/*
 * Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.
 */

/* crypto/engine/e_pk11.h */
/*
 * This product includes software developed by the OpenSSL Project for
 * use in the OpenSSL Toolkit (http://www.openssl.org/).
 *
 * This project also referenced hw_pkcs11-0.9.7b.patch written by
 * Afchine Madjlessi.
 */
/*
 * ====================================================================
 * Copyright (c) 2000-2001 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).
 *
 */

#ifndef	E_PK11_H
#define	E_PK11_H

#include "e_pk11_err.h"

#ifdef	__cplusplus
extern "C" {
#endif

/* max byte length of a symmetric key we support */
#define	PK11_KEY_LEN_MAX			32

/*
 * This structure encapsulates all reusable information for a PKCS#11
 * session. A list of these objects is created on behalf of the
 * calling application using an on-demand method. Each operation
 * type (see PK11_OPTYPE below) has its own per-process list.
 * Each of the lists is basically a cache for faster PKCS#11 object
 * access to avoid expensive C_Find{,Init,Final}Object() calls.
 *
 * When a new request comes in, an object will be taken from the list
 * (if there is one) or a new one is created to handle the request
 * (if the list is empty). See pk11_get_session() on how it is done.
 */
typedef struct PK11_st_SESSION {
	struct PK11_st_SESSION	*next;
	CK_SESSION_HANDLE	session;	/* PK11 session handle */
	pid_t			pid;		/* Current process ID */
	CK_BBOOL		persistent;	/* is that a keystore object? */
	union {
#ifndef OPENSSL_NO_RSA
		struct {
			CK_OBJECT_HANDLE	rsa_pub_key; /* pub handle */
			CK_OBJECT_HANDLE	rsa_priv_key; /* priv handle */
			RSA			*rsa_pub; /* pub key addr */
			BIGNUM			*rsa_n_num; /* pub modulus */
			BIGNUM			*rsa_e_num; /* pub exponent */
			RSA			*rsa_priv; /* priv key addr */
			BIGNUM			*rsa_d_num; /* priv exponent */
		} u_RSA;
#endif /* OPENSSL_NO_RSA */
#ifndef OPENSSL_NO_DSA
		struct {
			CK_OBJECT_HANDLE	dsa_pub_key; /* pub handle */
			CK_OBJECT_HANDLE	dsa_priv_key; /* priv handle */
			DSA			*dsa_pub; /* pub key addr */
			BIGNUM			*dsa_pub_num; /* pub key */
			DSA			*dsa_priv; /* priv key addr */
			BIGNUM			*dsa_priv_num; /* priv key */
		} u_DSA;
#endif /* OPENSSL_NO_DSA */
#ifndef OPENSSL_NO_DH
		struct {
			CK_OBJECT_HANDLE	dh_key; /* key handle */
			DH			*dh; /* dh key addr */
			BIGNUM			*dh_priv_num; /* priv dh key */
		} u_DH;
#endif /* OPENSSL_NO_DH */
		struct {
			CK_OBJECT_HANDLE	cipher_key; /* key handle */
			unsigned char		key[PK11_KEY_LEN_MAX];
			int			key_len; /* priv key len */
			int			encrypt; /* 1/0 enc/decr */
		} u_cipher;
	} opdata_u;
} PK11_SESSION;

#define	opdata_rsa_pub_key	opdata_u.u_RSA.rsa_pub_key
#define	opdata_rsa_priv_key	opdata_u.u_RSA.rsa_priv_key
#define	opdata_rsa_pub		opdata_u.u_RSA.rsa_pub
#define	opdata_rsa_priv		opdata_u.u_RSA.rsa_priv
#define	opdata_rsa_n_num	opdata_u.u_RSA.rsa_n_num
#define	opdata_rsa_e_num	opdata_u.u_RSA.rsa_e_num
#define	opdata_rsa_d_num	opdata_u.u_RSA.rsa_d_num
#define	opdata_dsa_pub_key	opdata_u.u_DSA.dsa_pub_key
#define	opdata_dsa_priv_key	opdata_u.u_DSA.dsa_priv_key
#define	opdata_dsa_pub		opdata_u.u_DSA.dsa_pub
#define	opdata_dsa_pub_num	opdata_u.u_DSA.dsa_pub_num
#define	opdata_dsa_priv		opdata_u.u_DSA.dsa_priv
#define	opdata_dsa_priv_num	opdata_u.u_DSA.dsa_priv_num
#define	opdata_dh_key		opdata_u.u_DH.dh_key
#define	opdata_dh		opdata_u.u_DH.dh
#define	opdata_dh_priv_num	opdata_u.u_DH.dh_priv_num
#define	opdata_cipher_key	opdata_u.u_cipher.cipher_key
#define	opdata_key		opdata_u.u_cipher.key
#define	opdata_key_len		opdata_u.u_cipher.key_len
#define	opdata_encrypt		opdata_u.u_cipher.encrypt

/*
 * We have 3 different groups of operation types:
 *   1) asymmetric operations
 *   2) random operations
 *   3) symmetric and digest operations
 *
 * This division into groups stems from the fact that it's common that hardware
 * providers may support operations from one group only. For example, hardware
 * providers on UltraSPARC T2, n2rng(7d), ncp(7d), and n2cp(7d), each support
 * only a single group of operations.
 *
 * For every group a different slot can be chosen. That means that we must have
 * at least 3 different lists of cached PKCS#11 sessions since sessions from
 * different groups may be initialized in different slots.
 *
 * To provide locking granularity in multithreaded environment, the groups are
 * further split into types with each type having a separate session cache.
 */
typedef enum PK11_OPTYPE_ENUM {
	OP_RAND,
	OP_RSA,
	OP_DSA,
	OP_DH,
	OP_CIPHER,
	OP_DIGEST,
	OP_MAX
} PK11_OPTYPE;

/*
 * This structure contains the heads of the lists forming the object caches
 * and locks associated with the lists.
 */
typedef struct PK11_st_CACHE {
	PK11_SESSION *head;
	pthread_mutex_t *lock;
} PK11_CACHE;

/* structure for tracking handles of asymmetric key objects */
typedef struct PK11_active_st {
	CK_OBJECT_HANDLE h;
	unsigned int refcnt;
	struct PK11_active_st *prev;
	struct PK11_active_st *next;
} PK11_active;

extern pthread_mutex_t *find_lock[];
extern PK11_active *active_list[];
/*
 * These variables are specific for the RSA keys by reference code. See
 * e_pk11_pub.c for explanation.
 */
extern char *passphrasedialog;
extern CK_FLAGS pubkey_token_flags;

#define	LOCK_OBJSTORE(alg_type)	\
	(void) pthread_mutex_lock(find_lock[alg_type])
#define	UNLOCK_OBJSTORE(alg_type)	\
	(void) pthread_mutex_unlock(find_lock[alg_type])

extern PK11_SESSION *pk11_get_session(PK11_OPTYPE optype);
extern void pk11_return_session(PK11_SESSION *sp, PK11_OPTYPE optype);

#ifndef OPENSSL_NO_RSA
extern int pk11_destroy_rsa_key_objects(PK11_SESSION *session);
extern int pk11_destroy_rsa_object_pub(PK11_SESSION *sp, CK_BBOOL uselock);
extern int pk11_destroy_rsa_object_priv(PK11_SESSION *sp, CK_BBOOL uselock);
extern EVP_PKEY *pk11_load_privkey(ENGINE *e, const char *pubkey_file,
	UI_METHOD *ui_method, void *callback_data);
extern EVP_PKEY *pk11_load_pubkey(ENGINE *e, const char *pubkey_file,
	UI_METHOD *ui_method, void *callback_data);
extern RSA_METHOD *PK11_RSA(void);
#endif /* OPENSSL_NO_RSA */
#ifndef OPENSSL_NO_DSA
extern int pk11_destroy_dsa_key_objects(PK11_SESSION *session);
extern int pk11_destroy_dsa_object_pub(PK11_SESSION *sp, CK_BBOOL uselock);
extern int pk11_destroy_dsa_object_priv(PK11_SESSION *sp, CK_BBOOL uselock);
extern DSA_METHOD *PK11_DSA(void);
#endif /* OPENSSL_NO_DSA */
#ifndef OPENSSL_NO_DH
extern int pk11_destroy_dh_key_objects(PK11_SESSION *session);
extern int pk11_destroy_dh_object(PK11_SESSION *sp, CK_BBOOL uselock);
extern DH_METHOD *PK11_DH(void);
#endif /* OPENSSL_NO_DH */

extern int pk11_engine_pkey_methods(ENGINE *e, EVP_PKEY_METHOD **pmeth,
    const int **nids, int nid);

extern CK_FUNCTION_LIST_PTR pFuncList;

#ifdef	__cplusplus
}
#endif
#endif /* E_PK11_H */