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39
40#include <QByteArray>
41#include <QtGlobal>
42
43#include "qbuiltintypes_p.h"
44#include "qvalidationerror_p.h"
45
46#include "qbase64binary_p.h"
47
48QT_BEGIN_NAMESPACE
49
50using namespace QPatternist;
51
52Base64Binary::Base64Binary(const QByteArray &val) : m_value(val)
53{
54}
55
56const char Base64Binary::Base64DecMap[128] =
57{
58 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
59 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
60 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
61 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
62 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
63 0x00, 0x00, 0x00, 0x3E, 0x00, 0x00, 0x00, 0x3F,
64 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
65 0x3C, 0x3D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
66 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
67 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
68 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
69 0x17, 0x18, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
70 0x00, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,
71 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
72 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,
73 0x31, 0x32, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00
74};
75
76void Base64Binary::base64Decode(const QByteArray &in, QByteArray &out, bool &ok)
77{
78 out.resize(size: 0);
79
80 if(in.isEmpty())
81 {
82 ok = false;
83 return;
84 }
85
86 ok = true;
87 int len = in.size(), tail = len;
88 const char *const data = in.data();
89 unsigned int eqCount = 0;
90
91 // Find the tail end of the actual encoded data even if
92 // there is/are trailing CR and/or LF.
93 while(data[tail - 1] == '=')
94 {
95 --tail;
96 if(data[tail] != '=')
97 len = tail;
98 else
99 ++eqCount;
100 }
101
102 if(eqCount > 2)
103 {
104 ok = false;
105 return;
106 }
107
108 unsigned int outIdx = 0;
109 const int count = len; // We modify len below
110 out.resize(size: (count));
111
112 for(int idx = 0; idx < count; ++idx)
113 {
114 const unsigned char ch = data[idx];
115 if((ch > 47 && ch < 58) ||
116 (ch > 64 && ch < 91) ||
117 (ch > 96 && ch < 123) ||
118 ch == '+' ||
119 ch == '/')
120 {
121 out[outIdx++] = Base64DecMap[ch];
122 }
123 else if(ch == '=')
124 {
125 if((idx + 1) == count || data[idx + 1] == '=')
126 {
127 out[++outIdx] = Base64DecMap[ch];
128 continue;
129 }
130
131 ok = false;
132 return;
133 }
134 else if(ch == ' ')
135 {
136 /* One space is ok, and the previously applied whitespace facet(not implemented
137 * at this time of writing) have ensured it's only one space, so we assume that. */
138 --tail;
139 --len;
140 continue;
141 }
142 else
143 {
144 ok = false;
145 return;
146 }
147 }
148
149 if(outIdx % 4 != 0)
150 {
151 ok = false;
152 return;
153 }
154
155 out.resize(size: len);
156
157 // 4-byte to 3-byte conversion
158 len = (tail > (len / 4)) ? tail - (len / 4) : 0;
159 int sidx = 0, didx = 0;
160 if(len > 1)
161 {
162 while(didx < len - 2)
163 {
164 out[didx] =(((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003));
165 out[didx + 1] =(((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017));
166 out[didx + 2] =(((out[sidx + 2] << 6) & 255) | (out[sidx + 3] & 077));
167 sidx += 4;
168 didx += 3;
169 }
170 }
171
172 if(didx < len)
173 out[didx] =(((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003));
174
175 if(++didx < len)
176 out[didx] =(((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017));
177
178 // Resize the output buffer
179 if(len == 0 || len < out.size())
180 out.resize(size: len);
181}
182
183AtomicValue::Ptr Base64Binary::fromLexical(const QString &str)
184{
185 const QString simple(str.simplified());
186 if(simple.isEmpty())
187 return AtomicValue::Ptr(new Base64Binary(QByteArray()));
188
189 bool ok = false;
190 QByteArray result;
191 base64Decode(in: simple.toUtf8(), out&: result, ok);
192
193 if(ok)
194 return AtomicValue::Ptr(new Base64Binary(result));
195 else
196 return ValidationError::createError();
197}
198
199Base64Binary::Ptr Base64Binary::fromValue(const QByteArray &data)
200{
201 return Base64Binary::Ptr(new Base64Binary(data));
202}
203
204QString Base64Binary::stringValue() const
205{
206 return QString::fromLatin1(str: m_value.toBase64().constData());
207}
208
209ItemType::Ptr Base64Binary::type() const
210{
211 return BuiltinTypes::xsBase64Binary;
212}
213
214QT_END_NAMESPACE
215

source code of qtxmlpatterns/src/xmlpatterns/data/qbase64binary.cpp