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1 : : /* crypto/asn1/a_utf8.c */
2 : : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 : : * All rights reserved.
4 : : *
5 : : * This package is an SSL implementation written
6 : : * by Eric Young (eay@cryptsoft.com).
7 : : * The implementation was written so as to conform with Netscapes SSL.
8 : : *
9 : : * This library is free for commercial and non-commercial use as long as
10 : : * the following conditions are aheared to. The following conditions
11 : : * apply to all code found in this distribution, be it the RC4, RSA,
12 : : * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 : : * included with this distribution is covered by the same copyright terms
14 : : * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 : : *
16 : : * Copyright remains Eric Young's, and as such any Copyright notices in
17 : : * the code are not to be removed.
18 : : * If this package is used in a product, Eric Young should be given attribution
19 : : * as the author of the parts of the library used.
20 : : * This can be in the form of a textual message at program startup or
21 : : * in documentation (online or textual) provided with the package.
22 : : *
23 : : * Redistribution and use in source and binary forms, with or without
24 : : * modification, are permitted provided that the following conditions
25 : : * are met:
26 : : * 1. Redistributions of source code must retain the copyright
27 : : * notice, this list of conditions and the following disclaimer.
28 : : * 2. Redistributions in binary form must reproduce the above copyright
29 : : * notice, this list of conditions and the following disclaimer in the
30 : : * documentation and/or other materials provided with the distribution.
31 : : * 3. All advertising materials mentioning features or use of this software
32 : : * must display the following acknowledgement:
33 : : * "This product includes cryptographic software written by
34 : : * Eric Young (eay@cryptsoft.com)"
35 : : * The word 'cryptographic' can be left out if the rouines from the library
36 : : * being used are not cryptographic related :-).
37 : : * 4. If you include any Windows specific code (or a derivative thereof) from
38 : : * the apps directory (application code) you must include an acknowledgement:
39 : : * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 : : *
41 : : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 : : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 : : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 : : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 : : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 : : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 : : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 : : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 : : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 : : * SUCH DAMAGE.
52 : : *
53 : : * The licence and distribution terms for any publically available version or
54 : : * derivative of this code cannot be changed. i.e. this code cannot simply be
55 : : * copied and put under another distribution licence
56 : : * [including the GNU Public Licence.]
57 : : */
58 : :
59 : : #include <stdio.h>
60 : : #include "cryptlib.h"
61 : : #include <openssl/asn1.h>
62 : :
63 : :
64 : : /* UTF8 utilities */
65 : :
66 : : /* This parses a UTF8 string one character at a time. It is passed a pointer
67 : : * to the string and the length of the string. It sets 'value' to the value of
68 : : * the current character. It returns the number of characters read or a
69 : : * negative error code:
70 : : * -1 = string too short
71 : : * -2 = illegal character
72 : : * -3 = subsequent characters not of the form 10xxxxxx
73 : : * -4 = character encoded incorrectly (not minimal length).
74 : : */
75 : :
76 : 1288282 : int UTF8_getc(const unsigned char *str, int len, unsigned long *val)
77 : : {
78 : : const unsigned char *p;
79 : : unsigned long value;
80 : : int ret;
81 [ + - ]: 1288282 : if(len <= 0) return 0;
82 : 1288282 : p = str;
83 : :
84 : : /* Check syntax and work out the encoded value (if correct) */
85 [ + - ]: 1288282 : if((*p & 0x80) == 0) {
86 : 1288282 : value = *p++ & 0x7f;
87 : 1288282 : ret = 1;
88 [ # # ]: 0 : } else if((*p & 0xe0) == 0xc0) {
89 [ # # ]: 0 : if(len < 2) return -1;
90 [ # # ]: 0 : if((p[1] & 0xc0) != 0x80) return -3;
91 : 0 : value = (*p++ & 0x1f) << 6;
92 : 0 : value |= *p++ & 0x3f;
93 [ # # ]: 0 : if(value < 0x80) return -4;
94 : : ret = 2;
95 [ # # ]: 0 : } else if((*p & 0xf0) == 0xe0) {
96 [ # # ]: 0 : if(len < 3) return -1;
97 [ # # ]: 0 : if( ((p[1] & 0xc0) != 0x80)
98 [ # # ]: 0 : || ((p[2] & 0xc0) != 0x80) ) return -3;
99 : 0 : value = (*p++ & 0xf) << 12;
100 : 0 : value |= (*p++ & 0x3f) << 6;
101 : 0 : value |= *p++ & 0x3f;
102 [ # # ]: 0 : if(value < 0x800) return -4;
103 : : ret = 3;
104 [ # # ]: 0 : } else if((*p & 0xf8) == 0xf0) {
105 [ # # ]: 0 : if(len < 4) return -1;
106 [ # # ]: 0 : if( ((p[1] & 0xc0) != 0x80)
107 [ # # ]: 0 : || ((p[2] & 0xc0) != 0x80)
108 [ # # ]: 0 : || ((p[3] & 0xc0) != 0x80) ) return -3;
109 : 0 : value = ((unsigned long)(*p++ & 0x7)) << 18;
110 : 0 : value |= (*p++ & 0x3f) << 12;
111 : 0 : value |= (*p++ & 0x3f) << 6;
112 : 0 : value |= *p++ & 0x3f;
113 [ # # ]: 0 : if(value < 0x10000) return -4;
114 : : ret = 4;
115 [ # # ]: 0 : } else if((*p & 0xfc) == 0xf8) {
116 [ # # ]: 0 : if(len < 5) return -1;
117 [ # # ]: 0 : if( ((p[1] & 0xc0) != 0x80)
118 [ # # ]: 0 : || ((p[2] & 0xc0) != 0x80)
119 [ # # ]: 0 : || ((p[3] & 0xc0) != 0x80)
120 [ # # ]: 0 : || ((p[4] & 0xc0) != 0x80) ) return -3;
121 : 0 : value = ((unsigned long)(*p++ & 0x3)) << 24;
122 : 0 : value |= ((unsigned long)(*p++ & 0x3f)) << 18;
123 : 0 : value |= ((unsigned long)(*p++ & 0x3f)) << 12;
124 : 0 : value |= (*p++ & 0x3f) << 6;
125 : 0 : value |= *p++ & 0x3f;
126 [ # # ]: 0 : if(value < 0x200000) return -4;
127 : : ret = 5;
128 [ # # ]: 0 : } else if((*p & 0xfe) == 0xfc) {
129 [ # # ]: 0 : if(len < 6) return -1;
130 [ # # ]: 0 : if( ((p[1] & 0xc0) != 0x80)
131 [ # # ]: 0 : || ((p[2] & 0xc0) != 0x80)
132 [ # # ]: 0 : || ((p[3] & 0xc0) != 0x80)
133 [ # # ]: 0 : || ((p[4] & 0xc0) != 0x80)
134 [ # # ]: 0 : || ((p[5] & 0xc0) != 0x80) ) return -3;
135 : 0 : value = ((unsigned long)(*p++ & 0x1)) << 30;
136 : 0 : value |= ((unsigned long)(*p++ & 0x3f)) << 24;
137 : 0 : value |= ((unsigned long)(*p++ & 0x3f)) << 18;
138 : 0 : value |= ((unsigned long)(*p++ & 0x3f)) << 12;
139 : 0 : value |= (*p++ & 0x3f) << 6;
140 : 0 : value |= *p++ & 0x3f;
141 [ # # ]: 0 : if(value < 0x4000000) return -4;
142 : : ret = 6;
143 : : } else return -2;
144 : 1288282 : *val = value;
145 : 1288282 : return ret;
146 : : }
147 : :
148 : : /* This takes a character 'value' and writes the UTF8 encoded value in
149 : : * 'str' where 'str' is a buffer containing 'len' characters. Returns
150 : : * the number of characters written or -1 if 'len' is too small. 'str' can
151 : : * be set to NULL in which case it just returns the number of characters.
152 : : * It will need at most 6 characters.
153 : : */
154 : :
155 : 449754 : int UTF8_putc(unsigned char *str, int len, unsigned long value)
156 : : {
157 [ + + ]: 449754 : if(!str) len = 6; /* Maximum we will need */
158 [ + - ]: 225140 : else if(len <= 0) return -1;
159 [ + - ]: 449754 : if(value < 0x80) {
160 [ + + ]: 449754 : if(str) *str = (unsigned char)value;
161 : : return 1;
162 : : }
163 [ # # ]: 0 : if(value < 0x800) {
164 [ # # ]: 0 : if(len < 2) return -1;
165 [ # # ]: 0 : if(str) {
166 : 0 : *str++ = (unsigned char)(((value >> 6) & 0x1f) | 0xc0);
167 : 0 : *str = (unsigned char)((value & 0x3f) | 0x80);
168 : : }
169 : : return 2;
170 : : }
171 [ # # ]: 0 : if(value < 0x10000) {
172 [ # # ]: 0 : if(len < 3) return -1;
173 [ # # ]: 0 : if(str) {
174 : 0 : *str++ = (unsigned char)(((value >> 12) & 0xf) | 0xe0);
175 : 0 : *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80);
176 : 0 : *str = (unsigned char)((value & 0x3f) | 0x80);
177 : : }
178 : : return 3;
179 : : }
180 [ # # ]: 0 : if(value < 0x200000) {
181 [ # # ]: 0 : if(len < 4) return -1;
182 [ # # ]: 0 : if(str) {
183 : 0 : *str++ = (unsigned char)(((value >> 18) & 0x7) | 0xf0);
184 : 0 : *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80);
185 : 0 : *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80);
186 : 0 : *str = (unsigned char)((value & 0x3f) | 0x80);
187 : : }
188 : : return 4;
189 : : }
190 [ # # ]: 0 : if(value < 0x4000000) {
191 [ # # ]: 0 : if(len < 5) return -1;
192 [ # # ]: 0 : if(str) {
193 : 0 : *str++ = (unsigned char)(((value >> 24) & 0x3) | 0xf8);
194 : 0 : *str++ = (unsigned char)(((value >> 18) & 0x3f) | 0x80);
195 : 0 : *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80);
196 : 0 : *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80);
197 : 0 : *str = (unsigned char)((value & 0x3f) | 0x80);
198 : : }
199 : : return 5;
200 : : }
201 [ # # ]: 0 : if(len < 6) return -1;
202 [ # # ]: 0 : if(str) {
203 : 0 : *str++ = (unsigned char)(((value >> 30) & 0x1) | 0xfc);
204 : 0 : *str++ = (unsigned char)(((value >> 24) & 0x3f) | 0x80);
205 : 0 : *str++ = (unsigned char)(((value >> 18) & 0x3f) | 0x80);
206 : 0 : *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80);
207 : 0 : *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80);
208 : 0 : *str = (unsigned char)((value & 0x3f) | 0x80);
209 : : }
210 : : return 6;
211 : : }
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