1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2016 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Author: Ilia Alshanetsky <ilia@php.net> |
16 +----------------------------------------------------------------------+
17 */
18
19 /* $Id$ */
20
21 /*
22 * Portions of this code are based on Berkeley's uuencode/uudecode
23 * implementation.
24 *
25 * Copyright (c) 1983, 1993
26 * The Regents of the University of California. All rights reserved.
27 *
28 * Redistribution and use in source and binary forms, with or without
29 * modification, are permitted provided that the following conditions
30 * are met:
31 * 1. Redistributions of source code must retain the above copyright
32 * notice, this list of conditions and the following disclaimer.
33 * 2. Redistributions in binary form must reproduce the above copyright
34 * notice, this list of conditions and the following disclaimer in the
35 * documentation and/or other materials provided with the distribution.
36 * 3. All advertising materials mentioning features or use of this software
37 * must display the following acknowledgement:
38 * This product includes software developed by the University of
39 * California, Berkeley and its contributors.
40 * 4. Neither the name of the University nor the names of its contributors
41 * may be used to endorse or promote products derived from this software
42 * without specific prior written permission.
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
47 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
54 * SUCH DAMAGE.
55 */
56
57 #include <math.h>
58
59 #include "php.h"
60 #include "php_uuencode.h"
61
62 #define PHP_UU_ENC(c) ((c) ? ((c) & 077) + ' ' : '`')
63 #define PHP_UU_ENC_C2(c) PHP_UU_ENC(((*(c) << 4) & 060) | ((*((c) + 1) >> 4) & 017))
64 #define PHP_UU_ENC_C3(c) PHP_UU_ENC(((*(c + 1) << 2) & 074) | ((*((c) + 2) >> 6) & 03))
65
66 #define PHP_UU_DEC(c) (((c) - ' ') & 077)
67
68 PHPAPI int php_uuencode(char *src, int src_len, char **dest) /* {{{ */
69 {
70 int len = 45;
71 char *p, *s, *e, *ee;
72
73 /* encoded length is ~ 38% greater than the original */
74 p = *dest = safe_emalloc((size_t) ceil(src_len * 1.38), 1, 46);
75 s = src;
76 e = src + src_len;
77
78 while ((s + 3) < e) {
79 ee = s + len;
80 if (ee > e) {
81 ee = e;
82 len = ee - s;
83 if (len % 3) {
84 ee = s + (int) (floor(len / 3) * 3);
85 }
86 }
87 *p++ = PHP_UU_ENC(len);
88
89 while (s < ee) {
90 *p++ = PHP_UU_ENC(*s >> 2);
91 *p++ = PHP_UU_ENC_C2(s);
92 *p++ = PHP_UU_ENC_C3(s);
93 *p++ = PHP_UU_ENC(*(s + 2) & 077);
94
95 s += 3;
96 }
97
98 if (len == 45) {
99 *p++ = '\n';
100 }
101 }
102
103 if (s < e) {
104 if (len == 45) {
105 *p++ = PHP_UU_ENC(e - s);
106 len = 0;
107 }
108
109 *p++ = PHP_UU_ENC(*s >> 2);
110 *p++ = PHP_UU_ENC_C2(s);
111 *p++ = ((e - s) > 1) ? PHP_UU_ENC_C3(s) : PHP_UU_ENC('\0');
112 *p++ = ((e - s) > 2) ? PHP_UU_ENC(*(s + 2) & 077) : PHP_UU_ENC('\0');
113 }
114
115 if (len < 45) {
116 *p++ = '\n';
117 }
118
119 *p++ = PHP_UU_ENC('\0');
120 *p++ = '\n';
121 *p = '\0';
122
123 return (p - *dest);
124 }
125 /* }}} */
126
127 PHPAPI int php_uudecode(char *src, int src_len, char **dest) /* {{{ */
128 {
129 int len, total_len=0;
130 char *s, *e, *p, *ee;
131
132 p = *dest = safe_emalloc((size_t) ceil(src_len * 0.75), 1, 1);
133 s = src;
134 e = src + src_len;
135
136 while (s < e) {
137 if ((len = PHP_UU_DEC(*s++)) <= 0) {
138 break;
139 }
140 /* sanity check */
141 if (len > src_len) {
142 goto err;
143 }
144
145 total_len += len;
146
147 ee = s + (len == 45 ? 60 : (int) floor(len * 1.33));
148 /* sanity check */
149 if (ee > e) {
150 goto err;
151 }
152
153 while (s < ee) {
154 if(s+4 > e) {
155 goto err;
156 }
157 *p++ = PHP_UU_DEC(*s) << 2 | PHP_UU_DEC(*(s + 1)) >> 4;
158 *p++ = PHP_UU_DEC(*(s + 1)) << 4 | PHP_UU_DEC(*(s + 2)) >> 2;
159 *p++ = PHP_UU_DEC(*(s + 2)) << 6 | PHP_UU_DEC(*(s + 3));
160 s += 4;
161 }
162
163 if (len < 45) {
164 break;
165 }
166
167 /* skip \n */
168 s++;
169 }
170
171 if ((len = total_len) > (p - *dest)) {
172 *p++ = PHP_UU_DEC(*s) << 2 | PHP_UU_DEC(*(s + 1)) >> 4;
173 if (len > 1) {
174 *p++ = PHP_UU_DEC(*(s + 1)) << 4 | PHP_UU_DEC(*(s + 2)) >> 2;
175 if (len > 2) {
176 *p++ = PHP_UU_DEC(*(s + 2)) << 6 | PHP_UU_DEC(*(s + 3));
177 }
178 }
179 }
180
181 *(*dest + total_len) = '\0';
182
183 return total_len;
184
185 err:
186 efree(*dest);
187 return -1;
188 }
189 /* }}} */
190
191 /* {{{ proto string convert_uuencode(string data)
192 uuencode a string */
193 PHP_FUNCTION(convert_uuencode)
194 {
195 char *src, *dst;
196 int src_len, dst_len;
197
198 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &src, &src_len) == FAILURE || src_len < 1) {
199 RETURN_FALSE;
200 }
201
202 dst_len = php_uuencode(src, src_len, &dst);
203
204 RETURN_STRINGL(dst, dst_len, 0);
205 }
206 /* }}} */
207
208 /* {{{ proto string convert_uudecode(string data)
209 decode a uuencoded string */
210 PHP_FUNCTION(convert_uudecode)
211 {
212 char *src, *dst;
213 int src_len, dst_len;
214
215 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &src, &src_len) == FAILURE || src_len < 1) {
216 RETURN_FALSE;
217 }
218
219 dst_len = php_uudecode(src, src_len, &dst);
220 if (dst_len < 0) {
221 php_error_docref(NULL TSRMLS_CC, E_WARNING, "The given parameter is not a valid uuencoded string");
222 RETURN_FALSE;
223 }
224
225 RETURN_STRINGL(dst, dst_len, 0);
226 }
227 /* }}} */
228
229 /*
230 * Local variables:
231 * tab-width: 4
232 * c-basic-offset: 4
233 * End:
234 * vim600: noet sw=4 ts=4 fdm=marker
235 * vim<600: noet sw=4 ts=4
236 */