mirror of
https://github.com/trezor/trezor-firmware.git
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47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/*
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* Copyright (c) Pavol Rusnak, SatoshiLabs
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*
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* Licensed under Microsoft Reference Source License (Ms-RSL)
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* see LICENSE.md file for details
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*/
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#include "py/objstr.h"
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#include "trezor-crypto/pbkdf2.h"
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// def pbkdf2_hmac(hash_name: str, password: bytes, salt: bytes, iterations: int, dklen:int=None) -> bytes
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STATIC mp_obj_t mod_TrezorCrypto_pbkdf2_hmac(size_t n_args, const mp_obj_t *args) {
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mp_buffer_info_t hash_name;
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mp_get_buffer_raise(args[0], &hash_name, MP_BUFFER_READ);
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mp_buffer_info_t password;
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mp_get_buffer_raise(args[1], &password, MP_BUFFER_READ);
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mp_buffer_info_t salt;
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mp_get_buffer_raise(args[2], &salt, MP_BUFFER_READ);
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mp_int_t iterations = mp_obj_get_int(args[3]);
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mp_int_t dklen = (n_args > 4) ? mp_obj_get_int(args[4]) : 0;
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int digestsize = 0;
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if (hash_name.len == 6 && memcmp(hash_name.buf, "sha256", hash_name.len) == 0) {
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digestsize = 32;
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} else
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if (hash_name.len == 6 && memcmp(hash_name.buf, "sha512", hash_name.len) == 0) {
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digestsize = 64;
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}
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if (digestsize == 0) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid hash_name"));
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}
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if (dklen == 0) {
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dklen = digestsize;
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}
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vstr_t vstr;
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vstr_init_len(&vstr, dklen);
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if (digestsize == 32) {
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pbkdf2_hmac_sha256(password.buf, password.len, salt.buf, salt.len, iterations, (uint8_t *)vstr.buf, dklen, NULL);
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}
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if (digestsize == 64) {
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pbkdf2_hmac_sha512(password.buf, password.len, salt.buf, salt.len, iterations, (uint8_t *)vstr.buf, dklen, NULL);
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}
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return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_TrezorCrypto_pbkdf2_hmac_obj, 4, 5, mod_TrezorCrypto_pbkdf2_hmac);
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