diff --git a/Makefile.in b/Makefile.in
index d83604a..1fedab8 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,7 +1,7 @@
 srcdir=@srcdir@
 
 CFLAGS=@CFLAGS@ @PURPLE_CFLAGS@ @DEFS@ -Wall -Wextra -Wno-deprecated-declarations -Wno-unused-parameter -I${srcdir} -I. -fno-strict-aliasing -fPIC
-LDFLAGS=@LDFLAGS@ @OPENSSL_LDFLAGS@ @PURPLE_LIBS@ @LIBS@ -lcrypto -rdynamic -ggdb
+LDFLAGS=@LDFLAGS@ @PURPLE_LIBS@ @LIBS@ -rdynamic -ggdb
 DIR_PERM=0755
 FILE_PERM=0644
 
@@ -47,7 +47,7 @@ tgl/Makefile.in:
 	@echo "tgl/Makefile.in not found. Maybe you need to 'git submodule update --init --recursive' ?" && exit 1
 
 tgl/Makefile: tgl/Makefile.in
-	cd tgl && ./configure -q
+	cd tgl && ./configure -q --disable-openssl
 
 tgl/libs/libtgl.a: tgl/Makefile
 	+make -C tgl
diff --git a/README.md b/README.md
index da88e96..d2f05f3 100644
--- a/README.md
+++ b/README.md
@@ -75,7 +75,7 @@ This repository has submodules, so you need to clone recursively.
 
 ###### Debian / Ubuntu
 
-        sudo apt-get install libssl-dev libglib2.0-dev libpurple-dev libwebp-dev
+        sudo apt-get install libgcrypt20-dev libssl-dev libpurple-dev libwebp-dev
 
 
 ###### OpenSUSE
@@ -216,8 +216,3 @@ Acknowledgements
 This software is based on the library [Libtgl](https://github.com/vysheng/tgl), which was written by Vitaly Valtman <mail@vysheng.ru> and others, see (http://github.com/vysheng/tgl)
 
 For PNG rendering, it includes the [lodepng library](http://lodev.org/lodepng/).
-
-This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit. (http://www.openssl.org/)
-
-This product includes cryptographic software written by Eric Young (eay@cryptsoft.com)
-
diff --git a/configure b/configure
index e920118..c13dfa4 100755
--- a/configure
+++ b/configure
@@ -626,13 +626,10 @@ PURPLE_LIBS
 PURPLE_CFLAGS
 PKG_CONFIG_LIBDIR
 PKG_CONFIG_PATH
+PKG_CONFIG
 EGREP
 GREP
 CPP
-OPENSSL_LDFLAGS
-OPENSSL_LIBS
-OPENSSL_INCLUDES
-PKG_CONFIG
 INSTALL_DATA
 INSTALL_SCRIPT
 INSTALL_PROGRAM
@@ -662,6 +659,7 @@ infodir
 docdir
 oldincludedir
 includedir
+runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -684,7 +682,6 @@ SHELL'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
-with_openssl
 with_zlib
 enable_libwebp
 '
@@ -740,6 +737,7 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
+runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@@ -992,6 +990,15 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
+  -runstatedir | --runstatedir | --runstatedi | --runstated \
+  | --runstate | --runstat | --runsta | --runst | --runs \
+  | --run | --ru | --r)
+    ac_prev=runstatedir ;;
+  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+  | --run=* | --ru=* | --r=*)
+    runstatedir=$ac_optarg ;;
+
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1129,7 +1136,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir
+		libdir localedir mandir runstatedir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1282,6 +1289,7 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -1317,7 +1325,6 @@ Optional Features:
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
-  --with-openssl=DIR      root of the OpenSSL directory
   --with-zlib=DIR         root directory path of zlib installation [defaults to
                           /usr/local or /usr if not found in /usr/local]
   --without-zlib          to disable zlib usage completely
@@ -2177,63 +2184,6 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 ac_config_headers="$ac_config_headers config.h"
 
 
-# ===========================================================================
-#     http://www.gnu.org/software/autoconf-archive/ax_check_openssl.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_CHECK_OPENSSL([action-if-found[, action-if-not-found]])
-#
-# DESCRIPTION
-#
-#   Look for OpenSSL in a number of default spots, or in a user-selected
-#   spot (via --with-openssl).  Sets
-#
-#     OPENSSL_INCLUDES to the include directives required
-#     OPENSSL_LIBS to the -l directives required
-#     OPENSSL_LDFLAGS to the -L or -R flags required
-#
-#   and calls ACTION-IF-FOUND or ACTION-IF-NOT-FOUND appropriately
-#
-#   This macro sets OPENSSL_INCLUDES such that source files should use the
-#   openssl/ directory in include directives:
-#
-#     #include <openssl/hmac.h>
-#
-# LICENSE
-#
-#   Copyright (c) 2009,2010 Zmanda Inc. <http://www.zmanda.com/>
-#   Copyright (c) 2009,2010 Dustin J. Mitchell <dustin@zmanda.com>
-#
-#   Copying and distribution of this file, with or without modification, are
-#   permitted in any medium without royalty provided the copyright notice
-#   and this notice are preserved. This file is offered as-is, without any
-#   warranty.
-
-#serial 8
-
-# This is what autoupdate's m4 run will expand.  It fires
-# the warning (with _au_warn_XXX), outputs it into the
-# updated configure.ac (with AC_DIAGNOSE), and then outputs
-# the replacement expansion.
-
-
-# This is an auxiliary macro that is also run when
-# autoupdate runs m4.  It simply calls m4_warning, but
-# we need a wrapper so that each warning is emitted only
-# once.  We break the quoting in m4_warning's argument in
-# order to expand this macro's arguments, not AU_DEFUN's.
-
-
-# Finally, this is the expansion that is picked up by
-# autoconf.  It tells the user to run autoupdate, and
-# then outputs the replacement expansion.  We do not care
-# about autoupdate's warning because that contains
-# information on what to do *after* running autoupdate.
-
-
-
 # ===========================================================================
 #       http://www.gnu.org/software/autoconf-archive/ax_check_zlib.html
 # ===========================================================================
@@ -2321,6 +2271,92 @@ ac_config_headers="$ac_config_headers config.h"
 
 
 
+# pkg.m4 - Macros to locate and utilise pkg-config.            -*- Autoconf -*-
+# serial 1 (pkg-config-0.24)
+#
+# Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# PKG_PROG_PKG_CONFIG([MIN-VERSION])
+# ----------------------------------
+# PKG_PROG_PKG_CONFIG
+
+# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+#
+# Check to see whether a particular set of modules exists.  Similar
+# to PKG_CHECK_MODULES(), but does not set variables or print errors.
+#
+# Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+# only at the first occurence in configure.ac, so if the first place
+# it's called might be skipped (such as if it is within an "if", you
+# have to call PKG_CHECK_EXISTS manually
+# --------------------------------------------------------------
+
+
+# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
+# ---------------------------------------------
+# _PKG_CONFIG
+
+# _PKG_SHORT_ERRORS_SUPPORTED
+# -----------------------------
+# _PKG_SHORT_ERRORS_SUPPORTED
+
+
+# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
+# [ACTION-IF-NOT-FOUND])
+#
+#
+# Note that if there is a possibility the first call to
+# PKG_CHECK_MODULES might not happen, you should be sure to include an
+# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
+#
+#
+# --------------------------------------------------------------
+# PKG_CHECK_MODULES
+
+
+# PKG_INSTALLDIR(DIRECTORY)
+# -------------------------
+# Substitutes the variable pkgconfigdir as the location where a module
+# should install pkg-config .pc files. By default the directory is
+# $libdir/pkgconfig, but the default can be changed by passing
+# DIRECTORY. The user can override through the --with-pkgconfigdir
+# parameter.
+
+
+# PKG_NOARCH_INSTALLDIR(DIRECTORY)
+# -------------------------
+# Substitutes the variable noarch_pkgconfigdir as the location where a
+# module should install arch-independent pkg-config .pc files. By
+# default the directory is $datadir/pkgconfig, but the default can be
+# changed by passing DIRECTORY. The user can override through the
+# --with-noarch-pkgconfigdir parameter.
+
+
+# PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
+# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------
+# Retrieves the value of the pkg-config variable for the given module.
+# PKG_CHECK_VAR
+
 
 # Checks for programs.
 ac_ext=c
@@ -3326,156 +3362,50 @@ _ACEOF
 
 fi
 
-
-    found=false
-
-# Check whether --with-openssl was given.
-if test "${with_openssl+set}" = set; then :
-  withval=$with_openssl;
-            case "$withval" in
-            "" | y | ye | yes | n | no)
-            as_fn_error $? "Invalid --with-openssl value" "$LINENO" 5
-              ;;
-            *) ssldirs="$withval"
-              ;;
-            esac
-
-else
-
-            # if pkg-config is installed and openssl has installed a .pc file,
-            # then use that information and don't search ssldirs
-            # Extract the first word of "pkg-config", so it can be a program name with args.
-set dummy pkg-config; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_PKG_CONFIG+:} false; then :
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for gcry_md_open in -lgcrypt" >&5
+$as_echo_n "checking for gcry_md_open in -lgcrypt... " >&6; }
+if ${ac_cv_lib_gcrypt_gcry_md_open+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  case $PKG_CONFIG in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_PKG_CONFIG="$PKG_CONFIG" # Let the user override the test with a path.
-  ;;
-  *)
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-  ;;
-esac
-fi
-PKG_CONFIG=$ac_cv_path_PKG_CONFIG
-if test -n "$PKG_CONFIG"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
-$as_echo "$PKG_CONFIG" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-            if test x"$PKG_CONFIG" != x""; then
-                OPENSSL_LDFLAGS=`$PKG_CONFIG openssl --libs-only-L 2>/dev/null`
-                if test $? = 0; then
-                    OPENSSL_LIBS=`$PKG_CONFIG openssl --libs-only-l 2>/dev/null`
-                    OPENSSL_INCLUDES=`$PKG_CONFIG openssl --cflags-only-I 2>/dev/null`
-                    found=true
-                fi
-            fi
-
-            # no such luck; use some default ssldirs
-            if ! $found; then
-                ssldirs="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr"
-            fi
-
-
-fi
-
-
-
-    # note that we #include <openssl/foo.h>, so the OpenSSL headers have to be in
-    # an 'openssl' subdirectory
-
-    if ! $found; then
-        OPENSSL_INCLUDES=
-        for ssldir in $ssldirs; do
-            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for openssl/ssl.h in $ssldir" >&5
-$as_echo_n "checking for openssl/ssl.h in $ssldir... " >&6; }
-            if test -f "$ssldir/include/openssl/ssl.h"; then
-                OPENSSL_INCLUDES="-I$ssldir/include"
-                OPENSSL_LDFLAGS="-L$ssldir/lib"
-                OPENSSL_LIBS="-lssl -lcrypto"
-                found=true
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-                break
-            else
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-            fi
-        done
-
-        # if the file wasn't found, well, go ahead and try the link anyway -- maybe
-        # it will just work!
-    fi
-
-    # try the preprocessor and linker with our new flags,
-    # being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS
-
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether compiling and linking against OpenSSL works" >&5
-$as_echo_n "checking whether compiling and linking against OpenSSL works... " >&6; }
-    echo "Trying link with OPENSSL_LDFLAGS=$OPENSSL_LDFLAGS;" \
-        "OPENSSL_LIBS=$OPENSSL_LIBS; OPENSSL_INCLUDES=$OPENSSL_INCLUDES" >&5
-
-    save_LIBS="$LIBS"
-    save_LDFLAGS="$LDFLAGS"
-    save_CPPFLAGS="$CPPFLAGS"
-    LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS"
-    LIBS="$OPENSSL_LIBS $LIBS"
-    CPPFLAGS="$OPENSSL_INCLUDES $CPPFLAGS"
-    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lgcrypt  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <openssl/ssl.h>
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char gcry_md_open ();
 int
 main ()
 {
-SSL_new(NULL)
+return gcry_md_open ();
   ;
   return 0;
 }
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
-
-            { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-
-
+  ac_cv_lib_gcrypt_gcry_md_open=yes
 else
-
-            { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-            as_fn_error $? "No openssl found" "$LINENO" 5
-
+  ac_cv_lib_gcrypt_gcry_md_open=no
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
-    CPPFLAGS="$save_CPPFLAGS"
-    LDFLAGS="$save_LDFLAGS"
-    LIBS="$save_LIBS"
-
-
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_gcrypt_gcry_md_open" >&5
+$as_echo "$ac_cv_lib_gcrypt_gcry_md_open" >&6; }
+if test "x$ac_cv_lib_gcrypt_gcry_md_open" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBGCRYPT 1
+_ACEOF
 
+  LIBS="-lgcrypt $LIBS"
 
+fi
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
diff --git a/configure.ac b/configure.ac
index 28b8e61..b90a3ae 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,8 +6,8 @@ AC_INIT([telegram-purple], [1.2.1])
 AC_CONFIG_SRCDIR([config.h.in])
 AC_CONFIG_HEADERS([config.h])
 
-m4_include([m4_ax_check_openssl.m4])
 m4_include([m4_ax_check_zlib.m4])
+m4_include([m4_ax_pkg_config.m4])
 
 # Checks for programs.
 AC_PROG_CC
@@ -15,10 +15,10 @@ AC_PROG_INSTALL
 
 AC_CHECK_LIB([m], [sqrt])
 AC_CHECK_LIB([rt], [clock_gettime])
-AX_CHECK_OPENSSL(,[AC_MSG_ERROR([No openssl found])])
+AC_CHECK_LIB([gcrypt], [gcry_md_open])
 AX_CHECK_ZLIB(, [AC_MSG_ERROR([No zlib found])])
 
-PKG_CHECK_MODULES([PURPLE], [purple], )
+PKG_CHECK_MODULES([PURPLE], [purple])
 
 AC_MSG_CHECKING([for libwebp])
 AC_ARG_ENABLE([libwebp],
diff --git a/m4_ax_check_openssl.m4 b/m4_ax_check_openssl.m4
deleted file mode 100644
index a87c5a6..0000000
--- a/m4_ax_check_openssl.m4
+++ /dev/null
@@ -1,124 +0,0 @@
-# ===========================================================================
-#     http://www.gnu.org/software/autoconf-archive/ax_check_openssl.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_CHECK_OPENSSL([action-if-found[, action-if-not-found]])
-#
-# DESCRIPTION
-#
-#   Look for OpenSSL in a number of default spots, or in a user-selected
-#   spot (via --with-openssl).  Sets
-#
-#     OPENSSL_INCLUDES to the include directives required
-#     OPENSSL_LIBS to the -l directives required
-#     OPENSSL_LDFLAGS to the -L or -R flags required
-#
-#   and calls ACTION-IF-FOUND or ACTION-IF-NOT-FOUND appropriately
-#
-#   This macro sets OPENSSL_INCLUDES such that source files should use the
-#   openssl/ directory in include directives:
-#
-#     #include <openssl/hmac.h>
-#
-# LICENSE
-#
-#   Copyright (c) 2009,2010 Zmanda Inc. <http://www.zmanda.com/>
-#   Copyright (c) 2009,2010 Dustin J. Mitchell <dustin@zmanda.com>
-#
-#   Copying and distribution of this file, with or without modification, are
-#   permitted in any medium without royalty provided the copyright notice
-#   and this notice are preserved. This file is offered as-is, without any
-#   warranty.
-
-#serial 8
-
-AU_ALIAS([CHECK_SSL], [AX_CHECK_OPENSSL])
-AC_DEFUN([AX_CHECK_OPENSSL], [
-    found=false
-    AC_ARG_WITH([openssl],
-        [AS_HELP_STRING([--with-openssl=DIR],
-            [root of the OpenSSL directory])],
-        [
-            case "$withval" in
-            "" | y | ye | yes | n | no)
-            AC_MSG_ERROR([Invalid --with-openssl value])
-              ;;
-            *) ssldirs="$withval"
-              ;;
-            esac
-        ], [
-            # if pkg-config is installed and openssl has installed a .pc file,
-            # then use that information and don't search ssldirs
-            AC_PATH_PROG([PKG_CONFIG], [pkg-config])
-            if test x"$PKG_CONFIG" != x""; then
-                OPENSSL_LDFLAGS=`$PKG_CONFIG openssl --libs-only-L 2>/dev/null`
-                if test $? = 0; then
-                    OPENSSL_LIBS=`$PKG_CONFIG openssl --libs-only-l 2>/dev/null`
-                    OPENSSL_INCLUDES=`$PKG_CONFIG openssl --cflags-only-I 2>/dev/null`
-                    found=true
-                fi
-            fi
-
-            # no such luck; use some default ssldirs
-            if ! $found; then
-                ssldirs="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr"
-            fi
-        ]
-        )
-
-
-    # note that we #include <openssl/foo.h>, so the OpenSSL headers have to be in
-    # an 'openssl' subdirectory
-
-    if ! $found; then
-        OPENSSL_INCLUDES=
-        for ssldir in $ssldirs; do
-            AC_MSG_CHECKING([for openssl/ssl.h in $ssldir])
-            if test -f "$ssldir/include/openssl/ssl.h"; then
-                OPENSSL_INCLUDES="-I$ssldir/include"
-                OPENSSL_LDFLAGS="-L$ssldir/lib"
-                OPENSSL_LIBS="-lssl -lcrypto"
-                found=true
-                AC_MSG_RESULT([yes])
-                break
-            else
-                AC_MSG_RESULT([no])
-            fi
-        done
-
-        # if the file wasn't found, well, go ahead and try the link anyway -- maybe
-        # it will just work!
-    fi
-
-    # try the preprocessor and linker with our new flags,
-    # being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS
-
-    AC_MSG_CHECKING([whether compiling and linking against OpenSSL works])
-    echo "Trying link with OPENSSL_LDFLAGS=$OPENSSL_LDFLAGS;" \
-        "OPENSSL_LIBS=$OPENSSL_LIBS; OPENSSL_INCLUDES=$OPENSSL_INCLUDES" >&AS_MESSAGE_LOG_FD
-
-    save_LIBS="$LIBS"
-    save_LDFLAGS="$LDFLAGS"
-    save_CPPFLAGS="$CPPFLAGS"
-    LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS"
-    LIBS="$OPENSSL_LIBS $LIBS"
-    CPPFLAGS="$OPENSSL_INCLUDES $CPPFLAGS"
-    AC_LINK_IFELSE(
-        [AC_LANG_PROGRAM([#include <openssl/ssl.h>], [SSL_new(NULL)])],
-        [
-            AC_MSG_RESULT([yes])
-            $1
-        ], [
-            AC_MSG_RESULT([no])
-            $2
-        ])
-    CPPFLAGS="$save_CPPFLAGS"
-    LDFLAGS="$save_LDFLAGS"
-    LIBS="$save_LIBS"
-
-    AC_SUBST([OPENSSL_INCLUDES])
-    AC_SUBST([OPENSSL_LIBS])
-    AC_SUBST([OPENSSL_LDFLAGS])
-])
diff --git a/m4_ax_pkg_config.m4 b/m4_ax_pkg_config.m4
new file mode 100644
index 0000000..c5b26b5
--- /dev/null
+++ b/m4_ax_pkg_config.m4
@@ -0,0 +1,214 @@
+# pkg.m4 - Macros to locate and utilise pkg-config.            -*- Autoconf -*-
+# serial 1 (pkg-config-0.24)
+# 
+# Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# PKG_PROG_PKG_CONFIG([MIN-VERSION])
+# ----------------------------------
+AC_DEFUN([PKG_PROG_PKG_CONFIG],
+[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
+m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
+m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
+AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
+AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
+AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
+
+if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
+	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
+fi
+if test -n "$PKG_CONFIG"; then
+	_pkg_min_version=m4_default([$1], [0.9.0])
+	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
+	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
+		AC_MSG_RESULT([yes])
+	else
+		AC_MSG_RESULT([no])
+		PKG_CONFIG=""
+	fi
+fi[]dnl
+])# PKG_PROG_PKG_CONFIG
+
+# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+#
+# Check to see whether a particular set of modules exists.  Similar
+# to PKG_CHECK_MODULES(), but does not set variables or print errors.
+#
+# Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+# only at the first occurence in configure.ac, so if the first place
+# it's called might be skipped (such as if it is within an "if", you
+# have to call PKG_CHECK_EXISTS manually
+# --------------------------------------------------------------
+AC_DEFUN([PKG_CHECK_EXISTS],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+if test -n "$PKG_CONFIG" && \
+    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
+  m4_default([$2], [:])
+m4_ifvaln([$3], [else
+  $3])dnl
+fi])
+
+# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
+# ---------------------------------------------
+m4_define([_PKG_CONFIG],
+[if test -n "$$1"; then
+    pkg_cv_[]$1="$$1"
+ elif test -n "$PKG_CONFIG"; then
+    PKG_CHECK_EXISTS([$3],
+                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes ],
+		     [pkg_failed=yes])
+ else
+    pkg_failed=untried
+fi[]dnl
+])# _PKG_CONFIG
+
+# _PKG_SHORT_ERRORS_SUPPORTED
+# -----------------------------
+AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+        _pkg_short_errors_supported=yes
+else
+        _pkg_short_errors_supported=no
+fi[]dnl
+])# _PKG_SHORT_ERRORS_SUPPORTED
+
+
+# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
+# [ACTION-IF-NOT-FOUND])
+#
+#
+# Note that if there is a possibility the first call to
+# PKG_CHECK_MODULES might not happen, you should be sure to include an
+# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
+#
+#
+# --------------------------------------------------------------
+AC_DEFUN([PKG_CHECK_MODULES],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
+AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
+
+pkg_failed=no
+AC_MSG_CHECKING([for $1])
+
+_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
+_PKG_CONFIG([$1][_LIBS], [libs], [$2])
+
+m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
+and $1[]_LIBS to avoid the need to call pkg-config.
+See the pkg-config man page for more details.])
+
+if test $pkg_failed = yes; then
+   	AC_MSG_RESULT([no])
+        _PKG_SHORT_ERRORS_SUPPORTED
+        if test $_pkg_short_errors_supported = yes; then
+	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
+        else 
+	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
+        fi
+	# Put the nasty error message in config.log where it belongs
+	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
+
+	m4_default([$4], [AC_MSG_ERROR(
+[Package requirements ($2) were not met:
+
+$$1_PKG_ERRORS
+
+Consider adjusting the PKG_CONFIG_PATH environment variable if you
+installed software in a non-standard prefix.
+
+_PKG_TEXT])[]dnl
+        ])
+elif test $pkg_failed = untried; then
+     	AC_MSG_RESULT([no])
+	m4_default([$4], [AC_MSG_FAILURE(
+[The pkg-config script could not be found or is too old.  Make sure it
+is in your PATH or set the PKG_CONFIG environment variable to the full
+path to pkg-config.
+
+_PKG_TEXT
+
+To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
+        ])
+else
+	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
+	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
+        AC_MSG_RESULT([yes])
+	$3
+fi[]dnl
+])# PKG_CHECK_MODULES
+
+
+# PKG_INSTALLDIR(DIRECTORY)
+# -------------------------
+# Substitutes the variable pkgconfigdir as the location where a module
+# should install pkg-config .pc files. By default the directory is
+# $libdir/pkgconfig, but the default can be changed by passing
+# DIRECTORY. The user can override through the --with-pkgconfigdir
+# parameter.
+AC_DEFUN([PKG_INSTALLDIR],
+[m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])
+m4_pushdef([pkg_description],
+    [pkg-config installation directory @<:@]pkg_default[@:>@])
+AC_ARG_WITH([pkgconfigdir],
+    [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,
+    [with_pkgconfigdir=]pkg_default)
+AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])
+m4_popdef([pkg_default])
+m4_popdef([pkg_description])
+]) dnl PKG_INSTALLDIR
+
+
+# PKG_NOARCH_INSTALLDIR(DIRECTORY)
+# -------------------------
+# Substitutes the variable noarch_pkgconfigdir as the location where a
+# module should install arch-independent pkg-config .pc files. By
+# default the directory is $datadir/pkgconfig, but the default can be
+# changed by passing DIRECTORY. The user can override through the
+# --with-noarch-pkgconfigdir parameter.
+AC_DEFUN([PKG_NOARCH_INSTALLDIR],
+[m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])
+m4_pushdef([pkg_description],
+    [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])
+AC_ARG_WITH([noarch-pkgconfigdir],
+    [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,
+    [with_noarch_pkgconfigdir=]pkg_default)
+AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])
+m4_popdef([pkg_default])
+m4_popdef([pkg_description])
+]) dnl PKG_NOARCH_INSTALLDIR
+
+
+# PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
+# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------
+# Retrieves the value of the pkg-config variable for the given module.
+AC_DEFUN([PKG_CHECK_VAR],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
+
+_PKG_CONFIG([$1], [variable="][$3]["], [$2])
+AS_VAR_COPY([$1], [pkg_cv_][$1])
+
+AS_VAR_IF([$1], [""], [$5], [$4])dnl
+])# PKG_CHECK_VAR
diff --git a/telegram-base.c b/telegram-base.c
index 02836bf..02990ce 100644
--- a/telegram-base.c
+++ b/telegram-base.c
@@ -34,7 +34,7 @@
 
 #include <glib.h>
 #include <request.h>
-#include <openssl/sha.h>
+#include <gcrypt.h>
 
 #include "telegram-base.h"
 #include "telegram-purple.h"
@@ -338,7 +338,7 @@ void read_secret_chat (struct tgl_state *TLS, int fd, int v) {
   if (v >= 2) {
     assert (read (fd, sha, 20) == 20);
   } else {
-    SHA1 ((void *)key, 256, sha);
+    gcry_md_hash_buffer (GCRY_MD_SHA1, sha, (void *)key, 256);
   }
   int in_seq_no = 0, out_seq_no = 0, last_in_seq_no = 0;
   if (v >= 1) {
diff --git a/tgp-net.c b/tgp-net.c
index f9c275f..b0cab15 100644
--- a/tgp-net.c
+++ b/tgp-net.c
@@ -32,7 +32,6 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <poll.h>
-#include <openssl/rand.h>
 #include <arpa/inet.h>
 #include <sys/time.h>
 #include <time.h>