1 files changed, 182 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/filters/b64_filt.cpp b/comm/third_party/botan/src/lib/filters/b64_filt.cpp
new file mode 100644
index 0000000000..8cbba1a6e5
--- /dev/null
+++ b/comm/third_party/botan/src/lib/filters/b64_filt.cpp
@@ -0,0 +1,182 @@
+/*
+* Base64 Encoder/Decoder
+* (C) 1999-2010 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/filters.h>
+#include <botan/base64.h>
+#include <botan/exceptn.h>
+#include <algorithm>
+
+namespace Botan {
+
+/*
+* Base64_Encoder Constructor
+*/
+Base64_Encoder::Base64_Encoder(bool breaks, size_t length, bool t_n) :
+   m_line_length(breaks ? length : 0),
+   m_trailing_newline(t_n && breaks),
+   m_in(48),
+   m_out(64),
+   m_position(0),
+   m_out_position(0)
+   {
+   }
+
+/*
+* Encode and send a block
+*/
+void Base64_Encoder::encode_and_send(const uint8_t input[], size_t length,
+                                     bool final_inputs)
+   {
+   while(length)
+      {
+      const size_t proc = std::min(length, m_in.size());
+
+      size_t consumed = 0;
+      size_t produced = base64_encode(cast_uint8_ptr_to_char(m_out.data()),
+                                      input, proc, consumed, final_inputs);
+
+      do_output(m_out.data(), produced);
+
+      // FIXME: s/proc/consumed/?
+      input += proc;
+      length -= proc;
+      }
+   }
+
+/*
+* Handle the output
+*/
+void Base64_Encoder::do_output(const uint8_t input[], size_t length)
+   {
+   if(m_line_length == 0)
+      send(input, length);
+   else
+      {
+      size_t remaining = length, offset = 0;
+      while(remaining)
+         {
+         size_t sent = std::min(m_line_length - m_out_position, remaining);
+         send(input + offset, sent);
+         m_out_position += sent;
+         remaining -= sent;
+         offset += sent;
+         if(m_out_position == m_line_length)
+            {
+            send('\n');
+            m_out_position = 0;
+            }
+         }
+      }
+   }
+
+/*
+* Convert some data into Base64
+*/
+void Base64_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 Base64_Encoder::end_msg()
+   {
+   encode_and_send(m_in.data(), m_position, true);
+
+   if(m_trailing_newline || (m_out_position && m_line_length))
+      send('\n');
+
+   m_out_position = m_position = 0;
+   }
+
+/*
+* Base64_Decoder Constructor
+*/
+Base64_Decoder::Base64_Decoder(Decoder_Checking c) :
+   m_checking(c), m_in(64), m_out(48), m_position(0)
+   {
+   }
+
+/*
+* Convert some data from Base64
+*/
+void Base64_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);
+      if(to_copy == 0)
+         {
+         m_in.resize(m_in.size()*2);
+         m_out.resize(m_out.size()*2);
+         }
+      copy_mem(&m_in[m_position], input, to_copy);
+      m_position += to_copy;
+
+      size_t consumed = 0;
+      size_t written = base64_decode(m_out.data(),
+                                     cast_uint8_ptr_to_char(m_in.data()),
+                                     m_position,
+                                     consumed,
+                                     false,
+                                     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 Base64_Decoder::end_msg()
+   {
+   size_t consumed = 0;
+   size_t written = base64_decode(m_out.data(),
+                                  cast_uint8_ptr_to_char(m_in.data()),
+                                  m_position,
+                                  consumed,
+                                  true,
+                                  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("Base64_Decoder: Input not full bytes");
+   }
+
+}