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/*
 * Copyright (c) 2007, 2017, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/* *********************************************************************
 *
 * The Original Code is the Netscape security libraries.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1994-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Dr Vipul Gupta <vipul.gupta@sun.com> and
 *   Douglas Stebila <douglas@stebila.ca>, Sun Microsystems Laboratories
 *
 * Last Modified Date from the Original Code: May 2017
 *********************************************************************** */

#ifndef _ECC_IMPL_H
#define _ECC_IMPL_H

#ifdef __cplusplus
extern "C" {
#endif

#include <sys/types.h>
#include "ecl-exp.h"

/*
 * Multi-platform definitions
 */
#ifdef __linux__
#define B_FALSE FALSE
#define B_TRUE TRUE
typedef unsigned char uint8_t;
typedef unsigned long ulong_t;
typedef enum { B_FALSE, B_TRUE } boolean_t;
#endif /* __linux__ */

#ifdef _ALLBSD_SOURCE
#include <stdint.h>
#define B_FALSE FALSE
#define B_TRUE TRUE
typedef unsigned long ulong_t;
typedef enum boolean { B_FALSE, B_TRUE } boolean_t;
#endif /* _ALLBSD_SOURCE */

#ifdef AIX
#define B_FALSE FALSE
#define B_TRUE TRUE
typedef unsigned char uint8_t;
typedef unsigned long ulong_t;
#endif /* AIX */

#ifdef _WIN32
typedef unsigned char uint8_t;
typedef unsigned long ulong_t;
typedef enum boolean { B_FALSE, B_TRUE } boolean_t;
#define strdup _strdup          /* Replace POSIX name with ISO C++ name */
#endif /* _WIN32 */

#ifndef _KERNEL
#include <stdlib.h>
#endif  /* _KERNEL */

#define EC_MAX_DIGEST_LEN 1024  /* max digest that can be signed */
#define EC_MAX_POINT_LEN 145    /* max len of DER encoded Q */
#define EC_MAX_VALUE_LEN 72     /* max len of ANSI X9.62 private value d */
#define EC_MAX_SIG_LEN 144      /* max signature len for supported curves */
#define EC_MIN_KEY_LEN  112     /* min key length in bits */
#define EC_MAX_KEY_LEN  571     /* max key length in bits */
#define EC_MAX_OID_LEN 10       /* max length of OID buffer */

/*
 * Various structures and definitions from NSS are here.
 */

#ifdef _KERNEL
#define PORT_ArenaAlloc(a, n, f)        kmem_alloc((n), (f))
#define PORT_ArenaZAlloc(a, n, f)       kmem_zalloc((n), (f))
#define PORT_ArenaGrow(a, b, c, d)      NULL
#define PORT_ZAlloc(n, f)               kmem_zalloc((n), (f))
#define PORT_Alloc(n, f)                kmem_alloc((n), (f))
#else
#define PORT_ArenaAlloc(a, n, f)        malloc((n))
#define PORT_ArenaZAlloc(a, n, f)       calloc(1, (n))
#define PORT_ArenaGrow(a, b, c, d)      NULL
#define PORT_ZAlloc(n, f)               calloc(1, (n))
#define PORT_Alloc(n, f)                malloc((n))
#endif

#define PORT_NewArena(b)                (char *)12345
#define PORT_ArenaMark(a)               NULL
#define PORT_ArenaUnmark(a, b)
#define PORT_ArenaRelease(a, m)
#define PORT_FreeArena(a, b)
#define PORT_Strlen(s)                  strlen((s))
#define PORT_SetError(e)

#define PRBool                          boolean_t
#define PR_TRUE                         B_TRUE
#define PR_FALSE                        B_FALSE

#ifdef _KERNEL
#define PORT_Assert                     ASSERT
#define PORT_Memcpy(t, f, l)            bcopy((f), (t), (l))
#else
#define PORT_Assert                     assert
#define PORT_Memcpy(t, f, l)            memcpy((t), (f), (l))
#endif

#define CHECK_OK(func) if (func == NULL) goto cleanup
#define CHECK_SEC_OK(func) if (SECSuccess != (rv = func)) goto cleanup

typedef enum {
        siBuffer = 0,
        siClearDataBuffer = 1,
        siCipherDataBuffer = 2,
        siDERCertBuffer = 3,
        siEncodedCertBuffer = 4,
        siDERNameBuffer = 5,
        siEncodedNameBuffer = 6,
        siAsciiNameString = 7,
        siAsciiString = 8,
        siDEROID = 9,
        siUnsignedInteger = 10,
        siUTCTime = 11,
        siGeneralizedTime = 12
} SECItemType;

typedef struct SECItemStr SECItem;

struct SECItemStr {
        SECItemType type;
        unsigned char *data;
        unsigned int len;
};

typedef SECItem SECKEYECParams;

typedef enum { ec_params_explicit,
               ec_params_named
} ECParamsType;

typedef enum { ec_field_GFp = 1,
               ec_field_GF2m
} ECFieldType;

struct ECFieldIDStr {
    int         size;   /* field size in bits */
    ECFieldType type;
    union {
        SECItem  prime; /* prime p for (GFp) */
        SECItem  poly;  /* irreducible binary polynomial for (GF2m) */
    } u;
    int         k1;     /* first coefficient of pentanomial or
                         * the only coefficient of trinomial
                         */
    int         k2;     /* two remaining coefficients of pentanomial */
    int         k3;
};
typedef struct ECFieldIDStr ECFieldID;

struct ECCurveStr {
        SECItem a;      /* contains octet stream encoding of
                         * field element (X9.62 section 4.3.3)
                         */
        SECItem b;
        SECItem seed;
};
typedef struct ECCurveStr ECCurve;

typedef void PRArenaPool;

struct ECParamsStr {
    PRArenaPool * arena;
    ECParamsType  type;
    ECFieldID     fieldID;
    ECCurve       curve;
    SECItem       base;
    SECItem       order;
    int           cofactor;
    SECItem       DEREncoding;
    ECCurveName   name;
    SECItem       curveOID;
};
typedef struct ECParamsStr ECParams;

struct ECPublicKeyStr {
    ECParams ecParams;
    SECItem publicValue;   /* elliptic curve point encoded as
                            * octet stream.
                            */
};
typedef struct ECPublicKeyStr ECPublicKey;

struct ECPrivateKeyStr {
    ECParams ecParams;
    SECItem publicValue;   /* encoded ec point */
    SECItem privateValue;  /* private big integer */
    SECItem version;       /* As per SEC 1, Appendix C, Section C.4 */
};
typedef struct ECPrivateKeyStr ECPrivateKey;

typedef enum _SECStatus {
        SECBufferTooSmall = -3,
        SECWouldBlock = -2,
        SECFailure = -1,
        SECSuccess = 0
} SECStatus;

#ifdef _KERNEL
#define RNG_GenerateGlobalRandomBytes(p,l) ecc_knzero_random_generator((p), (l))
#else
/*
 This function is no longer required because the random bytes are now
 supplied by the caller. Force a failure.
*/
#define RNG_GenerateGlobalRandomBytes(p,l) SECFailure
#endif
#define CHECK_MPI_OK(func) if (MP_OKAY > (err = func)) goto cleanup
#define MP_TO_SEC_ERROR(err)

#define SECITEM_TO_MPINT(it, mp)                                        \
        CHECK_MPI_OK(mp_read_unsigned_octets((mp), (it).data, (it).len))

extern int ecc_knzero_random_generator(uint8_t *, size_t);
extern ulong_t soft_nzero_random_generator(uint8_t *, ulong_t);

extern SECStatus EC_DecodeParams(const SECItem *, ECParams **, int);

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