Skip to content

parse PIID from PCK SGX extensions #2

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
burgerdev merged 1 commit into from
Jan 12, 2026
Merged

parse PIID from PCK SGX extensions #2

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 10 additions & 0 deletions pcs/pcs.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@ const (
pckCertExtensionSize = 6
sgxExtensionMinSize = 4
tcbExtensionSize = 18
piidSize = 16
ppidSize = 16
cpuSvnSize = 16
fmspcSize = 6
Expand Down Expand Up @@ -77,6 +78,8 @@ var (
OidFMSPC = asn1.ObjectIdentifier([]int{1, 2, 840, 113741, 1, 13, 1, 4})
// OidSGXType is the x509v3 extension for PCK certificate's SGX Extensions SGX Type value.
OidSGXType = asn1.ObjectIdentifier([]int{1, 2, 840, 113741, 1, 13, 1, 5})
// OidPIID is the x509v3 extension for PCK certificate's SGX Extensions PIID value.
OidPIID = asn1.ObjectIdentifier([]int{1, 2, 840, 113741, 1, 13, 1, 6})

// ErrPckExtInvalid error returned when parsing PCK certificate's extension returns leftover bytes
ErrPckExtInvalid = errors.New("unexpected leftover bytes for PCK certificate's extension")
Expand Down Expand Up @@ -185,6 +188,7 @@ type PckExtensions struct {
PCEID string
FMSPC string
SGXType SGXType
PIID string
}

// SGXType represents the type of the platform for which the PCK certificate was created
Expand Down Expand Up @@ -466,6 +470,12 @@ func extractSgxExtensions(extensions []asn1.RawValue) (*PckExtensions, error) {
}
pckExtension.SGXType = SGXType(sExtension.Value)
}
if sExtension.Type.Equal(OidPIID) {
pckExtension.PIID, err = extractAsn1OctetStringExtension("PIID", extensions[i], piidSize)
if err != nil {
return nil, err
}
}
}
return pckExtension, nil
}
Expand Down
2 changes: 2 additions & 0 deletions verify/verify_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -100,9 +100,11 @@ func TestPckCertificateExtensions(t *testing.T) {
}
pckExt := &pcs.PckExtensions{}
ppidBytes := []byte{8, 157, 223, 219, 156, 3, 89, 200, 42, 59, 199, 113, 146, 57, 87, 78}
piidBytes := []byte{0x8c, 0x31, 0x4d, 0x17, 0xd2, 0x5, 0xdf, 0xaf, 0xcb, 0xec, 0xbb, 0x0, 0xfc, 0x87, 0xef, 0xf7}
fmspcBytes := []byte{80, 128, 111, 0, 0, 0}
pceIDBytes := []byte{0, 0}
pckExt.PPID = hex.EncodeToString(ppidBytes)
pckExt.PIID = hex.EncodeToString(piidBytes)
pckExt.FMSPC = hex.EncodeToString(fmspcBytes)
pckExt.PCEID = hex.EncodeToString(pceIDBytes)
pckExt.SGXType = pcs.SGXTypeScalable
Expand Down
Loading