RFR: 8255552: Add DES/3DES/MD5 to jdk.security.legacyAlgorithms [v5]

[Weijun Wang]

On Fri, 29 Apr 2022 19:42:27 GMT, Hai-May Chao <hchao at openjdk.org> wrote:

>> Please review these changes to add DES/3DES/MD5 to `jdk.security.legacyAlgorithms` security property, and to add the legacy algorithm constraint checking to `keytool` commands that are associated with secret key entries stored in the keystore. These `keytool` commands are -genseckey, -importpass, -list, and -importkeystore. As a result, `keytool` will be able to generate warnings when it detects that the secret key based algorithms and PBE based Mac and cipher algorithms are weak. Also removes the "This algorithm will be disabled in a future update.” from the existing warnings for the asymmetric keys/certificates.
>> Will also file a CSR.
>
> Hai-May Chao has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Updated spec in java.security

If one generates a secret key with `-keyalg des`, then the warning message also uses lowercase `des`. It probably should be standardized.

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PR: https://git.openjdk.java.net/jdk/pull/8300