8368984: Extra slashes in Cipher transformation leads to NSPE instead of NSAE

[valeriepeng]

This PR updates the cipher transformation parsing and verification logic to be stricter and throws NoSuchAlgorithmException (NSAE) when additional slash(es) is found. With the existing parsing logic, the extra slash(es) is likely to end up in the last component, i.e. the padding scheme, and lead to NoSuchPaddingException (NSPE) from the underlying CipherSpi object.

Out of the supported cipher algorithms for all JDK providers, PBES2 cipher algorithms and RSA cipher with OAEP paddings may contain truncated SHA-512 in their transformations. This proposed fix would check for truncated SHA in both algorithm and padding schemes and throws NSAE if any extra slash is found.

Thanks in advance for the review~

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8368984: Extra slashes in Cipher transformation leads to NSPE instead of NSAE (Bug - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/27615/head:pull/27615
$ git checkout pull/27615

Update a local copy of the PR:
$ git checkout pull/27615
$ git pull https://git.openjdk.org/jdk.git pull/27615/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 27615

View PR using the GUI difftool:
$ git pr show -t 27615

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/27615.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back valeriep! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

@valeriepeng The following label will be automatically applied to this pull request:

• security

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 00: Full (65c4ca6f)

[wangweij]

The logic is quite complex. Can you create a dedicated method for it like indexOfRealSlashIn(String s)?

We can even call it on the mode part.