upload android base code part6

android/system/keymaster/openssl_utils.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_OPENSSL_UTILS_H_
+#define SYSTEM_KEYMASTER_OPENSSL_UTILS_H_
+
+#include <openssl/bn.h>
+#include <openssl/ec.h>
+#include <openssl/engine.h>
+#include <openssl/evp.h>
+#include <openssl/rsa.h>
+#include <openssl/x509.h>
+
+#include <keymaster/UniquePtr.h>
+
+#include <hardware/keymaster_defs.h>
+
+namespace keymaster {
+
+struct KeymasterKeyBlob;
+
+class EvpMdCtxCleaner {
+  public:
+    explicit EvpMdCtxCleaner(EVP_MD_CTX* ctx) : ctx_(ctx) {}
+    ~EvpMdCtxCleaner() { EVP_MD_CTX_cleanup(ctx_); }
+
+  private:
+    EVP_MD_CTX* ctx_;
+};
+
+template <typename T, void (*FreeFunc)(T*)> struct OpenSslObjectDeleter {
+    void operator()(T* p) { FreeFunc(p); }
+};
+
+#define DEFINE_OPENSSL_OBJECT_POINTER(name)                                                        \
+    typedef OpenSslObjectDeleter<name, name##_free> name##_Delete;                                 \
+    typedef UniquePtr<name, name##_Delete> name##_Ptr;
+
+DEFINE_OPENSSL_OBJECT_POINTER(ASN1_BIT_STRING)
+DEFINE_OPENSSL_OBJECT_POINTER(ASN1_INTEGER)
+DEFINE_OPENSSL_OBJECT_POINTER(ASN1_OBJECT)
+DEFINE_OPENSSL_OBJECT_POINTER(ASN1_OCTET_STRING)
+DEFINE_OPENSSL_OBJECT_POINTER(ASN1_TIME)
+DEFINE_OPENSSL_OBJECT_POINTER(BN_CTX)
+DEFINE_OPENSSL_OBJECT_POINTER(EC_GROUP)
+DEFINE_OPENSSL_OBJECT_POINTER(EC_KEY)
+DEFINE_OPENSSL_OBJECT_POINTER(EC_POINT)
+DEFINE_OPENSSL_OBJECT_POINTER(ENGINE)
+DEFINE_OPENSSL_OBJECT_POINTER(EVP_PKEY)
+DEFINE_OPENSSL_OBJECT_POINTER(PKCS8_PRIV_KEY_INFO)
+DEFINE_OPENSSL_OBJECT_POINTER(RSA)
+DEFINE_OPENSSL_OBJECT_POINTER(X509)
+DEFINE_OPENSSL_OBJECT_POINTER(X509_EXTENSION)
+DEFINE_OPENSSL_OBJECT_POINTER(X509_NAME)
+
+typedef OpenSslObjectDeleter<BIGNUM, BN_free> BIGNUM_Delete;
+typedef UniquePtr<BIGNUM, BIGNUM_Delete> BIGNUM_Ptr;
+
+keymaster_error_t ec_get_group_size(const EC_GROUP* group, size_t* key_size_bits);
+EC_GROUP* ec_get_group(keymaster_ec_curve_t curve);
+
+/**
+ * Many OpenSSL APIs take ownership of an argument on success but don't free the argument on
+ * failure. This means we need to tell our scoped pointers when we've transferred ownership, without
+ * triggering a warning by not using the result of release().
+ */
+template <typename T, typename Delete_T>
+inline void release_because_ownership_transferred(UniquePtr<T, Delete_T>& p) {
+    T* val __attribute__((unused)) = p.release();
+}
+
+keymaster_error_t convert_pkcs8_blob_to_evp(const uint8_t* key_data, size_t key_length,
+                                            keymaster_algorithm_t expected_algorithm,
+                                            UniquePtr<EVP_PKEY, EVP_PKEY_Delete>* pkey);
+
+keymaster_error_t KeyMaterialToEvpKey(keymaster_key_format_t key_format,
+                                      const KeymasterKeyBlob& key_material,
+                                      keymaster_algorithm_t expected_algorithm,
+                                      UniquePtr<EVP_PKEY, EVP_PKEY_Delete>* evp_pkey);
+
+keymaster_error_t EvpKeyToKeyMaterial(const EVP_PKEY* evp_pkey, KeymasterKeyBlob* key_blob);
+
+size_t ec_group_size_bits(EC_KEY* ec_key);
+
+}  // namespace keymaster
+
+#endif  // SYSTEM_KEYMASTER_OPENSSL_UTILS_H_