Botan
1.11.15
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#include <comb4p.h>
Public Types | |
typedef SCAN_Name | Spec |
Public Member Functions | |
void | clear () |
HashFunction * | clone () const |
Comb4P (HashFunction *h1, HashFunction *h2) | |
void | final (byte out[]) |
secure_vector< byte > | final () |
template<typename Alloc > | |
void | final (std::vector< byte, Alloc > &out) |
size_t | hash_block_size () const |
std::string | name () const |
size_t | output_length () const |
secure_vector< byte > | process (const byte in[], size_t length) |
secure_vector< byte > | process (const secure_vector< byte > &in) |
secure_vector< byte > | process (const std::vector< byte > &in) |
secure_vector< byte > | process (const std::string &in) |
void | update (const byte in[], size_t length) |
void | update (const secure_vector< byte > &in) |
void | update (const std::vector< byte > &in) |
void | update (const std::string &str) |
void | update (byte in) |
template<typename T > | |
void | update_be (const T in) |
Static Public Member Functions | |
static Comb4P * | make (const Spec &spec) |
Combines two hash functions using a Feistel scheme. Described in "On the Security of Hash Function Combiners", Anja Lehmann
typedef SCAN_Name Botan::HashFunction::Spec [inherited] |
Botan::Comb4P::Comb4P | ( | HashFunction * | h1, |
HashFunction * | h2 | ||
) |
h1 | the first hash |
h2 | the second hash |
Definition at line 54 of file comb4p.cpp.
References clear().
Referenced by make().
: m_hash1(h1), m_hash2(h2) { if(m_hash1->name() == m_hash2->name()) throw std::invalid_argument("Comb4P: Must use two distinct hashes"); if(m_hash1->output_length() != m_hash2->output_length()) throw std::invalid_argument("Comb4P: Incompatible hashes " + m_hash1->name() + " and " + m_hash2->name()); clear(); }
void Botan::Comb4P::clear | ( | ) | [virtual] |
Implements Botan::HashFunction.
Definition at line 80 of file comb4p.cpp.
Referenced by Comb4P().
{
m_hash1->clear();
m_hash2->clear();
// Prep for processing next message, if any
m_hash1->update(0);
m_hash2->update(0);
}
HashFunction* Botan::Comb4P::clone | ( | ) | const [inline, virtual] |
Implements Botan::HashFunction.
Definition at line 37 of file comb4p.h.
{ return new Comb4P(m_hash1->clone(), m_hash2->clone()); }
void Botan::Buffered_Computation::final | ( | byte | out[] | ) | [inline, inherited] |
Complete the computation and retrieve the final result.
out | The byte array to be filled with the result. Must be of length output_length() |
Definition at line 90 of file buf_comp.h.
Referenced by botan_hash_final(), botan_mac_final(), Botan::McEliece_KEM_Decryptor::decrypt(), Botan::TLS::Session::decrypt(), Botan::McEliece_KEM_Encryptor::encrypt(), Botan::TLS::Session::encrypt(), Botan::mgf1_mask(), Botan::pbkdf2(), and Botan::TLS::write_record().
{ final_result(out); }
secure_vector<byte> Botan::Buffered_Computation::final | ( | ) | [inline, inherited] |
Complete the computation and retrieve the final result.
Definition at line 97 of file buf_comp.h.
{ secure_vector<byte> output(output_length()); final_result(&output[0]); return output; }
void Botan::Buffered_Computation::final | ( | std::vector< byte, Alloc > & | out | ) | [inline, inherited] |
Definition at line 105 of file buf_comp.h.
{ out.resize(output_length()); final_result(&out[0]); }
size_t Botan::Comb4P::hash_block_size | ( | ) | const [virtual] |
Reimplemented from Botan::HashFunction.
Definition at line 68 of file comb4p.cpp.
{ if(m_hash1->hash_block_size() == m_hash2->hash_block_size()) return m_hash1->hash_block_size(); /* * Return LCM of the block sizes? This would probably be OK for * HMAC, which is the main thing relying on knowing the block size. */ return 0; }
Comb4P * Botan::Comb4P::make | ( | const Spec & | spec | ) | [static] |
Definition at line 40 of file comb4p.cpp.
References Botan::SCAN_Name::arg(), Botan::SCAN_Name::arg_count(), and Comb4P().
{ if(spec.arg_count() == 2) { auto& hashes = Algo_Registry<HashFunction>::global_registry(); std::unique_ptr<HashFunction> h1(hashes.make(spec.arg(0))); std::unique_ptr<HashFunction> h2(hashes.make(spec.arg(1))); if(h1 && h2) return new Comb4P(h1.release(), h2.release()); } return nullptr; }
std::string Botan::Comb4P::name | ( | ) | const [inline, virtual] |
Implements Botan::HashFunction.
Definition at line 42 of file comb4p.h.
References name().
Referenced by name().
{ return "Comb4P(" + m_hash1->name() + "," + m_hash2->name() + ")"; }
size_t Botan::Comb4P::output_length | ( | ) | const [inline, virtual] |
Implements Botan::Buffered_Computation.
Definition at line 30 of file comb4p.h.
{
return m_hash1->output_length() + m_hash2->output_length();
}
secure_vector<byte> Botan::Buffered_Computation::process | ( | const byte | in[], |
size_t | length | ||
) | [inline, inherited] |
Update and finalize computation. Does the same as calling update() and final() consecutively.
in | the input to process as a byte array |
length | the length of the byte array |
Definition at line 118 of file buf_comp.h.
Referenced by Botan::HMAC_RNG::HMAC_RNG(), Botan::RTSS_Share::split(), and Botan::Cert_Extension::Subject_Key_ID::Subject_Key_ID().
{ add_data(in, length); return final(); }
secure_vector<byte> Botan::Buffered_Computation::process | ( | const secure_vector< byte > & | in | ) | [inline, inherited] |
Update and finalize computation. Does the same as calling update() and final() consecutively.
in | the input to process |
Definition at line 130 of file buf_comp.h.
{ add_data(&in[0], in.size()); return final(); }
secure_vector<byte> Botan::Buffered_Computation::process | ( | const std::vector< byte > & | in | ) | [inline, inherited] |
Update and finalize computation. Does the same as calling update() and final() consecutively.
in | the input to process |
Definition at line 142 of file buf_comp.h.
{ add_data(&in[0], in.size()); return final(); }
secure_vector<byte> Botan::Buffered_Computation::process | ( | const std::string & | in | ) | [inline, inherited] |
void Botan::Buffered_Computation::update | ( | const byte | in[], |
size_t | length | ||
) | [inline, inherited] |
Add new input to process.
in | the input to process as a byte array |
length | of param in in bytes |
Definition at line 34 of file buf_comp.h.
Referenced by botan_hash_update(), botan_mac_update(), Botan::McEliece_KEM_Decryptor::decrypt(), Botan::TLS::Session::decrypt(), Botan::McEliece_KEM_Encryptor::encrypt(), Botan::TLS::Session::encrypt(), Botan::mgf1_mask(), Botan::pbkdf2(), and Botan::TLS::write_record().
{ add_data(in, length); }
void Botan::Buffered_Computation::update | ( | const secure_vector< byte > & | in | ) | [inline, inherited] |
Add new input to process.
in | the input to process as a secure_vector |
Definition at line 40 of file buf_comp.h.
{ add_data(&in[0], in.size()); }
void Botan::Buffered_Computation::update | ( | const std::vector< byte > & | in | ) | [inline, inherited] |
Add new input to process.
in | the input to process as a std::vector |
Definition at line 49 of file buf_comp.h.
{ add_data(&in[0], in.size()); }
void Botan::Buffered_Computation::update | ( | const std::string & | str | ) | [inline, inherited] |
Add new input to process.
str | the input to process as a std::string. Will be interpreted as a byte array based on the strings encoding. |
Definition at line 73 of file buf_comp.h.
{ add_data(reinterpret_cast<const byte*>(str.data()), str.size()); }
void Botan::Buffered_Computation::update | ( | byte | in | ) | [inline, inherited] |
Process a single byte.
in | the byte to process |
Definition at line 82 of file buf_comp.h.
{ add_data(&in, 1); }
void Botan::Buffered_Computation::update_be | ( | const T | in | ) | [inline, inherited] |
Add an integer in big-endian order
in | the value |
Definition at line 58 of file buf_comp.h.
References Botan::get_byte().
Referenced by Botan::mgf1_mask(), and Botan::pbkdf2().