chore: Make the gitbinhash ouput a DigestSet.

Signed-off-by: Matthias Glastra <[email protected]>

attestation/git/git.go

@@ -81,7 +81,7 @@ type Tag struct {
 type Attestor struct {
 	GitTool        string               `json:"gittool"`
 	GitBinPath     string               `json:"gitbinpath,omitempty"`
-	GitBinHash     string               `json:"gitbinhash,omitempty"`
+	GitBinHash     cryptoutil.DigestSet `json:"gitbinhash,omitempty"`
 	CommitHash     string               `json:"commithash"`
 	Author         string               `json:"author"`
 	AuthorEmail    string               `json:"authoremail"`

attestation/git/git_bin.go

@@ -48,24 +48,23 @@ func GitGetBinPath() (string, error) {
 
 // GitGetBinHash retrieves a sha256 hash of the git binary that is located on the system.
 // The path is determined based on exec.LookPath().
-func GitGetBinHash(ctx *attestation.AttestationContext) (string, error) {
+func GitGetBinHash(ctx *attestation.AttestationContext) (cryptoutil.DigestSet, error) {
 	path, err := exec.LookPath("git")
 	if err != nil {
-		return "", err
+		return cryptoutil.DigestSet{}, err
 	}
 
 	gitBinDigest, err := cryptoutil.CalculateDigestSetFromFile(path, ctx.Hashes())
 	fmt.Printf("%s", gitBinDigest)
 	if err != nil {
-		return "", err
+		return cryptoutil.DigestSet{}, err
 	}
 
-	digestMap, err := gitBinDigest.ToNameMap()
 	if err != nil {
-		return "", err
+		return cryptoutil.DigestSet{}, err
 	}
 
-	return fmt.Sprintf("sha256:%s", digestMap["sha256"]), nil
+	return gitBinDigest, nil
 }
 
 // GitGetStatus retrieves the status of staging and worktree