x509_req.c

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/* crypto/x509/x509_req.c */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * 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 ([email protected]).
 * 
 * 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 ([email protected])"
 *    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 ([email protected])"
 * 
 * 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);
    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;
}