diff -r 6856e071d25a -r d0aadddb9c64 MYKeychainItem.m
--- a/MYKeychainItem.m	Tue Jun 09 23:58:03 2009 -0700
+++ b/MYKeychainItem.m	Tue Jul 21 10:13:08 2009 -0700
@@ -8,6 +8,7 @@
 
 #import "MYKeychainItem.h"
 #import "MYCrypto_Private.h"
+#import "MYBERParser.h"
 #import "MYErrorUtils.h"
 
 
@@ -25,6 +26,9 @@
         _itemRef = itemRef;
         CFRetain(_itemRef);
         LogTo(INIT,@"%@, _itemRef=%@", [self class], itemRef);
+#if MYCRYPTO_USE_IPHONE_API
+        _isPersistent = YES;
+#endif
     }
     return self;
 }
@@ -32,6 +36,10 @@
 
 @synthesize keychainItemRef=_itemRef;
 
+#if MYCRYPTO_USE_IPHONE_API
+@synthesize isPersistent = _isPersistent;
+#endif
+
 - (void) dealloc
 {
     if (_itemRef) CFRelease(_itemRef);
@@ -71,7 +79,7 @@
 
 - (MYKeychain*) keychain {
 #if MYCRYPTO_USE_IPHONE_API
-    return [MYKeychain defaultKeychain];
+    return _isPersistent ? [MYKeychain defaultKeychain] : nil;
 #else
     MYKeychain *keychain = nil;
     SecKeychainRef keychainRef = NULL;
@@ -89,6 +97,8 @@
     OSStatus err;
 #if MYCRYPTO_USE_IPHONE_API
     err = SecItemDelete((CFDictionaryRef) $dict( {(id)kSecValueRef, (id)_itemRef} ));
+    if (!err)
+        _isPersistent = NO;
 #else
     err = SecKeychainItemDelete((SecKeychainItemRef)_itemRef);
     if (err==errSecInvalidItemRef)
@@ -98,6 +108,43 @@
 }
 
 
+/* (Not useful yet, as only password items have dates.)
+- (NSDate*) dateValueOfAttribute: (SecKeychainAttrType)attr {
+    NSString *dateStr = [self stringValueOfAttribute: attr];
+    if (dateStr.length == 0)
+        return nil;
+    NSDate *date = [MYBERGeneralizedTimeFormatter() dateFromString: dateStr];
+    if (!date)
+        Warn(@"MYKeychainItem: unable to parse date '%@'", dateStr);
+    return date;
+}
+
+- (void) setDateValue: (NSDate*)date ofAttribute: (SecKeychainAttrType)attr {
+    NSString *timeStr = nil;
+    if (date)
+        timeStr = [MYBERGeneralizedTimeFormatter() stringFromDate: date];
+    [self setValue: timeStr ofAttribute: attr];
+}
+
+
+- (NSDate*) creationDate {
+    return [self dateValueOfAttribute: kSecCreationDateItemAttr];
+}
+
+- (void) setCreationDate: (NSDate*)date {
+    [self setDateValue: date ofAttribute: kSecCreationDateItemAttr];
+}
+
+- (NSDate*) modificationDate {
+    return [self dateValueOfAttribute: kSecModDateItemAttr];
+}
+
+- (void) setModificationDate: (NSDate*)date {
+    [self setDateValue: date ofAttribute: kSecModDateItemAttr];
+}
+*/
+
+
 #pragma mark -
 #pragma mark DATA / METADATA ACCESSORS:
 
@@ -165,6 +212,10 @@
 }
 
 - (NSString*) stringValueOfAttribute: (SecKeychainAttrType)attr {
+#if MYCRYPTO_USE_IPHONE_API
+    if (!self.isPersistent)
+        return nil;
+#endif
     return [[self class] _getStringAttribute: attr ofItem: _itemRef];
 }