1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_package.hxx"
#include "Base64Codec.hxx"
#include <rtl/ustrbuf.hxx>
#include <osl/diagnose.h>
using namespace osl;
using namespace com::sun::star;
using ::rtl::OUStringBuffer;
const
sal_Char aBase64EncodeTable[] =
{ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' };
const
sal_uInt8 aBase64DecodeTable[] =
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0-15
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16-31
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0, 63, // 32-47
// + /
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 0, 0, 0, // 48-63
// 0 1 2 3 4 5 6 7 8 9 =
0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, // 64-79
// A B C D E F G H I J K L M N O
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 0, // 80-95
// P Q R S T U V W X Y Z
0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, // 96-111
// a b c d e f g h i j k l m n o
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 0, 0, 0, 0, 0, // 112-127
// p q r s t u v w x y z
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
void ThreeByteToFourByte (const sal_uInt8* pBuffer, const sal_Int32 nStart, const sal_Int32 nFullLen, rtl::OUStringBuffer& sBuffer)
{
sal_Int32 nLen(nFullLen - nStart);
if (nLen > 3)
nLen = 3;
if (nLen == 0)
{
sBuffer.setLength(0);
return;
}
sal_Int32 nBinaer;
switch (nLen)
{
case 1:
{
nBinaer = ((sal_uInt8)pBuffer[nStart + 0]) << 16;
}
break;
case 2:
{
nBinaer = (((sal_uInt8)pBuffer[nStart + 0]) << 16) +
(((sal_uInt8)pBuffer[nStart + 1]) << 8);
}
break;
default:
{
nBinaer = (((sal_uInt8)pBuffer[nStart + 0]) << 16) +
(((sal_uInt8)pBuffer[nStart + 1]) << 8) +
((sal_uInt8)pBuffer[nStart + 2]);
}
break;
}
sBuffer.appendAscii("====");
sal_uInt8 nIndex = static_cast< sal_uInt8 >((nBinaer & 0xFC0000) >> 18);
sBuffer.setCharAt(0, aBase64EncodeTable [nIndex]);
nIndex = static_cast< sal_uInt8 >((nBinaer & 0x3F000) >> 12);
sBuffer.setCharAt(1, aBase64EncodeTable [nIndex]);
if (nLen == 1)
return;
nIndex = static_cast< sal_uInt8 >((nBinaer & 0xFC0) >> 6);
sBuffer.setCharAt(2, aBase64EncodeTable [nIndex]);
if (nLen == 2)
return;
nIndex = static_cast< sal_uInt8 >(nBinaer & 0x3F);
sBuffer.setCharAt(3, aBase64EncodeTable [nIndex]);
}
void Base64Codec::encodeBase64(rtl::OUStringBuffer& aStrBuffer, const uno::Sequence < sal_Int8 >& aPass)
{
sal_Int32 i(0);
sal_Int32 nBufferLength(aPass.getLength());
const sal_uInt8* pBuffer = reinterpret_cast< const sal_uInt8* >( aPass.getConstArray() );
while (i < nBufferLength)
{
rtl::OUStringBuffer sBuffer;
ThreeByteToFourByte (pBuffer, i, nBufferLength, sBuffer);
aStrBuffer.append(sBuffer);
i += 3;
}
}
const rtl::OUString s2equal(RTL_CONSTASCII_USTRINGPARAM("=="));
const rtl::OUString s1equal(RTL_CONSTASCII_USTRINGPARAM("="));
void FourByteToThreeByte (sal_uInt8* pBuffer, sal_Int32& nLength, const sal_Int32 nStart, const rtl::OUString& sString)
{
nLength = 0;
sal_Int32 nLen (sString.getLength());
OSL_ASSERT( nLen == 4 );
if (nLen != 4)
return;
if (sString.indexOf(s2equal) == 2)
nLength = 1;
else if (sString.indexOf(s1equal) == 3)
nLength = 2;
else
nLength = 3;
sal_Int32 nBinaer ((aBase64DecodeTable [sString [0]] << 18) +
(aBase64DecodeTable [sString [1]] << 12) +
(aBase64DecodeTable [sString [2]] << 6) +
(aBase64DecodeTable [sString [3]]));
sal_uInt8 OneByte = static_cast< sal_uInt8 >((nBinaer & 0xFF0000) >> 16);
pBuffer[nStart + 0] = (sal_uInt8)OneByte;
if (nLength == 1)
return;
OneByte = static_cast< sal_uInt8 >((nBinaer & 0xFF00) >> 8);
pBuffer[nStart + 1] = OneByte;
if (nLength == 2)
return;
OneByte = static_cast< sal_uInt8 >(nBinaer & 0xFF);
pBuffer[nStart + 2] = OneByte;
}
void Base64Codec::decodeBase64(uno::Sequence< sal_Int8 >& aBuffer, const rtl::OUString& sBuffer)
{
sal_Int32 nFirstLength((sBuffer.getLength() / 4) * 3);
sal_uInt8* pBuffer = new sal_uInt8[nFirstLength];
sal_Int32 nSecondLength(0);
sal_Int32 nLength(0);
sal_Int32 i = 0;
sal_Int32 k = 0;
while (i < sBuffer.getLength())
{
FourByteToThreeByte (pBuffer, nLength, k, sBuffer.copy(i, 4));
nSecondLength += nLength;
nLength = 0;
i += 4;
k += 3;
}
aBuffer = uno::Sequence<sal_Int8>( reinterpret_cast< sal_Int8* >( pBuffer ), nSecondLength );
delete[] pBuffer;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
