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Re: Keychain access crashing on SecKeychainFindGenericPassword




On Jul 28, 2008, at 1:25 AM, Ken McLeod wrote:

Technically, nothing is stored in the keychain access application itself. Management of the data in a keychain is handled by the OS. Other applications would be able to store and retrieve keychain items even if you removed the Keychain Access application completely.

True, I knew that but should have phrased it better. :-p

One problem here is that [key length] returns the length of the string in characters, not bytes. However, the SecKeychainFindGenericPassword function requires the length to be passed in bytes, not characters. (Characters other than plain ASCII may use more than 1 byte when represented in UTF-8.) Since this function doesn't do partial string matches, if you ask for the wrong length, you'll fail to match the item. Use strlen() to get the length in bytes of a UTF-8 encoded string.

Ah good point, that's what I get for not being more internationally- conscious. Thanks for pointing that out, I'm sure it'll save me headaches in the future.


When you see a program hung in mach_msg_trap(), it's waiting for a Mach IPC reply from another program. In this case, it's waiting for securityd to return the decrypted data of the item that was found. This suggests that securityd itself is hung or no longer running, which is definitely a problem.

Did my email where I pasted the stack trace for securityd not get posted? I replied to myself, are those emails filtered out for some reason?


As Perry noted in an earlier message, there is a known issue where securityd can get into a bad state when its code equivalence database (in /var/db/CodeEquivalenceDatabase) is corrupt. Try moving that file aside and rebooting.

-ken

Yup, that was what the problem was (I guess my reply to him didn't make it into your box). Thanks for the tips!


- Greg

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References: 
 >Keychain access crashing on SecKeychainFindGenericPassword (From: Greg <email@hidden>)
 >Re: Keychain access crashing on SecKeychainFindGenericPassword (From: Ken McLeod <email@hidden>)



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