diff --git a/bmc-vmi-ca/ca_certs_manager.cpp b/bmc-vmi-ca/ca_certs_manager.cpp
new file mode 100644
index 0000000..f6622ff
--- /dev/null
+++ b/bmc-vmi-ca/ca_certs_manager.cpp
@@ -0,0 +1,71 @@
+#include "config.h"
+
+#include "ca_certs_manager.hpp"
+
+#include <filesystem>
+#include <fstream>
+#include <phosphor-logging/elog-errors.hpp>
+#include <phosphor-logging/elog.hpp>
+#include <phosphor-logging/log.hpp>
+#include <xyz/openbmc_project/Common/error.hpp>
+
+namespace ca
+{
+namespace cert
+{
+static constexpr auto objectEntry = "/xyz/openbmc_project/certs/entry";
+static constexpr auto maxCertSize = 4096;
+namespace fs = std::filesystem;
+using namespace phosphor::logging;
+using InvalidArgument =
+    sdbusplus::xyz::openbmc_project::Common::Error::InvalidArgument;
+using Argument = xyz::openbmc_project::Common::InvalidArgument;
+
+sdbusplus::message::object_path CACertMgr::signCSR(std::string csr)
+{
+    std::string objPath;
+    try
+    {
+        if (csr.size() > maxCertSize)
+        {
+            log<level::ERR>("Invalid CSR size");
+            elog<InvalidArgument>(Argument::ARGUMENT_NAME("CSR"),
+                                  Argument::ARGUMENT_VALUE(csr.c_str()));
+        }
+        auto id = lastEntryId + 1;
+        objPath = fs::path(objectEntry) / std::to_string(id);
+        std::string cert;
+        // Creating the dbus object here with the empty certificate string
+        // actual signing is being done by the hypervisor, once it signs then
+        // the certificate string would be updated with actual certificate.
+        entries.insert(std::make_pair(
+            id, std::make_unique<Entry>(bus, objPath, id, csr, cert, *this)));
+        lastEntryId++;
+    }
+    catch (const std::invalid_argument& e)
+    {
+        log<level::ERR>(e.what());
+        elog<InvalidArgument>(Argument::ARGUMENT_NAME("csr"),
+                              Argument::ARGUMENT_VALUE(csr.c_str()));
+    }
+    return objPath;
+}
+
+void CACertMgr::erase(uint32_t entryId)
+{
+    entries.erase(entryId);
+}
+
+void CACertMgr::deleteAll()
+{
+    auto iter = entries.begin();
+    while (iter != entries.end())
+    {
+        auto& entry = iter->second;
+        ++iter;
+        entry->delete_();
+    }
+}
+
+} // namespace cert
+} // namespace ca