Fix building without cgo

attest/activation.go

@@ -1,4 +1,4 @@
-// +build !cgo
+// +build cgo
 
 package attest
 
@@ -33,21 +33,6 @@ const (
 	tpm20GeneratedMagic = 0xff544347
 )
 
-func cryptoHash(h tpm2.Algorithm) (crypto.Hash, error) {
-	switch h {
-	case tpm2.AlgSHA1:
-		return crypto.SHA1, nil
-	case tpm2.AlgSHA256:
-		return crypto.SHA256, nil
-	case tpm2.AlgSHA384:
-		return crypto.SHA384, nil
-	case tpm2.AlgSHA512:
-		return crypto.SHA512, nil
-	default:
-		return crypto.Hash(0), fmt.Errorf("unsupported signature digest: %v", h)
-	}
-}
-
 // ActivationParameters encapsulates the inputs for activating an AIK.
 type ActivationParameters struct {
 	// TPMVersion holds the version of the TPM, either 1.2 or 2.0.

attest/cryptohash.go

@@ -0,0 +1,22 @@
+package attest
+
+import (
+	"crypto"
+	"fmt"
+	"github.com/google/go-tpm/tpm2"
+)
+
+func cryptoHash(h tpm2.Algorithm) (crypto.Hash, error) {
+	switch h {
+	case tpm2.AlgSHA1:
+		return crypto.SHA1, nil
+	case tpm2.AlgSHA256:
+		return crypto.SHA256, nil
+	case tpm2.AlgSHA384:
+		return crypto.SHA384, nil
+	case tpm2.AlgSHA512:
+		return crypto.SHA512, nil
+	default:
+		return crypto.Hash(0), fmt.Errorf("unsupported signature digest: %v", h)
+	}
+}

attest/key_linux.go

@@ -12,7 +12,7 @@
 // License for the specific language governing permissions and limitations under
 // the License.
 
-// +build linux !cgo
+// +build linux,cgo
 
 package attest
 

attest/tpm_linux.go

@@ -12,7 +12,7 @@
 // License for the specific language governing permissions and limitations under
 // the License.
 
-// +build linux !cgo
+// +build linux,cgo
 
 package attest
 

attest/tpm_other.go

@@ -0,0 +1,62 @@
+// Copyright 2019 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+// +build !linux !windows
+
+package attest
+
+type platformTPM struct {
+	// interf TPMInterface
+}
+
+func probeSystemTPMs() ([]probedTPM, error) {
+	return nil, nil
+}
+
+func openTPM(tpm probedTPM) (*TPM, error) {
+	return nil, nil
+}
+
+func (t *platformTPM) tpmVersion() TPMVersion {
+	return TPMVersionAgnostic
+}
+
+func (t *platformTPM) close() error {
+	return nil
+}
+
+func (t *platformTPM) info() (*TPMInfo, error) {
+	return nil, nil
+}
+
+func (t *platformTPM) loadAIK(opaqueBlob []byte) (*AIK, error) {
+	return nil, nil
+}
+
+func (t *platformTPM) eks() ([]EK, error) {
+	return nil, nil
+}
+
+func (t *platformTPM) newAIK(opts *AIKConfig) (*AIK, error) {
+	return nil, nil
+}
+
+func (t *platformTPM) pcrs(alg HashAlg) ([]PCR, error) {
+	return nil, nil
+}
+
+func (t *platformTPM) measurementLog() ([]byte, error) {
+	return nil, nil
+}
+