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git.ipfire.org Git - thirdparty/openssl.git/blob - include/crypto/ec.h
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2 * Copyright 2018-2021 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* Internal EC functions for other submodules: not for application use */
12 #ifndef OSSL_CRYPTO_EC_H
13 # define OSSL_CRYPTO_EC_H
16 # include <openssl/opensslconf.h>
17 # include <openssl/evp.h>
19 const char *ossl_ec_curve_nid2name(int nid
);
20 int ossl_ec_curve_name2nid(const char *name
);
21 const char *ossl_ec_curve_nid2nist_int(int nid
);
22 int ossl_ec_curve_nist2nid_int(const char *name
);
23 int evp_pkey_ctx_set_ec_param_enc_prov(EVP_PKEY_CTX
*ctx
, int param_enc
);
25 # ifndef OPENSSL_NO_EC
26 # include <openssl/core.h>
27 # include <openssl/ec.h>
28 # include <openssl/x509.h>
29 # include "crypto/types.h"
32 * Computes the multiplicative inverse of x in the range
33 * [1,EC_GROUP::order), where EC_GROUP::order is the cardinality of the
34 * subgroup generated by the generator G:
36 * res := x^(-1) (mod EC_GROUP::order).
38 * This function expects the following two conditions to hold:
39 * - the EC_GROUP order is prime, and
40 * - x is included in the range [1, EC_GROUP::order).
42 * This function returns 1 on success, 0 on error.
44 * If the EC_GROUP order is even, this function explicitly returns 0 as
46 * In case any of the two conditions stated above is not satisfied,
47 * the correctness of its output is not guaranteed, even if the return
48 * value could still be 1 (as primality testing and a conditional modular
49 * reduction round on the input can be omitted by the underlying
50 * implementations for better SCA properties on regular input values).
52 __owur
int ossl_ec_group_do_inverse_ord(const EC_GROUP
*group
, BIGNUM
*res
,
53 const BIGNUM
*x
, BN_CTX
*ctx
);
56 * ECDH Key Derivation Function as defined in ANSI X9.63
58 int ossl_ecdh_kdf_X9_63(unsigned char *out
, size_t outlen
,
59 const unsigned char *Z
, size_t Zlen
,
60 const unsigned char *sinfo
, size_t sinfolen
,
61 const EVP_MD
*md
, OSSL_LIB_CTX
*libctx
,
64 int ossl_ec_key_public_check(const EC_KEY
*eckey
, BN_CTX
*ctx
);
65 int ossl_ec_key_public_check_quick(const EC_KEY
*eckey
, BN_CTX
*ctx
);
66 int ossl_ec_key_private_check(const EC_KEY
*eckey
);
67 int ossl_ec_key_pairwise_check(const EC_KEY
*eckey
, BN_CTX
*ctx
);
68 OSSL_LIB_CTX
*ossl_ec_key_get_libctx(const EC_KEY
*eckey
);
69 const char *ossl_ec_key_get0_propq(const EC_KEY
*eckey
);
70 void ossl_ec_key_set0_libctx(EC_KEY
*key
, OSSL_LIB_CTX
*libctx
);
73 int ossl_ec_group_todata(const EC_GROUP
*group
, OSSL_PARAM_BLD
*tmpl
,
74 OSSL_PARAM params
[], OSSL_LIB_CTX
*libctx
,
76 BN_CTX
*bnctx
, unsigned char **genbuf
);
77 int ossl_ec_group_fromdata(EC_KEY
*ec
, const OSSL_PARAM params
[]);
78 int ossl_ec_group_set_params(EC_GROUP
*group
, const OSSL_PARAM params
[]);
79 int ossl_ec_key_fromdata(EC_KEY
*ecx
, const OSSL_PARAM params
[],
81 int ossl_ec_key_otherparams_fromdata(EC_KEY
*ec
, const OSSL_PARAM params
[]);
82 int ossl_ec_key_is_foreign(const EC_KEY
*ec
);
83 EC_KEY
*ossl_ec_key_dup(const EC_KEY
*key
, int selection
);
84 EC_KEY
*ossl_ec_key_param_from_x509_algor(const X509_ALGOR
*palg
,
87 EC_KEY
*ossl_ec_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO
*p8inf
,
88 OSSL_LIB_CTX
*libctx
, const char *propq
);
90 int ossl_ec_set_ecdh_cofactor_mode(EC_KEY
*ec
, int mode
);
91 int ossl_ec_encoding_name2id(const char *name
);
92 int ossl_ec_encoding_param2id(const OSSL_PARAM
*p
, int *id
);
93 int ossl_ec_pt_format_name2id(const char *name
);
94 int ossl_ec_pt_format_param2id(const OSSL_PARAM
*p
, int *id
);
95 char *ossl_ec_pt_format_id2name(int id
);
97 char *ossl_ec_check_group_type_id2name(int flags
);
98 int ossl_ec_set_check_group_type_from_name(EC_KEY
*ec
, const char *name
);
100 # endif /* OPENSSL_NO_EC */