From 9a0b88bf7777c153dc46ace22db74ef24d51583a Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Tue, 29 Apr 2008 12:55:25 +0000
Subject: update release date to actual date

git-svn-id: svn+q:///qpdf/trunk@599 71b93d88-0707-0410-a8cf-f5a4172ac649
---
 libqpdf/Pl_RC4.cc | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 libqpdf/Pl_RC4.cc

(limited to 'libqpdf/Pl_RC4.cc')

diff --git a/libqpdf/Pl_RC4.cc b/libqpdf/Pl_RC4.cc
new file mode 100644
index 00000000..74e53c8b
--- /dev/null
+++ b/libqpdf/Pl_RC4.cc
@@ -0,0 +1,57 @@
+
+#include <qpdf/Pl_RC4.hh>
+
+#include <qpdf/QUtil.hh>
+
+Pl_RC4::Pl_RC4(char const* identifier, Pipeline* next,
+	       unsigned char const* key_data, int key_len,
+	       int out_bufsize) :
+    Pipeline(identifier, next),
+    out_bufsize(out_bufsize),
+    rc4(key_data, key_len)
+{
+    this->outbuf = new unsigned char[out_bufsize];
+}
+
+Pl_RC4::~Pl_RC4()
+{
+    if (this->outbuf)
+    {
+	delete [] this->outbuf;
+	this->outbuf = 0;
+    }
+}
+
+void
+Pl_RC4::write(unsigned char* data, int len)
+{
+    if (this->outbuf == 0)
+    {
+	throw Exception(
+	    this->identifier +
+	    ": Pl_RC4: write() called after finish() called");
+    }
+
+    int bytes_left = len;
+    unsigned char* p = data;
+
+    while (bytes_left > 0)
+    {
+	int bytes = (bytes_left < this->out_bufsize ? bytes_left : out_bufsize);
+	bytes_left -= bytes;
+	rc4.process(p, bytes, outbuf);
+	p += bytes;
+	getNext()->write(outbuf, bytes);
+    }
+}
+
+void
+Pl_RC4::finish()
+{
+    if (this->outbuf)
+    {
+	delete [] this->outbuf;
+	this->outbuf = 0;
+    }
+    this->getNext()->finish();
+}
-- 
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