hcp: use enum for HCP SBOM upload

Since the protos for uploading an SBOM for a build have been changed to
use an enumeration instead of a plain string with the latest revisions
to the HCP Packer SBOM support feature, we update how we reference those
values for the SBOM format to use that enum instead.

internal/hcp/registry/types.bucket.go

@@ -246,7 +246,7 @@ func (bucket *Bucket) uploadSbom(ctx context.Context, buildName string, sbom pac
 			Body: &hcpPackerModels.HashicorpCloudPacker20230101UploadSbomBody{
 				CompressedSbom: sbom.CompressedData,
 				Name:           sbom.Name,
-				Format:         sbom.Format,
+				Format:         &sbom.Format,
 			},
 		},
 		nil,

packer/build.go

@@ -9,6 +9,7 @@ import (
 	"log"
 	"sync"
 
+	hcpPackerModels "github.com/hashicorp/hcp-sdk-go/clients/cloud-packer-service/stable/2023-01-01/models"
 	"github.com/hashicorp/packer-plugin-sdk/common"
 	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
 	"github.com/hashicorp/packer-plugin-sdk/packerbuilderdata"
@@ -56,7 +57,7 @@ type CoreBuild struct {
 
 type SBOM struct {
 	Name           string
-	Format         string
+	Format         hcpPackerModels.HashicorpCloudPacker20230101SbomFormat
 	CompressedData []byte
 }
 

packer/provisioner.go

@@ -12,6 +12,7 @@ import (
 
 	hcpSbomProvisioner "github.com/hashicorp/packer/provisioner/hcp-sbom"
 
+	hcpPackerModels "github.com/hashicorp/hcp-sdk-go/clients/cloud-packer-service/stable/2023-01-01/models"
 	"github.com/klauspost/compress/zstd"
 
 	"time"
@@ -249,7 +250,7 @@ func (p *DebuggedProvisioner) Provision(ctx context.Context, ui packersdk.Ui, co
 type SBOMInternalProvisioner struct {
 	Provisioner    packersdk.Provisioner
 	CompressedData []byte
-	SBOMFormat     string
+	SBOMFormat     hcpPackerModels.HashicorpCloudPacker20230101SbomFormat
 	SBOMName       string
 }
 

provisioner/hcp-sbom/provisioner.go

@@ -20,6 +20,7 @@ import (
 	"path/filepath"
 
 	"github.com/hashicorp/hcl/v2/hcldec"
+	hcpPackerModels "github.com/hashicorp/hcp-sdk-go/clients/cloud-packer-service/stable/2023-01-01/models"
 	"github.com/hashicorp/packer-plugin-sdk/common"
 	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
 	"github.com/hashicorp/packer-plugin-sdk/template/config"
@@ -116,8 +117,8 @@ type PackerSBOM struct {
 	RawSBOM []byte `json:"raw_sbom"`
 	// Format is the format detected by the provisioner
 	//
-	// Supported values: `spdx` or `cyclonedx`
-	Format string `json:"format"`
+	// Supported values: `SPDX` or `CYCLONEDX`
+	Format hcpPackerModels.HashicorpCloudPacker20230101SbomFormat `json:"format"`
 	// Name is the name of the SBOM to be set on HCP Packer
 	//
 	// If unset, HCP Packer will generate one

provisioner/hcp-sbom/validate.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 
 	"github.com/CycloneDX/cyclonedx-go"
+	hcpPackerModels "github.com/hashicorp/hcp-sdk-go/clients/cloud-packer-service/stable/2023-01-01/models"
 	spdxjson "github.com/spdx/tools-golang/json"
 )
 
@@ -61,11 +62,11 @@ func validateSPDX(content []byte) error {
 }
 
 // validateSBOM validates the SBOM file and returns the format of the SBOM.
-func validateSBOM(content []byte) (string, error) {
+func validateSBOM(content []byte) (hcpPackerModels.HashicorpCloudPacker20230101SbomFormat, error) {
 	// Try validating as SPDX
 	spdxErr := validateSPDX(content)
 	if spdxErr == nil {
-		return "spdx", nil
+		return hcpPackerModels.HashicorpCloudPacker20230101SbomFormatSPDX, nil
 	}
 
 	if vErr, ok := spdxErr.(*ValidationError); ok {
@@ -74,7 +75,7 @@ func validateSBOM(content []byte) (string, error) {
 
 	cycloneDxErr := validateCycloneDX(content)
 	if cycloneDxErr == nil {
-		return "cyclonedx", nil
+		return hcpPackerModels.HashicorpCloudPacker20230101SbomFormatCYCLONEDX, nil
 	}
 
 	if vErr, ok := cycloneDxErr.(*ValidationError); ok {