Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurity_cdsa_utilities / lib / acl_prompted.cpp

diff --git a/Security/libsecurity_cdsa_utilities/lib/acl_prompted.cpp b/Security/libsecurity_cdsa_utilities/lib/acl_prompted.cpp
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+++ b/Security/libsecurity_cdsa_utilities/lib/acl_prompted.cpp
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+/*
+ * Copyright (c) 2000-2006,2011,2014 Apple Inc. All Rights Reserved.
+ * 
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+
+//
+// acl_prompted - password-based validation with out-of-band prompting.
+//
+#include <security_cdsa_utilities/acl_prompted.h>
+#include <security_utilities/debugging.h>
+#include <security_utilities/endian.h>
+#include <algorithm>
+
+
+//
+// Construct PromptedAclSubjects from prompts and optional data
+//
+PromptedAclSubject::PromptedAclSubject(Allocator &alloc,
+       const CssmData &prompt, const CssmData &password)
+       : SecretAclSubject(alloc, CSSM_ACL_SUBJECT_TYPE_PROMPTED_PASSWORD, password),
+         mPrompt(alloc, prompt) { }
+PromptedAclSubject::PromptedAclSubject(Allocator &alloc,
+       CssmManagedData &prompt, CssmManagedData &password)
+       : SecretAclSubject(alloc, CSSM_ACL_SUBJECT_TYPE_PROMPTED_PASSWORD, password),
+         mPrompt(alloc, prompt) { }
+PromptedAclSubject::PromptedAclSubject(Allocator &alloc,
+       const CssmData &prompt, bool cache)
+       : SecretAclSubject(alloc, CSSM_ACL_SUBJECT_TYPE_PROMPTED_PASSWORD, cache),
+         mPrompt(alloc, prompt) { }
+
+
+//
+// PromptedAclSubject will prompt for the secret
+//
+bool PromptedAclSubject::getSecret(const AclValidationContext &context,
+       const TypedList &subject, CssmOwnedData &secret) const
+{
+       if (Environment *env = context.environment<Environment>()) {
+               return env->getSecret(secret, mPrompt);
+       } else {
+               return false;
+       }
+}
+
+
+//
+// Make a copy of this subject in CSSM_LIST form
+//
+CssmList PromptedAclSubject::toList(Allocator &alloc) const
+{
+    // the password itself is private and not exported to CSSM
+       return TypedList(alloc, CSSM_ACL_SUBJECT_TYPE_PROMPTED_PASSWORD,
+               new(alloc) ListElement(alloc, mPrompt));
+}
+
+
+//
+// Create a PromptedAclSubject
+//
+PromptedAclSubject *PromptedAclSubject::Maker::make(const TypedList &list) const
+{
+    Allocator &alloc = Allocator::standard(Allocator::sensitive);
+       switch (list.length()) {
+       case 2:
+               {
+                       ListElement *elem[1];
+                       crack(list, 1, elem, CSSM_LIST_ELEMENT_DATUM);
+                       return new PromptedAclSubject(alloc, elem[0]->data(), true);
+               }
+       case 3:
+               {
+                       ListElement *elem[2];
+                       crack(list, 2, elem, CSSM_LIST_ELEMENT_DATUM, CSSM_LIST_ELEMENT_DATUM);
+                       return new PromptedAclSubject(alloc, elem[0]->data(), elem[1]->data());
+               }
+       default:
+               CssmError::throwMe(CSSM_ERRCODE_INVALID_ACL_SUBJECT_VALUE);
+       }
+}
+
+PromptedAclSubject *PromptedAclSubject::Maker::make(Version, Reader &pub, Reader &priv) const
+{
+    Allocator &alloc = Allocator::standard(Allocator::sensitive);
+    const void *data; size_t length; priv.countedData(data, length);
+       return new PromptedAclSubject(alloc, CssmAutoData(alloc, data, length), true);
+}
+
+
+//
+// Export the subject to a memory blob
+//
+void PromptedAclSubject::exportBlob(Writer::Counter &pub, Writer::Counter &priv)
+{
+       pub.countedData(mPrompt);
+}
+
+void PromptedAclSubject::exportBlob(Writer &pub, Writer &priv)
+{
+       pub.countedData(mPrompt);
+}
+
+
+#ifdef DEBUGDUMP
+
+void PromptedAclSubject::debugDump() const
+{
+       Debug::dump("Prompted-Password");
+       SecretAclSubject::debugDump();
+}
+
+#endif //DEBUGDUMP