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190 lines
8.8 KiB
190 lines
8.8 KiB
From: Gert Doering <gert@greenie.muc.de>
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Support for wolfSSL in OpenVPN
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This patch adds support for wolfSSL in OpenVPN. Support is added by using
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wolfSSL's OpenSSL compatibility layer. Function calls are left unchanged
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and instead the OpenSSL includes point to wolfSSL headers and OpenVPN is
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linked against the wolfSSL library. The wolfSSL installation directory is
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detected using pkg-config.
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As requested by OpenVPN maintainers, this patch does not include
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wolfssl/options.h on its own. By defining the macro EXTERNAL_OPTS_OPENVPN
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in the configure script wolfSSL will include wolfssl/options.h on its own
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(change added in wolfSSL/wolfssl#2825). The patch
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adds an option '--disable-wolfssl-options-h' in case the user would like
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to supply their own settings file for wolfSSL.
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wolfSSL:
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Support added in: wolfSSL/wolfssl#2503
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git clone https://github.com/wolfSSL/wolfssl.git
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cd wolfssl
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./autogen.sh
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./configure --enable-openvpn
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make
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sudo make install
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OpenVPN:
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autoreconf -i -v -f
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./configure --with-crypto-library=wolfssl
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make
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make check
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sudo make install
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Signed-off-by: Juliusz Sosinowicz <juliusz@wolfssl.com>
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Acked-by: Arne Schwabe <arne@rfc2549.org>
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Message-Id: <20210317181153.83716-1-juliusz@wolfssl.com>
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URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg21686.html
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Signed-off-by: Gert Doering <gert@greenie.muc.de>
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---
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configure.ac | 110 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
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src/openvpn/syshead.h | 3 ++-
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2 files changed, 110 insertions(+), 3 deletions(-)
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--- a/configure.ac
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+++ b/configure.ac
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@@ -271,16 +271,23 @@ AC_ARG_WITH(
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AC_ARG_WITH(
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[crypto-library],
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- [AS_HELP_STRING([--with-crypto-library=library], [build with the given crypto library, TYPE=openssl|mbedtls @<:@default=openssl@:>@])],
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+ [AS_HELP_STRING([--with-crypto-library=library], [build with the given crypto library, TYPE=openssl|mbedtls|wolfssl @<:@default=openssl@:>@])],
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[
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case "${withval}" in
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- openssl|mbedtls) ;;
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+ openssl|mbedtls|wolfssl) ;;
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*) AC_MSG_ERROR([bad value ${withval} for --with-crypto-library]) ;;
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esac
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],
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[with_crypto_library="openssl"]
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)
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+AC_ARG_ENABLE(
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+ [wolfssl-options-h],
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+ [AS_HELP_STRING([--disable-wolfssl-options-h], [Disable including options.h in wolfSSL @<:@default=yes@:>@])],
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+ ,
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+ [enable_wolfssl_options_h="yes"]
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+)
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+
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AC_ARG_WITH(
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[openssl-engine],
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[AS_HELP_STRING([--with-openssl-engine], [enable engine support with OpenSSL. Default enabled for OpenSSL < 3.0, auto,yes,no @<:@default=auto@:>@])],
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@@ -1054,6 +1061,105 @@ elif test "${with_crypto_library}" = "mb
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AC_DEFINE([ENABLE_CRYPTO_MBEDTLS], [1], [Use mbed TLS library])
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CRYPTO_CFLAGS="${MBEDTLS_CFLAGS}"
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CRYPTO_LIBS="${MBEDTLS_LIBS}"
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+
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+elif test "${with_crypto_library}" = "wolfssl"; then
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+ AC_ARG_VAR([WOLFSSL_CFLAGS], [C compiler flags for wolfssl. The include directory should
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+ contain the regular wolfSSL header files but also the
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+ wolfSSL OpenSSL header files. Ex: -I/usr/local/include
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+ -I/usr/local/include/wolfssl])
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+ AC_ARG_VAR([WOLFSSL_LIBS], [linker flags for wolfssl])
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+
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+ saved_CFLAGS="${CFLAGS}"
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+ saved_LIBS="${LIBS}"
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+
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+ if test -z "${WOLFSSL_CFLAGS}" -a -z "${WOLFSSL_LIBS}"; then
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+ # if the user did not explicitly specify flags, try to autodetect
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+ PKG_CHECK_MODULES(
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+ [WOLFSSL],
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+ [wolfssl],
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+ [],
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+ [AC_MSG_ERROR([Could not find wolfSSL.])]
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+ )
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+ PKG_CHECK_VAR(
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+ [WOLFSSL_INCLUDEDIR],
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+ [wolfssl],
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+ [includedir],
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+ [],
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+ [AC_MSG_ERROR([Could not find wolfSSL includedir variable.])]
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+ )
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+ WOLFSSL_CFLAGS="${WOLFSSL_CFLAGS} -I${WOLFSSL_INCLUDEDIR}/wolfssl"
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+ fi
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+ saved_CFLAGS="${CFLAGS}"
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+ saved_LIBS="${LIBS}"
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+ CFLAGS="${CFLAGS} ${WOLFSSL_CFLAGS}"
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+ LIBS="${LIBS} ${WOLFSSL_LIBS}"
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+
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+ AC_CHECK_LIB(
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+ [wolfssl],
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+ [wolfSSL_Init],
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+ [],
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+ [AC_MSG_ERROR([Could not link wolfSSL library.])]
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+ )
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+ AC_CHECK_HEADER([wolfssl/options.h],,[AC_MSG_ERROR([wolfSSL header wolfssl/options.h not found!])])
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+
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+ # wolfSSL signal EKM support
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+ have_export_keying_material="yes"
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+
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+ AC_DEFINE([HAVE_HMAC_CTX_NEW], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_HMAC_CTX_FREE], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_HMAC_CTX_RESET], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_EVP_MD_CTX_NEW], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_EVP_MD_CTX_FREE], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_EVP_MD_CTX_RESET], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_EVP_CIPHER_CTX_RESET], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_OPENSSL_VERSION], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_SSL_CTX_GET_DEFAULT_PASSWD_CB], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_SSL_CTX_GET_DEFAULT_PASSWD_CB_USERDATA], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_SSL_CTX_SET_SECURITY_LEVEL], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_X509_GET0_NOTBEFORE], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_X509_GET0_NOTAFTER], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_X509_GET0_PUBKEY], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_X509_STORE_GET0_OBJECTS], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_X509_OBJECT_FREE], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_X509_OBJECT_GET_TYPE], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_EVP_PKEY_ID], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_EVP_PKEY_GET0_RSA], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_EVP_PKEY_GET0_DSA], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_EVP_PKEY_GET0_EC_KEY], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_SET_FLAGS], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_BITS], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_GET0_KEY], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_SET0_KEY], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_DSA_GET0_PQG], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_DSA_BITS], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_NEW], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_FREE], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_SET_PUB_ENC], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_SET_PUB_DEC], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_SET_PRIV_ENC], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_SET_PRIV_DEC], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_SET_INIT], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_SET_SIGN], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_SET_FINISH], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_SET0_APP_DATA], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_RSA_METH_GET0_APP_DATA], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+ AC_DEFINE([HAVE_EC_GROUP_ORDER_BITS], [1], [Emulate AC_CHECK_FUNCS since these are defined as macros])
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+
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+ if test "${enable_wolfssl_options_h}" = "yes"; then
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+ AC_DEFINE([EXTERNAL_OPTS_OPENVPN], [1], [Include options.h from wolfSSL library])
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+ else
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+ AC_DEFINE([WOLFSSL_USER_SETTINGS], [1], [Use custom user_settings.h file for wolfSSL library])
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+ fi
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+
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+ have_export_keying_material="yes"
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+
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+ CFLAGS="${saved_CFLAGS}"
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+ LIBS="${saved_LIBS}"
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+
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+ AC_DEFINE([ENABLE_CRYPTO_WOLFSSL], [1], [Use wolfSSL crypto library])
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+ AC_DEFINE([ENABLE_CRYPTO_OPENSSL], [1], [Use wolfSSL openssl compatibility layer])
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+ CRYPTO_CFLAGS="${WOLFSSL_CFLAGS}"
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+ CRYPTO_LIBS="${WOLFSSL_LIBS}"
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else
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AC_MSG_ERROR([Invalid crypto library: ${with_crypto_library}])
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fi
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--- a/src/openvpn/syshead.h
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+++ b/src/openvpn/syshead.h
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@@ -582,7 +582,8 @@ socket_defined(const socket_descriptor_t
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/*
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* Do we have CryptoAPI capability?
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*/
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-#if defined(_WIN32) && defined(ENABLE_CRYPTO_OPENSSL)
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+#if defined(_WIN32) && defined(ENABLE_CRYPTO_OPENSSL) && \
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+ !defined(ENABLE_CRYPTO_WOLFSSL)
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#define ENABLE_CRYPTOAPI
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#endif
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