Java example source code file (TestBase64.java)
The TestBase64.java Java example source code/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/**
* @test 4235519 8004212 8005394 8007298 8006295 8006315 8006530 8007379 8008925
* 8014217 8025003 8026330 8028397
* @summary tests java.util.Base64
*/
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Base64;
import java.util.Random;
public class TestBase64 {
public static void main(String args[]) throws Throwable {
int numRuns = 10;
int numBytes = 200;
if (args.length > 1) {
numRuns = Integer.parseInt(args[0]);
numBytes = Integer.parseInt(args[1]);
}
test(Base64.getEncoder(), Base64.getDecoder(), numRuns, numBytes);
test(Base64.getUrlEncoder(), Base64.getUrlDecoder(), numRuns, numBytes);
test(Base64.getMimeEncoder(), Base64.getMimeDecoder(), numRuns, numBytes);
Random rnd = new java.util.Random();
byte[] nl_1 = new byte[] {'\n'};
byte[] nl_2 = new byte[] {'\n', '\r'};
byte[] nl_3 = new byte[] {'\n', '\r', '\n'};
for (int i = 0; i < 10; i++) {
int len = rnd.nextInt(200) + 4;
test(Base64.getMimeEncoder(len, nl_1),
Base64.getMimeDecoder(),
numRuns, numBytes);
test(Base64.getMimeEncoder(len, nl_2),
Base64.getMimeDecoder(),
numRuns, numBytes);
test(Base64.getMimeEncoder(len, nl_3),
Base64.getMimeDecoder(),
numRuns, numBytes);
}
testNull(Base64.getEncoder());
testNull(Base64.getUrlEncoder());
testNull(Base64.getMimeEncoder());
testNull(Base64.getMimeEncoder(10, new byte[]{'\n'}));
testNull(Base64.getDecoder());
testNull(Base64.getUrlDecoder());
testNull(Base64.getMimeDecoder());
checkNull(new Runnable() { public void run() { Base64.getMimeEncoder(10, null); }});
testIOE(Base64.getEncoder());
testIOE(Base64.getUrlEncoder());
testIOE(Base64.getMimeEncoder());
testIOE(Base64.getMimeEncoder(10, new byte[]{'\n'}));
byte[] src = new byte[1024];
new Random().nextBytes(src);
final byte[] decoded = Base64.getEncoder().encode(src);
testIOE(Base64.getDecoder(), decoded);
testIOE(Base64.getMimeDecoder(), decoded);
testIOE(Base64.getUrlDecoder(), Base64.getUrlEncoder().encode(src));
// illegal line separator
checkIAE(new Runnable() { public void run() { Base64.getMimeEncoder(10, new byte[]{'\r', 'N'}); }});
// malformed padding/ending
testMalformedPadding();
// illegal base64 character
decoded[2] = (byte)0xe0;
checkIAE(new Runnable() {
public void run() { Base64.getDecoder().decode(decoded); }});
checkIAE(new Runnable() {
public void run() { Base64.getDecoder().decode(decoded, new byte[1024]); }});
checkIAE(new Runnable() { public void run() {
Base64.getDecoder().decode(ByteBuffer.wrap(decoded)); }});
// test single-non-base64 character for mime decoding
testSingleNonBase64MimeDec();
// test decoding of unpadded data
testDecodeUnpadded();
// test mime decoding with ignored character after padding
testDecodeIgnoredAfterPadding();
}
private static sun.misc.BASE64Encoder sunmisc = new sun.misc.BASE64Encoder();
private static void test(Base64.Encoder enc, Base64.Decoder dec,
int numRuns, int numBytes) throws Throwable {
Random rnd = new java.util.Random();
enc.encode(new byte[0]);
dec.decode(new byte[0]);
for (boolean withoutPadding : new boolean[] { false, true}) {
if (withoutPadding) {
enc = enc.withoutPadding();
}
for (int i=0; i<numRuns; i++) {
for (int j=1; j<numBytes; j++) {
byte[] orig = new byte[j];
rnd.nextBytes(orig);
// --------testing encode/decode(byte[])--------
byte[] encoded = enc.encode(orig);
byte[] decoded = dec.decode(encoded);
checkEqual(orig, decoded,
"Base64 array encoding/decoding failed!");
if (withoutPadding) {
if (encoded[encoded.length - 1] == '=')
throw new RuntimeException(
"Base64 enc.encode().withoutPadding() has padding!");
}
// compare to sun.misc.BASE64Encoder
byte[] encoded2 = sunmisc.encode(orig).getBytes("ASCII");
if (!withoutPadding) { // don't test for withoutPadding()
checkEqual(normalize(encoded), normalize(encoded2),
"Base64 enc.encode() does not match sun.misc.base64!");
}
// remove padding '=' to test non-padding decoding case
if (encoded[encoded.length -2] == '=')
encoded2 = Arrays.copyOf(encoded, encoded.length -2);
else if (encoded[encoded.length -1] == '=')
encoded2 = Arrays.copyOf(encoded, encoded.length -1);
else
encoded2 = null;
// --------testing encodetoString(byte[])/decode(String)--------
String str = enc.encodeToString(orig);
if (!Arrays.equals(str.getBytes("ASCII"), encoded)) {
throw new RuntimeException(
"Base64 encodingToString() failed!");
}
byte[] buf = dec.decode(new String(encoded, "ASCII"));
checkEqual(buf, orig, "Base64 decoding(String) failed!");
if (encoded2 != null) {
buf = dec.decode(new String(encoded2, "ASCII"));
checkEqual(buf, orig, "Base64 decoding(String) failed!");
}
//-------- testing encode/decode(Buffer)--------
testEncode(enc, ByteBuffer.wrap(orig), encoded);
ByteBuffer bin = ByteBuffer.allocateDirect(orig.length);
bin.put(orig).flip();
testEncode(enc, bin, encoded);
testDecode(dec, ByteBuffer.wrap(encoded), orig);
bin = ByteBuffer.allocateDirect(encoded.length);
bin.put(encoded).flip();
testDecode(dec, bin, orig);
if (encoded2 != null)
testDecode(dec, ByteBuffer.wrap(encoded2), orig);
// --------testing decode.wrap(input stream)--------
// 1) random buf length
ByteArrayInputStream bais = new ByteArrayInputStream(encoded);
InputStream is = dec.wrap(bais);
buf = new byte[orig.length + 10];
int len = orig.length;
int off = 0;
while (true) {
int n = rnd.nextInt(len);
if (n == 0)
n = 1;
n = is.read(buf, off, n);
if (n == -1) {
checkEqual(off, orig.length,
"Base64 stream decoding failed");
break;
}
off += n;
len -= n;
if (len == 0)
break;
}
buf = Arrays.copyOf(buf, off);
checkEqual(buf, orig, "Base64 stream decoding failed!");
// 2) read one byte each
bais.reset();
is = dec.wrap(bais);
buf = new byte[orig.length + 10];
off = 0;
int b;
while ((b = is.read()) != -1) {
buf[off++] = (byte)b;
}
buf = Arrays.copyOf(buf, off);
checkEqual(buf, orig, "Base64 stream decoding failed!");
// --------testing encode.wrap(output stream)--------
ByteArrayOutputStream baos = new ByteArrayOutputStream((orig.length + 2) / 3 * 4 + 10);
OutputStream os = enc.wrap(baos);
off = 0;
len = orig.length;
for (int k = 0; k < 5; k++) {
if (len == 0)
break;
int n = rnd.nextInt(len);
if (n == 0)
n = 1;
os.write(orig, off, n);
off += n;
len -= n;
}
if (len != 0)
os.write(orig, off, len);
os.close();
buf = baos.toByteArray();
checkEqual(buf, encoded, "Base64 stream encoding failed!");
// 2) write one byte each
baos.reset();
os = enc.wrap(baos);
off = 0;
while (off < orig.length) {
os.write(orig[off++]);
}
os.close();
buf = baos.toByteArray();
checkEqual(buf, encoded, "Base64 stream encoding failed!");
// --------testing encode(in, out); -> bigger buf--------
buf = new byte[encoded.length + rnd.nextInt(100)];
int ret = enc.encode(orig, buf);
checkEqual(ret, encoded.length,
"Base64 enc.encode(src, null) returns wrong size!");
buf = Arrays.copyOf(buf, ret);
checkEqual(buf, encoded,
"Base64 enc.encode(src, dst) failed!");
// --------testing decode(in, out); -> bigger buf--------
buf = new byte[orig.length + rnd.nextInt(100)];
ret = dec.decode(encoded, buf);
checkEqual(ret, orig.length,
"Base64 enc.encode(src, null) returns wrong size!");
buf = Arrays.copyOf(buf, ret);
checkEqual(buf, orig,
"Base64 dec.decode(src, dst) failed!");
}
}
}
}
private static final byte[] ba_null = null;
private static final String str_null = null;
private static final ByteBuffer bb_null = null;
private static void testNull(final Base64.Encoder enc) {
checkNull(new Runnable() { public void run() { enc.encode(ba_null); }});
checkNull(new Runnable() { public void run() { enc.encodeToString(ba_null); }});
checkNull(new Runnable() { public void run() { enc.encode(ba_null, new byte[10]); }});
checkNull(new Runnable() { public void run() { enc.encode(new byte[10], ba_null); }});
checkNull(new Runnable() { public void run() { enc.encode(bb_null); }});
checkNull(new Runnable() { public void run() { enc.wrap((OutputStream)null); }});
}
private static void testNull(final Base64.Decoder dec) {
checkNull(new Runnable() { public void run() { dec.decode(ba_null); }});
checkNull(new Runnable() { public void run() { dec.decode(str_null); }});
checkNull(new Runnable() { public void run() { dec.decode(ba_null, new byte[10]); }});
checkNull(new Runnable() { public void run() { dec.decode(new byte[10], ba_null); }});
checkNull(new Runnable() { public void run() { dec.decode(bb_null); }});
checkNull(new Runnable() { public void run() { dec.wrap((InputStream)null); }});
}
private static interface Testable {
public void test() throws Throwable;
}
private static void testIOE(final Base64.Encoder enc) throws Throwable {
ByteArrayOutputStream baos = new ByteArrayOutputStream(8192);
final OutputStream os = enc.wrap(baos);
os.write(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9});
os.close();
checkIOE(new Testable() { public void test() throws Throwable { os.write(10); }});
checkIOE(new Testable() { public void test() throws Throwable { os.write(new byte[] {10}); }});
checkIOE(new Testable() { public void test() throws Throwable { os.write(new byte[] {10}, 1, 4); }});
}
private static void testIOE(final Base64.Decoder dec, byte[] decoded) throws Throwable {
ByteArrayInputStream bais = new ByteArrayInputStream(decoded);
final InputStream is = dec.wrap(bais);
is.read(new byte[10]);
is.close();
checkIOE(new Testable() { public void test() throws Throwable { is.read(); }});
checkIOE(new Testable() { public void test() throws Throwable { is.read(new byte[] {10}); }});
checkIOE(new Testable() { public void test() throws Throwable { is.read(new byte[] {10}, 1, 4); }});
checkIOE(new Testable() { public void test() throws Throwable { is.available(); }});
checkIOE(new Testable() { public void test() throws Throwable { is.skip(20); }});
}
private static final void checkNull(Runnable r) {
try {
r.run();
throw new RuntimeException("NPE is not thrown as expected");
} catch (NullPointerException npe) {}
}
private static final void checkIOE(Testable t) throws Throwable {
try {
t.test();
throw new RuntimeException("IOE is not thrown as expected");
} catch (IOException ioe) {}
}
private static final void checkIAE(Runnable r) throws Throwable {
try {
r.run();
throw new RuntimeException("IAE is not thrown as expected");
} catch (IllegalArgumentException iae) {}
}
private static void testDecodeIgnoredAfterPadding() throws Throwable {
for (byte nonBase64 : new byte[] {'#', '(', '!', '\\', '-', '_', '\n', '\r'}) {
byte[][] src = new byte[][] {
"A".getBytes("ascii"),
"AB".getBytes("ascii"),
"ABC".getBytes("ascii"),
"ABCD".getBytes("ascii"),
"ABCDE".getBytes("ascii")
};
Base64.Encoder encM = Base64.getMimeEncoder();
Base64.Decoder decM = Base64.getMimeDecoder();
Base64.Encoder enc = Base64.getEncoder();
Base64.Decoder dec = Base64.getDecoder();
for (int i = 0; i < src.length; i++) {
// decode(byte[])
byte[] encoded = encM.encode(src[i]);
encoded = Arrays.copyOf(encoded, encoded.length + 1);
encoded[encoded.length - 1] = nonBase64;
checkEqual(decM.decode(encoded), src[i], "Non-base64 char is not ignored");
byte[] decoded = new byte[src[i].length];
decM.decode(encoded, decoded);
checkEqual(decoded, src[i], "Non-base64 char is not ignored");
try {
dec.decode(encoded);
throw new RuntimeException("No IAE for non-base64 char");
} catch (IllegalArgumentException iae) {}
}
}
}
private static void testMalformedPadding() throws Throwable {
Object[] data = new Object[] {
"$=#", "", 0, // illegal ending unit
"A", "", 0, // dangling single byte
"A=", "", 0,
"A==", "", 0,
"QUJDA", "ABC", 4,
"QUJDA=", "ABC", 4,
"QUJDA==", "ABC", 4,
"=", "", 0, // unnecessary padding
"QUJD=", "ABC", 4, //"ABC".encode() -> "QUJD"
"AA=", "", 0, // incomplete padding
"QQ=", "", 0,
"QQ=N", "", 0, // incorrect padding
"QQ=?", "", 0,
"QUJDQQ=", "ABC", 4,
"QUJDQQ=N", "ABC", 4,
"QUJDQQ=?", "ABC", 4,
};
Base64.Decoder[] decs = new Base64.Decoder[] {
Base64.getDecoder(),
Base64.getUrlDecoder(),
Base64.getMimeDecoder()
};
for (Base64.Decoder dec : decs) {
for (int i = 0; i < data.length; i += 3) {
final String srcStr = (String)data[i];
final byte[] srcBytes = srcStr.getBytes("ASCII");
final ByteBuffer srcBB = ByteBuffer.wrap(srcBytes);
byte[] expected = ((String)data[i + 1]).getBytes("ASCII");
int pos = (Integer)data[i + 2];
// decode(byte[])
checkIAE(new Runnable() { public void run() { dec.decode(srcBytes); }});
// decode(String)
checkIAE(new Runnable() { public void run() { dec.decode(srcStr); }});
// decode(ByteBuffer)
checkIAE(new Runnable() { public void run() { dec.decode(srcBB); }});
// wrap stream
checkIOE(new Testable() {
public void test() throws IOException {
try (InputStream is = dec.wrap(new ByteArrayInputStream(srcBytes))) {
while (is.read() != -1);
}
}});
}
}
}
private static void testDecodeUnpadded() throws Throwable {
byte[] srcA = new byte[] { 'Q', 'Q' };
byte[] srcAA = new byte[] { 'Q', 'Q', 'E'};
Base64.Decoder dec = Base64.getDecoder();
byte[] ret = dec.decode(srcA);
if (ret[0] != 'A')
throw new RuntimeException("Decoding unpadding input A failed");
ret = dec.decode(srcAA);
if (ret[0] != 'A' && ret[1] != 'A')
throw new RuntimeException("Decoding unpadding input AA failed");
ret = new byte[10];
if (dec.wrap(new ByteArrayInputStream(srcA)).read(ret) != 1 &&
ret[0] != 'A')
throw new RuntimeException("Decoding unpadding input A from stream failed");
if (dec.wrap(new ByteArrayInputStream(srcA)).read(ret) != 2 &&
ret[0] != 'A' && ret[1] != 'A')
throw new RuntimeException("Decoding unpadding input AA from stream failed");
}
// single-non-base64-char should be ignored for mime decoding, but
// iae for basic decoding
private static void testSingleNonBase64MimeDec() throws Throwable {
for (String nonBase64 : new String[] {"#", "(", "!", "\\", "-", "_"}) {
if (Base64.getMimeDecoder().decode(nonBase64).length != 0) {
throw new RuntimeException("non-base64 char is not ignored");
}
try {
Base64.getDecoder().decode(nonBase64);
throw new RuntimeException("No IAE for single non-base64 char");
} catch (IllegalArgumentException iae) {}
}
}
private static final void testEncode(Base64.Encoder enc, ByteBuffer bin, byte[] expected)
throws Throwable {
ByteBuffer bout = enc.encode(bin);
byte[] buf = new byte[bout.remaining()];
bout.get(buf);
if (bin.hasRemaining()) {
throw new RuntimeException(
"Base64 enc.encode(ByteBuffer) failed!");
}
checkEqual(buf, expected, "Base64 enc.encode(bf, bf) failed!");
}
private static final void testDecode(Base64.Decoder dec, ByteBuffer bin, byte[] expected)
throws Throwable {
ByteBuffer bout = dec.decode(bin);
byte[] buf = new byte[bout.remaining()];
bout.get(buf);
checkEqual(buf, expected, "Base64 dec.decode(bf) failed!");
}
private static final void checkEqual(int v1, int v2, String msg)
throws Throwable {
if (v1 != v2) {
System.out.printf(" v1=%d%n", v1);
System.out.printf(" v2=%d%n", v2);
throw new RuntimeException(msg);
}
}
private static final void checkEqual(byte[] r1, byte[] r2, String msg)
throws Throwable {
if (!Arrays.equals(r1, r2)) {
System.out.printf(" r1[%d]=[%s]%n", r1.length, new String(r1));
System.out.printf(" r2[%d]=[%s]%n", r2.length, new String(r2));
throw new RuntimeException(msg);
}
}
// remove line feeds,
private static final byte[] normalize(byte[] src) {
int n = 0;
boolean hasUrl = false;
for (int i = 0; i < src.length; i++) {
if (src[i] == '\r' || src[i] == '\n')
n++;
if (src[i] == '-' || src[i] == '_')
hasUrl = true;
}
if (n == 0 && hasUrl == false)
return src;
byte[] ret = new byte[src.length - n];
int j = 0;
for (int i = 0; i < src.length; i++) {
if (src[i] == '-')
ret[j++] = '+';
else if (src[i] == '_')
ret[j++] = '/';
else if (src[i] != '\r' && src[i] != '\n')
ret[j++] = src[i];
}
return ret;
}
}
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