mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
364 lines
10 KiB
C++
364 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (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.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is the Netscape Portable Runtime (NSPR).
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998-2000
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Kyle Huey <me@kylehuey.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include "Base64.h"
|
|
|
|
#include "nsIInputStream.h"
|
|
#include "nsStringGlue.h"
|
|
|
|
#include "plbase64.h"
|
|
|
|
namespace {
|
|
|
|
// BEGIN base64 encode code copied and modified from NSPR
|
|
const unsigned char *base = (unsigned char *)"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
template <typename T>
|
|
static void
|
|
Encode3to4(const unsigned char *src, T *dest)
|
|
{
|
|
PRUint32 b32 = (PRUint32)0;
|
|
PRIntn i, j = 18;
|
|
|
|
for( i = 0; i < 3; i++ )
|
|
{
|
|
b32 <<= 8;
|
|
b32 |= (PRUint32)src[i];
|
|
}
|
|
|
|
for( i = 0; i < 4; i++ )
|
|
{
|
|
dest[i] = base[ (PRUint32)((b32>>j) & 0x3F) ];
|
|
j -= 6;
|
|
}
|
|
}
|
|
|
|
template <typename T>
|
|
static void
|
|
Encode2to4(const unsigned char *src, T *dest)
|
|
{
|
|
dest[0] = base[ (PRUint32)((src[0]>>2) & 0x3F) ];
|
|
dest[1] = base[ (PRUint32)(((src[0] & 0x03) << 4) | ((src[1] >> 4) & 0x0F)) ];
|
|
dest[2] = base[ (PRUint32)((src[1] & 0x0F) << 2) ];
|
|
dest[3] = (unsigned char)'=';
|
|
}
|
|
|
|
template <typename T>
|
|
static void
|
|
Encode1to4(const unsigned char *src, T *dest)
|
|
{
|
|
dest[0] = base[ (PRUint32)((src[0]>>2) & 0x3F) ];
|
|
dest[1] = base[ (PRUint32)((src[0] & 0x03) << 4) ];
|
|
dest[2] = (unsigned char)'=';
|
|
dest[3] = (unsigned char)'=';
|
|
}
|
|
|
|
template <typename T>
|
|
static void
|
|
Encode(const unsigned char *src, PRUint32 srclen, T *dest)
|
|
{
|
|
while( srclen >= 3 )
|
|
{
|
|
Encode3to4(src, dest);
|
|
src += 3;
|
|
dest += 4;
|
|
srclen -= 3;
|
|
}
|
|
|
|
switch( srclen )
|
|
{
|
|
case 2:
|
|
Encode2to4(src, dest);
|
|
break;
|
|
case 1:
|
|
Encode1to4(src, dest);
|
|
break;
|
|
case 0:
|
|
break;
|
|
default:
|
|
NS_NOTREACHED("coding error");
|
|
}
|
|
}
|
|
|
|
// END base64 encode code copied and modified from NSPR.
|
|
|
|
template <typename T>
|
|
struct EncodeInputStream_State {
|
|
unsigned char c[3];
|
|
PRUint8 charsOnStack;
|
|
typename T::char_type* buffer;
|
|
};
|
|
|
|
template <typename T>
|
|
NS_METHOD
|
|
EncodeInputStream_Encoder(nsIInputStream *aStream,
|
|
void *aClosure,
|
|
const char *aFromSegment,
|
|
PRUint32 aToOffset,
|
|
PRUint32 aCount,
|
|
PRUint32 *aWriteCount)
|
|
{
|
|
NS_ASSERTION(aCount > 0, "Er, what?");
|
|
|
|
EncodeInputStream_State<T>* state =
|
|
static_cast<EncodeInputStream_State<T>*>(aClosure);
|
|
|
|
// If we have any data left from last time, encode it now.
|
|
PRUint32 countRemaining = aCount;
|
|
const unsigned char *src = (const unsigned char*)aFromSegment;
|
|
if (state->charsOnStack) {
|
|
unsigned char firstSet[4];
|
|
if (state->charsOnStack == 1) {
|
|
firstSet[0] = state->c[0];
|
|
firstSet[1] = src[0];
|
|
firstSet[2] = (countRemaining > 1) ? src[1] : '\0';
|
|
firstSet[3] = '\0';
|
|
} else /* state->charsOnStack == 2 */ {
|
|
firstSet[0] = state->c[0];
|
|
firstSet[1] = state->c[1];
|
|
firstSet[2] = src[0];
|
|
firstSet[3] = '\0';
|
|
}
|
|
Encode(firstSet, 3, state->buffer);
|
|
state->buffer += 4;
|
|
countRemaining -= (3 - state->charsOnStack);
|
|
src += (3 - state->charsOnStack);
|
|
state->charsOnStack = 0;
|
|
}
|
|
|
|
// Encode the bulk of the
|
|
PRUint32 encodeLength = countRemaining - countRemaining % 3;
|
|
NS_ABORT_IF_FALSE(encodeLength % 3 == 0,
|
|
"Should have an exact number of triplets!");
|
|
Encode(src, encodeLength, state->buffer);
|
|
state->buffer += (encodeLength / 3) * 4;
|
|
src += encodeLength;
|
|
countRemaining -= encodeLength;
|
|
|
|
// We must consume all data, so if there's some data left stash it
|
|
*aWriteCount = aCount;
|
|
|
|
if (countRemaining) {
|
|
// We should never have a full triplet left at this point.
|
|
NS_ABORT_IF_FALSE(countRemaining < 3, "We should have encoded more!");
|
|
state->c[0] = src[0];
|
|
state->c[1] = (countRemaining == 2) ? src[1] : '\0';
|
|
state->charsOnStack = countRemaining;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
template <typename T>
|
|
nsresult
|
|
EncodeInputStream(nsIInputStream *aInputStream,
|
|
T &aDest,
|
|
PRUint32 aCount,
|
|
PRUint32 aOffset)
|
|
{
|
|
nsresult rv;
|
|
|
|
if (!aCount) {
|
|
rv = aInputStream->Available(&aCount);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
PRUint64 countlong =
|
|
(PRUint64(aCount) + 2) / 3 * 4; // +2 due to integer math.
|
|
if (countlong + aOffset > PR_UINT32_MAX)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
PRUint32 count = PRUint32(countlong);
|
|
|
|
aDest.SetLength(count + aOffset);
|
|
if (aDest.Length() != count + aOffset)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
EncodeInputStream_State<T> state;
|
|
state.charsOnStack = 0;
|
|
state.c[2] = '\0';
|
|
state.buffer = aOffset + aDest.BeginWriting();
|
|
|
|
while (1) {
|
|
PRUint32 read = 0;
|
|
|
|
rv = aInputStream->ReadSegments(&EncodeInputStream_Encoder<T>,
|
|
(void*)&state,
|
|
aCount,
|
|
&read);
|
|
if (NS_FAILED(rv)) {
|
|
if (rv == NS_BASE_STREAM_WOULD_BLOCK)
|
|
NS_RUNTIMEABORT("Not implemented for async streams!");
|
|
if (rv == NS_ERROR_NOT_IMPLEMENTED)
|
|
NS_RUNTIMEABORT("Requires a stream that implements ReadSegments!");
|
|
return rv;
|
|
}
|
|
|
|
if (!read)
|
|
break;
|
|
}
|
|
|
|
// Finish encoding if anything is left
|
|
if (state.charsOnStack)
|
|
Encode(state.c, state.charsOnStack, state.buffer);
|
|
|
|
*aDest.EndWriting() = '\0';
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace (anonymous)
|
|
|
|
namespace mozilla {
|
|
|
|
nsresult
|
|
Base64EncodeInputStream(nsIInputStream *aInputStream,
|
|
nsACString &aDest,
|
|
PRUint32 aCount,
|
|
PRUint32 aOffset)
|
|
{
|
|
return EncodeInputStream<nsACString>(aInputStream, aDest, aCount, aOffset);
|
|
}
|
|
|
|
nsresult
|
|
Base64EncodeInputStream(nsIInputStream *aInputStream,
|
|
nsAString &aDest,
|
|
PRUint32 aCount,
|
|
PRUint32 aOffset)
|
|
{
|
|
return EncodeInputStream<nsAString>(aInputStream, aDest, aCount, aOffset);
|
|
}
|
|
|
|
nsresult
|
|
Base64Encode(const nsACString &aBinaryData, nsACString &aString)
|
|
{
|
|
// Check for overflow.
|
|
if (aBinaryData.Length() > (PR_UINT32_MAX / 4) * 3) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
PRUint32 stringLen = ((aBinaryData.Length() + 2) / 3) * 4;
|
|
|
|
char *buffer;
|
|
|
|
// Add one byte for null termination.
|
|
if (aString.SetCapacity(stringLen + 1) &&
|
|
(buffer = aString.BeginWriting()) &&
|
|
PL_Base64Encode(aBinaryData.BeginReading(), aBinaryData.Length(), buffer)) {
|
|
// PL_Base64Encode doesn't null terminate the buffer for us when we pass
|
|
// the buffer in. Do that manually.
|
|
buffer[stringLen] = '\0';
|
|
|
|
aString.SetLength(stringLen);
|
|
return NS_OK;
|
|
}
|
|
|
|
aString.Truncate();
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
nsresult
|
|
Base64Encode(const nsAString &aString, nsAString &aBinaryData)
|
|
{
|
|
NS_LossyConvertUTF16toASCII string(aString);
|
|
nsCAutoString binaryData;
|
|
|
|
nsresult rv = Base64Encode(string, binaryData);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
CopyASCIItoUTF16(binaryData, aBinaryData);
|
|
} else {
|
|
aBinaryData.Truncate();
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
Base64Decode(const nsACString &aString, nsACString &aBinaryData)
|
|
{
|
|
// Check for overflow.
|
|
if (aString.Length() > PR_UINT32_MAX / 3) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
PRUint32 binaryDataLen = ((aString.Length() * 3) / 4);
|
|
|
|
char *buffer;
|
|
|
|
// Add one byte for null termination.
|
|
if (aBinaryData.SetCapacity(binaryDataLen + 1) &&
|
|
(buffer = aBinaryData.BeginWriting()) &&
|
|
PL_Base64Decode(aString.BeginReading(), aString.Length(), buffer)) {
|
|
// PL_Base64Decode doesn't null terminate the buffer for us when we pass
|
|
// the buffer in. Do that manually, taking into account the number of '='
|
|
// characters we were passed.
|
|
if (!aString.IsEmpty() && aString[aString.Length() - 1] == '=') {
|
|
if (aString.Length() > 1 && aString[aString.Length() - 2] == '=') {
|
|
binaryDataLen -= 2;
|
|
} else {
|
|
binaryDataLen -= 1;
|
|
}
|
|
}
|
|
buffer[binaryDataLen] = '\0';
|
|
|
|
aBinaryData.SetLength(binaryDataLen);
|
|
return NS_OK;
|
|
}
|
|
|
|
aBinaryData.Truncate();
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
nsresult
|
|
Base64Decode(const nsAString &aBinaryData, nsAString &aString)
|
|
{
|
|
NS_LossyConvertUTF16toASCII binaryData(aBinaryData);
|
|
nsCAutoString string;
|
|
|
|
nsresult rv = Base64Decode(binaryData, string);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
CopyASCIItoUTF16(string, aString);
|
|
} else {
|
|
aString.Truncate();
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
} // namespace mozilla
|