#include <mgf1.h>

Inheritance diagram for Botan::MGF1:

Public Member Functions
void	mask (const byte[], size_t, byte[], size_t) const
	MGF1 (HashFunction *hash)
	~MGF1 ()

Detailed Description

MGF1 from PKCS #1 v2.0

Definition at line 19 of file mgf1.h.

Constructor & Destructor Documentation

◆ MGF1()

Botan::MGF1::MGF1 ( HashFunction * hash )

MGF1 constructor: takes ownership of hash

Definition at line 42 of file mgf1.cpp.

                          : hash(h)
   {
   if(!hash)
      throw Invalid_Argument("MGF1 given null hash object");
   }

Referenced by Botan::EME1::EME1(), Botan::EMSA4::EMSA4(), and Botan::EMSA4::EMSA4().

◆ ~MGF1()

Botan::MGF1::~MGF1 ( )

Definition at line 51 of file mgf1.cpp.

   {
   delete hash;
   }

Member Function Documentation

◆ mask()

void Botan::MGF1::mask	(	const byte	in[],
		size_t	in_len,
		byte	out[],
		size_t	out_len ) const

virtual

Implements Botan::MGF.

Definition at line 19 of file mgf1.cpp.

   {
   u32bit counter = 0;
 
   while(out_len)
      {
      hash->update(in, in_len);
      hash->update_be(counter);
      SecureVector<byte> buffer = hash->final();
 
      size_t xored = std::min<size_t>(buffer.size(), out_len);
      xor_buf(out, &buffer[0], xored);
      out += xored;
      out_len -= xored;
 
      ++counter;
      }
   }

References Botan::MemoryRegion< T >::size(), and Botan::xor_buf().

The documentation for this class was generated from the following files: