[gnome-keyring] [pkcs11] Fix assertion when comparing attributes.

[Stefan Walter <stefw src gnome org>]

commit 72db76cd8696192433f24b17cf0d76d5809aa6bf
Author: Stef Walter <stef memberwebs com>
Date:   Mon Nov 9 22:23:44 2009 +0000

    [pkcs11] Fix assertion when comparing attributes.
    
    When comparing attributes that both had zero lengths, but one
    had a null pointer, gck_attribute_equal() used to assert.

 pkcs11/gck/gck-attributes.c             |    4 +++-
 pkcs11/gck/tests/unit-test-attributes.c |    7 +++++++
 2 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/pkcs11/gck/gck-attributes.c b/pkcs11/gck/gck-attributes.c
index 3b48665..f609792 100644
--- a/pkcs11/gck/gck-attributes.c
+++ b/pkcs11/gck/gck-attributes.c
@@ -245,7 +245,9 @@ gck_attribute_equal (gconstpointer v1, gconstpointer v2)
 		return FALSE;
 	if (a1->pValue == a2->pValue)
 		return TRUE;
-	
+	if (a1->ulValueLen == 0)
+		return TRUE;
+
 	g_assert (a1->pValue);
 	g_assert (a2->pValue);
 	
diff --git a/pkcs11/gck/tests/unit-test-attributes.c b/pkcs11/gck/tests/unit-test-attributes.c
index d8cba87..c56e1b0 100644
--- a/pkcs11/gck/tests/unit-test-attributes.c
+++ b/pkcs11/gck/tests/unit-test-attributes.c
@@ -25,6 +25,13 @@
 
 #include "gck/gck-attributes.h"
 
+DEFINE_TEST(attribute_equal_zero_len_null_ptr)
+{
+	CK_ATTRIBUTE attr1 = { CKA_LABEL, "", 0 };
+	CK_ATTRIBUTE attr2 = { CKA_LABEL, NULL, 0 };
+	g_assert (gck_attribute_equal (&attr1, &attr2));
+}
+
 DEFINE_TEST(attribute_consume)
 {
 	CK_ATTRIBUTE attr;