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1 : : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : : /*************************************************************************
3 : : *
4 : : * The Contents of this file are made available subject to the terms of
5 : : * either of the following licenses
6 : : *
7 : : * - GNU Lesser General Public License Version 2.1
8 : : * - Sun Industry Standards Source License Version 1.1
9 : : *
10 : : * Sun Microsystems Inc., October, 2000
11 : : *
12 : : * GNU Lesser General Public License Version 2.1
13 : : * =============================================
14 : : * Copyright 2000 by Sun Microsystems, Inc.
15 : : * 901 San Antonio Road, Palo Alto, CA 94303, USA
16 : : *
17 : : * This library is free software; you can redistribute it and/or
18 : : * modify it under the terms of the GNU Lesser General Public
19 : : * License version 2.1, as published by the Free Software Foundation.
20 : : *
21 : : * This library is distributed in the hope that it will be useful,
22 : : * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 : : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 : : * Lesser General Public License for more details.
25 : : *
26 : : * You should have received a copy of the GNU Lesser General Public
27 : : * License along with this library; if not, write to the Free Software
28 : : * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 : : * MA 02111-1307 USA
30 : : *
31 : : *
32 : : * Sun Industry Standards Source License Version 1.1
33 : : * =================================================
34 : : * The contents of this file are subject to the Sun Industry Standards
35 : : * Source License Version 1.1 (the "License"); You may not use this file
36 : : * except in compliance with the License. You may obtain a copy of the
37 : : * License at http://www.openoffice.org/license.html.
38 : : *
39 : : * Software provided under this License is provided on an "AS IS" basis,
40 : : * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
41 : : * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
42 : : * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
43 : : * See the License for the specific provisions governing your rights and
44 : : * obligations concerning the Software.
45 : : *
46 : : * The Initial Developer of the Original Code is: IBM Corporation
47 : : *
48 : : * Copyright: 2008 by IBM Corporation
49 : : *
50 : : * All Rights Reserved.
51 : : *
52 : : * Contributor(s): _______________________________________
53 : : *
54 : : *
55 : : ************************************************************************/
56 : : /*************************************************************************
57 : : * @file
58 : : * Base64 tool.
59 : : ************************************************************************/
60 : : #include "xfbase64.hxx"
61 : :
62 : : const sal_Char aBase64EncodeTable[] =
63 : : { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
64 : : 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
65 : : 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
66 : : 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
67 : : '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' };
68 : :
69 : : /**
70 : : * @descr Encode 3 byte to 4 byte.
71 : : * Please refer to RFC to get the base64 algorithm.
72 : : */
73 : 0 : inline void Encode_(sal_uInt8 *src, sal_Char* dest)
74 : : {
75 : 0 : sal_Int32 nBinaer = (((sal_uInt8)src[ 0]) << 16) +
76 : 0 : (((sal_uInt8)src[1]) << 8) +
77 : 0 : ((sal_uInt8)src[2]);
78 : :
79 : 0 : sal_uInt8 nIndex = ((nBinaer & 0xFC0000) >> 18);
80 : 0 : dest[0] = aBase64EncodeTable [nIndex];
81 : :
82 : 0 : nIndex = (nBinaer & 0x3F000) >> 12;
83 : 0 : dest[1] =aBase64EncodeTable [nIndex];
84 : :
85 : 0 : nIndex = (nBinaer & 0xFC0) >> 6;
86 : 0 : dest[2] = aBase64EncodeTable [nIndex];
87 : :
88 : 0 : nIndex = (nBinaer & 0x3F);
89 : 0 : dest[3] = aBase64EncodeTable [nIndex];
90 : 0 : }
91 : :
92 : : /**
93 : : * @descr Base64 encode.
94 : : */
95 : 0 : rtl::OUString XFBase64::Encode(sal_uInt8 *buf, sal_Int32 len)
96 : : {
97 : : sal_Char *buffer;
98 : : sal_Int32 nNeeded;
99 : 0 : sal_Int32 cycles = len/3;
100 : 0 : sal_Int32 remain = len%3;
101 : :
102 [ # # ]: 0 : if( remain == 0 )
103 : 0 : nNeeded = cycles*4;
104 : : else
105 : 0 : nNeeded = (cycles+1)*4;
106 [ # # ]: 0 : buffer = new sal_Char[nNeeded+1];
107 : :
108 [ # # ]: 0 : rtl_zeroMemory(buffer,nNeeded+1);
109 : :
110 [ # # ]: 0 : for( sal_Int32 i=0; i<cycles; i++ )
111 : 0 : Encode_(buf+i*3,buffer+i*4);
112 : :
113 : : sal_uInt8 last[3];
114 [ # # ]: 0 : if( remain == 1 )
115 : : {
116 : 0 : last[0] = buf[len-1];
117 : 0 : last[1] = last[2] = 0;
118 : 0 : Encode_(last,buffer+nNeeded+1-5);
119 : : }
120 [ # # ]: 0 : else if( remain == 2 )
121 : : {
122 : 0 : last[0] = buf[len-2];
123 : 0 : last[1] = buf[len-1];
124 : 0 : last[2] = 0;
125 : 0 : Encode_(last,buffer+nNeeded+1-5);
126 : : }
127 : :
128 : 0 : rtl::OUString str = rtl::OUString::createFromAscii(buffer);
129 [ # # ]: 0 : delete[] buffer;
130 : :
131 : 0 : return str;
132 : : }
133 : : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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