RFR: 8279064: New options for ktab to provide non-default salt

[Valerie Peng]

On Fri, 7 Jan 2022 19:35:56 GMT, Weijun Wang <weijun at openjdk.org> wrote:

> Please review this enhancement and its [CSR](https://bugs.openjdk.java.net/browse/JDK-8279632). Two new options `-s salt` and `-f` can be specified on the `ktab` command when adding entries.
> 
> I'm a little concerned about the compatibility risk described in the CSR, i.e. the `-f` option is already used in `ktab -d` to force removing entries. Hopefully not many people are writing their own wrappers on ktab that always include the `-f` option. I do want to be consistent with the naming in the MIT krb5 ktutil command.
> 
> Another thing worth mentioning is the [KerberosKey:<new>(KerberosPrincipal principal, char[] password, String algorithm)](https://github.com/openjdk/jdk/blob/3790e58090be25421e3e323eb29deea100b7608c/src/java.security.jgss/share/classes/javax/security/auth/kerberos/KerberosKey.java#L149) constructor which always uses the default salt. For consistency, it looks like a new constructor should be added that takes the salt string as a parameter as well. However, I don't intend to add it as I cannot see a proper usage for it. In fact, I now regret adding the constructor linked above.

src/java.security.jgss/windows/classes/sun/security/krb5/internal/tools/Ktab.java line 2:

> 1: /*
> 2:  * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved.

2022

src/java.security.jgss/windows/classes/sun/security/krb5/internal/tools/Ktab.java line 457:

> 455:         System.out.println("-l [-e] [-t]\n"
> 456:                 + "    list the keytab name and entries. -e with etype, -t with timestamp.");
> 457:         System.out.println("-a <principal name> [<password>] [-s <salt>] [-n <kvno>] [-f | -s <salt>] [-append]\n"

The first [-s <salt\>] looks redundant? Hmm, I edited your CSR from [-s <salt\>] to [-s <salt\> | -f]. Maybe you want to change that to be consistent with what you have here.

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PR: https://git.openjdk.java.net/jdk/pull/6991