1 files changed, 93 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/prov/openssl/openssl_rc4.cpp b/comm/third_party/botan/src/lib/prov/openssl/openssl_rc4.cpp
new file mode 100644
index 0000000000..dbda890f82
--- /dev/null
+++ b/comm/third_party/botan/src/lib/prov/openssl/openssl_rc4.cpp
@@ -0,0 +1,93 @@
+/*
+* 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) && defined(BOTAN_HAS_RC4)
+
+#include <botan/internal/openssl.h>
+#include <botan/parsing.h>
+#include <botan/exceptn.h>
+#include <openssl/rc4.h>
+
+namespace Botan {
+
+namespace {
+
+class OpenSSL_RC4 final : public StreamCipher
+   {
+   public:
+      void clear() override { clear_mem(&m_rc4, 1); m_key_set = false; }
+
+      std::string provider() const override { return "openssl"; }
+
+      std::string name() const override
+         {
+         switch(m_skip)
+            {
+            case 0:
+               return "RC4";
+            case 256:
+               return "MARK-4";
+            default:
+               return "RC4(" + std::to_string(m_skip) + ")";
+            }
+         }
+
+      StreamCipher* clone() const override { return new OpenSSL_RC4(m_skip); }
+
+      Key_Length_Specification key_spec() const override
+         {
+         return Key_Length_Specification(1, 32);
+         }
+
+      explicit OpenSSL_RC4(size_t skip = 0) : m_skip(skip) { clear(); }
+      ~OpenSSL_RC4() { clear(); }
+
+      void set_iv(const uint8_t*, size_t len) override
+         {
+         if(len > 0)
+            throw Invalid_IV_Length("RC4", len);
+         }
+
+      void seek(uint64_t) override
+         {
+         throw Not_Implemented("RC4 does not support seeking");
+         }
+   private:
+      void cipher(const uint8_t in[], uint8_t out[], size_t length) override
+         {
+         verify_key_set(m_key_set);
+         ::RC4(&m_rc4, length, in, out);
+         }
+
+      void key_schedule(const uint8_t key[], size_t length) override
+         {
+         ::RC4_set_key(&m_rc4, length, key);
+         uint8_t d = 0;
+         for(size_t i = 0; i != m_skip; ++i)
+            ::RC4(&m_rc4, 1, &d, &d);
+         m_key_set = true;
+         }
+
+      size_t m_skip;
+      RC4_KEY m_rc4;
+      bool m_key_set;
+   };
+
+}
+
+std::unique_ptr<StreamCipher>
+make_openssl_rc4(size_t skip)
+   {
+   return std::unique_ptr<StreamCipher>(new OpenSSL_RC4(skip));
+   }
+
+
+}
+
+#endif