August 2011
Intermediate to advanced
552 pages
23h 48m
English
Content preview from Advanced Mac OS X Programming: The Big Nerd Ranch GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Keychain Access
Each keychain item defines how it may be accessed. The information about access privileges is kept in a SecAccessRef structure. To get the access structure for a particular keychain item, you use the following function:
OSStatus SecKeychainItemCopyAccess (SecKeychainItemRef item,
SecAccessRef *access);
To change the access on a keychain item, you edit the SecAccessRef and write it to the keychain item using:
OSStatus SecKeychainItemSetAccess (SecKeychainItemRef item,
SecAccessRef access);
What, then, is a SecAccessRef? You can get a list of access control lists (ACLs) from it. Each access list has a list of trusted applications that are allowed to access the keychain item. Some applications can access the keychain item only ...
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