author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 11 May 2010 17:13:44 +0300 | |
branch | RCL_3 |
changeset 70 | 8bfb9186a8b8 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/* |
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Copyright (C) 2000-2001 Dawit Alemayehu <adawit@kde.org> |
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Copyright (C) 2006 Alexey Proskuryakov <ap@webkit.org> |
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Copyright (C) 2007 Apple Inc. All rights reserved. |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License (LGPL) |
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version 2 as published by the Free Software Foundation. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU Library General Public |
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License along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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|
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This code is based on the java implementation in HTTPClient |
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package by Ronald Tschalär Copyright (C) 1996-1999. |
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*/ |
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#include "config.h" |
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#include "Base64.h" |
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#include <limits.h> |
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|
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#include <wtf/Platform.h> |
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#include <wtf/StringExtras.h> |
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namespace WebCore { |
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|
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static const char base64EncMap[64] = { |
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0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, |
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0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, |
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0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, |
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0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, |
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0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, |
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0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, |
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0x77, 0x78, 0x79, 0x7A, 0x30, 0x31, 0x32, 0x33, |
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0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x2B, 0x2F |
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}; |
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|
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static const char base64DecMap[128] = { |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x3E, 0x00, 0x00, 0x00, 0x3F, |
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0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, |
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0x3C, 0x3D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, |
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0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, |
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0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, |
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0x17, 0x18, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, |
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0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, |
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0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, |
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0x31, 0x32, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00 |
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}; |
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|
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void base64Encode(const Vector<char>& in, Vector<char>& out, bool insertLFs) |
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{ |
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out.clear(); |
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if (in.isEmpty()) |
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return; |
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|
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// If the input string is pathologically large, just return nothing. |
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// Note: Keep this in sync with the "out_len" computation below. |
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// Rather than being perfectly precise, this is a bit conservative. |
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const unsigned maxInputBufferSize = UINT_MAX / 77 * 76 / 4 * 3 - 2; |
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if (in.size() > maxInputBufferSize) |
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return; |
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|
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unsigned sidx = 0; |
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unsigned didx = 0; |
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const char* data = in.data(); |
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const unsigned len = in.size(); |
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|
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unsigned out_len = ((len + 2) / 3) * 4; |
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|
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// Deal with the 76 character per line limit specified in RFC 2045. |
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insertLFs = (insertLFs && out_len > 76); |
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if (insertLFs) |
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out_len += ((out_len - 1) / 76); |
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87 |
|
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int count = 0; |
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out.resize(out_len); |
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|
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// 3-byte to 4-byte conversion + 0-63 to ascii printable conversion |
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if (len > 1) { |
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while (sidx < len - 2) { |
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if (insertLFs) { |
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if (count && (count % 76) == 0) |
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out[didx++] = '\n'; |
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count += 4; |
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} |
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out[didx++] = base64EncMap[(data[sidx] >> 2) & 077]; |
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|
100 |
out[didx++] = base64EncMap[(data[sidx + 1] >> 4) & 017 | (data[sidx] << 4) & 077]; |
dd21522fd290
Revision: 200911
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|
101 |
out[didx++] = base64EncMap[(data[sidx + 2] >> 6) & 003 | (data[sidx + 1] << 2) & 077]; |
dd21522fd290
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|
102 |
out[didx++] = base64EncMap[data[sidx + 2] & 077]; |
dd21522fd290
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|
103 |
sidx += 3; |
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|
104 |
} |
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|
105 |
} |
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|
106 |
|
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|
107 |
if (sidx < len) { |
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|
108 |
if (insertLFs && (count > 0) && (count % 76) == 0) |
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Revision: 200911
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|
109 |
out[didx++] = '\n'; |
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Revision: 200911
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|
110 |
|
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|
111 |
out[didx++] = base64EncMap[(data[sidx] >> 2) & 077]; |
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|
112 |
if (sidx < len - 1) { |
dd21522fd290
Revision: 200911
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|
113 |
out[didx++] = base64EncMap[(data[sidx + 1] >> 4) & 017 | (data[sidx] << 4) & 077]; |
dd21522fd290
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|
114 |
out[didx++] = base64EncMap[(data[sidx + 1] << 2) & 077]; |
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|
115 |
} else |
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116 |
out[didx++] = base64EncMap[(data[sidx] << 4) & 077]; |
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|
117 |
} |
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118 |
|
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119 |
// Add padding |
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120 |
while (didx < out.size()) { |
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121 |
out[didx] = '='; |
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122 |
didx++; |
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123 |
} |
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124 |
} |
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125 |
|
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126 |
bool base64Decode(const Vector<char>& in, Vector<char>& out) |
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127 |
{ |
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128 |
out.clear(); |
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129 |
if (in.isEmpty()) |
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130 |
return true; |
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131 |
|
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132 |
// If the input string is pathologically large, just return nothing. |
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133 |
if (in.size() > UINT_MAX) |
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134 |
return false; |
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135 |
|
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136 |
unsigned len = in.size(); |
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137 |
const char* data = in.data(); |
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138 |
|
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139 |
while (len && data[len-1] == '=') |
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140 |
--len; |
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141 |
|
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142 |
out.resize(len); |
dd21522fd290
Revision: 200911
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143 |
for (unsigned idx = 0; idx < len; idx++) { |
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Revision: 200911
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144 |
unsigned char ch = data[idx]; |
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Revision: 200911
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145 |
if ((ch > 47 && ch < 58) || (ch > 64 && ch < 91) || (ch > 96 && ch < 123) || ch == '+' || ch == '/' || ch == '=') |
dd21522fd290
Revision: 200911
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146 |
out[idx] = base64DecMap[ch]; |
dd21522fd290
Revision: 200911
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147 |
else |
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Revision: 200911
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148 |
return false; |
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Revision: 200911
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149 |
} |
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|
150 |
|
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151 |
// 4-byte to 3-byte conversion |
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Revision: 200911
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152 |
unsigned outLen = len - ((len + 3) / 4); |
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Revision: 200911
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153 |
if (!outLen || ((outLen + 2) / 3) * 4 < len) |
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|
154 |
return false; |
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Revision: 200911
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|
155 |
|
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|
156 |
unsigned sidx = 0; |
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Revision: 200911
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|
157 |
unsigned didx = 0; |
dd21522fd290
Revision: 200911
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|
158 |
if (outLen > 1) { |
dd21522fd290
Revision: 200911
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parents:
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|
159 |
while (didx < outLen - 2) { |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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|
160 |
out[didx] = (((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003)); |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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|
161 |
out[didx + 1] = (((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017)); |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
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|
162 |
out[didx + 2] = (((out[sidx + 2] << 6) & 255) | (out[sidx + 3] & 077)); |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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|
163 |
sidx += 4; |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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|
164 |
didx += 3; |
dd21522fd290
Revision: 200911
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parents:
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|
165 |
} |
dd21522fd290
Revision: 200911
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parents:
diff
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|
166 |
} |
dd21522fd290
Revision: 200911
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parents:
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|
167 |
|
dd21522fd290
Revision: 200911
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parents:
diff
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|
168 |
if (didx < outLen) |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
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|
169 |
out[didx] = (((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003)); |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
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|
170 |
|
dd21522fd290
Revision: 200911
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parents:
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|
171 |
if (++didx < outLen) |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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|
172 |
out[didx] = (((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017)); |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
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|
173 |
|
dd21522fd290
Revision: 200911
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|
174 |
if (outLen < out.size()) |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
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|
175 |
out.resize(outLen); |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
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|
176 |
|
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
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|
177 |
return true; |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
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|
178 |
} |
dd21522fd290
Revision: 200911
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parents:
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|
179 |
|
dd21522fd290
Revision: 200911
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parents:
diff
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|
180 |
} |