/* crypto/asn1/a_print.c */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 * 

 * 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 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 acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS 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 AUTHOR OR 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.

 * 

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

#include <stdio.h>

#include "cryptlib.h"

#include <openssl/asn1.h>

EXPORT_C int ASN1_PRINTABLE_type(const unsigned char *s, int len)

	{

	int c;

	int ia5=0;

	int t61=0;

	if (len <= 0) len= -1;

	if (s == NULL) return(V_ASN1_PRINTABLESTRING);

	while ((*s) && (len-- != 0))

		{

		c= *(s++);

#ifndef CHARSET_EBCDIC

		if (!(	((c >= 'a') && (c <= 'z')) ||

			((c >= 'A') && (c <= 'Z')) ||

			(c == ' ') ||

			((c >= '0') && (c <= '9')) ||

			(c == ' ') || (c == '\'') ||

			(c == '(') || (c == ')') ||

			(c == '+') || (c == ',') ||

			(c == '-') || (c == '.') ||

			(c == '/') || (c == ':') ||

			(c == '=') || (c == '?')))

			ia5=1;

		if (c&0x80)

			t61=1;

#else

		if (!isalnum(c) && (c != ' ') &&

		    strchr("'()+,-./:=?", c) == NULL)

			ia5=1;

		if (os_toascii[c] & 0x80)

			t61=1;

#endif

		}

	if (t61) return(V_ASN1_T61STRING);

	if (ia5) return(V_ASN1_IA5STRING);

	return(V_ASN1_PRINTABLESTRING);

	}

EXPORT_C int ASN1_UNIVERSALSTRING_to_string(ASN1_UNIVERSALSTRING *s)

	{

	int i;

	unsigned char *p;

	if (s->type != V_ASN1_UNIVERSALSTRING) return(0);

	if ((s->length%4) != 0) return(0);

	p=s->data;

	for (i=0; i<s->length; i+=4)

		{

		if ((p[0] != '\0') || (p[1] != '\0') || (p[2] != '\0'))

			break;

		else

			p+=4;

		}

	if (i < s->length) return(0);

	p=s->data;

	for (i=3; i<s->length; i+=4)

		{

		*(p++)=s->data[i];

		}

	*(p)='\0';

	s->length/=4;

	s->type=ASN1_PRINTABLE_type(s->data,s->length);

	return(1);

	}