SSH: Use OpenSSH tools

... instead of our own SSH library.

Advantages:
    - Full compatibility with OpenSSH behavior guaranteed.
    - Minimal maintenance effort.
    - Less code to build.
    - Big chunk of 3rd party sources can be removed from our repository.

One the downside, Windows users now need to install OpenSSH for
RemoteLinux support. Hoewever, people doing embedded development
probably have it installed anyway.

[ChangeLog] Switched SSH backend to OpenSSH

Fixes: QTCREATORBUG-15744
Fixes: QTCREATORBUG-15807
Fixes: QTCREATORBUG-19306
Fixes: QTCREATORBUG-20210
Change-Id: Ifcfefdd39401e45ba1f4aca35d2c5bf7046c7aab
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 0 insertions, 203 deletions

diff --git a/src/libs/3rdparty/botan/src/lib/modes/mode_pad/mode_pad.cpp b/src/libs/3rdparty/botan/src/lib/modes/mode_pad/mode_pad.cpp
deleted file mode 100644
index e65114c8808..00000000000
--- a/src/libs/3rdparty/botan/src/lib/modes/mode_pad/mode_pad.cpp
+++ /dev/null
@@ -1,203 +0,0 @@
-/*
-* CBC Padding Methods
-* (C) 1999-2007,2013,2018 Jack Lloyd
-* (C) 2016 René Korthaus, Rohde & Schwarz Cybersecurity
-*
-* Botan is released under the Simplified BSD License (see license.txt)
-*/
-
-#include <botan/mode_pad.h>
-#include <botan/exceptn.h>
-#include <botan/internal/ct_utils.h>
-
-namespace Botan {
-
-/**
-* Get a block cipher padding method by name
-*/
-BlockCipherModePaddingMethod* get_bc_pad(const std::string& algo_spec)
-   {
-   if(algo_spec == "NoPadding")
-      return new Null_Padding;
-
-   if(algo_spec == "PKCS7")
-      return new PKCS7_Padding;
-
-   if(algo_spec == "OneAndZeros")
-      return new OneAndZeros_Padding;
-
-   if(algo_spec == "X9.23")
-      return new ANSI_X923_Padding;
-
-   if(algo_spec == "ESP")
-      return new ESP_Padding;
-
-   return nullptr;
-   }
-
-/*
-* Pad with PKCS #7 Method
-*/
-void PKCS7_Padding::add_padding(secure_vector<uint8_t>& buffer,
-                                size_t last_byte_pos,
-                                size_t block_size) const
-   {
-   const uint8_t pad_value = static_cast<uint8_t>(block_size - last_byte_pos);
-
-   for(size_t i = 0; i != pad_value; ++i)
-      buffer.push_back(pad_value);
-   }
-
-/*
-* Unpad with PKCS #7 Method
-*/
-size_t PKCS7_Padding::unpad(const uint8_t input[], size_t input_length) const
-   {
-   if(input_length <= 2)
-      return input_length;
-
-   CT::poison(input, input_length);
-   size_t bad_input = 0;
-   const uint8_t last_byte = input[input_length-1];
-
-   bad_input |= CT::expand_mask<size_t>(last_byte > input_length);
-
-   const size_t pad_pos = input_length - last_byte;
-
-   for(size_t i = 0; i != input_length - 1; ++i)
-      {
-      const uint8_t in_range = CT::expand_mask<uint8_t>(i >= pad_pos);
-      bad_input |= in_range & (~CT::is_equal(input[i], last_byte));
-      }
-
-   CT::unpoison(input, input_length);
-   return CT::conditional_return(bad_input, input_length, pad_pos);
-   }
-
-/*
-* Pad with ANSI X9.23 Method
-*/
-void ANSI_X923_Padding::add_padding(secure_vector<uint8_t>& buffer,
-                                    size_t last_byte_pos,
-                                    size_t block_size) const
-   {
-   const uint8_t pad_value = static_cast<uint8_t>(block_size - last_byte_pos);
-
-   for(size_t i = last_byte_pos; i < block_size-1; ++i)
-      {
-      buffer.push_back(0);
-      }
-   buffer.push_back(pad_value);
-   }
-
-/*
-* Unpad with ANSI X9.23 Method
-*/
-size_t ANSI_X923_Padding::unpad(const uint8_t input[], size_t input_length) const
-   {
-   if(input_length <= 2)
-      return input_length;
-
-   CT::poison(input, input_length);
-   const size_t last_byte = input[input_length-1];
-
-   uint8_t bad_input = 0;
-   bad_input |= CT::expand_mask<uint8_t>(last_byte > input_length);
-
-   const size_t pad_pos = input_length - last_byte;
-
-   for(size_t i = 0; i != input_length - 1; ++i)
-      {
-      const uint8_t in_range = CT::expand_mask<uint8_t>(i >= pad_pos);
-      bad_input |= CT::expand_mask(input[i]) & in_range;
-      }
-
-   CT::unpoison(input, input_length);
-   return CT::conditional_return(bad_input, input_length, pad_pos);
-   }
-
-/*
-* Pad with One and Zeros Method
-*/
-void OneAndZeros_Padding::add_padding(secure_vector<uint8_t>& buffer,
-                                      size_t last_byte_pos,
-                                      size_t block_size) const
-   {
-   buffer.push_back(0x80);
-
-   for(size_t i = last_byte_pos + 1; i % block_size; ++i)
-      buffer.push_back(0x00);
-   }
-
-/*
-* Unpad with One and Zeros Method
-*/
-size_t OneAndZeros_Padding::unpad(const uint8_t input[], size_t input_length) const
-   {
-   if(input_length <= 2)
-      return input_length;
-
-   CT::poison(input, input_length);
-
-   uint8_t bad_input = 0;
-   uint8_t seen_one = 0;
-   size_t pad_pos = input_length - 1;
-   size_t i = input_length;
-
-   while(i)
-      {
-      seen_one |= CT::is_equal<uint8_t>(input[i-1], 0x80);
-      pad_pos -= CT::select<uint8_t>(~seen_one, 1, 0);
-      bad_input |= ~CT::is_zero<uint8_t>(input[i-1]) & ~seen_one;
-      i--;
-      }
-   bad_input |= ~seen_one;
-
-   CT::unpoison(input, input_length);
-   return CT::conditional_return(bad_input, input_length, pad_pos);
-   }
-
-/*
-* Pad with ESP Padding Method
-*/
-void ESP_Padding::add_padding(secure_vector<uint8_t>& buffer,
-                              size_t last_byte_pos,
-                              size_t block_size) const
-   {
-   uint8_t pad_value = 0x01;
-
-   for(size_t i = last_byte_pos; i < block_size; ++i)
-      {
-      buffer.push_back(pad_value++);
-      }
-   }
-
-/*
-* Unpad with ESP Padding Method
-*/
-size_t ESP_Padding::unpad(const uint8_t input[], size_t input_length) const
-   {
-   if(input_length <= 2)
-      return input_length;
-
-   CT::poison(input, input_length);
-
-   const size_t last_byte = input[input_length-1];
-   uint8_t bad_input = 0;
-   bad_input |= CT::is_zero(last_byte) | CT::expand_mask<uint8_t>(last_byte > input_length);
-
-   const size_t pad_pos = input_length - last_byte;
-   size_t i = input_length - 1;
-   while(i)
-      {
-      const uint8_t in_range = CT::expand_mask<uint8_t>(i > pad_pos);
-      bad_input |= (~CT::is_equal<uint8_t>(input[i-1], input[i]-1)) & in_range;
-      --i;
-      }
-
-   CT::unpoison(input, input_length);
-   return CT::conditional_return(bad_input, input_length, pad_pos);
-   }
-
-
-}