Merge the openssl code together.

Having the code diffused all over the place was ugly and would
not scale well to multiple alternative providers.

GH #368

1 files changed, 73 insertions, 0 deletions

diff --git a/src/lib/prov/openssl/openssl_rc4.cpp b/src/lib/prov/openssl/openssl_rc4.cpp
new file mode 100644
index 000000000..84d739c91
--- /dev/null
+++ b/src/lib/prov/openssl/openssl_rc4.cpp
@@ -0,0 +1,73 @@
+/*
+* OpenSSL RC4
+* (C) 1999-2007,2015 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/stream_cipher.h>
+
+#if defined(BOTAN_HAS_OPENSSL)
+
+#include <botan/internal/algo_registry.h>
+#include <botan/internal/openssl.h>
+#include <botan/parsing.h>
+#include <openssl/rc4.h>
+
+namespace Botan {
+
+namespace {
+
+class OpenSSL_RC4 : public StreamCipher
+   {
+   public:
+      void clear() { clear_mem(&m_rc4, 1); }
+
+      std::string name() const
+         {
+         switch(m_skip)
+            {
+            case 0:
+               return "RC4";
+            case 256:
+               return "MARK-4";
+            default:
+               return "RC4_skip(" + std::to_string(m_skip) + ")";
+            }
+         }
+
+      StreamCipher* clone() const { return new OpenSSL_RC4; }
+
+      Key_Length_Specification key_spec() const
+         {
+         return Key_Length_Specification(1, 32);
+         }
+
+      OpenSSL_RC4(size_t skip = 0) : m_skip(skip) { clear(); }
+      ~OpenSSL_RC4() { clear(); }
+   private:
+      void cipher(const byte in[], byte out[], size_t length)
+         {
+         ::RC4(&m_rc4, length, in, out);
+         }
+
+      void key_schedule(const byte key[], size_t length)
+         {
+         ::RC4_set_key(&m_rc4, length, key);
+         byte d = 0;
+         for(size_t i = 0; i != m_skip; ++i)
+            ::RC4(&m_rc4, 1, &d, &d);
+         }
+
+      size_t m_skip;
+      RC4_KEY m_rc4;
+   };
+
+}
+
+BOTAN_REGISTER_TYPE(StreamCipher, OpenSSL_RC4, "RC4", (make_new_T_1len<OpenSSL_RC4,0>),
+                    "openssl", BOTAN_OPENSSL_RC4_PRIO);
+
+}
+
+#endif