/* crypto/asn1/a_set.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_mac.h>

#ifndef NO_ASN1_OLD

typedef struct

    {

    unsigned char *pbData;

    int cbData;

    } MYBLOB;

/* SetBlobCmp

 * This function compares two elements of SET_OF block

 */

static int SetBlobCmp(const void *elem1, const void *elem2 )

    {

    const MYBLOB *b1 = (const MYBLOB *)elem1;

    const MYBLOB *b2 = (const MYBLOB *)elem2;

    int r;

    r = memcmp(b1->pbData, b2->pbData,

	       b1->cbData < b2->cbData ? b1->cbData : b2->cbData);

    if(r != 0)

	return r;

    return b1->cbData-b2->cbData;

    }

/* int is_set:  if TRUE, then sort the contents (i.e. it isn't a SEQUENCE)    */

EXPORT_C int i2d_ASN1_SET(STACK *a, unsigned char **pp, i2d_of_void *i2d, int ex_tag,

		 int ex_class, int is_set)

	{

	int ret=0,r;

	int i;

	unsigned char *p;

        unsigned char *pStart, *pTempMem;

        MYBLOB *rgSetBlob;

        int totSize;

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

	for (i=sk_num(a)-1; i>=0; i--)

		ret+=i2d(sk_value(a,i),NULL);

	r=ASN1_object_size(1,ret,ex_tag);

	if (pp == NULL) return(r);

	p= *pp;

	ASN1_put_object(&p,1,ret,ex_tag,ex_class);

/* Modified by gp@nsj.co.jp */

	/* And then again by Ben */

	/* And again by Steve */

	if(!is_set || (sk_num(a) < 2))

		{

		for (i=0; i<sk_num(a); i++)

                	i2d(sk_value(a,i),&p);

		*pp=p;

		return(r);

		}

        pStart  = p; /* Catch the beg of Setblobs*/

		/* In this array we will store the SET blobs */

		rgSetBlob = (MYBLOB *)OPENSSL_malloc(sk_num(a) * sizeof(MYBLOB));

		if (rgSetBlob == NULL)

			{

			ASN1err(ASN1_F_I2D_ASN1_SET,ERR_R_MALLOC_FAILURE);

			return(0);

			}

        for (i=0; i<sk_num(a); i++)

	        {

                rgSetBlob[i].pbData = p;  /* catch each set encode blob */

                i2d(sk_value(a,i),&p);

                rgSetBlob[i].cbData = p - rgSetBlob[i].pbData; /* Length of this

SetBlob

*/

		}

        *pp=p;

        totSize = p - pStart; /* This is the total size of all set blobs */

 /* Now we have to sort the blobs. I am using a simple algo.

    *Sort ptrs *Copy to temp-mem *Copy from temp-mem to user-mem*/

        qsort( rgSetBlob, sk_num(a), sizeof(MYBLOB), SetBlobCmp);

		if (!(pTempMem = OPENSSL_malloc(totSize)))

			{

			ASN1err(ASN1_F_I2D_ASN1_SET,ERR_R_MALLOC_FAILURE);

			return(0);

			}

/* Copy to temp mem */

        p = pTempMem;

        for(i=0; i<sk_num(a); ++i)

		{

                memcpy(p, rgSetBlob[i].pbData, rgSetBlob[i].cbData);

                p += rgSetBlob[i].cbData;

		}

/* Copy back to user mem*/

        memcpy(pStart, pTempMem, totSize);

        OPENSSL_free(pTempMem);

        OPENSSL_free(rgSetBlob);

        return(r);

        }

EXPORT_C STACK *d2i_ASN1_SET(STACK **a, const unsigned char **pp, long length,

		    d2i_of_void *d2i, void (*free_func)(void *), int ex_tag,

		    int ex_class)

	{

	ASN1_const_CTX c;

	STACK *ret=NULL;

	if ((a == NULL) || ((*a) == NULL))

		{

		if ((ret=sk_new_null()) == NULL)

			{

			ASN1err(ASN1_F_D2I_ASN1_SET,ERR_R_MALLOC_FAILURE);

			goto err;

			}

		}

	else

		ret=(*a);

	c.p= *pp;

	c.max=(length == 0)?0:(c.p+length);

	c.inf=ASN1_get_object(&c.p,&c.slen,&c.tag,&c.xclass,c.max-c.p);

	if (c.inf & 0x80) goto err;

	if (ex_class != c.xclass)

		{

		ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_BAD_CLASS);

		goto err;

		}

	if (ex_tag != c.tag)

		{

		ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_BAD_TAG);

		goto err;

		}

	if ((c.slen+c.p) > c.max)

		{

		ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_LENGTH_ERROR);

		goto err;

		}

	/* check for infinite constructed - it can be as long

	 * as the amount of data passed to us */

	if (c.inf == (V_ASN1_CONSTRUCTED+1))

		c.slen=length+ *pp-c.p;

	c.max=c.p+c.slen;

	while (c.p < c.max)

		{

		char *s;

		if (M_ASN1_D2I_end_sequence()) break;

		/* XXX: This was called with 4 arguments, incorrectly, it seems

		   if ((s=func(NULL,&c.p,c.slen,c.max-c.p)) == NULL) */

		if ((s=d2i(NULL,&c.p,c.slen)) == NULL)

			{

			ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_ERROR_PARSING_SET_ELEMENT);

			asn1_add_error(*pp,(int)(c.q- *pp));

			goto err;

			}

		if (!sk_push(ret,s)) goto err;

		}

	if (a != NULL) (*a)=ret;

	*pp=c.p;

	return(ret);

err:

	if ((ret != NULL) && ((a == NULL) || (*a != ret)))

		{

		if (free_func != NULL)

			sk_pop_free(ret,free_func);

		else

			sk_free(ret);

		}

	return(NULL);

	}

#endif