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Merge pull request #7628 from Philippus/patch-1 

Drop last 4 bytes of computed SHA-1 hash
This commit is contained in:
Eric Martin 2019-09-05 15:44:26 -05:00 committed by GitHub
parent f87160da11 2747b3b5e4
commit cf2d93b4e7
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 2 deletions
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5
core-java-modules/core-java/src/main/java/com/baeldung/uuid/UUIDGenerator.java
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@ -3,6 +3,7 @@ package com.baeldung.uuid;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.UUID;
public class UUIDGenerator {
@ -65,9 +66,9 @@ public class UUIDGenerator {
try {
md = MessageDigest.getInstance("SHA-1");
} catch (NoSuchAlgorithmException nsae) {
throw new InternalError("MD5 not supported", nsae);
throw new InternalError("SHA-1 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 */