有没有办法在 Qt 中获取磁盘上文件的 MD5 或 SHA-1 校验和/哈希?
Is there a way to get the MD5 or SHA-1 checksum/hash of a file on disk in Qt?
例如,我有文件路径,我可能需要验证该文件的内容是否与某个哈希值匹配.
For example, I have the file path and I might need to verify that the contents of that file matches a certain hash value.
用 QFile
打开文件,并调用 readAll()
将其内容拉入 QByteArray
.然后将其用于 QCryptographicHash::hash(const QByteArray& data, Algorithm method)
调用.
Open the file with QFile
, and call readAll()
to pull it's contents into a QByteArray
. Then use that for the QCryptographicHash::hash(const QByteArray& data, Algorithm method)
call.
在 Qt5 中你可以使用 addData()
:
In Qt5 you can use addData()
:
// Returns empty QByteArray() on failure.
QByteArray fileChecksum(const QString &fileName,
QCryptographicHash::Algorithm hashAlgorithm)
{
QFile f(fileName);
if (f.open(QFile::ReadOnly)) {
QCryptographicHash hash(hashAlgorithm);
if (hash.addData(&f)) {
return hash.result();
}
}
return QByteArray();
}
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