/* crypto/asn1/f_string.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.]

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include <stdio.h>

#include "cryptlib.h"

#include <openssl/buffer.h>

#include <openssl/asn1.h>

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

EXPORT_C int i2a_ASN1_STRING(BIO *bp, ASN1_STRING *a, int type)

	{

	int i,n=0;

#ifndef EMULATOR

	static const char *h="0123456789ABCDEF";

#else	

   static const char *const h="0123456789ABCDEF";

#endif

	char buf[2];

	if (a == NULL) return(0);

	if (a->length == 0)

		{

		if (BIO_write(bp,"0",1) != 1) goto err;

		n=1;

		}

	else

		{

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

			{

			if ((i != 0) && (i%35 == 0))

				{

				if (BIO_write(bp,"\\\n",2) != 2) goto err;

				n+=2;

				}

			buf[0]=h[((unsigned char)a->data[i]>>4)&0x0f];

			buf[1]=h[((unsigned char)a->data[i]   )&0x0f];

			if (BIO_write(bp,buf,2) != 2) goto err;

			n+=2;

			}

		}

	return(n);

err:

	return(-1);

	}

EXPORT_C int a2i_ASN1_STRING(BIO *bp, ASN1_STRING *bs, char *buf, int size)

	{

	int ret=0;

	int i,j,k,m,n,again,bufsize;

	unsigned char *s=NULL,*sp;

	unsigned char *bufp;

	int num=0,slen=0,first=1;

	bufsize=BIO_gets(bp,buf,size);

	for (;;)

		{

		if (bufsize < 1)

			{

			if (first)

				break;

			else

				goto err_sl;

			}

		first=0;

		i=bufsize;

		if (buf[i-1] == '\n') buf[--i]='\0';

		if (i == 0) goto err_sl;

		if (buf[i-1] == '\r') buf[--i]='\0';

		if (i == 0) goto err_sl;

		again=(buf[i-1] == '\\');

		for (j=i-1; j>0; j--)

			{

#ifndef CHARSET_EBCDIC

			if (!(	((buf[j] >= '0') && (buf[j] <= '9')) ||

				((buf[j] >= 'a') && (buf[j] <= 'f')) ||

				((buf[j] >= 'A') && (buf[j] <= 'F'))))

#else

			/* This #ifdef is not strictly necessary, since

			 * the characters A...F a...f 0...9 are contiguous

			 * (yes, even in EBCDIC - but not the whole alphabet).

			 * Nevertheless, isxdigit() is faster.

			 */

			if (!isxdigit(buf[j]))

#endif

				{

				i=j;

				break;

				}

			}

		buf[i]='\0';

		/* We have now cleared all the crap off the end of the

		 * line */

		if (i < 2) goto err_sl;

		bufp=(unsigned char *)buf;

		k=0;

		i-=again;

		if (i%2 != 0)

			{

			ASN1err(ASN1_F_A2I_ASN1_STRING,ASN1_R_ODD_NUMBER_OF_CHARS);

			goto err;

			}

		i/=2;

		if (num+i > slen)

			{

			if (s == NULL)

				sp=(unsigned char *)OPENSSL_malloc(

					(unsigned int)num+i*2);

			else

				sp=(unsigned char *)OPENSSL_realloc(s,

					(unsigned int)num+i*2);

			if (sp == NULL)

				{

				ASN1err(ASN1_F_A2I_ASN1_STRING,ERR_R_MALLOC_FAILURE);

				if (s != NULL) OPENSSL_free(s);

				goto err;

				}

			s=sp;

			slen=num+i*2;

			}

		for (j=0; j<i; j++,k+=2)

			{

			for (n=0; n<2; n++)

				{

				m=bufp[k+n];

				if ((m >= '0') && (m <= '9'))

					m-='0';

				else if ((m >= 'a') && (m <= 'f'))

					m=m-'a'+10;

				else if ((m >= 'A') && (m <= 'F'))

					m=m-'A'+10;

				else

					{

					ASN1err(ASN1_F_A2I_ASN1_STRING,ASN1_R_NON_HEX_CHARACTERS);

					goto err;

					}

				s[num+j]<<=4;

				s[num+j]|=m;

				}

			}

		num+=i;

		if (again)

			bufsize=BIO_gets(bp,buf,size);

		else

			break;

		}

	bs->length=num;

	bs->data=s;

	ret=1;

err:

	if (0)

		{

err_sl:

		ASN1err(ASN1_F_A2I_ASN1_STRING,ASN1_R_SHORT_LINE);

		}

	return(ret);

	}