1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2015 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: Kirill Maximov <kir@actimind.com> |
16 +----------------------------------------------------------------------+
17 */
18
19 /* $Id$ */
20
21 #include <stdlib.h>
22
23 #ifdef HAVE_UNISTD_H
24 #include <unistd.h>
25 #endif
26 #include <string.h>
27 #include <errno.h>
28
29 #include "php.h"
30 #include "quot_print.h"
31
32 #include <stdio.h>
33
34 /*
35 * Converting HEX char to INT value
36 */
php_hex2int(int c)37 static char php_hex2int(int c) /* {{{ */
38 {
39 if (isdigit(c)) {
40 return c - '0';
41 }
42 else if (c >= 'A' && c <= 'F') {
43 return c - 'A' + 10;
44 }
45 else if (c >= 'a' && c <= 'f') {
46 return c - 'a' + 10;
47 }
48 else {
49 return -1;
50 }
51 }
52 /* }}} */
53
php_quot_print_decode(const unsigned char * str,size_t length,size_t * ret_length,int replace_us_by_ws)54 PHPAPI unsigned char *php_quot_print_decode(const unsigned char *str, size_t length, size_t *ret_length, int replace_us_by_ws) /* {{{ */
55 {
56 register unsigned int i;
57 register unsigned const char *p1;
58 register unsigned char *p2;
59 register unsigned int h_nbl, l_nbl;
60
61 size_t decoded_len, buf_size;
62 unsigned char *retval;
63
64 static unsigned int hexval_tbl[256] = {
65 64, 64, 64, 64, 64, 64, 64, 64, 64, 32, 16, 64, 64, 16, 64, 64,
66 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
67 32, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
68 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 64, 64, 64, 64, 64, 64,
69 64, 10, 11, 12, 13, 14, 15, 64, 64, 64, 64, 64, 64, 64, 64, 64,
70 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
71 64, 10, 11, 12, 13, 14, 15, 64, 64, 64, 64, 64, 64, 64, 64, 64,
72 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
73 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
74 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
75 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
76 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
77 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
78 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
79 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
80 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64
81 };
82
83 if (replace_us_by_ws) {
84 replace_us_by_ws = '_';
85 }
86
87 i = length, p1 = str; buf_size = length;
88
89 while (i > 1 && *p1 != '\0') {
90 if (*p1 == '=') {
91 buf_size -= 2;
92 p1++;
93 i--;
94 }
95 p1++;
96 i--;
97 }
98
99 retval = emalloc(buf_size + 1);
100 i = length; p1 = str; p2 = retval;
101 decoded_len = 0;
102
103 while (i > 0 && *p1 != '\0') {
104 if (*p1 == '=') {
105 i--, p1++;
106 if (i == 0 || *p1 == '\0') {
107 break;
108 }
109 h_nbl = hexval_tbl[*p1];
110 if (h_nbl < 16) {
111 /* next char should be a hexadecimal digit */
112 if ((--i) == 0 || (l_nbl = hexval_tbl[*(++p1)]) >= 16) {
113 efree(retval);
114 return NULL;
115 }
116 *(p2++) = (h_nbl << 4) | l_nbl, decoded_len++;
117 i--, p1++;
118 } else if (h_nbl < 64) {
119 /* soft line break */
120 while (h_nbl == 32) {
121 if (--i == 0 || (h_nbl = hexval_tbl[*(++p1)]) == 64) {
122 efree(retval);
123 return NULL;
124 }
125 }
126 if (p1[0] == '\r' && i >= 2 && p1[1] == '\n') {
127 i--, p1++;
128 }
129 i--, p1++;
130 } else {
131 efree(retval);
132 return NULL;
133 }
134 } else {
135 *(p2++) = (replace_us_by_ws == *p1 ? '\x20': *p1);
136 i--, p1++, decoded_len++;
137 }
138 }
139
140 *p2 = '\0';
141 *ret_length = decoded_len;
142 return retval;
143 }
144 /* }}} */
145
146 #define PHP_QPRINT_MAXL 75
147
php_quot_print_encode(const unsigned char * str,size_t length,size_t * ret_length)148 PHPAPI unsigned char *php_quot_print_encode(const unsigned char *str, size_t length, size_t *ret_length) /* {{{ */
149 {
150 unsigned long lp = 0;
151 unsigned char c, *ret, *d;
152 char *hex = "0123456789ABCDEF";
153
154 ret = safe_emalloc(3, length + (((3 * length)/(PHP_QPRINT_MAXL-9)) + 1), 1);
155 d = ret;
156
157 while (length--) {
158 if (((c = *str++) == '\015') && (*str == '\012') && length > 0) {
159 *d++ = '\015';
160 *d++ = *str++;
161 length--;
162 lp = 0;
163 } else {
164 if (iscntrl (c) || (c == 0x7f) || (c & 0x80) || (c == '=') || ((c == ' ') && (*str == '\015'))) {
165 if ((((lp+= 3) > PHP_QPRINT_MAXL) && (c <= 0x7f))
166 || ((c > 0x7f) && (c <= 0xdf) && ((lp + 3) > PHP_QPRINT_MAXL))
167 || ((c > 0xdf) && (c <= 0xef) && ((lp + 6) > PHP_QPRINT_MAXL))
168 || ((c > 0xef) && (c <= 0xf4) && ((lp + 9) > PHP_QPRINT_MAXL))) {
169 *d++ = '=';
170 *d++ = '\015';
171 *d++ = '\012';
172 lp = 3;
173 }
174 *d++ = '=';
175 *d++ = hex[c >> 4];
176 *d++ = hex[c & 0xf];
177 } else {
178 if ((++lp) > PHP_QPRINT_MAXL) {
179 *d++ = '=';
180 *d++ = '\015';
181 *d++ = '\012';
182 lp = 1;
183 }
184 *d++ = c;
185 }
186 }
187 }
188 *d = '\0';
189 *ret_length = d - ret;
190
191 ret = erealloc(ret, *ret_length + 1);
192 return ret;
193 }
194 /* }}} */
195
196 /*
197 *
198 * Decoding Quoted-printable string.
199 *
200 */
201 /* {{{ proto string quoted_printable_decode(string str)
202 Convert a quoted-printable string to an 8 bit string */
PHP_FUNCTION(quoted_printable_decode)203 PHP_FUNCTION(quoted_printable_decode)
204 {
205 char *arg1, *str_in, *str_out;
206 int arg1_len, i = 0, j = 0, k;
207
208 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &arg1, &arg1_len) == FAILURE) {
209 return;
210 }
211
212 if (arg1_len == 0) {
213 /* shortcut */
214 RETURN_EMPTY_STRING();
215 }
216
217 str_in = arg1;
218 str_out = emalloc(arg1_len + 1);
219 while (str_in[i]) {
220 switch (str_in[i]) {
221 case '=':
222 if (str_in[i + 1] && str_in[i + 2] &&
223 isxdigit((int) str_in[i + 1]) &&
224 isxdigit((int) str_in[i + 2]))
225 {
226 str_out[j++] = (php_hex2int((int) str_in[i + 1]) << 4)
227 + php_hex2int((int) str_in[i + 2]);
228 i += 3;
229 } else /* check for soft line break according to RFC 2045*/ {
230 k = 1;
231 while (str_in[i + k] && ((str_in[i + k] == 32) || (str_in[i + k] == 9))) {
232 /* Possibly, skip spaces/tabs at the end of line */
233 k++;
234 }
235 if (!str_in[i + k]) {
236 /* End of line reached */
237 i += k;
238 }
239 else if ((str_in[i + k] == 13) && (str_in[i + k + 1] == 10)) {
240 /* CRLF */
241 i += k + 2;
242 }
243 else if ((str_in[i + k] == 13) || (str_in[i + k] == 10)) {
244 /* CR or LF */
245 i += k + 1;
246 }
247 else {
248 str_out[j++] = str_in[i++];
249 }
250 }
251 break;
252 default:
253 str_out[j++] = str_in[i++];
254 }
255 }
256 str_out[j] = '\0';
257
258 RETVAL_STRINGL(str_out, j, 0);
259 }
260 /* }}} */
261
262 /* {{{ proto string quoted_printable_encode(string str) */
PHP_FUNCTION(quoted_printable_encode)263 PHP_FUNCTION(quoted_printable_encode)
264 {
265 char *str, *new_str;
266 int str_len;
267 size_t new_str_len;
268
269 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &str, &str_len) != SUCCESS) {
270 return;
271 }
272
273 if (!str_len) {
274 RETURN_EMPTY_STRING();
275 }
276
277 new_str = (char *)php_quot_print_encode((unsigned char *)str, (size_t)str_len, &new_str_len);
278 RETURN_STRINGL(new_str, new_str_len, 0);
279 }
280 /* }}} */
281
282 /*
283 * Local variables:
284 * tab-width: 4
285 * c-basic-offset: 4
286 * End:
287 * vim600: sw=4 ts=4 fdm=marker
288 * vim<600: sw=4 ts=4
289 */
290
