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40 ****************************************************************************/
41
42 #include <QByteArray>
43 #include <QtGlobal>
44
45 #include "qbuiltintypes_p.h"
46 #include "qvalidationerror_p.h"
47
48 #include "qbase64binary_p.h"
49
50 QT_BEGIN_NAMESPACE
51
52 using namespace QPatternist;
53
Base64Binary(const QByteArray & val)54 Base64Binary::Base64Binary(const QByteArray &val) : m_value(val)
55 {
56 }
57
58 const char Base64Binary::Base64DecMap[128] =
59 {
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, 0x00, 0x00, 0x00, 0x00, 0x00,
64 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
65 0x00, 0x00, 0x00, 0x3E, 0x00, 0x00, 0x00, 0x3F,
66 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
67 0x3C, 0x3D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
68 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
69 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
70 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
71 0x17, 0x18, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
72 0x00, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,
73 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
74 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,
75 0x31, 0x32, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00
76 };
77
base64Decode(const QByteArray & in,QByteArray & out,bool & ok)78 void Base64Binary::base64Decode(const QByteArray &in, QByteArray &out, bool &ok)
79 {
80 out.resize(0);
81
82 if(in.isEmpty())
83 {
84 ok = false;
85 return;
86 }
87
88 ok = true;
89 int len = in.size(), tail = len;
90 const char *const data = in.data();
91 unsigned int eqCount = 0;
92
93 // Find the tail end of the actual encoded data even if
94 // there is/are trailing CR and/or LF.
95 while(data[tail - 1] == '=')
96 {
97 --tail;
98 if(data[tail] != '=')
99 len = tail;
100 else
101 ++eqCount;
102 }
103
104 if(eqCount > 2)
105 {
106 ok = false;
107 return;
108 }
109
110 unsigned int outIdx = 0;
111 const int count = len; // We modify len below
112 out.resize((count));
113
114 for(int idx = 0; idx < count; ++idx)
115 {
116 const unsigned char ch = data[idx];
117 if((ch > 47 && ch < 58) ||
118 (ch > 64 && ch < 91) ||
119 (ch > 96 && ch < 123) ||
120 ch == '+' ||
121 ch == '/')
122 {
123 out[outIdx++] = Base64DecMap[ch];
124 }
125 else if(ch == '=')
126 {
127 if((idx + 1) == count || data[idx + 1] == '=')
128 {
129 out[++outIdx] = Base64DecMap[ch];
130 continue;
131 }
132
133 ok = false;
134 return;
135 }
136 else if(ch == ' ')
137 {
138 /* One space is ok, and the previously applied whitespace facet(not implemented
139 * at this time of writing) have ensured it's only one space, so we assume that. */
140 --tail;
141 --len;
142 continue;
143 }
144 else
145 {
146 ok = false;
147 return;
148 }
149 }
150
151 if(outIdx % 4 != 0)
152 {
153 ok = false;
154 return;
155 }
156
157 out.resize(len);
158
159 // 4-byte to 3-byte conversion
160 len = (tail > (len / 4)) ? tail - (len / 4) : 0;
161 int sidx = 0, didx = 0;
162 if(len > 1)
163 {
164 while(didx < len - 2)
165 {
166 out[didx] =(((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003));
167 out[didx + 1] =(((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017));
168 out[didx + 2] =(((out[sidx + 2] << 6) & 255) | (out[sidx + 3] & 077));
169 sidx += 4;
170 didx += 3;
171 }
172 }
173
174 if(didx < len)
175 out[didx] =(((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003));
176
177 if(++didx < len)
178 out[didx] =(((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017));
179
180 // Resize the output buffer
181 if(len == 0 || len < out.size())
182 out.resize(len);
183 }
184
fromLexical(const QString & str)185 AtomicValue::Ptr Base64Binary::fromLexical(const QString &str)
186 {
187 const QString simple(str.simplified());
188 if(simple.isEmpty())
189 return AtomicValue::Ptr(new Base64Binary(QByteArray()));
190
191 bool ok = false;
192 QByteArray result;
193 base64Decode(simple.toUtf8(), result, ok);
194
195 if(ok)
196 return AtomicValue::Ptr(new Base64Binary(result));
197 else
198 return ValidationError::createError();
199 }
200
fromValue(const QByteArray & data)201 Base64Binary::Ptr Base64Binary::fromValue(const QByteArray &data)
202 {
203 return Base64Binary::Ptr(new Base64Binary(data));
204 }
205
stringValue() const206 QString Base64Binary::stringValue() const
207 {
208 return QString::fromLatin1(m_value.toBase64().constData());
209 }
210
type() const211 ItemType::Ptr Base64Binary::type() const
212 {
213 return BuiltinTypes::xsBase64Binary;
214 }
215
216 QT_END_NAMESPACE
217