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crypto: add bip32

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This commit is contained in:
Jan Pochyla 2016-10-06 14:00:57 +02:00
parent 71793cc6d1
commit 128a4b20b5
2 changed files with 236 additions and 0 deletions
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234
extmod/modtrezorcrypto/modtrezorcrypto-bip32.h Normal file
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/*
* Copyright (c) Jan Pochyla, SatoshiLabs
*
* Licensed under TREZOR License
* see LICENSE file for details
*/
#include "py/objstr.h"
#include "trezor-crypto/bip32.h"
typedef struct _mp_obj_HDNode_t {
mp_obj_base_t base;
uint32_t fingerprint;
HDNode hdnode;
} mp_obj_HDNode_t;
/// def trezor.crypto.HDNode.derive(index: int) -> None:
/// '''
/// Derive a BIP0032 child node in place.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_HDNode_derive(mp_obj_t self, mp_obj_t index) {
mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
uint32_t i = mp_obj_get_int_truncated(index);
uint32_t fp = hdnode_fingerprint(&o->hdnode);
if (!hdnode_private_ckd(&o->hdnode, i)) {
memset(&o->hdnode, 0, sizeof(o->hdnode));
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Failed to derive"));
}
o->fingerprint = fp;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_HDNode_derive_obj, mod_TrezorCrypto_HDNode_derive);
/// def trezor.crypto.HDNode.derive_path(path: list) -> None:
/// '''
/// Go through a list of indexes and iteratively derive a child node in place.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_HDNode_derive_path(mp_obj_t self, mp_obj_t path) {
mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
mp_uint_t plen;
mp_obj_t *pitems;
mp_obj_get_array(path, &plen, &pitems);
for (uint32_t pi = 0; pi < plen; pi++) {
mp_obj_t iobj = pitems[pi];
if (!MP_OBJ_IS_INT(iobj)) {
// some value from the path is not integer, reset the state and raise
o->fingerprint = 0;
memset(&o->hdnode, 0, sizeof(o->hdnode));
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "Index has to be int"));
}
uint32_t i = mp_obj_get_int_truncated(iobj);
if (pi == plen - 1) {
// compute fingerprint before overwriting the node, but only for the nth-1 node
o->fingerprint = hdnode_fingerprint(&o->hdnode);
}
if (!hdnode_private_ckd(&o->hdnode, i)) {
// derivation failed, reset the state and raise
o->fingerprint = 0;
memset(&o->hdnode, 0, sizeof(o->hdnode));
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Failed to derive path"));
}
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_HDNode_derive_path_obj, mod_TrezorCrypto_HDNode_derive_path);
STATIC mp_obj_t serialize_public_private(mp_obj_t self, mp_obj_t version, bool use_public) {
mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
uint32_t ver = mp_obj_get_int_truncated(version);
vstr_t vstr;
vstr_init(&vstr, 120); // maximum length of base58-serialized node
hdnode_fill_public_key(&o->hdnode);
int written = hdnode_serialize(&o->hdnode, o->fingerprint, ver, use_public, vstr.buf, vstr.alloc);
if (written <= 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Failed to serialize"));
}
vstr.len = written - 1; // written includes 0 at the end
return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
}
/// def trezor.crypto.HDNode.serialize_public(version: int) -> str:
/// '''
/// Serialize the public info from HD node to base58 string.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_HDNode_serialize_public(mp_obj_t self, mp_obj_t version) {
return serialize_public_private(self, version, true);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_HDNode_serialize_public_obj, mod_TrezorCrypto_HDNode_serialize_public);
/// def trezor.crypto.HDNode.serialize_private(version: int) -> str:
/// '''
/// Serialize the private info HD node to base58 string.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_HDNode_serialize_private(mp_obj_t self, mp_obj_t version) {
return serialize_public_private(self, version, false);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_HDNode_serialize_private_obj, mod_TrezorCrypto_HDNode_serialize_private);
/// def trezor.crypto.HDNode.depth() -> int:
/// '''
/// Returns a depth of the HD node.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_HDNode_depth(mp_obj_t self) {
mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
return mp_obj_new_int_from_uint(o->hdnode.depth);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_TrezorCrypto_HDNode_depth_obj, mod_TrezorCrypto_HDNode_depth);
/// def trezor.crypto.HDNode.fingerprint() -> int:
/// '''
/// Returns a fingerprint of the HD node (hash of the parent public key).
/// '''
STATIC mp_obj_t mod_TrezorCrypto_HDNode_fingerprint(mp_obj_t self) {
mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
return mp_obj_new_int_from_uint(o->fingerprint);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_TrezorCrypto_HDNode_fingerprint_obj, mod_TrezorCrypto_HDNode_fingerprint);
/// def trezor.crypto.HDNode.child_num() -> int:
/// '''
/// Returns a child index of the HD node.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_HDNode_child_num(mp_obj_t self) {
mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
return mp_obj_new_int_from_uint(o->hdnode.child_num);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_TrezorCrypto_HDNode_child_num_obj, mod_TrezorCrypto_HDNode_child_num);
/// def trezor.crypto.HDNode.chain_code() -> bytes:
/// '''
/// Returns a chain code of the HD node.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_HDNode_chain_code(mp_obj_t self) {
mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
return mp_obj_new_str_of_type(&mp_type_bytes, o->hdnode.chain_code, sizeof(o->hdnode.chain_code));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_TrezorCrypto_HDNode_chain_code_obj, mod_TrezorCrypto_HDNode_chain_code);
/// def trezor.crypto.HDNode.public_key() -> bytes:
/// '''
/// Returns a public key of the HD node.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_HDNode_public_key(mp_obj_t self) {
mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
hdnode_fill_public_key(&o->hdnode);
return mp_obj_new_str_of_type(&mp_type_bytes, o->hdnode.public_key, sizeof(o->hdnode.public_key));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_TrezorCrypto_HDNode_public_key_obj, mod_TrezorCrypto_HDNode_public_key);
/// def trezor.crypto.HDNode.private_key() -> bytes:
/// '''
/// Returns a private key of the HD node.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_HDNode_private_key(mp_obj_t self) {
mp_obj_HDNode_t *o = MP_OBJ_TO_PTR(self);
return mp_obj_new_str_of_type(&mp_type_bytes, o->hdnode.private_key, sizeof(o->hdnode.private_key));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_TrezorCrypto_HDNode_private_key_obj, mod_TrezorCrypto_HDNode_private_key);
STATIC const mp_rom_map_elem_t mod_TrezorCrypto_HDNode_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_derive), MP_ROM_PTR(&mod_TrezorCrypto_HDNode_derive_obj) },
{ MP_ROM_QSTR(MP_QSTR_derive_path), MP_ROM_PTR(&mod_TrezorCrypto_HDNode_derive_path_obj) },
{ MP_ROM_QSTR(MP_QSTR_serialize_private), MP_ROM_PTR(&mod_TrezorCrypto_HDNode_serialize_private_obj) },
{ MP_ROM_QSTR(MP_QSTR_serialize_public), MP_ROM_PTR(&mod_TrezorCrypto_HDNode_serialize_public_obj) },
{ MP_ROM_QSTR(MP_QSTR_depth), MP_ROM_PTR(&mod_TrezorCrypto_HDNode_depth_obj) },
{ MP_ROM_QSTR(MP_QSTR_fingerprint), MP_ROM_PTR(&mod_TrezorCrypto_HDNode_fingerprint_obj) },
{ MP_ROM_QSTR(MP_QSTR_child_num), MP_ROM_PTR(&mod_TrezorCrypto_HDNode_child_num_obj) },
{ MP_ROM_QSTR(MP_QSTR_chain_code), MP_ROM_PTR(&mod_TrezorCrypto_HDNode_chain_code_obj) },
{ MP_ROM_QSTR(MP_QSTR_private_key), MP_ROM_PTR(&mod_TrezorCrypto_HDNode_private_key_obj) },
{ MP_ROM_QSTR(MP_QSTR_public_key), MP_ROM_PTR(&mod_TrezorCrypto_HDNode_public_key_obj) },
};
STATIC MP_DEFINE_CONST_DICT(mod_TrezorCrypto_HDNode_locals_dict, mod_TrezorCrypto_HDNode_locals_dict_table);
STATIC const mp_obj_type_t mod_TrezorCrypto_HDNode_type = {
{ &mp_type_type },
.name = MP_QSTR_HDNode,
.locals_dict = (void*)&mod_TrezorCrypto_HDNode_locals_dict,
};
typedef struct _mp_obj_Bip32_t {
mp_obj_base_t base;
} mp_obj_Bip32_t;
STATIC mp_obj_t mod_TrezorCrypto_Bip32_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_Bip32_t *o = m_new_obj(mp_obj_Bip32_t);
o->base.type = type;
return MP_OBJ_FROM_PTR(o);
}
/// def trezor.crypto.Bip32.from_seed(seed: bytes, curve_name: str) -> HDNode:
/// '''
/// Construct a BIP0032 HD node from a BIP0039 seed value.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_Bip32_from_seed(mp_obj_t self, mp_obj_t seed, mp_obj_t curve_name) {
mp_buffer_info_t seedb;
mp_get_buffer_raise(seed, &seedb, MP_BUFFER_READ);
if (seedb.len == 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid seed"));
}
mp_buffer_info_t curveb;
mp_get_buffer_raise(curve_name, &curveb, MP_BUFFER_READ);
if (curveb.len == 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid curve name"));
}
HDNode hdnode;
if (!hdnode_from_seed(seedb.buf, seedb.len, curveb.buf, &hdnode)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid seed"));
}
mp_obj_HDNode_t *o = m_new_obj(mp_obj_HDNode_t);
o->base.type = &mod_TrezorCrypto_HDNode_type;
o->hdnode = hdnode;
return MP_OBJ_FROM_PTR(o);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(mod_TrezorCrypto_Bip32_from_seed_obj, mod_TrezorCrypto_Bip32_from_seed);
STATIC const mp_rom_map_elem_t mod_TrezorCrypto_Bip32_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_from_seed), MP_ROM_PTR(&mod_TrezorCrypto_Bip32_from_seed_obj) },
};
STATIC MP_DEFINE_CONST_DICT(mod_TrezorCrypto_Bip32_locals_dict, mod_TrezorCrypto_Bip32_locals_dict_table);
STATIC const mp_obj_type_t mod_TrezorCrypto_Bip32_type = {
{ &mp_type_type },
.name = MP_QSTR_Bip32,
.make_new = mod_TrezorCrypto_Bip32_make_new,
.locals_dict = (void*)&mod_TrezorCrypto_Bip32_locals_dict,
};

2
extmod/modtrezorcrypto/modtrezorcrypto.c
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@ -16,6 +16,7 @@
#if MICROPY_PY_TREZORCRYPTO
#include "modtrezorcrypto-aes.h"
#include "modtrezorcrypto-bip32.h"
#include "modtrezorcrypto-bip39.h"
#include "modtrezorcrypto-ed25519.h"
#include "modtrezorcrypto-pbkdf2.h"
@ -32,6 +33,7 @@
STATIC const mp_rom_map_elem_t mp_module_TrezorCrypto_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_TrezorCrypto) },
{ MP_ROM_QSTR(MP_QSTR_AES), MP_ROM_PTR(&mod_TrezorCrypto_AES_type) },
{ MP_ROM_QSTR(MP_QSTR_Bip32), MP_ROM_PTR(&mod_TrezorCrypto_Bip32_type) },
{ MP_ROM_QSTR(MP_QSTR_Bip39), MP_ROM_PTR(&mod_TrezorCrypto_Bip39_type) },
{ MP_ROM_QSTR(MP_QSTR_Ed25519), MP_ROM_PTR(&mod_TrezorCrypto_Ed25519_type) },
{ MP_ROM_QSTR(MP_QSTR_Nist256p1), MP_ROM_PTR(&mod_TrezorCrypto_Nist256p1_type) },