Botan 3.9.0
Crypto and TLS for C&
Botan::Hex_Encoder Class Referencefinal

#include <filters.h>

Inheritance diagram for Botan::Hex_Encoder:
Botan::Filter

Public Types

enum  Case : uint8_t { Uppercase , Lowercase }

Public Member Functions

virtual bool attachable ()
void end_msg () override
BOTAN_FUTURE_EXPLICIT Hex_Encoder (bool newlines=false, size_t line_length=72, Case the_case=Uppercase)
 Hex_Encoder (Case the_case)
std::string name () const override
virtual void start_msg ()
void write (const uint8_t in[], size_t length) override

Protected Member Functions

virtual void send (const uint8_t in[], size_t length)
void send (std::span< const uint8_t > in)
void send (std::span< const uint8_t > in, size_t length)
void send (uint8_t in)

Detailed Description

Converts arbitrary binary data to hex strings, optionally with newlines inserted

Definition at line 557 of file filters.h.

Member Enumeration Documentation

◆ Case

enum Botan::Hex_Encoder::Case : uint8_t

Whether to use uppercase or lowercase letters for the encoded string.

Enumerator
Uppercase 
Lowercase 

Definition at line 562 of file filters.h.

562: uint8_t { Uppercase, Lowercase };

Constructor & Destructor Documentation

◆ Hex_Encoder() [1/2]

Botan::Hex_Encoder::Hex_Encoder ( Case the_case)
explicit

Create a hex encoder.

Parameters
the_casethe case to use in the encoded strings.

Definition at line 33 of file hex_filt.cpp.

33 : m_casing(c), m_line_length(0) {
34 m_in.resize(HEX_CODEC_BUFFER_SIZE);
35 m_out.resize(2 * m_in.size());
36}
const size_t HEX_CODEC_BUFFER_SIZE
Definition hex_filt.cpp:20

References Botan::HEX_CODEC_BUFFER_SIZE.

◆ Hex_Encoder() [2/2]

Botan::Hex_Encoder::Hex_Encoder ( bool newlines = false,
size_t line_length = 72,
Case the_case = Uppercase )

Create a hex encoder.

Parameters
newlinesshould newlines be used
line_lengthif newlines are used, how long are lines
the_casethe case to use in the encoded strings

Definition at line 25 of file hex_filt.cpp.

25 : m_casing(c), m_line_length(breaks ? length : 0) {
26 m_in.resize(HEX_CODEC_BUFFER_SIZE);
27 m_out.resize(2 * m_in.size());
28}

References Botan::HEX_CODEC_BUFFER_SIZE.

Member Function Documentation

◆ attachable()

virtual bool Botan::Filter::attachable ( )
inlinevirtualinherited

Check whether this filter is an attachable filter.

Returns
true if this filter is attachable, false otherwise

Reimplemented in Botan::DataSink, and Botan::SecureQueue.

Definition at line 54 of file filter.h.

54{ return true; }

◆ end_msg()

void Botan::Hex_Encoder::end_msg ( )
overridevirtual

Notify that the current message is finished; flush buffers and do end-of-message processing (if any).

Reimplemented from Botan::Filter.

Definition at line 88 of file hex_filt.cpp.

88 {
89 encode_and_send(m_in.data(), m_position);
90 if(m_counter > 0 && m_line_length > 0) {
91 send('\n');
92 }
93 m_counter = m_position = 0;
94}
virtual void send(const uint8_t in[], size_t length)
Definition filter.cpp:30

References Botan::Filter::send().

◆ name()

std::string Botan::Hex_Encoder::name ( ) const
inlineoverridevirtual
Returns
descriptive name for this filter

Implements Botan::Filter.

Definition at line 564 of file filters.h.

564{ return "Hex_Encoder"; }

◆ send() [1/4]

void Botan::Filter::send ( const uint8_t in[],
size_t length )
protectedvirtualinherited
Parameters
insome input for the filter
lengththe length of in

Definition at line 30 of file filter.cpp.

30 {
31 if(length == 0) {
32 return;
33 }
34
35 bool nothing_attached = true;
36 for(size_t j = 0; j != total_ports(); ++j) {
37 if(m_next[j] != nullptr) {
38 if(!m_write_queue.empty()) {
39 m_next[j]->write(m_write_queue.data(), m_write_queue.size());
40 }
41 m_next[j]->write(input, length);
42 nothing_attached = false;
43 }
44 }
45
46 if(nothing_attached) {
47 m_write_queue += std::make_pair(input, length);
48 } else {
49 m_write_queue.clear();
50 }
51}

Referenced by Botan::Base64_Decoder::end_msg(), Botan::Base64_Encoder::end_msg(), Botan::Hex_Decoder::end_msg(), Botan::Hex_Encoder::end_msg(), operator=(), send(), Botan::Base64_Decoder::write(), Botan::Chain::write(), Botan::Fork::write(), and Botan::Hex_Decoder::write().

◆ send() [2/4]

void Botan::Filter::send ( std::span< const uint8_t > in)
inlineprotectedinherited
Parameters
insome input for the filter

Definition at line 78 of file filter.h.

78{ send(in.data(), in.size()); }

References send().

Referenced by send().

◆ send() [3/4]

void Botan::Filter::send ( std::span< const uint8_t > in,
size_t length )
protectedinherited
Parameters
insome input for the filter
lengththe number of bytes of in to send

This previously took a std::vector, for which the length field (allowing using just a prefix of the vector) somewhat made sense. It makes less sense now that we are using a span here; you can just use first to get a prefix.

Definition at line 22 of file filter.cpp.

22 {
23 BOTAN_ASSERT_NOMSG(length <= in.size());
24 send(in.data(), length);
25}
#define BOTAN_ASSERT_NOMSG(expr)
Definition assert.h:75

References BOTAN_ASSERT_NOMSG, and send().

◆ send() [4/4]

void Botan::Filter::send ( uint8_t in)
inlineprotectedinherited
Parameters
insome input for the filter

Definition at line 73 of file filter.h.

73{ send(&in, 1); }

References send().

Referenced by send().

◆ start_msg()

virtual void Botan::Filter::start_msg ( )
inlinevirtualinherited

Start a new message. Must be closed by end_msg() before another message can be started.

Definition at line 40 of file filter.h.

40 { /* default empty */
41 }

◆ write()

void Botan::Hex_Encoder::write ( const uint8_t input[],
size_t length )
overridevirtual

Write a portion of a message to this filter.

Parameters
inputthe input as a byte array
lengththe length of the byte array input

Implements Botan::Filter.

Definition at line 66 of file hex_filt.cpp.

66 {
67 const size_t initial_fill = std::min(m_in.size() - m_position, length);
68 copy_mem(&m_in[m_position], input, initial_fill);
69
70 if(m_position + length >= m_in.size()) {
71 encode_and_send(m_in.data(), m_in.size());
72 input += (m_in.size() - m_position);
73 length -= (m_in.size() - m_position);
74 while(length >= m_in.size()) {
75 encode_and_send(input, m_in.size());
76 input += m_in.size();
77 length -= m_in.size();
78 }
79 copy_mem(m_in.data(), input, length);
80 m_position = 0;
81 }
82 m_position += length;
83}
constexpr void copy_mem(T *out, const T *in, size_t n)
Definition mem_ops.h:145

References Botan::copy_mem().


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