EC_KEY_get0_public_key(3ssl)

1EC_KEY_new(3)                       OpenSSL                      EC_KEY_new(3)
2
3
4

NAME

6       EC_KEY_new, EC_KEY_get_flags, EC_KEY_set_flags, EC_KEY_clear_flags,
7       EC_KEY_new_by_curve_name, EC_KEY_free, EC_KEY_copy, EC_KEY_dup,
8       EC_KEY_up_ref, EC_KEY_get0_group, EC_KEY_set_group,
9       EC_KEY_get0_private_key, EC_KEY_set_private_key,
10       EC_KEY_get0_public_key, EC_KEY_set_public_key, EC_KEY_get_enc_flags,
11       EC_KEY_set_enc_flags, EC_KEY_get_conv_form, EC_KEY_set_conv_form,
12       EC_KEY_get_key_method_data, EC_KEY_insert_key_method_data,
13       EC_KEY_set_asn1_flag, EC_KEY_precompute_mult, EC_KEY_generate_key,
14       EC_KEY_check_key, EC_KEY_set_public_key_affine_coordinates - Functions
15       for creating, destroying and manipulating EC_KEY objects.
16

SYNOPSIS

18        #include <openssl/ec.h>
19        #include <openssl/bn.h>
20
21        EC_KEY *EC_KEY_new(void);
22        int EC_KEY_get_flags(const EC_KEY *key);
23        void EC_KEY_set_flags(EC_KEY *key, int flags);
24        void EC_KEY_clear_flags(EC_KEY *key, int flags);
25        EC_KEY *EC_KEY_new_by_curve_name(int nid);
26        void EC_KEY_free(EC_KEY *key);
27        EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src);
28        EC_KEY *EC_KEY_dup(const EC_KEY *src);
29        int EC_KEY_up_ref(EC_KEY *key);
30        const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key);
31        int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group);
32        const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key);
33        int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv);
34        const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key);
35        int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub);
36        point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key);
37        void EC_KEY_set_conv_form(EC_KEY *eckey, point_conversion_form_t cform);
38        void *EC_KEY_get_key_method_data(EC_KEY *key,
39               void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *));
40        void EC_KEY_insert_key_method_data(EC_KEY *key, void *data,
41               void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *));
42        void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag);
43        int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx);
44        int EC_KEY_generate_key(EC_KEY *key);
45        int EC_KEY_check_key(const EC_KEY *key);
46        int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x, BIGNUM *y);
47

DESCRIPTION

49       An EC_KEY represents a public key and (optionaly) an associated private
50       key. A new EC_KEY (with no associated curve) can be constructed by
51       calling EC_KEY_new.  The reference count for the newly created EC_KEY
52       is initially set to 1. A curve can be associated with the EC_KEY by
53       calling EC_KEY_set_group.
54
55       Alternatively a new EC_KEY can be constructed by calling
56       EC_KEY_new_by_curve_name and supplying the nid of the associated curve.
57       Refer to EC_GROUP_new(3) for a description of curve names. This
58       function simply wraps calls to EC_KEY_new and
59       EC_GROUP_new_by_curve_name.
60
61       Calling EC_KEY_free decrements the reference count for the EC_KEY
62       object, and if it has dropped to zero then frees the memory associated
63       with it.
64
65       EC_KEY_copy copies the contents of the EC_KEY in src into dest.
66
67       EC_KEY_dup creates a new EC_KEY object and copies ec_key into it.
68
69       EC_KEY_up_ref increments the reference count associated with the EC_KEY
70       object.
71
72       EC_KEY_generate_key generates a new public and private key for the
73       supplied eckey object. eckey must have an EC_GROUP object associated
74       with it before calling this function. The private key is a random
75       integer (0 < priv_key < order, where order is the order of the EC_GROUP
76       object). The public key is an EC_POINT on the curve calculated by
77       multiplying the generator for the curve by the private key.
78
79       EC_KEY_check_key performs various sanity checks on the EC_KEY object to
80       confirm that it is valid.
81
82       EC_KEY_set_public_key_affine_coordinates sets the public key for key
83       based on its affine co-ordinates, i.e. it constructs an EC_POINT object
84       based on the supplied x and y values and sets the public key to be this
85       EC_POINT. It will also performs certain sanity checks on the key to
86       confirm that it is valid.
87
88       The functions EC_KEY_get0_group, EC_KEY_set_group,
89       EC_KEY_get0_private_key, EC_KEY_set_private_key,
90       EC_KEY_get0_public_key, and EC_KEY_set_public_key get and set the
91       EC_GROUP object, the private key and the EC_POINT public key for the
92       key respectively.
93
94       The functions EC_KEY_get_conv_form and EC_KEY_set_conv_form get and set
95       the point_conversion_form for the key. For a description of
96       point_conversion_forms please refer to EC_POINT_new(3).
97
98       EC_KEY_insert_key_method_data and EC_KEY_get_key_method_data enable the
99       caller to associate arbitrary additional data specific to the elliptic
100       curve scheme being used with the EC_KEY object. This data is treated as
101       a "black box" by the ec library. The data to be stored by
102       EC_KEY_insert_key_method_data is provided in the data parameter, which
103       must have associated functions for duplicating, freeing and
104       "clear_freeing" the data item. If a subsequent
105       EC_KEY_get_key_method_data call is issued, the functions for
106       duplicating, freeing and "clear_freeing" the data item must be provided
107       again, and they must be the same as they were when the data item was
108       inserted.
109
110       EC_KEY_set_flags sets the flags in the flags parameter on the EC_KEY
111       object. Any flags that are already set are left set. The currently
112       defined standard flags are EC_FLAG_NON_FIPS_ALLOW and
113       EC_FLAG_FIPS_CHECKED. In addition there is the flag
114       EC_FLAG_COFACTOR_ECDH which is specific to ECDH and is defined in
115       ecdh.h. EC_KEY_get_flags returns the current flags that are set for
116       this EC_KEY. EC_KEY_clear_flags clears the flags indicated by the flags
117       parameter. All other flags are left in their existing state.
118
119       EC_KEY_set_asn1_flag sets the asn1_flag on the underlying EC_GROUP
120       object (if set). Refer to EC_GROUP_copy(3) for further information on
121       the asn1_flag.
122
123       EC_KEY_precompute_mult stores multiples of the underlying EC_GROUP
124       generator for faster point multiplication. See also EC_POINT_add(3).
125

RETURN VALUES

127       EC_KEY_new, EC_KEY_new_by_curve_name and EC_KEY_dup return a pointer to
128       the newly created EC_KEY object, or NULL on error.
129
130       EC_KEY_get_flags returns the flags associated with the EC_KEY object as
131       an integer.
132
133       EC_KEY_copy returns a pointer to the destination key, or NULL on error.
134
135       EC_KEY_up_ref, EC_KEY_set_group, EC_KEY_set_private_key,
136       EC_KEY_set_public_key, EC_KEY_precompute_mult, EC_KEY_generate_key,
137       EC_KEY_check_key and EC_KEY_set_public_key_affine_coordinates return 1
138       on success or 0 on error.
139
140       EC_KEY_get0_group returns the EC_GROUP associated with the EC_KEY.
141
142       EC_KEY_get0_private_key returns the private key associated with the
143       EC_KEY.
144
145       EC_KEY_get_conv_form return the point_conversion_form for the EC_KEY.
146

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUES

SEE ALSO