66 lines
2.9 KiB
C
66 lines
2.9 KiB
C
/**
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* Copyright (C) 2018 Juho Vähä-Herttua
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* Copyright (C) 2020 Jaslo Ziska
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*/
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#include "crypto.h"
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#ifndef PAIRING_H
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#define PAIRING_H
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#define PAIRING_SIG_SIZE (2 * X25519_KEY_SIZE)
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#define SRP_USERNAME_SIZE 24 /* accomodates up to an 8-octet MAC address */
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#define SRP_SESSION_KEY_SIZE 40
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#define SRP_VERIFIER_SIZE 256
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#define SRP_SALT_SIZE 16
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#define SRP_PK_SIZE 256
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#define SRP_SHA SRP_SHA1
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#define SRP_NG SRP_NG_2048
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#define SRP_M2_SIZE 64
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#define SRP_PRIVATE_KEY_SIZE 32
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#define GCM_AUTHTAG_SIZE 16
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#define SHA512_KEY_LENGTH 64
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typedef struct pairing_s pairing_t;
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typedef struct pairing_session_s pairing_session_t;
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pairing_t *pairing_init_generate(const char *device_id, const char *keyfile, int *result);
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void pairing_get_public_key(pairing_t *pairing, unsigned char public_key[ED25519_KEY_SIZE]);
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pairing_session_t *pairing_session_init(pairing_t *pairing);
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void pairing_session_set_setup_status(pairing_session_t *session);
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int pairing_session_check_handshake_status(pairing_session_t *session);
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int pairing_session_handshake(pairing_session_t *session, const unsigned char ecdh_key[X25519_KEY_SIZE],
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const unsigned char ed_key[ED25519_KEY_SIZE]);
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int pairing_session_get_public_key(pairing_session_t *session, unsigned char ecdh_key[X25519_KEY_SIZE]);
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int random_pin();
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int pairing_session_get_signature(pairing_session_t *session, unsigned char signature[PAIRING_SIG_SIZE]);
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int pairing_session_finish(pairing_session_t *session, const unsigned char signature[PAIRING_SIG_SIZE]);
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void pairing_session_destroy(pairing_session_t *session);
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void pairing_destroy(pairing_t *pairing);
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int pairing_get_ecdh_secret_key(pairing_session_t *session, unsigned char ecdh_secret[X25519_KEY_SIZE]);
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int srp_new_user(pairing_session_t *session, pairing_t *pairing, const char *device_id, const char *pin,
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const char **salt, int *len_salt, const char **pk, int *len_pk);
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int srp_validate_proof(pairing_session_t *session, pairing_t *pairing, const unsigned char *A,
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int len_A, unsigned char *proof, int client_proof_len, int proof_len);
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int srp_confirm_pair_setup(pairing_session_t *session, pairing_t *pairing, unsigned char *epk,
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unsigned char *auth_tag);
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void access_client_session_data(pairing_session_t *session, char **username, char **client_pk, bool *setup);
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void ed25519_pk_to_base64(const unsigned char *pk, char **pk64);
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#endif
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