constellation/measurement-reader/cmd/main.go

54 lines
1.7 KiB
Go

/*
Copyright (c) Edgeless Systems GmbH
SPDX-License-Identifier: AGPL-3.0-only
*/
package main
import (
"fmt"
"os"
"github.com/edgelesssys/constellation/v2/internal/constants"
"github.com/edgelesssys/constellation/v2/internal/logger"
"github.com/edgelesssys/constellation/v2/internal/variant"
"github.com/edgelesssys/constellation/v2/measurement-reader/internal/sorted"
"github.com/edgelesssys/constellation/v2/measurement-reader/internal/tdx"
"github.com/edgelesssys/constellation/v2/measurement-reader/internal/tpm"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
func main() {
log := logger.New(logger.JSONLog, zapcore.InfoLevel)
variantString := os.Getenv(constants.AttestationVariant)
attestationVariant, err := variant.FromString(variantString)
if err != nil {
log.With(zap.Error(err)).Fatalf("Failed to parse attestation variant")
}
var m []sorted.Measurement
switch attestationVariant {
case variant.AWSNitroTPM{}, variant.AzureSEVSNP{}, variant.AzureTrustedLaunch{}, variant.GCPSEVES{}, variant.QEMUVTPM{}:
m, err = tpm.Measurements()
if err != nil {
log.With(zap.Error(err)).Fatalf("Failed to read TPM measurements")
}
case variant.QEMUTDX{}:
m, err = tdx.Measurements()
if err != nil {
log.With(zap.Error(err)).Fatalf("Failed to read Intel TDX measurements")
}
default:
log.With(zap.String("attestationVariant", variantString)).Fatalf("Unsupported attestation variant")
}
fmt.Println("Measurements:")
for _, measurement := range m {
// -7 should ensure consistent padding across all current prefixes: PCR[xx], MRTD, RTMR[x].
// If the prefix gets longer somewhen in the future, this might need adjustment for consistent padding.
fmt.Printf("\t%-7s : 0x%0X\n", measurement.Index, measurement.Value)
}
}