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Update sample CSS policy to handle multiple products and allow higher TCB values #380

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Merged
andpiccione merged 2 commits into from
Mar 24, 2026
Merged

Update sample CSS policy to handle multiple products and allow higher TCB values #380

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4cfaf39
Update sample CSS policy to handle multiple products and allow higher…
achamayou Mar 17, 2026
e365717
Merge branch 'main' into multi_product_threshold_tcb_policy
andpiccione Mar 23, 2026
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21 changes: 19 additions & 2 deletions test/test_perf.py
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Original file line number Diff line number Diff line change
Expand Up @@ -50,9 +50,26 @@

PPE_CSS_POLICY_SCRIPT = f"""
export function apply(phdr, uhdr, payload, details) {{
function check_tcb(ref_product, ref_tcb, reported_tcb) {{
const ref = ccf.tcbHexToPolicy(ref_product, ref_tcb);
const reported = ccf.tcbHexToPolicy(ref_product, reported_tcb);
const fields = ["microcode", "snp", "tee", "boot_loader", "fmc"];
for (const f of fields) {{
if (f in ref && reported[f] < ref[f]) {{
return false;
}}
}}
return true;
}}

// Check AMD TCB is valid
if (details.product_name != "Genoa") {{ return "Invalid AMD product name"; }}
if (details.reported_tcb.hexstring !== "541700000000000a") {{ return "Invalid reported TCB" }}
if (details.product_name === "Milan") {{
if (!check_tcb("00a00f11", "db18000000000004", details.reported_tcb.hexstring)) {{ return "Invalid reported TCB"; }}
}} else if (details.product_name === "Genoa") {{
if (!check_tcb("00a10f11", "541700000000000a", details.reported_tcb.hexstring)) {{ return "Invalid reported TCB"; }}
}} else {{
return "Unsupported product name";
}}

// Check UVM/measurement endorsement is valid
if (details.uvm_endorsements.did !== "did:x509:0:sha256:I__iuL25oXEVFdTP_aBLx_eT1RPHbCQ_ECBQfYZpt9s::eku:1.3.6.1.4.1.311.76.59.1.2") {{ return "Invalid uvm_endorsements did"; }}
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