feat: LiteHashDRBG 생성시 상세 지정

2022-03-12 20:31:13 +09:00
parent a2498506c3
commit 7ef9e67f5d
2 changed files with 23 additions and 2 deletions
@@ -21,9 +21,19 @@ class LiteHashDRBG implements RNG

    protected string $buffer;
    protected int $bufferIdx;
-    public function __construct(protected string $seed, protected int $stateIdx = 0)
+    public function __construct(protected string $seed, protected int $stateIdx = 0, int $bufferIdx = 0)
    {
+        if($bufferIdx < 0){
+            throw new \InvalidArgumentException("bufferIdx {$bufferIdx} < 0");
+        }
+        if($bufferIdx >= self::BUFFER_BYTE_SIZE){
+            throw new \InvalidArgumentException("bufferIdx {$bufferIdx} >= ".self::BUFFER_BYTE_SIZE);
+        }
+        if($stateIdx < 0){
+            throw new \InvalidArgumentException("stateIdx {$stateIdx} < 0");
+        }
        $this->genNextBlock();
+        $this->bufferIdx = $bufferIdx;
    }

    protected function genNextBlock(): void