sdk: remove Linux dependencies

internal/atls/issuer/issuer.go → internal/atls/issuer/issuer_linux.go

@@ -1,22 +1,23 @@
+//go:build linux
+
 // Copyright 2024 Edgeless Systems GmbH
 // SPDX-License-Identifier: AGPL-3.0-only
 
 package issuer
 
 import (
-	"context"
-	"encoding/asn1"
 	"fmt"
 	"log/slog"
 
+	"github.com/edgelesssys/contrast/internal/atls"
 	snpissuer "github.com/edgelesssys/contrast/internal/attestation/snp/issuer"
 	tdxissuer "github.com/edgelesssys/contrast/internal/attestation/tdx/issuer"
 	"github.com/edgelesssys/contrast/internal/logger"
 	"github.com/klauspost/cpuid/v2"
 )
 
 // New creates an attestation issuer for the current platform.
-func New(log *slog.Logger) (Issuer, error) {
+func New(log *slog.Logger) (atls.Issuer, error) {
 	cpuid.Detect()
 	switch {
 	case cpuid.CPU.Supports(cpuid.SEV_SNP):
@@ -31,14 +32,3 @@ func New(log *slog.Logger) (Issuer, error) {
 		return nil, fmt.Errorf("unsupported platform: %T", cpuid.CPU)
 	}
 }
-
-// Issuer issues an attestation document.
-type Issuer interface {
-	Getter
-	Issue(ctx context.Context, userData []byte, nonce []byte) (quote []byte, err error)
-}
-
-// Getter returns an ASN.1 Object Identifier.
-type Getter interface {
-	OID() asn1.ObjectIdentifier
-}

internal/atls/issuer/issuer_universal.go

@@ -0,0 +1,17 @@
+//go:build !linux
+
+// Copyright 2024 Edgeless Systems GmbH
+// SPDX-License-Identifier: AGPL-3.0-only
+
+package issuer
+
+import (
+	"log/slog"
+
+	"github.com/edgelesssys/contrast/internal/atls"
+)
+
+// New creates an attestation issuer for the current platform.
+func New(_ *slog.Logger) (atls.Issuer, error) {
+	panic("issuing is only supported on Linux")
+}

internal/attestation/snp/issuer/issuer.go

@@ -1,3 +1,5 @@
+//go:build linux
+
 // Copyright 2024 Edgeless Systems GmbH
 // SPDX-License-Identifier: AGPL-3.0-only