summaryrefslogtreecommitdiffstats
path: root/src/corelib/tools/qcryptographichash.cpp
diff options
context:
space:
mode:
authorMårten Nordheim <marten.nordheim@qt.io>2018-04-03 12:40:53 +0200
committerMårten Nordheim <marten.nordheim@qt.io>2018-04-10 12:17:43 +0000
commit5e7a64d1e321ddba751c0b18daf7920fde7c7de0 (patch)
tree8fc42dd4023135e99e7de90f39dfa8527db11926 /src/corelib/tools/qcryptographichash.cpp
parente027c7241f073f5fc8c1db88700cc83635b6454f (diff)
QCryptographicHash: Add a static method to retrieve hash length
It's useful when you need to check how long a hash will be without first generating one. [ChangeLog][QtCore][QCryptographicHash] Add a static method, hashLength, which returns the length of the output of a hash function in bytes. Change-Id: Id6a454016523de83d157fd95c50105c6db4bb1d9 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com> Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Diffstat (limited to 'src/corelib/tools/qcryptographichash.cpp')
-rw-r--r--src/corelib/tools/qcryptographichash.cpp40
1 files changed, 40 insertions, 0 deletions
diff --git a/src/corelib/tools/qcryptographichash.cpp b/src/corelib/tools/qcryptographichash.cpp
index a1b121f1ee..3c79bb797d 100644
--- a/src/corelib/tools/qcryptographichash.cpp
+++ b/src/corelib/tools/qcryptographichash.cpp
@@ -544,6 +544,46 @@ QByteArray QCryptographicHash::hash(const QByteArray &data, Algorithm method)
return hash.result();
}
+/*!
+ Returns the size of the output of the selected hash \a method in bytes.
+
+ \since 5.12
+*/
+int QCryptographicHash::hashLength(QCryptographicHash::Algorithm method)
+{
+ switch (method) {
+ case QCryptographicHash::Sha1:
+ return 20;
+#ifndef QT_CRYPTOGRAPHICHASH_ONLY_SHA1
+ case QCryptographicHash::Md4:
+ return 16;
+ case QCryptographicHash::Md5:
+ return 16;
+ case QCryptographicHash::Sha224:
+ return SHA224HashSize;
+ case QCryptographicHash::Sha256:
+ return SHA256HashSize;
+ case QCryptographicHash::Sha384:
+ return SHA384HashSize;
+ case QCryptographicHash::Sha512:
+ return SHA512HashSize;
+ case QCryptographicHash::RealSha3_224:
+ case QCryptographicHash::Keccak_224:
+ return 224 / 8;
+ case QCryptographicHash::RealSha3_256:
+ case QCryptographicHash::Keccak_256:
+ return 256 / 8;
+ case QCryptographicHash::RealSha3_384:
+ case QCryptographicHash::Keccak_384:
+ return 384 / 8;
+ case QCryptographicHash::RealSha3_512:
+ case QCryptographicHash::Keccak_512:
+ return 512 / 8;
+#endif
+ }
+ return 0;
+}
+
QT_END_NAMESPACE
#ifndef QT_NO_QOBJECT