/* 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_DSAstatic int dsa_pkey2pkcs8(PKCS8_PRIV_KEY_INFO *p8inf, EVP_PKEY *pkey);#endif#ifndef OPENSSL_NO_ECstatic 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