[#12] Extend method logic

Signed-off-by: Ori Bruk <o.bruk@yadro.com>

models/src/main/java/info/frostfs/sdk/dto/CheckSum.java

@@ -0,0 +1,25 @@
+package info.frostfs.sdk.dto;
+
+import info.frostfs.sdk.Helper;
+
+public class CheckSum {
+    // type is always Sha256
+    public byte[] hash;
+
+    public CheckSum(byte[] content) {
+        this.hash = Helper.getSha256(content);
+    }
+
+    public byte[] getHash() {
+        return hash;
+    }
+
+    public void setHash(byte[] hash) {
+        this.hash = hash;
+    }
+
+    @Override
+    public String toString() {
+        return Helper.getHexString(hash);
+    }
+}