Enclave interactions
Aspects of the disclosure provide various methods relating to enclaves. For instance, a method of authentication for an enclave entity with a second entity may include receiving, by one or more processors of a host computing device of the enclave entity, a request and an assertion of identity for the second entity, the assertion including identity information for the second identity; using an assertion verifier of the enclave entity to determine whether the assertion is valid; when the assertion is valid, extracting the identity information; authenticating the second entity using an access control list for the enclave entity to determine whether the identity information meets expectations of the access control list; when the identity information meets the expectations of the access control list, completing the request.
1. A method for sealing secrets in a first enclave entity of a host computing device, the method comprising:
inputting, by one or more processors of the host computing device, a header and a secret to a sealing library of the first enclave entity, the header comprising an identity access control list for the secret;
generating, by the one or more processors, a key using the sealing library;
sending, by the one or more processors, the key and the identity access control list to a second enclave entity;
receiving, by the one or more processors, a sealed version of the key from the second enclave entity;
sealing, by the one or more processors, the secret using sealing library; and
appending, by the one or more processors, the sealed version of the key and the identity access control list to the sealed secret.
2. The method of claim 1 , wherein the sealing library comprises instructions for unsealing data by accepting sealed data and outputting the unsealed data.
3. The method of claim 1 , further comprising establishing, by the one or more processors, communications with the second enclave entity via a remote procedure call by identifying a location of the second enclave entity using the sealing library.
4. The method of claim 1 , further comprising authenticating, by the one or more processors, the second enclave entity using the identity access control list before sending the key.
5. The method of claim 1 , further comprising sending, by the one or more processors, the sealed secret appended with the sealed version of the key to a third enclave entity.
6. The method of claim 1 , wherein the identity access control list identifies one or more entities that are able to unseal the sealed secret.
7. The method of claim 1 , wherein sealing the secret comprises sealing the secret to a whitelist that allows any enclave entity whose identity fulfills at least one identity expectation in the identity access control list to unseal the sealed secret.
8. The method of claim 1 , further comprising:
inputting, by the one or more processors, a second sealed secret to the sealing library, the second sealed secret comprising an appended sealed version of a second key;
sending, by the one or more processors, a request to unseal the second sealed secret to a third enclave entity;
receiving, by the one or more processors, an unsealed version of the second key; and
unsealing, by the one or more processors, the second sealed secret using the sealing library.
9. The method of claim 8 , wherein the third enclave entity is one of a plurality of identical enclave instances respectively running identical code and in possession of a shared master secret, wherein the first enclave entity is able to send the request to any of the plurality of identical enclave instances.
10. The method of claim 1 , wherein the second enclave entity is a remote sealing root.
11. The method of claim 1 , wherein the first enclave entity and the second enclave entity are located in local memory of the host computing device.
12. The method of claim 1 , wherein the second enclave entity is located in local memory of a second host computing device.
13. A system comprising:
one or more processors; and
one or more storage devices coupled to the one or more processors and storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations for sealing secrets in a first enclave entity of a host computing device, the operations comprising:
inputting a header and a secret to a sealing library of the first enclave entity, the header comprising an identity access control list for the secret;
generating a key using the sealing library;
sending the key and the identity access control list to a second enclave entity;
receiving a sealed version of the key from the second enclave entity;
sealing the secret using sealing library; and
appending the sealed version of the key and the identity access control list to the sealed secret.
14. The system of claim 13 , wherein the sealing library comprises instructions for unsealing data by accepting sealed data and outputting the unsealed data.
15. The system of claim 13 , wherein the operations further comprise establishing communications with the second enclave entity via a remote procedure call by identifying a location of the second enclave entity using the sealing library.
16. The system of claim 13 , wherein the operations further comprise authenticating the second enclave entity using the identity access control list before sending the key.
17. The system of claim 13 , wherein sealing the secret comprises sealing the secret to a whitelist that allows any enclave entity whose identity fulfills at least one identity expectation in the identity access control list to unseal the sealed secret.
18. The system of claim 13 , wherein the operations further comprise:
inputting a second sealed secret to the sealing library, the second sealed secret comprising an appended sealed version of a second key;
sending a request to unseal the second sealed secret to a third enclave entity;
receiving an unsealed version of the second key; and
unsealing the second sealed secret using the sealing library.
19. The system of claim 18 , wherein the third enclave entity is one of a plurality of identical enclave instances respectively running identical code and in possession of a shared master secret, wherein the first enclave entity is able to send the request to any of the plurality of identical enclave instances.
20. A non-transitory computer readable medium for storing instruction that, when executed by one or more processors, cause the one or more processors to perform operations for sealing secrets in a first enclave entity of a host computing device, the operations comprising:
inputting a header and a secret to a sealing library of the first enclave entity, the header comprising an identity access control list for the secret;
generating a key using the sealing library;
sending the key and the identity access control list to a second enclave entity;
receiving a sealed version of the key from the second enclave entity;
sealing the secret using sealing library; and
appending the sealed version of the key and the identity access control list to the sealed secret.