Remove certificate-transparency-go dependancy

Signed-off-by: Joe Richey <joerichey@google.com>

attest/application_key_test.go

@@ -28,11 +28,10 @@ import (
 	"crypto/elliptic"
 	"crypto/rand"
 	"crypto/rsa"
+	"crypto/x509"
 	"encoding/asn1"
 	"math/big"
 	"testing"
-
-	"github.com/google/certificate-transparency-go/x509"
 )
 
 func TestSimTPM20KeyCreateAndLoad(t *testing.T) {

attest/attest-tool/attest-tool.go

@@ -6,6 +6,7 @@ import (
 	"crypto/ecdsa"
 	"crypto/rand"
 	"crypto/rsa"
+	"crypto/x509"
 	"encoding/hex"
 	"encoding/json"
 	"encoding/pem"
@@ -15,7 +16,6 @@ import (
 	"io/ioutil"
 	"os"
 
-	"github.com/google/certificate-transparency-go/x509"
 	"github.com/google/go-attestation/attest"
 	"github.com/google/go-attestation/attest/attest-tool/internal"
 )

attest/attest.go

@@ -17,12 +17,12 @@ package attest
 
 import (
 	"crypto"
+	"crypto/x509"
 	"errors"
 	"fmt"
 	"io"
 	"strings"
 
-	"github.com/google/certificate-transparency-go/x509"
 	"github.com/google/go-tpm/tpm"
 	"github.com/google/go-tpm/tpm2"
 )

attest/challenge_test.go

@@ -4,9 +4,8 @@ import (
 	"bytes"
 	"crypto/rand"
 	"crypto/rsa"
+	"crypto/x509"
 	"testing"
-
-	"github.com/google/certificate-transparency-go/x509"
 )
 
 func TestMakeActivationBlob(t *testing.T) {

attest/internal/events.go

@@ -2,14 +2,13 @@ package internal
 
 import (
 	"bytes"
+	"crypto/x509"
+	"encoding/asn1"
 	"encoding/binary"
 	"errors"
 	"fmt"
 	"io"
 	"unicode/utf16"
-
-	"github.com/google/certificate-transparency-go/asn1"
-	"github.com/google/certificate-transparency-go/x509"
 )
 
 const (

attest/pcp_windows.go

@@ -19,14 +19,13 @@ package attest
 
 import (
 	"bytes"
+	"crypto/x509"
 	"encoding/binary"
 	"fmt"
 	"io"
 	"syscall"
 	"unsafe"
 
-	"github.com/google/certificate-transparency-go/x509"
-
 	"github.com/google/go-tpm/tpmutil"
 	tpmtbs "github.com/google/go-tpm/tpmutil/tbs"
 	"golang.org/x/sys/windows"

attest/secureboot.go

@@ -16,10 +16,10 @@ package attest
 
 import (
 	"bytes"
+	"crypto/x509"
 	"errors"
 	"fmt"
 
-	"github.com/google/certificate-transparency-go/x509"
 	"github.com/google/go-attestation/attest/internal"
 )
 

attest/tpm.go

@@ -18,15 +18,14 @@ import (
 	"bytes"
 	"crypto/rsa"
 	"crypto/sha256"
+	"crypto/x509"
+	"encoding/asn1"
 	"encoding/base64"
 	"encoding/binary"
 	"fmt"
 	"io"
 	"strings"
 
-	"github.com/google/certificate-transparency-go/asn1"
-	"github.com/google/certificate-transparency-go/x509"
-
 	"github.com/google/go-tpm/tpm2"
 	"github.com/google/go-tpm/tpmutil"
 )
@@ -199,12 +198,12 @@ func ParseEKCertificate(ekCert []byte) (*x509.Certificate, error) {
 	var cert struct {
 		Raw asn1.RawContent
 	}
-	if _, err := asn1.UnmarshalWithParams(ekCert, &cert, "lax"); err != nil && x509.IsFatal(err) {
+	if _, err := asn1.UnmarshalWithParams(ekCert, &cert, "lax"); err != nil {
 		return nil, fmt.Errorf("asn1.Unmarshal() failed: %v, wasWrapped=%v", err, wasWrapped)
 	}
 
 	c, err := x509.ParseCertificate(cert.Raw)
-	if err != nil && x509.IsFatal(err) {
+	if err != nil {
 		return nil, fmt.Errorf("x509.ParseCertificate() failed: %v", err)
 	}
 	return c, nil

attest/tpm12_linux.go

@@ -19,11 +19,11 @@ package attest
 
 import (
 	"crypto"
+	"crypto/x509"
 	"encoding/binary"
 	"fmt"
 	"io/ioutil"
 
-	"github.com/google/certificate-transparency-go/x509"
 	"github.com/google/go-tspi/attestation"
 	"github.com/google/go-tspi/tspi"
 	"github.com/google/go-tspi/tspiconst"

attest/tpm_test.go

@@ -2,11 +2,10 @@ package attest
 
 import (
 	"crypto/rsa"
+	"crypto/x509"
 	"encoding/pem"
 	"fmt"
 	"testing"
-
-	"github.com/google/certificate-transparency-go/x509"
 )
 
 // Generated using the following command:

attest/wrapped_tpm20.go

@@ -19,12 +19,12 @@ import (
 	"crypto"
 	"crypto/ecdsa"
 	"crypto/rsa"
+	"encoding/asn1"
 	"errors"
 	"fmt"
 	"io"
 	"math/big"
 
-	"github.com/google/certificate-transparency-go/asn1"
 	"github.com/google/go-tpm/tpm2"
 	"github.com/google/go-tpm/tpmutil"
 )

attributecert/attributecert.go

@@ -9,15 +9,15 @@ package attributecert
 import (
 	"bytes"
 	"crypto"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/asn1"
 	"errors"
 	"fmt"
 	"math/big"
 	"time"
 
 	"github.com/google/go-attestation/oid"
-	"github.com/google/certificate-transparency-go/asn1"
-	"github.com/google/certificate-transparency-go/x509/pkix"
-	"github.com/google/certificate-transparency-go/x509"
 )
 
 var (

attributecert/attributecert_test.go

@@ -15,13 +15,12 @@
 package attributecert
 
 import (
+	"crypto/x509"
 	"encoding/json"
 	"io/ioutil"
 	"reflect"
 	"strings"
 	"testing"
-
-	"github.com/google/certificate-transparency-go/x509"
 )
 
 func TestVerifyAttributeCert(t *testing.T) {

go.mod

@@ -3,7 +3,6 @@ module github.com/google/go-attestation
 go 1.16
 
 require (
-	github.com/google/certificate-transparency-go v1.1.1
 	github.com/google/go-cmp v0.5.7
 	github.com/google/go-tpm v0.3.3
 	github.com/google/go-tpm-tools v0.3.1