Drop last 4 bytes of computed SHA-1 hash

Philippus · web-flow · commit 72a108f96089 · 2019-08-23T00:23:46.000+02:00
diff --git a/core-java-modules/core-java/src/main/java/com/baeldung/uuid/UUIDGenerator.java b/core-java-modules/core-java/src/main/java/com/baeldung/uuid/UUIDGenerator.java
@@ -67,7 +67,7 @@ public static UUID type5UUIDFromBytes(byte[] name) {
         } catch (NoSuchAlgorithmException nsae) {
             throw new InternalError("MD5 not supported", nsae);
         }
-        byte[] bytes = md.digest(name);
+        byte[] bytes = Arrays.copyOfRange(md.digest(name), 0, 16);
         bytes[6] &= 0x0f; /* clear version        */
         bytes[6] |= 0x50; /* set to version 5     */
         bytes[8] &= 0x3f; /* clear variant        */

Original file line number	Diff line number	Diff line change
`@@ -67,7 +67,7 @@ public static UUID type5UUIDFromBytes(byte[] name) {`
`67`	`67`	`} catch (NoSuchAlgorithmException nsae) {`
`68`	`68`	`throw new InternalError("MD5 not supported", nsae);`
`69`	`69`	`}`
`70`		`- byte[] bytes = md.digest(name);`
	`70`	`+ byte[] bytes = Arrays.copyOfRange(md.digest(name), 0, 16);`
`71`	`71`	`bytes[6] &= 0x0f; /* clear version */`
`72`	`72`	`bytes[6] \|= 0x50; /* set to version 5 */`
`73`	`73`	`bytes[8] &= 0x3f; /* clear variant */`