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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#include <QByteArray>
#include <QtGlobal>
#include "qbuiltintypes_p.h"
#include "qvalidationerror_p.h"
#include "qbase64binary_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
Base64Binary::Base64Binary(const QByteArray &val) : m_value(val)
{
}
const char Base64Binary::Base64DecMap[128] =
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x3E, 0x00, 0x00, 0x00, 0x3F,
0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
0x3C, 0x3D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
0x17, 0x18, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,
0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,
0x31, 0x32, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00
};
void Base64Binary::base64Decode(const QByteArray &in, QByteArray &out, bool &ok)
{
out.resize(0);
if(in.isEmpty())
{
ok = false;
return;
}
ok = true;
int len = in.size(), tail = len;
const char *const data = in.data();
unsigned int eqCount = 0;
// Find the tail end of the actual encoded data even if
// there is/are trailing CR and/or LF.
while(data[tail - 1] == '=')
{
--tail;
if(data[tail] != '=')
len = tail;
else
++eqCount;
}
if(eqCount > 2)
{
ok = false;
return;
}
unsigned int outIdx = 0;
const int count = len; // We modify len below
out.resize((count));
for(int idx = 0; idx < count; ++idx)
{
const unsigned char ch = data[idx];
if((ch > 47 && ch < 58) ||
(ch > 64 && ch < 91) ||
(ch > 96 && ch < 123) ||
ch == '+' ||
ch == '/')
{
out[outIdx++] = Base64DecMap[ch];
}
else if(ch == '=')
{
if((idx + 1) == count || data[idx + 1] == '=')
{
out[++outIdx] = Base64DecMap[ch];
continue;
}
ok = false;
return;
}
else if(ch == ' ')
{
/* One space is ok, and the previously applied whitespace facet(not implemented
* at this time of writing) have ensured it's only one space, so we assume that. */
--tail;
--len;
continue;
}
else
{
ok = false;
return;
}
}
if(outIdx % 4 != 0)
{
ok = false;
return;
}
out.resize(len);
// 4-byte to 3-byte conversion
len = (tail > (len / 4)) ? tail - (len / 4) : 0;
int sidx = 0, didx = 0;
if(len > 1)
{
while(didx < len - 2)
{
out[didx] =(((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003));
out[didx + 1] =(((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017));
out[didx + 2] =(((out[sidx + 2] << 6) & 255) | (out[sidx + 3] & 077));
sidx += 4;
didx += 3;
}
}
if(didx < len)
out[didx] =(((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003));
if(++didx < len)
out[didx] =(((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017));
// Resize the output buffer
if(len == 0 || len < out.size())
out.resize(len);
}
AtomicValue::Ptr Base64Binary::fromLexical(const QString &str)
{
const QString simple(str.simplified());
if(simple.isEmpty())
return AtomicValue::Ptr(new Base64Binary(QByteArray()));
bool ok = false;
QByteArray result;
base64Decode(simple.toUtf8(), result, ok);
if(ok)
return AtomicValue::Ptr(new Base64Binary(result));
else
return ValidationError::createError();
}
Base64Binary::Ptr Base64Binary::fromValue(const QByteArray &data)
{
return Base64Binary::Ptr(new Base64Binary(data));
}
QString Base64Binary::stringValue() const
{
return QString::fromLatin1(m_value.toBase64().constData());
}
ItemType::Ptr Base64Binary::type() const
{
return BuiltinTypes::xsBase64Binary;
}
QT_END_NAMESPACE
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