4805055462

Committed 26 Apr 2023 05:37AM UTC coverage: 92.146% (-0.002%) from 92.148%

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71.43

/src/lib/pk_pad/emsa_raw/emsa_raw.cpp

/*
* EMSA-Raw
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/internal/emsa_raw.h>

#include <botan/exceptn.h>

namespace Botan {

std::string EMSA_Raw::name() const
   {
   if(m_expected_size > 0)
      return "Raw(" + std::to_string(m_expected_size) + ")";
   return "Raw";
   }

/*
* EMSA-Raw Encode Operation
*/
void EMSA_Raw::update(const uint8_t input[], size_t length)
   {
   m_message += std::make_pair(input, length);
   }

/*
* Return the raw (unencoded) data
*/
std::vector<uint8_t> EMSA_Raw::raw_data()
   {
   if(m_expected_size && m_message.size() != m_expected_size)
      throw Invalid_Argument("EMSA_Raw was configured to use a " +
                             std::to_string(m_expected_size) +
                             " byte hash but instead was used for a " +
                             std::to_string(m_message.size()) + " hash");

   std::vector<uint8_t> output;
   std::swap(m_message, output);
   return output;
   }

/*
* EMSA-Raw Encode Operation
*/
std::vector<uint8_t>
EMSA_Raw::encoding_of(const std::vector<uint8_t>& msg,
                      size_t /*output_bits*/,
                      RandomNumberGenerator& /*rng*/)
   {
   if(m_expected_size && msg.size() != m_expected_size)
      throw Invalid_Argument("EMSA_Raw was configured to use a " +
                             std::to_string(m_expected_size) +
                             " byte hash but instead was used for a " +
                             std::to_string(msg.size()) + " hash");

   return msg;
   }

/*
* EMSA-Raw Verify Operation
*/
bool EMSA_Raw::verify(const std::vector<uint8_t>& coded,
                      const std::vector<uint8_t>& raw,
                      size_t /*key_bits*/)
   {
   if(m_expected_size && raw.size() != m_expected_size)
      return false;

   if(coded.size() == raw.size())
      return (coded == raw);

   if(coded.size() > raw.size())
      return false;

   // handle zero padding differences
   const size_t leading_zeros_expected = raw.size() - coded.size();

   bool same_modulo_leading_zeros = true;

   for(size_t i = 0; i != leading_zeros_expected; ++i)
      if(raw[i])
         same_modulo_leading_zeros = false;

   if(!constant_time_compare(coded.data(), raw.data() + leading_zeros_expected, coded.size()))
      same_modulo_leading_zeros = false;

   return same_modulo_leading_zeros;
   }

}

1	/*
2	* EMSA-Raw
3	* (C) 1999-2007 Jack Lloyd
4	*
5	* Botan is released under the Simplified BSD License (see license.txt)
6	*/
7
8	#include <botan/internal/emsa_raw.h>
9
10	#include <botan/exceptn.h>
11
12	namespace Botan {
13
14	std::string EMSA_Raw::name() const	3✔
15	{
16	if(m_expected_size > 0)	3✔
17	return "Raw(" + std::to_string(m_expected_size) + ")";	×
18	return "Raw";	3✔
19	}
20
21	/*
22	* EMSA-Raw Encode Operation
23	*/
24	void EMSA_Raw::update(const uint8_t input[], size_t length)	814✔
25	{
26	m_message += std::make_pair(input, length);	814✔
27	}	814✔
28
29	/*
30	* Return the raw (unencoded) data
31	*/
32	std::vector<uint8_t> EMSA_Raw::raw_data()	814✔
33	{
34	if(m_expected_size && m_message.size() != m_expected_size)	814✔
35	throw Invalid_Argument("EMSA_Raw was configured to use a " +	×
36	std::to_string(m_expected_size) +	×
37	" byte hash but instead was used for a " +	×
38	std::to_string(m_message.size()) + " hash");	×
39
40	std::vector<uint8_t> output;	814✔
41	std::swap(m_message, output);	814✔
42	return output;	814✔
43	}
44
45	/*
46	* EMSA-Raw Encode Operation
47	*/
48	std::vector<uint8_t>
49	EMSA_Raw::encoding_of(const std::vector<uint8_t>& msg,	385✔
50	size_t /output_bits/,
51	RandomNumberGenerator& /rng/)
52	{
53	if(m_expected_size && msg.size() != m_expected_size)	385✔
54	throw Invalid_Argument("EMSA_Raw was configured to use a " +	×
55	std::to_string(m_expected_size) +	×
56	" byte hash but instead was used for a " +	×
57	std::to_string(msg.size()) + " hash");	×
58
59	return msg;	385✔
60	}
61
62	/*
63	* EMSA-Raw Verify Operation
64	*/
65	bool EMSA_Raw::verify(const std::vector<uint8_t>& coded,	429✔
66	const std::vector<uint8_t>& raw,
67	size_t /key_bits/)
68	{
69	if(m_expected_size && raw.size() != m_expected_size)	429✔
70	return false;
71
72	if(coded.size() == raw.size())	429✔
73	return (coded == raw);	20✔
74
75	if(coded.size() > raw.size())	409✔
76	return false;
77
78	// handle zero padding differences
79	const size_t leading_zeros_expected = raw.size() - coded.size();	389✔
80
81	bool same_modulo_leading_zeros = true;	389✔
82
83	for(size_t i = 0; i != leading_zeros_expected; ++i)	6,434✔
84	if(raw[i])	6,045✔
85	same_modulo_leading_zeros = false;	270✔
86
87	if(!constant_time_compare(coded.data(), raw.data() + leading_zeros_expected, coded.size()))	389✔
88	same_modulo_leading_zeros = false;	×
89
90	return same_modulo_leading_zeros;
91	}
92
93	}

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