mirror of
https://github.com/liquidraver/ZephCore.git
synced 2026-09-02 21:43:55 +00:00
131 lines
3.3 KiB
C++
131 lines
3.3 KiB
C++
/*
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* SPDX-License-Identifier: Apache-2.0
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* ZephCore Identity - Ed25519 sign/verify
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*/
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#include <mesh/Identity.h>
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#include <string.h>
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#define ED25519_NO_SEED 1
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#include <ed_25519.h>
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namespace mesh {
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Identity::Identity()
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{
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memset(pub_key, 0, sizeof(pub_key));
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}
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Identity::Identity(const char *pub_hex)
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{
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Utils::fromHex(pub_key, PUB_KEY_SIZE, pub_hex);
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}
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bool Identity::verify(const uint8_t *sig, const uint8_t *message, int msg_len) const
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{
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return ed25519_verify(sig, message, (size_t)msg_len, pub_key) == 1;
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}
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bool Identity::readFrom(const uint8_t *src, size_t len)
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{
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if (len < PUB_KEY_SIZE) return false;
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memcpy(pub_key, src, PUB_KEY_SIZE);
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return true;
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}
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bool Identity::writeTo(uint8_t *dest, size_t max_len) const
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{
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if (max_len < PUB_KEY_SIZE) return false;
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memcpy(dest, pub_key, PUB_KEY_SIZE);
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return true;
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}
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LocalIdentity::LocalIdentity()
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{
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memset(prv_key, 0, sizeof(prv_key));
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}
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LocalIdentity::LocalIdentity(const char *prv_hex, const char *pub_hex) : Identity(pub_hex)
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{
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Utils::fromHex(prv_key, PRV_KEY_SIZE, prv_hex);
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}
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LocalIdentity::LocalIdentity(RNG *rng)
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{
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uint8_t seed[SEED_SIZE];
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rng->random(seed, SEED_SIZE);
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ed25519_create_keypair(pub_key, prv_key, seed);
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}
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bool LocalIdentity::validatePrivateKey(const uint8_t prv[64])
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{
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uint8_t pub[32];
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ed25519_derive_pub(pub, prv);
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if (pub[0] == 0x00 || pub[0] == 0xFF) return false;
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const uint8_t test_client_prv[64] = {
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0x70, 0x65, 0xe1, 0x8f, 0xd9, 0xfa, 0xbb, 0x70,
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0xc1, 0xed, 0x90, 0xdc, 0xa1, 0x99, 0x07, 0xde,
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0x69, 0x8c, 0x88, 0xb7, 0x09, 0xea, 0x14, 0x6e,
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0xaf, 0xd9, 0x3d, 0x9b, 0x83, 0x0c, 0x7b, 0x60,
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0xc4, 0x68, 0x11, 0x93, 0xc7, 0x9b, 0xbc, 0x39,
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0x94, 0x5b, 0xa8, 0x06, 0x41, 0x04, 0xbb, 0x61,
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0x8f, 0x8f, 0xd7, 0xa8, 0x4a, 0x0a, 0xf6, 0xf5,
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0x70, 0x33, 0xd6, 0xe8, 0xdd, 0xcd, 0x64, 0x71
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};
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const uint8_t test_client_pub[32] = {
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0x1e, 0xc7, 0x71, 0x75, 0xb0, 0x91, 0x8e, 0xd2,
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0x06, 0xf9, 0xae, 0x04, 0xec, 0x13, 0x6d, 0x6d,
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0x5d, 0x43, 0x15, 0xbb, 0x26, 0x30, 0x54, 0x27,
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0xf6, 0x45, 0xb4, 0x92, 0xe9, 0x35, 0x0c, 0x10
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};
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uint8_t ss1[32], ss2[32];
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ed25519_key_exchange(ss1, test_client_pub, prv);
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ed25519_key_exchange(ss2, pub, test_client_prv);
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if (memcmp(ss1, ss2, 32) != 0) return false;
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for (int i = 0; i < 32; i++) {
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if (ss1[i] != 0) return true;
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}
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return false;
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}
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bool LocalIdentity::readFrom(const uint8_t *src, size_t len)
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{
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if (len == PRV_KEY_SIZE + PUB_KEY_SIZE) {
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memcpy(prv_key, src, PRV_KEY_SIZE);
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memcpy(pub_key, src + PRV_KEY_SIZE, PUB_KEY_SIZE);
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return true;
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}
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if (len == PRV_KEY_SIZE) {
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memcpy(prv_key, src, PRV_KEY_SIZE);
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ed25519_derive_pub(pub_key, prv_key);
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return true;
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}
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return false;
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}
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size_t LocalIdentity::writeTo(uint8_t *dest, size_t max_len) const
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{
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if (max_len < PRV_KEY_SIZE) return 0;
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if (max_len < PRV_KEY_SIZE + PUB_KEY_SIZE) {
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memcpy(dest, prv_key, PRV_KEY_SIZE);
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return PRV_KEY_SIZE;
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}
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memcpy(dest, prv_key, PRV_KEY_SIZE);
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memcpy(dest + PRV_KEY_SIZE, pub_key, PUB_KEY_SIZE);
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return PRV_KEY_SIZE + PUB_KEY_SIZE;
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}
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void LocalIdentity::sign(uint8_t *sig, const uint8_t *message, int msg_len) const
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{
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ed25519_sign(sig, message, (size_t)msg_len, pub_key, prv_key);
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}
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void LocalIdentity::calcSharedSecret(uint8_t *secret, const uint8_t *other_pub_key) const
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{
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ed25519_key_exchange(secret, other_pub_key, prv_key);
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}
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} /* namespace mesh */
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