diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index eb9a2e66..0fd2e562 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -32,7 +32,7 @@ jobs:
       run: |
         sudo apt update
         sudo apt install -y libykclient-dev libykpers-1-dev libyubikey-dev \
-          libpam-dev help2man asciidoc-base
+          libpam-dev help2man asciidoc-base libmysqlclient-dev
         autoreconf --install
         ./configure
         make
diff --git a/.github/workflows/scan.yml b/.github/workflows/scan.yml
index bcc4b101..621e24c0 100644
--- a/.github/workflows/scan.yml
+++ b/.github/workflows/scan.yml
@@ -8,7 +8,7 @@ on:
 env:
   SCAN_IMG:
     yubico-yes-docker-local.jfrog.io/static-code-analysis/c:v1
-  COMPILE_DEPS: "libykclient-dev libykpers-1-dev libyubikey-dev"
+  COMPILE_DEPS: "libykclient-dev libykpers-1-dev libyubikey-dev libmysqlclient-dev"
 
 jobs:
   build:
diff --git a/.travis.yml b/.travis.yml
index 9b5e3b4f..71cc606d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,3 @@
-sudo: required
 language: c
 os:
   - linux
@@ -7,13 +6,14 @@ compiler:
   - gcc
   - clang
 env:
-  - CONFIGURE_ARGS="" EXTRA="libldap2-dev libykpers-1-dev libnet-ldap-server-perl"
-  - CONFIGURE_ARGS="--without-ldap" EXTRA="libykpers-1-dev"
-  - CONFIGURE_ARGS="--without-cr" EXTRA="libldap2-dev libnet-ldap-server-perl"
-  - CONFIGURE_ARGS="--without-ldap --without-cr"
+  - CONFIGURE_ARGS="" EXTRA="libldap2-dev libykpers-1-dev libnet-ldap-server-perl libmysqlclient-dev"
+  - CONFIGURE_ARGS="--without-ldap" EXTRA="libykpers-1-dev libmysqlclient-dev"
+  - CONFIGURE_ARGS="--without-cr" EXTRA="libldap2-dev libnet-ldap-server-perl libmysqlclient-dev"
+  - CONFIGURE_ARGS="--without-ldap --without-cr" EXTRA="libmysqlclient-dev"
 script: tests/aux/build-and-test.sh
-matrix:
+jobs:
+  install: travis_wait 30 mvn install
   include:
     - compiler: gcc
       os: linux
-      env: COVERAGE="--enable-coverage" EXTRA="libldap2-dev libykpers-1-dev libnet-ldap-server-perl lcov"
+      env: COVERAGE="--enable-coverage" EXTRA="libldap2-dev libykpers-1-dev libnet-ldap-server-perl lcov libmysqlclient-dev"
diff --git a/Makefile.am b/Makefile.am
index 2708acef..78ffa8f4 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -45,7 +45,12 @@ pam_yubico_la_LDFLAGS = -module -avoid-version
 
 noinst_LTLIBRARIES = libpam_util.la libpam_real.la
 libpam_util_la_SOURCES = util.c util.h
-libpam_util_la_LIBADD = @LTLIBYUBIKEY@ @YKPERS_LIBS@
+libpam_util_la_LIBADD = @LTLIBYUBIKEY@ @YKPERS_LIBS@ 
+
+# if MYSQL_SUPPORT
+AM_CFLAGS += @MYSQL_CFLAGS@
+libpam_util_la_LIBADD += @MYSQL_LIBS@
+# endif
 
 libpam_real_la_SOURCES = pam_yubico.c
 
diff --git a/configure.ac b/configure.ac
index 38471df5..f9da7e33 100644
--- a/configure.ac
+++ b/configure.ac
@@ -75,6 +75,19 @@ AC_ARG_WITH([ldap],
                  [libldap not found, will not be compiled (--without-ldap to disable ldap support)])],
               [])])
 
+AC_ARG_WITH([mysql],
+            [AS_HELP_STRING([--without-mysql],
+              [disable support for mysql])],
+            [],
+            [with_mysql=yes])
+AS_IF([test "x$with_mysql" != xno],
+  [
+    PKG_CHECK_MODULES([MYSQL], [mysqlclient],
+    [AC_DEFINE([HAVE_MYSQL], [1],[Define if you have mysqlclient])],
+    [AC_MSG_WARN(
+                 [libmysqlclient not found, will not be compiled (--without-mysql to disable mysql support)])])
+  ])
+AM_CONDITIONAL(MYSQL_SUPPORT,test "x$with_mysql" != xno)
 
 AC_LIB_HAVE_LINKFLAGS([ykclient],, [#include <ykclient.h>],
                       [ykclient_set_proxy(0, 0)])
diff --git a/pam_yubico.8.txt b/pam_yubico.8.txt
index 9bc9abca..45bd6b73 100644
--- a/pam_yubico.8.txt
+++ b/pam_yubico.8.txt
@@ -116,6 +116,18 @@ CA certitificate file for the LDAP connection.
 *chalresp_path*=_path_::
 Path of a system-wide directory where challenge-response files can be found for users. Default location is `$HOME/.yubico/`.
 
+*mysql_server*=_mysqlserver_::
+Hostname/Adress of mysql server. Example 10.0.0.1
+
+*mysql_user*=_mysqluser_::
+User for accessing to the database. Strongly recommended to use a specific user with read only access.
+
+*mysql_password*=_mysqlpassword_::
+Mysql password associated to the user.
+
+*mysql_database*=_mysqldatabase_::
+the name of the database. Example : otp
+
 == EXAMPLES
 
   auth sufficient pam_yubico.so id=16 debug
diff --git a/pam_yubico.c b/pam_yubico.c
index cf277953..899dc5b3 100644
--- a/pam_yubico.c
+++ b/pam_yubico.c
@@ -134,6 +134,11 @@ struct cfg
   const char *user_attr;
   const char *yubi_attr;
   const char *yubi_attr_prefix;
+  const char *mysql_server;
+  const char *mysql_user;
+  const char *mysql_password;
+  const char *mysql_database;
+
   unsigned int token_id_length;
   enum key_mode mode;
   const char *chalresp_path;
@@ -164,8 +169,19 @@ authorize_user_token (struct cfg *cfg,
 		      pam_handle_t *pamh)
 {
   int retval = AUTH_ERROR;
-
-  if (cfg->auth_file)
+  if (cfg->mysql_server)
+    {
+#ifdef HAVE_MYSQL
+      /* Administrator had configured the database and specified is name
+        as an argument for this module.
+      */
+      DBG ("Using Mariadb or Mysql Database");
+      retval = check_user_token_mysql(cfg->mysql_server, cfg->mysql_user, cfg->mysql_password, cfg->mysql_database, username, otp_id, cfg->debug, cfg->debug_file);
+#else
+      DBG (("Trying to use MYSQL, but this function is not compiled in pam_yubico!!"));
+#endif
+    }
+  else if (cfg->auth_file)
     {
       /* Administrator had configured the file and specified is name
          as an argument for this module.
@@ -874,6 +890,15 @@ parse_cfg (int flags, int argc, const char **argv, struct cfg *cfg)
 	cfg->mode = CLIENT;
       if (strncmp (argv[i], "chalresp_path=", 14) == 0)
 	cfg->chalresp_path = argv[i] + 14;
+      if (strncmp (argv[i], "mysql_server=", 13) == 0)
+	cfg->mysql_server = argv[i] + 13;
+       if (strncmp (argv[i], "mysql_user=", 11) == 0)
+	cfg->mysql_user = argv[i] + 11;
+       if (strncmp (argv[i], "mysql_password=", 15) == 0)
+	cfg->mysql_password = argv[i] + 15;
+      if (strncmp (argv[i], "mysql_database=", 15) == 0)
+	cfg->mysql_database = argv[i] + 15;
+
       if (strncmp (argv[i], "debug_file=", 11) == 0)
         {
           const char *filename = argv[i] + 11;
@@ -939,6 +964,9 @@ parse_cfg (int flags, int argc, const char **argv, struct cfg *cfg)
   DBG ("token_id_length=%u", cfg->token_id_length);
   DBG ("mode=%s", cfg->mode == CLIENT ? "client" : "chresp" );
   DBG ("chalresp_path=%s", cfg->chalresp_path ? cfg->chalresp_path : "(null)");
+  DBG ("mysql_server=%s", cfg->mysql_server ? cfg->mysql_server : "(null)");
+  DBG ("mysql_user=%s", cfg->mysql_user ? cfg->mysql_user : "(null)");
+  DBG ("mysql_database=%s", cfg->mysql_database ? cfg->mysql_database : "(null)");
 
   if (fd != -1)
     close(fd);
diff --git a/tests/aux/build-and-test.sh b/tests/aux/build-and-test.sh
index b239d32c..3db2cbc2 100755
--- a/tests/aux/build-and-test.sh
+++ b/tests/aux/build-and-test.sh
@@ -7,7 +7,7 @@ autoreconf -i
 if [ "x$TRAVIS_OS_NAME" != "xosx" ]; then
     sudo add-apt-repository -y ppa:yubico/stable
     sudo apt-get update -qq || true
-    sudo apt-get install -qq -y --no-install-recommends libykclient-dev libpam0g-dev libyubikey-dev asciidoc docbook-xsl xsltproc libxml2-utils $EXTRA
+    sudo apt-get install -qq -y --no-install-recommends libykclient-dev libpam0g-dev libyubikey-dev asciidoc docbook-xsl xsltproc libxml2-utils libmysqlclient-dev $EXTRA
 else
     brew update
     brew install pkg-config
@@ -17,6 +17,7 @@ else
     brew install libyubikey
     brew install ykclient
     brew install ykpers
+    brew install mysql-connector-c #Mysql
     cpanp install Net::LDAP::Server
 
     # this is required so asciidoc can find the xml catalog
diff --git a/util.c b/util.c
index 1b18196a..c1d91e39 100644
--- a/util.c
+++ b/util.c
@@ -52,6 +52,10 @@
 #include <ykdef.h>
 #endif /* HAVE_CR */
 
+#ifdef HAVE_MYSQL
+#include <mysql.h>
+#endif
+
 int
 get_user_cfgfile_path(const char *common_path, const char *filename, const struct passwd *user, char **fn)
 {
@@ -93,6 +97,195 @@ get_user_cfgfile_path(const char *common_path, const char *filename, const struc
   return 1;
 }
 
+#ifdef HAVE_MYSQL
+/*
+ * This function will look for users name with valid user token id, in a database Mysql
+ *
+ * Returns one of AUTH_FOUND, AUTH_NOT_FOUND, AUTH_NO_TOKENS, AUTH_ERROR.
+ *
+ * Need database with this table structure:
+ *
+ * CREATE TABLE IF NOT EXISTS  `otp`.`yubikey_mappings`(
+ *   `otp_id` VARCHAR(12) NOT NULL ,
+ *   `username` VARCHAR(64) NOT NULL ,
+ *   PRIMARY KEY  (`otp_id`(12))
+ *  );
+ *
+ */
+int
+check_user_token_mysql(const char *mysql_server,
+      const char *mysql_user,
+      const char *mysql_password,
+      const char *mysql_database,
+      const char *username,
+      const char *otp_id,
+      int verbose,
+      FILE *debug_file)
+{
+
+  int retval = AUTH_ERROR;
+  int fd;
+  struct stat st;
+  FILE *opwfile;
+  MYSQL *con = NULL;
+  MYSQL_STMT *stmt;
+  MYSQL_BIND ps_params[2];
+  MYSQL_BIND bind[1];
+  long unsigned int str_username;
+  long unsigned int str_otp;
+  long unsigned int length;
+  int int_data;
+  int row_count;
+  bool is_null;
+  bool error;
+
+  if(mysql_library_init(0, NULL, NULL)){
+    if(verbose){
+      D (debug_file, "could not initialize MySQL client library");
+    }
+
+    return retval;
+  }
+
+  con = mysql_init(con);
+  if(!con) {
+    if(verbose)
+	  D (debug_file, "out of memorys");
+    return retval;
+  }
+
+  if(mysql_real_connect(con, mysql_server,mysql_user,mysql_password,mysql_database, 0, NULL, 0) == NULL)
+  {
+    if(verbose)
+	  D (debug_file, "Connection failed ...");
+    return retval;
+  }
+
+  stmt = mysql_stmt_init(con);
+  if(!stmt)
+  {
+    if(verbose)
+    D (debug_file, "Connection failed ... 2");
+    return retval;
+  }
+
+  const char *sql = "SELECT count(username) FROM yubikey_mappings WHERE username = ?;";
+  const char *sql2 = "SELECT count(username) FROM yubikey_mappings WHERE username = ? and otp_id = ?;";
+
+  if(otp_id == NULL)
+  {
+    if(mysql_stmt_prepare(stmt, sql, strlen(sql)))
+    {
+      if(verbose)
+	    D (debug_file, "mysql_stmt_prepare() failed %s", mysql_stmt_error(stmt));
+      return retval;
+    }
+  }else{
+    if(mysql_stmt_prepare(stmt, sql2, strlen(sql2)))
+    {
+      if(verbose)
+	    D (debug_file, "mysql_stmt_prepare() failed %s", mysql_stmt_error(stmt));
+      return retval;
+    }
+  }
+
+  str_username = strlen(username);
+  memset(ps_params, 0, sizeof(ps_params));
+  ps_params[0].buffer_type = MYSQL_TYPE_STRING;
+  ps_params[0].buffer = (char *)username;
+  ps_params[0].buffer_length = str_username;
+  ps_params[0].length = &str_username;
+  ps_params[0].is_null = 0;
+
+  if(otp_id != NULL)
+  {
+    str_otp= strlen(otp_id);
+    ps_params[1].buffer_type = MYSQL_TYPE_STRING;
+    ps_params[1].buffer = (char *)otp_id;
+    ps_params[1].buffer_length = str_otp;
+    ps_params[1].length = &str_otp;
+    ps_params[1].is_null = 0;
+  }
+
+  if(mysql_stmt_bind_param(stmt, ps_params))
+  {
+    if(verbose)
+    D (debug_file, "mysql_stmt_bind_param() failed %s", mysql_stmt_error(stmt));
+    return retval;
+  }
+
+  if(mysql_stmt_execute(stmt))
+  {
+    if(verbose)
+    D (debug_file, "mysql_stmt_execute() failed %s", mysql_stmt_error(stmt));
+    return retval;
+  }
+
+  memset(bind, 0, sizeof(bind));
+  bind[0].buffer_type = MYSQL_TYPE_LONG;
+  bind[0].buffer = (char *)&int_data;
+  bind[0].length = &length;
+  bind[0].is_null = &is_null;
+  bind[0].error = &error;
+
+  if(mysql_stmt_bind_result(stmt, bind))
+  {
+    if(verbose)
+    D (debug_file, "mysql_stmt_bind_result() failed %s", mysql_stmt_error(stmt));
+  }
+
+  if(mysql_stmt_store_result(stmt))
+  {
+    if(verbose)
+    D (debug_file, "mysql_stmt_store_result() failed %s", mysql_stmt_error(stmt));
+    return retval;
+  }
+
+  while(!mysql_stmt_fetch(stmt))
+  {
+    if(is_null)
+    {
+      D (debug_file, "mysql_stmt_fetch() failed");
+    }
+    else
+    {
+      if(otp_id != NULL){
+        if(int_data)
+        {
+          return AUTH_FOUND;
+        }
+        else
+        {
+          return AUTH_NOT_FOUND;
+        }
+      }
+      else if(otp_id == NULL)
+      {
+        if(int_data)
+        {
+          return AUTH_NOT_FOUND;
+        }
+        else
+        {
+          return AUTH_NO_TOKENS;
+        }
+      }
+    }
+  }
+
+  if(mysql_stmt_close(stmt))
+  {
+    if(verbose)
+    D (debug_file, "mysql_stmt_close() failed %s", mysql_stmt_error(stmt));
+    return retval;
+  }
+
+  mysql_close(con);
+  mysql_library_end();
+
+  return retval;
+}
+#endif
 
 /*
  * This function will look for users name with valid user token id.
diff --git a/util.h b/util.h
index 996b0c4c..fbf5397b 100644
--- a/util.h
+++ b/util.h
@@ -51,6 +51,9 @@
 #define AUTH_NOT_FOUND -1 /* The requested token is not associated to the user */
 
 int get_user_cfgfile_path(const char *common_path, const char *filename, const struct passwd *user, char **fn);
+#ifdef HAVE_MYSQL
+int check_user_token_mysql(const char *mysql_server,const char *mysql_user,const char *mysql_password,const char *mysql_database,const char *username,const char *otp_id,int verbose,FILE *debug_file);
+#endif
 int check_user_token(const char *authfile, const char *username, const char *otp_id, int verbose, FILE *debug_file);
 
 #if HAVE_CR