FIX: fixed a minor bug introduced when changing from OpenSSL -> PolarSSL.

ADD:  changed code to handle both  encrypt and decrypt AES 128.

diff --git a/client/scripting.c b/client/scripting.c
index 50283c8797a6cb50f14fcd4db12fadb155ccf2df..15c336ff8a3351e9c1ed5fa58027f98f41da77fd 100644 (file)
--- a/client/scripting.c
+++ b/client/scripting.c
@@ -231,7 +231,7 @@ static int l_iso15693_crc(lua_State *L)
  Simple AES 128 cbc hook up to OpenSSL.
  params:  key, input
 */
-static int l_aes(lua_State *L)
+static int l_aes128decrypt(lua_State *L)
 {
        //Check number of arguments
        int i;
@@ -245,26 +245,46 @@ static int l_aes(lua_State *L)
        unsigned char outdata[16] = {0x00};
     unsigned char aes_key[16] = {0x00};
        unsigned char iv[16] = {0x00};
-       
-       // convert key to bytearray
+
        for (i = 0; i < 32; i += 2) {
                sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
+               sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
        }
+
+    aes_context ctx;
+    aes_init(&ctx);
+    //aes_setkey_enc(&ctx, (const unsigned char *)aes_key, 128);
+       aes_setkey_dec(&ctx, aes_key, 128);
+       aes_crypt_cbc(&ctx, AES_DECRYPT, sizeof(indata), iv, indata, outdata );
+    //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_aes128encrypt(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_txt = luaL_checklstring(L, 2, &size);
+    
+       unsigned char indata[16] = {0x00};
+       unsigned char outdata[16] = {0x00};
+    unsigned char aes_key[16] = {0x00};
+       unsigned char iv[16] = {0x00};
        
-       // convert input to bytearray
        for (i = 0; i < 32; i += 2) {
+               sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[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);
 
     aes_context ctx;
     aes_init(&ctx);
-    aes_setkey_enc(&ctx,(const unsigned char *)p_key,128);
-       aes_crypt_cbc(&ctx,AES_DECRYPT,sizeof(indata), iv, indata,outdata );
-    //Push decrypted array as a string
+    aes_setkey_enc(&ctx, aes_key, 128);
+       aes_crypt_cbc(&ctx, AES_ENCRYPT, sizeof(indata), iv, indata, outdata );
+    //Push encrypted array as a string
        lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
        return 1;// return 1 to signal one return value
 }
@@ -338,7 +358,8 @@ int set_pm3_libraries(lua_State *L)
         {"clearCommandBuffer",          l_clearCommandBuffer},
         {"console",                     l_CmdConsole},
         {"iso15693_crc",                l_iso15693_crc},
-               {"aes",                         l_aes},
+               {"aes128_decrypt",              l_aes128decrypt},
+               {"aes128_encrypt",              l_aes128encrypt},
                {"crc16",                       l_crc16},
                {"crc64",                                               l_crc64},
         {NULL, NULL}