#include "util.h"
#include "nonce2key/nonce2key.h"
#include "../common/iso15693tools.h"
+#include <openssl/aes.h>
+#include "../common/crc16.h"
/**
* The following params expected:
* UsbCommand c
return 1;
}
+/*
+ Simple AES 128 cbc hook up to OpenSSL.
+ params: key, input
+*/
+static int l_aes(lua_State *L)
+{
+ //Check number of arguments
+ int i;
+ size_t size;
+ const char *p_key = luaL_checklstring(L, 1, &size);
+ if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
+
+ const char *p_encTxt = luaL_checklstring(L, 2, &size);
+
+ unsigned char indata[AES_BLOCK_SIZE] = {0x00};
+ unsigned char outdata[AES_BLOCK_SIZE] = {0x00};
+ unsigned char aes_key[AES_BLOCK_SIZE] = {0x00};
+ unsigned char iv[AES_BLOCK_SIZE] = {0x00};
+
+ // convert key to bytearray
+ for (i = 0; i < 32; i += 2) {
+ sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
+ }
+
+ // convert input to bytearray
+ for (i = 0; i < 32; i += 2) {
+ sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
+ }
+
+ AES_KEY key;
+ AES_set_decrypt_key(aes_key, 128, &key);
+ AES_cbc_encrypt(indata, outdata, sizeof(indata), &key, iv, AES_DECRYPT);
+
+ //Push decrypted array as a string
+ lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
+ return 1;// return 1 to signal one return value
+}
+
+static int l_crc16(lua_State *L)
+{
+ size_t size;
+ const char *p_str = luaL_checklstring(L, 1, &size);
+
+ uint16_t retval = crc16_ccitt( (uint8_t*) p_str, size);
+ lua_pushinteger(L, (int) retval);
+ return 1;
+}
+
/**
* @brief Sets the lua path to include "./lualibs/?.lua", in order for a script to be
* able to do "require('foobar')" if foobar.lua is within lualibs folder.
{"clearCommandBuffer", l_clearCommandBuffer},
{"console", l_CmdConsole},
{"iso15693_crc", l_iso15693_crc},
+ {"aes", l_aes},
+ {"crc16", l_crc16},
{NULL, NULL}
};