X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/b1ab9ed8d0e0f1c3b66d7daa8fd5564444c56195..420ff9d9379a8d93f2c90f026a797bdea1eb4517:/libsecurity_cdsa_client/lib/macclient.cpp?ds=inline

diff --git a/libsecurity_cdsa_client/lib/macclient.cpp b/libsecurity_cdsa_client/lib/macclient.cpp
index 38c8b6a7..c821cc99 100644
--- a/libsecurity_cdsa_client/lib/macclient.cpp
+++ b/libsecurity_cdsa_client/lib/macclient.cpp
@@ -29,14 +29,18 @@ using namespace CssmClient;
 //
 void MacContext::activate()
 {
-	if (!mActive) 
-	{
-		check(CSSM_CSP_CreateMacContext(attachment()->handle(), mAlgorithm,
-			  mKey, &mHandle));
-		mActive = true;
-		if (cred())
-			cred(cred());		// install explicitly
-	}
+    {
+        StLock<Mutex> _(mActivateMutex);
+        if (!mActive) 
+        {
+            check(CSSM_CSP_CreateMacContext(attachment()->handle(), mAlgorithm,
+                  mKey, &mHandle));
+            mActive = true;
+        }
+    }
+
+    if (cred())
+        cred(cred());		// install explicitly
 }