1 /* 2 * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 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 8 */ 9 10 /* Internal EC functions for other submodules: not for application use */ 11 12 #ifndef OSSL_CRYPTO_ECX_H 13 # define OSSL_CRYPTO_ECX_H 14 # pragma once 15 16 # include <openssl/opensslconf.h> 17 18 # ifndef OPENSSL_NO_EC 19 20 # include <openssl/core.h> 21 # include <openssl/e_os2.h> 22 # include <openssl/crypto.h> 23 # include "internal/refcount.h" 24 # include "crypto/types.h" 25 26 # define X25519_KEYLEN 32 27 # define X448_KEYLEN 56 28 # define ED25519_KEYLEN 32 29 # define ED448_KEYLEN 57 30 31 # define MAX_KEYLEN ED448_KEYLEN 32 33 # define X25519_BITS 253 34 # define X25519_SECURITY_BITS 128 35 36 # define X448_BITS 448 37 # define X448_SECURITY_BITS 224 38 39 # define ED25519_BITS 256 40 /* RFC8032 Section 8.5 */ 41 # define ED25519_SECURITY_BITS 128 42 # define ED25519_SIGSIZE 64 43 44 # define ED448_BITS 456 45 /* RFC8032 Section 8.5 */ 46 # define ED448_SECURITY_BITS 224 47 # define ED448_SIGSIZE 114 48 49 50 typedef enum { 51 ECX_KEY_TYPE_X25519, 52 ECX_KEY_TYPE_X448, 53 ECX_KEY_TYPE_ED25519, 54 ECX_KEY_TYPE_ED448 55 } ECX_KEY_TYPE; 56 57 #define KEYTYPE2NID(type) \ 58 ((type) == ECX_KEY_TYPE_X25519 \ 59 ? EVP_PKEY_X25519 \ 60 : ((type) == ECX_KEY_TYPE_X448 \ 61 ? EVP_PKEY_X448 \ 62 : ((type) == ECX_KEY_TYPE_ED25519 \ 63 ? EVP_PKEY_ED25519 \ 64 : EVP_PKEY_ED448))) 65 66 struct ecx_key_st { 67 OSSL_LIB_CTX *libctx; 68 char *propq; 69 unsigned int haspubkey:1; 70 unsigned char pubkey[MAX_KEYLEN]; 71 unsigned char *privkey; 72 size_t keylen; 73 ECX_KEY_TYPE type; 74 CRYPTO_REF_COUNT references; 75 CRYPTO_RWLOCK *lock; 76 }; 77 78 size_t ossl_ecx_key_length(ECX_KEY_TYPE type); 79 ECX_KEY *ossl_ecx_key_new(OSSL_LIB_CTX *libctx, ECX_KEY_TYPE type, 80 int haspubkey, const char *propq); 81 void ossl_ecx_key_set0_libctx(ECX_KEY *key, OSSL_LIB_CTX *libctx); 82 unsigned char *ossl_ecx_key_allocate_privkey(ECX_KEY *key); 83 void ossl_ecx_key_free(ECX_KEY *key); 84 int ossl_ecx_key_up_ref(ECX_KEY *key); 85 ECX_KEY *ossl_ecx_key_dup(const ECX_KEY *key, int selection); 86 87 int ossl_x25519(uint8_t out_shared_key[32], const uint8_t private_key[32], 88 const uint8_t peer_public_value[32]); 89 void ossl_x25519_public_from_private(uint8_t out_public_value[32], 90 const uint8_t private_key[32]); 91 92 int 93 ossl_ed25519_public_from_private(OSSL_LIB_CTX *ctx, uint8_t out_public_key[32], 94 const uint8_t private_key[32], 95 const char *propq); 96 int 97 ossl_ed25519_sign(uint8_t *out_sig, const uint8_t *message, size_t message_len, 98 const uint8_t public_key[32], const uint8_t private_key[32], 99 OSSL_LIB_CTX *libctx, const char *propq); 100 int 101 ossl_ed25519_verify(const uint8_t *message, size_t message_len, 102 const uint8_t signature[64], const uint8_t public_key[32], 103 OSSL_LIB_CTX *libctx, const char *propq); 104 105 int 106 ossl_ed448_public_from_private(OSSL_LIB_CTX *ctx, uint8_t out_public_key[57], 107 const uint8_t private_key[57], const char *propq); 108 int 109 ossl_ed448_sign(OSSL_LIB_CTX *ctx, uint8_t *out_sig, const uint8_t *message, 110 size_t message_len, const uint8_t public_key[57], 111 const uint8_t private_key[57], const uint8_t *context, 112 size_t context_len, const char *propq); 113 114 int 115 ossl_ed448_verify(OSSL_LIB_CTX *ctx, const uint8_t *message, size_t message_len, 116 const uint8_t signature[114], const uint8_t public_key[57], 117 const uint8_t *context, size_t context_len, const char *propq); 118 119 int 120 ossl_x448(uint8_t out_shared_key[56], const uint8_t private_key[56], 121 const uint8_t peer_public_value[56]); 122 void 123 ossl_x448_public_from_private(uint8_t out_public_value[56], 124 const uint8_t private_key[56]); 125 126 127 /* Backend support */ 128 typedef enum { 129 KEY_OP_PUBLIC, 130 KEY_OP_PRIVATE, 131 KEY_OP_KEYGEN 132 } ecx_key_op_t; 133 134 ECX_KEY *ossl_ecx_key_op(const X509_ALGOR *palg, 135 const unsigned char *p, int plen, 136 int pkey_id, ecx_key_op_t op, 137 OSSL_LIB_CTX *libctx, const char *propq); 138 139 int ossl_ecx_public_from_private(ECX_KEY *key); 140 int ossl_ecx_key_fromdata(ECX_KEY *ecx, const OSSL_PARAM params[], 141 int include_private); 142 ECX_KEY *ossl_ecx_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO *p8inf, 143 OSSL_LIB_CTX *libctx, const char *propq); 144 145 ECX_KEY *ossl_evp_pkey_get1_X25519(EVP_PKEY *pkey); 146 ECX_KEY *ossl_evp_pkey_get1_X448(EVP_PKEY *pkey); 147 ECX_KEY *ossl_evp_pkey_get1_ED25519(EVP_PKEY *pkey); 148 ECX_KEY *ossl_evp_pkey_get1_ED448(EVP_PKEY *pkey); 149 # endif /* OPENSSL_NO_EC */ 150 #endif 151