Created
August 4, 2020 22:30
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Go Attestation Example
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package main | |
import ( | |
"fmt" | |
"os" | |
"github.com/google/go-attestation/attest" | |
) | |
func main() { | |
config := &attest.OpenConfig{} | |
tpm, err := attest.OpenTPM(config) | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "Error opening the TPM: %v\n", err) | |
os.Exit(1) | |
} | |
defer tpm.Close() | |
eks, err := tpm.EKs() | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "Error getting EKs from TPM: %v\n", err) | |
os.Exit(1) | |
} | |
fmt.Fprintf(os.Stdout, "There are %d EKs in TPM 2.0 chip\n", len(eks)) | |
ek := eks[0] | |
tpmInfo, err := tpm.Info() | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "Error getting Vendor Name from TPM: %v\n", err) | |
os.Exit(1) | |
} | |
fmt.Fprintf(os.Stdout, "Vendor Name of TPM 2.0 chip : %s\n", tpmInfo.Manufacturer.String()) | |
akConfig := &attest.AKConfig{} | |
ak, err := tpm.NewAK(akConfig) | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "Error generating AK in TPM: %v\n", err) | |
os.Exit(1) | |
} | |
akAttestParams := ak.AttestationParameters() | |
akBytes, err := ak.Marshal() | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "Error marshalling AK: %v\n", err) | |
ak.Close(tpm) | |
os.Exit(1) | |
} | |
ak.Close(tpm) | |
akActivationParams := attest.ActivationParameters{ | |
TPMVersion: attest.TPMVersion20, | |
EK: ek.Public, | |
AK: akAttestParams, | |
} | |
secret, encryptedCredentials, err := akActivationParams.Generate() | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "Error generating Credential Activation Challenge: %v\n", err) | |
os.Exit(1) | |
} | |
fmt.Fprintf(os.Stdout, "Secret = %v\n", secret) | |
ak, err = tpm.LoadAK(akBytes) | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "Error loading AK: %v\n", err) | |
os.Exit(1) | |
} | |
defer ak.Close(tpm) | |
secret, err = ak.ActivateCredential(tpm, *encryptedCredentials) | |
if err != nil { | |
fmt.Fprintf(os.Stderr, "Error activating Credential Activation Challenge: %v\n", err) | |
os.Exit(1) | |
} | |
fmt.Fprintf(os.Stdout, "Secret = %v\n", secret) | |
os.Exit(0) | |
} |
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