1 /*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10 #include <string.h>
11
12 #include <openssl/buf.h>
13 #include <openssl/err.h>
14 #include <openssl/mem.h>
15 #include <openssl/obj.h>
16 #include <openssl/x509.h>
17
18 #include "../internal.h"
19 #include "internal.h"
20
21
22 // Limit to ensure we don't overflow: much greater than
23 // anything enountered in practice.
24
25 #define NAME_ONELINE_MAX (1024 * 1024)
26
X509_NAME_oneline(const X509_NAME * a,char * buf,int len)27 char *X509_NAME_oneline(const X509_NAME *a, char *buf, int len) {
28 X509_NAME_ENTRY *ne;
29 size_t i;
30 int n, lold, l, l1, l2, num, j, type;
31 const char *s;
32 char *p;
33 unsigned char *q;
34 BUF_MEM *b = NULL;
35 static const char hex[17] = "0123456789ABCDEF";
36 int gs_doit[4];
37 char tmp_buf[80];
38
39 if (buf == NULL) {
40 if ((b = BUF_MEM_new()) == NULL) {
41 goto err;
42 }
43 if (!BUF_MEM_grow(b, 200)) {
44 goto err;
45 }
46 b->data[0] = '\0';
47 len = 200;
48 } else if (len <= 0) {
49 return NULL;
50 }
51 if (a == NULL) {
52 if (b) {
53 buf = b->data;
54 OPENSSL_free(b);
55 }
56 OPENSSL_strlcpy(buf, "NO X509_NAME", len);
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 OPENSSL_PUT_ERROR(X509, X509_R_NAME_TOO_LONG);
75 goto err;
76 }
77 q = ne->value->data;
78
79 if ((type == V_ASN1_GENERALSTRING) && ((num % 4) == 0)) {
80 gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 0;
81 for (j = 0; j < num; j++) {
82 if (q[j] != 0) {
83 gs_doit[j & 3] = 1;
84 }
85 }
86
87 if (gs_doit[0] | gs_doit[1] | gs_doit[2]) {
88 gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 1;
89 } else {
90 gs_doit[0] = gs_doit[1] = gs_doit[2] = 0;
91 gs_doit[3] = 1;
92 }
93 } else {
94 gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 1;
95 }
96
97 for (l2 = j = 0; j < num; j++) {
98 if (!gs_doit[j & 3]) {
99 continue;
100 }
101 l2++;
102 if ((q[j] < ' ') || (q[j] > '~')) {
103 l2 += 3;
104 }
105 }
106
107 lold = l;
108 l += 1 + l1 + 1 + l2;
109 if (l > NAME_ONELINE_MAX) {
110 OPENSSL_PUT_ERROR(X509, X509_R_NAME_TOO_LONG);
111 goto err;
112 }
113 if (b != NULL) {
114 if (!BUF_MEM_grow(b, l + 1)) {
115 goto err;
116 }
117 p = &(b->data[lold]);
118 } else if (l > len) {
119 break;
120 } else {
121 p = &(buf[lold]);
122 }
123 *(p++) = '/';
124 OPENSSL_memcpy(p, s, (unsigned int)l1);
125 p += l1;
126 *(p++) = '=';
127
128 q = ne->value->data;
129
130 for (j = 0; j < num; j++) {
131 if (!gs_doit[j & 3]) {
132 continue;
133 }
134 n = q[j];
135 if ((n < ' ') || (n > '~')) {
136 *(p++) = '\\';
137 *(p++) = 'x';
138 *(p++) = hex[(n >> 4) & 0x0f];
139 *(p++) = hex[n & 0x0f];
140 } else {
141 *(p++) = n;
142 }
143 }
144 *p = '\0';
145 }
146 if (b != NULL) {
147 p = b->data;
148 OPENSSL_free(b);
149 } else {
150 p = buf;
151 }
152 if (i == 0) {
153 *p = '\0';
154 }
155 return p;
156 err:
157 BUF_MEM_free(b);
158 return NULL;
159 }
160