X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/a25d5c1cdebbd9a0840620e9307ecc8a254c2315..c15d2bdc9b25da89931c767902639fa7e8c9b764:/client/scripting.c

diff --git a/client/scripting.c b/client/scripting.c
index 963bb64c..fd065a04 100644
--- a/client/scripting.c
+++ b/client/scripting.c
@@ -18,6 +18,7 @@
 #include "util.h"
 #include "nonce2key/nonce2key.h"
 #include "../common/iso15693tools.h"
+#include <openssl/aes.h>   
 /**
  * The following params expected:
  *  UsbCommand c
@@ -224,6 +225,44 @@ static int l_iso15693_crc(lua_State *L)
     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
+}
+
 /**
  * @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.
@@ -259,8 +298,9 @@ int set_pm3_libraries(lua_State *L)
         {"foobar",                      l_foobar},
         {"ukbhit",                      l_ukbhit},
         {"clearCommandBuffer",          l_clearCommandBuffer},
-        {"console",                      l_CmdConsole},
-        {"iso15693_crc",                 l_iso15693_crc},
+        {"console",                     l_CmdConsole},
+        {"iso15693_crc",                l_iso15693_crc},
+		{"aes",                         l_aes},
         {NULL, NULL}
     };