Make a proper wrapper in util for SQLite3, update the TLS session

manager to use it. Add --with-sqlite to configure.py

3 files changed, 220 insertions, 0 deletions

diff --git a/src/utils/sqlite/info.txt b/src/utils/sqlite/info.txt
new file mode 100644
index 000000000..9b2fe575d
--- /dev/null
+++ b/src/utils/sqlite/info.txt
@@ -0,0 +1,14 @@
+
+load_on request
+
+<libs>
+all -> sqlite3
+</libs>
+
+<header:internal>
+sqlite.h
+</header:internal>
+
+<source>
+sqlite.cpp
+</source>
diff --git a/src/utils/sqlite/sqlite.cpp b/src/utils/sqlite/sqlite.cpp
new file mode 100644
index 000000000..b78112e28
--- /dev/null
+++ b/src/utils/sqlite/sqlite.cpp
@@ -0,0 +1,138 @@
+/*
+* SQLite wrapper
+* (C) 2012 Jack Lloyd
+*
+* Released under the terms of the Botan license
+*/
+
+#include <botan/internal/sqlite.h>
+#include <botan/internal/assert.h>
+#include <stdexcept>
+#include <sqlite3.h>
+
+namespace Botan {
+
+sqlite3_database::sqlite3_database(const std::string& db_filename)
+   {
+   int rc = ::sqlite3_open(db_filename.c_str(), &m_db);
+
+   if(rc)
+      {
+      const std::string err_msg = ::sqlite3_errmsg(m_db);
+      ::sqlite3_close(m_db);
+      m_db = nullptr;
+      throw std::runtime_error("sqlite3_open failed - " + err_msg);
+      }
+   }
+
+sqlite3_database::~sqlite3_database()
+   {
+   if(m_db)
+      ::sqlite3_close(m_db);
+   m_db = nullptr;
+   }
+
+size_t sqlite3_database::row_count(const std::string& table_name)
+   {
+   sqlite3_statement stmt(this, "select count(*) from " + table_name);
+
+   if(stmt.step())
+      return stmt.get_size_t(0);
+   else
+      throw std::runtime_error("Querying size of table " + table_name + " failed");
+   }
+
+void sqlite3_database::create_table(const std::string& table_schema)
+   {
+   char* errmsg = 0;
+   int rc = ::sqlite3_exec(m_db, table_schema.c_str(), 0, 0, &errmsg);
+
+   if(rc != SQLITE_OK)
+      {
+      const std::string err_msg = errmsg;
+      ::sqlite3_free(errmsg);
+      ::sqlite3_close(m_db);
+      m_db = nullptr;
+      throw std::runtime_error("sqlite3_exec for table failed - " + err_msg);
+      }
+   }
+
+
+sqlite3_statement::sqlite3_statement(sqlite3_database* db, const std::string& base_sql)
+   {
+   int rc = ::sqlite3_prepare_v2(db->m_db, base_sql.c_str(), -1, &m_stmt, 0);
+
+   if(rc != SQLITE_OK)
+      throw std::runtime_error("sqlite3_prepare failed " + base_sql +
+                               ", code " + std::to_string(rc));
+   }
+
+void sqlite3_statement::bind(int column, const std::string& val)
+   {
+   int rc = ::sqlite3_bind_text(m_stmt, column, val.c_str(), -1, SQLITE_TRANSIENT);
+   if(rc != SQLITE_OK)
+      throw std::runtime_error("sqlite3_bind_text failed, code " + std::to_string(rc));
+   }
+
+void sqlite3_statement::bind(int column, int val)
+   {
+   int rc = ::sqlite3_bind_int(m_stmt, column, val);
+   if(rc != SQLITE_OK)
+      throw std::runtime_error("sqlite3_bind_int failed, code " + std::to_string(rc));
+   }
+
+void sqlite3_statement::bind(int column, std::chrono::system_clock::time_point time)
+   {
+   const int timeval = std::chrono::duration_cast<std::chrono::seconds>(time.time_since_epoch()).count();
+   bind(column, timeval);
+   }
+
+void sqlite3_statement::bind(int column, const std::vector<byte>& val)
+   {
+   int rc = ::sqlite3_bind_blob(m_stmt, column, &val[0], val.size(), SQLITE_TRANSIENT);
+   if(rc != SQLITE_OK)
+      throw std::runtime_error("sqlite3_bind_text failed, code " + std::to_string(rc));
+   }
+
+std::pair<const byte*, size_t> sqlite3_statement::get_blob(int column)
+   {
+   BOTAN_ASSERT(::sqlite3_column_type(m_stmt, 0) == SQLITE_BLOB,
+                "Return value is a blob");
+
+   const void* session_blob = ::sqlite3_column_blob(m_stmt, column);
+   const int session_blob_size = ::sqlite3_column_bytes(m_stmt, column);
+
+   BOTAN_ASSERT(session_blob_size >= 0, "Blob size is non-negative");
+
+   return std::make_pair(static_cast<const byte*>(session_blob),
+                         static_cast<size_t>(session_blob_size));
+   }
+
+size_t sqlite3_statement::get_size_t(int column)
+   {
+   BOTAN_ASSERT(::sqlite3_column_type(m_stmt, column) == SQLITE_INTEGER,
+                "Return count is an integer");
+
+   const int sessions_int = ::sqlite3_column_int(m_stmt, column);
+
+   BOTAN_ASSERT(sessions_int >= 0, "Expected size_t is non-negative");
+
+   return static_cast<size_t>(sessions_int);
+   }
+
+void sqlite3_statement::spin()
+   {
+   while(step()) {}
+   }
+
+bool sqlite3_statement::step()
+   {
+   return (::sqlite3_step(m_stmt) == SQLITE_ROW);
+   }
+
+sqlite3_statement::~sqlite3_statement()
+   {
+   ::sqlite3_finalize(m_stmt);
+   }
+
+}
diff --git a/src/utils/sqlite/sqlite.h b/src/utils/sqlite/sqlite.h
new file mode 100644
index 000000000..aef04ab4d
--- /dev/null
+++ b/src/utils/sqlite/sqlite.h
@@ -0,0 +1,68 @@
+/*
+* SQLite wrapper
+* (C) 2012 Jack Lloyd
+*
+* Released under the terms of the Botan license
+*/
+
+#ifndef BOTAN_UTILS_SQLITE_WRAPPER_H__
+#define BOTAN_UTILS_SQLITE_WRAPPER_H__
+
+#include <botan/types.h>
+#include <string>
+#include <chrono>
+#include <vector>
+
+class sqlite3;
+class sqlite3_stmt;
+
+namespace Botan {
+
+class sqlite3_database
+   {
+   public:
+      sqlite3_database(const std::string& file);
+
+      ~sqlite3_database();
+
+      size_t row_count(const std::string& table_name);
+
+      void create_table(const std::string& table_schema);
+   private:
+      friend class sqlite3_statement;
+
+      sqlite3* m_db;
+   };
+
+class sqlite3_statement
+   {
+   public:
+      sqlite3_statement(sqlite3_database* db,
+                        const std::string& base_sql);
+
+      void bind(int column, const std::string& val);
+
+      void bind(int column, int val);
+
+      void bind(int column, std::chrono::system_clock::time_point time);
+
+      void bind(int column, const std::vector<byte>& val);
+
+      std::pair<const byte*, size_t> get_blob(int column);
+
+      size_t get_size_t(int column);
+
+      void spin();
+
+      bool step();
+
+      sqlite3_stmt* stmt() { return m_stmt; }
+
+      ~sqlite3_statement();
+   private:
+      sqlite3_stmt* m_stmt;
+   };
+
+}
+
+#endif