/* 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