[IVY-1554] Please add additional checksum algorithms

• Type: Improvement
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.5.0-rc1
• Component/s: Core
• Labels: security
• Assignee: Nicolas Lalevée
• Reporter: Andreas Felder
• Created: 24/Feb/17 08:06
• Updated: 21/May/17 17:31
• Resolved: 21/May/17 17:31

Description

Apache Ivy provides two algorithms (SHA-1 and MD5) to verify correctness of files in repository. MD5 is known to be unsafe for a while, which is no problem because also SHA-1 is suppported. As of yesterday SHA-1 is also broken (e.g. http://hackaday.com/2017/02/23/shattered-sha-1-is-broken/).

To ensure correctness of our artifacts, please extend those algorithms with SHA-256 and or SHA-512.

MessageDigests are computed in class
https://git-wip-us.apache.org/repos/asf?p=ant-ivy.git;a=blob;f=src/java/org/apache/ivy/util/ChecksumHelper.java;h=56aa936296fa9fbd9699432f041e06a9e588a618;hb=HEAD
using MessageDigest.getInstance(mdAlgorithm). It should be no problem to extend the list of allowed algorithms, because at least with JDK/JRE 6 SHA-512 is supported (see https://docs.oracle.com/javase/6/docs/technotes/guides/security/StandardNames.html#MessageDigest).

Issue Links

• links to: GitHub Pull Request #19