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trezor-firmware/micropython/extmod/modtrezorcrypto/modtrezorcrypto-ripemd160.h
2017-06-14 17:40:50 +02:00

92 lines
3.3 KiB
C

/*
* Copyright (c) Pavol Rusnak, SatoshiLabs
*
* Licensed under TREZOR License
* see LICENSE file for details
*/
#include "py/objstr.h"
#include "trezor-crypto/ripemd160.h"
/// class Ripemd160:
/// '''
/// RIPEMD160 context.
/// '''
typedef struct _mp_obj_Ripemd160_t {
mp_obj_base_t base;
RIPEMD160_CTX ctx;
} mp_obj_Ripemd160_t;
STATIC mp_obj_t mod_TrezorCrypto_Ripemd160_update(mp_obj_t self, mp_obj_t data);
/// def __init__(self, data: bytes = None) -> None:
/// '''
/// Creates a hash context object.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_Ripemd160_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, 1, false);
mp_obj_Ripemd160_t *o = m_new_obj(mp_obj_Ripemd160_t);
o->base.type = type;
ripemd160_Init(&(o->ctx));
// constructor called with bytes/str as first parameter
if (n_args == 1) {
mod_TrezorCrypto_Ripemd160_update(MP_OBJ_FROM_PTR(o), args[0]);
}
return MP_OBJ_FROM_PTR(o);
}
/// def update(self, data: bytes) -> None:
/// '''
/// Update the hash context with hashed data.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_Ripemd160_update(mp_obj_t self, mp_obj_t data) {
mp_obj_Ripemd160_t *o = MP_OBJ_TO_PTR(self);
mp_buffer_info_t msg;
mp_get_buffer_raise(data, &msg, MP_BUFFER_READ);
if (msg.len > 0) {
ripemd160_Update(&(o->ctx), msg.buf, msg.len);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_Ripemd160_update_obj, mod_TrezorCrypto_Ripemd160_update);
/// def digest(self) -> bytes:
/// '''
/// Returns the digest of hashed data.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_Ripemd160_digest(mp_obj_t self) {
mp_obj_Ripemd160_t *o = MP_OBJ_TO_PTR(self);
vstr_t vstr;
vstr_init_len(&vstr, RIPEMD160_DIGEST_LENGTH);
RIPEMD160_CTX ctx;
memcpy(&ctx, &(o->ctx), sizeof(RIPEMD160_CTX));
ripemd160_Final(&ctx, (uint8_t *)vstr.buf);
memset(&ctx, 0, sizeof(RIPEMD160_CTX));
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_TrezorCrypto_Ripemd160_digest_obj, mod_TrezorCrypto_Ripemd160_digest);
STATIC mp_obj_t mod_TrezorCrypto_Ripemd160___del__(mp_obj_t self) {
mp_obj_Ripemd160_t *o = MP_OBJ_TO_PTR(self);
memset(&(o->ctx), 0, sizeof(RIPEMD160_CTX));
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_TrezorCrypto_Ripemd160___del___obj, mod_TrezorCrypto_Ripemd160___del__);
STATIC const mp_rom_map_elem_t mod_TrezorCrypto_Ripemd160_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_update), MP_ROM_PTR(&mod_TrezorCrypto_Ripemd160_update_obj) },
{ MP_ROM_QSTR(MP_QSTR_digest), MP_ROM_PTR(&mod_TrezorCrypto_Ripemd160_digest_obj) },
{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mod_TrezorCrypto_Ripemd160___del___obj) },
{ MP_ROM_QSTR(MP_QSTR_block_size), MP_OBJ_NEW_SMALL_INT(RIPEMD160_BLOCK_LENGTH) },
{ MP_ROM_QSTR(MP_QSTR_digest_size), MP_OBJ_NEW_SMALL_INT(RIPEMD160_DIGEST_LENGTH) },
};
STATIC MP_DEFINE_CONST_DICT(mod_TrezorCrypto_Ripemd160_locals_dict, mod_TrezorCrypto_Ripemd160_locals_dict_table);
STATIC const mp_obj_type_t mod_TrezorCrypto_Ripemd160_type = {
{ &mp_type_type },
.name = MP_QSTR_Ripemd160,
.make_new = mod_TrezorCrypto_Ripemd160_make_new,
.locals_dict = (void*)&mod_TrezorCrypto_Ripemd160_locals_dict,
};