From f1b500d3e09f77ca5e6c0dfdb87fb7df4c5514a5 Mon Sep 17 00:00:00 2001
From: Christian Kamm <mail@ckamm.de>
Date: Thu, 15 Oct 2015 09:39:49 +0200
Subject: [PATCH] Checksum: Add env variables to disable #3735

---
 src/libsync/propagatedownload.cpp             |  6 +++++-
 src/libsync/propagateupload.cpp               |  3 +++
 src/libsync/transmissionchecksumvalidator.cpp | 12 ++++++++++++
 src/libsync/transmissionchecksumvalidator.h   |  6 ++++++
 4 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/libsync/propagatedownload.cpp b/src/libsync/propagatedownload.cpp
index 5fd94da66..1f0a1b7b2 100644
--- a/src/libsync/propagatedownload.cpp
+++ b/src/libsync/propagatedownload.cpp
@@ -537,7 +537,11 @@ void PropagateDownloadFileQNAM::slotGetFinished()
     ValidateChecksumHeader *validator = new ValidateChecksumHeader(this);
     connect(validator, SIGNAL(validated(QByteArray)), this, SLOT(downloadFinished(QByteArray)));
     connect(validator, SIGNAL(validationFailed(QString)), this, SLOT(slotChecksumFail(QString)));
-    validator->start(_tmpFile.fileName(), job->reply()->rawHeader(checkSumHeaderC));
+    auto checksumHeader = job->reply()->rawHeader(checkSumHeaderC);
+    if (!downloadChecksumEnabled()) {
+        checksumHeader.clear();
+    }
+    validator->start(_tmpFile.fileName(), checksumHeader);
 }
 
 void PropagateDownloadFileQNAM::slotChecksumFail( const QString& errMsg )
diff --git a/src/libsync/propagateupload.cpp b/src/libsync/propagateupload.cpp
index c2b073082..a745d4675 100644
--- a/src/libsync/propagateupload.cpp
+++ b/src/libsync/propagateupload.cpp
@@ -237,6 +237,9 @@ void PropagateUploadFileQNAM::start()
             computeChecksum->setChecksumType(supportedChecksumTypes.first());
         }
     }
+    if (!uploadChecksumEnabled()) {
+        computeChecksum->setChecksumType(QByteArray());
+    }
 
     connect(computeChecksum, SIGNAL(done(QByteArray,QByteArray)),
             SLOT(slotStartUpload(QByteArray,QByteArray)));
diff --git a/src/libsync/transmissionchecksumvalidator.cpp b/src/libsync/transmissionchecksumvalidator.cpp
index b598149c2..21653fc51 100644
--- a/src/libsync/transmissionchecksumvalidator.cpp
+++ b/src/libsync/transmissionchecksumvalidator.cpp
@@ -49,6 +49,18 @@ bool parseChecksumHeader(const QByteArray& header, QByteArray* type, QByteArray*
     return true;
 }
 
+bool uploadChecksumEnabled()
+{
+    static bool enabled = qgetenv("OWNCLOUD_DISABLE_CHECKSUM_UPLOAD").isEmpty();
+    return enabled;
+}
+
+bool downloadChecksumEnabled()
+{
+    static bool enabled = qgetenv("OWNCLOUD_DISABLE_CHECKSUM_DOWNLOAD").isEmpty();
+    return enabled;
+}
+
 ComputeChecksum::ComputeChecksum(QObject* parent)
     : QObject(parent)
 {
diff --git a/src/libsync/transmissionchecksumvalidator.h b/src/libsync/transmissionchecksumvalidator.h
index ef1792d81..b8f10223f 100644
--- a/src/libsync/transmissionchecksumvalidator.h
+++ b/src/libsync/transmissionchecksumvalidator.h
@@ -29,6 +29,12 @@ QByteArray makeChecksumHeader(const QByteArray& checksumType, const QByteArray&
 /// Parses a checksum header
 bool parseChecksumHeader(const QByteArray& header, QByteArray* type, QByteArray* checksum);
 
+/// Checks OWNCLOUD_DISABLE_CHECKSUM_UPLOAD
+bool uploadChecksumEnabled();
+
+/// Checks OWNCLOUD_DISABLE_CHECKSUM_DOWNLOAD
+bool downloadChecksumEnabled();
+
 /**
  * Computes the checksum of a file.
  * \ingroup libsync
-- 
2.30.2