Attestation Certificate Authority (ACA) and TPM Provisioning with Trusted Computing-based Supply Chain Validation
The Host Integrity at Runtime and Start-up Attestation Certificate Authority is a Proof of Concept - Prototype intended to spur interest and adoption of the Trusted Platform Module (TPM). It's intended for testing and development purposes only and is not intended for production. The ACA's functionality supports the provisioning of both the TPM 1.2 and TPM 2.0 with an Attestation Identity Credential (AIC). The ACA can be configured to enforce the Validation of Endorsement and Platform Credentials to illustrate a supply chain capability. It also includes several tools for generating test patterns (Platform Credentials) and generating SWID tags.
The ACA provides a “provisioner” application to be installed on all devices which will be requesting Attestation Credentials.
The ACA is a web based server which processes Attestation Identity Requests.
- TPM Provisioner
- Requests an Attestation Identity Credential for the TPM from the ACA.
- Takes ownership of TPM if not owned
- Uses REST calls to complete the transaction with the ACA
- Reads credentials from the TPM's NvRAM as part of the provisioning process.
- Reads the device's hardware, network, firmware, and OS info for platform validation
- Attestation Certificate Authority
- Issues Attestation Identity Credentials to validated devices holding a TPM
- Configures policies for enabling/disabling validation procedures
- Performs TCG-based Supply Chain Validation of connecting clients
- Optionally validates Endorsement and Platform Credentials
- Endorsement Credential Certificate Chain Validation
- Process EK Credentials per TCG EK Credential Profile For TPM Family 2.0; Level 0 Revision 14
- Verifies the endorsement key used by the TPM was placed there by the original equipment manufacturer (OEM)
- Platform Credential Certificate Chain Validation
- Process Platform Credentials per TCG Platform Attribute Credential Profile Specification Version 1.0 Revision 16
- Verifies the provenance of the system's hardware components, such as the motherboard and chassis, by comparing measured component information against the manufacturers, models, and serial numbers listed in the Platform Credential
- Attestation CA Dashboard
- Displays all Validation Reports, Credentials, and Trust Chains
- Enables ACA policy configuration for validation of Endorsement and Platform Credentials
- Enables Import/Export of Certificate (Trust) Chains, Endorsement Credentials, and Platform Credentials
- Optionally allows uploaded credentials to be used in validation for machines that have been reprovisioned by trusted parties since leaving the OEM
The HIRS Attestation Certificate Authority (ACA) supports installation on CentOS 6 and 7 instances.
The HIRS Provisioner supports both types of TPMs, 1.2 and 2.0. TPM 1.2 support is available on CentOS 6 and 7. Due to the limitations on the libraries available on Centos 6, TPM 2.0 support is only available on Centos 7.
For detailed instructions, see Installation notes.
Packages used for installation (e.g. HIRS_Provisioner*el7.noarch.rpm) can be found on the release page.
Simply run the command yum install HIRS_AttestationCA*el6.noarch.rpm or yum install HIRS_AttestationCA*el7.noarch.rpm based on your OS.
After enabling your TPM in BIOS/UEFI, determine if your machine has a TPM 1.2 or a TPM 2.0 by using the command:
dmesg | grep -i tpm_tis.
To install a TPM 1.2 Provisioner, run:
yum install tpm_module*.rpm
yum install HIRS_Provisioner*el6.noarch.rpm or yum install HIRS_Provisioner*el7.noarch.rpm based on OS
hirs-provisioner -c
To install a TPM 2.0 Provisioner, run:
yum install hirs-provisioner-tpm2*.rpm
To configure the provisioner, edit the hirs-site.config file in /etc/hirs/hirs-site.config. Edit the file to specify the ACA's fully qualified domain name and port.
To kick off a provision on the client, run the command sudo tpm_aca_provision.
To see the results and interact with the ACA, go to the ACA Portal at https://ACAPortalAddress:ACAPortalPort/HIRS_AttestationCAPortal/portal/index.