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1 | /* TODO */ |
2 | /* crypto/ec/ec.h */ | |
3 | /* ==================================================================== | |
4 | * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. | |
6cc5e19d | 5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
6cc5e19d | 9 | * |
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10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. | |
6cc5e19d | 12 | * |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in | |
15 | * the documentation and/or other materials provided with the | |
16 | * distribution. | |
6cc5e19d | 17 | * |
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18 | * 3. All advertising materials mentioning features or use of this |
19 | * software must display the following acknowledgment: | |
20 | * "This product includes software developed by the OpenSSL Project | |
21 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
22 | * | |
23 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
24 | * endorse or promote products derived from this software without | |
25 | * prior written permission. For written permission, please contact | |
26 | * openssl-core@openssl.org. | |
27 | * | |
28 | * 5. Products derived from this software may not be called "OpenSSL" | |
29 | * nor may "OpenSSL" appear in their names without prior written | |
30 | * permission of the OpenSSL Project. | |
31 | * | |
32 | * 6. Redistributions of any form whatsoever must retain the following | |
33 | * acknowledgment: | |
34 | * "This product includes software developed by the OpenSSL Project | |
35 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
36 | * | |
37 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
38 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
39 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
40 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
41 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
42 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
43 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
44 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
45 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
46 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
47 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
48 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
49 | * ==================================================================== | |
50 | * | |
51 | * This product includes cryptographic software written by Eric Young | |
52 | * (eay@cryptsoft.com). This product includes software written by Tim | |
53 | * Hudson (tjh@cryptsoft.com). | |
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54 | * |
55 | */ | |
56 | ||
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57 | #ifndef HEADER_EC_H |
58 | #define HEADER_EC_H | |
59 | ||
5acaa495 | 60 | #include <openssl/bn.h> |
6cc5e19d | 61 | |
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62 | #ifdef __cplusplus |
63 | extern "C" { | |
64 | #endif | |
6cc5e19d | 65 | |
6cc5e19d | 66 | |
7d7db13e | 67 | |
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68 | typedef enum { |
69 | POINT_CONVERSION_COMPRESSED = 2, | |
70 | POINT_CONVERSION_UNCOMPRESSED = 4, | |
71 | POINT_CONVERSION_HYBRID = 6 | |
72 | } point_conversion_form_t; | |
73 | ||
74 | ||
75 | typedef struct ec_method_st EC_METHOD; | |
76 | ||
77 | typedef struct ec_group_st | |
78 | /* | |
79 | EC_METHOD *meth; | |
80 | -- field definition | |
81 | -- curve coefficients | |
82 | -- optional generator with associated information (order, cofactor) | |
83 | -- optional Lim/Lee precomputation table | |
84 | */ | |
85 | EC_GROUP; | |
86 | ||
87 | typedef struct ec_point_st EC_POINT; | |
88 | ||
89 | ||
90 | /* EC_METHODs for curves over GF(p). | |
91 | * EC_GFp_simple_method provides the basis for the optimized methods. | |
92 | */ | |
93 | ||
94 | const EC_METHOD *EC_GFp_simple_method(void); | |
95 | const EC_METHOD *EC_GFp_mont_method(void); | |
96 | const EC_METHOD *EC_GFp_recp_method(void); | |
97 | const EC_METHOD *EC_GFp_nist_method(void); | |
98 | ||
99 | ||
100 | EC_GROUP *EC_GROUP_new(const EC_METHOD *); | |
101 | /* We don't have types for field specifications and field elements in general. | |
102 | * Otherwise we would declare | |
7d7db13e | 103 | * int EC_GROUP_set_curve(EC_GROUP *, .....); |
3a12ce01 | 104 | */ |
7d7db13e | 105 | int EC_GROUP_set_curve_GFp(EC_GROUP *, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *); |
3a12ce01 | 106 | void EC_GROUP_free(EC_GROUP *); |
7d7db13e | 107 | int EC_GROUP_copy(EC_GROUP *, const EC_GROUP*); |
3a12ce01 | 108 | |
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109 | /* EC_GROUP_new_GFp() calls EC_GROUP_new() and EC_GROUP_set_GFp() |
110 | * after choosing an appropriate EC_METHOD */ | |
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111 | EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *); |
112 | ||
113 | int EC_GROUP_set_generator(EC_GROUP *, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor); | |
114 | ||
115 | /* TODO: 'get' functions for EC_GROUPs */ | |
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116 | |
117 | ||
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118 | EC_POINT *EC_POINT_new(const EC_GROUP *); |
119 | void EC_POINT_free(EC_POINT *); | |
7d7db13e | 120 | int EC_POINT_copy(EC_POINT *, const EC_POINT *); |
3a12ce01 | 121 | |
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122 | /* TODO: 'set' and 'get' functions for EC_POINTs */ |
123 | ||
5b438e9b | 124 | size_t EC_POINT_point2oct(const EC_GROUP *, const EC_POINT *, point_conversion_form_t form, |
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125 | unsigned char *buf, size_t len, BN_CTX *); |
126 | int EC_POINT_oct2point(const EC_GROUP *, EC_POINT *, | |
127 | const unsigned char *buf, size_t len, BN_CTX *); | |
128 | ||
129 | int EC_POINT_add(const EC_GROUP *, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *); | |
130 | int EC_POINT_dbl(const EC_GROUP *, EC_POINT *r, const EC_POINT *a, BN_CTX *); | |
3a12ce01 | 131 | |
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132 | int EC_POINT_is_at_infinity(const EC_GROUP *, const EC_POINT *); |
133 | int EC_POINT_is_on_curve(const EC_GROUP *, const EC_POINT *, BN_CTX *); | |
fb171e53 | 134 | |
5b438e9b | 135 | int EC_POINT_make_affine(const EC_GROUP *, const EC_POINT *, BN_CTX *); |
fb171e53 | 136 | |
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137 | |
138 | ||
139 | /* TODO: scalar multiplication */ | |
6cc5e19d | 140 | |
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141 | |
142 | ||
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143 | /* BEGIN ERROR CODES */ |
144 | /* The following lines are auto generated by the script mkerr.pl. Any changes | |
145 | * made after this point may be overwritten when the script is next run. | |
146 | */ | |
6cc5e19d | 147 | |
65e81670 | 148 | /* Error codes for the EC functions. */ |
6cc5e19d | 149 | |
65e81670 | 150 | /* Function codes. */ |
6cc5e19d | 151 | |
65e81670 | 152 | /* Reason codes. */ |
6cc5e19d | 153 | |
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154 | #ifdef __cplusplus |
155 | } | |
156 | #endif | |
5acaa495 | 157 | #endif |
65e81670 | 158 |