/* ec.h for openssl */

#ifndef WOLFSSL_EC_H_
# define WOLFSSL_EC_H_

# include "bn.h"
# include "../wolfcrypt/ecc.h"

# ifdef __cplusplus
extern "C" {
# endif

/* Map OpenSSL NID value */
enum {
    POINT_CONVERSION_UNCOMPRESSED = 4,

    # ifdef HAVE_ECC
    /* Use ecc_curve_type enum values for NID */
    NID_X9_62_prime192v1   = ECC_SECP192R1,
    NID_X9_62_prime256v1   = ECC_SECP256R1,
    NID_secp112r1          = ECC_SECP112R1,
    NID_secp112r2          = ECC_SECP112R2,
    NID_secp128r1          = ECC_SECP128R1,
    NID_secp128r2          = ECC_SECP128R2,
    NID_secp160r1          = ECC_SECP160R1,
    NID_secp160r2          = ECC_SECP160R2,
    NID_secp224r1          = ECC_SECP224R1,
    NID_secp384r1          = ECC_SECP384R1,
    NID_secp521r1          = ECC_SECP521R1,
    NID_secp160k1          = ECC_SECP160K1,
    NID_secp192k1          = ECC_SECP192K1,
    NID_secp224k1          = ECC_SECP224K1,
    NID_secp256k1          = ECC_SECP256K1,
    NID_brainpoolP160r1    = ECC_BRAINPOOLP160R1,
    NID_brainpoolP192r1    = ECC_BRAINPOOLP192R1,
    NID_brainpoolP224r1    = ECC_BRAINPOOLP224R1,
    NID_brainpoolP256r1    = ECC_BRAINPOOLP256R1,
    NID_brainpoolP320r1    = ECC_BRAINPOOLP320R1,
    NID_brainpoolP384r1    = ECC_BRAINPOOLP384R1,
    NID_brainpoolP512r1    = ECC_BRAINPOOLP512R1,
    # endif // ifdef HAVE_ECC

    OPENSSL_EC_NAMED_CURVE = 0x001
};

# ifndef WOLFSSL_EC_TYPE_DEFINED /* guard on redeclaration */
typedef struct WOLFSSL_EC_KEY WOLFSSL_EC_KEY;
typedef struct WOLFSSL_EC_POINT WOLFSSL_EC_POINT;
typedef struct WOLFSSL_EC_GROUP WOLFSSL_EC_GROUP;
#  define WOLFSSL_EC_TYPE_DEFINED
# endif

typedef WOLFSSL_EC_KEY EC_KEY;
typedef WOLFSSL_EC_GROUP EC_GROUP;
typedef WOLFSSL_EC_POINT EC_POINT;

struct WOLFSSL_EC_POINT {
    WOLFSSL_BIGNUM * X;
    WOLFSSL_BIGNUM * Y;
    WOLFSSL_BIGNUM * Z;

    void *           internal; /* our ECC point */
    char             inSet;    /* internal set from external ? */
    char             exSet;    /* external set from internal ? */
};

struct WOLFSSL_EC_GROUP {
    int curve_idx; /* index of curve, used by WolfSSL as reference */
    int curve_nid; /* NID of curve, used by OpenSSL/OpenSSH as reference */
    int curve_oid; /* OID of curve, used by OpenSSL/OpenSSH as reference */
};

struct WOLFSSL_EC_KEY {
    WOLFSSL_EC_GROUP * group;
    WOLFSSL_EC_POINT * pub_key;
    WOLFSSL_BIGNUM *   priv_key;

    void *             internal; /* our ECC Key */
    char               inSet;    /* internal set from external ? */
    char               exSet;    /* external set from internal ? */
};

WOLFSSL_API
int
wolfSSL_ECPoint_i2d(const WOLFSSL_EC_GROUP * curve,
  const WOLFSSL_EC_POINT * p,
  unsigned char * out, unsigned int * len);
WOLFSSL_API
int wolfSSL_ECPoint_d2i(unsigned char * in, unsigned int len,
  const WOLFSSL_EC_GROUP * curve, WOLFSSL_EC_POINT * p);
WOLFSSL_API
int
wolfSSL_EC_KEY_LoadDer(WOLFSSL_EC_KEY * key,
  const unsigned char * der, int derSz);
WOLFSSL_API
void
wolfSSL_EC_KEY_free(WOLFSSL_EC_KEY * key);
WOLFSSL_API
WOLFSSL_EC_POINT *
wolfSSL_EC_KEY_get0_public_key(const WOLFSSL_EC_KEY * key);
WOLFSSL_API
const WOLFSSL_EC_GROUP *
wolfSSL_EC_KEY_get0_group(const WOLFSSL_EC_KEY * key);
WOLFSSL_API
int
wolfSSL_EC_KEY_set_private_key(WOLFSSL_EC_KEY * key,
  const WOLFSSL_BIGNUM *                        priv_key);
WOLFSSL_API
WOLFSSL_BIGNUM *
wolfSSL_EC_KEY_get0_private_key(const WOLFSSL_EC_KEY * key);
WOLFSSL_API
WOLFSSL_EC_KEY *
wolfSSL_EC_KEY_new_by_curve_name(int nid);
WOLFSSL_API
WOLFSSL_EC_KEY *
wolfSSL_EC_KEY_new(void);
WOLFSSL_API
int
wolfSSL_EC_KEY_set_group(WOLFSSL_EC_KEY * key, WOLFSSL_EC_GROUP * group);
WOLFSSL_API
int
wolfSSL_EC_KEY_generate_key(WOLFSSL_EC_KEY * key);
WOLFSSL_API
void
wolfSSL_EC_KEY_set_asn1_flag(WOLFSSL_EC_KEY * key, int asn1_flag);
WOLFSSL_API
int
wolfSSL_EC_KEY_set_public_key(WOLFSSL_EC_KEY * key,
  const WOLFSSL_EC_POINT *                     pub);
WOLFSSL_API
void
wolfSSL_EC_GROUP_set_asn1_flag(WOLFSSL_EC_GROUP * group, int flag);
WOLFSSL_API
WOLFSSL_EC_GROUP *
wolfSSL_EC_GROUP_new_by_curve_name(int nid);
WOLFSSL_API
int
wolfSSL_EC_GROUP_cmp(const WOLFSSL_EC_GROUP * a, const WOLFSSL_EC_GROUP * b,
  WOLFSSL_BN_CTX * ctx);
WOLFSSL_API
int
wolfSSL_EC_GROUP_get_curve_name(const WOLFSSL_EC_GROUP * group);
WOLFSSL_API
int
wolfSSL_EC_GROUP_get_degree(const WOLFSSL_EC_GROUP * group);
WOLFSSL_API
int
wolfSSL_EC_GROUP_get_order(const WOLFSSL_EC_GROUP * group,
  WOLFSSL_BIGNUM * order, WOLFSSL_BN_CTX * ctx);
WOLFSSL_API
void
wolfSSL_EC_GROUP_free(WOLFSSL_EC_GROUP * group);
WOLFSSL_API
WOLFSSL_EC_POINT *
wolfSSL_EC_POINT_new(const WOLFSSL_EC_GROUP * group);
WOLFSSL_API
int
wolfSSL_EC_POINT_get_affine_coordinates_GFp(const WOLFSSL_EC_GROUP * group,
  const WOLFSSL_EC_POINT *                                           p,
  WOLFSSL_BIGNUM *                                                   x,
  WOLFSSL_BIGNUM *                                                   y,
  WOLFSSL_BN_CTX *                                                   ctx);
WOLFSSL_API
int
wolfSSL_EC_POINT_mul(const WOLFSSL_EC_GROUP * group, WOLFSSL_EC_POINT * r,
  const WOLFSSL_BIGNUM * n,
  const WOLFSSL_EC_POINT * q, const WOLFSSL_BIGNUM * m,
  WOLFSSL_BN_CTX * ctx);
WOLFSSL_API
void
wolfSSL_EC_POINT_clear_free(WOLFSSL_EC_POINT * point);
WOLFSSL_API
int
wolfSSL_EC_POINT_cmp(const WOLFSSL_EC_GROUP * group,
  const WOLFSSL_EC_POINT * a, const WOLFSSL_EC_POINT * b,
  WOLFSSL_BN_CTX * ctx);
WOLFSSL_API
void
wolfSSL_EC_POINT_free(WOLFSSL_EC_POINT * point);
WOLFSSL_API
int
wolfSSL_EC_POINT_is_at_infinity(const WOLFSSL_EC_GROUP * group,
  const WOLFSSL_EC_POINT *                               a);

# define EC_KEY_free                wolfSSL_EC_KEY_free
# define EC_KEY_get0_public_key     wolfSSL_EC_KEY_get0_public_key
# define EC_KEY_get0_group          wolfSSL_EC_KEY_get0_group
# define EC_KEY_set_private_key     wolfSSL_EC_KEY_set_private_key
# define EC_KEY_get0_private_key    wolfSSL_EC_KEY_get0_private_key
# define EC_KEY_new_by_curve_name   wolfSSL_EC_KEY_new_by_curve_name
# define EC_KEY_set_group           wolfSSL_EC_KEY_set_group
# define EC_KEY_generate_key        wolfSSL_EC_KEY_generate_key
# define EC_KEY_set_asn1_flag       wolfSSL_EC_KEY_set_asn1_flag
# define EC_KEY_set_public_key      wolfSSL_EC_KEY_set_public_key
# define EC_KEY_new                 wolfSSL_EC_KEY_new

# define EC_GROUP_set_asn1_flag     wolfSSL_EC_GROUP_set_asn1_flag
# define EC_GROUP_new_by_curve_name wolfSSL_EC_GROUP_new_by_curve_name
# define EC_GROUP_cmp               wolfSSL_EC_GROUP_cmp
# define EC_GROUP_get_curve_name    wolfSSL_EC_GROUP_get_curve_name
# define EC_GROUP_get_degree        wolfSSL_EC_GROUP_get_degree
# define EC_GROUP_get_order         wolfSSL_EC_GROUP_get_order
# define EC_GROUP_free              wolfSSL_EC_GROUP_free

# define EC_POINT_new               wolfSSL_EC_POINT_new
# define EC_POINT_get_affine_coordinates_GFp \
    wolfSSL_EC_POINT_get_affine_coordinates_GFp
# define EC_POINT_mul               wolfSSL_EC_POINT_mul
# define EC_POINT_clear_free        wolfSSL_EC_POINT_clear_free
# define EC_POINT_cmp               wolfSSL_EC_POINT_cmp
# define EC_POINT_free              wolfSSL_EC_POINT_free
# define EC_POINT_is_at_infinity    wolfSSL_EC_POINT_is_at_infinity

# define EC_POINT_dump              wolfSSL_EC_POINT_dump

# ifdef __cplusplus
} /* extern "C" */
# endif

#endif /* header */
