mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-23 07:58:09 +00:00
102 lines
4.3 KiB
C
102 lines
4.3 KiB
C
/*
|
|
* Copyright (c) Pavol Rusnak, SatoshiLabs
|
|
*
|
|
* Licensed under TREZOR License
|
|
* see LICENSE file for details
|
|
*/
|
|
|
|
#include "py/objstr.h"
|
|
|
|
#include "trezor-crypto/ecdsa.h"
|
|
#include "trezor-crypto/secp256k1.h"
|
|
|
|
typedef struct _mp_obj_Secp256k1_t {
|
|
mp_obj_base_t base;
|
|
} mp_obj_Secp256k1_t;
|
|
|
|
STATIC mp_obj_t mod_TrezorCrypto_Secp256k1_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
|
|
mp_arg_check_num(n_args, n_kw, 0, 0, false);
|
|
mp_obj_Secp256k1_t *o = m_new_obj(mp_obj_Secp256k1_t);
|
|
o->base.type = type;
|
|
return MP_OBJ_FROM_PTR(o);
|
|
}
|
|
|
|
/// def trezor.crypto.curve.secp256k1.publickey(secret_key: bytes, compressed: bool=True) -> bytes
|
|
/// '''
|
|
/// Computes public key from secret key.
|
|
/// '''
|
|
STATIC mp_obj_t mod_TrezorCrypto_Secp256k1_publickey(size_t n_args, const mp_obj_t *args) {
|
|
mp_buffer_info_t sk;
|
|
mp_get_buffer_raise(args[1], &sk, MP_BUFFER_READ);
|
|
if (sk.len != 32) {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid length of secret key"));
|
|
}
|
|
bool compressed = n_args < 3 || args[2] == mp_const_true;
|
|
vstr_t vstr;
|
|
if (compressed) {
|
|
vstr_init_len(&vstr, 33);
|
|
ecdsa_get_public_key33(&secp256k1, (const uint8_t *)sk.buf, (uint8_t *)vstr.buf);
|
|
} else {
|
|
vstr_init_len(&vstr, 65);
|
|
ecdsa_get_public_key65(&secp256k1, (const uint8_t *)sk.buf, (uint8_t *)vstr.buf);
|
|
}
|
|
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_TrezorCrypto_Secp256k1_publickey_obj, 2, 3, mod_TrezorCrypto_Secp256k1_publickey);
|
|
|
|
/// def trezor.crypto.curve.secp256k1.sign(secret_key: bytes, message: bytes) -> bytes
|
|
/// '''
|
|
/// Uses secret key to produce the signature of message.
|
|
/// '''
|
|
STATIC mp_obj_t mod_TrezorCrypto_Secp256k1_sign(mp_obj_t self, mp_obj_t secret_key, mp_obj_t message) {
|
|
mp_buffer_info_t sk, msg;
|
|
mp_get_buffer_raise(secret_key, &sk, MP_BUFFER_READ);
|
|
mp_get_buffer_raise(message, &msg, MP_BUFFER_READ);
|
|
if (sk.len != 32) {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid length of secret key"));
|
|
}
|
|
vstr_t vstr;
|
|
vstr_init_len(&vstr, 65);
|
|
uint8_t pby;
|
|
if (0 != ecdsa_sign(&secp256k1, (const uint8_t *)sk.buf, (const uint8_t *)msg.buf, msg.len, (uint8_t *)vstr.buf, &pby)) {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Signing failed"));
|
|
}
|
|
(void)pby;
|
|
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_3(mod_TrezorCrypto_Secp256k1_sign_obj, mod_TrezorCrypto_Secp256k1_sign);
|
|
|
|
/// def trezor.crypto.curve.secp256k1.verify(public_key: bytes, signature: bytes, message: bytes) -> bool
|
|
/// '''
|
|
/// Uses public key to verify the signature of the message
|
|
/// Returns True on success.
|
|
/// '''
|
|
STATIC mp_obj_t mod_TrezorCrypto_Secp256k1_verify(size_t n_args, const mp_obj_t *args) {
|
|
mp_buffer_info_t pk, sig, msg;
|
|
mp_get_buffer_raise(args[1], &pk, MP_BUFFER_READ);
|
|
mp_get_buffer_raise(args[2], &sig, MP_BUFFER_READ);
|
|
mp_get_buffer_raise(args[3], &msg, MP_BUFFER_READ);
|
|
if (pk.len != 33 && pk.len != 65) {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid length of public key"));
|
|
}
|
|
if (sig.len != 65) {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid length of signature"));
|
|
}
|
|
return mp_obj_new_bool(0 == ecdsa_verify(&secp256k1, (const uint8_t *)pk.buf, (const uint8_t *)sig.buf, (const uint8_t *)msg.buf, msg.len));
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_TrezorCrypto_Secp256k1_verify_obj, 4, 4, mod_TrezorCrypto_Secp256k1_verify);
|
|
|
|
STATIC const mp_rom_map_elem_t mod_TrezorCrypto_Secp256k1_locals_dict_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR_publickey), MP_ROM_PTR(&mod_TrezorCrypto_Secp256k1_publickey_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_sign), MP_ROM_PTR(&mod_TrezorCrypto_Secp256k1_sign_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_verify), MP_ROM_PTR(&mod_TrezorCrypto_Secp256k1_verify_obj) },
|
|
};
|
|
STATIC MP_DEFINE_CONST_DICT(mod_TrezorCrypto_Secp256k1_locals_dict, mod_TrezorCrypto_Secp256k1_locals_dict_table);
|
|
|
|
STATIC const mp_obj_type_t mod_TrezorCrypto_Secp256k1_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_Secp256k1,
|
|
.make_new = mod_TrezorCrypto_Secp256k1_make_new,
|
|
.locals_dict = (void*)&mod_TrezorCrypto_Secp256k1_locals_dict,
|
|
};
|