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package/libssh2: Add selectable crypto libraries

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Currently, the selection of the backend is based on a priority order,
which is not always desirable: not all features are available for all
backends, as reported upstream:
    https://github.com/libssh2/libssh2/issues/213
In that particular case, the problem is that libgcrypt is unable to
read encrypted certificates created with openssl, but it is likely
that other incompatibilities exist as well.

As such, allow a user to select the backend most appropriate to their
use-case.

Note that this changes the defaults: previously, if openssl was already
selected and we additionally select libssh2, openssl would be used as
a backend. Now, mbedtls is the default so if the user doesn't change
it, mbedtls will be used.

Signed-off-by: Sam Voss <sam.voss@rockwellcollins.com>
[Arnout: remove now-unneeded comment in .mk file]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
This commit is contained in:
Sam Voss
2017-11-01 11:22:56 -05:00
committed by Arnout Vandecappelle (Essensium/Mind)
parent 2abe371c53
commit 04a1031d34
2 changed files with 26 additions and 6 deletions
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8
package/libssh2/libssh2.mk
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@@ -14,20 +14,18 @@ LIBSSH2_CONF_OPTS = --disable-examples-build
# building from a git clone
LIBSSH2_AUTORECONF = YES
# Dependency is one of mbedtls, libgcrypt or openssl, guaranteed in
# Config.in. Favour mbedtls.
ifeq ($(BR2_PACKAGE_MBEDTLS),y)
ifeq ($(BR2_PACKAGE_LIBSSH2_MBEDTLS),y)
LIBSSH2_DEPENDENCIES += mbedtls
LIBSSH2_CONF_OPTS += --with-libmbedcrypto-prefix=$(STAGING_DIR)/usr \
--with-crypto=mbedtls
else ifeq ($(BR2_PACKAGE_LIBGCRYPT),y)
else ifeq ($(BR2_PACKAGE_LIBSSH2_LIBGCRYPT),y)
LIBSSH2_DEPENDENCIES += libgcrypt
LIBSSH2_CONF_OPTS += --with-libgcrypt-prefix=$(STAGING_DIR)/usr \
--with-crypto=libgcrypt
# configure.ac forgets to link to dependent libraries of gcrypt breaking static
# linking
LIBSSH2_CONF_ENV += LIBS="`$(STAGING_DIR)/usr/bin/libgcrypt-config --libs`"
else
else ifeq ($(BR2_PACKAGE_LIBSSH2_OPENSSL),y)
LIBSSH2_DEPENDENCIES += openssl
LIBSSH2_CONF_OPTS += --with-libssl-prefix=$(STAGING_DIR)/usr \
--with-crypto=openssl