upload android base code part6

android/system/keymaster/hmac_operation.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SYSTEM_KEYMASTER_HMAC_OPERATION_H_
+#define SYSTEM_KEYMASTER_HMAC_OPERATION_H_
+
+#include "operation.h"
+
+#include <openssl/hmac.h>
+
+namespace keymaster {
+
+class HmacOperation : public Operation {
+  public:
+    HmacOperation(keymaster_purpose_t purpose, const uint8_t* key_data, size_t key_data_size,
+                  keymaster_digest_t digest, size_t mac_length, size_t min_mac_length);
+    ~HmacOperation();
+
+    virtual keymaster_error_t Begin(const AuthorizationSet& input_params,
+                                    AuthorizationSet* output_params);
+    virtual keymaster_error_t Update(const AuthorizationSet& additional_params, const Buffer& input,
+                                     AuthorizationSet* output_params, Buffer* output,
+                                     size_t* input_consumed);
+    virtual keymaster_error_t Abort();
+    virtual keymaster_error_t Finish(const AuthorizationSet& additional_params, const Buffer& input,
+                                     const Buffer& signature, AuthorizationSet* output_params,
+                                     Buffer* output);
+
+    keymaster_error_t error() { return error_; }
+
+  private:
+    HMAC_CTX ctx_;
+    keymaster_error_t error_;
+    const size_t mac_length_;
+    const size_t min_mac_length_;
+};
+
+/**
+ * Abstract base for HMAC operation factories.  This class does all of the work to create
+ * HMAC operations.
+ */
+class HmacOperationFactory : public OperationFactory {
+  public:
+    virtual KeyType registry_key() const { return KeyType(KM_ALGORITHM_HMAC, purpose()); }
+
+    virtual Operation* CreateOperation(const Key& key, const AuthorizationSet& begin_params,
+                                       keymaster_error_t* error);
+
+    virtual const keymaster_digest_t* SupportedDigests(size_t* digest_count) const;
+
+    virtual keymaster_purpose_t purpose() const = 0;
+};
+
+class HmacSignOperationFactory : public HmacOperationFactory {
+    keymaster_purpose_t purpose() const { return KM_PURPOSE_SIGN; }
+};
+
+class HmacVerifyOperationFactory : public HmacOperationFactory {
+    keymaster_purpose_t purpose() const { return KM_PURPOSE_VERIFY; }
+};
+
+}  // namespace keymaster
+
+#endif  // SYSTEM_KEYMASTER_HMAC_OPERATION_H_