mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-23 14:58:09 +00:00
389 lines
15 KiB
C
389 lines
15 KiB
C
/*
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* Copyright (c) Jan Pochyla, SatoshiLabs
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*
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* Licensed under TREZOR License
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* see LICENSE file for details
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*/
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#include "py/objstr.h"
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#include "bip32.h"
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#include "curves.h"
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/// class HDNode:
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/// '''
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/// BIP0032 HD node structure.
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/// '''
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typedef struct _mp_obj_HDNode_t {
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mp_obj_base_t base;
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uint32_t fingerprint;
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HDNode hdnode;
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} mp_obj_HDNode_t;
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STATIC const mp_obj_type_t mod_trezorcrypto_HDNode_type;
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#define XPUB_MAXLEN 128
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#define ADDRESS_MAXLEN 36
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/// def __init__(self,
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/// depth: int,
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/// fingerprint: int,
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/// child_num: int,
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/// chain_code: bytes,
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/// private_key: bytes = None,
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/// public_key: bytes = None,
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/// curve_name: str = None) -> None:
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/// '''
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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STATIC const mp_arg_t allowed_args[] = {
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{ MP_QSTR_depth, MP_ARG_REQUIRED | MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_fingerprint, MP_ARG_REQUIRED | MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_child_num, MP_ARG_REQUIRED | MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_chain_code, MP_ARG_REQUIRED | MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_empty_bytes} },
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{ MP_QSTR_private_key, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_empty_bytes} },
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{ MP_QSTR_public_key, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_empty_bytes} },
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{ MP_QSTR_curve_name, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_empty_bytes} },
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};
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mp_arg_val_t vals[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all_kw_array(n_args, n_kw, args, MP_ARRAY_SIZE(allowed_args), allowed_args, vals);
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mp_buffer_info_t chain_code;
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mp_buffer_info_t private_key;
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mp_buffer_info_t public_key;
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mp_buffer_info_t curve_name;
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const mp_int_t depth = vals[0].u_int;
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const mp_int_t fingerprint = vals[1].u_int;
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const mp_int_t child_num = vals[2].u_int;
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mp_get_buffer_raise(vals[3].u_obj, &chain_code, MP_BUFFER_READ);
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mp_get_buffer_raise(vals[4].u_obj, &private_key, MP_BUFFER_READ);
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mp_get_buffer_raise(vals[5].u_obj, &public_key, MP_BUFFER_READ);
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mp_get_buffer_raise(vals[6].u_obj, &curve_name, MP_BUFFER_READ);
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if (NULL == chain_code.buf || 32 != chain_code.len) {
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mp_raise_ValueError("chain_code is invalid");
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}
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if (NULL == public_key.buf && NULL == private_key.buf) {
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mp_raise_ValueError("either public_key or private_key is required");
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}
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if (NULL != private_key.buf && 32 != private_key.len) {
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mp_raise_ValueError("private_key is invalid");
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}
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if (NULL != public_key.buf && 33 != public_key.len) {
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mp_raise_ValueError("public_key is invalid");
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}
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const curve_info *curve = NULL;
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if (NULL == curve_name.buf) {
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curve = get_curve_by_name(SECP256K1_NAME);
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} else {
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curve = get_curve_by_name(curve_name.buf);
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}
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if (NULL == curve) {
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mp_raise_ValueError("curve_name is invalid");
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}
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mp_obj_HDNode_t *o = m_new_obj(mp_obj_HDNode_t);
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o->base.type = type;
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o->fingerprint = (uint32_t)fingerprint;
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o->hdnode.depth = (uint32_t)depth;
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o->hdnode.child_num = (uint32_t)child_num;
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if (NULL != chain_code.buf && 32 == chain_code.len) {
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memcpy(o->hdnode.chain_code, chain_code.buf, 32);
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} else {
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memset(o->hdnode.chain_code, 0, 32);
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}
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if (NULL != private_key.buf && 32 == private_key.len) {
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memcpy(o->hdnode.private_key, private_key.buf, 32);
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} else {
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memset(o->hdnode.private_key, 0, 32);
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}
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if (NULL != public_key.buf && 33 == public_key.len) {
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memcpy(o->hdnode.public_key, public_key.buf, 33);
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} else {
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memset(o->hdnode.public_key, 0, 33);
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}
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o->hdnode.curve = curve;
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return MP_OBJ_FROM_PTR(o);
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}
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/// def derive(self, index: int) -> None:
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/// '''
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/// Derive a BIP0032 child node in place.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_derive(mp_obj_t self, mp_obj_t index) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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uint32_t i = mp_obj_get_int_truncated(index);
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uint32_t fp = hdnode_fingerprint(&o->hdnode);
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if (!hdnode_private_ckd(&o->hdnode, i)) {
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memset(&o->hdnode, 0, sizeof(o->hdnode));
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mp_raise_ValueError("Failed to derive");
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}
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o->fingerprint = fp;
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_HDNode_derive_obj, mod_trezorcrypto_HDNode_derive);
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/// def derive_path(self, path: List[int]) -> None:
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/// '''
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/// Go through a list of indexes and iteratively derive a child node in place.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_derive_path(mp_obj_t self, mp_obj_t path) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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// get path objects and length
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size_t plen;
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mp_obj_t *pitems;
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mp_obj_get_array(path, &plen, &pitems);
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if (plen > 32) {
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mp_raise_ValueError("Path cannot be longer than 32 indexes");
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}
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// convert path to int array
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uint32_t pi;
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uint32_t pints[plen];
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for (pi = 0; pi < plen; pi++) {
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if (!MP_OBJ_IS_INT(pitems[pi])) {
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mp_raise_TypeError("Index has to be int");
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}
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pints[pi] = mp_obj_get_int_truncated(pitems[pi]);
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}
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if (!hdnode_private_ckd_cached(&o->hdnode, pints, plen, &o->fingerprint)) {
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// derivation failed, reset the state and raise
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o->fingerprint = 0;
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memset(&o->hdnode, 0, sizeof(o->hdnode));
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mp_raise_ValueError("Failed to derive path");
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_HDNode_derive_path_obj, mod_trezorcrypto_HDNode_derive_path);
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STATIC mp_obj_t serialize_public_private(mp_obj_t self, bool use_public, uint32_t version) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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vstr_t vstr;
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vstr_init(&vstr, XPUB_MAXLEN);
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int written;
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if (use_public) {
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hdnode_fill_public_key(&o->hdnode);
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written = hdnode_serialize_public(&o->hdnode, o->fingerprint, version, vstr.buf, vstr.alloc);
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} else {
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written = hdnode_serialize_private(&o->hdnode, o->fingerprint, version, vstr.buf, vstr.alloc);
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}
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if (written <= 0) {
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mp_raise_ValueError("Failed to serialize");
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}
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vstr.len = written - 1; // written includes 0 at the end
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return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
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}
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/// def serialize_public(self, version: int) -> str:
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/// '''
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/// Serialize the public info from HD node to base58 string.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_serialize_public(mp_obj_t self, mp_obj_t version) {
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uint32_t ver = mp_obj_get_int_truncated(version);
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return serialize_public_private(self, true, ver);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_HDNode_serialize_public_obj, mod_trezorcrypto_HDNode_serialize_public);
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/// def serialize_private(self, version: int) -> str:
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/// '''
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/// Serialize the private info HD node to base58 string.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_serialize_private(mp_obj_t self, mp_obj_t version) {
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uint32_t ver = mp_obj_get_int_truncated(version);
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return serialize_public_private(self, false, ver);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_HDNode_serialize_private_obj, mod_trezorcrypto_HDNode_serialize_private);
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/// def clone(self) -> HDNode:
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/// '''
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/// Returns a copy of the HD node.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_clone(mp_obj_t self) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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mp_obj_HDNode_t *copy = m_new_obj(mp_obj_HDNode_t);
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copy->base.type = &mod_trezorcrypto_HDNode_type;
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copy->hdnode = o->hdnode;
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copy->fingerprint = o->fingerprint;
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return MP_OBJ_FROM_PTR(copy);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_HDNode_clone_obj, mod_trezorcrypto_HDNode_clone);
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/// def depth(self) -> int:
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/// '''
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/// Returns a depth of the HD node.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_depth(mp_obj_t self) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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return mp_obj_new_int_from_uint(o->hdnode.depth);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_HDNode_depth_obj, mod_trezorcrypto_HDNode_depth);
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/// def fingerprint(self) -> int:
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/// '''
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/// Returns a fingerprint of the HD node (hash of the parent public key).
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_fingerprint(mp_obj_t self) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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return mp_obj_new_int_from_uint(o->fingerprint);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_HDNode_fingerprint_obj, mod_trezorcrypto_HDNode_fingerprint);
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/// def child_num(self) -> int:
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/// '''
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/// Returns a child index of the HD node.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_child_num(mp_obj_t self) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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return mp_obj_new_int_from_uint(o->hdnode.child_num);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_HDNode_child_num_obj, mod_trezorcrypto_HDNode_child_num);
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/// def chain_code(self) -> bytes:
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/// '''
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/// Returns a chain code of the HD node.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_chain_code(mp_obj_t self) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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return mp_obj_new_str_of_type(&mp_type_bytes, o->hdnode.chain_code, sizeof(o->hdnode.chain_code));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_HDNode_chain_code_obj, mod_trezorcrypto_HDNode_chain_code);
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/// def private_key(self) -> bytes:
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/// '''
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/// Returns a private key of the HD node.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_private_key(mp_obj_t self) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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return mp_obj_new_str_of_type(&mp_type_bytes, o->hdnode.private_key, sizeof(o->hdnode.private_key));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_HDNode_private_key_obj, mod_trezorcrypto_HDNode_private_key);
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/// def public_key(self) -> bytes:
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/// '''
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/// Returns a public key of the HD node.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_public_key(mp_obj_t self) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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hdnode_fill_public_key(&o->hdnode);
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return mp_obj_new_str_of_type(&mp_type_bytes, o->hdnode.public_key, sizeof(o->hdnode.public_key));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_HDNode_public_key_obj, mod_trezorcrypto_HDNode_public_key);
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/// def address(self, version: int) -> str:
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/// '''
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/// Compute a base58-encoded address string from the HD node.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_HDNode_address(mp_obj_t self, mp_obj_t version) {
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mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
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uint32_t v = mp_obj_get_int_truncated(version);
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vstr_t vstr;
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vstr_init(&vstr, ADDRESS_MAXLEN);
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hdnode_get_address(&o->hdnode, v, vstr.buf, vstr.alloc);
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vstr.len = strlen(vstr.buf);
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return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_HDNode_address_obj, mod_trezorcrypto_HDNode_address);
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STATIC const mp_rom_map_elem_t mod_trezorcrypto_HDNode_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_derive), MP_ROM_PTR(&mod_trezorcrypto_HDNode_derive_obj) },
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{ MP_ROM_QSTR(MP_QSTR_derive_path), MP_ROM_PTR(&mod_trezorcrypto_HDNode_derive_path_obj) },
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{ MP_ROM_QSTR(MP_QSTR_serialize_private), MP_ROM_PTR(&mod_trezorcrypto_HDNode_serialize_private_obj) },
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{ MP_ROM_QSTR(MP_QSTR_serialize_public), MP_ROM_PTR(&mod_trezorcrypto_HDNode_serialize_public_obj) },
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{ MP_ROM_QSTR(MP_QSTR_clone), MP_ROM_PTR(&mod_trezorcrypto_HDNode_clone_obj) },
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{ MP_ROM_QSTR(MP_QSTR_depth), MP_ROM_PTR(&mod_trezorcrypto_HDNode_depth_obj) },
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{ MP_ROM_QSTR(MP_QSTR_fingerprint), MP_ROM_PTR(&mod_trezorcrypto_HDNode_fingerprint_obj) },
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{ MP_ROM_QSTR(MP_QSTR_child_num), MP_ROM_PTR(&mod_trezorcrypto_HDNode_child_num_obj) },
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{ MP_ROM_QSTR(MP_QSTR_chain_code), MP_ROM_PTR(&mod_trezorcrypto_HDNode_chain_code_obj) },
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{ MP_ROM_QSTR(MP_QSTR_private_key), MP_ROM_PTR(&mod_trezorcrypto_HDNode_private_key_obj) },
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{ MP_ROM_QSTR(MP_QSTR_public_key), MP_ROM_PTR(&mod_trezorcrypto_HDNode_public_key_obj) },
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{ MP_ROM_QSTR(MP_QSTR_address), MP_ROM_PTR(&mod_trezorcrypto_HDNode_address_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_HDNode_locals_dict, mod_trezorcrypto_HDNode_locals_dict_table);
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STATIC const mp_obj_type_t mod_trezorcrypto_HDNode_type = {
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{ &mp_type_type },
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.name = MP_QSTR_HDNode,
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.make_new = mod_trezorcrypto_HDNode_make_new,
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.locals_dict = (void*)&mod_trezorcrypto_HDNode_locals_dict,
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};
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/// def deserialize(self, value: str, version_public: int, version_private: int) -> HDNode:
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/// '''
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/// Construct a BIP0032 HD node from a base58-serialized value.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_bip32_deserialize(mp_obj_t value, mp_obj_t version_public, mp_obj_t version_private) {
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mp_buffer_info_t valueb;
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mp_get_buffer_raise(value, &valueb, MP_BUFFER_READ);
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if (valueb.len == 0) {
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mp_raise_ValueError("Invalid value");
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}
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uint32_t vpub = mp_obj_get_int_truncated(version_public);
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uint32_t vpriv = mp_obj_get_int_truncated(version_private);
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HDNode hdnode;
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uint32_t fingerprint;
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if (hdnode_deserialize(valueb.buf, vpub, vpriv, SECP256K1_NAME, &hdnode, &fingerprint) < 0) {
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mp_raise_ValueError("Failed to deserialize");
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}
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mp_obj_HDNode_t *o = m_new_obj(mp_obj_HDNode_t);
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o->base.type = &mod_trezorcrypto_HDNode_type;
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o->hdnode = hdnode;
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o->fingerprint = fingerprint;
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return MP_OBJ_FROM_PTR(o);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_3(mod_trezorcrypto_bip32_deserialize_obj, mod_trezorcrypto_bip32_deserialize);
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/// def from_seed(seed: bytes, curve_name: str) -> HDNode:
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/// '''
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/// Construct a BIP0032 HD node from a BIP0039 seed value.
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/// '''
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STATIC mp_obj_t mod_trezorcrypto_bip32_from_seed(mp_obj_t seed, mp_obj_t curve_name) {
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mp_buffer_info_t seedb;
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mp_get_buffer_raise(seed, &seedb, MP_BUFFER_READ);
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if (seedb.len == 0) {
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mp_raise_ValueError("Invalid seed");
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}
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mp_buffer_info_t curveb;
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mp_get_buffer_raise(curve_name, &curveb, MP_BUFFER_READ);
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if (curveb.len == 0) {
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mp_raise_ValueError("Invalid curve name");
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}
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HDNode hdnode;
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if (!hdnode_from_seed(seedb.buf, seedb.len, curveb.buf, &hdnode)) {
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mp_raise_ValueError("Failed to derive the root node");
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}
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mp_obj_HDNode_t *o = m_new_obj(mp_obj_HDNode_t);
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o->base.type = &mod_trezorcrypto_HDNode_type;
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o->hdnode = hdnode;
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return MP_OBJ_FROM_PTR(o);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_bip32_from_seed_obj, mod_trezorcrypto_bip32_from_seed);
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STATIC const mp_rom_map_elem_t mod_trezorcrypto_bip32_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_bip32) },
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{ MP_ROM_QSTR(MP_QSTR_HDNode), MP_ROM_PTR(&mod_trezorcrypto_HDNode_type) },
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{ MP_ROM_QSTR(MP_QSTR_deserialize), MP_ROM_PTR(&mod_trezorcrypto_bip32_deserialize_obj) },
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{ MP_ROM_QSTR(MP_QSTR_from_seed), MP_ROM_PTR(&mod_trezorcrypto_bip32_from_seed_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_bip32_globals, mod_trezorcrypto_bip32_globals_table);
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STATIC const mp_obj_module_t mod_trezorcrypto_bip32_module = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t*)&mod_trezorcrypto_bip32_globals,
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};
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