Coverage Report

Created: 2020-05-23 13:54

/src/botan/build/include/botan/internal/tls_reader.h
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1
/*
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* TLS Data Reader
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* (C) 2010-2011,2014 Jack Lloyd
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*
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* Botan is released under the Simplified BSD License (see license.txt)
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*/
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8
#ifndef BOTAN_TLS_READER_H_
9
#define BOTAN_TLS_READER_H_
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#include <botan/exceptn.h>
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#include <botan/secmem.h>
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#include <botan/loadstor.h>
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#include <string>
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#include <vector>
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17
namespace Botan {
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19
namespace TLS {
20
21
/**
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* Helper class for decoding TLS protocol messages
23
*/
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class TLS_Data_Reader final
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   {
26
   public:
27
      TLS_Data_Reader(const char* type, const std::vector<uint8_t>& buf_in) :
28
50.7k
         m_typename(type), m_buf(buf_in), m_offset(0) {}
29
30
      void assert_done() const
31
13.3k
         {
32
13.3k
         if(has_remaining())
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111
            throw decode_error("Extra bytes at end of message");
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13.3k
         }
35
36
566
      size_t read_so_far() const { return m_offset; }
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38
308k
      size_t remaining_bytes() const { return m_buf.size() - m_offset; }
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40
273k
      bool has_remaining() const { return (remaining_bytes() > 0); }
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      std::vector<uint8_t> get_remaining()
43
0
         {
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0
         return std::vector<uint8_t>(m_buf.begin() + m_offset, m_buf.end());
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0
         }
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47
      void discard_next(size_t bytes)
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1.01k
         {
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1.01k
         assert_at_least(bytes);
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1.01k
         m_offset += bytes;
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1.01k
         }
52
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      uint32_t get_uint32_t()
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5
         {
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5
         assert_at_least(4);
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5
         uint32_t result = make_uint32(m_buf[m_offset  ], m_buf[m_offset+1],
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5
                                     m_buf[m_offset+2], m_buf[m_offset+3]);
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5
         m_offset += 4;
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5
         return result;
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5
         }
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62
      uint16_t get_uint16_t()
63
633k
         {
64
633k
         assert_at_least(2);
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633k
         uint16_t result = make_uint16(m_buf[m_offset], m_buf[m_offset+1]);
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633k
         m_offset += 2;
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633k
         return result;
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633k
         }
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      uint8_t get_byte()
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203k
         {
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203k
         assert_at_least(1);
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203k
         uint8_t result = m_buf[m_offset];
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203k
         m_offset += 1;
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203k
         return result;
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203k
         }
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      template<typename T, typename Container>
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      Container get_elem(size_t num_elems)
80
343k
         {
81
343k
         assert_at_least(num_elems * sizeof(T));
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343k
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343k
         Container result(num_elems);
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343k
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2.91M
         for(size_t i = 0; i != num_elems; ++i)
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2.57M
            result[i] = load_be<T>(&m_buf[m_offset], i);
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343k
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343k
         m_offset += num_elems * sizeof(T);
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343k
90
343k
         return result;
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         }
std::__1::vector<unsigned char, std::__1::allocator<unsigned char> > Botan::TLS::TLS_Data_Reader::get_elem<unsigned char, std::__1::vector<unsigned char, std::__1::allocator<unsigned char> > >(unsigned long)
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Source
80
311k
         {
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311k
         assert_at_least(num_elems * sizeof(T));
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311k
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311k
         Container result(num_elems);
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311k
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2.80M
         for(size_t i = 0; i != num_elems; ++i)
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2.49M
            result[i] = load_be<T>(&m_buf[m_offset], i);
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311k
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311k
         m_offset += num_elems * sizeof(T);
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311k
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311k
         return result;
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311k
         }
std::__1::vector<unsigned short, std::__1::allocator<unsigned short> > Botan::TLS::TLS_Data_Reader::get_elem<unsigned short, std::__1::vector<unsigned short, std::__1::allocator<unsigned short> > >(unsigned long)
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80
31.6k
         {
81
31.6k
         assert_at_least(num_elems * sizeof(T));
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31.6k
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31.6k
         Container result(num_elems);
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31.6k
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112k
         for(size_t i = 0; i != num_elems; ++i)
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80.4k
            result[i] = load_be<T>(&m_buf[m_offset], i);
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31.6k
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31.6k
         m_offset += num_elems * sizeof(T);
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31.6k
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31.6k
         return result;
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         }
92
93
      template<typename T>
94
      std::vector<T> get_range(size_t len_bytes,
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                               size_t min_elems,
96
                               size_t max_elems)
97
62.4k
         {
98
62.4k
         const size_t num_elems =
99
62.4k
            get_num_elems(len_bytes, sizeof(T), min_elems, max_elems);
100
62.4k
101
62.4k
         return get_elem<T, std::vector<T>>(num_elems);
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62.4k
         }
std::__1::vector<unsigned char, std::__1::allocator<unsigned char> > Botan::TLS::TLS_Data_Reader::get_range<unsigned char>(unsigned long, unsigned long, unsigned long)
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62.2k
         {
98
62.2k
         const size_t num_elems =
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62.2k
            get_num_elems(len_bytes, sizeof(T), min_elems, max_elems);
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62.2k
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62.2k
         return get_elem<T, std::vector<T>>(num_elems);
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         }
std::__1::vector<unsigned short, std::__1::allocator<unsigned short> > Botan::TLS::TLS_Data_Reader::get_range<unsigned short>(unsigned long, unsigned long, unsigned long)
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Source
97
226
         {
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         const size_t num_elems =
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            get_num_elems(len_bytes, sizeof(T), min_elems, max_elems);
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226
         return get_elem<T, std::vector<T>>(num_elems);
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         }
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      template<typename T>
105
      std::vector<T> get_range_vector(size_t len_bytes,
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                                      size_t min_elems,
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                                      size_t max_elems)
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107k
         {
109
107k
         const size_t num_elems =
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            get_num_elems(len_bytes, sizeof(T), min_elems, max_elems);
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107k
         return get_elem<T, std::vector<T>>(num_elems);
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         }
std::__1::vector<unsigned char, std::__1::allocator<unsigned char> > Botan::TLS::TLS_Data_Reader::get_range_vector<unsigned char>(unsigned long, unsigned long, unsigned long)
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108
76.0k
         {
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76.0k
         const size_t num_elems =
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            get_num_elems(len_bytes, sizeof(T), min_elems, max_elems);
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76.0k
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76.0k
         return get_elem<T, std::vector<T>>(num_elems);
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         }
std::__1::vector<unsigned short, std::__1::allocator<unsigned short> > Botan::TLS::TLS_Data_Reader::get_range_vector<unsigned short>(unsigned long, unsigned long, unsigned long)
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108
31.4k
         {
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31.4k
         const size_t num_elems =
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            get_num_elems(len_bytes, sizeof(T), min_elems, max_elems);
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31.4k
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31.4k
         return get_elem<T, std::vector<T>>(num_elems);
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         }
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      std::string get_string(size_t len_bytes,
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                             size_t min_bytes,
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                             size_t max_bytes)
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44.3k
         {
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44.3k
         std::vector<uint8_t> v =
120
44.3k
            get_range_vector<uint8_t>(len_bytes, min_bytes, max_bytes);
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44.3k
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44.3k
         return std::string(cast_uint8_ptr_to_char(v.data()), v.size());
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         }
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      template<typename T>
126
      std::vector<T> get_fixed(size_t size)
127
171k
         {
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         return get_elem<T, std::vector<T>>(size);
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         }
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   private:
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      size_t get_length_field(size_t len_bytes)
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170k
         {
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170k
         assert_at_least(len_bytes);
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170k
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170k
         if(len_bytes == 1)
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120k
            return get_byte();
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49.9k
         else if(len_bytes == 2)
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49.7k
            return get_uint16_t();
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         throw decode_error("Bad length size");
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         }
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      size_t get_num_elems(size_t len_bytes,
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                           size_t T_size,
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                           size_t min_elems,
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                           size_t max_elems)
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170k
         {
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170k
         const size_t byte_length = get_length_field(len_bytes);
150
170k
151
170k
         if(byte_length % T_size != 0)
152
23
            throw decode_error("Size isn't multiple of T");
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170k
         const size_t num_elems = byte_length / T_size;
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170k
         if(num_elems < min_elems || num_elems > max_elems)
157
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            throw decode_error("Length field outside parameters");
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169k
         return num_elems;
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         }
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      void assert_at_least(size_t n) const
163
1.35M
         {
164
1.35M
         if(m_buf.size() - m_offset < n)
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1.20k
            throw decode_error("Expected " + std::to_string(n) +
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1.20k
                               " bytes remaining, only " +
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1.20k
                               std::to_string(m_buf.size()-m_offset) +
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1.20k
                               " left");
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         }
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      Decoding_Error decode_error(const std::string& why) const
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1.44k
         {
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         return Decoding_Error("Invalid " + std::string(m_typename) + ": " + why);
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         }
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      const char* m_typename;
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      const std::vector<uint8_t>& m_buf;
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      size_t m_offset;
179
   };
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/**
182
* Helper function for encoding length-tagged vectors
183
*/
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template<typename T, typename Alloc>
185
void append_tls_length_value(std::vector<uint8_t, Alloc>& buf,
186
                             const T* vals,
187
                             size_t vals_size,
188
                             size_t tag_size)
189
153k
   {
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153k
   const size_t T_size = sizeof(T);
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153k
   const size_t val_bytes = T_size * vals_size;
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153k
193
153k
   if(tag_size != 1 && tag_size != 2)
194
0
      throw Invalid_Argument("append_tls_length_value: invalid tag size");
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153k
196
153k
   if((tag_size == 1 && val_bytes > 255) ||
197
153k
      (tag_size == 2 && val_bytes > 65535))
198
0
      throw Invalid_Argument("append_tls_length_value: value too large");
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153k
200
381k
   for(size_t i = 0; i != tag_size; ++i)
201
228k
      buf.push_back(get_byte(sizeof(val_bytes)-tag_size+i, val_bytes));
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153k
203
9.27M
   for(size_t i = 0; i != vals_size; ++i)
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19.1M
      for(size_t j = 0; j != T_size; ++j)
205
10.0M
         buf.push_back(get_byte(j, vals[i]));
206
153k
   }
void Botan::TLS::append_tls_length_value<unsigned char, std::__1::allocator<unsigned char> >(std::__1::vector<unsigned char, std::__1::allocator<unsigned char> >&, unsigned char const*, unsigned long, unsigned long)
Line
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Source
189
116k
   {
190
116k
   const size_t T_size = sizeof(T);
191
116k
   const size_t val_bytes = T_size * vals_size;
192
116k
193
116k
   if(tag_size != 1 && tag_size != 2)
194
0
      throw Invalid_Argument("append_tls_length_value: invalid tag size");
195
116k
196
116k
   if((tag_size == 1 && val_bytes > 255) ||
197
116k
      (tag_size == 2 && val_bytes > 65535))
198
0
      throw Invalid_Argument("append_tls_length_value: value too large");
199
116k
200
270k
   for(size_t i = 0; i != tag_size; ++i)
201
154k
      buf.push_back(get_byte(sizeof(val_bytes)-tag_size+i, val_bytes));
202
116k
203
6.97M
   for(size_t i = 0; i != vals_size; ++i)
204
13.7M
      for(size_t j = 0; j != T_size; ++j)
205
6.85M
         buf.push_back(get_byte(j, vals[i]));
206
116k
   }
void Botan::TLS::append_tls_length_value<unsigned short, std::__1::allocator<unsigned char> >(std::__1::vector<unsigned char, std::__1::allocator<unsigned char> >&, unsigned short const*, unsigned long, unsigned long)
Line
Count
Source
189
11.9k
   {
190
11.9k
   const size_t T_size = sizeof(T);
191
11.9k
   const size_t val_bytes = T_size * vals_size;
192
11.9k
193
11.9k
   if(tag_size != 1 && tag_size != 2)
194
0
      throw Invalid_Argument("append_tls_length_value: invalid tag size");
195
11.9k
196
11.9k
   if((tag_size == 1 && val_bytes > 255) ||
197
11.9k
      (tag_size == 2 && val_bytes > 65535))
198
0
      throw Invalid_Argument("append_tls_length_value: value too large");
199
11.9k
200
35.9k
   for(size_t i = 0; i != tag_size; ++i)
201
23.9k
      buf.push_back(get_byte(sizeof(val_bytes)-tag_size+i, val_bytes));
202
11.9k
203
931k
   for(size_t i = 0; i != vals_size; ++i)
204
2.75M
      for(size_t j = 0; j != T_size; ++j)
205
1.83M
         buf.push_back(get_byte(j, vals[i]));
206
11.9k
   }
void Botan::TLS::append_tls_length_value<unsigned char, Botan::secure_allocator<unsigned char> >(std::__1::vector<unsigned char, Botan::secure_allocator<unsigned char> >&, unsigned char const*, unsigned long, unsigned long)
Line
Count
Source
189
24.9k
   {
190
24.9k
   const size_t T_size = sizeof(T);
191
24.9k
   const size_t val_bytes = T_size * vals_size;
192
24.9k
193
24.9k
   if(tag_size != 1 && tag_size != 2)
194
0
      throw Invalid_Argument("append_tls_length_value: invalid tag size");
195
24.9k
196
24.9k
   if((tag_size == 1 && val_bytes > 255) ||
197
24.9k
      (tag_size == 2 && val_bytes > 65535))
198
0
      throw Invalid_Argument("append_tls_length_value: value too large");
199
24.9k
200
74.8k
   for(size_t i = 0; i != tag_size; ++i)
201
49.9k
      buf.push_back(get_byte(sizeof(val_bytes)-tag_size+i, val_bytes));
202
24.9k
203
1.36M
   for(size_t i = 0; i != vals_size; ++i)
204
2.68M
      for(size_t j = 0; j != T_size; ++j)
205
1.34M
         buf.push_back(get_byte(j, vals[i]));
206
24.9k
   }
207
208
template<typename T, typename Alloc, typename Alloc2>
209
void append_tls_length_value(std::vector<uint8_t, Alloc>& buf,
210
                             const std::vector<T, Alloc2>& vals,
211
                             size_t tag_size)
212
128k
   {
213
128k
   append_tls_length_value(buf, vals.data(), vals.size(), tag_size);
214
128k
   }
void Botan::TLS::append_tls_length_value<unsigned char, std::__1::allocator<unsigned char>, std::__1::allocator<unsigned char> >(std::__1::vector<unsigned char, std::__1::allocator<unsigned char> >&, std::__1::vector<unsigned char, std::__1::allocator<unsigned char> > const&, unsigned long)
Line
Count
Source
212
91.1k
   {
213
91.1k
   append_tls_length_value(buf, vals.data(), vals.size(), tag_size);
214
91.1k
   }
void Botan::TLS::append_tls_length_value<unsigned short, std::__1::allocator<unsigned char>, std::__1::allocator<unsigned short> >(std::__1::vector<unsigned char, std::__1::allocator<unsigned char> >&, std::__1::vector<unsigned short, std::__1::allocator<unsigned short> > const&, unsigned long)
Line
Count
Source
212
11.9k
   {
213
11.9k
   append_tls_length_value(buf, vals.data(), vals.size(), tag_size);
214
11.9k
   }
Unexecuted instantiation: void Botan::TLS::append_tls_length_value<unsigned char, std::__1::allocator<unsigned char>, Botan::secure_allocator<unsigned char> >(std::__1::vector<unsigned char, std::__1::allocator<unsigned char> >&, std::__1::vector<unsigned char, Botan::secure_allocator<unsigned char> > const&, unsigned long)
void Botan::TLS::append_tls_length_value<unsigned char, Botan::secure_allocator<unsigned char>, std::__1::allocator<unsigned char> >(std::__1::vector<unsigned char, Botan::secure_allocator<unsigned char> >&, std::__1::vector<unsigned char, std::__1::allocator<unsigned char> > const&, unsigned long)
Line
Count
Source
212
1.13k
   {
213
1.13k
   append_tls_length_value(buf, vals.data(), vals.size(), tag_size);
214
1.13k
   }
void Botan::TLS::append_tls_length_value<unsigned char, Botan::secure_allocator<unsigned char>, Botan::secure_allocator<unsigned char> >(std::__1::vector<unsigned char, Botan::secure_allocator<unsigned char> >&, std::__1::vector<unsigned char, Botan::secure_allocator<unsigned char> > const&, unsigned long)
Line
Count
Source
212
23.8k
   {
213
23.8k
   append_tls_length_value(buf, vals.data(), vals.size(), tag_size);
214
23.8k
   }
215
216
template<typename Alloc>
217
void append_tls_length_value(std::vector<uint8_t, Alloc>& buf,
218
                             const std::string& str,
219
                             size_t tag_size)
220
20.1k
   {
221
20.1k
   append_tls_length_value(buf,
222
20.1k
                           cast_char_ptr_to_uint8(str.data()),
223
20.1k
                           str.size(),
224
20.1k
                           tag_size);
225
20.1k
   }
226
227
}
228
229
}
230
231
#endif