/* crypto/asn1/x_x509.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/evp.h>

#include <openssl/asn1t.h>

#include <openssl/x509.h>

#include <openssl/x509v3.h>

ASN1_SEQUENCE_enc(X509_CINF, enc, 0) = {

        ASN1_EXP_OPT(X509_CINF, version, ASN1_INTEGER, 0),

        ASN1_SIMPLE(X509_CINF, serialNumber, ASN1_INTEGER),

        ASN1_SIMPLE(X509_CINF, signature, X509_ALGOR),

        ASN1_SIMPLE(X509_CINF, issuer, X509_NAME),

        ASN1_SIMPLE(X509_CINF, validity, X509_VAL),

        ASN1_SIMPLE(X509_CINF, subject, X509_NAME),

        ASN1_SIMPLE(X509_CINF, key, X509_PUBKEY),

        ASN1_IMP_OPT(X509_CINF, issuerUID, ASN1_BIT_STRING, 1),

        ASN1_IMP_OPT(X509_CINF, subjectUID, ASN1_BIT_STRING, 2),

        ASN1_EXP_SEQUENCE_OF_OPT(X509_CINF, extensions, X509_EXTENSION, 3)

} ASN1_SEQUENCE_END_enc(X509_CINF, X509_CINF)

IMPLEMENT_ASN1_FUNCTIONS(X509_CINF)

/* X509 top level structure needs a bit of customisation */

extern void policy_cache_free(X509_POLICY_CACHE *cache);

static int x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,

                   void *exarg)

{

    X509 *ret = (X509 *)*pval;

    switch (operation) {

    case ASN1_OP_NEW_POST:

        ret->valid = 0;

        ret->name = NULL;

        ret->ex_flags = 0;

        ret->ex_pathlen = -1;

        ret->skid = NULL;

        ret->akid = NULL;

#ifndef OPENSSL_NO_RFC3779

        ret->rfc3779_addr = NULL;

        ret->rfc3779_asid = NULL;

#endif

        ret->aux = NULL;

        ret->crldp = NULL;

        CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);

        break;

    case ASN1_OP_D2I_POST:

        if (ret->name != NULL)

            OPENSSL_free(ret->name);

        ret->name = X509_NAME_oneline(ret->cert_info->subject, NULL, 0);

        break;

    case ASN1_OP_FREE_POST:

        CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);

        X509_CERT_AUX_free(ret->aux);

        ASN1_OCTET_STRING_free(ret->skid);

        AUTHORITY_KEYID_free(ret->akid);

        CRL_DIST_POINTS_free(ret->crldp);

        policy_cache_free(ret->policy_cache);

        GENERAL_NAMES_free(ret->altname);

        NAME_CONSTRAINTS_free(ret->nc);

#ifndef OPENSSL_NO_RFC3779

        sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);

        ASIdentifiers_free(ret->rfc3779_asid);

#endif

        if (ret->name != NULL)

            OPENSSL_free(ret->name);

        break;

    }

    return 1;

}

ASN1_SEQUENCE_ref(X509, x509_cb, CRYPTO_LOCK_X509) = {

        ASN1_SIMPLE(X509, cert_info, X509_CINF),

        ASN1_SIMPLE(X509, sig_alg, X509_ALGOR),

        ASN1_SIMPLE(X509, signature, ASN1_BIT_STRING)

} ASN1_SEQUENCE_END_ref(X509, X509)

IMPLEMENT_ASN1_FUNCTIONS(X509)

IMPLEMENT_ASN1_DUP_FUNCTION(X509)

int X509_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,

                          CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)

{

    return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509, argl, argp,

                                   new_func, dup_func, free_func);

}

int X509_set_ex_data(X509 *r, int idx, void *arg)

{

    return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));

}

void *X509_get_ex_data(X509 *r, int idx)

{

    return (CRYPTO_get_ex_data(&r->ex_data, idx));

}

/*

 * X509_AUX ASN1 routines. X509_AUX is the name given to a certificate with

 * extra info tagged on the end. Since these functions set how a certificate

 * is trusted they should only be used when the certificate comes from a

 * reliable source such as local storage.

 */

X509 *d2i_X509_AUX(X509 **a, const unsigned char **pp, long length)

{

    const unsigned char *q;

    X509 *ret;

    int freeret = 0;

    /* Save start position */

    q = *pp;

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

        freeret = 1;

    }

    ret = d2i_X509(a, &q, length);

    /* If certificate unreadable then forget it */

    if (!ret)

        return NULL;

    /* update length */

    length -= q - *pp;

    if (length > 0 && !d2i_X509_CERT_AUX(&ret->aux, &q, length))

        goto err;

    *pp = q;

    return ret;

 err:

    if (freeret) {

        X509_free(ret);

        if (a)

            *a = NULL;

    }

    return NULL;

}

/*

 * Serialize trusted certificate to *pp or just return the required buffer

 * length if pp == NULL.  We ultimately want to avoid modifying *pp in the

 * error path, but that depends on similar hygiene in lower-level functions.

 * Here we avoid compounding the problem.

 */

static int i2d_x509_aux_internal(X509 *a, unsigned char **pp)

{

    int length, tmplen;

    unsigned char *start = pp != NULL ? *pp : NULL;

    OPENSSL_assert(pp == NULL || *pp != NULL);

    /*

     * This might perturb *pp on error, but fixing that belongs in i2d_X509()

     * not here.  It should be that if a == NULL length is zero, but we check

     * both just in case.

     */

    length = i2d_X509(a, pp);

    if (length <= 0 || a == NULL)

        return length;

    tmplen = i2d_X509_CERT_AUX(a->aux, pp);

    if (tmplen < 0) {

        if (start != NULL)

            *pp = start;

        return tmplen;

    }

    length += tmplen;

    return length;

}

/*

 * Serialize trusted certificate to *pp, or just return the required buffer

 * length if pp == NULL.

 *

 * When pp is not NULL, but *pp == NULL, we allocate the buffer, but since

 * we're writing two ASN.1 objects back to back, we can't have i2d_X509() do

 * the allocation, nor can we allow i2d_X509_CERT_AUX() to increment the

 * allocated buffer.

 */

int i2d_X509_AUX(X509 *a, unsigned char **pp)

{

    int length;

    unsigned char *tmp;

    /* Buffer provided by caller */

    if (pp == NULL || *pp != NULL)

        return i2d_x509_aux_internal(a, pp);

    /* Obtain the combined length */

    if ((length = i2d_x509_aux_internal(a, NULL)) <= 0)

        return length;

    /* Allocate requisite combined storage */

    *pp = tmp = OPENSSL_malloc(length);

    if (tmp == NULL)

        return -1; /* Push error onto error stack? */

    /* Encode, but keep *pp at the originally malloced pointer */

    length = i2d_x509_aux_internal(a, &tmp);

    if (length <= 0) {

        OPENSSL_free(*pp);

        *pp = NULL;

    }

    return length;

}

int i2d_re_X509_tbs(X509 *x, unsigned char **pp)

{

    x->cert_info->enc.modified = 1;

    return i2d_X509_CINF(x->cert_info, pp);

}

void X509_get0_signature(ASN1_BIT_STRING **psig, X509_ALGOR **palg,

                         const X509 *x)

{

    if (psig)

        *psig = x->signature;

    if (palg)

        *palg = x->sig_alg;

}

int X509_get_signature_nid(const X509 *x)

{

    return OBJ_obj2nid(x->sig_alg->algorithm);

}