1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to.  The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 *    notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 *    notice, this list of conditions and the following disclaimer in the
29 *    documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 *    must display the following acknowledgement:
32 *    "This product includes cryptographic software written by
33 *     Eric Young (eay@cryptsoft.com)"
34 *    The word 'cryptographic' can be left out if the rouines from the library
35 *    being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 *    the apps directory (application code) you must include an acknowledgement:
38 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed.  i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57#include <openssl/asn1.h>
58
59#include <openssl/err.h>
60#include <openssl/mem.h>
61
62int ASN1_PRINTABLE_type(const unsigned char *s, int len)
63{
64    int c;
65    int ia5 = 0;
66    int t61 = 0;
67
68    if (len <= 0)
69        len = -1;
70    if (s == NULL)
71        return (V_ASN1_PRINTABLESTRING);
72
73    while ((*s) && (len-- != 0)) {
74        c = *(s++);
75        if (!(((c >= 'a') && (c <= 'z')) ||
76              ((c >= 'A') && (c <= 'Z')) ||
77              (c == ' ') ||
78              ((c >= '0') && (c <= '9')) ||
79              (c == ' ') || (c == '\'') ||
80              (c == '(') || (c == ')') ||
81              (c == '+') || (c == ',') ||
82              (c == '-') || (c == '.') ||
83              (c == '/') || (c == ':') || (c == '=') || (c == '?')))
84            ia5 = 1;
85        if (c & 0x80)
86            t61 = 1;
87    }
88    if (t61)
89        return (V_ASN1_T61STRING);
90    if (ia5)
91        return (V_ASN1_IA5STRING);
92    return (V_ASN1_PRINTABLESTRING);
93}
94
95int ASN1_UNIVERSALSTRING_to_string(ASN1_UNIVERSALSTRING *s)
96{
97    int i;
98    unsigned char *p;
99
100    if (s->type != V_ASN1_UNIVERSALSTRING)
101        return (0);
102    if ((s->length % 4) != 0)
103        return (0);
104    p = s->data;
105    for (i = 0; i < s->length; i += 4) {
106        if ((p[0] != '\0') || (p[1] != '\0') || (p[2] != '\0'))
107            break;
108        else
109            p += 4;
110    }
111    if (i < s->length)
112        return (0);
113    p = s->data;
114    for (i = 3; i < s->length; i += 4) {
115        *(p++) = s->data[i];
116    }
117    *(p) = '\0';
118    s->length /= 4;
119    s->type = ASN1_PRINTABLE_type(s->data, s->length);
120    return (1);
121}
122