1 files changed, 95 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/block/gost_28147/gost_28147.h b/comm/third_party/botan/src/lib/block/gost_28147/gost_28147.h
new file mode 100644
index 0000000000..f71bb28bd9
--- /dev/null
+++ b/comm/third_party/botan/src/lib/block/gost_28147/gost_28147.h
@@ -0,0 +1,95 @@
+/*
+* GOST 28147-89
+* (C) 1999-2009 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_GOST_28147_89_H_
+#define BOTAN_GOST_28147_89_H_
+
+#include <botan/block_cipher.h>
+
+BOTAN_FUTURE_INTERNAL_HEADER(gost_28147.h)
+
+namespace Botan {
+
+/**
+* The GOST 28147-89 block cipher uses a set of 4 bit Sboxes, however
+* the standard does not actually define these Sboxes; they are
+* considered a local configuration issue. Several different sets are
+* used.
+*/
+class BOTAN_PUBLIC_API(2,0) GOST_28147_89_Params final
+   {
+   public:
+      /**
+      * @param row the row
+      * @param col the column
+      * @return sbox entry at this row/column
+      */
+      uint8_t sbox_entry(size_t row, size_t col) const;
+
+      /**
+      * @return name of this parameter set
+      */
+      std::string param_name() const { return m_name; }
+
+      /**
+      * Return a representation used for building larger tables
+      * For internal use
+      */
+      uint8_t sbox_pair(size_t row, size_t col) const;
+
+      /**
+      * Default GOST parameters are the ones given in GOST R 34.11 for
+      * testing purposes; these sboxes are also used by Crypto++, and,
+      * at least according to Wikipedia, the Central Bank of Russian
+      * Federation
+      * @param name of the parameter set
+      */
+      explicit GOST_28147_89_Params(const std::string& name = "R3411_94_TestParam");
+   private:
+      const uint8_t* m_sboxes;
+      std::string m_name;
+   };
+
+/**
+* GOST 28147-89
+*/
+class BOTAN_PUBLIC_API(2,0) GOST_28147_89 final : public Block_Cipher_Fixed_Params<8, 32>
+   {
+   public:
+      void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
+      void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
+
+      void clear() override;
+
+      std::string name() const override;
+      BlockCipher* clone() const override { return new GOST_28147_89(m_SBOX); }
+
+      /**
+      * @param params the sbox parameters to use
+      */
+      explicit GOST_28147_89(const GOST_28147_89_Params& params);
+
+      explicit GOST_28147_89(const std::string& param_name) :
+         GOST_28147_89(GOST_28147_89_Params(param_name)) {}
+   private:
+      explicit GOST_28147_89(const std::vector<uint32_t>& other_SBOX) :
+         m_SBOX(other_SBOX), m_EK(8) {}
+
+      void key_schedule(const uint8_t[], size_t) override;
+
+      /*
+      * The sbox is not secret, this is just a larger expansion of it
+      * which we generate at runtime for faster execution
+      */
+      std::vector<uint32_t> m_SBOX;
+
+      secure_vector<uint32_t> m_EK;
+   };
+
+}
+
+#endif