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https://issues.apache.org/jira/browse/DERBY-866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13178773#comment-13178773
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Rick Hillegas commented on DERBY-866:
-------------------------------------
Thanks for looking at the patch, Knut. I'm not understanding the problem you
have found with it. I tried to separate the hashed result from the inputs to
the hashing algorithm. For BUILTIN passwords, the inputs continue to be
concatenated with the hashed password. However, for NATIVE authentication, the
inputs are stored in SYSUSERS.HASHINGSCHEME and the hashed result is stored in
SYSUSERS.PASSWORD. The inputs should not be concatenated to the result in
SYSUSERS.PASSWORD. If they are, I have indeed made a mistake. The idea is that
when verifying a NATIVE password, we will perform the following steps:
1) The connecting user supplies a username and password.
2) Derby keys into SYSUSERS using the supplied username and looks up the
corresponding HASHINGSCHEME inputs and PASSWORD result.
3) Derby constructs a PasswordHasher from the inputs encoded in HASHINGSCHEME.
4) Then Derby runs the supplied username and password through the
PasswordHasher to produce a candidate hashed password.
5) Derby compares the candidate hashed password to the PASSWORD retrieved in
step (2). If they are identical, then authentication succeeds.
The following script output seems to verify to me that the NATIVE hashed
PASSWORD does not contain the inputs to the hashing algorithm, unlike the
BUILTIN analog. Does this help clear up the confusion or do you still see a
problem here? Thanks.
ij> connect
'jdbc:derby:memory:db;create=true;user=test_dbo;password=test_dbopassword';
ij> call syscs_util.syscs_create_user( 'TEST_DBO', 'test_dbopassword' );
0 rows inserted/updated/deleted
ij> call syscs_util.syscs_set_database_property( 'derby.user.TEST_DBO',
'test_dbopassword' );
0 rows inserted/updated/deleted
ij> select hashingscheme, password from sys.sysusers;
HASHINGSCHEME
|PASSWORD
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
3b62:07751aa502a988a6b604d3865997a0e9:1000:SHA-256
|dc0bfe6c3f705699cb6ff0ad7bf0ee815ab818cac3e8bd65851cdeab3c9b8faf
1 row selected
ij> values syscs_util.syscs_get_database_property( 'derby.user.TEST_DBO' );
1
--------------------------------------------------------------------------------------------------------------------------------
3b62412e6e60e4e47c6aa6fcdc61a168ef737b99ec5c479b171934355f11536dbdf9:442941b76338dfc6e5cf2daa31b5b062:1000:SHA-256
1 row selected
ij> select length( hashingscheme ), length( password ) from sys.sysusers;
1 |2
-----------------------
50 |64
1 row selected
ij> values length( syscs_util.syscs_get_database_property(
'derby.user.TEST_DBO' ) );
1
-----------
114
1 row selected
> Derby User Management Enhancements
> ----------------------------------
>
> Key: DERBY-866
> URL: https://issues.apache.org/jira/browse/DERBY-866
> Project: Derby
> Issue Type: Improvement
> Components: Services
> Affects Versions: 10.2.1.6
> Reporter: Francois Orsini
> Assignee: Rick Hillegas
> Attachments: Derby_User_Enhancement.html,
> Derby_User_Enhancement_v1.1.html, DummyAuthenticator.java,
> UserManagement.html, UserManagement.html, UserManagement.html,
> UserManagement.html, derby-866-01-aa-sysusers.diff,
> derby-866-01-ab-sysusers.diff, derby-866-02-ag-createDropUser.diff,
> derby-866-03-aa-resetModifyPassword.diff,
> derby-866-03-ab-resetModifyPassword.diff, derby-866-04-aa-fixRolesTest.diff,
> derby-866-05-aa-grantRevoke.diff, derby-866-06-aa-upgradeFrom10.1.diff,
> derby-866-07-aa-removeSQLPassword.diff, derby-866-08-aa-passwordHasher.diff,
> derby-866-08-ab-passwordHasher.diff, dummyCredentials.properties
>
>
> Proposal to enhance Derby's Built-In DDL User Management. (See proposal spec
> attached to the JIRA).
> Abstract:
> This feature aims at improving the way BUILT-IN users are managed in Derby by
> providing a more intuitive and familiar DDL interface. Currently (in
> 10.1.2.1), Built-In users can be defined at the system and/or database level.
> Users created at the system level can be defined via JVM or/and Derby system
> properties in the derby.properties file. Built-in users created at the
> database level are defined via a call to a Derby system procedure
> (SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY) which sets a database property.
> Defining a user at the system level is very convenient and practical during
> the development phase (EOD) of an application - However, the user's password
> is not encrypted and consequently appears in clear in the derby.properties
> file. Hence, for an application going into production, whether it is embedded
> or not, it is preferable to create users at the database level where the
> password is encrypted.
> There is no real ANSI SQL standard for managing users in SQL but by providing
> a more intuitive and known interface, it will ease Built-In User management
> at the database level as well as Derby's adoption.
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