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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
|
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* base64 encoder/decoder. Originally part of main/util.c
* but moved here so that support/ab and apr_sha1.c could
* use it. This meant removing the apr_palloc()s and adding
* ugly 'len' functions, which is quite a nasty cost.
*/
#include "apr_base64.h"
#if APR_CHARSET_EBCDIC
#include "apr_xlate.h"
#endif /* APR_CHARSET_EBCDIC */
/* aaaack but it's fast and const should make it shared text page. */
static const unsigned char pr2six[256] =
{
#if !APR_CHARSET_EBCDIC
/* ASCII table */
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64, 64, 64, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64,
64, 0, 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, 64, 64, 64, 64, 64,
64, 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, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64
#else /*APR_CHARSET_EBCDIC*/
/* EBCDIC table */
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 63, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 26, 27, 28, 29, 30, 31, 32, 33, 34, 64, 64, 64, 64, 64, 64,
64, 35, 36, 37, 38, 39, 40, 41, 42, 43, 64, 64, 64, 64, 64, 64,
64, 64, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 0, 1, 2, 3, 4, 5, 6, 7, 8, 64, 64, 64, 64, 64, 64,
64, 9, 10, 11, 12, 13, 14, 15, 16, 17, 64, 64, 64, 64, 64, 64,
64, 64, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64, 64,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64
#endif /*APR_CHARSET_EBCDIC*/
};
#if APR_CHARSET_EBCDIC
static apr_xlate_t *xlate_to_ebcdic;
static unsigned char os_toascii[256];
APU_DECLARE(apr_status_t) apr_base64init_ebcdic(apr_xlate_t *to_ascii,
apr_xlate_t *to_ebcdic)
{
int i;
apr_size_t inbytes_left, outbytes_left;
apr_status_t rv;
int onoff;
/* Only single-byte conversion is supported.
*/
rv = apr_xlate_sb_get(to_ascii, &onoff);
if (rv) {
return rv;
}
if (!onoff) { /* If conversion is not single-byte-only */
return APR_EINVAL;
}
rv = apr_xlate_sb_get(to_ebcdic, &onoff);
if (rv) {
return rv;
}
if (!onoff) { /* If conversion is not single-byte-only */
return APR_EINVAL;
}
xlate_to_ebcdic = to_ebcdic;
for (i = 0; i < sizeof(os_toascii); i++) {
os_toascii[i] = i;
}
inbytes_left = outbytes_left = sizeof(os_toascii);
apr_xlate_conv_buffer(to_ascii, os_toascii, &inbytes_left,
os_toascii, &outbytes_left);
return APR_SUCCESS;
}
#endif /*APR_CHARSET_EBCDIC*/
APU_DECLARE(int) apr_base64_decode_len(const char *bufcoded)
{
int nbytesdecoded;
register const unsigned char *bufin;
register apr_size_t nprbytes;
bufin = (const unsigned char *) bufcoded;
while (pr2six[*(bufin++)] <= 63);
nprbytes = (bufin - (const unsigned char *) bufcoded) - 1;
nbytesdecoded = (((int)nprbytes + 3) / 4) * 3;
return nbytesdecoded + 1;
}
APU_DECLARE(int) apr_base64_decode(char *bufplain, const char *bufcoded)
{
#if APR_CHARSET_EBCDIC
apr_size_t inbytes_left, outbytes_left;
#endif /* APR_CHARSET_EBCDIC */
int len;
len = apr_base64_decode_binary((unsigned char *) bufplain, bufcoded);
#if APR_CHARSET_EBCDIC
inbytes_left = outbytes_left = len;
apr_xlate_conv_buffer(xlate_to_ebcdic, bufplain, &inbytes_left,
bufplain, &outbytes_left);
#endif /* APR_CHARSET_EBCDIC */
bufplain[len] = '\0';
return len;
}
/* This is the same as apr_base64_decode() except on EBCDIC machines, where
* the conversion of the output to ebcdic is left out.
*/
APU_DECLARE(int) apr_base64_decode_binary(unsigned char *bufplain,
const char *bufcoded)
{
int nbytesdecoded;
register const unsigned char *bufin;
register unsigned char *bufout;
register apr_size_t nprbytes;
bufin = (const unsigned char *) bufcoded;
while (pr2six[*(bufin++)] <= 63);
nprbytes = (bufin - (const unsigned char *) bufcoded) - 1;
nbytesdecoded = (((int)nprbytes + 3) / 4) * 3;
bufout = (unsigned char *) bufplain;
bufin = (const unsigned char *) bufcoded;
while (nprbytes > 4) {
*(bufout++) =
(unsigned char) (pr2six[*bufin] << 2 | pr2six[bufin[1]] >> 4);
*(bufout++) =
(unsigned char) (pr2six[bufin[1]] << 4 | pr2six[bufin[2]] >> 2);
*(bufout++) =
(unsigned char) (pr2six[bufin[2]] << 6 | pr2six[bufin[3]]);
bufin += 4;
nprbytes -= 4;
}
/* Note: (nprbytes == 1) would be an error, so just ingore that case */
if (nprbytes > 1) {
*(bufout++) =
(unsigned char) (pr2six[*bufin] << 2 | pr2six[bufin[1]] >> 4);
}
if (nprbytes > 2) {
*(bufout++) =
(unsigned char) (pr2six[bufin[1]] << 4 | pr2six[bufin[2]] >> 2);
}
if (nprbytes > 3) {
*(bufout++) =
(unsigned char) (pr2six[bufin[2]] << 6 | pr2six[bufin[3]]);
}
nbytesdecoded -= (4 - (int)nprbytes) & 3;
return nbytesdecoded;
}
static const char basis_64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
APU_DECLARE(int) apr_base64_encode_len(int len)
{
return ((len + 2) / 3 * 4) + 1;
}
APU_DECLARE(int) apr_base64_encode(char *encoded, const char *string, int len)
{
#if !APR_CHARSET_EBCDIC
return apr_base64_encode_binary(encoded, (const unsigned char *) string, len);
#else /* APR_CHARSET_EBCDIC */
int i;
char *p;
p = encoded;
for (i = 0; i < len - 2; i += 3) {
*p++ = basis_64[(os_toascii[string[i]] >> 2) & 0x3F];
*p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4) |
((int) (os_toascii[string[i + 1]] & 0xF0) >> 4)];
*p++ = basis_64[((os_toascii[string[i + 1]] & 0xF) << 2) |
((int) (os_toascii[string[i + 2]] & 0xC0) >> 6)];
*p++ = basis_64[os_toascii[string[i + 2]] & 0x3F];
}
if (i < len) {
*p++ = basis_64[(os_toascii[string[i]] >> 2) & 0x3F];
if (i == (len - 1)) {
*p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4)];
*p++ = '=';
}
else {
*p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4) |
((int) (os_toascii[string[i + 1]] & 0xF0) >> 4)];
*p++ = basis_64[((os_toascii[string[i + 1]] & 0xF) << 2)];
}
*p++ = '=';
}
*p++ = '\0';
return p - encoded;
#endif /* APR_CHARSET_EBCDIC */
}
/* This is the same as apr_base64_encode() except on EBCDIC machines, where
* the conversion of the input to ascii is left out.
*/
APU_DECLARE(int) apr_base64_encode_binary(char *encoded,
const unsigned char *string, int len)
{
int i;
char *p;
p = encoded;
for (i = 0; i < len - 2; i += 3) {
*p++ = basis_64[(string[i] >> 2) & 0x3F];
*p++ = basis_64[((string[i] & 0x3) << 4) |
((int) (string[i + 1] & 0xF0) >> 4)];
*p++ = basis_64[((string[i + 1] & 0xF) << 2) |
((int) (string[i + 2] & 0xC0) >> 6)];
*p++ = basis_64[string[i + 2] & 0x3F];
}
if (i < len) {
*p++ = basis_64[(string[i] >> 2) & 0x3F];
if (i == (len - 1)) {
*p++ = basis_64[((string[i] & 0x3) << 4)];
*p++ = '=';
}
else {
*p++ = basis_64[((string[i] & 0x3) << 4) |
((int) (string[i + 1] & 0xF0) >> 4)];
*p++ = basis_64[((string[i + 1] & 0xF) << 2)];
}
*p++ = '=';
}
*p++ = '\0';
return (int)(p - encoded);
}
|
