1 /* crypto/ecdh/ecdh.h */
2 /* ====================================================================
3  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
4  *
5  * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
6  * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
7  * to the OpenSSL project.
8  *
9  * The ECC Code is licensed pursuant to the OpenSSL open source
10  * license provided below.
11  *
12  * The ECDH software is originally written by Douglas Stebila of
13  * Sun Microsystems Laboratories.
14  *
15  */
16 /* ====================================================================
17  * Copyright (c) 2000-2002 The OpenSSL Project.  All rights reserved.
18  *
19  * Redistribution and use in source and binary forms, with or without
20  * modification, are permitted provided that the following conditions
21  * are met:
22  *
23  * 1. Redistributions of source code must retain the above copyright
24  *    notice, this list of conditions and the following disclaimer.
25  *
26  * 2. Redistributions in binary form must reproduce the above copyright
27  *    notice, this list of conditions and the following disclaimer in
28  *    the documentation and/or other materials provided with the
29  *    distribution.
30  *
31  * 3. All advertising materials mentioning features or use of this
32  *    software must display the following acknowledgment:
33  *    "This product includes software developed by the OpenSSL Project
34  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
35  *
36  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
37  *    endorse or promote products derived from this software without
38  *    prior written permission. For written permission, please contact
39  *    licensing@OpenSSL.org.
40  *
41  * 5. Products derived from this software may not be called "OpenSSL"
42  *    nor may "OpenSSL" appear in their names without prior written
43  *    permission of the OpenSSL Project.
44  *
45  * 6. Redistributions of any form whatsoever must retain the following
46  *    acknowledgment:
47  *    "This product includes software developed by the OpenSSL Project
48  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
49  *
50  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
51  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
53  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
54  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
56  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
57  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
59  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
60  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
61  * OF THE POSSIBILITY OF SUCH DAMAGE.
62  * ====================================================================
63  *
64  * This product includes cryptographic software written by Eric Young
65  * (eay@cryptsoft.com).  This product includes software written by Tim
66  * Hudson (tjh@cryptsoft.com).
67  *
68  */
69 #ifndef HEADER_ECDH_H
70 # define HEADER_ECDH_H
71 
72 # include <openssl/opensslconf.h>
73 
74 # ifdef OPENSSL_NO_ECDH
75 #  error ECDH is disabled.
76 # endif
77 
78 # include <openssl/ec.h>
79 # include <openssl/ossl_typ.h>
80 # ifndef OPENSSL_NO_DEPRECATED
81 #  include <openssl/bn.h>
82 # endif
83 
84 #ifdef __cplusplus
85 extern "C" {
86 #endif
87 
88 # define EC_FLAG_COFACTOR_ECDH   0x1000
89 
90 const ECDH_METHOD *ECDH_OpenSSL(void);
91 
92 void ECDH_set_default_method(const ECDH_METHOD *);
93 const ECDH_METHOD *ECDH_get_default_method(void);
94 int ECDH_set_method(EC_KEY *, const ECDH_METHOD *);
95 
96 int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
97                      EC_KEY *ecdh, void *(*KDF) (const void *in, size_t inlen,
98                                                  void *out, size_t *outlen));
99 
100 int ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new
101                           *new_func, CRYPTO_EX_dup *dup_func,
102                           CRYPTO_EX_free *free_func);
103 int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg);
104 void *ECDH_get_ex_data(EC_KEY *d, int idx);
105 
106 int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
107                    const unsigned char *Z, size_t Zlen,
108                    const unsigned char *sinfo, size_t sinfolen,
109                    const EVP_MD *md);
110 
111 /* BEGIN ERROR CODES */
112 /*
113  * The following lines are auto generated by the script mkerr.pl. Any changes
114  * made after this point may be overwritten when the script is next run.
115  */
116 void ERR_load_ECDH_strings(void);
117 
118 /* Error codes for the ECDH functions. */
119 
120 /* Function codes. */
121 # define ECDH_F_ECDH_CHECK                                102
122 # define ECDH_F_ECDH_COMPUTE_KEY                          100
123 # define ECDH_F_ECDH_DATA_NEW_METHOD                      101
124 
125 /* Reason codes. */
126 # define ECDH_R_KDF_FAILED                                102
127 # define ECDH_R_NON_FIPS_METHOD                           103
128 # define ECDH_R_NO_PRIVATE_VALUE                          100
129 # define ECDH_R_POINT_ARITHMETIC_FAILURE                  101
130 
131 #ifdef  __cplusplus
132 }
133 #endif
134 #endif
135