Pavol Rusnak
8 years ago
parent
80be60c3ff
commit
fc05f25255
@ -0,0 +1,141 @@
|
||||
/*
|
||||
* Copyright (c) Pavol Rusnak, SatoshiLabs
|
||||
*
|
||||
* Licensed under TREZOR License
|
||||
* see LICENSE file for details
|
||||
*/
|
||||
|
||||
#include "py/objstr.h"
|
||||
|
||||
#include "trezor-crypto/aes.h"
|
||||
|
||||
/*
|
||||
*/
|
||||
|
||||
typedef struct _mp_obj_AES_t {
|
||||
mp_obj_base_t base;
|
||||
union {
|
||||
aes_encrypt_ctx encrypt_ctx;
|
||||
aes_decrypt_ctx decrypt_ctx;
|
||||
} ctx;
|
||||
mp_int_t mode;
|
||||
uint8_t iv[AES_BLOCK_SIZE];
|
||||
uint8_t ctr[AES_BLOCK_SIZE];
|
||||
} mp_obj_AES_t;
|
||||
|
||||
/// def trezor.crypto.aes.AES(mode:int, key: bytes, iv: bytes=None) -> AES
|
||||
STATIC mp_obj_t mod_TrezorCrypto_AES_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, 3, false);
|
||||
mp_obj_AES_t *o = m_new_obj(mp_obj_AES_t);
|
||||
o->base.type = type;
|
||||
o->mode = mp_obj_get_int(args[0]);
|
||||
if ((o->mode & 0x7F) > 0x04) {
|
||||
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid AES mode"));
|
||||
}
|
||||
mp_buffer_info_t key;
|
||||
mp_get_buffer_raise(args[1], &key, MP_BUFFER_READ);
|
||||
if (key.len != 16 && key.len != 24 && key.len != 32) {
|
||||
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid length of key (has to be 128, 192 or 256 bits)"));
|
||||
}
|
||||
if (n_args > 2) {
|
||||
mp_buffer_info_t iv;
|
||||
mp_get_buffer_raise(args[2], &iv, MP_BUFFER_READ);
|
||||
if (iv.len != AES_BLOCK_SIZE) {
|
||||
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid length of initialization vector (has to be 128 bits)"));
|
||||
}
|
||||
memcpy(o->iv, iv.buf, AES_BLOCK_SIZE);
|
||||
} else {
|
||||
memset(o->iv, 0, AES_BLOCK_SIZE);
|
||||
}
|
||||
memset(o->ctr, 0, AES_BLOCK_SIZE);
|
||||
switch (key.len) {
|
||||
case 16:
|
||||
if ((o->mode & 0x80) == 0x00) {
|
||||
aes_encrypt_key128(key.buf, &(o->ctx.encrypt_ctx));
|
||||
} else {
|
||||
aes_decrypt_key128(key.buf, &(o->ctx.decrypt_ctx));
|
||||
}
|
||||
break;
|
||||
case 24:
|
||||
if ((o->mode & 0x80) == 0x00) {
|
||||
aes_encrypt_key192(key.buf, &(o->ctx.encrypt_ctx));
|
||||
} else {
|
||||
aes_decrypt_key192(key.buf, &(o->ctx.decrypt_ctx));
|
||||
}
|
||||
break;
|
||||
case 32:
|
||||
if ((o->mode & 0x80) == 0x00) {
|
||||
aes_encrypt_key256(key.buf, &(o->ctx.encrypt_ctx));
|
||||
} else {
|
||||
aes_decrypt_key256(key.buf, &(o->ctx.decrypt_ctx));
|
||||
}
|
||||
break;
|
||||
}
|
||||
return MP_OBJ_FROM_PTR(o);
|
||||
}
|
||||
|
||||
/// def AES.crypt(self, data: bytes) -> bytes
|
||||
STATIC mp_obj_t mod_TrezorCrypto_AES_update(mp_obj_t self, mp_obj_t data) {
|
||||
mp_buffer_info_t buf;
|
||||
mp_get_buffer_raise(data, &buf, MP_BUFFER_READ);
|
||||
mp_obj_AES_t *o = MP_OBJ_TO_PTR(self);
|
||||
vstr_t vstr;
|
||||
vstr_init_len(&vstr, buf.len);
|
||||
switch (o->mode & 0x7F) {
|
||||
case 0x00: // ECB
|
||||
if (buf.len & (AES_BLOCK_SIZE - 1)) {
|
||||
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid data length"));
|
||||
}
|
||||
if ((o->mode & 0x80) == 0x00) {
|
||||
aes_ecb_encrypt(buf.buf, (unsigned char *)vstr.buf, buf.len, &(o->ctx.encrypt_ctx));
|
||||
} else {
|
||||
aes_ecb_decrypt(buf.buf, (unsigned char *)vstr.buf, buf.len, &(o->ctx.decrypt_ctx));
|
||||
}
|
||||
break;
|
||||
case 0x01: // CBC
|
||||
if (buf.len & (AES_BLOCK_SIZE - 1)) {
|
||||
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid data length"));
|
||||
}
|
||||
if ((o->mode & 0x80) == 0x00) {
|
||||
aes_cbc_encrypt(buf.buf, (unsigned char *)vstr.buf, buf.len, o->iv, &(o->ctx.encrypt_ctx));
|
||||
} else {
|
||||
aes_cbc_decrypt(buf.buf, (unsigned char *)vstr.buf, buf.len, o->iv, &(o->ctx.decrypt_ctx));
|
||||
}
|
||||
break;
|
||||
case 0x02: // CFB
|
||||
if ((o->mode & 0x80) == 0x00) {
|
||||
aes_cfb_encrypt(buf.buf, (unsigned char *)vstr.buf, buf.len, o->iv, &(o->ctx.encrypt_ctx));
|
||||
} else {
|
||||
aes_cfb_decrypt(buf.buf, (unsigned char *)vstr.buf, buf.len, o->iv, &(o->ctx.encrypt_ctx));
|
||||
}
|
||||
break;
|
||||
case 0x03: // OFB (encrypt == decrypt)
|
||||
aes_ofb_crypt(buf.buf, (unsigned char *)vstr.buf, buf.len, o->iv, &(o->ctx.encrypt_ctx));
|
||||
break;
|
||||
case 0x04: // CTR (encrypt == decrypt)
|
||||
aes_ctr_crypt(buf.buf, (unsigned char *)vstr.buf, buf.len, o->ctr, aes_ctr_cbuf_inc, &(o->ctx.encrypt_ctx));
|
||||
break;
|
||||
}
|
||||
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_AES_update_obj, mod_TrezorCrypto_AES_update);
|
||||
|
||||
STATIC mp_obj_t mod_TrezorCrypto_AES___del__(mp_obj_t self) {
|
||||
mp_obj_AES_t *o = MP_OBJ_TO_PTR(self);
|
||||
memset(&(o->ctx), 0, sizeof(aes_encrypt_ctx));
|
||||
return mp_const_none;
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_TrezorCrypto_AES___del___obj, mod_TrezorCrypto_AES___del__);
|
||||
|
||||
STATIC const mp_rom_map_elem_t mod_TrezorCrypto_AES_locals_dict_table[] = {
|
||||
{ MP_ROM_QSTR(MP_QSTR_update), MP_ROM_PTR(&mod_TrezorCrypto_AES_update_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mod_TrezorCrypto_AES___del___obj) },
|
||||
};
|
||||
STATIC MP_DEFINE_CONST_DICT(mod_TrezorCrypto_AES_locals_dict, mod_TrezorCrypto_AES_locals_dict_table);
|
||||
|
||||
STATIC const mp_obj_type_t mod_TrezorCrypto_AES_type = {
|
||||
{ &mp_type_type },
|
||||
.name = MP_QSTR_AES,
|
||||
.make_new = mod_TrezorCrypto_AES_make_new,
|
||||
.locals_dict = (void*)&mod_TrezorCrypto_AES_locals_dict,
|
||||
};
|
||||
@ -0,0 +1,31 @@
|
||||
from TrezorCrypto import AES as _AES
|
||||
|
||||
def AES_ECB_Encrypt(key):
|
||||
return _AES(0x00, key)
|
||||
|
||||
def AES_ECB_Decrypt(key):
|
||||
return _AES(0x80, key)
|
||||
|
||||
def AES_CBC_Encrypt(key, iv):
|
||||
return _AES(0x01, key, iv)
|
||||
|
||||
def AES_CBC_Decrypt(key, iv):
|
||||
return _AES(0x81, key, iv)
|
||||
|
||||
def AES_CFB_Encrypt(key, iv):
|
||||
return _AES(0x02, key, iv)
|
||||
|
||||
def AES_CFB_Decrypt(key, iv):
|
||||
return _AES(0x82, key, iv)
|
||||
|
||||
def AES_OFB_Encrypt(key, iv):
|
||||
return _AES(0x03, key, iv)
|
||||
|
||||
def AES_OFB_Decrypt(key, iv):
|
||||
return _AES(0x83, key, iv)
|
||||
|
||||
def AES_CTR_Encrypt(key):
|
||||
return _AES(0x04, key)
|
||||
|
||||
def AES_CTR_Decrypt(key):
|
||||
return _AES(0x84, key)
|
||||
@ -1 +1 @@
|
||||
Subproject commit 3f91c5658d20547d7d5211f2010b3aeabd32288e
|
||||
Subproject commit 25e1380cc1fc5197de8f05d6b8df02a30e8d3f65
|
||||
Loading…
Reference in new issue