openssl/crypto/evp/evp_pkey.c

/* evp_pkey.c */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
 * 1999.
 */
/* ====================================================================
 * Copyright (c) 1999-2002 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include "cryptlib.h"
#include <openssl/x509.h>
#include <openssl/rand.h>
#ifndef OPENSSL_NO_RSA
# include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
# include <openssl/dsa.h>
#endif
#include <openssl/bn.h>

#ifndef OPENSSL_NO_DSA
static int dsa_pkey2pkcs8(PKCS8_PRIV_KEY_INFO *p8inf, EVP_PKEY *pkey);
#endif
#ifndef OPENSSL_NO_EC
static int eckey_pkey2pkcs8(PKCS8_PRIV_KEY_INFO *p8inf, EVP_PKEY *pkey);
#endif

/* Extract a private key from a PKCS8 structure */

EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8)
{
    EVP_PKEY *pkey = NULL;
#ifndef OPENSSL_NO_RSA
    RSA *rsa = NULL;
#endif
#ifndef OPENSSL_NO_DSA
    DSA *dsa = NULL;
    ASN1_TYPE *t1, *t2;
    ASN1_INTEGER *privkey;
    STACK_OF(ASN1_TYPE) *ndsa = NULL;
#endif
#ifndef OPENSSL_NO_EC
    EC_KEY *eckey = NULL;
    const unsigned char *p_tmp;
#endif
#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_EC)
    ASN1_TYPE *param = NULL;
    BN_CTX *ctx = NULL;
    int plen;
#endif
    X509_ALGOR *a;
    const unsigned char *p;
    const unsigned char *cp;
    int pkeylen;
    int nid;
    char obj_tmp[80];

    if (p8->pkey->type == V_ASN1_OCTET_STRING) {
        p8->broken = PKCS8_OK;
        p = p8->pkey->value.octet_string->data;
        pkeylen = p8->pkey->value.octet_string->length;
    } else {
        p8->broken = PKCS8_NO_OCTET;
        p = p8->pkey->value.sequence->data;
        pkeylen = p8->pkey->value.sequence->length;
    }
    if (!(pkey = EVP_PKEY_new())) {
        EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_MALLOC_FAILURE);
        return NULL;
    }
    a = p8->pkeyalg;
    nid = OBJ_obj2nid(a->algorithm);
    switch (nid) {
#ifndef OPENSSL_NO_RSA
    case NID_rsaEncryption:
        cp = p;
        if (!(rsa = d2i_RSAPrivateKey(NULL, &cp, pkeylen))) {
            EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
            return NULL;
        }
        EVP_PKEY_assign_RSA(pkey, rsa);
        break;
#endif
#ifndef OPENSSL_NO_DSA
    case NID_dsa:
        /*
         * PKCS#8 DSA is weird: you just get a private key integer and
         * parameters in the AlgorithmIdentifier the pubkey must be
         * recalculated.
         */

        /* Check for broken DSA PKCS#8, UGH! */
        if (*p == (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) {
            if (!(ndsa = ASN1_seq_unpack_ASN1_TYPE(p, pkeylen,
                                                   d2i_ASN1_TYPE,
                                                   ASN1_TYPE_free))) {
                EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
                goto dsaerr;
            }
            if (sk_ASN1_TYPE_num(ndsa) != 2) {
                EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
                goto dsaerr;
            }
            /*
             * Handle Two broken types: SEQUENCE {parameters, priv_key}
             * SEQUENCE {pub_key, priv_key}
             */

            t1 = sk_ASN1_TYPE_value(ndsa, 0);
            t2 = sk_ASN1_TYPE_value(ndsa, 1);
            if (t1->type == V_ASN1_SEQUENCE) {
                p8->broken = PKCS8_EMBEDDED_PARAM;
                param = t1;
            } else if (a->parameter->type == V_ASN1_SEQUENCE) {
                p8->broken = PKCS8_NS_DB;
                param = a->parameter;
            } else {
                EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
                goto dsaerr;
            }

            if (t2->type != V_ASN1_INTEGER) {
                EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
                goto dsaerr;
            }
            privkey = t2->value.integer;
        } else {
            if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pkeylen))) {
                EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
                goto dsaerr;
            }
            param = p8->pkeyalg->parameter;
        }
        if (!param || (param->type != V_ASN1_SEQUENCE)) {
            EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
            goto dsaerr;
        }
        cp = p = param->value.sequence->data;
        plen = param->value.sequence->length;
        if (!(dsa = d2i_DSAparams(NULL, &cp, plen))) {
            EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
            goto dsaerr;
        }
        /* We have parameters now set private key */
        if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) {
            EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_BN_DECODE_ERROR);
            goto dsaerr;
        }
        /* Calculate public key (ouch!) */
        if (!(dsa->pub_key = BN_new())) {
            EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_MALLOC_FAILURE);
            goto dsaerr;
        }
        if (!(ctx = BN_CTX_new())) {
            EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_MALLOC_FAILURE);
            goto dsaerr;
        }

        if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {

            EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_BN_PUBKEY_ERROR);
            goto dsaerr;
        }

        EVP_PKEY_assign_DSA(pkey, dsa);
        BN_CTX_free(ctx);
        if (ndsa)
            sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
        else
            ASN1_INTEGER_free(privkey);
        break;
 dsaerr:
        BN_CTX_free(ctx);
        sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
        DSA_free(dsa);
        EVP_PKEY_free(pkey);
        return NULL;
        break;
#endif
#ifndef OPENSSL_NO_EC
    case NID_X9_62_id_ecPublicKey:
        p_tmp = p;
        /* extract the ec parameters */
        param = p8->pkeyalg->parameter;

        if (!param || ((param->type != V_ASN1_SEQUENCE) &&
                       (param->type != V_ASN1_OBJECT))) {
            EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
            goto ecerr;
        }

        if (param->type == V_ASN1_SEQUENCE) {
            cp = p = param->value.sequence->data;
            plen = param->value.sequence->length;

            if (!(eckey = d2i_ECParameters(NULL, &cp, plen))) {
                EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
                goto ecerr;
            }
        } else {
            EC_GROUP *group;
            cp = p = param->value.object->data;
            plen = param->value.object->length;

            /*
             * type == V_ASN1_OBJECT => the parameters are given by an asn1
             * OID
             */
            if ((eckey = EC_KEY_new()) == NULL) {
                EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_MALLOC_FAILURE);
                goto ecerr;
            }
            group =
                EC_GROUP_new_by_curve_name(OBJ_obj2nid
                                           (a->parameter->value.object));
            if (group == NULL)
                goto ecerr;
            EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
            if (EC_KEY_set_group(eckey, group) == 0)
                goto ecerr;
            EC_GROUP_free(group);
        }

        /* We have parameters now set private key */
        if (!d2i_ECPrivateKey(&eckey, &p_tmp, pkeylen)) {
            EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
            goto ecerr;
        }

        /* calculate public key (if necessary) */
        if (EC_KEY_get0_public_key(eckey) == NULL) {
            const BIGNUM *priv_key;
            const EC_GROUP *group;
            EC_POINT *pub_key;
            /*
             * the public key was not included in the SEC1 private key =>
             * calculate the public key
             */
            group = EC_KEY_get0_group(eckey);
            pub_key = EC_POINT_new(group);
            if (pub_key == NULL) {
                EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_EC_LIB);
                goto ecerr;
            }
            if (!EC_POINT_copy(pub_key, EC_GROUP_get0_generator(group))) {
                EC_POINT_free(pub_key);
                EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_EC_LIB);
                goto ecerr;
            }
            priv_key = EC_KEY_get0_private_key(eckey);
            if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, ctx)) {
                EC_POINT_free(pub_key);
                EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_EC_LIB);
                goto ecerr;
            }
            if (EC_KEY_set_public_key(eckey, pub_key) == 0) {
                EC_POINT_free(pub_key);
                EVPerr(EVP_F_EVP_PKCS82PKEY, ERR_R_EC_LIB);
                goto ecerr;
            }
            EC_POINT_free(pub_key);
        }

        EVP_PKEY_assign_EC_KEY(pkey, eckey);
        if (ctx)
            BN_CTX_free(ctx);
        break;
 ecerr:
        if (ctx)
            BN_CTX_free(ctx);
        if (eckey)
            EC_KEY_free(eckey);
        if (pkey)
            EVP_PKEY_free(pkey);
        return NULL;
#endif
    default:
        EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
        if (!a->algorithm)
            BUF_strlcpy(obj_tmp, "NULL", sizeof obj_tmp);
        else
            i2t_ASN1_OBJECT(obj_tmp, 80, a->algorithm);
        ERR_add_error_data(2, "TYPE=", obj_tmp);
        EVP_PKEY_free(pkey);
        return NULL;
    }
    return pkey;
}

PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
{
    return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
}

/* Turn a private key into a PKCS8 structure */

PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
{
    PKCS8_PRIV_KEY_INFO *p8;

    if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {
        EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN, ERR_R_MALLOC_FAILURE);
        return NULL;
    }
    p8->broken = broken;
    if (!ASN1_INTEGER_set(p8->version, 0)) {
        EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN, ERR_R_MALLOC_FAILURE);
        PKCS8_PRIV_KEY_INFO_free(p8);
        return NULL;
    }
    if (!(p8->pkeyalg->parameter = ASN1_TYPE_new())) {
        EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN, ERR_R_MALLOC_FAILURE);
        PKCS8_PRIV_KEY_INFO_free(p8);
        return NULL;
    }
    p8->pkey->type = V_ASN1_OCTET_STRING;
    switch (EVP_PKEY_type(pkey->type)) {
#ifndef OPENSSL_NO_RSA
    case EVP_PKEY_RSA:

        if (p8->broken == PKCS8_NO_OCTET)
            p8->pkey->type = V_ASN1_SEQUENCE;

        p8->pkeyalg->algorithm = OBJ_nid2obj(NID_rsaEncryption);
        p8->pkeyalg->parameter->type = V_ASN1_NULL;
        if (!ASN1_pack_string_of(EVP_PKEY, pkey, i2d_PrivateKey,
                                 &p8->pkey->value.octet_string)) {
            EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN, ERR_R_MALLOC_FAILURE);
            PKCS8_PRIV_KEY_INFO_free(p8);
            return NULL;
        }
        break;
#endif
#ifndef OPENSSL_NO_DSA
    case EVP_PKEY_DSA:
        if (!dsa_pkey2pkcs8(p8, pkey)) {
            PKCS8_PRIV_KEY_INFO_free(p8);
            return NULL;
        }

        break;
#endif
#ifndef OPENSSL_NO_EC
    case EVP_PKEY_EC:
        if (!eckey_pkey2pkcs8(p8, pkey)) {
            PKCS8_PRIV_KEY_INFO_free(p8);
            return (NULL);
        }
        break;
#endif
    default:
        EVPerr(EVP_F_EVP_PKEY2PKCS8_BROKEN,
               EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
        PKCS8_PRIV_KEY_INFO_free(p8);
        return NULL;
    }
    RAND_add(p8->pkey->value.octet_string->data,
             p8->pkey->value.octet_string->length, 0.0);
    return p8;
}

PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
{
    switch (broken) {

    case PKCS8_OK:
        p8->broken = PKCS8_OK;
        return p8;
        break;

    case PKCS8_NO_OCTET:
        p8->broken = PKCS8_NO_OCTET;
        p8->pkey->type = V_ASN1_SEQUENCE;
        return p8;
        break;

    default:
        EVPerr(EVP_F_PKCS8_SET_BROKEN, EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
        return NULL;
    }
}

#ifndef OPENSSL_NO_DSA
static int dsa_pkey2pkcs8(PKCS8_PRIV_KEY_INFO *p8, EVP_PKEY *pkey)
{
    ASN1_STRING *params = NULL;
    ASN1_INTEGER *prkey = NULL;
    ASN1_TYPE *ttmp = NULL;
    STACK_OF(ASN1_TYPE) *ndsa = NULL;
    unsigned char *p = NULL, *q;
    int len;

    p8->pkeyalg->algorithm = OBJ_nid2obj(NID_dsa);
    len = i2d_DSAparams(pkey->pkey.dsa, NULL);
    if (!(p = OPENSSL_malloc(len))) {
        EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    q = p;
    i2d_DSAparams(pkey->pkey.dsa, &q);
    if (!(params = ASN1_STRING_new())) {
        EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    if (!ASN1_STRING_set(params, p, len)) {
        EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    OPENSSL_free(p);
    p = NULL;
    /* Get private key into integer */
    if (!(prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL))) {
        EVPerr(EVP_F_DSA_PKEY2PKCS8, EVP_R_ENCODE_ERROR);
        goto err;
    }

    switch (p8->broken) {

    case PKCS8_OK:
    case PKCS8_NO_OCTET:

        if (!ASN1_pack_string_of(ASN1_INTEGER, prkey, i2d_ASN1_INTEGER,
                                 &p8->pkey->value.octet_string)) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }

        M_ASN1_INTEGER_free(prkey);
        prkey = NULL;
        p8->pkeyalg->parameter->value.sequence = params;
        params = NULL;
        p8->pkeyalg->parameter->type = V_ASN1_SEQUENCE;

        break;

    case PKCS8_NS_DB:

        p8->pkeyalg->parameter->value.sequence = params;
        params = NULL;
        p8->pkeyalg->parameter->type = V_ASN1_SEQUENCE;
        if (!(ndsa = sk_ASN1_TYPE_new_null())) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        if (!(ttmp = ASN1_TYPE_new())) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        if (!(ttmp->value.integer =
              BN_to_ASN1_INTEGER(pkey->pkey.dsa->pub_key, NULL))) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, EVP_R_ENCODE_ERROR);
            goto err;
        }
        ttmp->type = V_ASN1_INTEGER;
        if (!sk_ASN1_TYPE_push(ndsa, ttmp)) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }

        if (!(ttmp = ASN1_TYPE_new())) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        ttmp->value.integer = prkey;
        prkey = NULL;
        ttmp->type = V_ASN1_INTEGER;
        if (!sk_ASN1_TYPE_push(ndsa, ttmp)) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        ttmp = NULL;

        if (!(p8->pkey->value.octet_string = ASN1_OCTET_STRING_new())) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }

        if (!ASN1_seq_pack_ASN1_TYPE(ndsa, i2d_ASN1_TYPE,
                                     &p8->pkey->value.octet_string->data,
                                     &p8->pkey->value.octet_string->length)) {

            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
        break;

    case PKCS8_EMBEDDED_PARAM:

        p8->pkeyalg->parameter->type = V_ASN1_NULL;
        if (!(ndsa = sk_ASN1_TYPE_new_null())) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        if (!(ttmp = ASN1_TYPE_new())) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        ttmp->value.sequence = params;
        params = NULL;
        ttmp->type = V_ASN1_SEQUENCE;
        if (!sk_ASN1_TYPE_push(ndsa, ttmp)) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }

        if (!(ttmp = ASN1_TYPE_new())) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        ttmp->value.integer = prkey;
        prkey = NULL;
        ttmp->type = V_ASN1_INTEGER;
        if (!sk_ASN1_TYPE_push(ndsa, ttmp)) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        ttmp = NULL;

        if (!(p8->pkey->value.octet_string = ASN1_OCTET_STRING_new())) {
            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }

        if (!ASN1_seq_pack_ASN1_TYPE(ndsa, i2d_ASN1_TYPE,
                                     &p8->pkey->value.octet_string->data,
                                     &p8->pkey->value.octet_string->length)) {

            EVPerr(EVP_F_DSA_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            goto err;
        }
        sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
        break;
    }
    return 1;
 err:
    if (p != NULL)
        OPENSSL_free(p);
    if (params != NULL)
        ASN1_STRING_free(params);
    if (prkey != NULL)
        M_ASN1_INTEGER_free(prkey);
    if (ttmp != NULL)
        ASN1_TYPE_free(ttmp);
    if (ndsa != NULL)
        sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
    return 0;
}
#endif

#ifndef OPENSSL_NO_EC
static int eckey_pkey2pkcs8(PKCS8_PRIV_KEY_INFO *p8, EVP_PKEY *pkey)
{
    EC_KEY *ec_key;
    const EC_GROUP *group;
    unsigned char *p, *pp;
    int nid, i, ret = 0;
    unsigned int tmp_flags, old_flags;

    ec_key = pkey->pkey.ec;
    if (ec_key == NULL || (group = EC_KEY_get0_group(ec_key)) == NULL) {
        EVPerr(EVP_F_ECKEY_PKEY2PKCS8, EVP_R_MISSING_PARAMETERS);
        return 0;
    }

    /* set the ec parameters OID */
    if (p8->pkeyalg->algorithm)
        ASN1_OBJECT_free(p8->pkeyalg->algorithm);

    p8->pkeyalg->algorithm = OBJ_nid2obj(NID_X9_62_id_ecPublicKey);

    /* set the ec parameters */

    if (p8->pkeyalg->parameter) {
        ASN1_TYPE_free(p8->pkeyalg->parameter);
        p8->pkeyalg->parameter = NULL;
    }

    if ((p8->pkeyalg->parameter = ASN1_TYPE_new()) == NULL) {
        EVPerr(EVP_F_ECKEY_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
        return 0;
    }

    if (EC_GROUP_get_asn1_flag(group)
        && (nid = EC_GROUP_get_curve_name(group))) {
        /* we have a 'named curve' => just set the OID */
        p8->pkeyalg->parameter->type = V_ASN1_OBJECT;
        p8->pkeyalg->parameter->value.object = OBJ_nid2obj(nid);
    } else {                    /* explicit parameters */

        if ((i = i2d_ECParameters(ec_key, NULL)) == 0) {
            EVPerr(EVP_F_ECKEY_PKEY2PKCS8, ERR_R_EC_LIB);
            return 0;
        }
        if ((p = (unsigned char *)OPENSSL_malloc(i)) == NULL) {
            EVPerr(EVP_F_ECKEY_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
            return 0;
        }
        pp = p;
        if (!i2d_ECParameters(ec_key, &pp)) {
            EVPerr(EVP_F_ECKEY_PKEY2PKCS8, ERR_R_EC_LIB);
            OPENSSL_free(p);
            return 0;
        }
        p8->pkeyalg->parameter->type = V_ASN1_SEQUENCE;
        if ((p8->pkeyalg->parameter->value.sequence
             = ASN1_STRING_new()) == NULL) {
            EVPerr(EVP_F_ECKEY_PKEY2PKCS8, ERR_R_ASN1_LIB);
            OPENSSL_free(p);
            return 0;
        }
        ASN1_STRING_set(p8->pkeyalg->parameter->value.sequence, p, i);
        OPENSSL_free(p);
    }

    /* set the private key */

    /*
     * do not include the parameters in the SEC1 private key see PKCS#11
     * 12.11
     */
    old_flags = EC_KEY_get_enc_flags(pkey->pkey.ec);
    tmp_flags = old_flags | EC_PKEY_NO_PARAMETERS;
    EC_KEY_set_enc_flags(pkey->pkey.ec, tmp_flags);
    i = i2d_ECPrivateKey(pkey->pkey.ec, NULL);
    if (!i) {
        EC_KEY_set_enc_flags(pkey->pkey.ec, old_flags);
        EVPerr(EVP_F_ECKEY_PKEY2PKCS8, ERR_R_EC_LIB);
        return 0;
    }
    p = (unsigned char *)OPENSSL_malloc(i);
    if (!p) {
        EC_KEY_set_enc_flags(pkey->pkey.ec, old_flags);
        EVPerr(EVP_F_ECKEY_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
        return 0;
    }
    pp = p;
    if (!i2d_ECPrivateKey(pkey->pkey.ec, &pp)) {
        EC_KEY_set_enc_flags(pkey->pkey.ec, old_flags);
        EVPerr(EVP_F_ECKEY_PKEY2PKCS8, ERR_R_EC_LIB);
        OPENSSL_free(p);
        return 0;
    }
    /* restore old encoding flags */
    EC_KEY_set_enc_flags(pkey->pkey.ec, old_flags);

    switch (p8->broken) {

    case PKCS8_OK:
        p8->pkey->value.octet_string = ASN1_OCTET_STRING_new();
        if (!p8->pkey->value.octet_string ||
            !M_ASN1_OCTET_STRING_set(p8->pkey->value.octet_string,
                                     (const void *)p, i)) {
            EVPerr(EVP_F_ECKEY_PKEY2PKCS8, ERR_R_MALLOC_FAILURE);
        } else
            ret = 1;
        break;
    case PKCS8_NO_OCTET:       /* RSA specific */
    case PKCS8_NS_DB:          /* DSA specific */
    case PKCS8_EMBEDDED_PARAM: /* DSA specific */
    default:
        EVPerr(EVP_F_ECKEY_PKEY2PKCS8, EVP_R_ENCODE_ERROR);
    }
    OPENSSL_cleanse(p, (size_t)i);
    OPENSSL_free(p);
    return ret;
}
#endif

/* EVP_PKEY attribute functions */

int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
{
    return X509at_get_attr_count(key->attributes);
}

int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos)
{
    return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
}

int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, ASN1_OBJECT *obj,
                             int lastpos)
{
    return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
}

X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
{
    return X509at_get_attr(key->attributes, loc);
}

X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
{
    return X509at_delete_attr(key->attributes, loc);
}

int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
{
    if (X509at_add1_attr(&key->attributes, attr))
        return 1;
    return 0;
}

int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
                              const ASN1_OBJECT *obj, int type,
                              const unsigned char *bytes, int len)
{
    if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len))
        return 1;
    return 0;
}

int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
                              int nid, int type,
                              const unsigned char *bytes, int len)
{
    if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len))
        return 1;
    return 0;
}

int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
                              const char *attrname, int type,
                              const unsigned char *bytes, int len)
{
    if (X509at_add1_attr_by_txt(&key->attributes, attrname, type, bytes, len))
        return 1;
    return 0;
}