mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-22 23:48:12 +00:00
239 lines
8.4 KiB
C
239 lines
8.4 KiB
C
/*
|
|
* This file is part of the Trezor project, https://trezor.io/
|
|
*
|
|
* Copyright (C) 2018 Pavol Rusnak <stick@satoshilabs.com>
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
void fsm_msgCipherKeyValue(const CipherKeyValue *msg) {
|
|
CHECK_INITIALIZED
|
|
|
|
CHECK_PARAM(msg->value.size % 16 == 0,
|
|
_("Value length must be a multiple of 16"));
|
|
|
|
CHECK_PIN
|
|
|
|
const HDNode *node = fsm_getDerivedNode(SECP256K1_NAME, msg->address_n,
|
|
msg->address_n_count, NULL);
|
|
if (!node) return;
|
|
|
|
bool encrypt = msg->has_encrypt && msg->encrypt;
|
|
bool ask_on_encrypt = msg->has_ask_on_encrypt && msg->ask_on_encrypt;
|
|
bool ask_on_decrypt = msg->has_ask_on_decrypt && msg->ask_on_decrypt;
|
|
if ((encrypt && ask_on_encrypt) || (!encrypt && ask_on_decrypt)) {
|
|
layoutCipherKeyValue(encrypt, msg->key);
|
|
if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
|
|
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
|
|
layoutHome();
|
|
return;
|
|
}
|
|
}
|
|
|
|
uint8_t data[256 + 4];
|
|
strlcpy((char *)data, msg->key, sizeof(data));
|
|
strlcat((char *)data, ask_on_encrypt ? "E1" : "E0", sizeof(data));
|
|
strlcat((char *)data, ask_on_decrypt ? "D1" : "D0", sizeof(data));
|
|
|
|
hmac_sha512(node->private_key, 32, data, strlen((char *)data), data);
|
|
|
|
if (msg->iv.size == 16) {
|
|
// override iv if provided
|
|
memcpy(data + 32, msg->iv.bytes, 16);
|
|
}
|
|
|
|
RESP_INIT(CipheredKeyValue);
|
|
if (encrypt) {
|
|
aes_encrypt_ctx ctx;
|
|
aes_encrypt_key256(data, &ctx);
|
|
aes_cbc_encrypt(msg->value.bytes, resp->value.bytes, msg->value.size,
|
|
data + 32, &ctx);
|
|
} else {
|
|
aes_decrypt_ctx ctx;
|
|
aes_decrypt_key256(data, &ctx);
|
|
aes_cbc_decrypt(msg->value.bytes, resp->value.bytes, msg->value.size,
|
|
data + 32, &ctx);
|
|
}
|
|
resp->value.size = msg->value.size;
|
|
msg_write(MessageType_MessageType_CipheredKeyValue, resp);
|
|
layoutHome();
|
|
}
|
|
|
|
void fsm_msgSignIdentity(const SignIdentity *msg) {
|
|
RESP_INIT(SignedIdentity);
|
|
|
|
CHECK_INITIALIZED
|
|
|
|
CHECK_PIN
|
|
|
|
layoutSignIdentity(&(msg->identity),
|
|
msg->has_challenge_visual ? msg->challenge_visual : 0);
|
|
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
|
|
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
|
|
layoutHome();
|
|
return;
|
|
}
|
|
|
|
uint8_t hash[32];
|
|
if (cryptoIdentityFingerprint(&(msg->identity), hash) == 0) {
|
|
fsm_sendFailure(FailureType_Failure_DataError, _("Invalid identity"));
|
|
layoutHome();
|
|
return;
|
|
}
|
|
|
|
uint32_t address_n[5];
|
|
address_n[0] = PATH_HARDENED | 13;
|
|
address_n[1] = PATH_HARDENED | hash[0] | (hash[1] << 8) | (hash[2] << 16) |
|
|
((uint32_t)hash[3] << 24);
|
|
address_n[2] = PATH_HARDENED | hash[4] | (hash[5] << 8) | (hash[6] << 16) |
|
|
((uint32_t)hash[7] << 24);
|
|
address_n[3] = PATH_HARDENED | hash[8] | (hash[9] << 8) | (hash[10] << 16) |
|
|
((uint32_t)hash[11] << 24);
|
|
address_n[4] = PATH_HARDENED | hash[12] | (hash[13] << 8) | (hash[14] << 16) |
|
|
((uint32_t)hash[15] << 24);
|
|
|
|
const char *curve = SECP256K1_NAME;
|
|
if (msg->has_ecdsa_curve_name) {
|
|
curve = msg->ecdsa_curve_name;
|
|
}
|
|
HDNode *node = fsm_getDerivedNode(curve, address_n, 5, NULL);
|
|
if (!node) return;
|
|
|
|
bool sign_ssh =
|
|
msg->identity.has_proto && (strcmp(msg->identity.proto, "ssh") == 0);
|
|
bool sign_gpg =
|
|
msg->identity.has_proto && (strcmp(msg->identity.proto, "gpg") == 0);
|
|
bool sign_signify =
|
|
msg->identity.has_proto && (strcmp(msg->identity.proto, "signify") == 0);
|
|
|
|
int result = 0;
|
|
layoutProgressSwipe(_("Signing"), 0);
|
|
if (sign_ssh) { // SSH does not sign visual challenge
|
|
result = sshMessageSign(node, msg->challenge_hidden.bytes,
|
|
msg->challenge_hidden.size, resp->signature.bytes);
|
|
} else if (sign_gpg) { // GPG should sign a message digest
|
|
result = gpgMessageSign(node, msg->challenge_hidden.bytes,
|
|
msg->challenge_hidden.size, resp->signature.bytes);
|
|
} else if (sign_signify) { // Signify should sign a message digest
|
|
result =
|
|
signifyMessageSign(node, msg->challenge_hidden.bytes,
|
|
msg->challenge_hidden.size, resp->signature.bytes);
|
|
} else {
|
|
uint8_t digest[64];
|
|
sha256_Raw(msg->challenge_hidden.bytes, msg->challenge_hidden.size, digest);
|
|
sha256_Raw((const uint8_t *)msg->challenge_visual,
|
|
strlen(msg->challenge_visual), digest + 32);
|
|
result = cryptoMessageSign(&(coins[0]), node, InputScriptType_SPENDADDRESS,
|
|
false, digest, 64, resp->signature.bytes);
|
|
}
|
|
|
|
if (result == 0) {
|
|
if (hdnode_fill_public_key(node) != 0) {
|
|
fsm_sendFailure(FailureType_Failure_ProcessError,
|
|
_("Failed to derive public key"));
|
|
layoutHome();
|
|
return;
|
|
}
|
|
|
|
if (strcmp(curve, SECP256K1_NAME) != 0) {
|
|
resp->has_address = false;
|
|
} else {
|
|
resp->has_address = true;
|
|
// hardcoded Bitcoin address type
|
|
if (hdnode_get_address(node, 0x00, resp->address,
|
|
sizeof(resp->address)) != 0) {
|
|
fsm_sendFailure(FailureType_Failure_ProcessError,
|
|
_("Failed to get address"));
|
|
layoutHome();
|
|
return;
|
|
}
|
|
}
|
|
resp->public_key.size = 33;
|
|
// For ed25519, the public key has the prefix 0x00, as specified by SLIP-10.
|
|
// However, since this prefix is non-standard, it may be removed in the
|
|
// future.
|
|
memcpy(resp->public_key.bytes, node->public_key, 33);
|
|
resp->signature.size = 65;
|
|
msg_write(MessageType_MessageType_SignedIdentity, resp);
|
|
} else {
|
|
fsm_sendFailure(FailureType_Failure_ProcessError,
|
|
_("Error signing identity"));
|
|
}
|
|
layoutHome();
|
|
}
|
|
|
|
void fsm_msgGetECDHSessionKey(const GetECDHSessionKey *msg) {
|
|
RESP_INIT(ECDHSessionKey);
|
|
|
|
CHECK_INITIALIZED
|
|
|
|
CHECK_PIN
|
|
|
|
layoutDecryptIdentity(&msg->identity);
|
|
if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
|
|
fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
|
|
layoutHome();
|
|
return;
|
|
}
|
|
|
|
uint8_t hash[32];
|
|
if (cryptoIdentityFingerprint(&(msg->identity), hash) == 0) {
|
|
fsm_sendFailure(FailureType_Failure_DataError, _("Invalid identity"));
|
|
layoutHome();
|
|
return;
|
|
}
|
|
|
|
uint32_t address_n[5];
|
|
address_n[0] = PATH_HARDENED | 17;
|
|
address_n[1] = PATH_HARDENED | hash[0] | (hash[1] << 8) | (hash[2] << 16) |
|
|
((uint32_t)hash[3] << 24);
|
|
address_n[2] = PATH_HARDENED | hash[4] | (hash[5] << 8) | (hash[6] << 16) |
|
|
((uint32_t)hash[7] << 24);
|
|
address_n[3] = PATH_HARDENED | hash[8] | (hash[9] << 8) | (hash[10] << 16) |
|
|
((uint32_t)hash[11] << 24);
|
|
address_n[4] = PATH_HARDENED | hash[12] | (hash[13] << 8) | (hash[14] << 16) |
|
|
((uint32_t)hash[15] << 24);
|
|
|
|
const char *curve = SECP256K1_NAME;
|
|
if (msg->has_ecdsa_curve_name) {
|
|
curve = msg->ecdsa_curve_name;
|
|
}
|
|
|
|
HDNode *node = fsm_getDerivedNode(curve, address_n, 5, NULL);
|
|
if (!node) return;
|
|
|
|
int result_size = 0;
|
|
if (hdnode_get_shared_key(node, msg->peer_public_key.bytes,
|
|
resp->session_key.bytes, &result_size) == 0) {
|
|
resp->session_key.size = result_size;
|
|
if (hdnode_fill_public_key(node) != 0) {
|
|
fsm_sendFailure(FailureType_Failure_ProcessError,
|
|
_("Failed to derive public key"));
|
|
layoutHome();
|
|
return;
|
|
}
|
|
// For curve25519, the public key has the prefix 0x00, as specified by
|
|
// SLIP-10. However, since this prefix is non-standard, it may be removed in
|
|
// the future.
|
|
memcpy(resp->public_key.bytes, node->public_key, 33);
|
|
resp->public_key.size = 33;
|
|
resp->has_public_key = true;
|
|
msg_write(MessageType_MessageType_ECDHSessionKey, resp);
|
|
} else {
|
|
fsm_sendFailure(FailureType_Failure_ProcessError,
|
|
_("Error getting ECDH session key"));
|
|
}
|
|
layoutHome();
|
|
}
|