1/*
2 * Copyright 1999-2016 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/* X509 v3 extension utilities */
11
12#include <stdio.h>
13#include "internal/cryptlib.h"
14#include <openssl/conf.h>
15#include <openssl/x509v3.h>
16
17/* Extension printing routines */
18
19static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen,
20 unsigned long flag, int indent, int supported);
21
22/* Print out a name+value stack */
23
24void X509V3_EXT_val_prn(BIO *out, STACK_OF(CONF_VALUE) *val, int indent,
25 int ml)
26{
27 int i;
28 CONF_VALUE *nval;
29 if (!val)
30 return;
31 if (!ml || !sk_CONF_VALUE_num(val)) {
32 BIO_printf(out, "%*s", indent, "");
33 if (!sk_CONF_VALUE_num(val))
34 BIO_puts(out, "<EMPTY>\n");
35 }
36 for (i = 0; i < sk_CONF_VALUE_num(val); i++) {
37 if (ml) {
38 if (i > 0)
39 BIO_printf(out, "\n");
40 BIO_printf(out, "%*s", indent, "");
41 }
42 else if (i > 0)
43 BIO_printf(out, ", ");
44 nval = sk_CONF_VALUE_value(val, i);
45 if (!nval->name)
46 BIO_puts(out, nval->value);
47 else if (!nval->value)
48 BIO_puts(out, nval->name);
49#ifndef CHARSET_EBCDIC
50 else
51 BIO_printf(out, "%s:%s", nval->name, nval->value);
52#else
53 else {
54 int len;
55 char *tmp;
56 len = strlen(nval->value) + 1;
57 tmp = OPENSSL_malloc(len);
58 if (tmp != NULL) {
59 ascii2ebcdic(tmp, nval->value, len);
60 BIO_printf(out, "%s:%s", nval->name, tmp);
61 OPENSSL_free(tmp);
62 }
63 }
64#endif
65 }
66}
67
68/* Main routine: print out a general extension */
69
70int X509V3_EXT_print(BIO *out, X509_EXTENSION *ext, unsigned long flag,
71 int indent)
72{
73 void *ext_str = NULL;
74 char *value = NULL;
75 ASN1_OCTET_STRING *extoct;
76 const unsigned char *p;
77 int extlen;
78 const X509V3_EXT_METHOD *method;
79 STACK_OF(CONF_VALUE) *nval = NULL;
80 int ok = 1;
81
82 extoct = X509_EXTENSION_get_data(ext);
83 p = ASN1_STRING_get0_data(extoct);
84 extlen = ASN1_STRING_length(extoct);
85
86 if ((method = X509V3_EXT_get(ext)) == NULL)
87 return unknown_ext_print(out, p, extlen, flag, indent, 0);
88 if (method->it)
89 ext_str = ASN1_item_d2i(NULL, &p, extlen, ASN1_ITEM_ptr(method->it));
90 else
91 ext_str = method->d2i(NULL, &p, extlen);
92
93 if (!ext_str)
94 return unknown_ext_print(out, p, extlen, flag, indent, 1);
95
96 if (method->i2s) {
97 if ((value = method->i2s(method, ext_str)) == NULL) {
98 ok = 0;
99 goto err;
100 }
101#ifndef CHARSET_EBCDIC
102 BIO_printf(out, "%*s%s", indent, "", value);
103#else
104 {
105 int len;
106 char *tmp;
107 len = strlen(value) + 1;
108 tmp = OPENSSL_malloc(len);
109 if (tmp != NULL) {
110 ascii2ebcdic(tmp, value, len);
111 BIO_printf(out, "%*s%s", indent, "", tmp);
112 OPENSSL_free(tmp);
113 }
114 }
115#endif
116 } else if (method->i2v) {
117 if ((nval = method->i2v(method, ext_str, NULL)) == NULL) {
118 ok = 0;
119 goto err;
120 }
121 X509V3_EXT_val_prn(out, nval, indent,
122 method->ext_flags & X509V3_EXT_MULTILINE);
123 } else if (method->i2r) {
124 if (!method->i2r(method, ext_str, out, indent))
125 ok = 0;
126 } else
127 ok = 0;
128
129 err:
130 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
131 OPENSSL_free(value);
132 if (method->it)
133 ASN1_item_free(ext_str, ASN1_ITEM_ptr(method->it));
134 else
135 method->ext_free(ext_str);
136 return ok;
137}
138
139int X509V3_extensions_print(BIO *bp, const char *title,
140 const STACK_OF(X509_EXTENSION) *exts,
141 unsigned long flag, int indent)
142{
143 int i, j;
144
145 if (sk_X509_EXTENSION_num(exts) <= 0)
146 return 1;
147
148 if (title) {
149 BIO_printf(bp, "%*s%s:\n", indent, "", title);
150 indent += 4;
151 }
152
153 for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
154 ASN1_OBJECT *obj;
155 X509_EXTENSION *ex;
156 ex = sk_X509_EXTENSION_value(exts, i);
157 if (indent && BIO_printf(bp, "%*s", indent, "") <= 0)
158 return 0;
159 obj = X509_EXTENSION_get_object(ex);
160 i2a_ASN1_OBJECT(bp, obj);
161 j = X509_EXTENSION_get_critical(ex);
162 if (BIO_printf(bp, ": %s\n", j ? "critical" : "") <= 0)
163 return 0;
164 if (!X509V3_EXT_print(bp, ex, flag, indent + 4)) {
165 BIO_printf(bp, "%*s", indent + 4, "");
166 ASN1_STRING_print(bp, X509_EXTENSION_get_data(ex));
167 }
168 if (BIO_write(bp, "\n", 1) <= 0)
169 return 0;
170 }
171 return 1;
172}
173
174static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen,
175 unsigned long flag, int indent, int supported)
176{
177 switch (flag & X509V3_EXT_UNKNOWN_MASK) {
178
179 case X509V3_EXT_DEFAULT:
180 return 0;
181
182 case X509V3_EXT_ERROR_UNKNOWN:
183 if (supported)
184 BIO_printf(out, "%*s<Parse Error>", indent, "");
185 else
186 BIO_printf(out, "%*s<Not Supported>", indent, "");
187 return 1;
188
189 case X509V3_EXT_PARSE_UNKNOWN:
190 return ASN1_parse_dump(out, ext, extlen, indent, -1);
191 case X509V3_EXT_DUMP_UNKNOWN:
192 return BIO_dump_indent(out, (const char *)ext, extlen, indent);
193
194 default:
195 return 1;
196 }
197}
198
199#ifndef OPENSSL_NO_STDIO
200int X509V3_EXT_print_fp(FILE *fp, X509_EXTENSION *ext, int flag, int indent)
201{
202 BIO *bio_tmp;
203 int ret;
204
205 if ((bio_tmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL)
206 return 0;
207 ret = X509V3_EXT_print(bio_tmp, ext, flag, indent);
208 BIO_free(bio_tmp);
209 return ret;
210}
211#endif
212