associated with a tenant from among a plurality of tenants in the multi-tenant computing system;

spawning a first request processor, wherein the first tenant ID is utilized by the first request processor to determine resource access privileges associated with the first tenant ID;

spawning a subtenant authenticator;

examining, by the subtenant authenticator, user credential data associated with the first request to determine whether the first user is authorized to access the one or more target resources; and

servicing the first request by providing access to one or more target resources identified in the first request, in response to determining that the first tenant ID is associated with a first tenant with privileges to access the one or more target resources.

2. The method of claim 1, wherein the security gateway determines that the first tenant ID is associated with a first tenant.

3. The method of claim 1, wherein the subtenant authenticator determines that the first user is authorized to access the one or more target resources, in response to determining that the user credential data associated with the first request matches user credential data associated with the first tenant.

4. The method of claim 3, wherein a plurality of subtenant authenticators are utilized to authenticate a plurality of requests, wherein the requests are respectively associated with a plurality of tenant IDs.

5. The method of claim 3, wherein a secure communication channel is established between the first request processor and the subtenant authenticator, wherein the user credential data is transferred over the secured communication channel to the subtenant authenticator.

6. The method of claim 1, wherein the security gateway utilizes one or more processes to service the first request by providing access to the one or more resources according to the first tenant privileges.

7. The method of claim 6, wherein a first process is utilized to provide access to a first resource and a second process is utilized to provide access to a second resource.

8. The method of claim 7, wherein the first process and the second process privileges are set so that the first process is exclusively dedicated to providing access to the first resource and the second process is exclusively dedicated to providing access to the second resource.

9. The method of claim 1, wherein the first tenant ID is embedded in a header portion of a data communication packet that includes the first request.

10. A computer system comprising:

one or more processors;

one or more non-transitory computer readable storage media;

computer program instructions;

the computer program instructions being stored on the one or more non-transitory computer readable storage media;

the computer program instructions comprising instructions to;

receive a first request submitted by a first user in a multi-tenant computing system;

extract from the first request a first tenant ID associated with a tenant from among a plurality of tenants in the multi-tenant computing system;

spawn a first request processor, wherein the first tenant ID is utilized by the first request processor to determine resource access privileges associated with the first tenant ID;

spawn a subtenant authenticator;

examine, by the subtenant authenticator, user credential data associated with the first request to determine whether the first user is authorized to access the one or more target resources; and

service the first request by providing access to one or more target resources identified in the first request, in response to determining that the first tenant ID is associated with a first tenant with privileges to access the one or more target resources.

11. The computer system of claim 10, wherein the security gateway determines that the first tenant ID is associated with a first tenant.

12. The computer system of claim 10, wherein the subtenant authenticator determines that the first user is authorized to access the one or more target resources, in response to determining that the user credential data associated with the first request matches user credential data associated with the first tenant.

13. The computer system of claim 12, wherein a plurality of subtenant authenticators are utilized to authenticate a plurality of requests, wherein the requests are respectively associated with a plurality of tenant IDs.

14. The computer system of claim 12, wherein a secure communication channel is established between the first request processor and the subtenant authenticator, wherein the user credential data is transferred over the secured communication channel to the subtenant authenticator.

15. The computer system of claim 10, wherein the security gateway utilizes one or more processes to service the first request by providing access to the one or more resources according to the first tenant privileges.

16. The computer system of claim 15, wherein the first tenant ID is embedded in a header portion of a data communication packet that includes the first request.

17. A computer program product comprising logic code embedded in a non-transitory data storage medium for maintaining resource isolation in a multi-tenant computing system, wherein execution of the logic code on a computer causes the computer to:

receive a first request submitted by a first user in a multi-tenant computing system;

extract from the first request a first tenant ID associated with a tenant from among a plurality of tenants in the multi-tenant computing system;

spawn a first request processor, wherein the first tenant ID is utilized by the first request processor to determine resource access privileges associated with the first tenant ID;

spawn a subtenant authenticator;

examine, by the subtenant authenticator, user credential data associated with the first request to determine whether the first user is authorized to access the one or more target resources; and

service the first request by providing access to one or more target resources identified in the first request, in response to determining that the first tenant ID is associated with a first tenant with privileges to access the one or more target resources.

18. The computer program product of claim 17, wherein the subtenant authenticator determines that the first user is authorized to access the one or more target resources, in response to determining that the user credential data associated with the first request matches user credential data associated with the first tenant.

19. The computer program product of claim 18, wherein a plurality of subtenant authenticators are utilized to authenticate a plurality of requests, wherein the requests are respectively associated with a plurality of tenant IDs.

20. The computer program product of claim 19, wherein a secure communication channel is established between the first request processor and the subtenant authenticator, wherein the user credential data is transferred over the secured communication channel to the subtenant authenticator.