QPasswordDigestor¶
The QPasswordDigestor namespace contains functions which you can use to generate hashes or keys. More…
New in version 5.12.
Synopsis¶
Static functions¶
def
deriveKeyPbkdf1
(algorithm, password, salt, iterations, dkLen)def
deriveKeyPbkdf2
(algorithm, password, salt, iterations, dkLen)
Detailed Description¶

static
PySide2.QtNetwork.QPasswordDigestor.
deriveKeyPbkdf1
(algorithm, password, salt, iterations, dkLen)¶  Parameters
algorithm –
Algorithm
password –
PySide2.QtCore.QByteArray
salt –
PySide2.QtCore.QByteArray
iterations – int
dkLen – int
 Return type
Returns a hash computed using the PBKDF1algorithm as defined in RFC 8018 .
The function takes the
data
andsalt
, and then hashes it repeatedly foriterations
iterations using the specified hashalgorithm
. If the resulting hash is longer thandkLen
then it is truncated before it is returned.This function only supports SHA1 and MD5! The max output size is 160 bits (20 bytes) when using SHA1, or 128 bits (16 bytes) when using MD5. Specifying a value for
dkLen
which is greater than this results in a warning and an emptyQByteArray
is returned. To programmatically check this limit you can usehashLength
. Furthermore: thesalt
must always be 8 bytes long!Note
This function is provided for use with legacy applications and all new applications are recommended to use
PBKDF2
.See also
deriveKeyPbkdf2
QCryptographicHash
hashLength

static
PySide2.QtNetwork.QPasswordDigestor.
deriveKeyPbkdf2
(algorithm, password, salt, iterations, dkLen)¶  Parameters
algorithm –
Algorithm
password –
PySide2.QtCore.QByteArray
salt –
PySide2.QtCore.QByteArray
iterations – int
dkLen – int
 Return type
Derive a key using the PBKDF2algorithm as defined in RFC 8018 .
This function takes the
data
andsalt
, and then applies HMACX, where the X isalgorithm
, repeatedly. It internally concatenates intermediate results to the final output until at leastdkLen
amount of bytes have been computed and it will execute HMACXiterations
times each time a concatenation is required. The total number of times it will execute HMACX depends oniterations
,dkLen
andalgorithm
and can be calculated asiterations * ceil(dkLen / QCryptographicHash::hashLength(algorithm))
.See also
deriveKeyPbkdf1
QMessageAuthenticationCode
QCryptographicHash
© 2020 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.