Security-55163.44.tar.gz

[apple/security.git] / libsecurity_cdsa_client / lib / cryptoclient.cpp

diff --git a/libsecurity_cdsa_client/lib/cryptoclient.cpp b/libsecurity_cdsa_client/lib/cryptoclient.cpp
new file mode 100644 (file)
index 0000000..e271f31
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+++ b/libsecurity_cdsa_client/lib/cryptoclient.cpp
@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
+ * 
+ * The contents of this file constitute Original Code as defined in and are
+ * subject to the Apple Public Source License Version 1.2 (the 'License').
+ * You may not use this file except in compliance with the License. Please obtain
+ * a copy of the License at http://www.apple.com/publicsource and read it before
+ * using this file.
+ * 
+ * This 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.
+ */
+
+
+//
+// cryptoclient - client interface to CSSM CSP encryption/decryption operations
+//
+#include <security_cdsa_client/cryptoclient.h>
+
+using namespace CssmClient;
+
+
+Crypt::Crypt(const CSP &csp, CSSM_ALGORITHMS alg)
+       : Context(csp, alg), mMode(CSSM_ALGMODE_NONE), mInitVector(NULL),
+         mPadding(CSSM_PADDING_NONE)
+{
+}
+
+void Crypt::key(const Key &key)
+{
+       mKey = key;
+       set(CSSM_ATTRIBUTE_KEY, static_cast<const CssmKey &>(key));
+}
+
+
+void
+Crypt::activate()
+{
+       if (!mActive)
+       {
+        // Key is required unless we have a NULL algorithm (cleartext wrap/unwrap),
+        // in which case we'll make a symmetric context (it shouldn't matter then).
+               if (!mKey && mAlgorithm != CSSM_ALGID_NONE)
+                       CssmError::throwMe(CSSMERR_CSP_MISSING_ATTR_KEY);
+               if (!mKey || mKey->keyClass() == CSSM_KEYCLASS_SESSION_KEY)
+               {       // symmetric key
+                       check(CSSM_CSP_CreateSymmetricContext(attachment()->handle(), mAlgorithm,
+                               mMode, neededCred(), mKey, mInitVector, mPadding, NULL,
+                               &mHandle));
+               }
+               else
+               {
+                       check(CSSM_CSP_CreateAsymmetricContext(attachment()->handle(), mAlgorithm,
+                               neededCred(), mKey, mPadding, &mHandle));
+                       //@@@ stick mode and initVector explicitly into the context?
+               }               
+               mActive = true;
+       }
+}
+
+
+//
+// Manage encryption contexts
+//
+CSSM_SIZE
+Encrypt::encrypt(const CssmData *in, uint32 inCount,
+                                               CssmData *out, uint32 outCount, CssmData &remData)
+{
+       unstaged();
+       CSSM_SIZE total;
+       check(CSSM_EncryptData(handle(), in, inCount, out, outCount, &total, &remData));
+       return total;
+}
+
+void
+Encrypt::init()
+{
+       check(CSSM_EncryptDataInit(handle()));
+       mStaged = true;
+}
+
+CSSM_SIZE
+Encrypt::encrypt(const CssmData *in, uint32 inCount,
+       CssmData *out, uint32 outCount)
+{
+       staged();
+       CSSM_SIZE total;
+       check(CSSM_EncryptDataUpdate(handle(), in, inCount, out, outCount, &total));
+       return total;
+}
+
+void
+Encrypt::final(CssmData &remData)
+{
+       staged();
+       check(CSSM_EncryptDataFinal(handle(), &remData));
+       mStaged = false;
+}
+
+
+//
+// Manage Decryption contexts
+//
+
+CSSM_SIZE
+Decrypt::decrypt(const CssmData *in, uint32 inCount,
+       CssmData *out, uint32 outCount, CssmData &remData)
+{
+       unstaged();
+       CSSM_SIZE total;
+       check(CSSM_DecryptData(handle(), in, inCount, out, outCount, &total, &remData));
+       return total;
+}
+
+void
+Decrypt::init()
+{
+       check(CSSM_DecryptDataInit(handle()));
+       mStaged = true;
+}
+
+CSSM_SIZE
+Decrypt::decrypt(const CssmData *in, uint32 inCount,
+       CssmData *out, uint32 outCount)
+{
+       staged();
+       CSSM_SIZE total;
+       check(CSSM_DecryptDataUpdate(handle(), in, inCount, out, outCount, &total));
+       return total;
+}
+
+void
+Decrypt::final(CssmData &remData)
+{
+       staged();
+       check(CSSM_DecryptDataFinal(handle(), &remData));
+       mStaged = false;
+}