/* 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>

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)) {

        M_ASN1_OCTET_STRING_free(os);

        return 0;

    }

    ASN1_TYPE_set(a, V_ASN1_OCTET_STRING, os);

    return (1);

}

/* int max_len:  for returned value    */

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);

}

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    */

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);

}