diff --git a/embed/extmod/modtrezorcrypto/modtrezorcrypto-bip32.h b/embed/extmod/modtrezorcrypto/modtrezorcrypto-bip32.h
index 43901bedf..f70f32680 100644
--- a/embed/extmod/modtrezorcrypto/modtrezorcrypto-bip32.h
+++ b/embed/extmod/modtrezorcrypto/modtrezorcrypto-bip32.h
@@ -8,6 +8,7 @@
 #include "py/objstr.h"
 
 #include "trezor-crypto/bip32.h"
+#include "trezor-crypto/curves.h"
 
 /// class HDNode:
 ///     '''
@@ -24,6 +25,91 @@ STATIC const mp_obj_type_t mod_trezorcrypto_HDNode_type;
 #define XPUB_MAXLEN 128
 #define ADDRESS_MAXLEN 36
 
+/// def __init__(self,
+///              depth: int,
+///              fingerprint: int,
+///              child_num: int,
+///              chain_code: bytes,
+///              private_key: bytes = None,
+///              public_key: bytes = None,
+///              curve_name: str = None) -> None:
+///     '''
+///     '''
+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) {
+
+    STATIC const mp_arg_t allowed_args[] = {
+        { MP_QSTR_depth,        MP_ARG_REQUIRED | MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_fingerprint,   MP_ARG_REQUIRED | MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_child_num,    MP_ARG_REQUIRED | MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_chain_code,   MP_ARG_REQUIRED | MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_empty_bytes} },
+        { MP_QSTR_private_key,                    MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_empty_bytes} },
+        { MP_QSTR_public_key,                     MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_empty_bytes} },
+        { MP_QSTR_curve_name,                     MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_empty_bytes} },
+    };
+    mp_arg_val_t vals[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all_kw_array(n_args, n_kw, args, MP_ARRAY_SIZE(allowed_args), allowed_args, vals);
+
+    mp_buffer_info_t chain_code;
+    mp_buffer_info_t private_key;
+    mp_buffer_info_t public_key;
+    mp_buffer_info_t curve_name;
+    const mp_int_t depth      = vals[0].u_int;
+    const mp_int_t fingerprint = vals[1].u_int;
+    const mp_int_t child_num  = vals[2].u_int;
+    mp_get_buffer_raise(vals[3].u_obj, &chain_code, MP_BUFFER_READ);
+    mp_get_buffer_raise(vals[4].u_obj, &private_key, MP_BUFFER_READ);
+    mp_get_buffer_raise(vals[5].u_obj, &public_key, MP_BUFFER_READ);
+    mp_get_buffer_raise(vals[6].u_obj, &curve_name, MP_BUFFER_READ);
+
+    if (NULL == chain_code.buf || 32 != chain_code.len) {
+        mp_raise_ValueError("chain_code is invalid");
+    }
+    if (NULL == public_key.buf && NULL == private_key.buf) {
+        mp_raise_ValueError("either public_key or private_key is required");
+    }
+    if (NULL != private_key.buf && 32 != private_key.len) {
+        mp_raise_ValueError("private_key is invalid");
+    }
+    if (NULL != public_key.buf && 33 != public_key.len) {
+        mp_raise_ValueError("public_key is invalid");
+    }
+
+    const curve_info *curve = NULL;
+    if (NULL == curve_name.buf) {
+        curve = get_curve_by_name(SECP256K1_NAME);
+    } else {
+        curve = get_curve_by_name(curve_name.buf);
+    }
+    if (NULL == curve) {
+        mp_raise_ValueError("curve_name is invalid");
+    }
+
+    mp_obj_HDNode_t *o = m_new_obj(mp_obj_HDNode_t);
+    o->base.type = type;
+
+    o->fingerprint = (uint32_t)fingerprint;
+    o->hdnode.depth = (uint32_t)depth;
+    o->hdnode.child_num = (uint32_t)child_num;
+    if (NULL != chain_code.buf && 32 == chain_code.len) {
+        memcpy(o->hdnode.chain_code, chain_code.buf, 32);
+    } else {
+        memset(o->hdnode.chain_code, 0, 32);
+    }
+    if (NULL != private_key.buf && 32 == private_key.len) {
+        memcpy(o->hdnode.private_key, private_key.buf, 32);
+    } else {
+        memset(o->hdnode.private_key, 0, 32);
+    }
+    if (NULL != public_key.buf && 33 == public_key.len) {
+        memcpy(o->hdnode.public_key, public_key.buf, 33);
+    } else {
+        memset(o->hdnode.public_key, 0, 33);
+    }
+    o->hdnode.curve = curve;
+
+    return MP_OBJ_FROM_PTR(o);
+}
+
 /// def derive(self, index: int) -> None:
 ///     '''
 ///     Derive a BIP0032 child node in place.
@@ -232,6 +318,7 @@ STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_HDNode_locals_dict, mod_trezorcrypt
 STATIC const mp_obj_type_t mod_trezorcrypto_HDNode_type = {
     { &mp_type_type },
     .name = MP_QSTR_HDNode,
+    .make_new = mod_trezorcrypto_HDNode_make_new,
     .locals_dict = (void*)&mod_trezorcrypto_HDNode_locals_dict,
 };