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Diffstat (limited to 'src/lib/libcrypto/doc/EC_KEY_new.pod')
| -rw-r--r-- | src/lib/libcrypto/doc/EC_KEY_new.pod | 115 |
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diff --git a/src/lib/libcrypto/doc/EC_KEY_new.pod b/src/lib/libcrypto/doc/EC_KEY_new.pod new file mode 100644 index 0000000000..b762cbcb73 --- /dev/null +++ b/src/lib/libcrypto/doc/EC_KEY_new.pod | |||
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| 1 | =pod | ||
| 2 | |||
| 3 | =head1 NAME | ||
| 4 | |||
| 5 | 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 B<EC_KEY> objects. | ||
| 6 | |||
| 7 | =head1 SYNOPSIS | ||
| 8 | |||
| 9 | #include <openssl/ec.h> | ||
| 10 | #include <openssl/bn.h> | ||
| 11 | |||
| 12 | EC_KEY *EC_KEY_new(void); | ||
| 13 | int EC_KEY_get_flags(const EC_KEY *key); | ||
| 14 | void EC_KEY_set_flags(EC_KEY *key, int flags); | ||
| 15 | void EC_KEY_clear_flags(EC_KEY *key, int flags); | ||
| 16 | EC_KEY *EC_KEY_new_by_curve_name(int nid); | ||
| 17 | void EC_KEY_free(EC_KEY *key); | ||
| 18 | EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src); | ||
| 19 | EC_KEY *EC_KEY_dup(const EC_KEY *src); | ||
| 20 | int EC_KEY_up_ref(EC_KEY *key); | ||
| 21 | const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key); | ||
| 22 | int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group); | ||
| 23 | const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key); | ||
| 24 | int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv); | ||
| 25 | const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key); | ||
| 26 | int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub); | ||
| 27 | unsigned int EC_KEY_get_enc_flags(const EC_KEY *key); | ||
| 28 | void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags); | ||
| 29 | point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key); | ||
| 30 | void EC_KEY_set_conv_form(EC_KEY *eckey, point_conversion_form_t cform); | ||
| 31 | void *EC_KEY_get_key_method_data(EC_KEY *key, | ||
| 32 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)); | ||
| 33 | void EC_KEY_insert_key_method_data(EC_KEY *key, void *data, | ||
| 34 | void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)); | ||
| 35 | void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag); | ||
| 36 | int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx); | ||
| 37 | int EC_KEY_generate_key(EC_KEY *key); | ||
| 38 | int EC_KEY_check_key(const EC_KEY *key); | ||
| 39 | int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x, BIGNUM *y); | ||
| 40 | |||
| 41 | =head1 DESCRIPTION | ||
| 42 | |||
| 43 | 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. | ||
| 44 | The reference count for the newly created EC_KEY is initially set to 1. A curve can be associated with the EC_KEY by calling | ||
| 45 | EC_KEY_set_group. | ||
| 46 | |||
| 47 | 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 L<EC_GROUP_new(3)|EC_GROUP_new(3)> for a description of curve names. This function simply wraps calls to EC_KEY_new and | ||
| 48 | EC_GROUP_new_by_curve_name. | ||
| 49 | |||
| 50 | 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 | ||
| 51 | with it. | ||
| 52 | |||
| 53 | EC_KEY_copy copies the contents of the EC_KEY in B<src> into B<dest>. | ||
| 54 | |||
| 55 | EC_KEY_dup creates a new EC_KEY object and copies B<ec_key> into it. | ||
| 56 | |||
| 57 | EC_KEY_up_ref increments the reference count associated with the EC_KEY object. | ||
| 58 | |||
| 59 | EC_KEY_generate_key generates a new public and private key for the supplied B<eckey> object. B<eckey> must have an EC_GROUP object | ||
| 60 | associated with it before calling this function. The private key is a random integer (0 < priv_key < order, where order is the order | ||
| 61 | 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 | ||
| 62 | private key. | ||
| 63 | |||
| 64 | EC_KEY_check_key performs various sanity checks on the EC_KEY object to confirm that it is valid. | ||
| 65 | |||
| 66 | EC_KEY_set_public_key_affine_coordinates sets the public key for B<key> based on its affine co-ordinates, i.e. it constructs an EC_POINT | ||
| 67 | object based on the supplied B<x> and B<y> values and sets the public key to be this EC_POINT. It will also performs certain sanity checks | ||
| 68 | on the key to confirm that it is valid. | ||
| 69 | |||
| 70 | 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 B<key> respectively. | ||
| 71 | |||
| 72 | The functions EC_KEY_get_enc_flags and EC_KEY_set_enc_flags get and set the value of the encoding flags for the B<key>. There are two encoding | ||
| 73 | flags currently defined - EC_PKEY_NO_PARAMETERS and EC_PKEY_NO_PUBKEY. These flags define the behaviour of how the B<key> is | ||
| 74 | converted into ASN1 in a call to i2d_ECPrivateKey. If EC_PKEY_NO_PARAMETERS is set then the public parameters for the curve are not encoded | ||
| 75 | along with the private key. If EC_PKEY_NO_PUBKEY is set then the public key is not encoded along with the private key. | ||
| 76 | |||
| 77 | The functions EC_KEY_get_conv_form and EC_KEY_set_conv_form get and set the point_conversion_form for the B<key>. For a description | ||
| 78 | of point_conversion_forms please refer to L<EC_POINT_new(3)|EC_POINT_new(3)>. | ||
| 79 | |||
| 80 | EC_KEY_insert_key_method_data and EC_KEY_get_key_method_data enable the caller to associate arbitary additional data specific to the | ||
| 81 | 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 B<data> parameter, which must have 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. | ||
| 82 | |||
| 83 | EC_KEY_set_flags sets the flags in the B<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 B<flags> parameter. All other flags are left in their existing state. | ||
| 84 | |||
| 85 | EC_KEY_set_asn1_flag sets the asn1_flag on the underlying EC_GROUP object (if set). Refer to L<EC_GROUP_copy(3)|EC_GROUP_copy(3)> for further information on the asn1_flag. | ||
| 86 | |||
| 87 | EC_KEY_precompute_mult stores multiples of the underlying EC_GROUP generator for faster point multiplication. See also L<EC_POINT_add(3)|EC_POINT_add(3)>. | ||
| 88 | |||
| 89 | |||
| 90 | =head1 RETURN VALUES | ||
| 91 | |||
| 92 | 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. | ||
| 93 | |||
| 94 | EC_KEY_get_flags returns the flags associated with the EC_KEY object as an integer. | ||
| 95 | |||
| 96 | EC_KEY_copy returns a pointer to the destination key, or NULL on error. | ||
| 97 | |||
| 98 | 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. | ||
| 99 | |||
| 100 | EC_KEY_get0_group returns the EC_GROUP associated with the EC_KEY. | ||
| 101 | |||
| 102 | EC_KEY_get0_private_key returns the private key associated with the EC_KEY. | ||
| 103 | |||
| 104 | EC_KEY_get_enc_flags returns the value of the current encoding flags for the EC_KEY. | ||
| 105 | |||
| 106 | EC_KEY_get_conv_form return the point_conversion_form for the EC_KEY. | ||
| 107 | |||
| 108 | |||
| 109 | =head1 SEE ALSO | ||
| 110 | |||
| 111 | L<crypto(3)|crypto(3)>, L<ec(3)|ec(3)>, L<EC_GROUP_new(3)|EC_GROUP_new(3)>, L<EC_GROUP_copy(3)|EC_GROUP_copy(3)>, | ||
| 112 | L<EC_POINT_new(3)|EC_POINT_new(3)>, L<EC_POINT_add(3)|EC_POINT_add(3)>, | ||
| 113 | L<EC_GFp_simple_method(3)|EC_GFp_simple_method(3)>, L<d2i_ECPKParameters(3)|d2i_ECPKParameters(3)> | ||
| 114 | |||
| 115 | =cut | ||
