xref: /dragonfly/crypto/libressl/crypto/asn1/x_pubkey.c (revision 961e30ea7dc61d1112b778ea4981eac68129fb86)

/* $OpenBSD: x_pubkey.c,v 1.32 2022/05/24 19:59:14 tb Exp $ */
/* 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/opensslconf.h>

#include <openssl/asn1t.h>
#include <openssl/err.h>
#include <openssl/x509.h>

#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif

#include "asn1_locl.h"
#include "evp_locl.h"
#include "x509_lcl.h"

/* Minor tweak to operation: free up EVP_PKEY */
static int
pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
{
          if (operation == ASN1_OP_FREE_POST) {
                    X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
                    EVP_PKEY_free(pubkey->pkey);
          }
          return 1;
}

static const ASN1_AUX X509_PUBKEY_aux = {
          .asn1_cb = pubkey_cb,
};
static const ASN1_TEMPLATE X509_PUBKEY_seq_tt[] = {
          {
                    .offset = offsetof(X509_PUBKEY, algor),
                    .field_name = "algor",
                    .item = &X509_ALGOR_it,
          },
          {
                    .offset = offsetof(X509_PUBKEY, public_key),
                    .field_name = "public_key",
                    .item = &ASN1_BIT_STRING_it,
          },
};

const ASN1_ITEM X509_PUBKEY_it = {
          .itype = ASN1_ITYPE_SEQUENCE,
          .utype = V_ASN1_SEQUENCE,
          .templates = X509_PUBKEY_seq_tt,
          .tcount = sizeof(X509_PUBKEY_seq_tt) / sizeof(ASN1_TEMPLATE),
          .funcs = &X509_PUBKEY_aux,
          .size = sizeof(X509_PUBKEY),
          .sname = "X509_PUBKEY",
};

X509_PUBKEY *
d2i_X509_PUBKEY(X509_PUBKEY **a, const unsigned char **in, long len)
{
          return (X509_PUBKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
              &X509_PUBKEY_it);
}

int
i2d_X509_PUBKEY(X509_PUBKEY *a, unsigned char **out)
{
          return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_PUBKEY_it);
}

X509_PUBKEY *
X509_PUBKEY_new(void)
{
          return (X509_PUBKEY *)ASN1_item_new(&X509_PUBKEY_it);
}

void
X509_PUBKEY_free(X509_PUBKEY *a)
{
          ASN1_item_free((ASN1_VALUE *)a, &X509_PUBKEY_it);
}

int
X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
{
          X509_PUBKEY *pk = NULL;

          if (x == NULL)
                    return (0);
          if ((pk = X509_PUBKEY_new()) == NULL)
                    goto error;

          if (pkey->ameth) {
                    if (pkey->ameth->pub_encode) {
                              if (!pkey->ameth->pub_encode(pk, pkey)) {
                                        X509error(X509_R_PUBLIC_KEY_ENCODE_ERROR);
                                        goto error;
                              }
                    } else {
                              X509error(X509_R_METHOD_NOT_SUPPORTED);
                              goto error;
                    }
          } else {
                    X509error(X509_R_UNSUPPORTED_ALGORITHM);
                    goto error;
          }

          if (*x != NULL)
                    X509_PUBKEY_free(*x);

          *x = pk;

          return 1;

 error:
          if (pk != NULL)
                    X509_PUBKEY_free(pk);
          return 0;
}

EVP_PKEY *
X509_PUBKEY_get0(X509_PUBKEY *key)
{
          EVP_PKEY *ret = NULL;

          if (key == NULL)
                    goto error;

          if (key->pkey != NULL)
                    return key->pkey;

          if (key->public_key == NULL)
                    goto error;

          if ((ret = EVP_PKEY_new()) == NULL) {
                    X509error(ERR_R_MALLOC_FAILURE);
                    goto error;
          }

          if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) {
                    X509error(X509_R_UNSUPPORTED_ALGORITHM);
                    goto error;
          }

          if (ret->ameth->pub_decode) {
                    if (!ret->ameth->pub_decode(ret, key)) {
                              X509error(X509_R_PUBLIC_KEY_DECODE_ERROR);
                              goto error;
                    }
          } else {
                    X509error(X509_R_METHOD_NOT_SUPPORTED);
                    goto error;
          }

          /* Check to see if another thread set key->pkey first */
          CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
          if (key->pkey) {
                    CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
                    EVP_PKEY_free(ret);
                    ret = key->pkey;
          } else {
                    key->pkey = ret;
                    CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
          }

          return ret;

 error:
          EVP_PKEY_free(ret);
          return (NULL);
}

EVP_PKEY *
X509_PUBKEY_get(X509_PUBKEY *key)
{
          EVP_PKEY *pkey;

          if ((pkey = X509_PUBKEY_get0(key)) == NULL)
                    return (NULL);

          CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);

          return pkey;
}

/*
 * Decode an X509_PUBKEY into the specified key type.
 */
static int
pubkey_ex_d2i(int pkey_type, ASN1_VALUE **pval, const unsigned char **in,
    long len, const ASN1_ITEM *it)
{
          const ASN1_EXTERN_FUNCS *ef = it->funcs;
          const unsigned char *p = *in;
          X509_PUBKEY *xpk = NULL;
          ASN1_VALUE *key = NULL;
          EVP_PKEY *pkey = NULL;
          int ret = 0;

          if ((xpk = d2i_X509_PUBKEY(NULL, &p, len)) == NULL)
                    goto err;
          if ((pkey = X509_PUBKEY_get(xpk)) == NULL)
                    goto err;

          switch (pkey_type) {
          case EVP_PKEY_NONE:
                    key = (ASN1_VALUE *)pkey;
                    pkey = NULL;
                    break;

          case EVP_PKEY_DSA:
                    key = (ASN1_VALUE *)EVP_PKEY_get1_DSA(pkey);
                    break;

          case EVP_PKEY_RSA:
                    key = (ASN1_VALUE *)EVP_PKEY_get1_RSA(pkey);
                    break;

          case EVP_PKEY_EC:
                    key = (ASN1_VALUE *)EVP_PKEY_get1_EC_KEY(pkey);
                    break;

          default:
                    goto err;
          }

          if (key == NULL)
                    goto err;

          ef->asn1_ex_free(pval, it);

          *pval = key;
          *in = p;
          ret = 1;

 err:
          EVP_PKEY_free(pkey);
          X509_PUBKEY_free(xpk);

          return ret;
}

/*
 * Encode the specified key type into an X509_PUBKEY.
 */
static int
pubkey_ex_i2d(int pkey_type, ASN1_VALUE **pval, unsigned char **out,
    const ASN1_ITEM *it)
{
          X509_PUBKEY *xpk = NULL;
          EVP_PKEY *pkey, *pktmp;
          int ret = -1;

          if ((pkey = pktmp = EVP_PKEY_new()) == NULL)
                    goto err;

          switch (pkey_type) {
          case EVP_PKEY_NONE:
                    pkey = (EVP_PKEY *)*pval;
                    break;

          case EVP_PKEY_DSA:
                    if (!EVP_PKEY_set1_DSA(pkey, (DSA *)*pval))
                              goto err;
                    break;

          case EVP_PKEY_RSA:
                    if (!EVP_PKEY_set1_RSA(pkey, (RSA *)*pval))
                              goto err;
                    break;

          case EVP_PKEY_EC:
                    if (!EVP_PKEY_set1_EC_KEY(pkey, (EC_KEY*)*pval))
                              goto err;
                    break;

          default:
                    goto err;
          }

          if (!X509_PUBKEY_set(&xpk, pkey))
                    goto err;

          ret = i2d_X509_PUBKEY(xpk, out);

 err:
          EVP_PKEY_free(pktmp);
          X509_PUBKEY_free(xpk);

          return ret;
}

static int
pkey_pubkey_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
          if ((*pval = (ASN1_VALUE *)EVP_PKEY_new()) == NULL)
                    return 0;

          return 1;
}

static void
pkey_pubkey_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
          EVP_PKEY_free((EVP_PKEY *)*pval);
          *pval = NULL;
}

static int
pkey_pubkey_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
    const ASN1_ITEM *it, int tag, int aclass, char opt, ASN1_TLC *ctx)
{
          return pubkey_ex_d2i(EVP_PKEY_NONE, pval, in, len, it);
}

static int
pkey_pubkey_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it,
    int tag, int aclass)
{
          return pubkey_ex_i2d(EVP_PKEY_NONE, pval, out, it);
}

const ASN1_EXTERN_FUNCS pkey_pubkey_asn1_ff = {
          .app_data = NULL,
          .asn1_ex_new = pkey_pubkey_ex_new,
          .asn1_ex_free = pkey_pubkey_ex_free,
          .asn1_ex_clear = NULL,
          .asn1_ex_d2i = pkey_pubkey_ex_d2i,
          .asn1_ex_i2d = pkey_pubkey_ex_i2d,
          .asn1_ex_print = NULL,
};

const ASN1_ITEM EVP_PKEY_PUBKEY_it = {
          .itype = ASN1_ITYPE_EXTERN,
          .utype = 0,
          .templates = NULL,
          .tcount = 0,
          .funcs = &pkey_pubkey_asn1_ff,
          .size = 0,
          .sname = NULL,
};

EVP_PKEY *
d2i_PUBKEY(EVP_PKEY **pkey, const unsigned char **in, long len)
{
          return (EVP_PKEY *)ASN1_item_d2i((ASN1_VALUE **)pkey, in, len,
              &EVP_PKEY_PUBKEY_it);
}

int
i2d_PUBKEY(EVP_PKEY *pkey, unsigned char **out)
{
          return ASN1_item_i2d((ASN1_VALUE *)pkey, out, &EVP_PKEY_PUBKEY_it);
}

EVP_PKEY *
d2i_PUBKEY_bio(BIO *bp, EVP_PKEY **pkey)
{
          return (EVP_PKEY *)ASN1_item_d2i_bio(&EVP_PKEY_PUBKEY_it, bp,
              (ASN1_VALUE **)pkey);
}

int
i2d_PUBKEY_bio(BIO *bp, EVP_PKEY *pkey)
{
          return ASN1_item_i2d_bio(&EVP_PKEY_PUBKEY_it, bp, (ASN1_VALUE *)pkey);
}

EVP_PKEY *
d2i_PUBKEY_fp(FILE *fp, EVP_PKEY **pkey)
{
          return (EVP_PKEY *)ASN1_item_d2i_fp(&EVP_PKEY_PUBKEY_it, fp,
              (ASN1_VALUE **)pkey);
}

int
i2d_PUBKEY_fp(FILE *fp, EVP_PKEY *pkey)
{
          return ASN1_item_i2d_fp(&EVP_PKEY_PUBKEY_it, fp, (ASN1_VALUE *)pkey);
}

/*
 * The following are equivalents but which return RSA and DSA keys.
 */
#ifndef OPENSSL_NO_RSA

static int
rsa_pubkey_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
          if ((*pval = (ASN1_VALUE *)RSA_new()) == NULL)
                    return 0;

          return 1;
}

static void
rsa_pubkey_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
          RSA_free((RSA *)*pval);
          *pval = NULL;
}

static int
rsa_pubkey_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
    const ASN1_ITEM *it, int tag, int aclass, char opt, ASN1_TLC *ctx)
{
          return pubkey_ex_d2i(EVP_PKEY_RSA, pval, in, len, it);
}

static int
rsa_pubkey_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it,
    int tag, int aclass)
{
          return pubkey_ex_i2d(EVP_PKEY_RSA, pval, out, it);
}

const ASN1_EXTERN_FUNCS rsa_pubkey_asn1_ff = {
          .app_data = NULL,
          .asn1_ex_new = rsa_pubkey_ex_new,
          .asn1_ex_free = rsa_pubkey_ex_free,
          .asn1_ex_clear = NULL,
          .asn1_ex_d2i = rsa_pubkey_ex_d2i,
          .asn1_ex_i2d = rsa_pubkey_ex_i2d,
          .asn1_ex_print = NULL,
};

const ASN1_ITEM RSA_PUBKEY_it = {
          .itype = ASN1_ITYPE_EXTERN,
          .utype = 0,
          .templates = NULL,
          .tcount = 0,
          .funcs = &rsa_pubkey_asn1_ff,
          .size = 0,
          .sname = NULL,
};

RSA *
d2i_RSA_PUBKEY(RSA **rsa, const unsigned char **in, long len)
{
          return (RSA *)ASN1_item_d2i((ASN1_VALUE **)rsa, in, len,
              &RSA_PUBKEY_it);
}

int
i2d_RSA_PUBKEY(RSA *rsa, unsigned char **out)
{
          return ASN1_item_i2d((ASN1_VALUE *)rsa, out, &RSA_PUBKEY_it);
}

RSA *
d2i_RSA_PUBKEY_bio(BIO *bp, RSA **rsa)
{
          return (RSA *)ASN1_item_d2i_bio(&RSA_PUBKEY_it, bp, (ASN1_VALUE **)rsa);
}

int
i2d_RSA_PUBKEY_bio(BIO *bp, RSA *rsa)
{
          return ASN1_item_i2d_bio(&RSA_PUBKEY_it, bp, (ASN1_VALUE *)rsa);
}

RSA *
d2i_RSA_PUBKEY_fp(FILE *fp, RSA **rsa)
{
          return (RSA *)ASN1_item_d2i_fp(&RSA_PUBKEY_it, fp, (ASN1_VALUE **)rsa);
}

int
i2d_RSA_PUBKEY_fp(FILE *fp, RSA *rsa)
{
          return ASN1_item_i2d_fp(&RSA_PUBKEY_it, fp, (ASN1_VALUE *)rsa);
}
#endif

#ifndef OPENSSL_NO_DSA

static int
dsa_pubkey_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
          if ((*pval = (ASN1_VALUE *)DSA_new()) == NULL)
                    return 0;

          return 1;
}

static void
dsa_pubkey_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
          DSA_free((DSA *)*pval);
          *pval = NULL;
}

static int
dsa_pubkey_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
    const ASN1_ITEM *it, int tag, int aclass, char opt, ASN1_TLC *ctx)
{
          return pubkey_ex_d2i(EVP_PKEY_DSA, pval, in, len, it);
}

static int
dsa_pubkey_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it,
    int tag, int aclass)
{
          return pubkey_ex_i2d(EVP_PKEY_DSA, pval, out, it);
}

const ASN1_EXTERN_FUNCS dsa_pubkey_asn1_ff = {
          .app_data = NULL,
          .asn1_ex_new = dsa_pubkey_ex_new,
          .asn1_ex_free = dsa_pubkey_ex_free,
          .asn1_ex_clear = NULL,
          .asn1_ex_d2i = dsa_pubkey_ex_d2i,
          .asn1_ex_i2d = dsa_pubkey_ex_i2d,
          .asn1_ex_print = NULL,
};

const ASN1_ITEM DSA_PUBKEY_it = {
          .itype = ASN1_ITYPE_EXTERN,
          .utype = 0,
          .templates = NULL,
          .tcount = 0,
          .funcs = &dsa_pubkey_asn1_ff,
          .size = 0,
          .sname = NULL,
};

DSA *
d2i_DSA_PUBKEY(DSA **dsa, const unsigned char **in, long len)
{
          return (DSA *)ASN1_item_d2i((ASN1_VALUE **)dsa, in, len,
              &DSA_PUBKEY_it);
}

int
i2d_DSA_PUBKEY(DSA *dsa, unsigned char **out)
{
          return ASN1_item_i2d((ASN1_VALUE *)dsa, out, &DSA_PUBKEY_it);
}

DSA *
d2i_DSA_PUBKEY_bio(BIO *bp, DSA **dsa)
{
          return (DSA *)ASN1_item_d2i_bio(&DSA_PUBKEY_it, bp, (ASN1_VALUE **)dsa);
}

int
i2d_DSA_PUBKEY_bio(BIO *bp, DSA *dsa)
{
          return ASN1_item_i2d_bio(&DSA_PUBKEY_it, bp, (ASN1_VALUE *)dsa);
}

DSA *
d2i_DSA_PUBKEY_fp(FILE *fp, DSA **dsa)
{
          return (DSA *)ASN1_item_d2i_fp(&DSA_PUBKEY_it, fp, (ASN1_VALUE **)dsa);
}

int
i2d_DSA_PUBKEY_fp(FILE *fp, DSA *dsa)
{
          return ASN1_item_i2d_fp(&DSA_PUBKEY_it, fp, (ASN1_VALUE *)dsa);
}

#endif

#ifndef OPENSSL_NO_EC

static int
ec_pubkey_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
          if ((*pval = (ASN1_VALUE *)EC_KEY_new()) == NULL)
                    return 0;

          return 1;
}

static void
ec_pubkey_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
          EC_KEY_free((EC_KEY *)*pval);
          *pval = NULL;
}

static int
ec_pubkey_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
    const ASN1_ITEM *it, int tag, int aclass, char opt, ASN1_TLC *ctx)
{
          return pubkey_ex_d2i(EVP_PKEY_EC, pval, in, len, it);
}

static int
ec_pubkey_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it,
    int tag, int aclass)
{
          return pubkey_ex_i2d(EVP_PKEY_EC, pval, out, it);
}

const ASN1_EXTERN_FUNCS ec_pubkey_asn1_ff = {
          .app_data = NULL,
          .asn1_ex_new = ec_pubkey_ex_new,
          .asn1_ex_free = ec_pubkey_ex_free,
          .asn1_ex_clear = NULL,
          .asn1_ex_d2i = ec_pubkey_ex_d2i,
          .asn1_ex_i2d = ec_pubkey_ex_i2d,
          .asn1_ex_print = NULL,
};

const ASN1_ITEM EC_PUBKEY_it = {
          .itype = ASN1_ITYPE_EXTERN,
          .utype = 0,
          .templates = NULL,
          .tcount = 0,
          .funcs = &ec_pubkey_asn1_ff,
          .size = 0,
          .sname = NULL,
};

EC_KEY *
d2i_EC_PUBKEY(EC_KEY **ec, const unsigned char **in, long len)
{
          return (EC_KEY *)ASN1_item_d2i((ASN1_VALUE **)ec, in, len,
              &EC_PUBKEY_it);
}

int
i2d_EC_PUBKEY(EC_KEY *ec, unsigned char **out)
{
          return ASN1_item_i2d((ASN1_VALUE *)ec, out, &EC_PUBKEY_it);
}

EC_KEY *
d2i_EC_PUBKEY_bio(BIO *bp, EC_KEY **ec)
{
          return (EC_KEY *)ASN1_item_d2i_bio(&EC_PUBKEY_it, bp, (ASN1_VALUE **)ec);
}

int
i2d_EC_PUBKEY_bio(BIO *bp, EC_KEY *ec)
{
          return ASN1_item_i2d_bio(&EC_PUBKEY_it, bp, (ASN1_VALUE *)ec);
}

EC_KEY *
d2i_EC_PUBKEY_fp(FILE *fp, EC_KEY **ec)
{
          return (EC_KEY *)ASN1_item_d2i_fp(&EC_PUBKEY_it, fp, (ASN1_VALUE **)ec);
}

int
i2d_EC_PUBKEY_fp(FILE *fp, EC_KEY *ec)
{
          return ASN1_item_i2d_fp(&EC_PUBKEY_it, fp, (ASN1_VALUE *)ec);
}
#endif

int
X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, int ptype,
    void *pval, unsigned char *penc, int penclen)
{
          if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval))
                    return 0;

          if (penc == NULL)
                    return 1;

          ASN1_STRING_set0(pub->public_key, penc, penclen);

          return asn1_abs_set_unused_bits(pub->public_key, 0);
}

int
X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, const unsigned char **pk,
    int *ppklen, X509_ALGOR **pa, X509_PUBKEY *pub)
{
          if (ppkalg)
                    *ppkalg = pub->algor->algorithm;
          if (pk) {
                    *pk = pub->public_key->data;
                    *ppklen = pub->public_key->length;
          }
          if (pa)
                    *pa = pub->algor;
          return 1;
}