/* crypto/asn1/evp_asn1.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>

 #include <openssl/asn1_mac.h>

 EXPORT_C int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len)

 	{

 	ASN1_STRING *os;

 	if ((os=M_ASN1_OCTET_STRING_new()) == NULL) return(0);

 	if (!M_ASN1_OCTET_STRING_set(os,data,len)) return(0);

 	ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os);

 	return(1);

 	}

 /* int max_len:  for returned value    */

 EXPORT_C int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data,

 	     int max_len)

 	{

 	int ret,num;

 	unsigned char *p;

 	if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL))

 		{

 		ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING,ASN1_R_DATA_IS_WRONG);

 		return(-1);

 		}

 	p=M_ASN1_STRING_data(a->value.octet_string);

 	ret=M_ASN1_STRING_length(a->value.octet_string);

 	if (ret < max_len)

 		num=ret;

 	else

 		num=max_len;

 	memcpy(data,p,num);

 	return(ret);

 	}

 EXPORT_C int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,

 	     int len)

 	{

 	int n,size;

 	ASN1_OCTET_STRING os,*osp;

 	ASN1_INTEGER in;

 	unsigned char *p;

 	unsigned char buf[32]; /* when they have 256bit longs, 

 				* I'll be in trouble */

 	in.data=buf;

 	in.length=32;

 	os.data=data;

 	os.type=V_ASN1_OCTET_STRING;

 	os.length=len;

 	ASN1_INTEGER_set(&in,num);

 	n =  i2d_ASN1_INTEGER(&in,NULL);

 	n+=M_i2d_ASN1_OCTET_STRING(&os,NULL);

 	size=ASN1_object_size(1,n,V_ASN1_SEQUENCE);

 	if ((osp=ASN1_STRING_new()) == NULL) return(0);

 	/* Grow the 'string' */

 	if (!ASN1_STRING_set(osp,NULL,size))

 		{

 		ASN1_STRING_free(osp);

 		return(0);

 		}

 	M_ASN1_STRING_length_set(osp, size);

 	p=M_ASN1_STRING_data(osp);

 	ASN1_put_object(&p,1,n,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);

 	  i2d_ASN1_INTEGER(&in,&p);

 	M_i2d_ASN1_OCTET_STRING(&os,&p);

 	ASN1_TYPE_set(a,V_ASN1_SEQUENCE,osp);

 	return(1);

 	}

 /* we return the actual length..., num may be missing, in which

  * case, set it to zero */

 /* int max_len:  for returned value    */

 EXPORT_C int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data,

 	     int max_len)

 	{

 	int ret= -1,n;

 	ASN1_INTEGER *ai=NULL;

 	ASN1_OCTET_STRING *os=NULL;

 	const unsigned char *p;

 	long length;

 	ASN1_const_CTX c;

 	if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL))

 		{

 		goto err;

 		}

 	p=M_ASN1_STRING_data(a->value.sequence);

 	length=M_ASN1_STRING_length(a->value.sequence);

 	c.pp= &p;

 	c.p=p;

 	c.max=p+length;

 	c.error=ASN1_R_DATA_IS_WRONG;

 	M_ASN1_D2I_start_sequence();

 	c.q=c.p;

 	if ((ai=d2i_ASN1_INTEGER(NULL,&c.p,c.slen)) == NULL) goto err;

         c.slen-=(c.p-c.q);

 	c.q=c.p;

 	if ((os=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL) goto err;

         c.slen-=(c.p-c.q);

 	if (!M_ASN1_D2I_end_sequence()) goto err;

 	if (num != NULL)

 		*num=ASN1_INTEGER_get(ai);

 	ret=M_ASN1_STRING_length(os);

 	if (max_len > ret)

 		n=ret;

 	else

 		n=max_len;

 	if (data != NULL)

 		memcpy(data,M_ASN1_STRING_data(os),n);

 	if (0)

 		{

 err:

 		ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING,ASN1_R_DATA_IS_WRONG);

 		}

 	if (os != NULL) M_ASN1_OCTET_STRING_free(os);

 	if (ai != NULL) M_ASN1_INTEGER_free(ai);

 	return(ret);

 	}