Revert "Remove certs.h"

This reverts commit b8e4ae18cf24644fa8daea6add26ad33aa1e52a7.
diff --git a/include/mbedtls/certs.h b/include/mbedtls/certs.h
new file mode 100644
index 0000000..c617902
--- /dev/null
+++ b/include/mbedtls/certs.h
@@ -0,0 +1,106 @@
+/**
+ * \file certs.h
+ *
+ * \brief Sample certificates and DHM parameters for testing
+ */
+/*
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  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.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_CERTS_H
+#define MBEDTLS_CERTS_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(MBEDTLS_PEM_PARSE_C)
+/* Concatenation of all CA certificates in PEM format if available */
+extern const char   mbedtls_test_cas_pem[];
+extern const size_t mbedtls_test_cas_pem_len;
+#endif
+
+/* List of all CA certificates, terminated by NULL */
+extern const char * mbedtls_test_cas[];
+extern const size_t mbedtls_test_cas_len[];
+
+/*
+ * Convenience for users who just want a certificate:
+ * RSA by default, or ECDSA if RSA is not available
+ */
+extern const char * mbedtls_test_ca_crt;
+extern const size_t mbedtls_test_ca_crt_len;
+extern const char * mbedtls_test_ca_key;
+extern const size_t mbedtls_test_ca_key_len;
+extern const char * mbedtls_test_ca_pwd;
+extern const size_t mbedtls_test_ca_pwd_len;
+extern const char * mbedtls_test_srv_crt;
+extern const size_t mbedtls_test_srv_crt_len;
+extern const char * mbedtls_test_srv_key;
+extern const size_t mbedtls_test_srv_key_len;
+extern const char * mbedtls_test_cli_crt;
+extern const size_t mbedtls_test_cli_crt_len;
+extern const char * mbedtls_test_cli_key;
+extern const size_t mbedtls_test_cli_key_len;
+
+#if defined(MBEDTLS_ECDSA_C)
+extern const char   mbedtls_test_ca_crt_ec[];
+extern const size_t mbedtls_test_ca_crt_ec_len;
+extern const char   mbedtls_test_ca_key_ec[];
+extern const size_t mbedtls_test_ca_key_ec_len;
+extern const char   mbedtls_test_ca_pwd_ec[];
+extern const size_t mbedtls_test_ca_pwd_ec_len;
+extern const char   mbedtls_test_srv_crt_ec[];
+extern const size_t mbedtls_test_srv_crt_ec_len;
+extern const char   mbedtls_test_srv_key_ec[];
+extern const size_t mbedtls_test_srv_key_ec_len;
+extern const char   mbedtls_test_cli_crt_ec[];
+extern const size_t mbedtls_test_cli_crt_ec_len;
+extern const char   mbedtls_test_cli_key_ec[];
+extern const size_t mbedtls_test_cli_key_ec_len;
+#endif
+
+#if defined(MBEDTLS_RSA_C)
+extern const char   mbedtls_test_ca_crt_rsa[];
+extern const size_t mbedtls_test_ca_crt_rsa_len;
+extern const char   mbedtls_test_ca_key_rsa[];
+extern const size_t mbedtls_test_ca_key_rsa_len;
+extern const char   mbedtls_test_ca_pwd_rsa[];
+extern const size_t mbedtls_test_ca_pwd_rsa_len;
+extern const char   mbedtls_test_srv_crt_rsa[];
+extern const size_t mbedtls_test_srv_crt_rsa_len;
+extern const char   mbedtls_test_srv_key_rsa[];
+extern const size_t mbedtls_test_srv_key_rsa_len;
+extern const char   mbedtls_test_cli_crt_rsa[];
+extern const size_t mbedtls_test_cli_crt_rsa_len;
+extern const char   mbedtls_test_cli_key_rsa[];
+extern const size_t mbedtls_test_cli_key_rsa_len;
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* certs.h */
diff --git a/programs/test/cpp_dummy_build.cpp b/programs/test/cpp_dummy_build.cpp
index 81ca32c..c71ed79 100644
--- a/programs/test/cpp_dummy_build.cpp
+++ b/programs/test/cpp_dummy_build.cpp
@@ -38,6 +38,7 @@
 #include "mbedtls/bn_mul.h"
 #include "mbedtls/camellia.h"
 #include "mbedtls/ccm.h"
+#include "mbedtls/certs.h"
 #include "mbedtls/chacha20.h"
 #include "mbedtls/chachapoly.h"
 #include "mbedtls/check_config.h"
diff --git a/programs/test/query_config.c b/programs/test/query_config.c
index b6cbb09..29d7d84 100644
--- a/programs/test/query_config.c
+++ b/programs/test/query_config.c
@@ -47,6 +47,7 @@
 #include "mbedtls/blowfish.h"
 #include "mbedtls/camellia.h"
 #include "mbedtls/ccm.h"
+#include "mbedtls/certs.h"
 #include "mbedtls/chacha20.h"
 #include "mbedtls/chachapoly.h"
 #include "mbedtls/cipher.h"
diff --git a/scripts/data_files/query_config.fmt b/scripts/data_files/query_config.fmt
index 911900f..600f130 100644
--- a/scripts/data_files/query_config.fmt
+++ b/scripts/data_files/query_config.fmt
@@ -47,6 +47,7 @@
 #include "mbedtls/blowfish.h"
 #include "mbedtls/camellia.h"
 #include "mbedtls/ccm.h"
+#include "mbedtls/certs.h"
 #include "mbedtls/chacha20.h"
 #include "mbedtls/chachapoly.h"
 #include "mbedtls/cipher.h"
diff --git a/visualc/VS2010/mbedTLS.vcxproj b/visualc/VS2010/mbedTLS.vcxproj
index 33121bf..8b771bf 100644
--- a/visualc/VS2010/mbedTLS.vcxproj
+++ b/visualc/VS2010/mbedTLS.vcxproj
@@ -162,6 +162,7 @@
     <ClInclude Include="..\..\include\mbedtls\bn_mul.h" />

     <ClInclude Include="..\..\include\mbedtls\camellia.h" />

     <ClInclude Include="..\..\include\mbedtls\ccm.h" />

+    <ClInclude Include="..\..\include\mbedtls\certs.h" />

     <ClInclude Include="..\..\include\mbedtls\chacha20.h" />

     <ClInclude Include="..\..\include\mbedtls\chachapoly.h" />

     <ClInclude Include="..\..\include\mbedtls\check_config.h" />