/* 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 <limits.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)

 */

int i2d_ASN1_SET(STACK_OF(OPENSSL_BLOCK) *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_OPENSSL_BLOCK_num(a) - 1; i >= 0; i--) {

        int tmplen = i2d(sk_OPENSSL_BLOCK_value(a, i), NULL);

        if (tmplen > INT_MAX - ret)

            return -1;

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

    }

    r = ASN1_object_size(1, ret, ex_tag);

    if (pp == NULL || r == -1)

        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_OPENSSL_BLOCK_num(a) < 2)) {

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

            i2d(sk_OPENSSL_BLOCK_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 = OPENSSL_malloc(sk_OPENSSL_BLOCK_num(a) * sizeof(MYBLOB));

    if (rgSetBlob == NULL) {

        ASN1err(ASN1_F_I2D_ASN1_SET, ERR_R_MALLOC_FAILURE);

        return (0);

    }

    for (i = 0; i < sk_OPENSSL_BLOCK_num(a); i++) {

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

        i2d(sk_OPENSSL_BLOCK_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_OPENSSL_BLOCK_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_OPENSSL_BLOCK_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);

}

STACK_OF(OPENSSL_BLOCK) *d2i_ASN1_SET(STACK_OF(OPENSSL_BLOCK) **a,

                                      const unsigned char **pp,

                                      long length, d2i_of_void *d2i,

                                      void (*free_func) (OPENSSL_BLOCK),

                                      int ex_tag, int ex_class)

{

    ASN1_const_CTX c;

    STACK_OF(OPENSSL_BLOCK) *ret = NULL;

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

        if ((ret = sk_OPENSSL_BLOCK_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.p - *pp));

            goto err;

        }

        if (!sk_OPENSSL_BLOCK_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_OPENSSL_BLOCK_pop_free(ret, free_func);

        else

            sk_OPENSSL_BLOCK_free(ret);

    }

    return (NULL);

}

#endif