2 * Copyright 2020-2021 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_ECX_H
13 # define OSSL_CRYPTO_ECX_H
16 # include <openssl/opensslconf.h>
18 # ifndef OPENSSL_NO_EC
20 # include <openssl/core.h>
21 # include <openssl/e_os2.h>
22 # include <openssl/crypto.h>
23 # include "internal/refcount.h"
25 # define X25519_KEYLEN 32
26 # define X448_KEYLEN 56
27 # define ED25519_KEYLEN 32
28 # define ED448_KEYLEN 57
30 # define MAX_KEYLEN ED448_KEYLEN
32 # define X25519_BITS 253
33 # define X25519_SECURITY_BITS 128
35 # define X448_BITS 448
36 # define X448_SECURITY_BITS 224
38 # define ED25519_BITS 256
39 /* RFC8032 Section 8.5 */
40 # define ED25519_SECURITY_BITS 128
41 # define ED25519_SIGSIZE 64
43 # define ED448_BITS 456
44 /* RFC8032 Section 8.5 */
45 # define ED448_SECURITY_BITS 224
46 # define ED448_SIGSIZE 114
56 #define KEYTYPE2NID(type) \
57 ((type) == ECX_KEY_TYPE_X25519 \
59 : ((type) == ECX_KEY_TYPE_X448 \
61 : ((type) == ECX_KEY_TYPE_ED25519 \
68 unsigned int haspubkey:1;
69 unsigned char pubkey[MAX_KEYLEN];
70 unsigned char *privkey;
73 CRYPTO_REF_COUNT references;
77 typedef struct ecx_key_st ECX_KEY;
79 size_t ecx_key_length(ECX_KEY_TYPE type);
80 ECX_KEY *ecx_key_new(OSSL_LIB_CTX *libctx, ECX_KEY_TYPE type, int haspubkey,
82 void ecx_key_set0_libctx(ECX_KEY *key, OSSL_LIB_CTX *libctx);
83 unsigned char *ecx_key_allocate_privkey(ECX_KEY *key);
84 void ecx_key_free(ECX_KEY *key);
85 int ecx_key_up_ref(ECX_KEY *key);
87 int X25519(uint8_t out_shared_key[32], const uint8_t private_key[32],
88 const uint8_t peer_public_value[32]);
89 void X25519_public_from_private(uint8_t out_public_value[32],
90 const uint8_t private_key[32]);
92 int ED25519_public_from_private(OSSL_LIB_CTX *ctx, uint8_t out_public_key[32],
93 const uint8_t private_key[32], const char *propq);
94 int ED25519_sign(uint8_t *out_sig, const uint8_t *message, size_t message_len,
95 const uint8_t public_key[32], const uint8_t private_key[32],
96 OSSL_LIB_CTX *libctx, const char *propq);
97 int ED25519_verify(const uint8_t *message, size_t message_len,
98 const uint8_t signature[64], const uint8_t public_key[32],
99 OSSL_LIB_CTX *libctx, const char *propq);
101 int ED448_public_from_private(OSSL_LIB_CTX *ctx, uint8_t out_public_key[57],
102 const uint8_t private_key[57], const char *propq);
103 int ED448_sign(OSSL_LIB_CTX *ctx, uint8_t *out_sig, const uint8_t *message,
104 size_t message_len, const uint8_t public_key[57],
105 const uint8_t private_key[57], const uint8_t *context,
106 size_t context_len, const char *propq);
108 int ED448_verify(OSSL_LIB_CTX *ctx, const uint8_t *message, size_t message_len,
109 const uint8_t signature[114], const uint8_t public_key[57],
110 const uint8_t *context, size_t context_len, const char *propq);
112 int X448(uint8_t out_shared_key[56], const uint8_t private_key[56],
113 const uint8_t peer_public_value[56]);
114 void X448_public_from_private(uint8_t out_public_value[56],
115 const uint8_t private_key[56]);
118 /* Backend support */
119 int ecx_public_from_private(ECX_KEY *key);
120 int ecx_key_fromdata(ECX_KEY *ecx, const OSSL_PARAM params[],
121 int include_private);
123 ECX_KEY *evp_pkey_get1_X25519(EVP_PKEY *pkey);
124 ECX_KEY *evp_pkey_get1_X448(EVP_PKEY *pkey);
125 ECX_KEY *evp_pkey_get1_ED25519(EVP_PKEY *pkey);
126 ECX_KEY *evp_pkey_get1_ED448(EVP_PKEY *pkey);
127 # endif /* OPENSSL_NO_EC */