/* crypto/x509/x509_req.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/bn.h>

#include <openssl/evp.h>

#include <openssl/asn1.h>

#include <openssl/asn1t.h>

#include <openssl/x509.h>

#include <openssl/objects.h>

#include <openssl/buffer.h>

#include <openssl/pem.h>

X509_REQ *X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md)

{

    X509_REQ *ret;

    X509_REQ_INFO *ri;

    int i;

    EVP_PKEY *pktmp;

    ret = X509_REQ_new();

    if (ret == NULL) {

        X509err(X509_F_X509_TO_X509_REQ, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    ri = ret->req_info;

    ri->version->length = 1;

    ri->version->data = (unsigned char *)OPENSSL_malloc(1);

    if (ri->version->data == NULL)

        goto err;

    ri->version->data[0] = 0;   /* version == 0 */

    if (!X509_REQ_set_subject_name(ret, X509_get_subject_name(x)))

        goto err;

    pktmp = X509_get_pubkey(x);

    if (pktmp == NULL)

        goto err;

    i = X509_REQ_set_pubkey(ret, pktmp);

    EVP_PKEY_free(pktmp);

    if (!i)

        goto err;

    if (pkey != NULL) {

        if (!X509_REQ_sign(ret, pkey, md))

            goto err;

    }

    return (ret);

 err:

    X509_REQ_free(ret);

    return (NULL);

}

EVP_PKEY *X509_REQ_get_pubkey(X509_REQ *req)

{

    if ((req == NULL) || (req->req_info == NULL))

        return (NULL);

    return (X509_PUBKEY_get(req->req_info->pubkey));

}

int X509_REQ_check_private_key(X509_REQ *x, EVP_PKEY *k)

{

    EVP_PKEY *xk = NULL;

    int ok = 0;

    xk = X509_REQ_get_pubkey(x);

    switch (EVP_PKEY_cmp(xk, k)) {

    case 1:

        ok = 1;

        break;

    case 0:

        X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY,

                X509_R_KEY_VALUES_MISMATCH);

        break;

    case -1:

        X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, X509_R_KEY_TYPE_MISMATCH);

        break;

    case -2:

#ifndef OPENSSL_NO_EC

        if (k->type == EVP_PKEY_EC) {

            X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, ERR_R_EC_LIB);

            break;

        }

#endif

#ifndef OPENSSL_NO_DH

        if (k->type == EVP_PKEY_DH) {

            /* No idea */

            X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY,

                    X509_R_CANT_CHECK_DH_KEY);

            break;

        }

#endif

        X509err(X509_F_X509_REQ_CHECK_PRIVATE_KEY, X509_R_UNKNOWN_KEY_TYPE);

    }

    EVP_PKEY_free(xk);

    return (ok);

}

/*

 * It seems several organisations had the same idea of including a list of

 * extensions in a certificate request. There are at least two OIDs that are

 * used and there may be more: so the list is configurable.

 */

static int ext_nid_list[] = { NID_ext_req, NID_ms_ext_req, NID_undef };

static int *ext_nids = ext_nid_list;

int X509_REQ_extension_nid(int req_nid)

{

    int i, nid;

    for (i = 0;; i++) {

        nid = ext_nids[i];

        if (nid == NID_undef)

            return 0;

        else if (req_nid == nid)

            return 1;

    }

}

int *X509_REQ_get_extension_nids(void)

{

    return ext_nids;

}

void X509_REQ_set_extension_nids(int *nids)

{

    ext_nids = nids;

}

STACK_OF(X509_EXTENSION) *X509_REQ_get_extensions(X509_REQ *req)

{

    X509_ATTRIBUTE *attr;

    ASN1_TYPE *ext = NULL;

    int idx, *pnid;

    const unsigned char *p;

    if ((req == NULL) || (req->req_info == NULL) || !ext_nids)

        return (NULL);

    for (pnid = ext_nids; *pnid != NID_undef; pnid++) {

        idx = X509_REQ_get_attr_by_NID(req, *pnid, -1);

        if (idx == -1)

            continue;

        attr = X509_REQ_get_attr(req, idx);

        if (attr->single)

            ext = attr->value.single;

        else if (sk_ASN1_TYPE_num(attr->value.set))

            ext = sk_ASN1_TYPE_value(attr->value.set, 0);

        break;

    }

    if (!ext || (ext->type != V_ASN1_SEQUENCE))

        return NULL;

    p = ext->value.sequence->data;

    return (STACK_OF(X509_EXTENSION) *)

        ASN1_item_d2i(NULL, &p, ext->value.sequence->length,

                      ASN1_ITEM_rptr(X509_EXTENSIONS));

}

/*

 * Add a STACK_OF extensions to a certificate request: allow alternative OIDs

 * in case we want to create a non standard one.

 */

int X509_REQ_add_extensions_nid(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts,

                                int nid)

{

    ASN1_TYPE *at = NULL;

    X509_ATTRIBUTE *attr = NULL;

    if (!(at = ASN1_TYPE_new()) || !(at->value.sequence = ASN1_STRING_new()))

        goto err;

    at->type = V_ASN1_SEQUENCE;

    /* Generate encoding of extensions */

    at->value.sequence->length =

        ASN1_item_i2d((ASN1_VALUE *)exts,

                      &at->value.sequence->data,

                      ASN1_ITEM_rptr(X509_EXTENSIONS));

    if (!(attr = X509_ATTRIBUTE_new()))

        goto err;

    if (!(attr->value.set = sk_ASN1_TYPE_new_null()))

        goto err;

    if (!sk_ASN1_TYPE_push(attr->value.set, at))

        goto err;

    at = NULL;

    attr->single = 0;

    attr->object = OBJ_nid2obj(nid);

    if (!req->req_info->attributes) {

        if (!(req->req_info->attributes = sk_X509_ATTRIBUTE_new_null()))

            goto err;

    }

    if (!sk_X509_ATTRIBUTE_push(req->req_info->attributes, attr))

        goto err;

    return 1;

 err:

    X509_ATTRIBUTE_free(attr);

    ASN1_TYPE_free(at);

    return 0;

}

/* This is the normal usage: use the "official" OID */

int X509_REQ_add_extensions(X509_REQ *req, STACK_OF(X509_EXTENSION) *exts)

{

    return X509_REQ_add_extensions_nid(req, exts, NID_ext_req);

}

/* Request attribute functions */

int X509_REQ_get_attr_count(const X509_REQ *req)

{

    return X509at_get_attr_count(req->req_info->attributes);

}

int X509_REQ_get_attr_by_NID(const X509_REQ *req, int nid, int lastpos)

{

    return X509at_get_attr_by_NID(req->req_info->attributes, nid, lastpos);

}

int X509_REQ_get_attr_by_OBJ(const X509_REQ *req, ASN1_OBJECT *obj,

                             int lastpos)

{

    return X509at_get_attr_by_OBJ(req->req_info->attributes, obj, lastpos);

}

X509_ATTRIBUTE *X509_REQ_get_attr(const X509_REQ *req, int loc)

{

    return X509at_get_attr(req->req_info->attributes, loc);

}

X509_ATTRIBUTE *X509_REQ_delete_attr(X509_REQ *req, int loc)

{

    return X509at_delete_attr(req->req_info->attributes, loc);

}

int X509_REQ_add1_attr(X509_REQ *req, X509_ATTRIBUTE *attr)

{

    if (X509at_add1_attr(&req->req_info->attributes, attr))

        return 1;

    return 0;

}

int X509_REQ_add1_attr_by_OBJ(X509_REQ *req,

                              const ASN1_OBJECT *obj, int type,

                              const unsigned char *bytes, int len)

{

    if (X509at_add1_attr_by_OBJ(&req->req_info->attributes, obj,

                                type, bytes, len))

        return 1;

    return 0;

}

int X509_REQ_add1_attr_by_NID(X509_REQ *req,

                              int nid, int type,

                              const unsigned char *bytes, int len)

{

    if (X509at_add1_attr_by_NID(&req->req_info->attributes, nid,

                                type, bytes, len))

        return 1;

    return 0;

}

int X509_REQ_add1_attr_by_txt(X509_REQ *req,

                              const char *attrname, int type,

                              const unsigned char *bytes, int len)

{

    if (X509at_add1_attr_by_txt(&req->req_info->attributes, attrname,

                                type, bytes, len))

        return 1;

    return 0;

}