working commit

app/operator/imgaux.go

@@ -6,6 +6,20 @@ import (
 )
 
 const sha256prefix = "sha256:"
+const sha512prefix = "sha512:"
+
+func normalizeSHADigest(digest string) string {
+	if stringLikeSHA256Digest(digest) && !strings.HasPrefix(digest, sha256prefix) {
+		digest = sha256prefix + digest
+	} else if stringLikeSHA512Digest(digest) && !strings.HasPrefix(digest, sha512prefix) {
+		digest = sha512prefix + digest
+	}
+	return digest
+}
+
+func stringLikeSHADigest(some string) bool {
+	return stringLikeSHA256Digest(some) || stringLikeSHA512Digest(some)
+}
 
 func stringLikeSHA256Digest(some string) bool {
 	if strings.HasPrefix(some, sha256prefix) {
@@ -20,3 +34,17 @@ func stringLikeSHA256Digest(some string) bool {
 	}
 	return false
 }
+
+func stringLikeSHA512Digest(some string) bool {
+	if strings.HasPrefix(some, sha512prefix) {
+		some = strings.TrimPrefix(some, sha512prefix)
+	}
+	_, err := hex.DecodeString(some)
+	if err != nil {
+		return false
+	}
+	if len(some) == 128 {
+		return true
+	}
+	return false
+}