QCryptographicHash Class

The QCryptographicHash class provides a way to generate cryptographic hashes. More...

Header: #include <QCryptographicHash>
qmake: QT += core
Since: Qt 4.3

Note: All functions in this class are reentrant.

Public Types

enum Algorithm { Md4, Md5, Sha1, Sha224, ..., Sha3_512 }

Public Functions

QCryptographicHash(Algorithm method)
void addData(const char * data, int length)
bool addData(QIODevice * device)
void addData(const QByteArray & data)
void reset()
QByteArray result() const

Static Public Members

QByteArray hash(const QByteArray & data, Algorithm method)

Detailed Description

The QCryptographicHash class provides a way to generate cryptographic hashes.

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

Currently MD4, MD5, SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512 are supported.

Member Type Documentation

enum QCryptographicHash::Algorithm

QCryptographicHash::Md40Generate an MD4 hash sum
QCryptographicHash::Md51Generate an MD5 hash sum
QCryptographicHash::Sha12Generate an SHA-1 hash sum
QCryptographicHash::Sha2243Generate an SHA-224 hash sum (SHA-2). Introduced in Qt 5.0
QCryptographicHash::Sha2564Generate an SHA-256 hash sum (SHA-2). Introduced in Qt 5.0
QCryptographicHash::Sha3845Generate an SHA-384 hash sum (SHA-2). Introduced in Qt 5.0
QCryptographicHash::Sha5126Generate an SHA-512 hash sum (SHA-2). Introduced in Qt 5.0
QCryptographicHash::Sha3_2247Generate an SHA3-224 hash sum. Introduced in Qt 5.1
QCryptographicHash::Sha3_2568Generate an SHA3-256 hash sum. Introduced in Qt 5.1
QCryptographicHash::Sha3_3849Generate an SHA3-384 hash sum. Introduced in Qt 5.1
QCryptographicHash::Sha3_51210Generate an SHA3-512 hash sum. Introduced in Qt 5.1

Member Function Documentation

QCryptographicHash::QCryptographicHash(Algorithm method)

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


Destroys the object.

void QCryptographicHash::addData(const char * data, int length)

Adds the first length chars of data to the cryptographic hash.

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.

This function was introduced in Qt 5.0.

void QCryptographicHash::addData(const QByteArray & data)

This function overloads addData().

QByteArray QCryptographicHash::hash(const QByteArray & data, Algorithm method) [static]

Returns the hash of data using method.

void QCryptographicHash::reset()

Resets the object.

QByteArray QCryptographicHash::result() const

Returns the final hash value.

See also QByteArray::toHex().

Notes provided by the Qt Community
  • 5

Votes: 4

Coverage: Qt 5

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Area 51 Engineer
3 notes

example usage

  2.     QCryptographicHash md5Generator(QCryptographicHash::Md5);
  3.     md5Generator.addData("abcdefghijklmnopqrstuvwxyz");
  4.     qDebug() << md5Generator.result().toHex();