Intermediate hexify out change
diff --git a/tests/suites/test_suite_arc4.function b/tests/suites/test_suite_arc4.function
index a4b401b..e3ff303 100644
--- a/tests/suites/test_suite_arc4.function
+++ b/tests/suites/test_suite_arc4.function
@@ -8,30 +8,22 @@
  */
 
 /* BEGIN_CASE */
-void mbedtls_arc4_crypt( char *hex_src_string, char *hex_key_string,
-                 char *hex_dst_string )
+void mbedtls_arc4_crypt( uint8_t * src_str, uint32_t src_len,
+                         uint8_t * key_str, uint32_t key_len,
+                         uint8_t * hex_dst_string, uint32_t hex_dst_string_len
+                         )
 {
-    unsigned char src_str[1000];
-    unsigned char key_str[1000];
     unsigned char dst_str[1000];
-    unsigned char dst_hexstr[2000];
-    int src_len, key_len;
     mbedtls_arc4_context ctx;
 
-    memset(src_str, 0x00, 1000);
-    memset(key_str, 0x00, 1000);
     memset(dst_str, 0x00, 1000);
-    memset(dst_hexstr, 0x00, 2000);
     mbedtls_arc4_init( &ctx );
 
-    src_len = unhexify( src_str, hex_src_string );
-    key_len = unhexify( key_str, hex_key_string );
 
     mbedtls_arc4_setup(&ctx, key_str, key_len);
     TEST_ASSERT( mbedtls_arc4_crypt(&ctx, src_len, src_str, dst_str ) == 0 );
-    hexify( dst_hexstr, dst_str, src_len );
 
-    TEST_ASSERT( strcmp( (char *) dst_hexstr, hex_dst_string ) == 0 );
+    TEST_ASSERT( hexcmp( dst_str, hex_dst_string, src_len, hex_dst_string_len ) == 0 );
 
 exit:
     mbedtls_arc4_free( &ctx );
@@ -39,7 +31,7 @@
 /* END_CASE */
 
 /* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
-void arc4_selftest()
+void arc4_selftest(  )
 {
     TEST_ASSERT( mbedtls_arc4_self_test( 1 ) == 0 );
 }