1 /*
2 +----------------------------------------------------------------------+
3 | Copyright (c) The PHP Group |
4 +----------------------------------------------------------------------+
5 | This source file is subject to version 3.01 of the PHP license, |
6 | that is bundled with this package in the file LICENSE, and is |
7 | available through the world-wide-web at the following url: |
8 | https://www.php.net/license/3_01.txt |
9 | If you did not receive a copy of the PHP license and are unable to |
10 | obtain it through the world-wide-web, please send a note to |
11 | license@php.net so we can mail you a copy immediately. |
12 +----------------------------------------------------------------------+
13 | Author: Ilia Alshanetsky <ilia@php.net> |
14 +----------------------------------------------------------------------+
15 */
16
17 /*
18 * Portions of this code are based on Berkeley's uuencode/uudecode
19 * implementation.
20 *
21 * Copyright (c) 1983, 1993
22 * The Regents of the University of California. All rights reserved.
23 *
24 * Redistribution and use in source and binary forms, with or without
25 * modification, are permitted provided that the following conditions
26 * are met:
27 * 1. Redistributions of source code must retain the above copyright
28 * notice, this list of conditions and the following disclaimer.
29 * 2. Redistributions in binary form must reproduce the above copyright
30 * notice, this list of conditions and the following disclaimer in the
31 * documentation and/or other materials provided with the distribution.
32 * 3. All advertising materials mentioning features or use of this software
33 * must display the following acknowledgement:
34 * This product includes software developed by the University of
35 * California, Berkeley and its contributors.
36 * 4. Neither the name of the University nor the names of its contributors
37 * may be used to endorse or promote products derived from this software
38 * without specific prior written permission.
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 */
52
53 #include <math.h>
54
55 #include "php.h"
56 #include "php_uuencode.h"
57
58 #define PHP_UU_ENC(c) ((c) ? ((c) & 077) + ' ' : '`')
59 #define PHP_UU_ENC_C2(c) PHP_UU_ENC(((*(c) << 4) & 060) | ((*((c) + 1) >> 4) & 017))
60 #define PHP_UU_ENC_C3(c) PHP_UU_ENC(((*(c + 1) << 2) & 074) | ((*((c) + 2) >> 6) & 03))
61
62 #define PHP_UU_DEC(c) (((c) - ' ') & 077)
63
php_uuencode(const char * src,size_t src_len)64 PHPAPI zend_string *php_uuencode(const char *src, size_t src_len) /* {{{ */
65 {
66 size_t len = 45;
67 unsigned char *p;
68 const unsigned char *s, *e, *ee;
69 zend_string *dest;
70
71 /* encoded length is ~ 38% greater than the original
72 Use 1.5 for easier calculation.
73 */
74 dest = zend_string_safe_alloc(src_len/2, 3, 46, 0);
75 p = (unsigned char *) ZSTR_VAL(dest);
76 s = (unsigned char *) src;
77 e = s + src_len;
78
79 while ((s + 3) < e) {
80 ee = s + len;
81 if (ee > e) {
82 ee = e;
83 len = ee - s;
84 if (len % 3) {
85 ee = s + (int) (floor((double)len / 3) * 3);
86 }
87 }
88 *p++ = PHP_UU_ENC(len);
89
90 while (s < ee) {
91 *p++ = PHP_UU_ENC(*s >> 2);
92 *p++ = PHP_UU_ENC_C2(s);
93 *p++ = PHP_UU_ENC_C3(s);
94 *p++ = PHP_UU_ENC(*(s + 2) & 077);
95
96 s += 3;
97 }
98
99 if (len == 45) {
100 *p++ = '\n';
101 }
102 }
103
104 if (s < e) {
105 if (len == 45) {
106 *p++ = PHP_UU_ENC(e - s);
107 len = 0;
108 }
109
110 *p++ = PHP_UU_ENC(*s >> 2);
111 *p++ = PHP_UU_ENC_C2(s);
112 *p++ = ((e - s) > 1) ? PHP_UU_ENC_C3(s) : PHP_UU_ENC('\0');
113 *p++ = ((e - s) > 2) ? PHP_UU_ENC(*(s + 2) & 077) : PHP_UU_ENC('\0');
114 }
115
116 if (len < 45) {
117 *p++ = '\n';
118 }
119
120 *p++ = PHP_UU_ENC('\0');
121 *p++ = '\n';
122 *p = '\0';
123
124 dest = zend_string_truncate(dest, (char *) p - ZSTR_VAL(dest), 0);
125 return dest;
126 }
127 /* }}} */
128
php_uudecode(const char * src,size_t src_len)129 PHPAPI zend_string *php_uudecode(const char *src, size_t src_len) /* {{{ */
130 {
131 size_t len, total_len=0;
132 char *p;
133 const char *s, *e, *ee;
134 zend_string *dest;
135
136 if (src_len == 0) {
137 return NULL;
138 }
139
140 dest = zend_string_alloc((size_t) ceil(src_len * 0.75), 0);
141 p = ZSTR_VAL(dest);
142 s = src;
143 e = src + src_len;
144
145 while (s < e) {
146 if ((len = PHP_UU_DEC(*s++)) == 0) {
147 break;
148 }
149 /* sanity check */
150 if (len > src_len) {
151 goto err;
152 }
153
154 total_len += len;
155
156 ee = s + (len == 45 ? 60 : (int) floor(len * 1.33));
157 /* sanity check */
158 if (ee > e) {
159 goto err;
160 }
161
162 while (s < ee) {
163 if(s+4 > e) {
164 goto err;
165 }
166 *p++ = PHP_UU_DEC(*s) << 2 | PHP_UU_DEC(*(s + 1)) >> 4;
167 *p++ = PHP_UU_DEC(*(s + 1)) << 4 | PHP_UU_DEC(*(s + 2)) >> 2;
168 *p++ = PHP_UU_DEC(*(s + 2)) << 6 | PHP_UU_DEC(*(s + 3));
169 s += 4;
170 }
171
172 if (len < 45) {
173 break;
174 }
175
176 /* skip \n */
177 s++;
178 }
179
180 assert(p >= ZSTR_VAL(dest));
181 if ((len = total_len) > (size_t)(p - ZSTR_VAL(dest))) {
182 *p++ = PHP_UU_DEC(*s) << 2 | PHP_UU_DEC(*(s + 1)) >> 4;
183 if (len > 1) {
184 *p++ = PHP_UU_DEC(*(s + 1)) << 4 | PHP_UU_DEC(*(s + 2)) >> 2;
185 if (len > 2) {
186 *p++ = PHP_UU_DEC(*(s + 2)) << 6 | PHP_UU_DEC(*(s + 3));
187 }
188 }
189 }
190
191 ZSTR_LEN(dest) = total_len;
192 ZSTR_VAL(dest)[ZSTR_LEN(dest)] = '\0';
193
194 return dest;
195
196 err:
197 zend_string_efree(dest);
198
199 return NULL;
200 }
201 /* }}} */
202
203 /* {{{ uuencode a string */
PHP_FUNCTION(convert_uuencode)204 PHP_FUNCTION(convert_uuencode)
205 {
206 zend_string *src;
207
208 ZEND_PARSE_PARAMETERS_START(1, 1)
209 Z_PARAM_STR(src)
210 ZEND_PARSE_PARAMETERS_END();
211
212 RETURN_STR(php_uuencode(ZSTR_VAL(src), ZSTR_LEN(src)));
213 }
214 /* }}} */
215
216 /* {{{ decode a uuencoded string */
PHP_FUNCTION(convert_uudecode)217 PHP_FUNCTION(convert_uudecode)
218 {
219 zend_string *src;
220 zend_string *dest;
221
222 ZEND_PARSE_PARAMETERS_START(1, 1)
223 Z_PARAM_STR(src)
224 ZEND_PARSE_PARAMETERS_END();
225
226 if ((dest = php_uudecode(ZSTR_VAL(src), ZSTR_LEN(src))) == NULL) {
227 php_error_docref(NULL, E_WARNING, "Argument #1 ($data) is not a valid uuencoded string");
228 RETURN_FALSE;
229 }
230
231 RETURN_STR(dest);
232 }
233 /* }}} */
234
