If a tar were constructed with duplicate file names, then depending on
the order, it could result in same tarsum.
Signed-off-by: Vincent Batts <vbatts@redhat.com>
Tarsum now correctly closes the internal TarWriter which appends
a block of 1024 zeros to the end of the returned archive.
Signed-off-by: Josh Hawn <josh.hawn@docker.com>
this is to enhance the tarsum algorithm, but _MUST_ be done in lock step
with the same for docker-registry. (PR will be cited)
Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)
This introduces Versions for TarSum checksums.
Fixes: https://github.com/docker/docker/issues/7526
It preserves current functionality and abstracts the interface for
future flexibility of hashing algorithms. As a POC, the VersionDev
Tarsum does not include the mtime in the checksum calculation, and would
solve https://github.com/docker/docker/issues/7387 though this is not a
settled Version is subject to change until a version number is assigned.
Signed-off-by: Vincent Batts <vbatts@redhat.com>
This commit makes tarsum buffer allocation dynamic. This change
is required to avoid allocating memory excessively after the archive
buffering changes.
Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
This code is vital to the security of the project and it is important
we assure it is well-maintained and guarded.
I am vested in assuring this code maintains security and
provides as much compatibility as possible between releases.
Signed-off-by: Eric Windisch <eric@windisch.us>
