Add RC4 encryption from OpenSSL

7 files changed, 88 insertions, 0 deletions

diff --git a/src/cipherssingleton.cpp b/src/cipherssingleton.cpp
index 89c66e8..1bdf98f 100644
--- a/src/cipherssingleton.cpp
+++ b/src/cipherssingleton.cpp
@@ -11,6 +11,7 @@ CiphersSingleton::CiphersSingleton()
     //Enter QStrings as Descriptions for symmetric Ciphers
     m_symmetricCipherDescriptions.append( QString("NullCipher") );
     m_symmetricCipherDescriptions.append( QString("Caesar") );
+    m_symmetricCipherDescriptions.append( QString("RC4") );
     m_symmetricCipherDescriptions.append( QString("Cube") );
     m_symmetricCipherDescriptions.append( QString("AES") );
 
diff --git a/src/crypt/cryptclassrc4.cpp b/src/crypt/cryptclassrc4.cpp
new file mode 100644
index 0000000..c1ab511
--- /dev/null
+++ b/src/crypt/cryptclassrc4.cpp
@@ -0,0 +1,19 @@
+#include "cryptclassrc4.h"
+
+CryptClassRc4::CryptClassRc4()
+{
+}
+
+void CryptClassRc4::encrypt()
+{
+    qDebug() << "Encrypt RC4";
+    cryptClass.rc4SetKey(m_key);
+    m_cryptText = cryptClass.rc4Run(m_clearText);
+}
+
+void CryptClassRc4::decrypt()
+{
+    qDebug() << "Decrypt RC4";
+    cryptClass.rc4SetKey(m_key);
+    m_clearText = cryptClass.rc4Run(m_cryptText);
+}
diff --git a/src/crypt/cryptclassrc4.h b/src/crypt/cryptclassrc4.h
new file mode 100644
index 0000000..edb1bbc
--- /dev/null
+++ b/src/crypt/cryptclassrc4.h
@@ -0,0 +1,23 @@
+#ifndef CRYPTCLASSRC4_H
+#define CRYPTCLASSRC4_H
+
+#include "cryptclassbase.h"
+#include <QDebug>
+#include "cryptrc4.h"
+
+
+class CryptClassRc4 : public CryptClassBase
+{
+public:
+    CryptClassRc4();
+
+    // CryptClassBase interface
+public:
+    void encrypt();
+    void decrypt();
+
+private:
+    CryptRc4 cryptClass;
+};
+
+#endif // CRYPTCLASSRC4_H
diff --git a/src/crypt/cryptengine.cpp b/src/crypt/cryptengine.cpp
index 2a943d5..3e620a6 100644
--- a/src/crypt/cryptengine.cpp
+++ b/src/crypt/cryptengine.cpp
@@ -100,6 +100,12 @@ void CryptEngine::oncipherSelected_triggered(int cipher)
         m_cryptClass = new CryptClassCaesar;
         qDebug("CryptEngine::oncipherSelected_triggered - Caesar");
     }
+    else if( algorithm == "RC4" )
+    {
+        delete m_cryptClass;
+        m_cryptClass = new CryptClassRc4;
+        qDebug("CryptEngine::oncipherSelected_triggered - RC4");
+    }
     else if( algorithm == "Cube" )
     {
 //        delete m_cryptClass;
diff --git a/src/crypt/cryptengine.h b/src/crypt/cryptengine.h
index 2574fb3..df91599 100644
--- a/src/crypt/cryptengine.h
+++ b/src/crypt/cryptengine.h
@@ -7,6 +7,7 @@
 #include "cryptclassbase.h"
 #include "cryptclassnullcipher.h"
 #include "cryptclasscaesar.h"
+#include "cryptclassrc4.h"
 //#include "cryptclasscube.h"
 //#include "cryptclassaes.h"
 //#include "cryptclassrsa.h"
diff --git a/src/crypt/cryptrc4.cpp b/src/crypt/cryptrc4.cpp
new file mode 100644
index 0000000..701525d
--- /dev/null
+++ b/src/crypt/cryptrc4.cpp
@@ -0,0 +1,19 @@
+#include "cryptrc4.h"
+
+CryptRc4::CryptRc4()
+{
+
+}
+
+void CryptRc4::rc4SetKey(QByteArray key)
+{
+    RC4_set_key(&m_rc4Key, key.length(), (const unsigned char *) key.data());
+}
+
+QByteArray CryptRc4::rc4Run(QByteArray clear)
+{
+    QByteArray crypt(clear);
+    RC4(&m_rc4Key, clear.length(), (const unsigned char *) clear.data(), (unsigned char *) crypt.data());
+    return crypt;
+}
+
diff --git a/src/crypt/cryptrc4.h b/src/crypt/cryptrc4.h
new file mode 100644
index 0000000..12e7c65
--- /dev/null
+++ b/src/crypt/cryptrc4.h
@@ -0,0 +1,19 @@
+#ifndef CRYPTRC4_H
+#define CRYPTRC4_H
+
+#include <openssl/rc4.h>
+#include <QByteArray>
+#include <QDebug>
+
+class CryptRc4
+{
+public:
+    CryptRc4();
+
+    void rc4SetKey(QByteArray key);
+    QByteArray rc4Run(QByteArray clear);
+private:
+    RC4_KEY m_rc4Key;
+};
+
+#endif // CRYPTRC4_H