1*b1cdbd2cSJim Jagielski /**************************************************************
2*b1cdbd2cSJim Jagielski *
3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one
4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file
5*b1cdbd2cSJim Jagielski * distributed with this work for additional information
6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file
7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the
8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance
9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at
10*b1cdbd2cSJim Jagielski *
11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0
12*b1cdbd2cSJim Jagielski *
13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing,
14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an
15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the
17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations
18*b1cdbd2cSJim Jagielski * under the License.
19*b1cdbd2cSJim Jagielski *
20*b1cdbd2cSJim Jagielski *************************************************************/
21*b1cdbd2cSJim Jagielski
22*b1cdbd2cSJim Jagielski
23*b1cdbd2cSJim Jagielski
24*b1cdbd2cSJim Jagielski #include <stdio.h>
25*b1cdbd2cSJim Jagielski #include <string.h>
26*b1cdbd2cSJim Jagielski #include "base64.h"
27*b1cdbd2cSJim Jagielski
28*b1cdbd2cSJim Jagielski static const char base64_tab[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
29*b1cdbd2cSJim Jagielski
base64_encode(FILE * fin,FILE * fout)30*b1cdbd2cSJim Jagielski extern "C" size_t base64_encode( FILE *fin, FILE *fout )
31*b1cdbd2cSJim Jagielski {
32*b1cdbd2cSJim Jagielski size_t nBytesRead = 0;
33*b1cdbd2cSJim Jagielski size_t nLineLength = 0;
34*b1cdbd2cSJim Jagielski size_t nBytesWritten = 0;
35*b1cdbd2cSJim Jagielski
36*b1cdbd2cSJim Jagielski size_t nBytes = 0;
37*b1cdbd2cSJim Jagielski
38*b1cdbd2cSJim Jagielski do
39*b1cdbd2cSJim Jagielski {
40*b1cdbd2cSJim Jagielski unsigned char in_buffer[3];
41*b1cdbd2cSJim Jagielski
42*b1cdbd2cSJim Jagielski memset( in_buffer, 0, sizeof(in_buffer) );
43*b1cdbd2cSJim Jagielski nBytes = fread( in_buffer, 1, sizeof(in_buffer), fin );
44*b1cdbd2cSJim Jagielski nBytesRead += nBytes;
45*b1cdbd2cSJim Jagielski
46*b1cdbd2cSJim Jagielski if ( nBytes )
47*b1cdbd2cSJim Jagielski {
48*b1cdbd2cSJim Jagielski unsigned long value =
49*b1cdbd2cSJim Jagielski ((unsigned long)in_buffer[0]) << 16 |
50*b1cdbd2cSJim Jagielski ((unsigned long)in_buffer[1]) << 8 |
51*b1cdbd2cSJim Jagielski ((unsigned long)in_buffer[2]) << 0;
52*b1cdbd2cSJim Jagielski
53*b1cdbd2cSJim Jagielski unsigned char out_buffer[4];
54*b1cdbd2cSJim Jagielski
55*b1cdbd2cSJim Jagielski memset( out_buffer, '=', sizeof(out_buffer) );
56*b1cdbd2cSJim Jagielski
57*b1cdbd2cSJim Jagielski out_buffer[0] = base64_tab[(value >> 18) & 0x3F];
58*b1cdbd2cSJim Jagielski out_buffer[1] = base64_tab[(value >> 12) & 0x3F];
59*b1cdbd2cSJim Jagielski
60*b1cdbd2cSJim Jagielski if ( nBytes > 1 )
61*b1cdbd2cSJim Jagielski {
62*b1cdbd2cSJim Jagielski out_buffer[2] = base64_tab[(value >> 6) & 0x3F];
63*b1cdbd2cSJim Jagielski if ( nBytes > 2 )
64*b1cdbd2cSJim Jagielski out_buffer[3] = base64_tab[(value >> 0) & 0x3F];
65*b1cdbd2cSJim Jagielski }
66*b1cdbd2cSJim Jagielski
67*b1cdbd2cSJim Jagielski if ( nLineLength >= 76 )
68*b1cdbd2cSJim Jagielski {
69*b1cdbd2cSJim Jagielski fputs( "\n", fout );
70*b1cdbd2cSJim Jagielski nLineLength = 0;
71*b1cdbd2cSJim Jagielski }
72*b1cdbd2cSJim Jagielski
73*b1cdbd2cSJim Jagielski nBytesWritten += fwrite( out_buffer, 1, sizeof(out_buffer), fout );
74*b1cdbd2cSJim Jagielski nLineLength += sizeof(out_buffer);
75*b1cdbd2cSJim Jagielski }
76*b1cdbd2cSJim Jagielski } while ( nBytes );
77*b1cdbd2cSJim Jagielski
78*b1cdbd2cSJim Jagielski return nBytesWritten;
79*b1cdbd2cSJim Jagielski }
80