Make sure the computed hash is used.

chrishantha · chrishantha · commit c85a8adf9c1a · 2018-03-22T14:38:39.000+05:30
diff --git a/highcpu/src/main/java/com/github/chrishantha/sample/highcpu/HashingWorker.java b/highcpu/src/main/java/com/github/chrishantha/sample/highcpu/HashingWorker.java
@@ -24,6 +24,8 @@ public class HashingWorker implements Runnable {
     private final String algorithm;
     private final long length;
 
+    private byte[] lastComputedHash;
+
     public HashingWorker(long length, String algorithm) {
         this.length = length;
         this.algorithm = algorithm;
@@ -48,6 +50,11 @@ public void run() {
 
             // Hash
             digest.update(data.getBytes());
+            byte[] computedHash = digest.digest();
+            if (lastComputedHash != null && computedHash.length != lastComputedHash.length) {
+                throw new IllegalStateException("Is the hash computation correct??");
+            }
+            lastComputedHash = computedHash;
         }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -24,6 +24,8 @@ public class HashingWorker implements Runnable {`
`24`	`24`	`private final String algorithm;`
`25`	`25`	`private final long length;`
`26`	`26`
	`27`	`+ private byte[] lastComputedHash;`
	`28`	`+`
`27`	`29`	`public HashingWorker(long length, String algorithm) {`
`28`	`30`	`this.length = length;`
`29`	`31`	`this.algorithm = algorithm;`
`@@ -48,6 +50,11 @@ public void run() {`
`48`	`50`
`49`	`51`	`// Hash`
`50`	`52`	`digest.update(data.getBytes());`
	`53`	`+ byte[] computedHash = digest.digest();`
	`54`	`+ if (lastComputedHash != null && computedHash.length != lastComputedHash.length) {`
	`55`	`+ throw new IllegalStateException("Is the hash computation correct??");`
	`56`	`+ }`
	`57`	`+ lastComputedHash = computedHash;`
`51`	`58`	`}`
`52`	`59`	`}`
`53`	`60`	`}`