/* $OpenBSD: x509_prn.c,v 1.7 2025/06/02 12:18:22 jsg Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 1999.
 */
/* ====================================================================
 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* X509 v3 extension utilities */

#include <stdio.h>

#include <openssl/conf.h>
#include <openssl/x509v3.h>

#include "x509_local.h"

/* Extension printing routines */

static int unknown_ext_print(BIO *out, X509_EXTENSION *ext, unsigned long flag,
    int indent, int supported);

/* Print out a name+value stack */

void
X509V3_EXT_val_prn(BIO *out, STACK_OF(CONF_VALUE) *val, int indent, int ml)
{
        int i;
        CONF_VALUE *nval;

        if (!val)
                return;
        if (!ml || !sk_CONF_VALUE_num(val)) {
                BIO_printf(out, "%*s", indent, "");
                if (!sk_CONF_VALUE_num(val))
                        BIO_puts(out, "<EMPTY>\n");
        }
        for (i = 0; i < sk_CONF_VALUE_num(val); i++) {
                if (ml)
                        BIO_printf(out, "%*s", indent, "");
                else if (i > 0)
                        BIO_printf(out, ", ");
                nval = sk_CONF_VALUE_value(val, i);
                if (!nval->name)
                        BIO_puts(out, nval->value);
                else if (!nval->value)
                        BIO_puts(out, nval->name);
                else
                        BIO_printf(out, "%s:%s", nval->name, nval->value);
                if (ml)
                        BIO_puts(out, "\n");
        }
}
LCRYPTO_ALIAS(X509V3_EXT_val_prn);

/* Main routine: print out a general extension */

int
X509V3_EXT_print(BIO *out, X509_EXTENSION *ext, unsigned long flag, int indent)
{
        void *ext_str = NULL;
        char *value = NULL;
        const unsigned char *p;
        const X509V3_EXT_METHOD *method;
        STACK_OF(CONF_VALUE) *nval = NULL;
        int ok = 1;

        if (!(method = X509V3_EXT_get(ext)))
                return unknown_ext_print(out, ext, flag, indent, 0);
        p = ext->value->data;
        if (method->it)
                ext_str = ASN1_item_d2i(NULL, &p, ext->value->length,
                    method->it);
        else
                ext_str = method->d2i(NULL, &p, ext->value->length);

        if (!ext_str)
                return unknown_ext_print(out, ext, flag, indent, 1);

        if (method->i2s) {
                if (!(value = method->i2s(method, ext_str))) {
                        ok = 0;
                        goto err;
                }
                BIO_printf(out, "%*s%s", indent, "", value);
        } else if (method->i2v) {
                if (!(nval = method->i2v(method, ext_str, NULL))) {
                        ok = 0;
                        goto err;
                }
                X509V3_EXT_val_prn(out, nval, indent,
                    method->ext_flags & X509V3_EXT_MULTILINE);
        } else if (method->i2r) {
                if (!method->i2r(method, ext_str, out, indent))
                        ok = 0;
        } else
                ok = 0;

err:
        sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
        free(value);
        if (method->it)
                ASN1_item_free(ext_str, method->it);
        else
                method->ext_free(ext_str);
        return ok;
}
LCRYPTO_ALIAS(X509V3_EXT_print);

int
X509V3_extensions_print(BIO *bp, const char *title,
    const STACK_OF(X509_EXTENSION) *exts, unsigned long flag, int indent)
{
        int i, j;

        if (sk_X509_EXTENSION_num(exts) <= 0)
                return 1;

        if (title) {
                BIO_printf(bp, "%*s%s:\n",indent, "", title);
                indent += 4;
        }

        for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
                ASN1_OBJECT *obj;
                X509_EXTENSION *ex;
                ex = sk_X509_EXTENSION_value(exts, i);
                if (indent && BIO_printf(bp, "%*s",indent, "") <= 0)
                        return 0;
                obj = X509_EXTENSION_get_object(ex);
                i2a_ASN1_OBJECT(bp, obj);
                j = X509_EXTENSION_get_critical(ex);
                if (BIO_printf(bp, ":%s\n", j ? " critical" : "") <= 0)
                        return 0;
                if (!X509V3_EXT_print(bp, ex, flag, indent + 4)) {
                        BIO_printf(bp, "%*s", indent + 4, "");
                        ASN1_STRING_print(bp, ex->value);
                }
                if (BIO_write(bp, "\n",1) <= 0)
                        return 0;
        }
        return 1;
}
LCRYPTO_ALIAS(X509V3_extensions_print);

static int
unknown_ext_print(BIO *out, X509_EXTENSION *ext, unsigned long flag,
    int indent, int supported)
{
        switch (flag & X509V3_EXT_UNKNOWN_MASK) {
        case X509V3_EXT_DEFAULT:
                return 0;
        case X509V3_EXT_ERROR_UNKNOWN:
                if (supported)
                        BIO_printf(out, "%*s<Parse Error>", indent, "");
                else
                        BIO_printf(out, "%*s<Not Supported>", indent, "");
                return 1;
        case X509V3_EXT_PARSE_UNKNOWN:
                return ASN1_parse_dump(out,
                    ext->value->data, ext->value->length, indent, -1);
        case X509V3_EXT_DUMP_UNKNOWN:
                return BIO_dump_indent(out, (char *)ext->value->data,
                    ext->value->length, indent);
        default:
                return 1;
        }
}


int
X509V3_EXT_print_fp(FILE *fp, X509_EXTENSION *ext, int flag, int indent)
{
        BIO *bio_tmp;
        int ret;

        if (!(bio_tmp = BIO_new_fp(fp, BIO_NOCLOSE)))
                return 0;
        ret = X509V3_EXT_print(bio_tmp, ext, flag, indent);
        BIO_free(bio_tmp);
        return ret;
}
LCRYPTO_ALIAS(X509V3_EXT_print_fp);