1/*
2 * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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
8 */
9
10#include <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/objects.h>
13#include <openssl/x509.h>
14#include <openssl/buffer.h>
15#include "crypto/x509.h"
16
17/*
18 * Limit to ensure we don't overflow: much greater than
19 * anything encountered in practice.
20 */
21
22#define NAME_ONELINE_MAX (1024 * 1024)
23
24char *X509_NAME_oneline(const X509_NAME *a, char *buf, int len)
25{
26 const X509_NAME_ENTRY *ne;
27 int i;
28 int n, lold, l, l1, l2, num, j, type;
29 const char *s;
30 char *p;
31 unsigned char *q;
32 BUF_MEM *b = NULL;
33 static const char hex[17] = "0123456789ABCDEF";
34 int gs_doit[4];
35 char tmp_buf[80];
36#ifdef CHARSET_EBCDIC
37 unsigned char ebcdic_buf[1024];
38#endif
39
40 if (buf == NULL) {
41 if ((b = BUF_MEM_new()) == NULL)
42 goto err;
43 if (!BUF_MEM_grow(b, 200))
44 goto err;
45 b->data[0] = '\0';
46 len = 200;
47 } else if (len == 0) {
48 return NULL;
49 }
50 if (a == NULL) {
51 if (b) {
52 buf = b->data;
53 OPENSSL_free(b);
54 }
55 strncpy(buf, "NO X509_NAME", len);
56 buf[len - 1] = '\0';
57 return buf;
58 }
59
60 len--; /* space for '\0' */
61 l = 0;
62 for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
63 ne = sk_X509_NAME_ENTRY_value(a->entries, i);
64 n = OBJ_obj2nid(ne->object);
65 if ((n == NID_undef) || ((s = OBJ_nid2sn(n)) == NULL)) {
66 i2t_ASN1_OBJECT(tmp_buf, sizeof(tmp_buf), ne->object);
67 s = tmp_buf;
68 }
69 l1 = strlen(s);
70
71 type = ne->value->type;
72 num = ne->value->length;
73 if (num > NAME_ONELINE_MAX) {
74 X509err(X509_F_X509_NAME_ONELINE, X509_R_NAME_TOO_LONG);
75 goto end;
76 }
77 q = ne->value->data;
78#ifdef CHARSET_EBCDIC
79 if (type == V_ASN1_GENERALSTRING ||
80 type == V_ASN1_VISIBLESTRING ||
81 type == V_ASN1_PRINTABLESTRING ||
82 type == V_ASN1_TELETEXSTRING ||
83 type == V_ASN1_IA5STRING) {
84 if (num > (int)sizeof(ebcdic_buf))
85 num = sizeof(ebcdic_buf);
86 ascii2ebcdic(ebcdic_buf, q, num);
87 q = ebcdic_buf;
88 }
89#endif
90
91 if ((type == V_ASN1_GENERALSTRING) && ((num % 4) == 0)) {
92 gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 0;
93 for (j = 0; j < num; j++)
94 if (q[j] != 0)
95 gs_doit[j & 3] = 1;
96
97 if (gs_doit[0] | gs_doit[1] | gs_doit[2])
98 gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 1;
99 else {
100 gs_doit[0] = gs_doit[1] = gs_doit[2] = 0;
101 gs_doit[3] = 1;
102 }
103 } else
104 gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 1;
105
106 for (l2 = j = 0; j < num; j++) {
107 if (!gs_doit[j & 3])
108 continue;
109 l2++;
110#ifndef CHARSET_EBCDIC
111 if ((q[j] < ' ') || (q[j] > '~'))
112 l2 += 3;
113#else
114 if ((os_toascii[q[j]] < os_toascii[' ']) ||
115 (os_toascii[q[j]] > os_toascii['~']))
116 l2 += 3;
117#endif
118 }
119
120 lold = l;
121 l += 1 + l1 + 1 + l2;
122 if (l > NAME_ONELINE_MAX) {
123 X509err(X509_F_X509_NAME_ONELINE, X509_R_NAME_TOO_LONG);
124 goto end;
125 }
126 if (b != NULL) {
127 if (!BUF_MEM_grow(b, l + 1))
128 goto err;
129 p = &(b->data[lold]);
130 } else if (l > len) {
131 break;
132 } else
133 p = &(buf[lold]);
134 *(p++) = '/';
135 memcpy(p, s, (unsigned int)l1);
136 p += l1;
137 *(p++) = '=';
138
139#ifndef CHARSET_EBCDIC /* q was assigned above already. */
140 q = ne->value->data;
141#endif
142
143 for (j = 0; j < num; j++) {
144 if (!gs_doit[j & 3])
145 continue;
146#ifndef CHARSET_EBCDIC
147 n = q[j];
148 if ((n < ' ') || (n > '~')) {
149 *(p++) = '\\';
150 *(p++) = 'x';
151 *(p++) = hex[(n >> 4) & 0x0f];
152 *(p++) = hex[n & 0x0f];
153 } else
154 *(p++) = n;
155#else
156 n = os_toascii[q[j]];
157 if ((n < os_toascii[' ']) || (n > os_toascii['~'])) {
158 *(p++) = '\\';
159 *(p++) = 'x';
160 *(p++) = hex[(n >> 4) & 0x0f];
161 *(p++) = hex[n & 0x0f];
162 } else
163 *(p++) = q[j];
164#endif
165 }
166 *p = '\0';
167 }
168 if (b != NULL) {
169 p = b->data;
170 OPENSSL_free(b);
171 } else
172 p = buf;
173 if (i == 0)
174 *p = '\0';
175 return p;
176 err:
177 X509err(X509_F_X509_NAME_ONELINE, ERR_R_MALLOC_FAILURE);
178 end:
179 BUF_MEM_free(b);
180 return NULL;
181}
182