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AB#2379: Validate version in SNP report (#80)

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* AB#2379: Validate version in SNP report

* Check that TCB version in VCEK matches COMMITTED_TCB
* Check that LAUNCH, CURRENT and REPORTED TCB are at least
at the same security level as we are currently.
* Rename variables in snpReport struct
* Use default values in validator_test.go

Signed-off-by: Otto Bittner <cobittner@posteo.net>
This commit is contained in:
Otto Bittner 2022-09-07 10:39:38 +02:00 committed by GitHub
parent 9d264604c0
commit 23bf4aa665
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 314 additions and 111 deletions
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75
internal/attestation/azure/snp/errors.go Normal file
View File

@ -0,0 +1,75 @@
/*
Copyright (c) Edgeless Systems GmbH
SPDX-License-Identifier: AGPL-3.0-only
*/
package snp
import (
"errors"
"fmt"
)
type signatureError struct {
innerError error
}
func (e *signatureError) Unwrap() error {
return e.innerError
}
func (e *signatureError) Error() string {
return fmt.Sprintf("signature validation failed: %v", e.innerError)
}
type askError struct {
innerError error
}
func (e *askError) Unwrap() error {
return e.innerError
}
func (e *askError) Error() string {
return fmt.Sprintf("validating ASK: %v", e.innerError)
}
type vcekError struct {
innerError error
}
func (e *vcekError) Unwrap() error {
return e.innerError
}
func (e *vcekError) Error() string {
return fmt.Sprintf("validating VCEK: %v", e.innerError)
}
type idKeyError struct {
expectedValue []byte
}
func (e *idKeyError) Unwrap() error {
return nil
}
func (e *idKeyError) Error() string {
return fmt.Sprintf("configured idkeydigest does not match reported idkeydigest: %x", e.expectedValue)
}
type versionError struct {
expectedType string
excpectedVersion tcbVersion
}
func (e *versionError) Unwrap() error {
return nil
}
func (e *versionError) Error() string {
return fmt.Sprintf("invalid %s version: %x", e.expectedType, e.excpectedVersion)
}
var errDebugEnabled = errors.New("SNP report indicates debugging, expected no debugging")

2
internal/attestation/azure/snp/issuer.go
View File

@ -45,7 +45,7 @@ func GetIdKeyDigest(open vtpm.TPMOpenFunc) ([]byte, error) {
return nil, fmt.Errorf("creating snp report: %w", err)
}
return report.IdKeyDigest[:], nil
return report.IDKeyDigest[:], nil
}
// Issuer for Azure TPM attestation.

222
internal/attestation/azure/snp/validator.go
View File

@ -25,8 +25,14 @@ import (
"github.com/google/go-tpm/tpm2"
)
// AMD root key. Received from the AMD Key Distribution System API (KDS).
const arkPEM = "-----BEGIN CERTIFICATE-----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\nAFZEAwoKCQ==\n-----END CERTIFICATE-----\n"
const (
// AMD root key. Received from the AMD Key Distribution System API (KDS).
arkPEM = "-----BEGIN CERTIFICATE-----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\nAFZEAwoKCQ==\n-----END CERTIFICATE-----\n"
bootloaderVersion = 2
teeVersion = 0
snpVersion = 6
microcodeVersion = 93
)
// Validator for Azure confidential VM attestation.
type Validator struct {
@ -35,12 +41,12 @@ type Validator struct {
}
// NewValidator initializes a new Azure validator with the provided PCR values.
func NewValidator(pcrs map[uint32][]byte, enforcedPCRs []uint32, idkeydigest []byte, enforceIdKeyDigest bool, log vtpm.WarnLogger) *Validator {
func NewValidator(pcrs map[uint32][]byte, enforcedPCRs []uint32, idKeyDigest []byte, enforceIDKeyDigest bool, log vtpm.WarnLogger) *Validator {
return &Validator{
Validator: vtpm.NewValidator(
pcrs,
enforcedPCRs,
getTrustedKey(&azureInstanceInfo{}, idkeydigest, enforceIdKeyDigest, log),
getTrustedKey(&azureInstanceInfo{}, idKeyDigest, enforceIDKeyDigest, log),
validateCVM,
vtpm.VerifyPKCS1v15,
log,
@ -70,7 +76,7 @@ func reverseEndian(b []byte) {
// getTrustedKey establishes trust in the given public key.
// It does so by verifying the SNP attestation statement in instanceInfo.
func getTrustedKey(hclAk HCLAkValidator, idkeydigest []byte, enforceIdKeyDigest bool, log vtpm.WarnLogger) func(akPub, instanceInfoRaw []byte) (crypto.PublicKey, error) {
func getTrustedKey(hclAk HCLAkValidator, idKeyDigest []byte, enforceIDKeyDigest bool, log vtpm.WarnLogger) func(akPub, instanceInfoRaw []byte) (crypto.PublicKey, error) {
return func(akPub, instanceInfoRaw []byte) (crypto.PublicKey, error) {
var instanceInfo azureInstanceInfo
if err := json.Unmarshal(instanceInfoRaw, &instanceInfo); err != nil {
@ -87,7 +93,7 @@ func getTrustedKey(hclAk HCLAkValidator, idkeydigest []byte, enforceIdKeyDigest
return nil, fmt.Errorf("validating VCEK: %w", err)
}
if err = validateSNPReport(vcek, idkeydigest, enforceIdKeyDigest, report, log); err != nil {
if err = validateSNPReport(vcek, idKeyDigest, enforceIDKeyDigest, report, log); err != nil {
return nil, fmt.Errorf("validating SNP report: %w", err)
}
@ -134,7 +140,25 @@ func validateVCEK(vcekRaw []byte, certChain []byte) (*x509.Certificate, error) {
return vcek, nil
}
func validateSNPReport(cert *x509.Certificate, expectedIdKeyDigest []byte, enforceIdKeyDigest bool, report snpAttestationReport, log vtpm.WarnLogger) error {
func validateSNPReport(cert *x509.Certificate, expectedIDKeyDigest []byte, enforceIDKeyDigest bool, report snpAttestationReport, log vtpm.WarnLogger) error {
if report.Policy.Debug() {
return errDebugEnabled
}
if !report.CommittedTCB.isVersion(bootloaderVersion, teeVersion, snpVersion, microcodeVersion) {
return &versionError{"COMMITTED_TCB", report.CommittedTCB}
}
if report.LaunchTCB != report.CommittedTCB {
return &versionError{"LAUNCH_TCB", report.LaunchTCB}
}
if !report.CommittedTCB.supersededBy(report.CurrentTCB) {
return &versionError{"CURRENT_TCB", report.CurrentTCB}
}
if err := validateVCEKExtensions(cert, report); err != nil {
return fmt.Errorf("mismatching vcek extensions: %w", err)
}
sig_r := report.Signature.R[:]
sig_s := report.Signature.S[:]
@ -160,12 +184,67 @@ func validateSNPReport(cert *x509.Certificate, expectedIdKeyDigest []byte, enfor
return &signatureError{err}
}
if !bytes.Equal(expectedIdKeyDigest, report.IdKeyDigest[:]) {
if enforceIdKeyDigest {
return &idkeyError{report.IdKeyDigest[:]}
if !bytes.Equal(expectedIDKeyDigest, report.IDKeyDigest[:]) {
if enforceIDKeyDigest {
return &idKeyError{report.IDKeyDigest[:]}
}
if log != nil {
log.Warnf("Encountered different than configured idkeydigest value: %x", report.IdKeyDigest[:])
log.Warnf("Encountered different than configured IDKeyDigest value: %x", report.IDKeyDigest[:])
}
}
return nil
}
// validateVCEKExtensions checks that the certificate extension values in cert match the values described in report.
func validateVCEKExtensions(cert *x509.Certificate, report snpAttestationReport) error {
var certVersion int
for _, extension := range cert.Extensions {
switch extension.Id.String() {
// check bootloader version
case "1.3.6.1.4.1.3704.1.3.1":
{
_, err := asn1.Unmarshal(extension.Value, &certVersion)
if err != nil {
return fmt.Errorf("unmarshalling bootloader version: %w", err)
}
if certVersion != int(report.CommittedTCB.Bootloader) {
return fmt.Errorf("bootloader version %d from report does not match VCEK version %d", int(report.CommittedTCB.Bootloader), certVersion)
}
}
// check TEE version
case "1.3.6.1.4.1.3704.1.3.2":
{
_, err := asn1.Unmarshal(extension.Value, &certVersion)
if err != nil {
return fmt.Errorf("unmarshalling tee version: %w", err)
}
if certVersion != int(report.CommittedTCB.TEE) {
return fmt.Errorf("bootloader version %d from report does not match VCEK version %d", int(report.CommittedTCB.TEE), certVersion)
}
}
// check SNP Firmware version
case "1.3.6.1.4.1.3704.1.3.3":
{
_, err := asn1.Unmarshal(extension.Value, &certVersion)
if err != nil {
return fmt.Errorf("unmarshalling snp version: %w", err)
}
if certVersion != int(report.CommittedTCB.SNP) {
return fmt.Errorf("bootloader version %d from report does not match VCEK version %d", int(report.CommittedTCB.SNP), certVersion)
}
}
// check microcode version
case "1.3.6.1.4.1.3704.1.3.8":
{
_, err := asn1.Unmarshal(extension.Value, &certVersion)
if err != nil {
return fmt.Errorf("unmarshalling microcode version: %w", err)
}
if certVersion != int(report.CommittedTCB.Microcode) {
return fmt.Errorf("bootloader version %d from report does not match VCEK version %d", int(report.CommittedTCB.Microcode), certVersion)
}
}
}
}
@ -228,52 +307,73 @@ type HCLAkValidator interface {
validateAk(runtimeDataRaw []byte, reportData []byte, rsaParameters *tpm2.RSAParams) error
}
type signatureError struct {
innerError error
// Reference: https://github.com/AMDESE/sev-guest/blob/main/include/attestation.h
type snpAttestationReport struct {
Version uint32 // 0x000
GuestSVN uint32 // 0x004
Policy guestPolicy // 0x008
FamilyID [16]byte // 0x010
ImageID [16]byte // 0x020
VMPL uint32 // 0x030
SignatureAlgo uint32 // 0x034
CurrentTCB tcbVersion // 0x038
PlatformInfo uint64 // 0x040
Flags uint32 // 0x048
Reserved0 uint32 // 0x04C
ReportData [64]byte // 0x050
Measurement [48]byte // 0x090
HostData [32]byte // 0x0C0
IDKeyDigest [48]byte // 0x0E0
AuthorKeyDigest [48]byte // 0x110
ReportID [32]byte // 0x140
ReportIDMa [32]byte // 0x160
ReportedTCB tcbVersion // 0x180
_ [24]byte // 0x188
ChipID [64]byte // 0x1A0
CommittedTCB tcbVersion // 0x1E0
CurrentBuild byte // 0x1E8
CurrentMinor byte // 0x1E9
CurrentMajor byte // 0x1EA
_ byte // 0x1EB
CommittedBuild byte // 0x1EC
CommittedMinor byte // 0x1ED
CommittedMajor byte // 0x1EE
_ byte // 0x1EF
LaunchTCB tcbVersion // 0x1F0
_ [168]byte // 0x1F8
Signature snpSignature // 0x2A0
}
func (e *signatureError) Unwrap() error {
return e.innerError
type guestPolicy struct {
AbiMinor uint8 // 0x0
AbiMajor uint8 // 0x8
ContainerValue byte // 0x10 - encodes the following four values:
// Smt bool // 0x10 - bit 0 in 'ContainerValue'.
// _ bool // 0x11 - bit 1 in 'ContainerValue'.
// MigrateMa bool // 0x12 - bit 2 in 'ContainerValue'.
// Debug bool // 0x13 - bit 3 in 'ContainerValue'.
// SingleSocket bool // 0x14 - bit 4 in 'ContainerValue'.
_ [5]byte // 0x15
}
func (e *signatureError) Error() string {
return fmt.Sprintf("signature validation failed: %v", e.innerError)
func (g *guestPolicy) Debug() bool {
return (g.ContainerValue & 0b00001000) != 0
}
type askError struct {
innerError error
type tcbVersion struct {
Bootloader uint8 // 0x0
TEE uint8 // 0x10
_ [4]byte // 0x2F
SNP uint8 // 0x37
Microcode uint8 // 0x3F
}
func (e *askError) Unwrap() error {
return e.innerError
func (t *tcbVersion) isVersion(expectedBootloader, expectedTEE, expectedSNP, expectedMicrocode uint8) bool {
return t.Bootloader >= expectedBootloader && t.TEE >= expectedTEE && t.SNP >= expectedSNP && t.Microcode >= expectedMicrocode
}
func (e *askError) Error() string {
return fmt.Sprintf("validating ASK: %v", e.innerError)
}
type vcekError struct {
innerError error
}
func (e *vcekError) Unwrap() error {
return e.innerError
}
func (e *vcekError) Error() string {
return fmt.Sprintf("validating VCEK: %v", e.innerError)
}
type idkeyError struct {
expectedValue []byte
}
func (e *idkeyError) Unwrap() error {
return nil
}
func (e *idkeyError) Error() string {
return fmt.Sprintf("configured idkeydigest does not match reported idkeydigest: %x", e.expectedValue)
func (t *tcbVersion) supersededBy(new tcbVersion) bool {
return new.Bootloader >= t.Bootloader && new.TEE >= t.TEE && new.SNP >= t.SNP && new.Microcode >= t.Microcode
}
type snpSignature struct {
@ -281,34 +381,6 @@ type snpSignature struct {
S [72]byte
Reserved [512 - 144]byte
}
// Reference: https://github.com/AMDESE/sev-guest/blob/main/include/attestation.h
type snpAttestationReport struct {
Version uint32 /* 0x000 */
GuestSvn uint32 /* 0x004 */
Policy uint64 /* 0x008 */
FamilyId [16]byte /* 0x010 */
ImageId [16]byte /* 0x020 */
Vmpl uint32 /* 0x030 */
SignatureAlgo uint32 /* 0x034 */
PlatformVersion uint64 /* 0x038 */
PlatformInfo uint64 /* 0x040 */
Flags uint32 /* 0x048 */
Reserved0 uint32 /* 0x04C */
ReportData [64]byte /* 0x050 */
Measurement [48]byte /* 0x090 */
HostData [32]byte /* 0x0C0 */
IdKeyDigest [48]byte /* 0x0E0 */
AuthorKeyDigest [48]byte /* 0x110 */
ReportId [32]byte /* 0x140 */
ReportIdMa [32]byte /* 0x160 */
ReportedTcb uint64 /* 0x180 */
Reserved1 [24]byte /* 0x188 */
ChipId [64]byte /* 0x1A0 */
Reserved2 [192]byte /* 0x1E0 */
Signature snpSignature /* 0x2A0 */
}
type ecdsaSig struct {
R, S *big.Int
}

126
internal/attestation/azure/snp/validator_test.go
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