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overrides.go
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overrides.go
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/*
Copyright (c) Edgeless Systems GmbH
SPDX-License-Identifier: AGPL-3.0-only
*/
package measurements
import (
"fmt"
"github.com/edgelesssys/constellation/v2/internal/attestation/variant"
"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
)
var measurementOverridesForCSP = map[string]measurementOverride{
cloudprovider.AWS.String(): {
MustEnforce: []uint32{
4, 8, 9, 11, 12, 13, uint32(PCRIndexClusterID),
},
MustWarn: []uint32{
0, 2, 3, 6, 14,
},
ValueOverrides: []valueOverride{
{Index: 2, Value: []byte{0x3d, 0x45, 0x8c, 0xfe, 0x55, 0xcc, 0x03, 0xea, 0x1f, 0x44, 0x3f, 0x15, 0x62, 0xbe, 0xec, 0x8d, 0xf5, 0x1c, 0x75, 0xe1, 0x4a, 0x9f, 0xcf, 0x9a, 0x72, 0x34, 0xa1, 0x3f, 0x19, 0x8e, 0x79, 0x69}},
{Index: 3, Value: []byte{0x3d, 0x45, 0x8c, 0xfe, 0x55, 0xcc, 0x03, 0xea, 0x1f, 0x44, 0x3f, 0x15, 0x62, 0xbe, 0xec, 0x8d, 0xf5, 0x1c, 0x75, 0xe1, 0x4a, 0x9f, 0xcf, 0x9a, 0x72, 0x34, 0xa1, 0x3f, 0x19, 0x8e, 0x79, 0x69}},
{Index: 6, Value: []byte{0x3d, 0x45, 0x8c, 0xfe, 0x55, 0xcc, 0x03, 0xea, 0x1f, 0x44, 0x3f, 0x15, 0x62, 0xbe, 0xec, 0x8d, 0xf5, 0x1c, 0x75, 0xe1, 0x4a, 0x9f, 0xcf, 0x9a, 0x72, 0x34, 0xa1, 0x3f, 0x19, 0x8e, 0x79, 0x69}},
{Index: 14, Value: []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
},
},
cloudprovider.Azure.String(): {
MustEnforce: []uint32{
4, 8, 9, 11, 12, 13, uint32(PCRIndexClusterID),
},
MustWarn: []uint32{
1, 2, 3, 14,
},
ValueOverrides: []valueOverride{
{Index: 1, Value: []byte{0x3d, 0x45, 0x8c, 0xfe, 0x55, 0xcc, 0x03, 0xea, 0x1f, 0x44, 0x3f, 0x15, 0x62, 0xbe, 0xec, 0x8d, 0xf5, 0x1c, 0x75, 0xe1, 0x4a, 0x9f, 0xcf, 0x9a, 0x72, 0x34, 0xa1, 0x3f, 0x19, 0x8e, 0x79, 0x69}},
{Index: 2, Value: []byte{0x3d, 0x45, 0x8c, 0xfe, 0x55, 0xcc, 0x03, 0xea, 0x1f, 0x44, 0x3f, 0x15, 0x62, 0xbe, 0xec, 0x8d, 0xf5, 0x1c, 0x75, 0xe1, 0x4a, 0x9f, 0xcf, 0x9a, 0x72, 0x34, 0xa1, 0x3f, 0x19, 0x8e, 0x79, 0x69}},
{Index: 3, Value: []byte{0x3d, 0x45, 0x8c, 0xfe, 0x55, 0xcc, 0x03, 0xea, 0x1f, 0x44, 0x3f, 0x15, 0x62, 0xbe, 0xec, 0x8d, 0xf5, 0x1c, 0x75, 0xe1, 0x4a, 0x9f, 0xcf, 0x9a, 0x72, 0x34, 0xa1, 0x3f, 0x19, 0x8e, 0x79, 0x69}},
{Index: 14, Value: []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
},
},
cloudprovider.GCP.String(): {
MustEnforce: []uint32{
4, 8, 9, 11, 12, 13, uint32(PCRIndexClusterID),
},
MustWarn: []uint32{
1, 2, 3, 6, 14,
},
ValueOverrides: []valueOverride{
{Index: 1, Value: []byte{0x36, 0x95, 0xdc, 0xc5, 0x5e, 0x3a, 0xa3, 0x40, 0x27, 0xc2, 0x77, 0x93, 0xc8, 0x5c, 0x72, 0x3c, 0x69, 0x7d, 0x70, 0x8c, 0x42, 0xd1, 0xf7, 0x3b, 0xd6, 0xfa, 0x4f, 0x26, 0x60, 0x8a, 0x5b, 0x24}},
{Index: 2, Value: []byte{0x3d, 0x45, 0x8c, 0xfe, 0x55, 0xcc, 0x03, 0xea, 0x1f, 0x44, 0x3f, 0x15, 0x62, 0xbe, 0xec, 0x8d, 0xf5, 0x1c, 0x75, 0xe1, 0x4a, 0x9f, 0xcf, 0x9a, 0x72, 0x34, 0xa1, 0x3f, 0x19, 0x8e, 0x79, 0x69}},
{Index: 3, Value: []byte{0x3d, 0x45, 0x8c, 0xfe, 0x55, 0xcc, 0x03, 0xea, 0x1f, 0x44, 0x3f, 0x15, 0x62, 0xbe, 0xec, 0x8d, 0xf5, 0x1c, 0x75, 0xe1, 0x4a, 0x9f, 0xcf, 0x9a, 0x72, 0x34, 0xa1, 0x3f, 0x19, 0x8e, 0x79, 0x69}},
{Index: 6, Value: []byte{0x3d, 0x45, 0x8c, 0xfe, 0x55, 0xcc, 0x03, 0xea, 0x1f, 0x44, 0x3f, 0x15, 0x62, 0xbe, 0xec, 0x8d, 0xf5, 0x1c, 0x75, 0xe1, 0x4a, 0x9f, 0xcf, 0x9a, 0x72, 0x34, 0xa1, 0x3f, 0x19, 0x8e, 0x79, 0x69}},
{Index: 14, Value: []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
},
},
cloudprovider.OpenStack.String(): {
MustEnforce: []uint32{
4, 8, 9, 11, 12, 13, uint32(PCRIndexClusterID),
},
MustWarn: []uint32{
14,
},
ValueOverrides: []valueOverride{
{Index: 14, Value: []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
},
},
}
var measurementOverridesForAttestationVariant = map[string]measurementOverride{
variant.AWSNitroTPM{}.String(): {
ValueOverrides: []valueOverride{
{Index: 0, Value: []byte{0x73, 0x7f, 0x76, 0x7a, 0x12, 0xf5, 0x4e, 0x70, 0xee, 0xcb, 0xc8, 0x68, 0x40, 0x11, 0x32, 0x3a, 0xe2, 0xfe, 0x2d, 0xd9, 0xf9, 0x07, 0x85, 0x57, 0x79, 0x69, 0xd7, 0xa2, 0x01, 0x3e, 0x8c, 0x12}},
},
},
variant.AWSSEVSNP{}.String(): {
ValueOverrides: []valueOverride{
{Index: 0, Value: []byte{0x7b, 0x06, 0x8c, 0x0c, 0x3a, 0xc2, 0x9a, 0xfe, 0x26, 0x41, 0x34, 0x53, 0x6b, 0x9b, 0xe2, 0x6f, 0x1d, 0x4c, 0xcd, 0x57, 0x5b, 0x88, 0xd3, 0xc3, 0xce, 0xab, 0xf3, 0x6a, 0xc9, 0x9c, 0x02, 0x78}},
},
},
}
type measurementOverride struct {
MustEnforce []uint32
MustWarn []uint32
ValueOverrides []valueOverride
}
type valueOverride struct {
Index uint32
Value []byte
}
// ApplyOverrides applies overrides to the given measurements.
func ApplyOverrides(in M, csp cloudprovider.Provider, attestationVariant string) (M, error) {
out := in.Copy()
var matchingOverrides []measurementOverride
if attestationVariantOverride, ok := measurementOverridesForAttestationVariant[attestationVariant]; ok {
matchingOverrides = append(matchingOverrides, attestationVariantOverride)
}
if cspOverride, ok := measurementOverridesForCSP[csp.String()]; ok {
matchingOverrides = append(matchingOverrides, cspOverride)
}
for _, override := range matchingOverrides {
for _, i := range override.ValueOverrides {
m, ok := out[i.Index]
if !ok {
m = Measurement{}
}
m.Expected = i.Value
out[i.Index] = m
}
for _, i := range override.MustEnforce {
m, ok := out[i]
if !ok {
return nil, fmt.Errorf("missing measurement for PCR %d", i)
}
m.ValidationOpt = Enforce
out[i] = m
}
for _, i := range override.MustWarn {
m, ok := out[i]
if !ok {
return nil, fmt.Errorf("missing measurement for PCR %d", i)
}
m.ValidationOpt = WarnOnly
out[i] = m
}
}
return out, nil
}