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git.proxmox.com Git - efi-boot-shim.git/blob - Cryptlib/OpenSSL/crypto/asn1/a_utf8.c
e2dc09f6aee5701351aa047a4f2dd9f922c1a475
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #include <openssl/asn1.h>
17 * This parses a UTF8 string one character at a time. It is passed a pointer
18 * to the string and the length of the string. It sets 'value' to the value of
19 * the current character. It returns the number of characters read or a
20 * negative error code:
21 * -1 = string too short
22 * -2 = illegal character
23 * -3 = subsequent characters not of the form 10xxxxxx
24 * -4 = character encoded incorrectly (not minimal length).
27 int UTF8_getc(const unsigned char *str
, int len
, unsigned long *val
)
29 const unsigned char *p
;
36 /* Check syntax and work out the encoded value (if correct) */
37 if ((*p
& 0x80) == 0) {
40 } else if ((*p
& 0xe0) == 0xc0) {
43 if ((p
[1] & 0xc0) != 0x80)
45 value
= (*p
++ & 0x1f) << 6;
50 } else if ((*p
& 0xf0) == 0xe0) {
53 if (((p
[1] & 0xc0) != 0x80)
54 || ((p
[2] & 0xc0) != 0x80))
56 value
= (*p
++ & 0xf) << 12;
57 value
|= (*p
++ & 0x3f) << 6;
62 } else if ((*p
& 0xf8) == 0xf0) {
65 if (((p
[1] & 0xc0) != 0x80)
66 || ((p
[2] & 0xc0) != 0x80)
67 || ((p
[3] & 0xc0) != 0x80))
69 value
= ((unsigned long)(*p
++ & 0x7)) << 18;
70 value
|= (*p
++ & 0x3f) << 12;
71 value
|= (*p
++ & 0x3f) << 6;
76 } else if ((*p
& 0xfc) == 0xf8) {
79 if (((p
[1] & 0xc0) != 0x80)
80 || ((p
[2] & 0xc0) != 0x80)
81 || ((p
[3] & 0xc0) != 0x80)
82 || ((p
[4] & 0xc0) != 0x80))
84 value
= ((unsigned long)(*p
++ & 0x3)) << 24;
85 value
|= ((unsigned long)(*p
++ & 0x3f)) << 18;
86 value
|= ((unsigned long)(*p
++ & 0x3f)) << 12;
87 value
|= (*p
++ & 0x3f) << 6;
92 } else if ((*p
& 0xfe) == 0xfc) {
95 if (((p
[1] & 0xc0) != 0x80)
96 || ((p
[2] & 0xc0) != 0x80)
97 || ((p
[3] & 0xc0) != 0x80)
98 || ((p
[4] & 0xc0) != 0x80)
99 || ((p
[5] & 0xc0) != 0x80))
101 value
= ((unsigned long)(*p
++ & 0x1)) << 30;
102 value
|= ((unsigned long)(*p
++ & 0x3f)) << 24;
103 value
|= ((unsigned long)(*p
++ & 0x3f)) << 18;
104 value
|= ((unsigned long)(*p
++ & 0x3f)) << 12;
105 value
|= (*p
++ & 0x3f) << 6;
106 value
|= *p
++ & 0x3f;
107 if (value
< 0x4000000)
117 * This takes a character 'value' and writes the UTF8 encoded value in 'str'
118 * where 'str' is a buffer containing 'len' characters. Returns the number of
119 * characters written or -1 if 'len' is too small. 'str' can be set to NULL
120 * in which case it just returns the number of characters. It will need at
124 int UTF8_putc(unsigned char *str
, int len
, unsigned long value
)
127 len
= 6; /* Maximum we will need */
132 *str
= (unsigned char)value
;
139 *str
++ = (unsigned char)(((value
>> 6) & 0x1f) | 0xc0);
140 *str
= (unsigned char)((value
& 0x3f) | 0x80);
144 if (value
< 0x10000) {
148 *str
++ = (unsigned char)(((value
>> 12) & 0xf) | 0xe0);
149 *str
++ = (unsigned char)(((value
>> 6) & 0x3f) | 0x80);
150 *str
= (unsigned char)((value
& 0x3f) | 0x80);
154 if (value
< 0x200000) {
158 *str
++ = (unsigned char)(((value
>> 18) & 0x7) | 0xf0);
159 *str
++ = (unsigned char)(((value
>> 12) & 0x3f) | 0x80);
160 *str
++ = (unsigned char)(((value
>> 6) & 0x3f) | 0x80);
161 *str
= (unsigned char)((value
& 0x3f) | 0x80);
165 if (value
< 0x4000000) {
169 *str
++ = (unsigned char)(((value
>> 24) & 0x3) | 0xf8);
170 *str
++ = (unsigned char)(((value
>> 18) & 0x3f) | 0x80);
171 *str
++ = (unsigned char)(((value
>> 12) & 0x3f) | 0x80);
172 *str
++ = (unsigned char)(((value
>> 6) & 0x3f) | 0x80);
173 *str
= (unsigned char)((value
& 0x3f) | 0x80);
180 *str
++ = (unsigned char)(((value
>> 30) & 0x1) | 0xfc);
181 *str
++ = (unsigned char)(((value
>> 24) & 0x3f) | 0x80);
182 *str
++ = (unsigned char)(((value
>> 18) & 0x3f) | 0x80);
183 *str
++ = (unsigned char)(((value
>> 12) & 0x3f) | 0x80);
184 *str
++ = (unsigned char)(((value
>> 6) & 0x3f) | 0x80);
185 *str
= (unsigned char)((value
& 0x3f) | 0x80);