Enable versions API to handle TDX versions

Signed-off-by: Daniel Weiße <dw@edgeless.systems>

internal/api/attestationconfigapi/version.go

@@ -0,0 +1,127 @@
+/*
+Copyright (c) Edgeless Systems GmbH
+
+SPDX-License-Identifier: AGPL-3.0-only
+*/
+
+package attestationconfigapi
+
+import (
+	"encoding/json"
+	"fmt"
+	"path"
+	"sort"
+	"strings"
+
+	"github.com/edgelesssys/constellation/v2/internal/attestation/variant"
+)
+
+// AttestationURLPath is the URL path to the attestation versions.
+const AttestationURLPath = "constellation/v1/attestation"
+
+// SEVSNPVersion tracks the latest version of each component for SEV-SNP.
+type SEVSNPVersion struct {
+	// Bootloader is the latest version of the SEV-SNP bootloader.
+	Bootloader uint8 `json:"bootloader,omitempty"`
+	// TEE is the latest version of the SEV-SNP TEE.
+	TEE uint8 `json:"tee,omitempty"`
+	// SNP is the latest version of the SEV-SNP SNP.
+	SNP uint8 `json:"snp,omitempty"`
+	// Microcode is the latest version of the SEV-SNP microcode.
+	Microcode uint8 `json:"microcode,omitempty"`
+}
+
+// TDXVersion tracks the latest version of each component for TDX.
+type TDXVersion struct {
+	// QESVN is the latest QE security version number.
+	QESVN uint16 `json:"qeSVN,omitempty"`
+	// PCESVN is the latest PCE security version number.
+	PCESVN uint16 `json:"pceSVN,omitempty"`
+	// TEETCBSVN are the latest component-wise security version numbers for the TEE.
+	TEETCBSVN [16]byte `json:"teeTCBSVN,omitempty"`
+	// QEVendorID is the latest QE vendor ID.
+	QEVendorID [16]byte `json:"qeVendorID,omitempty"`
+	// XFAM is the latest XFAM field.
+	XFAM [8]byte `json:"xfam,omitempty"`
+}
+
+// VersionAPIEntry is the request to get the version information of the specific version in the config api.
+//
+// TODO: Because variant is not part of the marshalled JSON, fetcher and client methods need to fill the variant property.
+// In API v2 we should embed the variant in the object and remove some code from fetcher & client.
+// That would remove the possibility of some fetcher/client code forgetting to set the variant.
+type VersionAPIEntry struct {
+	Version string          `json:"-"`
+	Variant variant.Variant `json:"-"`
+	SEVSNPVersion
+	TDXVersion
+}
+
+// JSONPath returns the path to the JSON file for the request to the config api.
+func (i VersionAPIEntry) JSONPath() string {
+	return path.Join(AttestationURLPath, i.Variant.String(), i.Version)
+}
+
+// ValidateRequest validates the request.
+func (i VersionAPIEntry) ValidateRequest() error {
+	if !strings.HasSuffix(i.Version, ".json") {
+		return fmt.Errorf("version has no .json suffix")
+	}
+	return nil
+}
+
+// Validate is a No-Op at the moment.
+func (i VersionAPIEntry) Validate() error {
+	return nil
+}
+
+// VersionList is the request to retrieve of all versions in the API for one attestation variant.
+//
+// TODO: Because variant is not part of the marshalled JSON, fetcher and client methods need to fill the variant property.
+// In API v2 we should embed the variant in the object and remove some code from fetcher & client.
+// That would remove the possibility of some fetcher/client code forgetting to set the variant.
+type VersionList struct {
+	Variant variant.Variant
+	List    []string
+}
+
+// MarshalJSON marshals the i's list property to JSON.
+func (i VersionList) MarshalJSON() ([]byte, error) {
+	return json.Marshal(i.List)
+}
+
+// UnmarshalJSON unmarshals a list of strings into i's list property.
+func (i *VersionList) UnmarshalJSON(data []byte) error {
+	return json.Unmarshal(data, &i.List)
+}
+
+// JSONPath returns the path to the JSON file for the request to the config api.
+func (i VersionList) JSONPath() string {
+	return path.Join(AttestationURLPath, i.Variant.String(), "list")
+}
+
+// ValidateRequest is a NoOp as there is no input.
+func (i VersionList) ValidateRequest() error {
+	return nil
+}
+
+// SortReverse sorts the list of versions in reverse order.
+func (i *VersionList) SortReverse() {
+	sort.Sort(sort.Reverse(sort.StringSlice(i.List)))
+}
+
+// AddVersion adds new to i's list and sorts the element in descending order.
+func (i *VersionList) AddVersion(new string) {
+	i.List = append(i.List, new)
+	i.List = variant.RemoveDuplicate(i.List)
+
+	i.SortReverse()
+}
+
+// Validate validates the response.
+func (i VersionList) Validate() error {
+	if len(i.List) < 1 {
+		return fmt.Errorf("no versions found in /list")
+	}
+	return nil
+}