working commit

2026-02-26 18:15:10 +02:00
commit 19b173357a
9 changed files with 328 additions and 0 deletions
@@ -0,0 +1,50 @@
+package client
+
+import (
+	"crypto/sha256"
+	"crypto/sha512"
+	"encoding/hex"
+        "strings"
+)
+
+func SHA256Digest(src []byte) string {
+	hasher := sha256.New()
+	hasher.Write(src)
+	sum := hasher.Sum(nil)
+	return "sha256:" + hex.EncodeToString(sum)
+}
+
+func SHA512Digest(src []byte) string {
+	hasher := sha512.New()
+	hasher.Write(src)
+	sum := hasher.Sum(nil)
+	return "sha512:" + hex.EncodeToString(sum)
+}
+
+const (
+        Undefined int = iota
+        SHA256
+        SHA512
+)
+
+
+func DigestType(digest string) int {
+        var err error
+        var typ int
+        digest = strings.ToLower(digest)
+        digest = strings.TrimPrefix(digest, "sha256:")
+        digest = strings.TrimPrefix(digest, "sha512:")
+        decoded, err := hex.DecodeString(digest)
+        if err != nil {
+                        return Undefined
+        }
+        switch (len(decoded)) {
+                case 64:
+                        typ = SHA256
+                case 128:
+                        typ = SHA512
+                default:
+                        typ = Undefined
+        }
+        return typ
+}