EC_KEY_set_flags(3)



EC_KEY_new(3)                OpenSSL                EC_KEY_new(3)

NAME

     EC_KEY_new, EC_KEY_get_flags, EC_KEY_set_flags,
     EC_KEY_clear_flags, EC_KEY_new_by_curve_name, EC_KEY_free,
     EC_KEY_copy, EC_KEY_dup, EC_KEY_up_ref, EC_KEY_get0_group,
     EC_KEY_set_group, EC_KEY_get0_private_key,
     EC_KEY_set_private_key, EC_KEY_get0_public_key,
     EC_KEY_set_public_key, EC_KEY_get_enc_flags,
     EC_KEY_set_enc_flags, EC_KEY_get_conv_form,
     EC_KEY_set_conv_form, EC_KEY_get_key_method_data,
     EC_KEY_insert_key_method_data, EC_KEY_set_asn1_flag,
     EC_KEY_precompute_mult, EC_KEY_generate_key,
     EC_KEY_check_key, EC_KEY_set_public_key_affine_coordinates -
     Functions for creating, destroying and manipulating EC_KEY
     objects.

SYNOPSIS

      #include <openssl/ec.h>
      #include <openssl/bn.h>

      EC_KEY *EC_KEY_new(void);
      int EC_KEY_get_flags(const EC_KEY *key);
      void EC_KEY_set_flags(EC_KEY *key, int flags);
      void EC_KEY_clear_flags(EC_KEY *key, int flags);
      EC_KEY *EC_KEY_new_by_curve_name(int nid);
      void EC_KEY_free(EC_KEY *key);
      EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src);
      EC_KEY *EC_KEY_dup(const EC_KEY *src);
      int EC_KEY_up_ref(EC_KEY *key);
      const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key);
      int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group);
      const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key);
      int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv);
      const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key);
      int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub);
      point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key);
      void EC_KEY_set_conv_form(EC_KEY *eckey, point_conversion_form_t cform);
      void *EC_KEY_get_key_method_data(EC_KEY *key,
             void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *));
      void EC_KEY_insert_key_method_data(EC_KEY *key, void *data,
             void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *));
      void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag);
      int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx);
      int EC_KEY_generate_key(EC_KEY *key);
      int EC_KEY_check_key(const EC_KEY *key);
      int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x, BIGNUM *y);

DESCRIPTION

     An EC_KEY represents a public key and (optionaly) an
     associated private key. A new EC_KEY (with no associated
     curve) can be constructed by calling EC_KEY_new.  The
     reference count for the newly created EC_KEY is initially
     set to 1. A curve can be associated with the EC_KEY by

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EC_KEY_new(3)                OpenSSL                EC_KEY_new(3)

     calling EC_KEY_set_group.

     Alternatively a new EC_KEY can be constructed by calling
     EC_KEY_new_by_curve_name and supplying the nid of the
     associated curve. Refer to EC_GROUP_new(3) for a description
     of curve names. This function simply wraps calls to
     EC_KEY_new and EC_GROUP_new_by_curve_name.

     Calling EC_KEY_free decrements the reference count for the
     EC_KEY object, and if it has dropped to zero then frees the
     memory associated with it.

     EC_KEY_copy copies the contents of the EC_KEY in src into
     dest.

     EC_KEY_dup creates a new EC_KEY object and copies ec_key
     into it.

     EC_KEY_up_ref increments the reference count associated with
     the EC_KEY object.

     EC_KEY_generate_key generates a new public and private key
     for the supplied eckey object. eckey must have an EC_GROUP
     object associated with it before calling this function. The
     private key is a random integer (0 < priv_key < order, where
     order is the order of the EC_GROUP object). The public key
     is an EC_POINT on the curve calculated by multiplying the
     generator for the curve by the private key.

     EC_KEY_check_key performs various sanity checks on the
     EC_KEY object to confirm that it is valid.

     EC_KEY_set_public_key_affine_coordinates sets the public key
     for key based on its affine co-ordinates, i.e. it constructs
     an EC_POINT object based on the supplied x and y values and
     sets the public key to be this EC_POINT. It will also
     performs certain sanity checks on the key to confirm that it
     is valid.

     The functions EC_KEY_get0_group, EC_KEY_set_group,
     EC_KEY_get0_private_key, EC_KEY_set_private_key,
     EC_KEY_get0_public_key, and EC_KEY_set_public_key get and
     set the EC_GROUP object, the private key and the EC_POINT
     public key for the key respectively.

     The functions EC_KEY_get_conv_form and EC_KEY_set_conv_form
     get and set the point_conversion_form for the key. For a
     description of point_conversion_forms please refer to
     EC_POINT_new(3).

     EC_KEY_insert_key_method_data and EC_KEY_get_key_method_data
     enable the caller to associate arbitrary additional data

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EC_KEY_new(3)                OpenSSL                EC_KEY_new(3)

     specific to the elliptic curve scheme being used with the
     EC_KEY object. This data is treated as a "black box" by the
     ec library. The data to be stored by
     EC_KEY_insert_key_method_data is provided in the data
     parameter, which must have associated functions for
     duplicating, freeing and "clear_freeing" the data item. If a
     subsequent EC_KEY_get_key_method_data call is issued, the
     functions for duplicating, freeing and "clear_freeing" the
     data item must be provided again, and they must be the same
     as they were when the data item was inserted.

     EC_KEY_set_flags sets the flags in the flags parameter on
     the EC_KEY object. Any flags that are already set are left
     set. The currently defined standard flags are
     EC_FLAG_NON_FIPS_ALLOW and EC_FLAG_FIPS_CHECKED. In addition
     there is the flag EC_FLAG_COFACTOR_ECDH which is specific to
     ECDH and is defined in ecdh.h. EC_KEY_get_flags returns the
     current flags that are set for this EC_KEY.
     EC_KEY_clear_flags clears the flags indicated by the flags
     parameter. All other flags are left in their existing state.

     EC_KEY_set_asn1_flag sets the asn1_flag on the underlying
     EC_GROUP object (if set). Refer to EC_GROUP_copy(3) for
     further information on the asn1_flag.

     EC_KEY_precompute_mult stores multiples of the underlying
     EC_GROUP generator for faster point multiplication. See also
     EC_POINT_add(3).

RETURN VALUES

     EC_KEY_new, EC_KEY_new_by_curve_name and EC_KEY_dup return a
     pointer to the newly created EC_KEY object, or NULL on
     error.

     EC_KEY_get_flags returns the flags associated with the
     EC_KEY object as an integer.

     EC_KEY_copy returns a pointer to the destination key, or
     NULL on error.

     EC_KEY_up_ref, EC_KEY_set_group, EC_KEY_set_private_key,
     EC_KEY_set_public_key, EC_KEY_precompute_mult,
     EC_KEY_generate_key, EC_KEY_check_key and
     EC_KEY_set_public_key_affine_coordinates return 1 on success
     or 0 on error.

     EC_KEY_get0_group returns the EC_GROUP associated with the
     EC_KEY.

     EC_KEY_get0_private_key returns the private key associated
     with the EC_KEY.

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EC_KEY_new(3)                OpenSSL                EC_KEY_new(3)

     EC_KEY_get_conv_form return the point_conversion_form for
     the EC_KEY.

EC_KEY_set_flags(3)

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUES

SEE ALSO