Chassis internal device security
Methods, systems, and computer programs encoded on computer storage medium, for verifying, by a mask ROM of a CPU of a first computing device and with fused keys included by the CPU, a boot loader that is included by a flash memory of the first computing device, in response to verifying the boot loader, verifying, by the boot loader and with boot loader keys included by the flash memory, a kernel included by the a memory device of the first computing device, in response to verifying the kernel, decrypting, by the kernel using a hidden root key (HRK) included by the CPU of the first computing device, a device unique certification (DUC) included by the flash memory, in response to decrypting the DUC, generating, by the first computing device, a proof-of-possession of the DUC.
1. A computer-implemented method, comprising:
identifying a plurality of computing devices, each of the computing devices including at least a central processing unit (CPU), a flash memory, and a memory device;
registering, by a first computing device of the plurality of computing devices, as a client of a second, differing computing device of the plurality of computing devices;
in response to registering the first computing device as a client of the second computing device, authorizing the first computing device with the second computing device, the authorizing including:
verifying, by a mask ROM of the CPU of the first computing device and with fused keys included by the CPU, a boot loader that is included by the flash memory of the first computing device;
in response to verifying the boot loader, verifying, by the boot loader and with boot loader keys included by the flash memory, a kernel included by the memory device of the first computing device;
in response to verifying the kernel, decrypting, by the kernel using a hidden root key (HRK) included by the CPU of the first computing device, a device unique certification (DUC) included by the flash memory;
in response to decrypting the DUC, generating, by the first computing device, the proof-of-possession of the DUC;
providing, by the first computing device, the proof-of-possession to the second computing device to authorize the first computing device as a client of the second computing device; and
in response to authorizing the first computing device as a client of the second computing device, establishing, by the first computing device, a secure communication channel with the second computing device.
2. The computer-implemented method of claim 1 , wherein the DUC is unique to the first computing device.
3. The computer-implemented method of claim 1 , further comprising:
registering, by the second computing device, as a client of the first computing device;
in response to registering the second computing device as a client of the first computing device, authorizing the second computing device with the first computing device, the authorizing including a chain of verification steps that verifies in sequence each step of a boot process by the previous step to generate a proof-of-possession of an additional device unique certification (DUC);
providing, by the second computing device, the proof-of-possession to the first computing device to authorize the second computing device as a client of the first computing device; and
in response to authorizing the second computing device as a client of the first computing device, establishing, by the second computing device, an additional secure communication channel with the first computing device.
4. The computer-implemented method of claim 3 , wherein authorizing the second computing device with the first computing device further comprises:
verifying, by a mask ROM of the CPU of the second computing device and with fused keys included by the CPU, a boot loader that is included by the flash memory of the second computing device;
in response to verifying the boot loader, verifying, by the boot loader and with boot loader keys included by the flash memory, a kernel included by the memory device of the second computing device;
in response to verifying the kernel, decrypting, by the kernel using a hidden root key (HRK) included by the CPU of the second computing device, an additional device unique certification (DUC) included by the flash memory; and
in response to decrypting the additional DUC, generating, by the second computing device, the proof-of-possession of the additional DUC.
5. The computer-implemented method of claim 4 , further comprising:
providing, to the second computing device and from the first computing device, a public portion of the DUC;
verifying, by the second computing device, a root of trust signature on the DUC;
in response to verifying the root of trust signature on the DUC, creating a key based on the public portion of the DUC and a private portion of the additional DUC to encrypt a SSL certificate of the second computing device;
providing, to the first computing device and from the second computing device, the encrypted SSL certificate and a public portion of the additional DUC;
combining, by the first computing device, the public portion of the additional DUC with a private portion of the DUC to decrypt the SSL certificate; and
verifying, by the first computing device, the SSL certification.
6. The computer-implemented method of claim 3 , wherein the DUC of the first computing device is unique to the first computing device, and the additional DUC of the second computing device is unique to the second computing device.
7. The computer-implemented method of claim 1 , further comprising:
denying a verification, by the mask ROM of the CPU of the first computing device and with the fused keys included by the CPU, the boot loader that is included by the flash memory of the first computing device, and
in response to denying the verification of the boot loader, preventing further booting of the first computing device.
8. The computer-implemented method of claim 1 , further comprising:
in response to verifying the boot loader, denying a verification, by the boot loader and with the boot loader keys included by the flash memory, the kernel included by the memory device of the first computing device, and
in response to denying the verification of the kernel, disabling the HRK included by the CPU of the first computing device.
9. The computer-implemented method of claim 8 , further comprising:
in response to denying the verification of the kernel, forgoing decryption of the DUC included by the flash memory of the first computing device.
10. The computer-implemented method of claim 1 , wherein each of the computing devices are physically included by a common chassis system.
11. The computer-implemented method of claim 1 , wherein registration, by the first computing device, as a client of the second computing device is initiated upon booting of the first computing device.
12. The computer-implemented method of claim 1 , wherein the DUC is preloaded onto the first computing device and is signed by a private key of a root of trust.
13. A system comprising a processor having access to memory media storing instructions executable by the processor to perform operations comprising:
identifying a plurality of computing devices, each of the computing devices including at least a central processing unit (CPU), a flash memory, and a memory device;
registering, by a first computing device of the plurality of computing devices, as a client of a second, differing computing device of the plurality of computing devices;
in response to registering the first computing device as a client of the second computing device, authorizing the first computing device with the second computing device, the authorizing including:
verifying, by a mask ROM of the CPU of the first computing device and with fused keys included by the CPU, a boot loader that is included by the flash memory of the first computing device;
in response to verifying the boot loader, verifying, by the boot loader and with boot loader keys included by the flash memory, a kernel included by the memory device of the first computing device;
in response to verifying the kernel, decrypting, by the kernel using a hidden root key (HRK) included by the CPU of the first computing device, a device unique certification (DUC) included by the flash memory; and
in response to decrypting the DUC, generating, by the first computing device, the proof-of-possession of the DUC;
providing, by the first computing device, the proof-of-possession to the second computing device to authorize the first computing device as a client of the second computing device; and
in response to authorizing the first computing device as a client of the second computing device, establishing, by the first computing device, a secure communication channel with the second computing device.
14. The system of claim 13 , wherein the DUC is unique to the first computing device.
15. The system of claim 13 , the operations further comprising:
registering, by the second computing device, as a client of the first computing device;
in response to registering the second computing device as a client of the first computing device, authorizing the second computing device with the first computing device, the authorizing including a chain of verification steps that verifies in sequence each step of a boot process by the previous step to generate a proof-of-possession of an additional device unique certification (DUC);
providing, by the second computing device, the proof-of-possession to the first computing device to authorize the second computing device as a client of the first computing device; and
in response to authorizing the second computing device as a client of the first computing device, establishing, by the second computing device, an additional secure communication channel with the first computing device.
16. The system of claim 15 , wherein authorizing the second computing device with the first computing device further comprises:
verifying, by a mask ROM of the CPU of the second computing device and with fused keys included by the CPU, a boot loader that is included by the flash memory of the second computing device;
in response to verifying the boot loader, verifying, by the boot loader and with boot loader keys included by the flash memory, a kernel included by the memory device of the second computing device;
in response to verifying the kernel, decrypting, by the kernel using a hidden root key (HRK) included by the CPU of the second computing device, an additional device unique certification (DUC) included by the flash memory; and
in response to decrypting the additional DUC, generating, by the second computing device, the proof-of-possession of the additional DUC.
17. A non-transitory computer-readable medium storing software comprising instructions executable by one or more computers which, upon such execution, cause the one or more computers to perform operations comprising:
identifying a plurality of computing devices, each of the computing devices including at least a central processing unit (CPU), a flash memory, and a memory device;
registering, by a first computing device of the plurality of computing devices, as a client of a second, differing computing device of the plurality of computing devices;
in response to registering the first computing device as a client of the second computing device, authorizing the first computing device with the second computing device, the authorizing including:
verifying, by a mask ROM of the CPU of the first computing device and with fused keys included by the CPU, a boot loader that is included by the flash memory of the first computing device;
in response to verifying the boot loader, verifying, by the boot loader and with boot loader keys included by the flash memory, a kernel included by the memory device of the first computing device;
in response to verifying the kernel, decrypting, by the kernel using a hidden root key (HRK) included by the CPU of the first computing device, a device unique certification (DUC) included by the flash memory; and
in response to decrypting the DUC, generating, by the first computing device, the proof-of-possession of the DUC;
providing, by the first computing device, the proof-of-possession to the second computing device to authorize the first computing device as a client of the second computing device; and
in response to authorizing the first computing device as a client of the second computing device, establishing, by the first computing device, a secure communication channel with the second computing device.