checksum algo

Author: push2stack

src/main/java/io/github/jpmorganchase/fusion/digest/checksum/CRC32CProvider.java

@@ -1,38 +1,32 @@
 package io.github.jpmorganchase.fusion.digest.checksum;
 
 import java.util.Base64;
-import java.util.zip.Checksum;
 import software.amazon.awssdk.crt.checksums.CRC32C;
 
 public class CRC32CProvider implements DigestProvider {
 
-    private final Checksum checksum;
+    private final CRC32C crc32c;
 
     public CRC32CProvider() {
-        this.checksum = new CRC32C();
+        this.crc32c = new CRC32C();
     }
 
     @Override
     public void update(byte singleByte) {
-        checksum.update(singleByte);
+        crc32c.update(singleByte);
     }
 
     @Override
     public String getDigest() {
-        long checksumValue = checksum.getValue();
-        return Base64.getEncoder().encodeToString(longToBytes(checksumValue));
-    }
+        int value = crc32c.getValue();
 
-    private byte[] longToBytes(long value) {
-        return new byte[] {
-                (byte) (value >>> 56),
-                (byte) (value >>> 48),
-                (byte) (value >>> 40),
-                (byte) (value >>> 32),
+        byte[] bytes = new byte[] {
                 (byte) (value >>> 24),
                 (byte) (value >>> 16),
                 (byte) (value >>> 8),
                 (byte) value
         };
+
+        return Base64.getEncoder().encodeToString(bytes);
     }
 }

src/main/java/io/github/jpmorganchase/fusion/digest/checksum/CRC32Provider.java

@@ -2,37 +2,31 @@
 
 import java.util.Base64;
 import java.util.zip.CRC32;
-import java.util.zip.Checksum;
 
 public class CRC32Provider implements DigestProvider {
 
-    private final Checksum checksum;
+    private final CRC32 crc32;
 
     public CRC32Provider() {
-        this.checksum = new CRC32();
+        this.crc32 = new CRC32();
     }
 
     @Override
     public void update(byte singleByte) {
-        checksum.update(singleByte);
+        crc32.update(singleByte);
     }
 
     @Override
     public String getDigest() {
-        long checksumValue = checksum.getValue();
-        return Base64.getEncoder().encodeToString(longToBytes(checksumValue));
-    }
+        long value = crc32.getValue();
 
-    private byte[] longToBytes(long value) {
-        return new byte[] {
-                (byte) (value >>> 56),
-                (byte) (value >>> 48),
-                (byte) (value >>> 40),
-                (byte) (value >>> 32),
+        byte[] bytes = new byte[] {
                 (byte) (value >>> 24),
                 (byte) (value >>> 16),
                 (byte) (value >>> 8),
                 (byte) value
         };
+
+        return Base64.getEncoder().encodeToString(bytes);
     }
 }