2 * Copyright 2020 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_ECX_H
13 # define OSSL_CRYPTO_ECX_H
14 # include <openssl/opensslconf.h>
16 # ifndef OPENSSL_NO_EC
18 # include <openssl/core.h>
19 # include <openssl/e_os2.h>
20 # include <openssl/crypto.h>
21 # include "internal/refcount.h"
23 # define X25519_KEYLEN 32
24 # define X448_KEYLEN 56
25 # define ED25519_KEYLEN 32
26 # define ED448_KEYLEN 57
28 # define MAX_KEYLEN ED448_KEYLEN
30 # define X25519_BITS 253
31 # define X25519_SECURITY_BITS 128
33 # define X448_BITS 448
34 # define X448_SECURITY_BITS 224
36 # define ED25519_BITS 256
37 /* RFC8032 Section 8.5 */
38 # define ED25519_SECURITY_BITS 128
39 # define ED25519_SIGSIZE 64
41 # define ED448_BITS 456
42 /* RFC8032 Section 8.5 */
43 # define ED448_SECURITY_BITS 224
44 # define ED448_SIGSIZE 114
54 #define KEYTYPE2NID(type) \
55 ((type) == ECX_KEY_TYPE_X25519 \
57 : ((type) == ECX_KEY_TYPE_X448 \
59 : ((type) == ECX_KEY_TYPE_ED25519 \
65 unsigned int haspubkey:1;
66 unsigned char pubkey[MAX_KEYLEN];
67 unsigned char *privkey;
70 CRYPTO_REF_COUNT references;
74 typedef struct ecx_key_st ECX_KEY;
76 size_t ecx_key_length(ECX_KEY_TYPE type);
77 ECX_KEY *ecx_key_new(OPENSSL_CTX *libctx, ECX_KEY_TYPE type, int haspubkey);
78 unsigned char *ecx_key_allocate_privkey(ECX_KEY *key);
79 void ecx_key_free(ECX_KEY *key);
80 int ecx_key_up_ref(ECX_KEY *key);
82 int X25519(uint8_t out_shared_key[32], const uint8_t private_key[32],
83 const uint8_t peer_public_value[32]);
84 void X25519_public_from_private(uint8_t out_public_value[32],
85 const uint8_t private_key[32]);
87 int ED25519_public_from_private(OPENSSL_CTX *ctx, uint8_t out_public_key[32],
88 const uint8_t private_key[32]);
89 int ED25519_sign(uint8_t *out_sig, const uint8_t *message, size_t message_len,
90 const uint8_t public_key[32], const uint8_t private_key[32],
91 OPENSSL_CTX *libctx, const char *propq);
92 int ED25519_verify(const uint8_t *message, size_t message_len,
93 const uint8_t signature[64], const uint8_t public_key[32],
94 OPENSSL_CTX *libctx, const char *propq);
96 int ED448_public_from_private(OPENSSL_CTX *ctx, uint8_t out_public_key[57],
97 const uint8_t private_key[57]);
98 int ED448_sign(OPENSSL_CTX *ctx, uint8_t *out_sig, const uint8_t *message,
99 size_t message_len, const uint8_t public_key[57],
100 const uint8_t private_key[57], const uint8_t *context,
103 int ED448_verify(OPENSSL_CTX *ctx, const uint8_t *message, size_t message_len,
104 const uint8_t signature[114], const uint8_t public_key[57],
105 const uint8_t *context, size_t context_len);
107 int X448(uint8_t out_shared_key[56], const uint8_t private_key[56],
108 const uint8_t peer_public_value[56]);
109 void X448_public_from_private(uint8_t out_public_value[56],
110 const uint8_t private_key[56]);
112 /* Backend support */
113 int ecx_public_from_private(ECX_KEY *key);
114 int ecx_key_fromdata(ECX_KEY *ecx, const OSSL_PARAM params[],
115 int include_private);
117 # endif /* OPENSSL_NO_EC */