/*
* JBoss, Home of Professional Open Source.
* Copyright 2015 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.wildfly.security.util;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import org.wildfly.security.util.Alphabet.Base32Alphabet;
/**
* Tests for Base32 encoding and decoding.
*
* @author <a href="mailto:fjuma@redhat.com">Farah Juma</a>
*/
public class Base32Test {
@Test
public void testEncodeEmpty() {
// With the padding characters included
CodePointIterator ci = CodePointIterator.ofString("").asLatin1().base32Encode();
String encoded = ci.drainToString();
assertEquals("", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
// Without the padding characters
ci = CodePointIterator.ofString("").asLatin1().base32Encode(Base32Alphabet.STANDARD, false);
encoded = ci.drainToString();
assertEquals("", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
}
@Test
public void testEncode6Padding() {
// With the padding characters included
CodePointIterator ci = CodePointIterator.ofString("f").asLatin1().base32Encode();
String encoded = ci.drainToString();
assertEquals("MY======", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
// Without the padding characters
ci = CodePointIterator.ofString("f").asLatin1().base32Encode(Base32Alphabet.STANDARD, false);
encoded = ci.drainToString();
assertEquals("MY", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
}
@Test
public void testEncode4Padding() {
// With the padding characters included
CodePointIterator ci = CodePointIterator.ofString("fo").asLatin1().base32Encode();
String encoded = ci.drainToString();
assertEquals("MZXQ====", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
// Without the padding characters
ci = CodePointIterator.ofString("fo").asLatin1().base32Encode(Base32Alphabet.STANDARD, false);
encoded = ci.drainToString();
assertEquals("MZXQ", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
}
@Test
public void testEncode3Padding() {
// With the padding characters included
CodePointIterator ci = CodePointIterator.ofString("foo").asLatin1().base32Encode();
String encoded = ci.drainToString();
assertEquals("MZXW6===", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
// Without the padding characters
ci = CodePointIterator.ofString("foo").asLatin1().base32Encode(Base32Alphabet.STANDARD, false);
encoded = ci.drainToString();
assertEquals("MZXW6", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
}
@Test
public void testEncode1Padding() {
// With the padding characters included
CodePointIterator ci = CodePointIterator.ofString("foob").asLatin1().base32Encode();
String encoded = ci.drainToString();
assertEquals("MZXW6YQ=", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
// Without the padding characters
ci = CodePointIterator.ofString("foob").asLatin1().base32Encode(Base32Alphabet.STANDARD, false);
encoded = ci.drainToString();
assertEquals("MZXW6YQ", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
}
@Test
public void testEncodeNoPadding() {
// With the padding characters included
CodePointIterator ci = CodePointIterator.ofString("fooba").asLatin1().base32Encode();
String encoded = ci.drainToString();
assertEquals("MZXW6YTB", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
// Without the padding characters
ci = CodePointIterator.ofString("fooba").asLatin1().base32Encode(Base32Alphabet.STANDARD, false);
encoded = ci.drainToString();
assertEquals("MZXW6YTB", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
}
@Test
public void testEncodeMoreThan5Characters() {
// With the padding characters included
CodePointIterator ci = CodePointIterator.ofString("foobarfoobarfoobar").asLatin1().base32Encode();
String encoded = ci.drainToString();
assertEquals("MZXW6YTBOJTG633CMFZGM33PMJQXE===", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
// Without the padding characters
ci = CodePointIterator.ofString("foobarfoobarfoobar").asLatin1().base32Encode(Base32Alphabet.STANDARD, false);
encoded = ci.drainToString();
assertEquals("MZXW6YTBOJTG633CMFZGM33PMJQXE", encoded);
verifyBackwardIterationOfEncodedCharacters(ci, encoded);
}
private void verifyBackwardIterationOfEncodedCharacters(CodePointIterator ci, String encoded) {
int encodedSize = encoded.length();
for (int i = encodedSize - 1; i >= 0; i--) {
assertTrue(ci.hasPrev());
assertEquals(encoded.charAt(i), ci.prev());
}
}
@Test
public void testDecodeEmpty() throws Exception {
// With the padding characters included
ByteIterator bi = CodePointIterator.ofString("").base32Decode();
String decoded = bi.asUtf8String().drainToString();
assertEquals("", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
// Without the padding characters
bi = CodePointIterator.ofString("").base32Decode(Base32Alphabet.STANDARD, false);
decoded = bi.asUtf8String().drainToString();
assertEquals("", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
}
@Test
public void testDecode6Padding() throws Exception {
// With the padding characters included
ByteIterator bi = CodePointIterator.ofString("MY======").base32Decode();
String decoded = bi.asUtf8String().drainToString();
assertEquals("f", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
// Without the padding characters
bi = CodePointIterator.ofString("MY").base32Decode(Base32Alphabet.STANDARD, false);
decoded = bi.asUtf8String().drainToString();
assertEquals("f", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
}
@Test
public void testDecode4Padding() throws Exception {
// With the padding characters included
ByteIterator bi = CodePointIterator.ofString("MZXQ====").base32Decode();
String decoded = bi.asUtf8String().drainToString();
assertEquals("fo", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
// Without the padding characters
bi = CodePointIterator.ofString("MZXQ").base32Decode(Base32Alphabet.STANDARD, false);
decoded = bi.asUtf8String().drainToString();
assertEquals("fo", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
}
@Test
public void testDecode3Padding() throws Exception {
// With the padding characters included
ByteIterator bi = CodePointIterator.ofString("MZXW6===").base32Decode();
String decoded = bi.asUtf8String().drainToString();
assertEquals("foo", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
// Without the padding characters
bi = CodePointIterator.ofString("MZXW6").base32Decode(Base32Alphabet.STANDARD, false);
decoded = bi.asUtf8String().drainToString();
assertEquals("foo", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
}
@Test
public void testDecode1Padding() throws Exception {
// With the padding characters included
ByteIterator bi = CodePointIterator.ofString("MZXW6YQ=").base32Decode();
String decoded = bi.asUtf8String().drainToString();
assertEquals("foob", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
// Without the padding characters
bi = CodePointIterator.ofString("MZXW6YQ").base32Decode(Base32Alphabet.STANDARD, false);
decoded = bi.asUtf8String().drainToString();
assertEquals("foob", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
}
@Test
public void testDecodeNoPadding() throws Exception {
// With the padding characters included
ByteIterator bi = CodePointIterator.ofString("MZXW6YTB").base32Decode();
String decoded = bi.asUtf8String().drainToString();
assertEquals("fooba", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
// Without the padding characters
bi = CodePointIterator.ofString("MZXW6YTB").base32Decode(Base32Alphabet.STANDARD, false);
decoded = bi.asUtf8String().drainToString();
assertEquals("fooba", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
}
@Test
public void testDecodeMoreThan5Characters() throws Exception {
// With the padding characters included
ByteIterator bi = CodePointIterator.ofString("MZXW6YTBOJTG633CMFZGM33PMJQXE===").base32Decode();
String decoded = bi.asUtf8String().drainToString();
assertEquals("foobarfoobarfoobar", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
// Without the padding characters
bi = CodePointIterator.ofString("MZXW6YTBOJTG633CMFZGM33PMJQXE").base32Decode(Base32Alphabet.STANDARD, false);
decoded = bi.asUtf8String().drainToString();
assertEquals("foobarfoobarfoobar", decoded);
verifyBackwardIterationOfDecodedBytes(bi, decoded);
}
@Test(expected=DecodeException.class)
public void testDecodeInvalidCharacter() throws Exception {
CodePointIterator.ofString("MZXW6YTBOá").base32Decode().drain();
}
@Test(expected=DecodeException.class)
public void testDecodeInvalidPadding() throws Exception {
CodePointIterator.ofString("M====").base32Decode().drain();
}
private void verifyBackwardIterationOfDecodedBytes(ByteIterator bi, String decoded) {
int decodedSize = decoded.length();
for (int i = decodedSize - 1; i >= 0; i--) {
assertTrue(bi.hasPrev());
assertEquals(decoded.charAt(i), bi.prev());
}
}
}