/* $OpenBSD: v3_prn.c,v 1.19 2016/12/30 15:54:49 jsing 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>

/* 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");
	}
}

/* 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;
}

int
X509V3_extensions_print(BIO *bp, char *title, 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;
}

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;
}