/* crypto/x509/x509_v3.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 <openssl/stack.h>

#include "cryptlib.h"

#include <openssl/asn1.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#include <openssl/x509.h>

#include <openssl/x509v3.h>

int X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x)

{

    if (x == NULL)

        return (0);

    return (sk_X509_EXTENSION_num(x));

}

int X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x, int nid,

                          int lastpos)

{

    ASN1_OBJECT *obj;

    obj = OBJ_nid2obj(nid);

    if (obj == NULL)

        return (-2);

    return (X509v3_get_ext_by_OBJ(x, obj, lastpos));

}

int X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *sk,

                          ASN1_OBJECT *obj, int lastpos)

{

    int n;

    X509_EXTENSION *ex;

    if (sk == NULL)

        return (-1);

    lastpos++;

    if (lastpos < 0)

        lastpos = 0;

    n = sk_X509_EXTENSION_num(sk);

    for (; lastpos < n; lastpos++) {

        ex = sk_X509_EXTENSION_value(sk, lastpos);

        if (OBJ_cmp(ex->object, obj) == 0)

            return (lastpos);

    }

    return (-1);

}

int X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *sk, int crit,

                               int lastpos)

{

    int n;

    X509_EXTENSION *ex;

    if (sk == NULL)

        return (-1);

    lastpos++;

    if (lastpos < 0)

        lastpos = 0;

    n = sk_X509_EXTENSION_num(sk);

    for (; lastpos < n; lastpos++) {

        ex = sk_X509_EXTENSION_value(sk, lastpos);

        if (((ex->critical > 0) && crit) || ((ex->critical <= 0) && !crit))

            return (lastpos);

    }

    return (-1);

}

X509_EXTENSION *X509v3_get_ext(const STACK_OF(X509_EXTENSION) *x, int loc)

{

    if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)

        return NULL;

    else

        return sk_X509_EXTENSION_value(x, loc);

}

X509_EXTENSION *X509v3_delete_ext(STACK_OF(X509_EXTENSION) *x, int loc)

{

    X509_EXTENSION *ret;

    if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)

        return (NULL);

    ret = sk_X509_EXTENSION_delete(x, loc);

    return (ret);

}

STACK_OF(X509_EXTENSION) *X509v3_add_ext(STACK_OF(X509_EXTENSION) **x,

                                         X509_EXTENSION *ex, int loc)

{

    X509_EXTENSION *new_ex = NULL;

    int n;

    STACK_OF(X509_EXTENSION) *sk = NULL;

    if (x == NULL) {

        X509err(X509_F_X509V3_ADD_EXT, ERR_R_PASSED_NULL_PARAMETER);

        goto err2;

    }

    if (*x == NULL) {

        if ((sk = sk_X509_EXTENSION_new_null()) == NULL)

            goto err;

    } else

        sk = *x;

    n = sk_X509_EXTENSION_num(sk);

    if (loc > n)

        loc = n;

    else if (loc < 0)

        loc = n;

    if ((new_ex = X509_EXTENSION_dup(ex)) == NULL)

        goto err2;

    if (!sk_X509_EXTENSION_insert(sk, new_ex, loc))

        goto err;

    if (*x == NULL)

        *x = sk;

    return (sk);

 err:

    X509err(X509_F_X509V3_ADD_EXT, ERR_R_MALLOC_FAILURE);

 err2:

    if (new_ex != NULL)

        X509_EXTENSION_free(new_ex);

    if (sk != NULL)

        sk_X509_EXTENSION_free(sk);

    return (NULL);

}

X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid,

                                             int crit,

                                             ASN1_OCTET_STRING *data)

{

    ASN1_OBJECT *obj;

    X509_EXTENSION *ret;

    obj = OBJ_nid2obj(nid);

    if (obj == NULL) {

        X509err(X509_F_X509_EXTENSION_CREATE_BY_NID, X509_R_UNKNOWN_NID);

        return (NULL);

    }

    ret = X509_EXTENSION_create_by_OBJ(ex, obj, crit, data);

    if (ret == NULL)

        ASN1_OBJECT_free(obj);

    return (ret);

}

X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,

                                             ASN1_OBJECT *obj, int crit,

                                             ASN1_OCTET_STRING *data)

{

    X509_EXTENSION *ret;

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

        if ((ret = X509_EXTENSION_new()) == NULL) {

            X509err(X509_F_X509_EXTENSION_CREATE_BY_OBJ,

                    ERR_R_MALLOC_FAILURE);

            return (NULL);

        }

    } else

        ret = *ex;

    if (!X509_EXTENSION_set_object(ret, obj))

        goto err;

    if (!X509_EXTENSION_set_critical(ret, crit))

        goto err;

    if (!X509_EXTENSION_set_data(ret, data))

        goto err;

    if ((ex != NULL) && (*ex == NULL))

        *ex = ret;

    return (ret);

 err:

    if ((ex == NULL) || (ret != *ex))

        X509_EXTENSION_free(ret);

    return (NULL);

}

int X509_EXTENSION_set_object(X509_EXTENSION *ex, ASN1_OBJECT *obj)

{

    if ((ex == NULL) || (obj == NULL))

        return (0);

    ASN1_OBJECT_free(ex->object);

    ex->object = OBJ_dup(obj);

    return (1);

}

int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)

{

    if (ex == NULL)

        return (0);

    ex->critical = (crit) ? 0xFF : -1;

    return (1);

}

int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data)

{

    int i;

    if (ex == NULL)

        return (0);

    i = M_ASN1_OCTET_STRING_set(ex->value, data->data, data->length);

    if (!i)

        return (0);

    return (1);

}

ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex)

{

    if (ex == NULL)

        return (NULL);

    return (ex->object);

}

ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ex)

{

    if (ex == NULL)

        return (NULL);

    return (ex->value);

}

int X509_EXTENSION_get_critical(X509_EXTENSION *ex)

{

    if (ex == NULL)

        return (0);

    if (ex->critical > 0)

        return 1;

    return 0;

}