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crypto: prefer gnutls as the crypto backend if new enough

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If we have gnutls >= 3.6.13, then it has enough functionality
and performance that we can use it as the preferred crypto
backend.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2021-07-02 17:38:33 +01:00
parent 8c1d3dc772
commit 8bd0931f63
1 changed files with 35 additions and 24 deletions
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59
meson.build
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@ -846,39 +846,50 @@ if not get_option('gnutls').auto() or have_system
endif
endif
# Gcrypt has priority over nettle
# We prefer use of gnutls for crypto, unless the options
# explicitly asked for nettle or gcrypt.
#
# If gnutls isn't available for crypto, then we'll prefer
# gcrypt over nettle for performance reasons.
gcrypt = not_found
nettle = not_found
xts = 'none'
if get_option('nettle').enabled() and get_option('gcrypt').enabled()
error('Only one of gcrypt & nettle can be enabled')
elif (not get_option('gcrypt').auto() or have_system) and not get_option('nettle').enabled()
gcrypt = dependency('libgcrypt', version: '>=1.8',
method: 'config-tool',
required: get_option('gcrypt'),
kwargs: static_kwargs)
# Debian has removed -lgpg-error from libgcrypt-config
# as it "spreads unnecessary dependencies" which in
# turn breaks static builds...
if gcrypt.found() and enable_static
gcrypt = declare_dependency(dependencies: [
gcrypt,
cc.find_library('gpg-error', required: true, kwargs: static_kwargs)])
endif
endif
if (not get_option('nettle').auto() or have_system) and not gcrypt.found()
nettle = dependency('nettle', version: '>=3.4',
method: 'pkg-config',
required: get_option('nettle'),
kwargs: static_kwargs)
if nettle.found() and not cc.has_header('nettle/xts.h', dependencies: nettle)
xts = 'private'
endif
endif
if gcrypt.found() or nettle.found()
# Explicit nettle/gcrypt request, so ignore gnutls for crypto
if get_option('nettle').enabled() or get_option('gcrypt').enabled()
gnutls_crypto = not_found
endif
if not gnutls_crypto.found()
if (not get_option('gcrypt').auto() or have_system) and not get_option('nettle').enabled()
gcrypt = dependency('libgcrypt', version: '>=1.8',
method: 'config-tool',
required: get_option('gcrypt'),
kwargs: static_kwargs)
# Debian has removed -lgpg-error from libgcrypt-config
# as it "spreads unnecessary dependencies" which in
# turn breaks static builds...
if gcrypt.found() and enable_static
gcrypt = declare_dependency(dependencies: [
gcrypt,
cc.find_library('gpg-error', required: true, kwargs: static_kwargs)])
endif
endif
if (not get_option('nettle').auto() or have_system) and not gcrypt.found()
nettle = dependency('nettle', version: '>=3.4',
method: 'pkg-config',
required: get_option('nettle'),
kwargs: static_kwargs)
if nettle.found() and not cc.has_header('nettle/xts.h', dependencies: nettle)
xts = 'private'
endif
endif
endif
gtk = not_found
gtkx11 = not_found
vte = not_found