Make XTS a Transformation under src/modes

Move AEAD modes to src/modes/aead

Add filters for Transformations (based on original AEAD filters)

3 files changed, 0 insertions, 358 deletions

diff --git a/src/aead/gcm/gcm.cpp b/src/aead/gcm/gcm.cpp
deleted file mode 100644
index 7b8e0aa36..000000000
--- a/src/aead/gcm/gcm.cpp
+++ /dev/null
@@ -1,243 +0,0 @@
-/*
-* GCM Mode Encryption
-* (C) 2013 Jack Lloyd
-*
-* Distributed under the terms of the Botan license
-*/
-
-#include <botan/gcm.h>
-#include <botan/ctr.h>
-#include <botan/internal/xor_buf.h>
-#include <botan/loadstor.h>
-
-namespace Botan {
-
-namespace {
-
-void gcm_multiply(secure_vector<byte>& x,
-                  const secure_vector<byte>& h)
-   {
-   static const u64bit R = 0xE100000000000000;
-
-   u64bit H[2] = {
-      load_be<u64bit>(&h[0], 0),
-      load_be<u64bit>(&h[0], 1)
-   };
-
-   u64bit Z[2] = { 0, 0 };
-
-   // Both CLMUL and SSE2 versions would be useful
-
-   for(size_t i = 0; i != 2; ++i)
-      {
-      const u64bit X = load_be<u64bit>(&x[0], i);
-
-      for(size_t j = 0; j != 64; ++j)
-         {
-         if((X >> (63-j)) & 1)
-            {
-            Z[0] ^= H[0];
-            Z[1] ^= H[1];
-            }
-
-         const u64bit r = (H[1] & 1) ? R : 0;
-
-         H[1] = (H[0] << 63) | (H[1] >> 1);
-         H[0] = (H[0] >> 1) ^ r;
-         }
-      }
-
-   store_be<u64bit>(&x[0], Z[0], Z[1]);
-   }
-
-void ghash_update(const secure_vector<byte>& H,
-                  secure_vector<byte>& ghash,
-                  const byte input[], size_t length)
-   {
-   const size_t BS = 16;
-
-   /*
-   This assumes if less than block size input then we're just on the
-   final block and should pad with zeros
-   */
-   while(length)
-      {
-      const size_t to_proc = std::min(length, BS);
-
-      xor_buf(&ghash[0], &input[0], to_proc);
-
-      gcm_multiply(ghash, H);
-
-      input += to_proc;
-      length -= to_proc;
-      }
-   }
-
-void ghash_finalize(const secure_vector<byte>& H,
-                    secure_vector<byte>& ghash,
-                    size_t ad_len, size_t text_len)
-   {
-   secure_vector<byte> final_block(16);
-   store_be<u64bit>(&final_block[0], 8*ad_len, 8*text_len);
-   ghash_update(H, ghash, &final_block[0], final_block.size());
-   }
-
-}
-
-/*
-* GCM_Mode Constructor
-*/
-GCM_Mode::GCM_Mode(BlockCipher* cipher, size_t tag_size) :
-   m_tag_size(tag_size),
-   m_cipher_name(cipher->name()),
-   m_H(BS), m_H_ad(BS), m_mac(BS), m_enc_y0(BS),
-   m_ad_len(0), m_text_len(0)
-   {
-   if(cipher->block_size() != BS)
-      throw std::invalid_argument("GCM requires a 128 bit cipher so cannot be used with " +
-                                  cipher->name());
-
-   m_ctr.reset(new CTR_BE(cipher)); // CTR_BE takes ownership of cipher
-
-   if(m_tag_size < 8 || m_tag_size > 16)
-      throw Invalid_Argument(name() + ": Bad tag size " + std::to_string(m_tag_size));
-   }
-
-void GCM_Mode::clear()
-   {
-   zeroise(m_H);
-   zeroise(m_H_ad);
-   zeroise(m_mac);
-   zeroise(m_enc_y0);
-   m_ad_len = 0;
-   m_text_len = 0;
-   m_ctr.reset();
-   }
-
-std::string GCM_Mode::name() const
-   {
-   return (m_cipher_name + "/GCM");
-   }
-
-size_t GCM_Mode::update_granularity() const
-   {
-   return 4096; // CTR-BE's internal block size
-   }
-
-Key_Length_Specification GCM_Mode::key_spec() const
-   {
-   return m_ctr->key_spec();
-   }
-
-void GCM_Mode::key_schedule(const byte key[], size_t keylen)
-   {
-   m_ctr->set_key(key, keylen);
-
-   const std::vector<byte> zeros(BS);
-   m_ctr->set_iv(&zeros[0], zeros.size());
-
-   zeroise(m_H);
-   m_ctr->cipher(&m_H[0], &m_H[0], m_H.size());
-   }
-
-void GCM_Mode::set_associated_data(const byte ad[], size_t ad_len)
-   {
-   zeroise(m_H_ad);
-
-   ghash_update(m_H, m_H_ad, ad, ad_len);
-   m_ad_len = ad_len;
-   }
-
-secure_vector<byte> GCM_Mode::start(const byte nonce[], size_t nonce_len)
-   {
-   if(!valid_nonce_length(nonce_len))
-      throw Invalid_IV_Length(name(), nonce_len);
-
-   secure_vector<byte> y0(BS);
-
-   if(nonce_len == 12)
-      {
-      copy_mem(&y0[0], nonce, nonce_len);
-      y0[15] = 1;
-      }
-   else
-      {
-      ghash_update(m_H, y0, nonce, nonce_len);
-      ghash_finalize(m_H, y0, 0, nonce_len);
-      }
-
-   m_ctr->set_iv(&y0[0], y0.size());
-
-   zeroise(m_enc_y0);
-   m_ctr->encipher(m_enc_y0);
-
-   m_text_len = 0;
-   m_mac = m_H_ad;
-
-   return secure_vector<byte>();
-   }
-
-void GCM_Encryption::update(secure_vector<byte>& buffer, size_t offset)
-   {
-   BOTAN_ASSERT(buffer.size() >= offset, "Offset is sane");
-   const size_t sz = buffer.size() - offset;
-   byte* buf = &buffer[offset];
-
-   m_ctr->cipher(buf, buf, sz);
-   ghash_update(m_H, m_mac, buf, sz);
-   m_text_len += sz;
-   }
-
-void GCM_Encryption::finish(secure_vector<byte>& buffer, size_t offset)
-   {
-   update(buffer, offset);
-
-   ghash_finalize(m_H, m_mac, m_ad_len, m_text_len);
-
-   m_mac ^= m_enc_y0;
-
-   buffer += std::make_pair(&m_mac[0], tag_size());
-   }
-
-void GCM_Decryption::update(secure_vector<byte>& buffer, size_t offset)
-   {
-   BOTAN_ASSERT(buffer.size() >= offset, "Offset is sane");
-   const size_t sz = buffer.size() - offset;
-   byte* buf = &buffer[offset];
-
-   ghash_update(m_H, m_mac, buf, sz);
-   m_ctr->cipher(buf, buf, sz);
-   m_text_len += sz;
-   }
-
-void GCM_Decryption::finish(secure_vector<byte>& buffer, size_t offset)
-   {
-   BOTAN_ASSERT(buffer.size() >= offset, "Offset is sane");
-   const size_t sz = buffer.size() - offset;
-   byte* buf = &buffer[offset];
-
-   BOTAN_ASSERT(sz >= tag_size(), "Have the tag as part of final input");
-
-   const size_t remaining = sz - tag_size();
-
-   // handle any final input before the tag
-   if(remaining)
-      {
-      ghash_update(m_H, m_mac, buf, remaining);
-      m_ctr->cipher(buf, buf, remaining);
-      m_text_len += remaining;
-      }
-
-   ghash_finalize(m_H, m_mac, m_ad_len, m_text_len);
-
-   m_mac ^= m_enc_y0;
-
-   const byte* included_tag = &buffer[remaining];
-
-   if(!same_mem(&m_mac[0], included_tag, tag_size()))
-      throw Integrity_Failure("GCM tag check failed");
-
-   buffer.resize(offset + remaining);
-   }
-
-}
diff --git a/src/aead/gcm/gcm.h b/src/aead/gcm/gcm.h
deleted file mode 100644
index e1479c27f..000000000
--- a/src/aead/gcm/gcm.h
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
-* GCM Mode
-* (C) 2013 Jack Lloyd
-*
-* Distributed under the terms of the Botan license
-*/
-
-#ifndef BOTAN_AEAD_GCM_H__
-#define BOTAN_AEAD_GCM_H__
-
-#include <botan/aead.h>
-#include <botan/block_cipher.h>
-#include <botan/stream_cipher.h>
-#include <memory>
-
-namespace Botan {
-
-/**
-* GCM Mode
-*/
-class BOTAN_DLL GCM_Mode : public AEAD_Mode
-   {
-   public:
-      secure_vector<byte> start(const byte nonce[], size_t nonce_len) override;
-
-      void set_associated_data(const byte ad[], size_t ad_len) override;
-
-      std::string name() const override;
-
-      size_t update_granularity() const;
-
-      Key_Length_Specification key_spec() const override;
-
-      // GCM supports arbitrary nonce lengths
-      bool valid_nonce_length(size_t) const override { return true; }
-
-      void clear();
-   protected:
-      void key_schedule(const byte key[], size_t length) override;
-
-      GCM_Mode(BlockCipher* cipher, size_t tag_size);
-
-      size_t tag_size() const { return m_tag_size; }
-
-      static const size_t BS = 16;
-
-      const size_t m_tag_size;
-      const std::string m_cipher_name;
-
-      std::unique_ptr<StreamCipher> m_ctr;
-      secure_vector<byte> m_H;
-      secure_vector<byte> m_H_ad;
-      secure_vector<byte> m_mac;
-      secure_vector<byte> m_enc_y0;
-      size_t m_ad_len, m_text_len;
-   };
-
-/**
-* GCM Encryption
-*/
-class BOTAN_DLL GCM_Encryption : public GCM_Mode
-   {
-   public:
-      /**
-      * @param cipher the 128 bit block cipher to use
-      * @param tag_size is how big the auth tag will be
-      */
-      GCM_Encryption(BlockCipher* cipher, size_t tag_size = 16) :
-         GCM_Mode(cipher, tag_size) {}
-
-      size_t output_length(size_t input_length) const override
-         { return input_length + tag_size(); }
-
-      size_t minimum_final_size() const override { return 0; }
-
-      void update(secure_vector<byte>& blocks, size_t offset) override;
-
-      void finish(secure_vector<byte>& final_block, size_t offset) override;
-   };
-
-/**
-* GCM Decryption
-*/
-class BOTAN_DLL GCM_Decryption : public GCM_Mode
-   {
-   public:
-      /**
-      * @param cipher the 128 bit block cipher to use
-      * @param tag_size is how big the auth tag will be
-      */
-      GCM_Decryption(BlockCipher* cipher, size_t tag_size = 16) :
-         GCM_Mode(cipher, tag_size) {}
-
-      size_t output_length(size_t input_length) const override
-         {
-         BOTAN_ASSERT(input_length > tag_size(), "Sufficient input");
-         return input_length - tag_size();
-         }
-
-      size_t minimum_final_size() const override { return tag_size(); }
-
-      void update(secure_vector<byte>& blocks, size_t offset) override;
-
-      void finish(secure_vector<byte>& final_block, size_t offset) override;
-   };
-
-}
-
-#endif
diff --git a/src/aead/gcm/info.txt b/src/aead/gcm/info.txt
deleted file mode 100644
index 698cd0803..000000000
--- a/src/aead/gcm/info.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-define AEAD_GCM
-
-<requires>
-block
-ctr
-</requires>