[Openvpn-devel,1/7] Remove option to disable crypto engine

Message ID 20171202134541.7688-1-a@unstable.cc
State Superseded
Headers show
Series
  • [Openvpn-devel,1/7] Remove option to disable crypto engine
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Commit Message

Antonio Quartulli Dec. 2, 2017, 1:45 p.m.
With this patch we remove the possibility to disable the crypto engine
(ENABLE_CRYPTO define) at configuration time.

[Some unit-test are temporarily disabled and will be enabled again when
ENABLE_CRYPTO is completely removed from the codebase]

[--disable-crypto has been removed from .travis.yml too]

Signed-off-by: Antonio Quartulli <a@unstable.cc>
---
 .travis.yml                                        |  2 +-
 config-msvc.h                                      |  1 -
 configure.ac                                       | 33 ++++++----------------
 doc/doxygen/openvpn.doxyfile.in                    |  2 +-
 .../keyingmaterialexporter.c                       |  2 --
 sample/sample-plugins/log/log_v3.c                 |  2 --
 tests/Makefile.am                                  |  4 +--
 tests/unit_tests/openvpn/Makefile.am               |  4 +--
 8 files changed, 13 insertions(+), 37 deletions(-)

Comments

Steffan Karger Dec. 3, 2017, 9:39 a.m. | #1
Hi,

Feature-ACK.

As discussed on IRC, let's apply this patch after 2/7 (or merge with
2/7) to prevent having a commit in the tree that unconditionally
disabled crypto.

On 02-12-17 14:45, Antonio Quartulli wrote:
> With this patch we remove the possibility to disable the crypto engine
> (ENABLE_CRYPTO define) at configuration time.
> 
> [Some unit-test are temporarily disabled and will be enabled again when
> ENABLE_CRYPTO is completely removed from the codebase]
> 
> [--disable-crypto has been removed from .travis.yml too]
> 
> Signed-off-by: Antonio Quartulli <a@unstable.cc>
> ---
>  .travis.yml                                        |  2 +-
>  config-msvc.h                                      |  1 -
>  configure.ac                                       | 33 ++++++----------------
>  doc/doxygen/openvpn.doxyfile.in                    |  2 +-
>  .../keyingmaterialexporter.c                       |  2 --
>  sample/sample-plugins/log/log_v3.c                 |  2 --
>  tests/Makefile.am                                  |  4 +--
>  tests/unit_tests/openvpn/Makefile.am               |  4 +--
>  8 files changed, 13 insertions(+), 37 deletions(-)
> 
> diff --git a/.travis.yml b/.travis.yml
> index 366e6599..e89cb7d4 100644
> --- a/.travis.yml
> +++ b/.travis.yml
> @@ -59,7 +59,7 @@ matrix:
>      - env: SSLLIB="openssl" CHOST=i686-w64-mingw32
>        os: linux
>        compiler: ": Win32 build only"
> -    - env: SSLLIB="openssl" EXTRA_CONFIG="--disable-crypto" EXTRA_SCRIPT="make distcheck"
> +    - env: SSLLIB="openssl" EXTRA_SCRIPT="make distcheck"
>        os: linux
>        compiler: clang
>      - env: SSLLIB="openssl" EXTRA_CONFIG="--disable-lzo"
> diff --git a/config-msvc.h b/config-msvc.h
> index 0bb153df..8be9195f 100644
> --- a/config-msvc.h
> +++ b/config-msvc.h
> @@ -4,7 +4,6 @@
>  
>  #define ENABLE_DEF_AUTH 1
>  #define ENABLE_PF 1
> -#define ENABLE_CRYPTO 1
>  #define ENABLE_CRYPTO_OPENSSL 1
>  #define ENABLE_DEBUG 1
>  #define ENABLE_EUREPHIA 1
> diff --git a/configure.ac b/configure.ac
> index acfddb22..faea7d15 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -77,13 +77,6 @@ AC_ARG_ENABLE(comp-stub,
>  	[enable_comp_stub="no"]
>  )
>  
> -AC_ARG_ENABLE(
> -	[crypto],
> -	[AS_HELP_STRING([--disable-crypto], [disable crypto support @<:@default=yes@:>@])],
> -	,
> -	[enable_crypto="yes"]
> -)
> -
>  AC_ARG_ENABLE(
>  	[ofb-cfb],
>  	[AS_HELP_STRING([--disable-ofb-cfb], [disable support for OFB and CFB cipher modes @<:@default=yes@:>@])],
> @@ -843,7 +836,7 @@ PKG_CHECK_MODULES(
>  	[]
>  )
>  
> -if test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "openssl"; then
> +if test "${with_crypto_library}" = "openssl"; then
>  	AC_ARG_VAR([OPENSSL_CFLAGS], [C compiler flags for OpenSSL])
>  	AC_ARG_VAR([OPENSSL_LIBS], [linker flags for OpenSSL])
>  
> @@ -958,11 +951,10 @@ if test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "openssl"; then
>  	CFLAGS="${saved_CFLAGS}"
>  	LIBS="${saved_LIBS}"
>  
> -	have_crypto="yes"
> -	AC_DEFINE([ENABLE_CRYPTO_OPENSSL], [1], [Use OpenSSL library])
> +	AC_DEFINE([CRYPTO_OPENSSL], [1], [Use OpenSSL library])

Why rename this (and ENABLE_CRYPTO_MBEDTLS)?  All our configure feature
flags currently have this ENABLE_ prefix, and I'd personally prefer to
keep it for these too.  (Though I don't care enough to NAK.)

>  	CRYPTO_CFLAGS="${OPENSSL_CFLAGS}"
>  	CRYPTO_LIBS="${OPENSSL_LIBS}"
> -elif test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "mbedtls"; then
> +elif test "${with_crypto_library}" = "mbedtls"; then
>  	AC_ARG_VAR([MBEDTLS_CFLAGS], [C compiler flags for mbedtls])
>  	AC_ARG_VAR([MBEDTLS_LIBS], [linker flags for mbedtls])
>  
> @@ -1041,11 +1033,10 @@ elif test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "mbedtls"; th
>  
>  	CFLAGS="${saved_CFLAGS}"
>  	LIBS="${saved_LIBS}"
> -	have_crypto="yes"
> -	AC_DEFINE([ENABLE_CRYPTO_MBEDTLS], [1], [Use mbed TLS library])
> +	AC_DEFINE([CRYPTO_MBEDTLS], [1], [Use mbed TLS library])
>  	CRYPTO_CFLAGS="${MBEDTLS_CFLAGS}"
>  	CRYPTO_LIBS="${MBEDTLS_LIBS}"
> -elif test "${enable_crypto}" = "yes"; then
> +else
>  	AC_MSG_ERROR([Invalid crypto library: ${with_crypto_library}])
>  fi
>  
> @@ -1245,14 +1236,10 @@ test "${enable_def_auth}" = "yes" && AC_DEFINE([ENABLE_DEF_AUTH], [1], [Enable d
>  test "${enable_pf}" = "yes" && AC_DEFINE([ENABLE_PF], [1], [Enable internal packet filter])
>  test "${enable_strict_options}" = "yes" && AC_DEFINE([ENABLE_STRICT_OPTIONS_CHECK], [1], [Enable strict options check between peers])
>  
> -if test "${enable_crypto}" = "yes"; then
> -	test "${have_crypto}" != "yes" && AC_MSG_ERROR([${with_crypto_library} crypto is required but missing])
> -	test "${enable_crypto_ofb_cfb}" = "yes" && AC_DEFINE([ENABLE_OFB_CFB_MODE], [1], [Enable OFB and CFB cipher modes])
> -	test "${have_crypto_aead_modes}" = "yes" && AC_DEFINE([HAVE_AEAD_CIPHER_MODES], [1], [Use crypto library])
> -	OPTIONAL_CRYPTO_CFLAGS="${OPTIONAL_CRYPTO_CFLAGS} ${CRYPTO_CFLAGS}"
> -	OPTIONAL_CRYPTO_LIBS="${OPTIONAL_CRYPTO_LIBS} ${CRYPTO_LIBS}"
> -	AC_DEFINE([ENABLE_CRYPTO], [1], [Enable crypto library])
> -fi
> +test "${enable_crypto_ofb_cfb}" = "yes" && AC_DEFINE([ENABLE_OFB_CFB_MODE], [1], [Enable OFB and CFB cipher modes])
> +test "${have_crypto_aead_modes}" = "yes" && AC_DEFINE([HAVE_AEAD_CIPHER_MODES], [1], [Use crypto library])
> +OPTIONAL_CRYPTO_CFLAGS="${OPTIONAL_CRYPTO_CFLAGS} ${CRYPTO_CFLAGS}"
> +OPTIONAL_CRYPTO_LIBS="${OPTIONAL_CRYPTO_LIBS} ${CRYPTO_LIBS}"
>  
>  if test "${enable_plugins}" = "yes"; then
>  	OPTIONAL_DL_LIBS="${DL_LIBS}"
> @@ -1292,7 +1279,6 @@ fi
>  
>  if test "${enable_pkcs11}" = "yes"; then
>  	test "${have_pkcs11_helper}" != "yes" && AC_MSG_ERROR([PKCS11 enabled but libpkcs11-helper is missing])
> -	test "${enable_crypto}" != "yes" && AC_MSG_ERROR([PKCS11 can be enabled only if crypto is enabled])
>  	OPTIONAL_PKCS11_HELPER_CFLAGS="${PKCS11_HELPER_CFLAGS}"
>  	OPTIONAL_PKCS11_HELPER_LIBS="${PKCS11_HELPER_LIBS}"
>  	AC_DEFINE([ENABLE_PKCS11], [1], [Enable PKCS11])
> @@ -1372,7 +1358,6 @@ AM_CONDITIONAL([WIN32], [test "${WIN32}" = "yes"])
>  AM_CONDITIONAL([GIT_CHECKOUT], [test "${GIT_CHECKOUT}" = "yes"])
>  AM_CONDITIONAL([ENABLE_PLUGIN_AUTH_PAM], [test "${enable_plugin_auth_pam}" = "yes"])
>  AM_CONDITIONAL([ENABLE_PLUGIN_DOWN_ROOT], [test "${enable_plugin_down_root}" = "yes"])
> -AM_CONDITIONAL([ENABLE_CRYPTO], [test "${enable_crypto}" = "yes"])
>  AM_CONDITIONAL([HAVE_LD_WRAP_SUPPORT], [test "${have_ld_wrap_support}" = "yes"])
>  
>  sampledir="\$(docdir)/sample"
> diff --git a/doc/doxygen/openvpn.doxyfile.in b/doc/doxygen/openvpn.doxyfile.in
> index bb56fff4..d9e9ed08 100644
> --- a/doc/doxygen/openvpn.doxyfile.in
> +++ b/doc/doxygen/openvpn.doxyfile.in
> @@ -235,7 +235,7 @@ EXPAND_ONLY_PREDEF     = NO
>  SEARCH_INCLUDES        = YES
>  INCLUDE_PATH           =
>  INCLUDE_FILE_PATTERNS  =
> -PREDEFINED             = _WIN32 NTLM USE_LZO ENABLE_FRAGMENT P2MP P2MP_SERVER ENABLE_CRYPTO ENABLE_CRYPTO_OPENSSL ENABLE_PLUGIN ENABLE_MANAGEMENT ENABLE_OCC HAVE_GETTIMEOFDAY
> +PREDEFINED             = _WIN32 NTLM USE_LZO ENABLE_FRAGMENT P2MP P2MP_SERVER ENABLE_CRYPTO_OPENSSL ENABLE_PLUGIN ENABLE_MANAGEMENT ENABLE_OCC HAVE_GETTIMEOFDAY
>  EXPAND_AS_DEFINED      =
>  SKIP_FUNCTION_MACROS   = YES
>  #---------------------------------------------------------------------------
> diff --git a/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c b/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c
> index c4839077..8ee78c53 100644
> --- a/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c
> +++ b/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c
> @@ -27,8 +27,6 @@
>   * See the README file for build instructions.
>   */
>  
> -#define ENABLE_CRYPTO
> -
>  #include <stdio.h>
>  #include <string.h>
>  #include <stdlib.h>
> diff --git a/sample/sample-plugins/log/log_v3.c b/sample/sample-plugins/log/log_v3.c
> index 98d80d95..3ff80290 100644
> --- a/sample/sample-plugins/log/log_v3.c
> +++ b/sample/sample-plugins/log/log_v3.c
> @@ -35,8 +35,6 @@
>  #include <string.h>
>  #include <stdlib.h>
>  
> -#define ENABLE_CRYPTO
> -
>  #include "openvpn-plugin.h"
>  
>  /*
> diff --git a/tests/Makefile.am b/tests/Makefile.am
> index 0795680c..0b32058b 100644
> --- a/tests/Makefile.am
> +++ b/tests/Makefile.am
> @@ -15,9 +15,7 @@ MAINTAINERCLEANFILES = \
>  SUBDIRS = unit_tests
>  
>  test_scripts = t_client.sh
> -if ENABLE_CRYPTO
> -test_scripts += t_lpback.sh t_cltsrv.sh
> -endif
> +#test_scripts += t_lpback.sh t_cltsrv.sh
>  
>  TESTS_ENVIRONMENT = top_srcdir="$(top_srcdir)"
>  TESTS = $(test_scripts)
> diff --git a/tests/unit_tests/openvpn/Makefile.am b/tests/unit_tests/openvpn/Makefile.am
> index 7b44f42e..055aa49d 100644
> --- a/tests/unit_tests/openvpn/Makefile.am
> +++ b/tests/unit_tests/openvpn/Makefile.am
> @@ -6,9 +6,7 @@ if HAVE_LD_WRAP_SUPPORT
>  check_PROGRAMS += argv_testdriver buffer_testdriver
>  endif
>  
> -if ENABLE_CRYPTO
> -check_PROGRAMS += packet_id_testdriver tls_crypt_testdriver
> -endif
> +#check_PROGRAMS += packet_id_testdriver tls_crypt_testdriver
>  
>  TESTS = $(check_PROGRAMS)
>  
> 

-Steffan

------------------------------------------------------------------------------
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Antonio Quartulli Dec. 3, 2017, 10:05 a.m. | #2
Hi,

On 03/12/17 17:39, Steffan Karger wrote:
> Hi,
> 
> Feature-ACK.
> 
> As discussed on IRC, let's apply this patch after 2/7 (or merge with
> 2/7) to prevent having a commit in the tree that unconditionally
> disabled crypto.

thanks for the review!

> 
> On 02-12-17 14:45, Antonio Quartulli wrote:
>> With this patch we remove the possibility to disable the crypto engine
>> (ENABLE_CRYPTO define) at configuration time.
>>
>> [Some unit-test are temporarily disabled and will be enabled again when
>> ENABLE_CRYPTO is completely removed from the codebase]
>>
>> [--disable-crypto has been removed from .travis.yml too]
>>
>> Signed-off-by: Antonio Quartulli <a@unstable.cc>
>> ---
>>  .travis.yml                                        |  2 +-
>>  config-msvc.h                                      |  1 -
>>  configure.ac                                       | 33 ++++++----------------
>>  doc/doxygen/openvpn.doxyfile.in                    |  2 +-
>>  .../keyingmaterialexporter.c                       |  2 --
>>  sample/sample-plugins/log/log_v3.c                 |  2 --
>>  tests/Makefile.am                                  |  4 +--
>>  tests/unit_tests/openvpn/Makefile.am               |  4 +--
>>  8 files changed, 13 insertions(+), 37 deletions(-)
>>
>> diff --git a/.travis.yml b/.travis.yml
>> index 366e6599..e89cb7d4 100644
>> --- a/.travis.yml
>> +++ b/.travis.yml
>> @@ -59,7 +59,7 @@ matrix:
>>      - env: SSLLIB="openssl" CHOST=i686-w64-mingw32
>>        os: linux
>>        compiler: ": Win32 build only"
>> -    - env: SSLLIB="openssl" EXTRA_CONFIG="--disable-crypto" EXTRA_SCRIPT="make distcheck"
>> +    - env: SSLLIB="openssl" EXTRA_SCRIPT="make distcheck"
>>        os: linux
>>        compiler: clang
>>      - env: SSLLIB="openssl" EXTRA_CONFIG="--disable-lzo"
>> diff --git a/config-msvc.h b/config-msvc.h
>> index 0bb153df..8be9195f 100644
>> --- a/config-msvc.h
>> +++ b/config-msvc.h
>> @@ -4,7 +4,6 @@
>>  
>>  #define ENABLE_DEF_AUTH 1
>>  #define ENABLE_PF 1
>> -#define ENABLE_CRYPTO 1
>>  #define ENABLE_CRYPTO_OPENSSL 1
>>  #define ENABLE_DEBUG 1
>>  #define ENABLE_EUREPHIA 1
>> diff --git a/configure.ac b/configure.ac
>> index acfddb22..faea7d15 100644
>> --- a/configure.ac
>> +++ b/configure.ac
>> @@ -77,13 +77,6 @@ AC_ARG_ENABLE(comp-stub,
>>  	[enable_comp_stub="no"]
>>  )
>>  
>> -AC_ARG_ENABLE(
>> -	[crypto],
>> -	[AS_HELP_STRING([--disable-crypto], [disable crypto support @<:@default=yes@:>@])],
>> -	,
>> -	[enable_crypto="yes"]
>> -)
>> -
>>  AC_ARG_ENABLE(
>>  	[ofb-cfb],
>>  	[AS_HELP_STRING([--disable-ofb-cfb], [disable support for OFB and CFB cipher modes @<:@default=yes@:>@])],
>> @@ -843,7 +836,7 @@ PKG_CHECK_MODULES(
>>  	[]
>>  )
>>  
>> -if test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "openssl"; then
>> +if test "${with_crypto_library}" = "openssl"; then
>>  	AC_ARG_VAR([OPENSSL_CFLAGS], [C compiler flags for OpenSSL])
>>  	AC_ARG_VAR([OPENSSL_LIBS], [linker flags for OpenSSL])
>>  
>> @@ -958,11 +951,10 @@ if test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "openssl"; then
>>  	CFLAGS="${saved_CFLAGS}"
>>  	LIBS="${saved_LIBS}"
>>  
>> -	have_crypto="yes"
>> -	AC_DEFINE([ENABLE_CRYPTO_OPENSSL], [1], [Use OpenSSL library])
>> +	AC_DEFINE([CRYPTO_OPENSSL], [1], [Use OpenSSL library])
> 
> Why rename this (and ENABLE_CRYPTO_MBEDTLS)?  All our configure feature
> flags currently have this ENABLE_ prefix, and I'd personally prefer to
> keep it for these too.  (Though I don't care enough to NAK.)
> 

I decided to remove the ENABLE_* bit because it felt to me like those
ENABLE_CRYPTO_$SOMETHING were "subdefines" of ENABLE_CRYPTO.

However, for consistency with the rest I also agree that it would be
better to keep the ENABLE_ prefix.

I'll send v2 of this patch only where I'll reintroduce the prefix.


Thanks!


>>  	CRYPTO_CFLAGS="${OPENSSL_CFLAGS}"
>>  	CRYPTO_LIBS="${OPENSSL_LIBS}"
>> -elif test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "mbedtls"; then
>> +elif test "${with_crypto_library}" = "mbedtls"; then
>>  	AC_ARG_VAR([MBEDTLS_CFLAGS], [C compiler flags for mbedtls])
>>  	AC_ARG_VAR([MBEDTLS_LIBS], [linker flags for mbedtls])
>>  
>> @@ -1041,11 +1033,10 @@ elif test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "mbedtls"; th
>>  
>>  	CFLAGS="${saved_CFLAGS}"
>>  	LIBS="${saved_LIBS}"
>> -	have_crypto="yes"
>> -	AC_DEFINE([ENABLE_CRYPTO_MBEDTLS], [1], [Use mbed TLS library])
>> +	AC_DEFINE([CRYPTO_MBEDTLS], [1], [Use mbed TLS library])
>>  	CRYPTO_CFLAGS="${MBEDTLS_CFLAGS}"
>>  	CRYPTO_LIBS="${MBEDTLS_LIBS}"
>> -elif test "${enable_crypto}" = "yes"; then
>> +else
>>  	AC_MSG_ERROR([Invalid crypto library: ${with_crypto_library}])
>>  fi
>>  
>> @@ -1245,14 +1236,10 @@ test "${enable_def_auth}" = "yes" && AC_DEFINE([ENABLE_DEF_AUTH], [1], [Enable d
>>  test "${enable_pf}" = "yes" && AC_DEFINE([ENABLE_PF], [1], [Enable internal packet filter])
>>  test "${enable_strict_options}" = "yes" && AC_DEFINE([ENABLE_STRICT_OPTIONS_CHECK], [1], [Enable strict options check between peers])
>>  
>> -if test "${enable_crypto}" = "yes"; then
>> -	test "${have_crypto}" != "yes" && AC_MSG_ERROR([${with_crypto_library} crypto is required but missing])
>> -	test "${enable_crypto_ofb_cfb}" = "yes" && AC_DEFINE([ENABLE_OFB_CFB_MODE], [1], [Enable OFB and CFB cipher modes])
>> -	test "${have_crypto_aead_modes}" = "yes" && AC_DEFINE([HAVE_AEAD_CIPHER_MODES], [1], [Use crypto library])
>> -	OPTIONAL_CRYPTO_CFLAGS="${OPTIONAL_CRYPTO_CFLAGS} ${CRYPTO_CFLAGS}"
>> -	OPTIONAL_CRYPTO_LIBS="${OPTIONAL_CRYPTO_LIBS} ${CRYPTO_LIBS}"
>> -	AC_DEFINE([ENABLE_CRYPTO], [1], [Enable crypto library])
>> -fi
>> +test "${enable_crypto_ofb_cfb}" = "yes" && AC_DEFINE([ENABLE_OFB_CFB_MODE], [1], [Enable OFB and CFB cipher modes])
>> +test "${have_crypto_aead_modes}" = "yes" && AC_DEFINE([HAVE_AEAD_CIPHER_MODES], [1], [Use crypto library])
>> +OPTIONAL_CRYPTO_CFLAGS="${OPTIONAL_CRYPTO_CFLAGS} ${CRYPTO_CFLAGS}"
>> +OPTIONAL_CRYPTO_LIBS="${OPTIONAL_CRYPTO_LIBS} ${CRYPTO_LIBS}"
>>  
>>  if test "${enable_plugins}" = "yes"; then
>>  	OPTIONAL_DL_LIBS="${DL_LIBS}"
>> @@ -1292,7 +1279,6 @@ fi
>>  
>>  if test "${enable_pkcs11}" = "yes"; then
>>  	test "${have_pkcs11_helper}" != "yes" && AC_MSG_ERROR([PKCS11 enabled but libpkcs11-helper is missing])
>> -	test "${enable_crypto}" != "yes" && AC_MSG_ERROR([PKCS11 can be enabled only if crypto is enabled])
>>  	OPTIONAL_PKCS11_HELPER_CFLAGS="${PKCS11_HELPER_CFLAGS}"
>>  	OPTIONAL_PKCS11_HELPER_LIBS="${PKCS11_HELPER_LIBS}"
>>  	AC_DEFINE([ENABLE_PKCS11], [1], [Enable PKCS11])
>> @@ -1372,7 +1358,6 @@ AM_CONDITIONAL([WIN32], [test "${WIN32}" = "yes"])
>>  AM_CONDITIONAL([GIT_CHECKOUT], [test "${GIT_CHECKOUT}" = "yes"])
>>  AM_CONDITIONAL([ENABLE_PLUGIN_AUTH_PAM], [test "${enable_plugin_auth_pam}" = "yes"])
>>  AM_CONDITIONAL([ENABLE_PLUGIN_DOWN_ROOT], [test "${enable_plugin_down_root}" = "yes"])
>> -AM_CONDITIONAL([ENABLE_CRYPTO], [test "${enable_crypto}" = "yes"])
>>  AM_CONDITIONAL([HAVE_LD_WRAP_SUPPORT], [test "${have_ld_wrap_support}" = "yes"])
>>  
>>  sampledir="\$(docdir)/sample"
>> diff --git a/doc/doxygen/openvpn.doxyfile.in b/doc/doxygen/openvpn.doxyfile.in
>> index bb56fff4..d9e9ed08 100644
>> --- a/doc/doxygen/openvpn.doxyfile.in
>> +++ b/doc/doxygen/openvpn.doxyfile.in
>> @@ -235,7 +235,7 @@ EXPAND_ONLY_PREDEF     = NO
>>  SEARCH_INCLUDES        = YES
>>  INCLUDE_PATH           =
>>  INCLUDE_FILE_PATTERNS  =
>> -PREDEFINED             = _WIN32 NTLM USE_LZO ENABLE_FRAGMENT P2MP P2MP_SERVER ENABLE_CRYPTO ENABLE_CRYPTO_OPENSSL ENABLE_PLUGIN ENABLE_MANAGEMENT ENABLE_OCC HAVE_GETTIMEOFDAY
>> +PREDEFINED             = _WIN32 NTLM USE_LZO ENABLE_FRAGMENT P2MP P2MP_SERVER ENABLE_CRYPTO_OPENSSL ENABLE_PLUGIN ENABLE_MANAGEMENT ENABLE_OCC HAVE_GETTIMEOFDAY
>>  EXPAND_AS_DEFINED      =
>>  SKIP_FUNCTION_MACROS   = YES
>>  #---------------------------------------------------------------------------
>> diff --git a/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c b/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c
>> index c4839077..8ee78c53 100644
>> --- a/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c
>> +++ b/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c
>> @@ -27,8 +27,6 @@
>>   * See the README file for build instructions.
>>   */
>>  
>> -#define ENABLE_CRYPTO
>> -
>>  #include <stdio.h>
>>  #include <string.h>
>>  #include <stdlib.h>
>> diff --git a/sample/sample-plugins/log/log_v3.c b/sample/sample-plugins/log/log_v3.c
>> index 98d80d95..3ff80290 100644
>> --- a/sample/sample-plugins/log/log_v3.c
>> +++ b/sample/sample-plugins/log/log_v3.c
>> @@ -35,8 +35,6 @@
>>  #include <string.h>
>>  #include <stdlib.h>
>>  
>> -#define ENABLE_CRYPTO
>> -
>>  #include "openvpn-plugin.h"
>>  
>>  /*
>> diff --git a/tests/Makefile.am b/tests/Makefile.am
>> index 0795680c..0b32058b 100644
>> --- a/tests/Makefile.am
>> +++ b/tests/Makefile.am
>> @@ -15,9 +15,7 @@ MAINTAINERCLEANFILES = \
>>  SUBDIRS = unit_tests
>>  
>>  test_scripts = t_client.sh
>> -if ENABLE_CRYPTO
>> -test_scripts += t_lpback.sh t_cltsrv.sh
>> -endif
>> +#test_scripts += t_lpback.sh t_cltsrv.sh
>>  
>>  TESTS_ENVIRONMENT = top_srcdir="$(top_srcdir)"
>>  TESTS = $(test_scripts)
>> diff --git a/tests/unit_tests/openvpn/Makefile.am b/tests/unit_tests/openvpn/Makefile.am
>> index 7b44f42e..055aa49d 100644
>> --- a/tests/unit_tests/openvpn/Makefile.am
>> +++ b/tests/unit_tests/openvpn/Makefile.am
>> @@ -6,9 +6,7 @@ if HAVE_LD_WRAP_SUPPORT
>>  check_PROGRAMS += argv_testdriver buffer_testdriver
>>  endif
>>  
>> -if ENABLE_CRYPTO
>> -check_PROGRAMS += packet_id_testdriver tls_crypt_testdriver
>> -endif
>> +#check_PROGRAMS += packet_id_testdriver tls_crypt_testdriver
>>  
>>  TESTS = $(check_PROGRAMS)
>>  
>>
> 
> -Steffan
> 
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
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> Openvpn-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/openvpn-devel
>

Patch

diff --git a/.travis.yml b/.travis.yml
index 366e6599..e89cb7d4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -59,7 +59,7 @@  matrix:
     - env: SSLLIB="openssl" CHOST=i686-w64-mingw32
       os: linux
       compiler: ": Win32 build only"
-    - env: SSLLIB="openssl" EXTRA_CONFIG="--disable-crypto" EXTRA_SCRIPT="make distcheck"
+    - env: SSLLIB="openssl" EXTRA_SCRIPT="make distcheck"
       os: linux
       compiler: clang
     - env: SSLLIB="openssl" EXTRA_CONFIG="--disable-lzo"
diff --git a/config-msvc.h b/config-msvc.h
index 0bb153df..8be9195f 100644
--- a/config-msvc.h
+++ b/config-msvc.h
@@ -4,7 +4,6 @@ 
 
 #define ENABLE_DEF_AUTH 1
 #define ENABLE_PF 1
-#define ENABLE_CRYPTO 1
 #define ENABLE_CRYPTO_OPENSSL 1
 #define ENABLE_DEBUG 1
 #define ENABLE_EUREPHIA 1
diff --git a/configure.ac b/configure.ac
index acfddb22..faea7d15 100644
--- a/configure.ac
+++ b/configure.ac
@@ -77,13 +77,6 @@  AC_ARG_ENABLE(comp-stub,
 	[enable_comp_stub="no"]
 )
 
-AC_ARG_ENABLE(
-	[crypto],
-	[AS_HELP_STRING([--disable-crypto], [disable crypto support @<:@default=yes@:>@])],
-	,
-	[enable_crypto="yes"]
-)
-
 AC_ARG_ENABLE(
 	[ofb-cfb],
 	[AS_HELP_STRING([--disable-ofb-cfb], [disable support for OFB and CFB cipher modes @<:@default=yes@:>@])],
@@ -843,7 +836,7 @@  PKG_CHECK_MODULES(
 	[]
 )
 
-if test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "openssl"; then
+if test "${with_crypto_library}" = "openssl"; then
 	AC_ARG_VAR([OPENSSL_CFLAGS], [C compiler flags for OpenSSL])
 	AC_ARG_VAR([OPENSSL_LIBS], [linker flags for OpenSSL])
 
@@ -958,11 +951,10 @@  if test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "openssl"; then
 	CFLAGS="${saved_CFLAGS}"
 	LIBS="${saved_LIBS}"
 
-	have_crypto="yes"
-	AC_DEFINE([ENABLE_CRYPTO_OPENSSL], [1], [Use OpenSSL library])
+	AC_DEFINE([CRYPTO_OPENSSL], [1], [Use OpenSSL library])
 	CRYPTO_CFLAGS="${OPENSSL_CFLAGS}"
 	CRYPTO_LIBS="${OPENSSL_LIBS}"
-elif test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "mbedtls"; then
+elif test "${with_crypto_library}" = "mbedtls"; then
 	AC_ARG_VAR([MBEDTLS_CFLAGS], [C compiler flags for mbedtls])
 	AC_ARG_VAR([MBEDTLS_LIBS], [linker flags for mbedtls])
 
@@ -1041,11 +1033,10 @@  elif test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "mbedtls"; th
 
 	CFLAGS="${saved_CFLAGS}"
 	LIBS="${saved_LIBS}"
-	have_crypto="yes"
-	AC_DEFINE([ENABLE_CRYPTO_MBEDTLS], [1], [Use mbed TLS library])
+	AC_DEFINE([CRYPTO_MBEDTLS], [1], [Use mbed TLS library])
 	CRYPTO_CFLAGS="${MBEDTLS_CFLAGS}"
 	CRYPTO_LIBS="${MBEDTLS_LIBS}"
-elif test "${enable_crypto}" = "yes"; then
+else
 	AC_MSG_ERROR([Invalid crypto library: ${with_crypto_library}])
 fi
 
@@ -1245,14 +1236,10 @@  test "${enable_def_auth}" = "yes" && AC_DEFINE([ENABLE_DEF_AUTH], [1], [Enable d
 test "${enable_pf}" = "yes" && AC_DEFINE([ENABLE_PF], [1], [Enable internal packet filter])
 test "${enable_strict_options}" = "yes" && AC_DEFINE([ENABLE_STRICT_OPTIONS_CHECK], [1], [Enable strict options check between peers])
 
-if test "${enable_crypto}" = "yes"; then
-	test "${have_crypto}" != "yes" && AC_MSG_ERROR([${with_crypto_library} crypto is required but missing])
-	test "${enable_crypto_ofb_cfb}" = "yes" && AC_DEFINE([ENABLE_OFB_CFB_MODE], [1], [Enable OFB and CFB cipher modes])
-	test "${have_crypto_aead_modes}" = "yes" && AC_DEFINE([HAVE_AEAD_CIPHER_MODES], [1], [Use crypto library])
-	OPTIONAL_CRYPTO_CFLAGS="${OPTIONAL_CRYPTO_CFLAGS} ${CRYPTO_CFLAGS}"
-	OPTIONAL_CRYPTO_LIBS="${OPTIONAL_CRYPTO_LIBS} ${CRYPTO_LIBS}"
-	AC_DEFINE([ENABLE_CRYPTO], [1], [Enable crypto library])
-fi
+test "${enable_crypto_ofb_cfb}" = "yes" && AC_DEFINE([ENABLE_OFB_CFB_MODE], [1], [Enable OFB and CFB cipher modes])
+test "${have_crypto_aead_modes}" = "yes" && AC_DEFINE([HAVE_AEAD_CIPHER_MODES], [1], [Use crypto library])
+OPTIONAL_CRYPTO_CFLAGS="${OPTIONAL_CRYPTO_CFLAGS} ${CRYPTO_CFLAGS}"
+OPTIONAL_CRYPTO_LIBS="${OPTIONAL_CRYPTO_LIBS} ${CRYPTO_LIBS}"
 
 if test "${enable_plugins}" = "yes"; then
 	OPTIONAL_DL_LIBS="${DL_LIBS}"
@@ -1292,7 +1279,6 @@  fi
 
 if test "${enable_pkcs11}" = "yes"; then
 	test "${have_pkcs11_helper}" != "yes" && AC_MSG_ERROR([PKCS11 enabled but libpkcs11-helper is missing])
-	test "${enable_crypto}" != "yes" && AC_MSG_ERROR([PKCS11 can be enabled only if crypto is enabled])
 	OPTIONAL_PKCS11_HELPER_CFLAGS="${PKCS11_HELPER_CFLAGS}"
 	OPTIONAL_PKCS11_HELPER_LIBS="${PKCS11_HELPER_LIBS}"
 	AC_DEFINE([ENABLE_PKCS11], [1], [Enable PKCS11])
@@ -1372,7 +1358,6 @@  AM_CONDITIONAL([WIN32], [test "${WIN32}" = "yes"])
 AM_CONDITIONAL([GIT_CHECKOUT], [test "${GIT_CHECKOUT}" = "yes"])
 AM_CONDITIONAL([ENABLE_PLUGIN_AUTH_PAM], [test "${enable_plugin_auth_pam}" = "yes"])
 AM_CONDITIONAL([ENABLE_PLUGIN_DOWN_ROOT], [test "${enable_plugin_down_root}" = "yes"])
-AM_CONDITIONAL([ENABLE_CRYPTO], [test "${enable_crypto}" = "yes"])
 AM_CONDITIONAL([HAVE_LD_WRAP_SUPPORT], [test "${have_ld_wrap_support}" = "yes"])
 
 sampledir="\$(docdir)/sample"
diff --git a/doc/doxygen/openvpn.doxyfile.in b/doc/doxygen/openvpn.doxyfile.in
index bb56fff4..d9e9ed08 100644
--- a/doc/doxygen/openvpn.doxyfile.in
+++ b/doc/doxygen/openvpn.doxyfile.in
@@ -235,7 +235,7 @@  EXPAND_ONLY_PREDEF     = NO
 SEARCH_INCLUDES        = YES
 INCLUDE_PATH           =
 INCLUDE_FILE_PATTERNS  =
-PREDEFINED             = _WIN32 NTLM USE_LZO ENABLE_FRAGMENT P2MP P2MP_SERVER ENABLE_CRYPTO ENABLE_CRYPTO_OPENSSL ENABLE_PLUGIN ENABLE_MANAGEMENT ENABLE_OCC HAVE_GETTIMEOFDAY
+PREDEFINED             = _WIN32 NTLM USE_LZO ENABLE_FRAGMENT P2MP P2MP_SERVER ENABLE_CRYPTO_OPENSSL ENABLE_PLUGIN ENABLE_MANAGEMENT ENABLE_OCC HAVE_GETTIMEOFDAY
 EXPAND_AS_DEFINED      =
 SKIP_FUNCTION_MACROS   = YES
 #---------------------------------------------------------------------------
diff --git a/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c b/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c
index c4839077..8ee78c53 100644
--- a/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c
+++ b/sample/sample-plugins/keying-material-exporter-demo/keyingmaterialexporter.c
@@ -27,8 +27,6 @@ 
  * See the README file for build instructions.
  */
 
-#define ENABLE_CRYPTO
-
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
diff --git a/sample/sample-plugins/log/log_v3.c b/sample/sample-plugins/log/log_v3.c
index 98d80d95..3ff80290 100644
--- a/sample/sample-plugins/log/log_v3.c
+++ b/sample/sample-plugins/log/log_v3.c
@@ -35,8 +35,6 @@ 
 #include <string.h>
 #include <stdlib.h>
 
-#define ENABLE_CRYPTO
-
 #include "openvpn-plugin.h"
 
 /*
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 0795680c..0b32058b 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -15,9 +15,7 @@  MAINTAINERCLEANFILES = \
 SUBDIRS = unit_tests
 
 test_scripts = t_client.sh
-if ENABLE_CRYPTO
-test_scripts += t_lpback.sh t_cltsrv.sh
-endif
+#test_scripts += t_lpback.sh t_cltsrv.sh
 
 TESTS_ENVIRONMENT = top_srcdir="$(top_srcdir)"
 TESTS = $(test_scripts)
diff --git a/tests/unit_tests/openvpn/Makefile.am b/tests/unit_tests/openvpn/Makefile.am
index 7b44f42e..055aa49d 100644
--- a/tests/unit_tests/openvpn/Makefile.am
+++ b/tests/unit_tests/openvpn/Makefile.am
@@ -6,9 +6,7 @@  if HAVE_LD_WRAP_SUPPORT
 check_PROGRAMS += argv_testdriver buffer_testdriver
 endif
 
-if ENABLE_CRYPTO
-check_PROGRAMS += packet_id_testdriver tls_crypt_testdriver
-endif
+#check_PROGRAMS += packet_id_testdriver tls_crypt_testdriver
 
 TESTS = $(check_PROGRAMS)