The QPasswordDigestor namespace contains functions which you can use to generate hashes or keys. 更多...
| 头： | #include <QPasswordDigestor> |
| qmake: | QT += network |
| QByteArray | deriveKeyPbkdf1 (QCryptographicHash::Algorithm algorithm , const QByteArray & data , const QByteArray & salt , int iterations , quint64 dkLen ) |
| QByteArray | deriveKeyPbkdf2 (QCryptographicHash::Algorithm algorithm , const QByteArray & data , const QByteArray & salt , int iterations , quint64 dkLen ) |
The QPasswordDigestor namespace contains functions which you can use to generate hashes or keys.
Returns a hash computed using the PBKDF1-algorithm as defined in RFC 8018 .
The function takes the data and salt , and then hashes it repeatedly for iterations iterations using the specified hash algorithm . If the resulting hash is longer than dkLen then it is truncated before it is returned.
This function only supports SHA-1 and MD5! The max output size is 160 bits (20 bytes) when using SHA-1, or 128 bits (16 bytes) when using MD5. Specifying a value for dkLen which is greater than this results in a warning and an empty QByteArray is returned. To programmatically check this limit you can use QCryptographicHash::hashLength . Furthermore: the salt must always be 8 bytes long!
注意： This function is provided for use with legacy applications and all new applications are recommended to use PBKDF2 .
该函数在 Qt 5.12 引入。
另请参阅 deriveKeyPbkdf2 , QCryptographicHash ，和 QCryptographicHash::hashLength .
Derive a key using the PBKDF2-algorithm as defined in RFC 8018 .
This function takes the
data
and
salt
, and then applies HMAC-X, where the X is
algorithm
, repeatedly. It internally concatenates intermediate results to the final output until at least
dkLen
amount of bytes have been computed and it will execute HMAC-X
iterations
times each time a concatenation is required. The total number of times it will execute HMAC-X depends on
iterations
,
dkLen
and
algorithm
and can be calculated as
iterations * ceil(dkLen / QCryptographicHash::hashLength(algorithm))
.
该函数在 Qt 5.12 引入。
另请参阅 deriveKeyPbkdf1 , QMessageAuthenticationCode ，和 QCryptographicHash .
