From 0cdcd10228b1845a1c66ba97527e612eed1f5e2f Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Mon, 4 Nov 2019 08:57:40 -0500
Subject: Rename RC4 implementation (non-bisectable)

---
 libqpdf/RC4.cc | 57 ---------------------------------------------------------
 1 file changed, 57 deletions(-)
 delete mode 100644 libqpdf/RC4.cc

(limited to 'libqpdf/RC4.cc')

diff --git a/libqpdf/RC4.cc b/libqpdf/RC4.cc
deleted file mode 100644
index 8ab242a0..00000000
--- a/libqpdf/RC4.cc
+++ /dev/null
@@ -1,57 +0,0 @@
-#include <qpdf/RC4.hh>
-#include <qpdf/QIntC.hh>
-
-#include <string.h>
-
-static void swap_byte(unsigned char &a, unsigned char &b)
-{
-    unsigned char t;
-
-    t = a;
-    a = b;
-    b = t;
-}
-
-RC4::RC4(unsigned char const* key_data, int key_len)
-{
-    if (key_len == -1)
-    {
-	key_len = QIntC::to_int(
-            strlen(reinterpret_cast<char const*>(key_data)));
-    }
-
-    for (int i = 0; i < 256; ++i)
-    {
-        key.state[i] = static_cast<unsigned char>(i);
-    }
-    key.x = 0;
-    key.y = 0;
-
-    int i1 = 0;
-    int i2 = 0;
-    for (int i = 0; i < 256; ++i)
-    {
-	i2 = (key_data[i1] + key.state[i] + i2) % 256;
-	swap_byte(key.state[i], key.state[i2]);
-	i1 = (i1 + 1) % key_len;
-    }
-}
-
-void
-RC4::process(unsigned char *in_data, size_t len, unsigned char* out_data)
-{
-    if (out_data == 0)
-    {
-	// Convert in place
-	out_data = in_data;
-    }
-
-    for (size_t i = 0; i < len; ++i)
-    {
-	key.x = static_cast<unsigned char>((key.x + 1) % 256);
-	key.y = static_cast<unsigned char>((key.state[key.x] + key.y) % 256);
-	swap_byte(key.state[key.x], key.state[key.y]);
-	int xor_index = (key.state[key.x] + key.state[key.y]) % 256;
-	out_data[i] = in_data[i] ^ key.state[xor_index];
-    }
-}
-- 
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