Sha256 Class Reference

Detailed Description

Represents a SHA-256 cryptographic checksum.

See also https://en.wikipedia.org/wiki/SHA-2.

This class is not bound in pydrake, because Python programmers should prefer using https://docs.python.org/3/library/hashlib.html instead.

#include <drake/common/sha256.h>

Public Member Functions
	Sha256 ()
	Constructs an all-zero checksum. More...
std::string	to_string () const
	Returns the 64-character ASCII hex representation of this checksum. More...
bool	operator== (const Sha256 &other) const
bool	operator!= (const Sha256 &other) const
bool	operator< (const Sha256 &other) const
Implements CopyConstructible, CopyAssignable, MoveConstructible, MoveAssignable
	Sha256 (const Sha256 &)=default
Sha256 &	operator= (const Sha256 &)=default
	Sha256 (Sha256 &&)=default
Sha256 &	operator= (Sha256 &&)=default

Static Public Member Functions
static Sha256	Checksum (std::string_view data)
	Computes the checksum of the given data buffer. More...
static Sha256	Checksum (std::istream *stream)
	Computes the checksum of the given stream. More...
static std::optional< Sha256 >	Parse (std::string_view sha256)
	Parses the 64-character ASCII hex representation of a SHA-256 checksum. More...

Friends
class	std::hash< Sha256 >

Constructor & Destructor Documentation

Sha256() [1/3]

Sha256 ( const Sha256 &  )

default

Sha256() [2/3]

Sha256 ( Sha256 &&  )

default

Sha256() [3/3]

Sha256

(

)

Constructs an all-zero checksum.

Note that this is NOT the same as the checksum of empty (zero-sized) data.

Member Function Documentation

Checksum() [1/2]

static Sha256 Checksum ( std::string_view  data )

static

Computes the checksum of the given data buffer.

Checksum() [2/2]

static Sha256 Checksum ( std::istream *  stream )

static

Computes the checksum of the given stream.

Does not check for istream errors; that is the responsibility of the caller.

Precondition

stream != nullptr.

operator!=()

bool operator!=

(

const Sha256 &

other

)

const

operator<()

bool operator<

(

const Sha256 &

other

)

const

operator=() [1/2]

Sha256& operator= ( Sha256 &&  )

default

operator=() [2/2]

Sha256& operator= ( const Sha256 &  )

default

operator==()

bool operator==

(

const Sha256 &

other

)

const

Parse()

static std::optional<Sha256> Parse ( std::string_view  sha256 )

static

Parses the 64-character ASCII hex representation of a SHA-256 checksum.

Returns std::nullopt if the argument is an invalid checksum.

to_string()

std::string to_string

(

)

const

Returns the 64-character ASCII hex representation of this checksum.

Friends And Related Function Documentation

std::hash< Sha256 >

friend class std::hash< Sha256 >

friend

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

• drake/common/sha256.h