upload android base code part6

android/system/keymaster/rsa_key.h

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+/*
+ * 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_RSA_KEY_H_
+#define SYSTEM_KEYMASTER_RSA_KEY_H_
+
+#include <openssl/rsa.h>
+
+#include "asymmetric_key.h"
+
+namespace keymaster {
+
+class RsaKey : public AsymmetricKey {
+  public:
+    RsaKey(const AuthorizationSet& hw_enforced, const AuthorizationSet& sw_enforced,
+           keymaster_error_t* error)
+        : AsymmetricKey(hw_enforced, sw_enforced, error) {}
+
+    bool InternalToEvp(EVP_PKEY* pkey) const override;
+    bool EvpToInternal(const EVP_PKEY* pkey) override;
+
+    bool SupportedMode(keymaster_purpose_t purpose, keymaster_padding_t padding);
+    bool SupportedMode(keymaster_purpose_t purpose, keymaster_digest_t digest);
+
+    struct RSA_Delete {
+        void operator()(RSA* p) { RSA_free(p); }
+    };
+
+    RSA* key() const { return rsa_key_.get(); }
+
+  protected:
+    RsaKey(RSA* rsa, const AuthorizationSet& hw_enforced, const AuthorizationSet& sw_enforced,
+           keymaster_error_t* error)
+        : AsymmetricKey(hw_enforced, sw_enforced, error), rsa_key_(rsa) {}
+
+  private:
+    UniquePtr<RSA, RSA_Delete> rsa_key_;
+};
+
+}  // namespace keymaster
+
+#endif  // SYSTEM_KEYMASTER_RSA_KEY_H_