#include <pk_ops_impl.h>

Inheritance diagram for Botan::PK_Ops::Encryption_with_Padding:

Public Member Functions
virtual size_t	ciphertext_length (size_t ptext_len) const =0
std::vector< uint8_t >	encrypt (std::span< const uint8_t > ptext, RandomNumberGenerator &rng) override
size_t	max_input_bits () const override
	~Encryption_with_Padding () override

Protected Member Functions
	Encryption_with_Padding (std::string_view padding)

Detailed Description

Definition at line 25 of file pk_ops_impl.h.

Constructor & Destructor Documentation

◆ ~Encryption_with_Padding()

Botan::PK_Ops::Encryption_with_Padding::~Encryption_with_Padding ( )

overridedefault

◆ Encryption_with_Padding()

Botan::PK_Ops::Encryption_with_Padding::Encryption_with_Padding ( std::string_view padding )

explicitprotected

Definition at line 30 of file pk_ops.cpp.

30 :

31 m_padding(EncryptionPaddingScheme::create(padding)) {}

Botan::EncryptionPaddingScheme::create

static std::unique_ptr< EncryptionPaddingScheme > create(std::string_view algo_spec)

Definition enc_padding.cpp:27

Member Function Documentation

◆ ciphertext_length()

virtual size_t Botan::PK_Ops::Encryption::ciphertext_length ( size_t ptext_len ) const

pure virtualinherited

Given the plaintext length, return an upper bound of the ciphertext length for this key and padding.

◆ encrypt()

std::vector< uint8_t > Botan::PK_Ops::Encryption_with_Padding::encrypt	(	std::span< const uint8_t >	msg,
		RandomNumberGenerator &	rng )

overridevirtual

Encrypt a message returning the ciphertext

Implements Botan::PK_Ops::Encryption.

Definition at line 39 of file pk_ops.cpp.

                                                                                          {
   const size_t max_input_bits = max_ptext_input_bits();
   const size_t max_input_bytes = (max_input_bits + 7) / 8;
   BOTAN_ARG_CHECK(msg.size() <= max_input_bytes, "Plaintext too large");
 
   secure_vector<uint8_t> padded_ptext(max_input_bits);
   const size_t written = m_padding->pad(padded_ptext, msg, max_input_bits, rng);
   return raw_encrypt(std::span{padded_ptext}.first(written), rng);
}

References BOTAN_ARG_CHECK, and max_input_bits().

◆ max_input_bits()

size_t Botan::PK_Ops::Encryption_with_Padding::max_input_bits ( ) const

overridevirtual

Return the maximum input size for this key

Implements Botan::PK_Ops::Encryption.

Definition at line 35 of file pk_ops.cpp.

                                                           {
   return 8 * m_padding->maximum_input_size(max_ptext_input_bits());
}

Referenced by encrypt().

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

src/lib/pubkey/pk_ops_impl.h
src/lib/pubkey/pk_ops.cpp

Public Member Functions

Protected Member Functions