/* v3_prn.c */
/* 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/bio.h>
#include <openssl/conf.h>
#include <openssl/mem.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)
{
	size_t 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, ASN1_ITEM_ptr(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);
		if(value) OPENSSL_free(value);
		if(method->it) ASN1_item_free(ext_str, ASN1_ITEM_ptr(method->it));
		else method->ext_free(ext_str);
		return ok;
}

int X509V3_extensions_print(BIO *bp, const char *title, STACK_OF(X509_EXTENSION) *exts, unsigned long flag, int indent)
{
	size_t i;
	int 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, "");
			M_ASN1_OCTET_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_hexdump(out, ext->value->data, ext->value->length, indent);

		default:
		return 1;
	}
}
	

#ifndef OPENSSL_NO_FP_API
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;
}
#endif