/* crypto/asn1/f_int.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_INTEGER(BIO *bp, ASN1_INTEGER *a)

 	{

 	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->type & V_ASN1_NEG)

 		{

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

 		n = 1;

 		}

 	if (a->length == 0)

 		{

 		if (BIO_write(bp,"00",2) != 2) goto err;

 		n += 2;

 		}

 	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_INTEGER(BIO *bp, ASN1_INTEGER *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;

 	bs->type=V_ASN1_INTEGER;

 	bufsize=BIO_gets(bp,buf,size);

 	for (;;)

 		{

 		if (bufsize < 1) goto err_sl;

 		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=0; j<i; 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;

 		if (first)

 			{

 			first=0;

 			if ((bufp[0] == '0') && (buf[1] == '0'))

 				{

 				bufp+=2;

 				i-=2;

 				}

 			}

 		k=0;

 		i-=again;

 		if (i%2 != 0)

 			{

 			ASN1err(ASN1_F_A2I_ASN1_INTEGER,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=OPENSSL_realloc_clean(s,slen,num+i*2);

 			if (sp == NULL)

 				{

 				ASN1err(ASN1_F_A2I_ASN1_INTEGER,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_INTEGER,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_INTEGER,ASN1_R_SHORT_LINE);

 		}

 	return(ret);

 	}