1/* v3_prn.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 1999.
5 */
6/* ====================================================================
7 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in
18 *    the documentation and/or other materials provided with the
19 *    distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 *    software must display the following acknowledgment:
23 *    "This product includes software developed by the OpenSSL Project
24 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 *    endorse or promote products derived from this software without
28 *    prior written permission. For written permission, please contact
29 *    licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 *    nor may "OpenSSL" appear in their names without prior written
33 *    permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com). */
57
58/* X509 v3 extension utilities */
59
60#include <stdio.h>
61
62#include <openssl/bio.h>
63#include <openssl/conf.h>
64#include <openssl/mem.h>
65#include <openssl/x509v3.h>
66
67/* Extension printing routines */
68
69static int unknown_ext_print(BIO *out, X509_EXTENSION *ext,
70                             unsigned long flag, int indent, int supported);
71
72/* Print out a name+value stack */
73
74void X509V3_EXT_val_prn(BIO *out, STACK_OF(CONF_VALUE) *val, int indent,
75                        int ml)
76{
77    size_t i;
78    CONF_VALUE *nval;
79    if (!val)
80        return;
81    if (!ml || !sk_CONF_VALUE_num(val)) {
82        BIO_printf(out, "%*s", indent, "");
83        if (!sk_CONF_VALUE_num(val))
84            BIO_puts(out, "<EMPTY>\n");
85    }
86    for (i = 0; i < sk_CONF_VALUE_num(val); i++) {
87        if (ml)
88            BIO_printf(out, "%*s", indent, "");
89        else if (i > 0)
90            BIO_printf(out, ", ");
91        nval = sk_CONF_VALUE_value(val, i);
92        if (!nval->name)
93            BIO_puts(out, nval->value);
94        else if (!nval->value)
95            BIO_puts(out, nval->name);
96        else
97            BIO_printf(out, "%s:%s", nval->name, nval->value);
98        if (ml)
99            BIO_puts(out, "\n");
100    }
101}
102
103/* Main routine: print out a general extension */
104
105int X509V3_EXT_print(BIO *out, X509_EXTENSION *ext, unsigned long flag,
106                     int indent)
107{
108    void *ext_str = NULL;
109    char *value = NULL;
110    const unsigned char *p;
111    const X509V3_EXT_METHOD *method;
112    STACK_OF(CONF_VALUE) *nval = NULL;
113    int ok = 1;
114
115    if (!(method = X509V3_EXT_get(ext)))
116        return unknown_ext_print(out, ext, flag, indent, 0);
117    p = ext->value->data;
118    if (method->it)
119        ext_str =
120            ASN1_item_d2i(NULL, &p, ext->value->length,
121                          ASN1_ITEM_ptr(method->it));
122    else
123        ext_str = method->d2i(NULL, &p, ext->value->length);
124
125    if (!ext_str)
126        return unknown_ext_print(out, ext, flag, indent, 1);
127
128    if (method->i2s) {
129        if (!(value = method->i2s(method, ext_str))) {
130            ok = 0;
131            goto err;
132        }
133        BIO_printf(out, "%*s%s", indent, "", value);
134    } else if (method->i2v) {
135        if (!(nval = method->i2v(method, ext_str, NULL))) {
136            ok = 0;
137            goto err;
138        }
139        X509V3_EXT_val_prn(out, nval, indent,
140                           method->ext_flags & X509V3_EXT_MULTILINE);
141    } else if (method->i2r) {
142        if (!method->i2r(method, ext_str, out, indent))
143            ok = 0;
144    } else
145        ok = 0;
146
147 err:
148    sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
149    if (value)
150        OPENSSL_free(value);
151    if (method->it)
152        ASN1_item_free(ext_str, ASN1_ITEM_ptr(method->it));
153    else
154        method->ext_free(ext_str);
155    return ok;
156}
157
158int X509V3_extensions_print(BIO *bp, const char *title,
159                            STACK_OF(X509_EXTENSION) *exts,
160                            unsigned long flag, int indent)
161{
162    size_t i;
163    int j;
164
165    if (sk_X509_EXTENSION_num(exts) <= 0)
166        return 1;
167
168    if (title) {
169        BIO_printf(bp, "%*s%s:\n", indent, "", title);
170        indent += 4;
171    }
172
173    for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
174        ASN1_OBJECT *obj;
175        X509_EXTENSION *ex;
176        ex = sk_X509_EXTENSION_value(exts, i);
177        if (indent && BIO_printf(bp, "%*s", indent, "") <= 0)
178            return 0;
179        obj = X509_EXTENSION_get_object(ex);
180        i2a_ASN1_OBJECT(bp, obj);
181        j = X509_EXTENSION_get_critical(ex);
182        if (BIO_printf(bp, ": %s\n", j ? "critical" : "") <= 0)
183            return 0;
184        if (!X509V3_EXT_print(bp, ex, flag, indent + 4)) {
185            BIO_printf(bp, "%*s", indent + 4, "");
186            M_ASN1_OCTET_STRING_print(bp, ex->value);
187        }
188        if (BIO_write(bp, "\n", 1) <= 0)
189            return 0;
190    }
191    return 1;
192}
193
194static int unknown_ext_print(BIO *out, X509_EXTENSION *ext,
195                             unsigned long flag, int indent, int supported)
196{
197    switch (flag & X509V3_EXT_UNKNOWN_MASK) {
198
199    case X509V3_EXT_DEFAULT:
200        return 0;
201
202    case X509V3_EXT_ERROR_UNKNOWN:
203        if (supported)
204            BIO_printf(out, "%*s<Parse Error>", indent, "");
205        else
206            BIO_printf(out, "%*s<Not Supported>", indent, "");
207        return 1;
208
209    case X509V3_EXT_PARSE_UNKNOWN:
210    case X509V3_EXT_DUMP_UNKNOWN:
211        return BIO_hexdump(out, ext->value->data, ext->value->length, indent);
212
213    default:
214        return 1;
215    }
216}
217
218#ifndef OPENSSL_NO_FP_API
219int X509V3_EXT_print_fp(FILE *fp, X509_EXTENSION *ext, int flag, int indent)
220{
221    BIO *bio_tmp;
222    int ret;
223    if (!(bio_tmp = BIO_new_fp(fp, BIO_NOCLOSE)))
224        return 0;
225    ret = X509V3_EXT_print(bio_tmp, ext, flag, indent);
226    BIO_free(bio_tmp);
227    return ret;
228}
229#endif
230