\inmodule QtCore More...

#include <qcryptographichash.h>

Collaboration diagram for QCryptographicHash:

Public Types
enum	Algorithm { Md4 , Md5 , Sha1 = 2 , Sha224 , Sha256 , Sha384 , Sha512 , Keccak_224 = 7 , Keccak_256 , Keccak_384 , Keccak_512 , RealSha3_224 = 11 , RealSha3_256 , RealSha3_384 , RealSha3_512 , Sha3_224 = RealSha3_224 , Sha3_256 = RealSha3_256 , Sha3_384 = RealSha3_384 , Sha3_512 = RealSha3_512 , Blake2b_160 = 15 , Blake2b_256 , Blake2b_384 , Blake2b_512 , Blake2s_128 , Blake2s_160 , Blake2s_224 , Blake2s_256 , NumAlgorithms }

Public Member Functions
	QCryptographicHash (Algorithm method)
	Constructs an object that can be used to create a cryptographic hash from data using method.

	QCryptographicHash (QCryptographicHash &&other) noexcept
	Move-constructs a new QCryptographicHash from other.

	~QCryptographicHash ()
	Destroys the object.

void	swap (QCryptographicHash &other) noexcept
	\memberswap{cryptographic hash}

void	reset () noexcept
	Resets the object.

Algorithm	algorithm () const noexcept
	Returns the algorithm used to generate the cryptographic hash.

void	addData (QByteArrayView data) noexcept
	Adds the characters in bytes to the cryptographic hash.

bool	addData (QIODevice *device)
	Reads the data from the open QIODevice device until it ends and hashes it.

QByteArray	result () const
	Returns the final hash value.

QByteArrayView	resultView () const noexcept

Static Public Member Functions
static QByteArray	hash (QByteArrayView data, Algorithm method)
	Returns the hash of data using method.

static QByteArrayView	hashInto (QSpan< char > buffer, QByteArrayView data, Algorithm method) noexcept

static QByteArrayView	hashInto (QSpan< uchar > buffer, QByteArrayView data, Algorithm method) noexcept

static QByteArrayView	hashInto (QSpan< std::byte > buffer, QByteArrayView data, Algorithm method) noexcept
	Returns the hash of data using method, using buffer to store the result.

static QByteArrayView	hashInto (QSpan< char > buffer, QSpan< const QByteArrayView > data, Algorithm method) noexcept

static QByteArrayView	hashInto (QSpan< uchar > buffer, QSpan< const QByteArrayView > data, Algorithm method) noexcept

static QByteArrayView	hashInto (QSpan< std::byte > buffer, QSpan< const QByteArrayView > data, Algorithm method) noexcept

static int	hashLength (Algorithm method)
	Returns the size of the output of the selected hash method in bytes.

static bool	supportsAlgorithm (Algorithm method)
	Returns whether the selected algorithm method is supported and if result() will return a value when the method is used.

Detailed Description

\inmodule QtCore

The QCryptographicHash class provides a way to generate cryptographic hashes.

Since: 4.3

\reentrant

QCryptographicHash can be used to generate cryptographic hashes of binary or text data.

Refer to the documentation of the \l QCryptographicHash::Algorithm enum for a list of the supported algorithms.

Definition at line 19 of file qcryptographichash.h.

Member Enumeration Documentation

◆ Algorithm

enum QCryptographicHash::Algorithm

Note: In Qt versions before 5.9, when asked to generate a SHA3 hash sum, QCryptographicHash actually calculated Keccak. If you need compatibility with SHA-3 hashes produced by those versions of Qt, use the {Keccak_} enumerators. Alternatively, if source compatibility is required, define the macro QT_SHA3_KECCAK_COMPAT.

\value Md4 Generate an MD4 hash sum \value Md5 Generate an MD5 hash sum \value Sha1 Generate an SHA-1 hash sum \value Sha224 Generate an SHA-224 hash sum (SHA-2). Introduced in Qt 5.0 \value Sha256 Generate an SHA-256 hash sum (SHA-2). Introduced in Qt 5.0 \value Sha384 Generate an SHA-384 hash sum (SHA-2). Introduced in Qt 5.0 \value Sha512 Generate an SHA-512 hash sum (SHA-2). Introduced in Qt 5.0 \value Sha3_224 Generate an SHA3-224 hash sum. Introduced in Qt 5.1 \value Sha3_256 Generate an SHA3-256 hash sum. Introduced in Qt 5.1 \value Sha3_384 Generate an SHA3-384 hash sum. Introduced in Qt 5.1 \value Sha3_512 Generate an SHA3-512 hash sum. Introduced in Qt 5.1 \value Keccak_224 Generate a Keccak-224 hash sum. Introduced in Qt 5.9.2 \value Keccak_256 Generate a Keccak-256 hash sum. Introduced in Qt 5.9.2 \value Keccak_384 Generate a Keccak-384 hash sum. Introduced in Qt 5.9.2 \value Keccak_512 Generate a Keccak-512 hash sum. Introduced in Qt 5.9.2 \value Blake2b_160 Generate a BLAKE2b-160 hash sum. Introduced in Qt 6.0 \value Blake2b_256 Generate a BLAKE2b-256 hash sum. Introduced in Qt 6.0 \value Blake2b_384 Generate a BLAKE2b-384 hash sum. Introduced in Qt 6.0 \value Blake2b_512 Generate a BLAKE2b-512 hash sum. Introduced in Qt 6.0 \value Blake2s_128 Generate a BLAKE2s-128 hash sum. Introduced in Qt 6.0 \value Blake2s_160 Generate a BLAKE2s-160 hash sum. Introduced in Qt 6.0 \value Blake2s_224 Generate a BLAKE2s-224 hash sum. Introduced in Qt 6.0 \value Blake2s_256 Generate a BLAKE2s-256 hash sum. Introduced in Qt 6.0 \omitvalue RealSha3_224 \omitvalue RealSha3_256 \omitvalue RealSha3_384 \omitvalue RealSha3_512 \omitvalue NumAlgorithms

Enumerator
Md4
Md5
Sha1
Sha224
Sha256
Sha384
Sha512
Keccak_224
Keccak_256
Keccak_384
Keccak_512
RealSha3_224
RealSha3_256
RealSha3_384
RealSha3_512
Sha3_224
Sha3_256
Sha3_384
Sha3_512
Blake2b_160
Blake2b_256
Blake2b_384
Blake2b_512
Blake2s_128
Blake2s_160
Blake2s_224
Blake2s_256
NumAlgorithms

Definition at line 23 of file qcryptographichash.h.

Constructor & Destructor Documentation

◆ QCryptographicHash() [1/2]

QCryptographicHash::QCryptographicHash ( Algorithm method )

explicit

Constructs an object that can be used to create a cryptographic hash from data using method.

Definition at line 432 of file qcryptographichash.cpp.

◆ QCryptographicHash() [2/2]

QCryptographicHash::QCryptographicHash ( QCryptographicHash && other )

inlinenoexcept

Move-constructs a new QCryptographicHash from other.

Note: The moved-from object other is placed in a partially-formed state, in which the only valid operations are destruction and assignment of a new value.

Since: 6.5

Definition at line 69 of file qcryptographichash.h.

◆ ~QCryptographicHash()

QCryptographicHash::~QCryptographicHash ( )

Destroys the object.

Definition at line 452 of file qcryptographichash.cpp.

Member Function Documentation

◆ addData() [1/2]

void QCryptographicHash::addData ( QByteArrayView bytes )

noexcept

Adds the characters in bytes to the cryptographic hash.

Note: In Qt versions prior to 6.3, this function took QByteArray, not QByteArrayView.

Definition at line 761 of file qcryptographichash.cpp.

◆ addData() [2/2]

bool QCryptographicHash::addData ( QIODevice * device )

Reads the data from the open QIODevice device until it ends and hashes it.

Returns true if reading was successful.

Since: 5.0

Definition at line 880 of file qcryptographichash.cpp.

◆ algorithm()

QCryptographicHash::Algorithm QCryptographicHash::algorithm ( ) const

nodiscardnoexcept

Returns the algorithm used to generate the cryptographic hash.

Since: 6.5

Definition at line 488 of file qcryptographichash.cpp.

◆ hash()

QByteArray QCryptographicHash::hash	(	QByteArrayView	data,
		Algorithm	method )

static

Returns the hash of data using method.

Note: In Qt versions prior to 6.3, this function took QByteArray, not QByteArrayView.

See also: hashInto()

Definition at line 1101 of file qcryptographichash.cpp.

◆ hashInto() [1/6]

static QByteArrayView QCryptographicHash::hashInto	(	QSpan< char >	buffer,
		QByteArrayView	data,
		Algorithm	method )

inlinestaticnoexcept

Definition at line 96 of file qcryptographichash.h.

◆ hashInto() [2/6]

static QByteArrayView QCryptographicHash::hashInto	(	QSpan< char >	buffer,
		QSpan< const QByteArrayView >	data,
		Algorithm	method )

inlinestaticnoexcept

Since: 6.8

Definition at line 102 of file qcryptographichash.h.

◆ hashInto() [3/6]

static QByteArrayView QCryptographicHash::hashInto	(	QSpan< std::byte >	buffer,
		QByteArrayView	data,
		Algorithm	method )

inlinestaticnoexcept

Returns the hash of data using method, using buffer to store the result.

If data is a span, adds all the byte array views to the hash, in the order given.

The return value will be a sub-span of buffer, unless buffer is of insufficient size, in which case a null QByteArrayView is returned.

See also: hash()

Definition at line 100 of file qcryptographichash.h.

◆ hashInto() [4/6]

QByteArrayView QCryptographicHash::hashInto	(	QSpan< std::byte >	buffer,
		QSpan< const QByteArrayView >	data,
		Algorithm	method )

staticnoexcept

Definition at line 1127 of file qcryptographichash.cpp.

◆ hashInto() [5/6]

static QByteArrayView QCryptographicHash::hashInto	(	QSpan< uchar >	buffer,
		QByteArrayView	data,
		Algorithm	method )

inlinestaticnoexcept

Definition at line 98 of file qcryptographichash.h.

◆ hashInto() [6/6]

static QByteArrayView QCryptographicHash::hashInto	(	QSpan< uchar >	buffer,
		QSpan< const QByteArrayView >	data,
		Algorithm	method )

inlinestaticnoexcept

Definition at line 104 of file qcryptographichash.h.

◆ hashLength()

int QCryptographicHash::hashLength ( QCryptographicHash::Algorithm method )

static

Returns the size of the output of the selected hash method in bytes.

Since: 5.12

Definition at line 1150 of file qcryptographichash.cpp.

◆ reset()

void QCryptographicHash::reset ( )

noexcept

Resets the object.

Definition at line 478 of file qcryptographichash.cpp.

◆ result()

QByteArray QCryptographicHash::result ( ) const

Returns the final hash value.

See also: resultView(), QByteArray::toHex()

Definition at line 908 of file qcryptographichash.cpp.

◆ resultView()

QByteArrayView QCryptographicHash::resultView ( ) const

noexcept

Since: 6.3

Returns the final hash value.

Note that the returned view remains valid only as long as the QCryptographicHash object is not modified by other means.

See also: result()

Definition at line 923 of file qcryptographichash.cpp.

◆ supportsAlgorithm()

bool QCryptographicHash::supportsAlgorithm ( QCryptographicHash::Algorithm method )

static

Returns whether the selected algorithm method is supported and if result() will return a value when the method is used.

Note: OpenSSL will be responsible for providing this information when used as a provider, otherwise true will be returned as the non-OpenSSL implementation doesn't have any restrictions. We return false if we fail to query OpenSSL.

Since: 6.5

Definition at line 1168 of file qcryptographichash.cpp.

◆ swap()

void QCryptographicHash::swap ( QCryptographicHash & other )

inlinenoexcept

\memberswap{cryptographic hash}

Since: 6.5

Definition at line 73 of file qcryptographichash.h.

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

qtbase/src/corelib/tools/qcryptographichash.h (fa8256bb5a36aa18480bc603d538bf07c8464ec7)
qtbase/src/corelib/tools/qcryptographichash.cpp (b83e825fab16f83f86149ead78efb6ec3d2fa16d)

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ Algorithm

Constructor & Destructor Documentation

◆ QCryptographicHash() [1/2]

◆ QCryptographicHash() [2/2]

◆ ~QCryptographicHash()

Member Function Documentation

◆ addData() [1/2]

◆ addData() [2/2]

◆ algorithm()

◆ hash()

◆ hashInto() [1/6]

◆ hashInto() [2/6]

◆ hashInto() [3/6]

◆ hashInto() [4/6]

◆ hashInto() [5/6]

◆ hashInto() [6/6]

◆ hashLength()

◆ reset()

◆ result()

◆ resultView()

◆ supportsAlgorithm()

◆ swap()