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POKeychainItemWrapper migrating data throws error
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15639597
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2013-03-26T14:28:42.627
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2013-04-25T13:31:00.550
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2013-04-25T13:31:00.550
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Body
I'm using the ARCified <a href="https://gist.github.com/dhoerl/1170641" rel="nofollow"><code>KeychainItemWrapper</code></a> and having trouble migrating the data in one keychain item to another item. Basically I'm trying to copy the contents from an app specific item to a shared item. For brevity I've only put in the user name since it fails there. <pre><code>KeychainItemWrapper *legacyKeychainItem = [[KeychainItemWrapper alloc] initWithIdentifier:@"mainLogin" accessGroup:@"C35BXHSRSA.com.foo.bar"]; NSString *legacyUser = [legacyKeychainItem objectForKey:(__bridge id)kSecAttrAccount]; self.migratedKeychainItem = [[KeychainItemWrapper alloc] initWithIdentifier:@"security" accessGroup:@"C35BXHSRSA.com.foo.security"]; // dies here [self.migratedKeychainItem setObject:legacyUser forKey:(__bridge id)kSecAttrAccount]; </code></pre> It dies in the <code>KeychainItemWrapper</code> method <code>writeToKeychain</code> throwing <code>NSAssert( result == noErr, @"Couldn't update the Keychain Item." );</code> Looking up the error in the <a href="https://developer.apple.com/library/mac/#documentation/security/Reference/keychainservices/Reference/reference.html" rel="nofollow">Keychain Services Reference</a> tells me <blockquote> errSecDuplicateItem –25299 The item already exists. </blockquote> I can confirm this issue by hard coding/altering the string and the code works perfectly, but I'm trying to migrate data... so identical is important. The question is, why is this throwing an error when it's 2 different keychain items and how the heck do I get it to work as desired?
Tags
<ios><objective-c><keychain><keychainitemwrapper>
Title
KeychainItemWrapper migrating data throws error
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