Merge pull request #834 from sameira/master

Adding SHA-256 hashing impl and test classes
This commit is contained in:
Grzegorz Piwowarek 2016-11-14 21:54:08 +01:00 committed by GitHub
commit dbe099fab3
3 changed files with 93 additions and 0 deletions

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@ -46,6 +46,11 @@
<version>3.3</version>
</dependency>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.55</version>
</dependency>
<!-- web -->
<!-- marshalling -->

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@ -0,0 +1,51 @@
package com.baeldung.hashing;
import com.google.common.hash.Hashing;
import org.apache.commons.codec.digest.DigestUtils;
import org.bouncycastle.util.encoders.Hex;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class SHA256Hashing {
public static String HashWithJavaMessageDigest(final String originalString)
throws NoSuchAlgorithmException {
final MessageDigest digest = MessageDigest.getInstance("SHA-256");
final byte[] encodedhash = digest.digest(
originalString.getBytes(StandardCharsets.UTF_8));
return bytesToHex(encodedhash);
}
public static String HashWithGuava(final String originalString) {
final String sha256hex = Hashing.sha256().hashString(
originalString, StandardCharsets.UTF_8).toString();
return sha256hex;
}
public static String HashWithApacheCommons(final String originalString) {
final String sha256hex = DigestUtils.sha256Hex(originalString);
return sha256hex;
}
public static String HashWithBouncyCastle(final String originalString)
throws NoSuchAlgorithmException {
final MessageDigest digest = MessageDigest.getInstance("SHA-256");
final byte[] hash = digest.digest(
originalString.getBytes(StandardCharsets.UTF_8));
final String sha256hex = new String(Hex.encode(hash));
return sha256hex;
}
private static String bytesToHex(byte[] hash) {
StringBuffer hexString = new StringBuffer();
for (int i = 0; i < hash.length; i++) {
String hex = Integer.toHexString(0xff & hash[i]);
if(hex.length() == 1) hexString.append('0');
hexString.append(hex);
}
return hexString.toString();
}
}

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@ -0,0 +1,37 @@
package com.baeldung.hashing;
import org.junit.Test;
import static org.junit.Assert.*;
public class SHA256HashingTest {
private static String originalValue = "abc123";
private static String hashedValue =
"6ca13d52ca70c883e0f0bb101e425a89e8624de51db2d2392593af6a84118090";
@Test
public void testHashWithJavaMessageDigest() throws Exception {
final String currentHashedValue = SHA256Hashing.HashWithJavaMessageDigest(originalValue);
assertEquals(currentHashedValue, hashedValue);
}
@Test
public void testHashWithGuava() throws Exception {
final String currentHashedValue = SHA256Hashing.HashWithApacheCommons(originalValue);
assertEquals(currentHashedValue, hashedValue);
}
@Test
public void testHashWithApacheCommans() throws Exception {
final String currentHashedValue = SHA256Hashing.HashWithGuava(originalValue);
assertEquals(currentHashedValue, hashedValue);
}
@Test
public void testHashWithBouncyCastle() throws Exception {
final String currentHashedValue = SHA256Hashing.HashWithBouncyCastle(originalValue);
assertEquals(currentHashedValue, hashedValue);
}
}