1 files changed, 405 insertions, 0 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/asn1/der_enc.cpp b/src/libs/3rdparty/botan/src/lib/asn1/der_enc.cpp
new file mode 100644
index 0000000000..99b833d27d
--- /dev/null
+++ b/src/libs/3rdparty/botan/src/lib/asn1/der_enc.cpp
@@ -0,0 +1,405 @@
+/*
+* DER Encoder
+* (C) 1999-2007,2018 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/der_enc.h>
+#include <botan/asn1_obj.h>
+#include <botan/bigint.h>
+#include <botan/loadstor.h>
+#include <botan/internal/bit_ops.h>
+#include <algorithm>
+
+namespace Botan {
+
+namespace {
+
+/*
+* DER encode an ASN.1 type tag
+*/
+void encode_tag(std::vector<uint8_t>& encoded_tag,
+                ASN1_Tag type_tag, ASN1_Tag class_tag)
+   {
+   if((class_tag | 0xE0) != 0xE0)
+      throw Encoding_Error("DER_Encoder: Invalid class tag " +
+                           std::to_string(class_tag));
+
+   if(type_tag <= 30)
+      {
+      encoded_tag.push_back(static_cast<uint8_t>(type_tag | class_tag));
+      }
+   else
+      {
+      size_t blocks = high_bit(type_tag) + 6;
+      blocks = (blocks - (blocks % 7)) / 7;
+
+      BOTAN_ASSERT_NOMSG(blocks > 0);
+
+      encoded_tag.push_back(static_cast<uint8_t>(class_tag | 0x1F));
+      for(size_t i = 0; i != blocks - 1; ++i)
+         encoded_tag.push_back(0x80 | ((type_tag >> 7*(blocks-i-1)) & 0x7F));
+      encoded_tag.push_back(type_tag & 0x7F);
+      }
+   }
+
+/*
+* DER encode an ASN.1 length field
+*/
+void encode_length(std::vector<uint8_t>& encoded_length, size_t length)
+   {
+   if(length <= 127)
+      {
+      encoded_length.push_back(static_cast<uint8_t>(length));
+      }
+   else
+      {
+      const size_t bytes_needed = significant_bytes(length);
+
+      encoded_length.push_back(static_cast<uint8_t>(0x80 | bytes_needed));
+
+      for(size_t i = sizeof(length) - bytes_needed; i < sizeof(length); ++i)
+         encoded_length.push_back(get_byte(i, length));
+      }
+   }
+
+}
+
+DER_Encoder::DER_Encoder(secure_vector<uint8_t>& vec)
+   {
+   m_append_output = [&vec](const uint8_t b[], size_t l)
+      {
+      vec.insert(vec.end(), b, b + l);
+      };
+   }
+
+DER_Encoder::DER_Encoder(std::vector<uint8_t>& vec)
+   {
+   m_append_output = [&vec](const uint8_t b[], size_t l)
+      {
+      vec.insert(vec.end(), b, b + l);
+      };
+   }
+
+/*
+* Push the encoded SEQUENCE/SET to the encoder stream
+*/
+void DER_Encoder::DER_Sequence::push_contents(DER_Encoder& der)
+   {
+   const ASN1_Tag real_class_tag = ASN1_Tag(m_class_tag | CONSTRUCTED);
+
+   if(m_type_tag == SET)
+      {
+      std::sort(m_set_contents.begin(), m_set_contents.end());
+      for(size_t i = 0; i != m_set_contents.size(); ++i)
+         m_contents += m_set_contents[i];
+      m_set_contents.clear();
+      }
+
+   der.add_object(m_type_tag, real_class_tag, m_contents.data(), m_contents.size());
+   m_contents.clear();
+   }
+
+/*
+* Add an encoded value to the SEQUENCE/SET
+*/
+void DER_Encoder::DER_Sequence::add_bytes(const uint8_t data[], size_t length)
+   {
+   if(m_type_tag == SET)
+      m_set_contents.push_back(secure_vector<uint8_t>(data, data + length));
+   else
+      m_contents += std::make_pair(data, length);
+   }
+
+void DER_Encoder::DER_Sequence::add_bytes(const uint8_t hdr[], size_t hdr_len,
+                                          const uint8_t val[], size_t val_len)
+   {
+   if(m_type_tag == SET)
+      {
+      secure_vector<uint8_t> m;
+      m.reserve(hdr_len + val_len);
+      m += std::make_pair(hdr, hdr_len);
+      m += std::make_pair(val, val_len);
+      m_set_contents.push_back(std::move(m));
+      }
+   else
+      {
+      m_contents += std::make_pair(hdr, hdr_len);
+      m_contents += std::make_pair(val, val_len);
+      }
+   }
+
+/*
+* Return the type and class taggings
+*/
+ASN1_Tag DER_Encoder::DER_Sequence::tag_of() const
+   {
+   return ASN1_Tag(m_type_tag | m_class_tag);
+   }
+
+/*
+* DER_Sequence Constructor
+*/
+DER_Encoder::DER_Sequence::DER_Sequence(ASN1_Tag t1, ASN1_Tag t2) :
+   m_type_tag(t1), m_class_tag(t2)
+   {
+   }
+
+/*
+* Return the encoded contents
+*/
+secure_vector<uint8_t> DER_Encoder::get_contents()
+   {
+   if(m_subsequences.size() != 0)
+      throw Invalid_State("DER_Encoder: Sequence hasn't been marked done");
+
+   if(m_append_output)
+      throw Invalid_State("DER_Encoder Cannot get contents when using output vector");
+
+   secure_vector<uint8_t> output;
+   std::swap(output, m_default_outbuf);
+   return output;
+   }
+
+std::vector<uint8_t> DER_Encoder::get_contents_unlocked()
+   {
+   if(m_subsequences.size() != 0)
+      throw Invalid_State("DER_Encoder: Sequence hasn't been marked done");
+
+   if(m_append_output)
+      throw Invalid_State("DER_Encoder Cannot get contents when using output vector");
+
+   std::vector<uint8_t> output(m_default_outbuf.begin(), m_default_outbuf.end());
+   m_default_outbuf.clear();
+   return output;
+   }
+
+/*
+* Start a new ASN.1 SEQUENCE/SET/EXPLICIT
+*/
+DER_Encoder& DER_Encoder::start_cons(ASN1_Tag type_tag,
+                                     ASN1_Tag class_tag)
+   {
+   m_subsequences.push_back(DER_Sequence(type_tag, class_tag));
+   return (*this);
+   }
+
+/*
+* Finish the current ASN.1 SEQUENCE/SET/EXPLICIT
+*/
+DER_Encoder& DER_Encoder::end_cons()
+   {
+   if(m_subsequences.empty())
+      throw Invalid_State("DER_Encoder::end_cons: No such sequence");
+
+   DER_Sequence last_seq = std::move(m_subsequences[m_subsequences.size()-1]);
+   m_subsequences.pop_back();
+   last_seq.push_contents(*this);
+
+   return (*this);
+   }
+
+/*
+* Start a new ASN.1 EXPLICIT encoding
+*/
+DER_Encoder& DER_Encoder::start_explicit(uint16_t type_no)
+   {
+   ASN1_Tag type_tag = static_cast<ASN1_Tag>(type_no);
+
+   // This would confuse DER_Sequence
+   if(type_tag == SET)
+      throw Internal_Error("DER_Encoder.start_explicit(SET) not supported");
+
+   return start_cons(type_tag, CONTEXT_SPECIFIC);
+   }
+
+/*
+* Finish the current ASN.1 EXPLICIT encoding
+*/
+DER_Encoder& DER_Encoder::end_explicit()
+   {
+   return end_cons();
+   }
+
+/*
+* Write raw bytes into the stream
+*/
+DER_Encoder& DER_Encoder::raw_bytes(const uint8_t bytes[], size_t length)
+   {
+   if(m_subsequences.size())
+      {
+      m_subsequences[m_subsequences.size()-1].add_bytes(bytes, length);
+      }
+   else if(m_append_output)
+      {
+      m_append_output(bytes, length);
+      }
+   else
+      {
+      m_default_outbuf += std::make_pair(bytes, length);
+      }
+
+   return (*this);
+   }
+
+/*
+* Write the encoding of the byte(s)
+*/
+DER_Encoder& DER_Encoder::add_object(ASN1_Tag type_tag, ASN1_Tag class_tag,
+                                     const uint8_t rep[], size_t length)
+   {
+   std::vector<uint8_t> hdr;
+   encode_tag(hdr, type_tag, class_tag);
+   encode_length(hdr, length);
+
+   if(m_subsequences.size())
+      {
+      m_subsequences[m_subsequences.size()-1].add_bytes(hdr.data(), hdr.size(), rep, length);
+      }
+   else if(m_append_output)
+      {
+      m_append_output(hdr.data(), hdr.size());
+      m_append_output(rep, length);
+      }
+   else
+      {
+      m_default_outbuf += hdr;
+      m_default_outbuf += std::make_pair(rep, length);
+      }
+
+   return (*this);
+   }
+
+/*
+* Encode a NULL object
+*/
+DER_Encoder& DER_Encoder::encode_null()
+   {
+   return add_object(NULL_TAG, UNIVERSAL, nullptr, 0);
+   }
+
+/*
+* DER encode a BOOLEAN
+*/
+DER_Encoder& DER_Encoder::encode(bool is_true)
+   {
+   return encode(is_true, BOOLEAN, UNIVERSAL);
+   }
+
+/*
+* DER encode a small INTEGER
+*/
+DER_Encoder& DER_Encoder::encode(size_t n)
+   {
+   return encode(BigInt(n), INTEGER, UNIVERSAL);
+   }
+
+/*
+* DER encode a small INTEGER
+*/
+DER_Encoder& DER_Encoder::encode(const BigInt& n)
+   {
+   return encode(n, INTEGER, UNIVERSAL);
+   }
+
+/*
+* Encode this object
+*/
+DER_Encoder& DER_Encoder::encode(const uint8_t bytes[], size_t length,
+                                 ASN1_Tag real_type)
+   {
+   return encode(bytes, length, real_type, real_type, UNIVERSAL);
+   }
+
+/*
+* DER encode a BOOLEAN
+*/
+DER_Encoder& DER_Encoder::encode(bool is_true,
+                                 ASN1_Tag type_tag, ASN1_Tag class_tag)
+   {
+   uint8_t val = is_true ? 0xFF : 0x00;
+   return add_object(type_tag, class_tag, &val, 1);
+   }
+
+/*
+* DER encode a small INTEGER
+*/
+DER_Encoder& DER_Encoder::encode(size_t n,
+                                 ASN1_Tag type_tag, ASN1_Tag class_tag)
+   {
+   return encode(BigInt(n), type_tag, class_tag);
+   }
+
+/*
+* DER encode an INTEGER
+*/
+DER_Encoder& DER_Encoder::encode(const BigInt& n,
+                                 ASN1_Tag type_tag, ASN1_Tag class_tag)
+   {
+   if(n == 0)
+      return add_object(type_tag, class_tag, 0);
+
+   const size_t extra_zero = (n.bits() % 8 == 0) ? 1 : 0;
+   secure_vector<uint8_t> contents(extra_zero + n.bytes());
+   BigInt::encode(&contents[extra_zero], n);
+   if(n < 0)
+      {
+      for(size_t i = 0; i != contents.size(); ++i)
+         contents[i] = ~contents[i];
+      for(size_t i = contents.size(); i > 0; --i)
+         if(++contents[i-1])
+            break;
+      }
+
+   return add_object(type_tag, class_tag, contents);
+   }
+
+/*
+* DER encode an OCTET STRING or BIT STRING
+*/
+DER_Encoder& DER_Encoder::encode(const uint8_t bytes[], size_t length,
+                                 ASN1_Tag real_type,
+                                 ASN1_Tag type_tag, ASN1_Tag class_tag)
+   {
+   if(real_type != OCTET_STRING && real_type != BIT_STRING)
+      throw Invalid_Argument("DER_Encoder: Invalid tag for byte/bit string");
+
+   if(real_type == BIT_STRING)
+      {
+      secure_vector<uint8_t> encoded;
+      encoded.push_back(0);
+      encoded += std::make_pair(bytes, length);
+      return add_object(type_tag, class_tag, encoded);
+      }
+   else
+      return add_object(type_tag, class_tag, bytes, length);
+   }
+
+DER_Encoder& DER_Encoder::encode(const ASN1_Object& obj)
+   {
+   obj.encode_into(*this);
+   return (*this);
+   }
+
+/*
+* Write the encoding of the byte(s)
+*/
+DER_Encoder& DER_Encoder::add_object(ASN1_Tag type_tag, ASN1_Tag class_tag,
+                                     const std::string& rep_str)
+   {
+   const uint8_t* rep = cast_char_ptr_to_uint8(rep_str.data());
+   const size_t rep_len = rep_str.size();
+   return add_object(type_tag, class_tag, rep, rep_len);
+   }
+
+/*
+* Write the encoding of the byte
+*/
+DER_Encoder& DER_Encoder::add_object(ASN1_Tag type_tag,
+                                     ASN1_Tag class_tag, uint8_t rep)
+   {
+   return add_object(type_tag, class_tag, &rep, 1);
+   }
+
+}