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2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_filter.hxx"
26 #include "Base64Codec.hxx"
27 #include <rtl/ustrbuf.hxx>
28 #include <osl/diagnose.h>
29 using namespace rtl;
30 using namespace osl;
31 using namespace com::sun::star;
32
33 const
34 sal_Char aBase64EncodeTable[] =
35 { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
36 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
37 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
38 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
39 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' };
40
41 const
42 sal_uInt8 aBase64DecodeTable[] =
43 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0-15
44
45 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16-31
46
47 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0, 63, // 32-47
48 // + /
49
50 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 0, 0, 0, // 48-63
51 // 0 1 2 3 4 5 6 7 8 9 =
52
53 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, // 64-79
54 // A B C D E F G H I J K L M N O
55
56 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 0, // 80-95
57 // P Q R S T U V W X Y Z
58
59 0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, // 96-111
60 // a b c d e f g h i j k l m n o
61
62 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 0, 0, 0, 0, 0, // 112-127
63 // p q r s t u v w x y z
64
65 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
66 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
67 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
68 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
69 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
70 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
71 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
72 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
73
74
ThreeByteToFourByte(const sal_uInt8 * pBuffer,const sal_Int32 nStart,const sal_Int32 nFullLen,rtl::OUStringBuffer & sBuffer)75 void ThreeByteToFourByte (const sal_uInt8* pBuffer, const sal_Int32 nStart, const sal_Int32 nFullLen, rtl::OUStringBuffer& sBuffer)
76 {
77 sal_Int32 nLen(nFullLen - nStart);
78 if (nLen > 3)
79 nLen = 3;
80 if (nLen == 0)
81 {
82 sBuffer.setLength(0);
83 return;
84 }
85
86 sal_Int32 nBinaer;
87 switch (nLen)
88 {
89 case 1:
90 {
91 nBinaer = ((sal_uInt8)pBuffer[nStart + 0]) << 16;
92 }
93 break;
94 case 2:
95 {
96 nBinaer = (((sal_uInt8)pBuffer[nStart + 0]) << 16) +
97 (((sal_uInt8)pBuffer[nStart + 1]) << 8);
98 }
99 break;
100 default:
101 {
102 nBinaer = (((sal_uInt8)pBuffer[nStart + 0]) << 16) +
103 (((sal_uInt8)pBuffer[nStart + 1]) << 8) +
104 ((sal_uInt8)pBuffer[nStart + 2]);
105 }
106 break;
107 }
108
109 sBuffer.appendAscii("====");
110
111 sal_uInt8 nIndex = static_cast< sal_uInt8 >((nBinaer & 0xFC0000) >> 18);
112 sBuffer.setCharAt(0, aBase64EncodeTable [nIndex]);
113
114 nIndex = static_cast< sal_uInt8 >((nBinaer & 0x3F000) >> 12);
115 sBuffer.setCharAt(1, aBase64EncodeTable [nIndex]);
116 if (nLen == 1)
117 return;
118
119 nIndex = static_cast< sal_uInt8 >((nBinaer & 0xFC0) >> 6);
120 sBuffer.setCharAt(2, aBase64EncodeTable [nIndex]);
121 if (nLen == 2)
122 return;
123
124 nIndex = static_cast< sal_uInt8 >((nBinaer & 0x3F));
125 sBuffer.setCharAt(3, aBase64EncodeTable [nIndex]);
126 }
127
encodeBase64(rtl::OUStringBuffer & aStrBuffer,const uno::Sequence<sal_Int8> & aPass)128 void Base64Codec::encodeBase64(rtl::OUStringBuffer& aStrBuffer, const uno::Sequence < sal_Int8 >& aPass)
129 {
130 sal_Int32 i(0);
131 sal_Int32 nBufferLength(aPass.getLength());
132 const sal_Int8* pBuffer = aPass.getConstArray();
133 while (i < nBufferLength)
134 {
135 rtl::OUStringBuffer sBuffer;
136 ThreeByteToFourByte ((const sal_uInt8*)pBuffer, i, nBufferLength, sBuffer);
137 aStrBuffer.append(sBuffer);
138 i += 3;
139 }
140 }
141
142 const rtl::OUString s2equal(RTL_CONSTASCII_USTRINGPARAM("=="));
143 const rtl::OUString s1equal(RTL_CONSTASCII_USTRINGPARAM("="));
144 #if 0
145 void FourByteToThreeByte (sal_uInt8* pBuffer, sal_Int32& nLength, const sal_Int32 nStart, const rtl::OUString& sString)
146 {
147 nLength = 0;
148 sal_Int32 nLen (sString.getLength());
149
150 if (nLen != 4)
151 {
152 return;
153 }
154
155
156 if (sString.indexOf(s2equal) == 2)
157 nLength = 1;
158 else if (sString.indexOf(s1equal) == 3)
159 nLength = 2;
160 else
161 nLength = 3;
162
163 sal_Int32 nBinaer ((aBase64DecodeTable [sString [0]] << 18) +
164 (aBase64DecodeTable [sString [1]] << 12) +
165 (aBase64DecodeTable [sString [2]] << 6) +
166 (aBase64DecodeTable [sString [3]]));
167
168 sal_uInt8 OneByte = static_cast< sal_uInt8 >((nBinaer & 0xFF0000) >> 16);
169 pBuffer[nStart + 0] = (sal_uInt8)OneByte;
170
171 if (nLength == 1)
172 return;
173
174 OneByte = static_cast< sal_uInt8 >((nBinaer & 0xFF00) >> 8);
175 pBuffer[nStart + 1] = (sal_uInt8)OneByte;
176
177 if (nLength == 2)
178 return;
179
180 OneByte = static_cast< sal_uInt8 >(nBinaer & 0xFF);
181 pBuffer[nStart + 2] = (sal_uInt8)OneByte;
182 }
183
184 void Base64Codec::decodeBase64(uno::Sequence< sal_uInt8 >& aBuffer, const rtl::OUString& sBuffer)
185 {
186 sal_Int32 nFirstLength((sBuffer.getLength() / 4) * 3);
187 sal_uInt8* pBuffer = new sal_uInt8[nFirstLength];
188 sal_Int32 nSecondLength(0);
189 sal_Int32 nLength(0);
190 sal_Int32 i = 0;
191 sal_Int32 k = 0;
192 while (i < sBuffer.getLength())
193 {
194 FourByteToThreeByte (pBuffer, nLength, k, sBuffer.copy(i, 4));
195 nSecondLength += nLength;
196 nLength = 0;
197 i += 4;
198 k += 3;
199 }
200 aBuffer = uno::Sequence<sal_uInt8>(pBuffer, nSecondLength);
201 delete[] pBuffer;
202 }
203 #endif
204