Modularize RNG implementations

1 files changed, 0 insertions, 223 deletions

diff --git a/src/randpool.cpp b/src/randpool.cpp
deleted file mode 100644
index 69ef3b9e7..000000000
--- a/src/randpool.cpp
+++ /dev/null
@@ -1,223 +0,0 @@
-/*************************************************
-* Randpool Source File                           *
-* (C) 1999-2008 Jack Lloyd                       *
-*************************************************/
-
-#include <botan/randpool.h>
-#include <botan/lookup.h>
-#include <botan/loadstor.h>
-#include <botan/xor_buf.h>
-#include <botan/util.h>
-#include <botan/stl_util.h>
-#include <algorithm>
-
-namespace Botan {
-
-namespace {
-
-/*************************************************
-* PRF based on a MAC                             *
-*************************************************/
-enum RANDPOOL_PRF_TAG {
-   CIPHER_KEY = 0,
-   MAC_KEY    = 1,
-   GEN_OUTPUT = 2
-};
-
-}
-
-/*************************************************
-* Generate a buffer of random bytes              *
-*************************************************/
-void Randpool::randomize(byte out[], u32bit length)
-   {
-   if(!is_seeded())
-      {
-      reseed();
-
-      if(!is_seeded())
-         throw PRNG_Unseeded(name());
-      }
-
-   update_buffer();
-   while(length)
-      {
-      const u32bit copied = std::min(length, buffer.size());
-      copy_mem(out, buffer.begin(), copied);
-      out += copied;
-      length -= copied;
-      update_buffer();
-      }
-   }
-
-/*************************************************
-* Refill the output buffer                       *
-*************************************************/
-void Randpool::update_buffer()
-   {
-   const u64bit timestamp = system_time();
-
-   for(u32bit j = 0; j != counter.size(); ++j)
-      if(++counter[j])
-         break;
-   store_be(timestamp, counter + 4);
-
-   mac->update(static_cast<byte>(GEN_OUTPUT));
-   mac->update(counter, counter.size());
-   SecureVector<byte> mac_val = mac->final();
-
-   for(u32bit j = 0; j != mac_val.size(); ++j)
-      buffer[j % buffer.size()] ^= mac_val[j];
-   cipher->encrypt(buffer);
-
-   if(counter[0] % ITERATIONS_BEFORE_RESEED == 0)
-      mix_pool();
-   }
-
-/*************************************************
-* Mix the entropy pool                           *
-*************************************************/
-void Randpool::mix_pool()
-   {
-   const u32bit BLOCK_SIZE = cipher->BLOCK_SIZE;
-
-   mac->update(static_cast<byte>(MAC_KEY));
-   mac->update(pool, pool.size());
-   mac->set_key(mac->final());
-
-   mac->update(static_cast<byte>(CIPHER_KEY));
-   mac->update(pool, pool.size());
-   cipher->set_key(mac->final());
-
-   xor_buf(pool, buffer, BLOCK_SIZE);
-   cipher->encrypt(pool);
-   for(u32bit j = 1; j != POOL_BLOCKS; ++j)
-      {
-      const byte* previous_block = pool + BLOCK_SIZE*(j-1);
-      byte* this_block = pool + BLOCK_SIZE*j;
-      xor_buf(this_block, previous_block, BLOCK_SIZE);
-      cipher->encrypt(this_block);
-      }
-
-   update_buffer();
-   }
-
-/*************************************************
-* Reseed the internal state                      *
-*************************************************/
-void Randpool::reseed()
-   {
-   SecureVector<byte> buffer(1024);
-   u32bit gathered_entropy = 0;
-
-   for(u32bit j = 0; j != entropy_sources.size(); ++j)
-      {
-      u32bit got = entropy_sources[j]->slow_poll(buffer, buffer.size());
-
-      mac->update(buffer, got);
-
-      gathered_entropy += entropy_estimate(buffer, got);
-      if(gathered_entropy > 512)
-         break;
-      }
-
-   SecureVector<byte> mac_val = mac->final();
-   xor_buf(pool, mac_val, mac_val.size());
-   mix_pool();
-
-   entropy += gathered_entropy;
-   }
-
-/*************************************************
-* Add user-supplied entropy                      *
-*************************************************/
-void Randpool::add_entropy(const byte input[], u32bit length)
-   {
-   SecureVector<byte> mac_val = mac->process(input, length);
-   xor_buf(pool, mac_val, mac_val.size());
-   mix_pool();
-
-   entropy += entropy_estimate(input, length);
-   }
-
-/*************************************************
-* Add another entropy source to the list         *
-*************************************************/
-void Randpool::add_entropy_source(EntropySource* src)
-   {
-   entropy_sources.push_back(src);
-   }
-
-/*************************************************
-* Check if the the pool is seeded                *
-*************************************************/
-bool Randpool::is_seeded() const
-   {
-   return (entropy >= 384);
-   }
-
-/*************************************************
-* Clear memory of sensitive data                 *
-*************************************************/
-void Randpool::clear() throw()
-   {
-   cipher->clear();
-   mac->clear();
-   pool.clear();
-   buffer.clear();
-   counter.clear();
-   entropy = 0;
-   }
-
-/*************************************************
-* Return the name of this type                   *
-*************************************************/
-std::string Randpool::name() const
-   {
-   return "Randpool(" + cipher->name() + "," + mac->name() + ")";
-   }
-
-/*************************************************
-* Randpool Constructor                           *
-*************************************************/
-Randpool::Randpool(const std::string& cipher_name,
-                   const std::string& mac_name) :
-   ITERATIONS_BEFORE_RESEED(128), POOL_BLOCKS(32)
-   {
-   cipher = get_block_cipher(cipher_name);
-   mac = get_mac(mac_name);
-
-   const u32bit BLOCK_SIZE = cipher->BLOCK_SIZE;
-   const u32bit OUTPUT_LENGTH = mac->OUTPUT_LENGTH;
-
-   if(OUTPUT_LENGTH < BLOCK_SIZE ||
-      !cipher->valid_keylength(OUTPUT_LENGTH) ||
-      !mac->valid_keylength(OUTPUT_LENGTH))
-      {
-      delete cipher;
-      delete mac;
-      throw Internal_Error("Randpool: Invalid algorithm combination " +
-                           cipher_name + "/" + mac_name);
-      }
-
-   buffer.create(BLOCK_SIZE);
-   pool.create(POOL_BLOCKS * BLOCK_SIZE);
-   counter.create(12);
-   entropy = 0;
-   }
-
-/*************************************************
-* Randpool Destructor                            *
-*************************************************/
-Randpool::~Randpool()
-   {
-   delete cipher;
-   delete mac;
-
-   std::for_each(entropy_sources.begin(), entropy_sources.end(),
-                 del_fun<EntropySource>());
-
-   entropy = 0;
-   }
-
-}