1 /* crypto/x509/x509_obj.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 #include <string.h>
59 
60 #include <openssl/buf.h>
61 #include <openssl/err.h>
62 #include <openssl/lhash.h>
63 #include <openssl/mem.h>
64 #include <openssl/obj.h>
65 #include <openssl/x509.h>
66 
67 #include "../internal.h"
68 
69 
70 /*
71  * Limit to ensure we don't overflow: much greater than
72  * anything enountered in practice.
73  */
74 
75 #define NAME_ONELINE_MAX    (1024 * 1024)
76 
X509_NAME_oneline(X509_NAME * a,char * buf,int len)77 char *X509_NAME_oneline(X509_NAME *a, char *buf, int len)
78 {
79     X509_NAME_ENTRY *ne;
80     size_t i;
81     int n, lold, l, l1, l2, num, j, type;
82     const char *s;
83     char *p;
84     unsigned char *q;
85     BUF_MEM *b = NULL;
86     static const char hex[17] = "0123456789ABCDEF";
87     int gs_doit[4];
88     char tmp_buf[80];
89 
90     if (buf == NULL) {
91         if ((b = BUF_MEM_new()) == NULL)
92             goto err;
93         if (!BUF_MEM_grow(b, 200))
94             goto err;
95         b->data[0] = '\0';
96         len = 200;
97     } else if (len <= 0) {
98         return NULL;
99     }
100     if (a == NULL) {
101         if (b) {
102             buf = b->data;
103             OPENSSL_free(b);
104         }
105         strncpy(buf, "NO X509_NAME", len);
106         buf[len - 1] = '\0';
107         return buf;
108     }
109 
110     len--;                      /* space for '\0' */
111     l = 0;
112     for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
113         ne = sk_X509_NAME_ENTRY_value(a->entries, i);
114         n = OBJ_obj2nid(ne->object);
115         if ((n == NID_undef) || ((s = OBJ_nid2sn(n)) == NULL)) {
116             i2t_ASN1_OBJECT(tmp_buf, sizeof(tmp_buf), ne->object);
117             s = tmp_buf;
118         }
119         l1 = strlen(s);
120 
121         type = ne->value->type;
122         num = ne->value->length;
123         if (num > NAME_ONELINE_MAX) {
124             OPENSSL_PUT_ERROR(X509, X509_R_NAME_TOO_LONG);
125             goto end;
126         }
127         q = ne->value->data;
128 
129         if ((type == V_ASN1_GENERALSTRING) && ((num % 4) == 0)) {
130             gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 0;
131             for (j = 0; j < num; j++)
132                 if (q[j] != 0)
133                     gs_doit[j & 3] = 1;
134 
135             if (gs_doit[0] | gs_doit[1] | gs_doit[2])
136                 gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 1;
137             else {
138                 gs_doit[0] = gs_doit[1] = gs_doit[2] = 0;
139                 gs_doit[3] = 1;
140             }
141         } else
142             gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 1;
143 
144         for (l2 = j = 0; j < num; j++) {
145             if (!gs_doit[j & 3])
146                 continue;
147             l2++;
148             if ((q[j] < ' ') || (q[j] > '~'))
149                 l2 += 3;
150         }
151 
152         lold = l;
153         l += 1 + l1 + 1 + l2;
154         if (l > NAME_ONELINE_MAX) {
155             OPENSSL_PUT_ERROR(X509, X509_R_NAME_TOO_LONG);
156             goto end;
157         }
158         if (b != NULL) {
159             if (!BUF_MEM_grow(b, l + 1))
160                 goto err;
161             p = &(b->data[lold]);
162         } else if (l > len) {
163             break;
164         } else
165             p = &(buf[lold]);
166         *(p++) = '/';
167         OPENSSL_memcpy(p, s, (unsigned int)l1);
168         p += l1;
169         *(p++) = '=';
170 
171         q = ne->value->data;
172 
173         for (j = 0; j < num; j++) {
174             if (!gs_doit[j & 3])
175                 continue;
176             n = q[j];
177             if ((n < ' ') || (n > '~')) {
178                 *(p++) = '\\';
179                 *(p++) = 'x';
180                 *(p++) = hex[(n >> 4) & 0x0f];
181                 *(p++) = hex[n & 0x0f];
182             } else
183                 *(p++) = n;
184         }
185         *p = '\0';
186     }
187     if (b != NULL) {
188         p = b->data;
189         OPENSSL_free(b);
190     } else
191         p = buf;
192     if (i == 0)
193         *p = '\0';
194     return (p);
195  err:
196     OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
197  end:
198     BUF_MEM_free(b);
199     return (NULL);
200 }
201