add a Base64 implementation to the API
b/1413917 - RFE: Base64 utility class Change-Id: I11697859e1f78f596b92d2e03a49ed1be04ae42d
This commit is contained in:
Doug Zongker
265
api/current.xml
265
api/current.xml
@@ -163525,6 +163525,271 @@
|
||||
</method>
|
||||
</class>
|
||||
</package>
|
||||
<package name="android.util.base64"
|
||||
>
|
||||
<class name="Base64"
|
||||
extends="java.lang.Object"
|
||||
abstract="false"
|
||||
static="false"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<method name="decode"
|
||||
return="byte[]"
|
||||
abstract="false"
|
||||
native="false"
|
||||
synchronized="false"
|
||||
static="true"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="str" type="java.lang.String">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
</method>
|
||||
<method name="decode"
|
||||
return="byte[]"
|
||||
abstract="false"
|
||||
native="false"
|
||||
synchronized="false"
|
||||
static="true"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="input" type="byte[]">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
</method>
|
||||
<method name="decode"
|
||||
return="byte[]"
|
||||
abstract="false"
|
||||
native="false"
|
||||
synchronized="false"
|
||||
static="true"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="input" type="byte[]">
|
||||
</parameter>
|
||||
<parameter name="offset" type="int">
|
||||
</parameter>
|
||||
<parameter name="len" type="int">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
</method>
|
||||
<method name="encode"
|
||||
return="byte[]"
|
||||
abstract="false"
|
||||
native="false"
|
||||
synchronized="false"
|
||||
static="true"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="input" type="byte[]">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
</method>
|
||||
<method name="encode"
|
||||
return="byte[]"
|
||||
abstract="false"
|
||||
native="false"
|
||||
synchronized="false"
|
||||
static="true"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="input" type="byte[]">
|
||||
</parameter>
|
||||
<parameter name="offset" type="int">
|
||||
</parameter>
|
||||
<parameter name="len" type="int">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
</method>
|
||||
<method name="encodeToString"
|
||||
return="java.lang.String"
|
||||
abstract="false"
|
||||
native="false"
|
||||
synchronized="false"
|
||||
static="true"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="input" type="byte[]">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
</method>
|
||||
<method name="encodeToString"
|
||||
return="java.lang.String"
|
||||
abstract="false"
|
||||
native="false"
|
||||
synchronized="false"
|
||||
static="true"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="input" type="byte[]">
|
||||
</parameter>
|
||||
<parameter name="offset" type="int">
|
||||
</parameter>
|
||||
<parameter name="len" type="int">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
</method>
|
||||
<field name="CRLF"
|
||||
type="int"
|
||||
transient="false"
|
||||
volatile="false"
|
||||
value="4"
|
||||
static="true"
|
||||
final="true"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
</field>
|
||||
<field name="DEFAULT"
|
||||
type="int"
|
||||
transient="false"
|
||||
volatile="false"
|
||||
value="0"
|
||||
static="true"
|
||||
final="true"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
</field>
|
||||
<field name="NO_CLOSE"
|
||||
type="int"
|
||||
transient="false"
|
||||
volatile="false"
|
||||
value="16"
|
||||
static="true"
|
||||
final="true"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
</field>
|
||||
<field name="NO_PADDING"
|
||||
type="int"
|
||||
transient="false"
|
||||
volatile="false"
|
||||
value="1"
|
||||
static="true"
|
||||
final="true"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
</field>
|
||||
<field name="NO_WRAP"
|
||||
type="int"
|
||||
transient="false"
|
||||
volatile="false"
|
||||
value="2"
|
||||
static="true"
|
||||
final="true"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
</field>
|
||||
<field name="WEB_SAFE"
|
||||
type="int"
|
||||
transient="false"
|
||||
volatile="false"
|
||||
value="8"
|
||||
static="true"
|
||||
final="true"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
</field>
|
||||
</class>
|
||||
<class name="Base64InputStream"
|
||||
extends="java.io.FilterInputStream"
|
||||
abstract="false"
|
||||
static="false"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<constructor name="Base64InputStream"
|
||||
type="android.util.base64.Base64InputStream"
|
||||
static="false"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="in" type="java.io.InputStream">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
</constructor>
|
||||
<constructor name="Base64InputStream"
|
||||
type="android.util.base64.Base64InputStream"
|
||||
static="false"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="in" type="java.io.InputStream">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
<parameter name="encode" type="boolean">
|
||||
</parameter>
|
||||
</constructor>
|
||||
</class>
|
||||
<class name="Base64OutputStream"
|
||||
extends="java.io.FilterOutputStream"
|
||||
abstract="false"
|
||||
static="false"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<constructor name="Base64OutputStream"
|
||||
type="android.util.base64.Base64OutputStream"
|
||||
static="false"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="out" type="java.io.OutputStream">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
</constructor>
|
||||
<constructor name="Base64OutputStream"
|
||||
type="android.util.base64.Base64OutputStream"
|
||||
static="false"
|
||||
final="false"
|
||||
deprecated="not deprecated"
|
||||
visibility="public"
|
||||
>
|
||||
<parameter name="out" type="java.io.OutputStream">
|
||||
</parameter>
|
||||
<parameter name="flags" type="int">
|
||||
</parameter>
|
||||
<parameter name="encode" type="boolean">
|
||||
</parameter>
|
||||
</constructor>
|
||||
</class>
|
||||
</package>
|
||||
<package name="android.view"
|
||||
>
|
||||
<class name="AbsSavedState"
|
||||
|
||||
706
core/java/android/util/base64/Base64.java
Normal file
706
core/java/android/util/base64/Base64.java
Normal file
@@ -0,0 +1,706 @@
|
||||
/*
|
||||
* Copyright (C) 2010 The Android Open Source Project
|
||||
*
|
||||
* 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 android.util.base64;
|
||||
|
||||
/**
|
||||
* Utilities for encoding and decoding the Base64 encoding. See RFCs
|
||||
* 2045 and 3548.
|
||||
*/
|
||||
public class Base64 {
|
||||
/**
|
||||
* Default values for encoder/decoder flags.
|
||||
*/
|
||||
public static final int DEFAULT = 0;
|
||||
|
||||
/**
|
||||
* Encoder flag bit to indicate you want the padding '='
|
||||
* characters at the end (if any) to be omitted.
|
||||
*/
|
||||
public static final int NO_PADDING = 1;
|
||||
|
||||
/**
|
||||
* Encoder flag bit to indicate you want all line terminators to
|
||||
* be omitted (ie, the output will be on one long line).
|
||||
*/
|
||||
public static final int NO_WRAP = 2;
|
||||
|
||||
/**
|
||||
* Encoder flag bit to indicate you want lines to be ended with
|
||||
* CRLF instead of just LF. Has no effect if {@code NO_WRAP} is
|
||||
* specified as well.
|
||||
*/
|
||||
public static final int CRLF = 4;
|
||||
|
||||
/**
|
||||
* Encoder/decoder flag bit to indicate using the "web safe"
|
||||
* variant of Base64 (see RFC 3548 section 4) where '-' and '_'
|
||||
* are used in place of '+' and '/'.
|
||||
*/
|
||||
public static final int WEB_SAFE = 8;
|
||||
|
||||
/**
|
||||
* Flag to pass to Base64OutputStream to indicate that it should
|
||||
* not close the output stream it is wrapping when it itself is
|
||||
* closed.
|
||||
*/
|
||||
public static final int NO_CLOSE = 16;
|
||||
|
||||
// --------------------------------------------------------
|
||||
// decoding
|
||||
// --------------------------------------------------------
|
||||
|
||||
/**
|
||||
* Lookup table for turning bytes into their position in the
|
||||
* Base64 alphabet.
|
||||
*/
|
||||
private static final int DECODE[] = {
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
|
||||
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -2, -1, -1,
|
||||
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
|
||||
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
|
||||
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
|
||||
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
};
|
||||
|
||||
/**
|
||||
* Decode lookup table for the "web safe" variant (RFC 3548
|
||||
* sec. 4) where - and _ replace + and /.
|
||||
*/
|
||||
private static final int DECODE_WEBSAFE[] = {
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1,
|
||||
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -2, -1, -1,
|
||||
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
|
||||
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, 63,
|
||||
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
|
||||
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
};
|
||||
|
||||
/** Non-data values in the DECODE arrays. */
|
||||
private static final int SKIP = -1;
|
||||
private static final int EQUALS = -2;
|
||||
|
||||
/**
|
||||
* Decode the Base64-encoded data in input and return the data in
|
||||
* a new byte array.
|
||||
*
|
||||
* The padding '=' characters at the end are considered optional, but
|
||||
* if any are present, there must be the correct number of them.
|
||||
*
|
||||
* @param input the input String to decode, which is converted to
|
||||
* bytes using the default charset
|
||||
* @param flags controls certain features of the decoded output.
|
||||
* Pass {@code DEFAULT} to decode standard Base64.
|
||||
*
|
||||
* @throws IllegalArgumentException if the input contains
|
||||
* incorrect padding
|
||||
*/
|
||||
public static byte[] decode(String str, int flags) {
|
||||
return decode(str.getBytes(), flags);
|
||||
}
|
||||
|
||||
/**
|
||||
* Decode the Base64-encoded data in input and return the data in
|
||||
* a new byte array.
|
||||
*
|
||||
* The padding '=' characters at the end are considered optional, but
|
||||
* if any are present, there must be the correct number of them.
|
||||
*
|
||||
* @param input the input array to decode
|
||||
* @param flags controls certain features of the decoded output.
|
||||
* Pass {@code DEFAULT} to decode standard Base64.
|
||||
*
|
||||
* @throws IllegalArgumentException if the input contains
|
||||
* incorrect padding
|
||||
*/
|
||||
public static byte[] decode(byte[] input, int flags) {
|
||||
return decode(input, 0, input.length, flags);
|
||||
}
|
||||
|
||||
/**
|
||||
* Decode the Base64-encoded data in input and return the data in
|
||||
* a new byte array.
|
||||
*
|
||||
* The padding '=' characters at the end are considered optional, but
|
||||
* if any are present, there must be the correct number of them.
|
||||
*
|
||||
* @param input the data to decode
|
||||
* @param offset the position within the input array at which to start
|
||||
* @param len the number of bytes of input to decode
|
||||
* @param flags controls certain features of the decoded output.
|
||||
* Pass {@code DEFAULT} to decode standard Base64.
|
||||
*
|
||||
* @throws IllegalArgumentException if the input contains
|
||||
* incorrect padding
|
||||
*/
|
||||
public static byte[] decode(byte[] input, int offset, int len, int flags) {
|
||||
// Allocate space for the most data the input could represent.
|
||||
// (It could contain less if it contains whitespace, etc.)
|
||||
DecoderState state = new DecoderState(flags, new byte[len*3/4]);
|
||||
|
||||
if (!decodeInternal(input, offset, len, state, true)) {
|
||||
throw new IllegalArgumentException("bad base-64");
|
||||
}
|
||||
|
||||
// Maybe we got lucky and allocated exactly enough output space.
|
||||
if (state.op == state.output.length) {
|
||||
return state.output;
|
||||
}
|
||||
|
||||
// Need to shorten the array, so allocate a new one of the
|
||||
// right size and copy.
|
||||
byte[] temp = new byte[state.op];
|
||||
System.arraycopy(state.output, 0, temp, 0, state.op);
|
||||
return temp;
|
||||
}
|
||||
|
||||
/* package */ static class DecoderState {
|
||||
public byte[] output;
|
||||
public int op;
|
||||
|
||||
public int state; // state number (0 to 6)
|
||||
public int value;
|
||||
|
||||
final public int[] alphabet;
|
||||
|
||||
public DecoderState(int flags, byte[] output) {
|
||||
this.output = output;
|
||||
|
||||
alphabet = ((flags & WEB_SAFE) == 0) ? DECODE : DECODE_WEBSAFE;
|
||||
state = 0;
|
||||
value = 0;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Decode another block of input data.
|
||||
*
|
||||
* @param dstate a DecoderState object whose (caller-provided)
|
||||
* output array is big enough to hold all the decoded data.
|
||||
* On return, dstate.op will be set to the length of the
|
||||
* decoded data.
|
||||
* @param finish true if this is the final call to decodeInternal
|
||||
* with the given DecoderState object. Will finalize the
|
||||
* decoder state and include any final bytes in the output.
|
||||
*
|
||||
* @return true if the state machine is still healthy. false if
|
||||
* bad base-64 data has been detected in the input stream.
|
||||
*/
|
||||
|
||||
/* package */ static boolean decodeInternal(
|
||||
byte[] input, int offset, int len, final DecoderState dstate, boolean finish) {
|
||||
if (dstate.state == 6) return false;
|
||||
|
||||
int state = dstate.state;
|
||||
int value = dstate.value;
|
||||
final int[] decode = dstate.alphabet;
|
||||
final byte[] output = dstate.output;
|
||||
int op = 0;
|
||||
|
||||
int p = offset;
|
||||
len += offset;
|
||||
|
||||
while (p < len) {
|
||||
|
||||
// Try the fast path: we're starting a new tuple and the
|
||||
// next four bytes of the input stream are all data
|
||||
// bytes. This corresponds to going through states
|
||||
// 0-1-2-3-0. We expect to use this method for most of
|
||||
// the data.
|
||||
//
|
||||
// If any of the next four bytes of input are non-data
|
||||
// (whitespace, etc.), value will end up negative. (All
|
||||
// the non-data values in decode are small negative
|
||||
// numbers, so shifting any of them up and or'ing them
|
||||
// together will result in a value with its top bit set.)
|
||||
//
|
||||
// You can remove this whole block and the output should
|
||||
// be the same, just slower.
|
||||
if (state == 0 && p+4 <= len &&
|
||||
(value = ((decode[input[p] & 0xff] << 18) |
|
||||
(decode[input[p+1] & 0xff] << 12) |
|
||||
(decode[input[p+2] & 0xff] << 6) |
|
||||
(decode[input[p+3] & 0xff]))) >= 0) {
|
||||
output[op+2] = (byte) value;
|
||||
output[op+1] = (byte) (value >> 8);
|
||||
output[op] = (byte) (value >> 16);
|
||||
op += 3;
|
||||
p += 4;
|
||||
continue;
|
||||
}
|
||||
|
||||
// The fast path isn't available -- either we've read a
|
||||
// partial tuple, or the next four input bytes aren't all
|
||||
// data, or whatever. Fall back to the slower state
|
||||
// machine implementation.
|
||||
//
|
||||
// States 0-3 are reading through the next input tuple.
|
||||
// State 4 is having read one '=' and expecting exactly
|
||||
// one more.
|
||||
// State 5 is expecting no more data or padding characters
|
||||
// in the input.
|
||||
// State 6 is the error state; an error has been detected
|
||||
// in the input and no future input can "fix" it.
|
||||
|
||||
int d = decode[input[p++] & 0xff];
|
||||
|
||||
switch (state) {
|
||||
case 0:
|
||||
if (d >= 0) {
|
||||
value = d;
|
||||
++state;
|
||||
} else if (d != SKIP) {
|
||||
dstate.state = 6;
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
|
||||
case 1:
|
||||
if (d >= 0) {
|
||||
value = (value << 6) | d;
|
||||
++state;
|
||||
} else if (d != SKIP) {
|
||||
dstate.state = 6;
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
|
||||
case 2:
|
||||
if (d >= 0) {
|
||||
value = (value << 6) | d;
|
||||
++state;
|
||||
} else if (d == EQUALS) {
|
||||
// Emit the last (partial) output tuple;
|
||||
// expect exactly one more padding character.
|
||||
output[op++] = (byte) (value >> 4);
|
||||
state = 4;
|
||||
} else if (d != SKIP) {
|
||||
dstate.state = 6;
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
|
||||
case 3:
|
||||
if (d >= 0) {
|
||||
// Emit the output triple and return to state 0.
|
||||
value = (value << 6) | d;
|
||||
output[op+2] = (byte) value;
|
||||
output[op+1] = (byte) (value >> 8);
|
||||
output[op] = (byte) (value >> 16);
|
||||
op += 3;
|
||||
state = 0;
|
||||
} else if (d == EQUALS) {
|
||||
// Emit the last (partial) output tuple;
|
||||
// expect no further data or padding characters.
|
||||
output[op+1] = (byte) (value >> 2);
|
||||
output[op] = (byte) (value >> 10);
|
||||
op += 2;
|
||||
state = 5;
|
||||
} else if (d != SKIP) {
|
||||
dstate.state = 6;
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
|
||||
case 4:
|
||||
if (d == EQUALS) {
|
||||
++state;
|
||||
} else if (d != SKIP) {
|
||||
dstate.state = 6;
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
|
||||
case 5:
|
||||
if (d != SKIP) {
|
||||
dstate.state = 6;
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!finish) {
|
||||
// We're out of input, but a future call could provide
|
||||
// more. Return the output we've produced on this call
|
||||
// and save the current state of the state machine.
|
||||
dstate.state = state;
|
||||
dstate.value = value;
|
||||
dstate.op = op;
|
||||
return true;
|
||||
}
|
||||
|
||||
// Done reading input. Now figure out where we are left in
|
||||
// the state machine and finish up.
|
||||
|
||||
switch (state) {
|
||||
case 0:
|
||||
// Output length is a multiple of three. Fine.
|
||||
break;
|
||||
case 1:
|
||||
// Read one extra input byte, which isn't enough to
|
||||
// make another output byte. Illegal.
|
||||
dstate.state = 6;
|
||||
return false;
|
||||
case 2:
|
||||
// Read two extra input bytes, enough to emit 1 more
|
||||
// output byte. Fine.
|
||||
output[op++] = (byte) (value >> 4);
|
||||
break;
|
||||
case 3:
|
||||
// Read three extra input bytes, enough to emit 2 more
|
||||
// output bytes. Fine.
|
||||
output[op+1] = (byte) (value >> 2);
|
||||
output[op] = (byte) (value >> 10);
|
||||
op += 2;
|
||||
break;
|
||||
case 4:
|
||||
// Read one padding '=' when we expected 2. Illegal.
|
||||
dstate.state = 6;
|
||||
return false;
|
||||
case 5:
|
||||
// Read all the padding '='s we expected and no more.
|
||||
// Fine.
|
||||
break;
|
||||
}
|
||||
|
||||
dstate.op = op;
|
||||
return true;
|
||||
}
|
||||
|
||||
// --------------------------------------------------------
|
||||
// encoding
|
||||
// --------------------------------------------------------
|
||||
|
||||
/**
|
||||
* Emit a new line every this many output tuples. Corresponds to
|
||||
* a 76-character line length (the maximum allowable according to
|
||||
* RFC 2045).
|
||||
*/
|
||||
private static final int LINE_GROUPS = 19;
|
||||
|
||||
/**
|
||||
* Lookup table for turning Base64 alphabet positions (6 bits)
|
||||
* into output bytes.
|
||||
*/
|
||||
private static final byte ENCODE[] = {
|
||||
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
|
||||
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
|
||||
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
|
||||
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
|
||||
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
|
||||
'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
|
||||
'w', 'x', 'y', 'z', '0', '1', '2', '3',
|
||||
'4', '5', '6', '7', '8', '9', '+', '/',
|
||||
};
|
||||
|
||||
/**
|
||||
* Lookup table for turning Base64 alphabet positions (6 bits)
|
||||
* into output bytes.
|
||||
*/
|
||||
private static final byte ENCODE_WEBSAFE[] = {
|
||||
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
|
||||
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
|
||||
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
|
||||
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
|
||||
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
|
||||
'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
|
||||
'w', 'x', 'y', 'z', '0', '1', '2', '3',
|
||||
'4', '5', '6', '7', '8', '9', '-', '_',
|
||||
};
|
||||
|
||||
/**
|
||||
* Base64-encode the given data and return a newly allocated
|
||||
* String with the result.
|
||||
*
|
||||
* @param input the data to encode
|
||||
* @param flags controls certain features of the encoded output.
|
||||
* Passing {@code DEFAULT} results in output that
|
||||
* adheres to RFC 2045.
|
||||
*/
|
||||
public static String encodeToString(byte[] input, int flags) {
|
||||
return new String(encode(input, flags));
|
||||
}
|
||||
|
||||
/**
|
||||
* Base64-encode the given data and return a newly allocated
|
||||
* String with the result.
|
||||
*
|
||||
* @param input the data to encode
|
||||
* @param offset the position within the input array at which to
|
||||
* start
|
||||
* @param len the number of bytes of input to encode
|
||||
* @param flags controls certain features of the encoded output.
|
||||
* Passing {@code DEFAULT} results in output that
|
||||
* adheres to RFC 2045.
|
||||
*/
|
||||
public static String encodeToString(byte[] input, int offset, int len, int flags) {
|
||||
return new String(encode(input, offset, len, flags));
|
||||
}
|
||||
|
||||
/**
|
||||
* Base64-encode the given data and return a newly allocated
|
||||
* byte[] with the result.
|
||||
*
|
||||
* @param input the data to encode
|
||||
* @param flags controls certain features of the encoded output.
|
||||
* Passing {@code DEFAULT} results in output that
|
||||
* adheres to RFC 2045.
|
||||
*/
|
||||
public static byte[] encode(byte[] input, int flags) {
|
||||
return encode(input, 0, input.length, flags);
|
||||
}
|
||||
|
||||
/**
|
||||
* Base64-encode the given data and return a newly allocated
|
||||
* byte[] with the result.
|
||||
*
|
||||
* @param input the data to encode
|
||||
* @param offset the position within the input array at which to
|
||||
* start
|
||||
* @param len the number of bytes of input to encode
|
||||
* @param flags controls certain features of the encoded output.
|
||||
* Passing {@code DEFAULT} results in output that
|
||||
* adheres to RFC 2045.
|
||||
*/
|
||||
public static byte[] encode(byte[] input, int offset, int len, int flags) {
|
||||
EncoderState state = new EncoderState(flags, null);
|
||||
|
||||
// Compute the exact length of the array we will produce.
|
||||
int output_len = len / 3 * 4;
|
||||
|
||||
// Account for the tail of the data and the padding bytes, if any.
|
||||
if (state.do_padding) {
|
||||
if (len % 3 > 0) {
|
||||
output_len += 4;
|
||||
}
|
||||
} else {
|
||||
switch (len % 3) {
|
||||
case 0: break;
|
||||
case 1: output_len += 2; break;
|
||||
case 2: output_len += 3; break;
|
||||
}
|
||||
}
|
||||
|
||||
// Account for the newlines, if any.
|
||||
if (state.do_newline && len > 0) {
|
||||
output_len += (((len-1) / (3 * LINE_GROUPS)) + 1) * (state.do_cr ? 2 : 1);
|
||||
}
|
||||
|
||||
state.output = new byte[output_len];
|
||||
encodeInternal(input, offset, len, state, true);
|
||||
|
||||
assert state.op == output_len;
|
||||
|
||||
return state.output;
|
||||
}
|
||||
|
||||
/* package */ static class EncoderState {
|
||||
public byte[] output;
|
||||
public int op;
|
||||
|
||||
final public byte[] tail;
|
||||
public int tailLen;
|
||||
public int count;
|
||||
|
||||
final public boolean do_padding;
|
||||
final public boolean do_newline;
|
||||
final public boolean do_cr;
|
||||
final public byte[] alphabet;
|
||||
|
||||
public EncoderState(int flags, byte[] output) {
|
||||
this.output = output;
|
||||
|
||||
do_padding = (flags & NO_PADDING) == 0;
|
||||
do_newline = (flags & NO_WRAP) == 0;
|
||||
do_cr = (flags & CRLF) != 0;
|
||||
alphabet = ((flags & WEB_SAFE) == 0) ? ENCODE : ENCODE_WEBSAFE;
|
||||
|
||||
tail = new byte[2];
|
||||
tailLen = 0;
|
||||
|
||||
count = do_newline ? LINE_GROUPS : -1;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Encode another block of input data.
|
||||
*
|
||||
* @param estate an EncoderState object whose (caller-provided)
|
||||
* output array is big enough to hold all the encoded data.
|
||||
* On return, estate.op will be set to the length of the
|
||||
* encoded data.
|
||||
* @param finish true if this is the final call to encodeInternal
|
||||
* with the given EncoderState object. Will finalize the
|
||||
* encoder state and include any final bytes in the output.
|
||||
*/
|
||||
static void encodeInternal(byte[] input, int offset, int len,
|
||||
final EncoderState estate, boolean finish) {
|
||||
final boolean do_cr = estate.do_cr;
|
||||
final boolean do_newline = estate.do_newline;
|
||||
final boolean do_padding = estate.do_padding;
|
||||
final byte[] output = estate.output;
|
||||
|
||||
int op = 0;
|
||||
|
||||
int p = offset;
|
||||
len += offset;
|
||||
int v = -1;
|
||||
int count = estate.count;
|
||||
|
||||
// First we need to concatenate the tail of the previous call
|
||||
// with any input bytes available now and see if we can empty
|
||||
// the tail.
|
||||
|
||||
switch (estate.tailLen) {
|
||||
case 0:
|
||||
// There was no tail.
|
||||
break;
|
||||
|
||||
case 1:
|
||||
if (p+2 <= len) {
|
||||
// A 1-byte tail with at least 2 bytes of
|
||||
// input available now.
|
||||
v = ((estate.tail[0] & 0xff) << 16) |
|
||||
((input[p++] & 0xff) << 8) |
|
||||
(input[p++] & 0xff);
|
||||
estate.tailLen = 0;
|
||||
};
|
||||
break;
|
||||
|
||||
case 2:
|
||||
if (p+1 <= len) {
|
||||
// A 2-byte tail with at least 1 byte of input.
|
||||
v = ((estate.tail[0] & 0xff) << 16) |
|
||||
((estate.tail[1] & 0xff) << 8) |
|
||||
(input[p++] & 0xff);
|
||||
estate.tailLen = 0;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (v != -1) {
|
||||
output[op++] = estate.alphabet[(v >> 18) & 0x3f];
|
||||
output[op++] = estate.alphabet[(v >> 12) & 0x3f];
|
||||
output[op++] = estate.alphabet[(v >> 6) & 0x3f];
|
||||
output[op++] = estate.alphabet[v & 0x3f];
|
||||
if (--count == 0) {
|
||||
if (do_cr) output[op++] = '\r';
|
||||
output[op++] = '\n';
|
||||
count = LINE_GROUPS;
|
||||
}
|
||||
}
|
||||
|
||||
// At this point either there is no tail, or there are fewer
|
||||
// than 3 bytes of input available.
|
||||
|
||||
// The main loop, turning 3 input bytes into 4 output bytes on
|
||||
// each iteration.
|
||||
while (p+3 <= len) {
|
||||
v = ((input[p++] & 0xff) << 16) |
|
||||
((input[p++] & 0xff) << 8) |
|
||||
(input[p++] & 0xff);
|
||||
output[op++] = estate.alphabet[(v >> 18) & 0x3f];
|
||||
output[op++] = estate.alphabet[(v >> 12) & 0x3f];
|
||||
output[op++] = estate.alphabet[(v >> 6) & 0x3f];
|
||||
output[op++] = estate.alphabet[v & 0x3f];
|
||||
if (--count == 0) {
|
||||
if (do_cr) output[op++] = '\r';
|
||||
output[op++] = '\n';
|
||||
count = LINE_GROUPS;
|
||||
}
|
||||
}
|
||||
|
||||
if (finish) {
|
||||
// Finish up the tail of the input. Note that we need to
|
||||
// consume any bytes in estate.tail before any bytes
|
||||
// remaining in input; there should be at most two bytes
|
||||
// total.
|
||||
|
||||
if (p-estate.tailLen == len-1) {
|
||||
int t = 0;
|
||||
v = ((estate.tailLen > 0 ? estate.tail[t++] : input[p++]) & 0xff) << 4;
|
||||
estate.tailLen -= t;
|
||||
output[op++] = estate.alphabet[(v >> 6) & 0x3f];
|
||||
output[op++] = estate.alphabet[v & 0x3f];
|
||||
if (do_padding) {
|
||||
output[op++] = '=';
|
||||
output[op++] = '=';
|
||||
}
|
||||
if (do_newline) {
|
||||
if (do_cr) output[op++] = '\r';
|
||||
output[op++] = '\n';
|
||||
}
|
||||
} else if (p-estate.tailLen == len-2) {
|
||||
int t = 0;
|
||||
v = (((estate.tailLen > 1 ? estate.tail[t++] : input[p++]) & 0xff) << 10) |
|
||||
(((estate.tailLen > 0 ? estate.tail[t++] : input[p++]) & 0xff) << 2);
|
||||
estate.tailLen -= t;
|
||||
output[op++] = estate.alphabet[(v >> 12) & 0x3f];
|
||||
output[op++] = estate.alphabet[(v >> 6) & 0x3f];
|
||||
output[op++] = estate.alphabet[v & 0x3f];
|
||||
if (do_padding) {
|
||||
output[op++] = '=';
|
||||
}
|
||||
if (do_newline) {
|
||||
if (do_cr) output[op++] = '\r';
|
||||
output[op++] = '\n';
|
||||
}
|
||||
} else if (do_newline && op > 0 && count != LINE_GROUPS) {
|
||||
if (do_cr) output[op++] = '\r';
|
||||
output[op++] = '\n';
|
||||
}
|
||||
|
||||
assert estate.tailLen == 0;
|
||||
assert p == len;
|
||||
} else {
|
||||
// Save the leftovers in tail to be consumed on the next
|
||||
// call to encodeInternal.
|
||||
|
||||
if (p == len-1) {
|
||||
estate.tail[estate.tailLen++] = input[p];
|
||||
} else if (p == len-2) {
|
||||
estate.tail[estate.tailLen++] = input[p];
|
||||
estate.tail[estate.tailLen++] = input[p+1];
|
||||
}
|
||||
}
|
||||
|
||||
estate.op = op;
|
||||
estate.count = count;
|
||||
}
|
||||
|
||||
private Base64() { } // don't instantiate
|
||||
}
|
||||
169
core/java/android/util/base64/Base64InputStream.java
Normal file
169
core/java/android/util/base64/Base64InputStream.java
Normal file
@@ -0,0 +1,169 @@
|
||||
/*
|
||||
* Copyright (C) 2010 The Android Open Source Project
|
||||
*
|
||||
* 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 android.util.base64;
|
||||
|
||||
import java.io.FilterInputStream;
|
||||
import java.io.IOException;
|
||||
import java.io.InputStream;
|
||||
|
||||
/**
|
||||
* An OutputStream that does either Base64 encoding or decoding on the
|
||||
* data written to it, writing the resulting data to another
|
||||
* OutputStream.
|
||||
*/
|
||||
public class Base64InputStream extends FilterInputStream {
|
||||
private final boolean encode;
|
||||
private final Base64.EncoderState estate;
|
||||
private final Base64.DecoderState dstate;
|
||||
|
||||
private static byte[] EMPTY = new byte[0];
|
||||
|
||||
private static final int BUFFER_SIZE = 2048;
|
||||
private boolean eof;
|
||||
private byte[] inputBuffer;
|
||||
private byte[] outputBuffer;
|
||||
private int outputStart;
|
||||
private int outputEnd;
|
||||
|
||||
/**
|
||||
* An InputStream that performs Base64 decoding on the data read
|
||||
* from the wrapped stream.
|
||||
*
|
||||
* @param in the InputStream to read the source data from
|
||||
* @param flags bit flags for controlling the decoder; see the
|
||||
* constants in {@link Base64}
|
||||
*/
|
||||
public Base64InputStream(InputStream in, int flags) {
|
||||
this(in, flags, false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Performs Base64 encoding or decoding on the data read from the
|
||||
* wrapped InputStream.
|
||||
*
|
||||
* @param in the InputStream to read the source data from
|
||||
* @param flags bit flags for controlling the decoder; see the
|
||||
* constants in {@link Base64}
|
||||
* @param encode true to encode, false to decode
|
||||
*/
|
||||
public Base64InputStream(InputStream in, int flags, boolean encode) {
|
||||
super(in);
|
||||
this.encode = encode;
|
||||
eof = false;
|
||||
inputBuffer = new byte[BUFFER_SIZE];
|
||||
if (encode) {
|
||||
// len*8/5+10 is an overestimate of the most bytes the
|
||||
// encoder can produce for len bytes of input.
|
||||
outputBuffer = new byte[BUFFER_SIZE * 8/5 + 10];
|
||||
estate = new Base64.EncoderState(flags, outputBuffer);
|
||||
dstate = null;
|
||||
} else {
|
||||
// len*3/4+10 is an overestimate of the most bytes the
|
||||
// decoder can produce for len bytes of input.
|
||||
outputBuffer = new byte[BUFFER_SIZE * 3/4 + 10];
|
||||
estate = null;
|
||||
dstate = new Base64.DecoderState(flags, outputBuffer);
|
||||
}
|
||||
outputStart = 0;
|
||||
outputEnd = 0;
|
||||
}
|
||||
|
||||
public boolean markSupported() {
|
||||
return false;
|
||||
}
|
||||
|
||||
public void mark(int readlimit) {
|
||||
throw new UnsupportedOperationException();
|
||||
}
|
||||
|
||||
public void reset() {
|
||||
throw new UnsupportedOperationException();
|
||||
}
|
||||
|
||||
public void close() throws IOException {
|
||||
in.close();
|
||||
inputBuffer = null;
|
||||
}
|
||||
|
||||
public int available() {
|
||||
return outputEnd - outputStart;
|
||||
}
|
||||
|
||||
public long skip(long n) throws IOException {
|
||||
if (outputStart >= outputEnd) {
|
||||
refill();
|
||||
}
|
||||
if (outputStart >= outputEnd) {
|
||||
return 0;
|
||||
}
|
||||
long bytes = Math.min(n, outputEnd-outputStart);
|
||||
outputStart += bytes;
|
||||
return bytes;
|
||||
}
|
||||
|
||||
public int read() throws IOException {
|
||||
if (outputStart >= outputEnd) {
|
||||
refill();
|
||||
}
|
||||
if (outputStart >= outputEnd) {
|
||||
return -1;
|
||||
} else {
|
||||
return outputBuffer[outputStart++];
|
||||
}
|
||||
}
|
||||
|
||||
public int read(byte[] b, int off, int len) throws IOException {
|
||||
if (outputStart >= outputEnd) {
|
||||
refill();
|
||||
}
|
||||
if (outputStart >= outputEnd) {
|
||||
return -1;
|
||||
}
|
||||
int bytes = Math.min(len, outputEnd-outputStart);
|
||||
System.arraycopy(outputBuffer, outputStart, b, off, bytes);
|
||||
outputStart += bytes;
|
||||
return bytes;
|
||||
}
|
||||
|
||||
/**
|
||||
* Read data from the input stream into inputBuffer, then
|
||||
* decode/encode it into the empty outputBuffer, and reset the
|
||||
* outputStart and outputEnd pointers.
|
||||
*/
|
||||
private void refill() throws IOException {
|
||||
if (eof) return;
|
||||
int bytesRead = in.read(inputBuffer);
|
||||
if (encode) {
|
||||
if (bytesRead == -1) {
|
||||
eof = true;
|
||||
Base64.encodeInternal(EMPTY, 0, 0, estate, true);
|
||||
} else {
|
||||
Base64.encodeInternal(inputBuffer, 0, bytesRead, estate, false);
|
||||
}
|
||||
outputEnd = estate.op;
|
||||
} else {
|
||||
if (bytesRead == -1) {
|
||||
eof = true;
|
||||
Base64.decodeInternal(EMPTY, 0, 0, dstate, true);
|
||||
} else {
|
||||
Base64.decodeInternal(inputBuffer, 0, bytesRead, dstate, false);
|
||||
}
|
||||
outputEnd = dstate.op;
|
||||
}
|
||||
outputStart = 0;
|
||||
}
|
||||
}
|
||||
153
core/java/android/util/base64/Base64OutputStream.java
Normal file
153
core/java/android/util/base64/Base64OutputStream.java
Normal file
@@ -0,0 +1,153 @@
|
||||
/*
|
||||
* Copyright (C) 2010 The Android Open Source Project
|
||||
*
|
||||
* 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 android.util.base64;
|
||||
|
||||
import java.io.FilterOutputStream;
|
||||
import java.io.IOException;
|
||||
import java.io.OutputStream;
|
||||
|
||||
/**
|
||||
* An OutputStream that does either Base64 encoding or decoding on the
|
||||
* data written to it, writing the resulting data to another
|
||||
* OutputStream.
|
||||
*/
|
||||
public class Base64OutputStream extends FilterOutputStream {
|
||||
private final boolean encode;
|
||||
private final Base64.EncoderState estate;
|
||||
private final Base64.DecoderState dstate;
|
||||
private final int flags;
|
||||
|
||||
private byte[] buffer = null;
|
||||
private int bpos = 0;
|
||||
|
||||
private static byte[] EMPTY = new byte[0];
|
||||
|
||||
/**
|
||||
* Performs Base64 encoding on the data written to the stream,
|
||||
* writing the encoded data to another OutputStream.
|
||||
*
|
||||
* @param out the OutputStream to write the encoded data to
|
||||
* @param flags bit flags for controlling the encoder; see the
|
||||
* constants in {@link Base64}
|
||||
*/
|
||||
public Base64OutputStream(OutputStream out, int flags) {
|
||||
this(out, flags, true);
|
||||
}
|
||||
|
||||
/**
|
||||
* Performs Base64 encoding or decoding on the data written to the
|
||||
* stream, writing the encoded/decoded data to another
|
||||
* OutputStream.
|
||||
*
|
||||
* @param out the OutputStream to write the encoded data to
|
||||
* @param flags bit flags for controlling the encoder; see the
|
||||
* constants in {@link Base64}
|
||||
* @param encode true to encode, false to decode
|
||||
*/
|
||||
public Base64OutputStream(OutputStream out, int flags, boolean encode) {
|
||||
super(out);
|
||||
this.flags = flags;
|
||||
this.encode = encode;
|
||||
if (encode) {
|
||||
estate = new Base64.EncoderState(flags, null);
|
||||
dstate = null;
|
||||
} else {
|
||||
estate = null;
|
||||
dstate = new Base64.DecoderState(flags, null);
|
||||
}
|
||||
}
|
||||
|
||||
public void write(int b) throws IOException {
|
||||
// To avoid invoking the encoder/decoder routines for single
|
||||
// bytes, we buffer up calls to write(int) in an internal
|
||||
// byte array to transform them into writes of decently-sized
|
||||
// arrays.
|
||||
|
||||
if (buffer == null) {
|
||||
buffer = new byte[1024];
|
||||
}
|
||||
if (bpos >= buffer.length) {
|
||||
// internal buffer full; write it out.
|
||||
internalWrite(buffer, 0, bpos, false);
|
||||
bpos = 0;
|
||||
}
|
||||
buffer[bpos++] = (byte) b;
|
||||
}
|
||||
|
||||
/**
|
||||
* Flush any buffered data from calls to write(int). Needed
|
||||
* before doing a write(byte[], int, int) or a close().
|
||||
*/
|
||||
private void flushBuffer() throws IOException {
|
||||
if (bpos > 0) {
|
||||
internalWrite(buffer, 0, bpos, false);
|
||||
bpos = 0;
|
||||
}
|
||||
}
|
||||
|
||||
public void write(byte[] b, int off, int len) throws IOException {
|
||||
if (len <= 0) return;
|
||||
flushBuffer();
|
||||
internalWrite(b, off, len, false);
|
||||
}
|
||||
|
||||
public void close() throws IOException {
|
||||
flushBuffer();
|
||||
internalWrite(EMPTY, 0, 0, true);
|
||||
if ((flags & Base64.NO_CLOSE) == 0) {
|
||||
out.close();
|
||||
} else {
|
||||
out.flush();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Write the given bytes to the encoder/decoder.
|
||||
*
|
||||
* @param finish true if this is the last batch of input, to cause
|
||||
* encoder/decoder state to be finalized.
|
||||
*/
|
||||
private void internalWrite(byte[] b, int off, int len, boolean finish) throws IOException {
|
||||
if (encode) {
|
||||
// len*8/5+10 is an overestimate of the most bytes the
|
||||
// encoder can produce for len bytes of input.
|
||||
estate.output = embiggen(estate.output, len*8/5+10);
|
||||
Base64.encodeInternal(b, off, len, estate, finish);
|
||||
out.write(estate.output, 0, estate.op);
|
||||
} else {
|
||||
// len*3/4+10 is an overestimate of the most bytes the
|
||||
// decoder can produce for len bytes of input.
|
||||
dstate.output = embiggen(dstate.output, len*3/4+10);
|
||||
if (!Base64.decodeInternal(b, off, len, dstate, finish)) {
|
||||
throw new IOException("bad base-64");
|
||||
}
|
||||
out.write(dstate.output, 0, dstate.op);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* If b.length is at least len, return b. Otherwise return a new
|
||||
* byte array of length len.
|
||||
*/
|
||||
private byte[] embiggen(byte[] b, int len) {
|
||||
if (b == null || b.length < len) {
|
||||
return new byte[len];
|
||||
} else {
|
||||
return b;
|
||||
}
|
||||
}
|
||||
}
|
||||
520
core/tests/coretests/src/android/util/base64/Base64Test.java
Normal file
520
core/tests/coretests/src/android/util/base64/Base64Test.java
Normal file
@@ -0,0 +1,520 @@
|
||||
/*
|
||||
* Copyright (C) 2010 The Android Open Source Project
|
||||
*
|
||||
* 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 android.util.base64;
|
||||
|
||||
import junit.framework.TestCase;
|
||||
|
||||
import java.io.ByteArrayInputStream;
|
||||
import java.io.ByteArrayOutputStream;
|
||||
import java.util.Random;
|
||||
|
||||
public class Base64Test extends TestCase {
|
||||
private static final String TAG = "Base64Test";
|
||||
|
||||
/** Decodes a string, returning a string. */
|
||||
private String decodeString(String in) throws Exception {
|
||||
byte[] out = Base64.decode(in, 0);
|
||||
return new String(out);
|
||||
}
|
||||
|
||||
/**
|
||||
* Encodes the string 'in' using 'flags'. Asserts that decoding
|
||||
* gives the same string. Returns the encoded string.
|
||||
*/
|
||||
private String encodeToString(String in, int flags) throws Exception {
|
||||
String b64 = Base64.encodeToString(in.getBytes(), flags);
|
||||
String dec = decodeString(b64);
|
||||
assertEquals(in, dec);
|
||||
return b64;
|
||||
}
|
||||
|
||||
/** Assert that decoding 'in' throws IllegalArgumentException. */
|
||||
private void assertBad(String in) throws Exception {
|
||||
try {
|
||||
byte[] out = Base64.decode(in, 0);
|
||||
fail("should have failed to decode");
|
||||
} catch (IllegalArgumentException e) {
|
||||
}
|
||||
}
|
||||
|
||||
/** Assert that actual equals the first len bytes of expected. */
|
||||
private void assertEquals(byte[] expected, int len, byte[] actual) {
|
||||
assertEquals(len, actual.length);
|
||||
for (int i = 0; i < len; ++i) {
|
||||
assertEquals(expected[i], actual[i]);
|
||||
}
|
||||
}
|
||||
|
||||
/** Assert that actual equals the first len bytes of expected. */
|
||||
private void assertEquals(byte[] expected, int len, byte[] actual, int alen) {
|
||||
assertEquals(len, alen);
|
||||
for (int i = 0; i < len; ++i) {
|
||||
assertEquals(expected[i], actual[i]);
|
||||
}
|
||||
}
|
||||
|
||||
/** Assert that actual equals the first len bytes of expected. */
|
||||
private void assertEquals(byte[] expected, byte[] actual) {
|
||||
assertEquals(expected.length, actual.length);
|
||||
for (int i = 0; i < expected.length; ++i) {
|
||||
assertEquals(expected[i], actual[i]);
|
||||
}
|
||||
}
|
||||
|
||||
public void testDecodeExtraChars() throws Exception {
|
||||
// padding 0
|
||||
assertEquals("hello, world", decodeString("aGVsbG8sIHdvcmxk"));
|
||||
assertBad("aGVsbG8sIHdvcmxk=");
|
||||
assertBad("aGVsbG8sIHdvcmxk==");
|
||||
assertBad("aGVsbG8sIHdvcmxk =");
|
||||
assertBad("aGVsbG8sIHdvcmxk = = ");
|
||||
assertEquals("hello, world", decodeString(" aGVs bG8s IHdv cmxk "));
|
||||
assertEquals("hello, world", decodeString(" aGV sbG8 sIHd vcmx k "));
|
||||
assertEquals("hello, world", decodeString(" aG VsbG 8sIH dvcm xk "));
|
||||
assertEquals("hello, world", decodeString(" a GVsb G8sI Hdvc mxk "));
|
||||
assertEquals("hello, world", decodeString(" a G V s b G 8 s I H d v c m x k "));
|
||||
assertEquals("hello, world", decodeString("_a*G_V*s_b*G_8*s_I*H_d*v_c*m_x*k_"));
|
||||
assertEquals("hello, world", decodeString("aGVsbG8sIHdvcmxk"));
|
||||
|
||||
// padding 1
|
||||
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPyE="));
|
||||
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPyE"));
|
||||
assertBad("aGVsbG8sIHdvcmxkPyE==");
|
||||
assertBad("aGVsbG8sIHdvcmxkPyE ==");
|
||||
assertBad("aGVsbG8sIHdvcmxkPyE = = ");
|
||||
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E="));
|
||||
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E"));
|
||||
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E ="));
|
||||
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E "));
|
||||
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E = "));
|
||||
assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E "));
|
||||
|
||||
// padding 2
|
||||
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkLg=="));
|
||||
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkLg"));
|
||||
assertBad("aGVsbG8sIHdvcmxkLg=");
|
||||
assertBad("aGVsbG8sIHdvcmxkLg =");
|
||||
assertBad("aGVsbG8sIHdvcmxkLg = ");
|
||||
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g=="));
|
||||
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g"));
|
||||
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g =="));
|
||||
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g "));
|
||||
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g = = "));
|
||||
assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g "));
|
||||
}
|
||||
|
||||
private static final byte[] BYTES = { (byte) 0xff, (byte) 0xee, (byte) 0xdd,
|
||||
(byte) 0xcc, (byte) 0xbb, (byte) 0xaa,
|
||||
(byte) 0x99, (byte) 0x88, (byte) 0x77 };
|
||||
|
||||
public void testBinaryDecode() throws Exception {
|
||||
assertEquals(BYTES, 0, Base64.decode("", 0));
|
||||
assertEquals(BYTES, 1, Base64.decode("/w==", 0));
|
||||
assertEquals(BYTES, 2, Base64.decode("/+4=", 0));
|
||||
assertEquals(BYTES, 3, Base64.decode("/+7d", 0));
|
||||
assertEquals(BYTES, 4, Base64.decode("/+7dzA==", 0));
|
||||
assertEquals(BYTES, 5, Base64.decode("/+7dzLs=", 0));
|
||||
assertEquals(BYTES, 6, Base64.decode("/+7dzLuq", 0));
|
||||
assertEquals(BYTES, 7, Base64.decode("/+7dzLuqmQ==", 0));
|
||||
assertEquals(BYTES, 8, Base64.decode("/+7dzLuqmYg=", 0));
|
||||
}
|
||||
|
||||
public void testWebSafe() throws Exception {
|
||||
assertEquals(BYTES, 0, Base64.decode("", Base64.WEB_SAFE));
|
||||
assertEquals(BYTES, 1, Base64.decode("_w==", Base64.WEB_SAFE));
|
||||
assertEquals(BYTES, 2, Base64.decode("_-4=", Base64.WEB_SAFE));
|
||||
assertEquals(BYTES, 3, Base64.decode("_-7d", Base64.WEB_SAFE));
|
||||
assertEquals(BYTES, 4, Base64.decode("_-7dzA==", Base64.WEB_SAFE));
|
||||
assertEquals(BYTES, 5, Base64.decode("_-7dzLs=", Base64.WEB_SAFE));
|
||||
assertEquals(BYTES, 6, Base64.decode("_-7dzLuq", Base64.WEB_SAFE));
|
||||
assertEquals(BYTES, 7, Base64.decode("_-7dzLuqmQ==", Base64.WEB_SAFE));
|
||||
assertEquals(BYTES, 8, Base64.decode("_-7dzLuqmYg=", Base64.WEB_SAFE));
|
||||
|
||||
assertEquals("", Base64.encodeToString(BYTES, 0, 0, Base64.WEB_SAFE));
|
||||
assertEquals("_w==\n", Base64.encodeToString(BYTES, 0, 1, Base64.WEB_SAFE));
|
||||
assertEquals("_-4=\n", Base64.encodeToString(BYTES, 0, 2, Base64.WEB_SAFE));
|
||||
assertEquals("_-7d\n", Base64.encodeToString(BYTES, 0, 3, Base64.WEB_SAFE));
|
||||
assertEquals("_-7dzA==\n", Base64.encodeToString(BYTES, 0, 4, Base64.WEB_SAFE));
|
||||
assertEquals("_-7dzLs=\n", Base64.encodeToString(BYTES, 0, 5, Base64.WEB_SAFE));
|
||||
assertEquals("_-7dzLuq\n", Base64.encodeToString(BYTES, 0, 6, Base64.WEB_SAFE));
|
||||
assertEquals("_-7dzLuqmQ==\n", Base64.encodeToString(BYTES, 0, 7, Base64.WEB_SAFE));
|
||||
assertEquals("_-7dzLuqmYg=\n", Base64.encodeToString(BYTES, 0, 8, Base64.WEB_SAFE));
|
||||
}
|
||||
|
||||
public void testFlags() throws Exception {
|
||||
assertEquals("YQ==\n", encodeToString("a", 0));
|
||||
assertEquals("YQ==", encodeToString("a", Base64.NO_WRAP));
|
||||
assertEquals("YQ\n", encodeToString("a", Base64.NO_PADDING));
|
||||
assertEquals("YQ", encodeToString("a", Base64.NO_PADDING | Base64.NO_WRAP));
|
||||
assertEquals("YQ==\r\n", encodeToString("a", Base64.CRLF));
|
||||
assertEquals("YQ\r\n", encodeToString("a", Base64.CRLF | Base64.NO_PADDING));
|
||||
|
||||
assertEquals("YWI=\n", encodeToString("ab", 0));
|
||||
assertEquals("YWI=", encodeToString("ab", Base64.NO_WRAP));
|
||||
assertEquals("YWI\n", encodeToString("ab", Base64.NO_PADDING));
|
||||
assertEquals("YWI", encodeToString("ab", Base64.NO_PADDING | Base64.NO_WRAP));
|
||||
assertEquals("YWI=\r\n", encodeToString("ab", Base64.CRLF));
|
||||
assertEquals("YWI\r\n", encodeToString("ab", Base64.CRLF | Base64.NO_PADDING));
|
||||
|
||||
assertEquals("YWJj\n", encodeToString("abc", 0));
|
||||
assertEquals("YWJj", encodeToString("abc", Base64.NO_WRAP));
|
||||
assertEquals("YWJj\n", encodeToString("abc", Base64.NO_PADDING));
|
||||
assertEquals("YWJj", encodeToString("abc", Base64.NO_PADDING | Base64.NO_WRAP));
|
||||
assertEquals("YWJj\r\n", encodeToString("abc", Base64.CRLF));
|
||||
assertEquals("YWJj\r\n", encodeToString("abc", Base64.CRLF | Base64.NO_PADDING));
|
||||
|
||||
assertEquals("YWJjZA==\n", encodeToString("abcd", 0));
|
||||
assertEquals("YWJjZA==", encodeToString("abcd", Base64.NO_WRAP));
|
||||
assertEquals("YWJjZA\n", encodeToString("abcd", Base64.NO_PADDING));
|
||||
assertEquals("YWJjZA", encodeToString("abcd", Base64.NO_PADDING | Base64.NO_WRAP));
|
||||
assertEquals("YWJjZA==\r\n", encodeToString("abcd", Base64.CRLF));
|
||||
assertEquals("YWJjZA\r\n", encodeToString("abcd", Base64.CRLF | Base64.NO_PADDING));
|
||||
}
|
||||
|
||||
public void testLineLength() throws Exception {
|
||||
String in_56 = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd";
|
||||
String in_57 = in_56 + "e";
|
||||
String in_58 = in_56 + "ef";
|
||||
String in_59 = in_56 + "efg";
|
||||
String in_60 = in_56 + "efgh";
|
||||
String in_61 = in_56 + "efghi";
|
||||
|
||||
String prefix = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXphYmNkZWZnaGlqa2xtbm9wcXJzdHV2d3h5emFi";
|
||||
String out_56 = prefix + "Y2Q=\n";
|
||||
String out_57 = prefix + "Y2Rl\n";
|
||||
String out_58 = prefix + "Y2Rl\nZg==\n";
|
||||
String out_59 = prefix + "Y2Rl\nZmc=\n";
|
||||
String out_60 = prefix + "Y2Rl\nZmdo\n";
|
||||
String out_61 = prefix + "Y2Rl\nZmdoaQ==\n";
|
||||
|
||||
// no newline for an empty input array.
|
||||
assertEquals("", encodeToString("", 0));
|
||||
|
||||
assertEquals(out_56, encodeToString(in_56, 0));
|
||||
assertEquals(out_57, encodeToString(in_57, 0));
|
||||
assertEquals(out_58, encodeToString(in_58, 0));
|
||||
assertEquals(out_59, encodeToString(in_59, 0));
|
||||
assertEquals(out_60, encodeToString(in_60, 0));
|
||||
assertEquals(out_61, encodeToString(in_61, 0));
|
||||
|
||||
assertEquals(out_56.replaceAll("=", ""), encodeToString(in_56, Base64.NO_PADDING));
|
||||
assertEquals(out_57.replaceAll("=", ""), encodeToString(in_57, Base64.NO_PADDING));
|
||||
assertEquals(out_58.replaceAll("=", ""), encodeToString(in_58, Base64.NO_PADDING));
|
||||
assertEquals(out_59.replaceAll("=", ""), encodeToString(in_59, Base64.NO_PADDING));
|
||||
assertEquals(out_60.replaceAll("=", ""), encodeToString(in_60, Base64.NO_PADDING));
|
||||
assertEquals(out_61.replaceAll("=", ""), encodeToString(in_61, Base64.NO_PADDING));
|
||||
|
||||
assertEquals(out_56.replaceAll("\n", ""), encodeToString(in_56, Base64.NO_WRAP));
|
||||
assertEquals(out_57.replaceAll("\n", ""), encodeToString(in_57, Base64.NO_WRAP));
|
||||
assertEquals(out_58.replaceAll("\n", ""), encodeToString(in_58, Base64.NO_WRAP));
|
||||
assertEquals(out_59.replaceAll("\n", ""), encodeToString(in_59, Base64.NO_WRAP));
|
||||
assertEquals(out_60.replaceAll("\n", ""), encodeToString(in_60, Base64.NO_WRAP));
|
||||
assertEquals(out_61.replaceAll("\n", ""), encodeToString(in_61, Base64.NO_WRAP));
|
||||
}
|
||||
|
||||
/**
|
||||
* Tests that Base64.encodeInternal does correct handling of the
|
||||
* tail for each call.
|
||||
*
|
||||
* This test is disabled because while it passes if you can get it
|
||||
* to run, android's test infrastructure currently doesn't allow
|
||||
* us to get at package-private members (Base64.EncoderState in
|
||||
* this case).
|
||||
*/
|
||||
public void XXXtestEncodeInternal() throws Exception {
|
||||
byte[] input = { (byte) 0x61, (byte) 0x62, (byte) 0x63 };
|
||||
byte[] output = new byte[100];
|
||||
|
||||
Base64.EncoderState state = new Base64.EncoderState(Base64.NO_PADDING | Base64.NO_WRAP,
|
||||
output);
|
||||
|
||||
Base64.encodeInternal(input, 0, 3, state, false);
|
||||
assertEquals("YWJj".getBytes(), 4, state.output, state.op);
|
||||
assertEquals(0, state.tailLen);
|
||||
|
||||
Base64.encodeInternal(input, 0, 3, state, false);
|
||||
assertEquals("YWJj".getBytes(), 4, state.output, state.op);
|
||||
assertEquals(0, state.tailLen);
|
||||
|
||||
Base64.encodeInternal(input, 0, 1, state, false);
|
||||
assertEquals(0, state.op);
|
||||
assertEquals(1, state.tailLen);
|
||||
|
||||
Base64.encodeInternal(input, 0, 1, state, false);
|
||||
assertEquals(0, state.op);
|
||||
assertEquals(2, state.tailLen);
|
||||
|
||||
Base64.encodeInternal(input, 0, 1, state, false);
|
||||
assertEquals("YWFh".getBytes(), 4, state.output, state.op);
|
||||
assertEquals(0, state.tailLen);
|
||||
|
||||
Base64.encodeInternal(input, 0, 2, state, false);
|
||||
assertEquals(0, state.op);
|
||||
assertEquals(2, state.tailLen);
|
||||
|
||||
Base64.encodeInternal(input, 0, 2, state, false);
|
||||
assertEquals("YWJh".getBytes(), 4, state.output, state.op);
|
||||
assertEquals(1, state.tailLen);
|
||||
|
||||
Base64.encodeInternal(input, 0, 2, state, false);
|
||||
assertEquals("YmFi".getBytes(), 4, state.output, state.op);
|
||||
assertEquals(0, state.tailLen);
|
||||
|
||||
Base64.encodeInternal(input, 0, 1, state, true);
|
||||
assertEquals("YQ".getBytes(), 2, state.output, state.op);
|
||||
}
|
||||
|
||||
private static final String lipsum =
|
||||
"Lorem ipsum dolor sit amet, consectetur adipiscing elit. " +
|
||||
"Quisque congue eleifend odio, eu ornare nulla facilisis eget. " +
|
||||
"Integer eget elit diam, sit amet laoreet nibh. Quisque enim " +
|
||||
"urna, pharetra vitae consequat eget, adipiscing eu ante. " +
|
||||
"Aliquam venenatis arcu nec nibh imperdiet tempor. In id dui " +
|
||||
"eget lorem aliquam rutrum vel vitae eros. In placerat ornare " +
|
||||
"pretium. Curabitur non fringilla mi. Fusce ultricies, turpis " +
|
||||
"eu ultrices suscipit, ligula nisi consectetur eros, dapibus " +
|
||||
"aliquet dui sapien a turpis. Donec ultricies varius ligula, " +
|
||||
"ut hendrerit arcu malesuada at. Praesent sed elit pretium " +
|
||||
"eros luctus gravida. In ac dolor lorem. Cras condimentum " +
|
||||
"convallis elementum. Phasellus vel felis in nulla ultrices " +
|
||||
"venenatis. Nam non tortor non orci convallis convallis. " +
|
||||
"Nam tristique lacinia hendrerit. Pellentesque habitant morbi " +
|
||||
"tristique senectus et netus et malesuada fames ac turpis " +
|
||||
"egestas. Vivamus cursus, nibh eu imperdiet porta, magna " +
|
||||
"ipsum mollis mauris, sit amet fringilla mi nisl eu mi. " +
|
||||
"Phasellus posuere, leo at ultricies vehicula, massa risus " +
|
||||
"volutpat sapien, eu tincidunt diam ipsum eget nulla. Cras " +
|
||||
"molestie dapibus commodo. Ut vel tellus at massa gravida " +
|
||||
"semper non sed orci.";
|
||||
|
||||
public void testInputStream() throws Exception {
|
||||
int[] flagses = { Base64.DEFAULT,
|
||||
Base64.NO_PADDING,
|
||||
Base64.NO_WRAP,
|
||||
Base64.NO_PADDING | Base64.NO_WRAP,
|
||||
Base64.CRLF,
|
||||
Base64.WEB_SAFE };
|
||||
int[] writeLengths = { -10, -5, -1, 0, 1, 1, 2, 2, 3, 10, 100 };
|
||||
Random rng = new Random(32176L);
|
||||
|
||||
// Test input needs to be at least 2048 bytes to fill up the
|
||||
// read buffer of Base64InputStream.
|
||||
byte[] plain = (lipsum + lipsum + lipsum + lipsum + lipsum).getBytes();
|
||||
|
||||
for (int flags: flagses) {
|
||||
byte[] encoded = Base64.encode(plain, flags);
|
||||
|
||||
ByteArrayInputStream bais;
|
||||
Base64InputStream b64is;
|
||||
byte[] actual = new byte[plain.length * 2];
|
||||
int ap;
|
||||
int b;
|
||||
|
||||
// ----- test decoding ("encoded" -> "plain") -----
|
||||
|
||||
// read as much as it will give us in one chunk
|
||||
bais = new ByteArrayInputStream(encoded);
|
||||
b64is = new Base64InputStream(bais, flags);
|
||||
ap = 0;
|
||||
while ((b = b64is.read(actual, ap, actual.length-ap)) != -1) {
|
||||
ap += b;
|
||||
}
|
||||
assertEquals(actual, ap, plain);
|
||||
|
||||
// read individual bytes
|
||||
bais = new ByteArrayInputStream(encoded);
|
||||
b64is = new Base64InputStream(bais, flags);
|
||||
ap = 0;
|
||||
while ((b = b64is.read()) != -1) {
|
||||
actual[ap++] = (byte) b;
|
||||
}
|
||||
assertEquals(actual, ap, plain);
|
||||
|
||||
// mix reads of variously-sized arrays with one-byte reads
|
||||
bais = new ByteArrayInputStream(encoded);
|
||||
b64is = new Base64InputStream(bais, flags);
|
||||
ap = 0;
|
||||
readloop: while (true) {
|
||||
int l = writeLengths[rng.nextInt(writeLengths.length)];
|
||||
if (l >= 0) {
|
||||
b = b64is.read(actual, ap, l);
|
||||
if (b == -1) break readloop;
|
||||
ap += b;
|
||||
} else {
|
||||
for (int i = 0; i < -l; ++i) {
|
||||
if ((b = b64is.read()) == -1) break readloop;
|
||||
actual[ap++] = (byte) b;
|
||||
}
|
||||
}
|
||||
}
|
||||
assertEquals(actual, ap, plain);
|
||||
|
||||
// ----- test encoding ("plain" -> "encoded") -----
|
||||
|
||||
// read as much as it will give us in one chunk
|
||||
bais = new ByteArrayInputStream(plain);
|
||||
b64is = new Base64InputStream(bais, flags, true);
|
||||
ap = 0;
|
||||
while ((b = b64is.read(actual, ap, actual.length-ap)) != -1) {
|
||||
ap += b;
|
||||
}
|
||||
assertEquals(actual, ap, encoded);
|
||||
|
||||
// read individual bytes
|
||||
bais = new ByteArrayInputStream(plain);
|
||||
b64is = new Base64InputStream(bais, flags, true);
|
||||
ap = 0;
|
||||
while ((b = b64is.read()) != -1) {
|
||||
actual[ap++] = (byte) b;
|
||||
}
|
||||
assertEquals(actual, ap, encoded);
|
||||
|
||||
// mix reads of variously-sized arrays with one-byte reads
|
||||
bais = new ByteArrayInputStream(plain);
|
||||
b64is = new Base64InputStream(bais, flags, true);
|
||||
ap = 0;
|
||||
readloop: while (true) {
|
||||
int l = writeLengths[rng.nextInt(writeLengths.length)];
|
||||
if (l >= 0) {
|
||||
b = b64is.read(actual, ap, l);
|
||||
if (b == -1) break readloop;
|
||||
ap += b;
|
||||
} else {
|
||||
for (int i = 0; i < -l; ++i) {
|
||||
if ((b = b64is.read()) == -1) break readloop;
|
||||
actual[ap++] = (byte) b;
|
||||
}
|
||||
}
|
||||
}
|
||||
assertEquals(actual, ap, encoded);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Tests that Base64OutputStream produces exactly the same results
|
||||
* as calling Base64.encode/.decode on an in-memory array.
|
||||
*/
|
||||
public void testOutputStream() throws Exception {
|
||||
int[] flagses = { Base64.DEFAULT,
|
||||
Base64.NO_PADDING,
|
||||
Base64.NO_WRAP,
|
||||
Base64.NO_PADDING | Base64.NO_WRAP,
|
||||
Base64.CRLF,
|
||||
Base64.WEB_SAFE };
|
||||
int[] writeLengths = { -10, -5, -1, 0, 1, 1, 2, 2, 3, 10, 100 };
|
||||
Random rng = new Random(32176L);
|
||||
|
||||
// Test input needs to be at least 1024 bytes to test filling
|
||||
// up the write(int) buffer of Base64OutputStream.
|
||||
byte[] plain = (lipsum + lipsum).getBytes();
|
||||
|
||||
for (int flags: flagses) {
|
||||
byte[] encoded = Base64.encode(plain, flags);
|
||||
|
||||
ByteArrayOutputStream baos;
|
||||
Base64OutputStream b64os;
|
||||
byte[] actual;
|
||||
int p;
|
||||
|
||||
// ----- test encoding ("plain" -> "encoded") -----
|
||||
|
||||
// one large write(byte[]) of the whole input
|
||||
baos = new ByteArrayOutputStream();
|
||||
b64os = new Base64OutputStream(baos, flags);
|
||||
b64os.write(plain);
|
||||
b64os.close();
|
||||
actual = baos.toByteArray();
|
||||
assertEquals(encoded, actual);
|
||||
|
||||
// many calls to write(int)
|
||||
baos = new ByteArrayOutputStream();
|
||||
b64os = new Base64OutputStream(baos, flags);
|
||||
for (int i = 0; i < plain.length; ++i) {
|
||||
b64os.write(plain[i]);
|
||||
}
|
||||
b64os.close();
|
||||
actual = baos.toByteArray();
|
||||
assertEquals(encoded, actual);
|
||||
|
||||
// intermixed sequences of write(int) with
|
||||
// write(byte[],int,int) of various lengths.
|
||||
baos = new ByteArrayOutputStream();
|
||||
b64os = new Base64OutputStream(baos, flags);
|
||||
p = 0;
|
||||
while (p < plain.length) {
|
||||
int l = writeLengths[rng.nextInt(writeLengths.length)];
|
||||
l = Math.min(l, plain.length-p);
|
||||
if (l >= 0) {
|
||||
b64os.write(plain, p, l);
|
||||
p += l;
|
||||
} else {
|
||||
l = Math.min(-l, plain.length-p);
|
||||
for (int i = 0; i < l; ++i) {
|
||||
b64os.write(plain[p+i]);
|
||||
}
|
||||
p += l;
|
||||
}
|
||||
}
|
||||
b64os.close();
|
||||
actual = baos.toByteArray();
|
||||
assertEquals(encoded, actual);
|
||||
|
||||
// ----- test decoding ("encoded" -> "plain") -----
|
||||
|
||||
// one large write(byte[]) of the whole input
|
||||
baos = new ByteArrayOutputStream();
|
||||
b64os = new Base64OutputStream(baos, flags, false);
|
||||
b64os.write(encoded);
|
||||
b64os.close();
|
||||
actual = baos.toByteArray();
|
||||
assertEquals(plain, actual);
|
||||
|
||||
// many calls to write(int)
|
||||
baos = new ByteArrayOutputStream();
|
||||
b64os = new Base64OutputStream(baos, flags, false);
|
||||
for (int i = 0; i < encoded.length; ++i) {
|
||||
b64os.write(encoded[i]);
|
||||
}
|
||||
b64os.close();
|
||||
actual = baos.toByteArray();
|
||||
assertEquals(plain, actual);
|
||||
|
||||
// intermixed sequences of write(int) with
|
||||
// write(byte[],int,int) of various lengths.
|
||||
baos = new ByteArrayOutputStream();
|
||||
b64os = new Base64OutputStream(baos, flags, false);
|
||||
p = 0;
|
||||
while (p < encoded.length) {
|
||||
int l = writeLengths[rng.nextInt(writeLengths.length)];
|
||||
l = Math.min(l, encoded.length-p);
|
||||
if (l >= 0) {
|
||||
b64os.write(encoded, p, l);
|
||||
p += l;
|
||||
} else {
|
||||
l = Math.min(-l, encoded.length-p);
|
||||
for (int i = 0; i < l; ++i) {
|
||||
b64os.write(encoded[p+i]);
|
||||
}
|
||||
p += l;
|
||||
}
|
||||
}
|
||||
b64os.close();
|
||||
actual = baos.toByteArray();
|
||||
assertEquals(plain, actual);
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user