Pavol Rusnak
6 years ago
parent
5a304d8e25
commit
fa95f0a037
@ -0,0 +1,130 @@
|
||||
/*
|
||||
* Copyright (c) Pavol Rusnak, SatoshiLabs
|
||||
*
|
||||
* Licensed under TREZOR License
|
||||
* see LICENSE file for details
|
||||
*/
|
||||
|
||||
#include "py/objstr.h"
|
||||
|
||||
#include "chacha20poly1305/rfc7539.h"
|
||||
|
||||
/// class ChaCha20Poly1305:
|
||||
/// '''
|
||||
/// ChaCha20Poly1305 context.
|
||||
/// '''
|
||||
typedef struct _mp_obj_ChaCha20Poly1305_t {
|
||||
mp_obj_base_t base;
|
||||
chacha20poly1305_ctx ctx;
|
||||
int64_t alen, plen;
|
||||
} mp_obj_ChaCha20Poly1305_t;
|
||||
|
||||
/// def __init__(self, key: bytes, nonce: bytes) -> None:
|
||||
/// '''
|
||||
/// Initialize the ChaCha20 + Poly1305 context for encryption or decryption
|
||||
/// using a 32 byte key and 12 byte nonce as in the RFC 7539 style.
|
||||
/// '''
|
||||
STATIC mp_obj_t mod_trezorcrypto_ChaCha20Poly1305_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, 2, 2, false);
|
||||
mp_obj_ChaCha20Poly1305_t *o = m_new_obj(mp_obj_ChaCha20Poly1305_t);
|
||||
o->base.type = type;
|
||||
mp_buffer_info_t key, nonce;
|
||||
mp_get_buffer_raise(args[0], &key, MP_BUFFER_READ);
|
||||
mp_get_buffer_raise(args[1], &nonce, MP_BUFFER_READ);
|
||||
if (key.len != 32) {
|
||||
mp_raise_ValueError("Invalid length of key");
|
||||
}
|
||||
if (nonce.len != 12) {
|
||||
mp_raise_ValueError("Invalid length of nonce");
|
||||
}
|
||||
rfc7539_init(&(o->ctx), key.buf, nonce.buf);
|
||||
o->alen = 0;
|
||||
o->plen = 0;
|
||||
return MP_OBJ_FROM_PTR(o);
|
||||
}
|
||||
|
||||
/// def encrypt(self, data: bytes) -> bytes:
|
||||
/// '''
|
||||
/// Encrypt data (length of data must be divisible by 64 except for the final value).
|
||||
/// '''
|
||||
STATIC mp_obj_t mod_trezorcrypto_ChaCha20Poly1305_encrypt(mp_obj_t self, mp_obj_t data) {
|
||||
mp_obj_ChaCha20Poly1305_t *o = MP_OBJ_TO_PTR(self);
|
||||
mp_buffer_info_t in;
|
||||
mp_get_buffer_raise(data, &in, MP_BUFFER_READ);
|
||||
vstr_t vstr;
|
||||
vstr_init_len(&vstr, in.len);
|
||||
chacha20poly1305_encrypt(&(o->ctx), in.buf, (uint8_t *)vstr.buf, in.len);
|
||||
o->plen += in.len;
|
||||
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_ChaCha20Poly1305_encrypt_obj, mod_trezorcrypto_ChaCha20Poly1305_encrypt);
|
||||
|
||||
/// def decrypt(self, data: bytes) -> bytes:
|
||||
/// '''
|
||||
/// Decrypt data (length of data must be divisible by 64 except for the final value).
|
||||
/// '''
|
||||
STATIC mp_obj_t mod_trezorcrypto_ChaCha20Poly1305_decrypt(mp_obj_t self, mp_obj_t data) {
|
||||
mp_obj_ChaCha20Poly1305_t *o = MP_OBJ_TO_PTR(self);
|
||||
mp_buffer_info_t in;
|
||||
mp_get_buffer_raise(data, &in, MP_BUFFER_READ);
|
||||
vstr_t vstr;
|
||||
vstr_init_len(&vstr, in.len);
|
||||
chacha20poly1305_decrypt(&(o->ctx), in.buf, (uint8_t *)vstr.buf, in.len);
|
||||
o->plen += in.len;
|
||||
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_ChaCha20Poly1305_decrypt_obj, mod_trezorcrypto_ChaCha20Poly1305_decrypt);
|
||||
|
||||
/// def auth(self, data: bytes) -> None:
|
||||
/// '''
|
||||
/// Include authenticated data in the Poly1305 MAC using the RFC 7539
|
||||
/// style with 16 byte padding. This must only be called once and prior
|
||||
/// to encryption or decryption.
|
||||
/// '''
|
||||
STATIC mp_obj_t mod_trezorcrypto_ChaCha20Poly1305_auth(mp_obj_t self, mp_obj_t data) {
|
||||
mp_obj_ChaCha20Poly1305_t *o = MP_OBJ_TO_PTR(self);
|
||||
mp_buffer_info_t in;
|
||||
mp_get_buffer_raise(data, &in, MP_BUFFER_READ);
|
||||
rfc7539_auth(&(o->ctx), in.buf, in.len);
|
||||
o->alen += in.len;
|
||||
return mp_const_none;
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_ChaCha20Poly1305_auth_obj, mod_trezorcrypto_ChaCha20Poly1305_auth);
|
||||
|
||||
/// def finish(self) -> bytes:
|
||||
/// '''
|
||||
/// Compute RFC 7539-style Poly1305 MAC.
|
||||
/// '''
|
||||
STATIC mp_obj_t mod_trezorcrypto_ChaCha20Poly1305_finish(mp_obj_t self) {
|
||||
mp_obj_ChaCha20Poly1305_t *o = MP_OBJ_TO_PTR(self);
|
||||
vstr_t vstr;
|
||||
vstr_init_len(&vstr, 16);
|
||||
rfc7539_finish(&(o->ctx), o->alen, o->plen, (uint8_t *)vstr.buf);
|
||||
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_ChaCha20Poly1305_finish_obj, mod_trezorcrypto_ChaCha20Poly1305_finish);
|
||||
|
||||
STATIC mp_obj_t mod_trezorcrypto_ChaCha20Poly1305___del__(mp_obj_t self) {
|
||||
mp_obj_ChaCha20Poly1305_t *o = MP_OBJ_TO_PTR(self);
|
||||
memset(&(o->ctx), 0, sizeof(chacha20poly1305_ctx));
|
||||
o->alen = 0;
|
||||
o->plen = 0;
|
||||
return mp_const_none;
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_ChaCha20Poly1305___del___obj, mod_trezorcrypto_ChaCha20Poly1305___del__);
|
||||
|
||||
STATIC const mp_rom_map_elem_t mod_trezorcrypto_ChaCha20Poly1305_locals_dict_table[] = {
|
||||
{ MP_ROM_QSTR(MP_QSTR_encrypt), MP_ROM_PTR(&mod_trezorcrypto_ChaCha20Poly1305_encrypt_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_decrypt), MP_ROM_PTR(&mod_trezorcrypto_ChaCha20Poly1305_decrypt_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_auth), MP_ROM_PTR(&mod_trezorcrypto_ChaCha20Poly1305_auth_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_finish), MP_ROM_PTR(&mod_trezorcrypto_ChaCha20Poly1305_finish_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mod_trezorcrypto_ChaCha20Poly1305___del___obj) },
|
||||
};
|
||||
STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_ChaCha20Poly1305_locals_dict, mod_trezorcrypto_ChaCha20Poly1305_locals_dict_table);
|
||||
|
||||
STATIC const mp_obj_type_t mod_trezorcrypto_ChaCha20Poly1305_type = {
|
||||
{ &mp_type_type },
|
||||
.name = MP_QSTR_ChaCha20Poly1305,
|
||||
.make_new = mod_trezorcrypto_ChaCha20Poly1305_make_new,
|
||||
.locals_dict = (void*)&mod_trezorcrypto_ChaCha20Poly1305_locals_dict,
|
||||
};
|
||||
@ -0,0 +1,61 @@
|
||||
from common import *
|
||||
|
||||
from trezor.crypto import chacha20poly1305
|
||||
|
||||
|
||||
class TestCryptoChaCha20Poly1305(unittest.TestCase):
|
||||
|
||||
vectors = [
|
||||
# from https://github.com/wg/c20p1305/blob/master/rfc7539_test.c
|
||||
(
|
||||
'4c616469657320616e642047656e746c656d656e206f662074686520636c617373206f66202739393a204966204920636f756c64206f6666657220796f75206f6e6c79206f6e652074697020666f7220746865206675747572652c2073756e73637265656e20776f756c642062652069742e',
|
||||
'50515253c0c1c2c3c4c5c6c7',
|
||||
'808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9f',
|
||||
'070000004041424344454647',
|
||||
'd31a8d34648e60db7b86afbc53ef7ec2a4aded51296e08fea9e2b5a736ee62d63dbea45e8ca9671282fafb69da92728b1a71de0a9e060b2905d6a5b67ecd3b3692ddbd7f2d778b8c9803aee328091b58fab324e4fad675945585808b4831d7bc3ff4def08e4b7a9de576d26586cec64b6116',
|
||||
'1ae10b594f09e26a7e902ecbd0600691',
|
||||
),
|
||||
# from https://tools.ietf.org/html/rfc7539#appendix-A.5
|
||||
(
|
||||
'496e7465726e65742d4472616674732061726520647261667420646f63756d656e74732076616c696420666f722061206d6178696d756d206f6620736978206d6f6e74687320616e64206d617920626520757064617465642c207265706c616365642c206f72206f62736f6c65746564206279206f7468657220646f63756d656e747320617420616e792074696d652e20497420697320696e617070726f70726961746520746f2075736520496e7465726e65742d447261667473206173207265666572656e6365206d6174657269616c206f7220746f2063697465207468656d206f74686572207468616e206173202fe2809c776f726b20696e2070726f67726573732e2fe2809d',
|
||||
'f33388860000000000004e91',
|
||||
'1c9240a5eb55d38af333888604f6b5f0473917c1402b80099dca5cbc207075c0',
|
||||
'000000000102030405060708',
|
||||
'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',
|
||||
'eead9d67890cbb22392336fea1851f38',
|
||||
),
|
||||
]
|
||||
|
||||
def test_chacha20_encrypt(self):
|
||||
for plaintext, _, key, nonce, ciphertext, _ in self.vectors:
|
||||
ctx = chacha20poly1305(unhexlify(key), unhexlify(nonce))
|
||||
out = ctx.encrypt(unhexlify(plaintext))
|
||||
self.assertEqual(out, unhexlify(ciphertext))
|
||||
|
||||
def test_chacha20_decrypt(self):
|
||||
for plaintext, _, key, nonce, ciphertext, _ in self.vectors:
|
||||
ctx = chacha20poly1305(unhexlify(key), unhexlify(nonce))
|
||||
out = ctx.encrypt(unhexlify(ciphertext))
|
||||
self.assertEqual(out, unhexlify(plaintext))
|
||||
|
||||
def test_chacha20poly1305_encrypt_mac(self):
|
||||
for plaintext, aad, key, nonce, ciphertext, tag in self.vectors:
|
||||
ctx = chacha20poly1305(unhexlify(key), unhexlify(nonce))
|
||||
ctx.auth(unhexlify(aad))
|
||||
out = ctx.encrypt(unhexlify(plaintext))
|
||||
self.assertEqual(out, unhexlify(ciphertext))
|
||||
out = ctx.finish()
|
||||
self.assertEqual(out, unhexlify(tag))
|
||||
|
||||
def test_chacha20poly1305_decrypt_mac(self):
|
||||
for plaintext, aad, key, nonce, ciphertext, tag in self.vectors:
|
||||
ctx = chacha20poly1305(unhexlify(key), unhexlify(nonce))
|
||||
ctx.auth(unhexlify(aad))
|
||||
out = ctx.decrypt(unhexlify(ciphertext))
|
||||
self.assertEqual(out, unhexlify(plaintext))
|
||||
out = ctx.finish()
|
||||
self.assertEqual(out, unhexlify(tag))
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
unittest.main()
|
||||
Loading…
Reference in new issue