static unsafe string GetUsernameFromKeychainItemRef(IntPtr itemRef)
{
int[] formatConstants = { (int)CssmDbAttributeFormat.String };
int[] attributeTags = { (int)SecItemAttr.Account };
fixed(int *tags = attributeTags, formats = formatConstants)
{
var attributeInfo = new SecKeychainAttributeInfo {
Count = 1,
Tag = tags,
Format = formats
};
SecKeychainAttributeList *attributeList = null;
SecItemClass itemClass = 0;
try {
SecStatusCode status = SecKeychainItemCopyAttributesAndData(itemRef, &attributeInfo, ref itemClass, &attributeList, IntPtr.Zero, IntPtr.Zero);
if (status == SecStatusCode.ItemNotFound)
{
throw new Exception("Could not add internet password to keychain: " + status.GetStatusDescription());
}
if (status != SecStatusCode.Success)
{
throw new Exception("Could not find internet username and password: " + status.GetStatusDescription());
}
var userNameAttr = (SecKeychainAttribute *)attributeList->Attrs;
if (userNameAttr->Length == 0)
{
return(null);
}
return(Marshal.PtrToStringAuto(userNameAttr->Data, (int)userNameAttr->Length));
} finally {
SecKeychainItemFreeAttributesAndData(attributeList, IntPtr.Zero);
}
}
}
static extern unsafe OSStatus SecKeychainItemModifyAttributesAndData(IntPtr itemRef, SecKeychainAttributeList *attrList, uint length, byte [] data);
static extern unsafe OSStatus SecKeychainItemCreateFromContent(SecItemClass itemClass, SecKeychainAttributeList *attrList,
uint passwordLength, byte[] password, IntPtr keychain,
IntPtr initialAccess, ref IntPtr itemRef);
static extern unsafe OSStatus SecKeychainSearchCreateFromAttributes(IntPtr keychainOrArray, SecItemClass itemClass, SecKeychainAttributeList *attrList, out IntPtr searchRef);
static extern unsafe SecStatusCode SecKeychainItemFreeAttributesAndData(SecKeychainAttributeList *list, IntPtr data);
static unsafe SecKeychainAttribute *GetUsernameAttributeFromAttributeList(SecKeychainAttributeList *attributeList)
{
return((SecKeychainAttribute *)attributeList->Attrs);
}
