Modifying Emacs to use the Mac OS X Keychain Services

[Ben Key <bkey76@gmail.com>]

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Hello,

I am still working on this task.  I did not finish it by Today as I
expected.

So far I am working on the ns-keychain-create-item function and the
ns-keychain-get-secret function.  I will add more functions as I go on.

For those who are wondering, here are some details on how I am implementing
these functions.

The ns-keychain-create-item function has the same parameters as
secrets-create-item (collection, item, password, and &rest attributes).  It
essentially just calls the Keychain Services API functions
SecKeychainAddGenericPassword to create the password and
SecKeychainItemModifyAttributesAndData to process the attributes.  When I
call SecKeychainAddGenericPassword I map the collection parameter to the
serviceName parameter, the item parameter to the accountName, and the
password parameter to the passwordData parameter.

The ns-keychain-get-secret function has the same parameters as
secrets-get-secret (collection and item) and it essentially just calls
SecKeychainFindGenericPassword and returns the retrieved passwordData
parameter.  Again, when calling SecKeychainFindGenericPassword I map the
collection parameter to the serviceName parameter and the item parameter to
the accountName parameter.

Since I can only work on this project on nights and weekends, it may take me
several weeks to complete this task.  As Daniel Colascione and Ted Zlatanov
recommended I am making the Keychain file the passwords used by Emacs a
configurable option that defaults to the default Keychain file.

Once I am finished with this task, I will post a patch to this list so that
the community can review it before I check it in.  It is my hope that this
patch will be ready in 3 weeks.

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