trezor.crypto.aes work in progres

extmod/modtrezorcrypto/modtrezorcrypto-aes.h

@@ -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,
+};

extmod/modtrezorcrypto/modtrezorcrypto.c

@@ -15,6 +15,7 @@
 
 #if MICROPY_PY_TREZORCRYPTO
 
+#include "modtrezorcrypto-aes.h"
 #include "modtrezorcrypto-bip39.h"
 #include "modtrezorcrypto-ed25519.h"
 #include "modtrezorcrypto-pbkdf2.h"
@@ -30,6 +31,7 @@
 
 STATIC const mp_rom_map_elem_t mp_module_TrezorCrypto_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_TrezorCrypto) },
+    { MP_ROM_QSTR(MP_QSTR_AES), MP_ROM_PTR(&mod_TrezorCrypto_AES_type) },
     { MP_ROM_QSTR(MP_QSTR_Bip39), MP_ROM_PTR(&mod_TrezorCrypto_Bip39_type) },
     { MP_ROM_QSTR(MP_QSTR_Ed25519), MP_ROM_PTR(&mod_TrezorCrypto_Ed25519_type) },
     { MP_ROM_QSTR(MP_QSTR_Nist256p1), MP_ROM_PTR(&mod_TrezorCrypto_Nist256p1_type) },

src/trezor/crypto/aes.py

@@ -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)

vendor/micropython

@@ -1 +1 @@
-Subproject commit 3f91c5658d20547d7d5211f2010b3aeabd32288e
+Subproject commit 25e1380cc1fc5197de8f05d6b8df02a30e8d3f65