1 files changed, 170 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/filters/hex_filt.cpp b/comm/third_party/botan/src/lib/filters/hex_filt.cpp
new file mode 100644
index 0000000000..761c73ade1
--- /dev/null
+++ b/comm/third_party/botan/src/lib/filters/hex_filt.cpp
@@ -0,0 +1,170 @@
+/*
+* Hex Encoder/Decoder
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/filters.h>
+#include <botan/hex.h>
+#include <botan/exceptn.h>
+#include <algorithm>
+
+namespace Botan {
+
+/**
+* Size used for internal buffer in hex encoder/decoder
+*/
+const size_t HEX_CODEC_BUFFER_SIZE = 256;
+
+/*
+* Hex_Encoder Constructor
+*/
+Hex_Encoder::Hex_Encoder(bool breaks, size_t length, Case c) :
+   m_casing(c), m_line_length(breaks ? length : 0)
+   {
+   m_in.resize(HEX_CODEC_BUFFER_SIZE);
+   m_out.resize(2*m_in.size());
+   m_counter = m_position = 0;
+   }
+
+/*
+* Hex_Encoder Constructor
+*/
+Hex_Encoder::Hex_Encoder(Case c) : m_casing(c), m_line_length(0)
+   {
+   m_in.resize(HEX_CODEC_BUFFER_SIZE);
+   m_out.resize(2*m_in.size());
+   m_counter = m_position = 0;
+   }
+
+/*
+* Encode and send a block
+*/
+void Hex_Encoder::encode_and_send(const uint8_t block[], size_t length)
+   {
+   hex_encode(cast_uint8_ptr_to_char(m_out.data()),
+              block, length,
+              m_casing == Uppercase);
+
+   if(m_line_length == 0)
+      send(m_out, 2*length);
+   else
+      {
+      size_t remaining = 2*length, offset = 0;
+      while(remaining)
+         {
+         size_t sent = std::min(m_line_length - m_counter, remaining);
+         send(&m_out[offset], sent);
+         m_counter += sent;
+         remaining -= sent;
+         offset += sent;
+         if(m_counter == m_line_length)
+            {
+            send('\n');
+            m_counter = 0;
+            }
+         }
+      }
+   }
+
+/*
+* Convert some data into hex format
+*/
+void Hex_Encoder::write(const uint8_t input[], size_t length)
+   {
+   buffer_insert(m_in, m_position, input, length);
+   if(m_position + length >= m_in.size())
+      {
+      encode_and_send(m_in.data(), m_in.size());
+      input += (m_in.size() - m_position);
+      length -= (m_in.size() - m_position);
+      while(length >= m_in.size())
+         {
+         encode_and_send(input, m_in.size());
+         input += m_in.size();
+         length -= m_in.size();
+         }
+      copy_mem(m_in.data(), input, length);
+      m_position = 0;
+      }
+   m_position += length;
+   }
+
+/*
+* Flush buffers
+*/
+void Hex_Encoder::end_msg()
+   {
+   encode_and_send(m_in.data(), m_position);
+   if(m_counter && m_line_length)
+      send('\n');
+   m_counter = m_position = 0;
+   }
+
+/*
+* Hex_Decoder Constructor
+*/
+Hex_Decoder::Hex_Decoder(Decoder_Checking c) : m_checking(c)
+   {
+   m_in.resize(HEX_CODEC_BUFFER_SIZE);
+   m_out.resize(m_in.size() / 2);
+   m_position = 0;
+   }
+
+/*
+* Convert some data from hex format
+*/
+void Hex_Decoder::write(const uint8_t input[], size_t length)
+   {
+   while(length)
+      {
+      size_t to_copy = std::min<size_t>(length, m_in.size() - m_position);
+      copy_mem(&m_in[m_position], input, to_copy);
+      m_position += to_copy;
+
+      size_t consumed = 0;
+      size_t written = hex_decode(m_out.data(),
+                                  cast_uint8_ptr_to_char(m_in.data()),
+                                  m_position,
+                                  consumed,
+                                  m_checking != FULL_CHECK);
+
+      send(m_out, written);
+
+      if(consumed != m_position)
+         {
+         copy_mem(m_in.data(), m_in.data() + consumed, m_position - consumed);
+         m_position = m_position - consumed;
+         }
+      else
+         m_position = 0;
+
+      length -= to_copy;
+      input += to_copy;
+      }
+   }
+
+/*
+* Flush buffers
+*/
+void Hex_Decoder::end_msg()
+   {
+   size_t consumed = 0;
+   size_t written = hex_decode(m_out.data(),
+                               cast_uint8_ptr_to_char(m_in.data()),
+                               m_position,
+                               consumed,
+                               m_checking != FULL_CHECK);
+
+   send(m_out, written);
+
+   const bool not_full_bytes = consumed != m_position;
+
+   m_position = 0;
+
+   if(not_full_bytes)
+      throw Invalid_Argument("Hex_Decoder: Input not full bytes");
+   }
+
+}