+++ /dev/null
-//-----------------------------------------------------------------------------
-// Copyright (C) 2018 Merlok
-// Copyright (C) 2018 drHatson
-//
-// This code is licensed to you under the terms of the GNU GPL, version 2 or,
-// at your option, any later version. See the LICENSE.txt file for the text of
-// the license.
-//-----------------------------------------------------------------------------
-// crypto commands
-//-----------------------------------------------------------------------------
-
-#include "polarssl/libpcrypto.h"
-#include <polarssl/aes.h>
-#include <polarssl/aes_cmac128.h>
-
-// NIST Special Publication 800-38A \97 Recommendation for block cipher modes of operation: methods and techniques, 2001.
-int aes_encode(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *output, int length){
- uint8_t iiv[16] = {0};
- if (iv)
- memcpy(iiv, iv, 16);
-
- aes_context aes;
- aes_init(&aes);
- if (aes_setkey_enc(&aes, key, 128))
- return 1;
- if (aes_crypt_cbc(&aes, AES_ENCRYPT, length, iiv, input, output))
- return 2;
- aes_free(&aes);
-
- return 0;
-}
-
-int aes_decode(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *output, int length){
- uint8_t iiv[16] = {0};
- if (iv)
- memcpy(iiv, iv, 16);
-
- aes_context aes;
- aes_init(&aes);
- if (aes_setkey_dec(&aes, key, 128))
- return 1;
- if (aes_crypt_cbc(&aes, AES_DECRYPT, length, iiv, input, output))
- return 2;
- aes_free(&aes);
-
- return 0;
-}
-
-// NIST Special Publication 800-38B \97 Recommendation for block cipher modes of operation: The CMAC mode for authentication.
-// https://csrc.nist.gov/CSRC/media/Projects/Cryptographic-Standards-and-Guidelines/documents/examples/AES_CMAC.pdf
-int aes_cmac(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *mac, int length) {
- memset(mac, 0x00, 16);
- uint8_t iiv[16] = {0};
- if (iv)
- memcpy(iiv, iv, 16);
-
- // NIST 800-38B
- aes_cmac128_context ctx;
- aes_cmac128_starts(&ctx, key);
- aes_cmac128_update(&ctx, input, length);
- aes_cmac128_final(&ctx, mac);
-
- return 0;
-}
-
-int aes_cmac8(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *mac, int length) {
- uint8_t cmac[16] = {0};
- memset(mac, 0x00, 8);
-
- int res = aes_cmac(iv, key, input, cmac, length);
- if (res)
- return res;
-
- for(int i = 0; i < 8; i++)
- mac[i] = cmac[i * 2 + 1];
-
- return 0;
-}