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Currently the crypto layer exposes support for a 'des-rfb'
algorithm which is just normal single-DES, with the bits
in each key byte reversed. This special key munging is
required by the RFB protocol password authentication
mechanism.
Since the crypto layer is generic shared code, it makes
more sense to do the key byte munging in the VNC server
code, and expose normal single-DES support.
Replacing cipher 'des-rfb' by 'des' looks like an incompatible
interface change, but it doesn't matter. While the QMP schema
allows any QCryptoCipherAlgorithm for the 'cipher-alg' field
in QCryptoBlockCreateOptionsLUKS, the code restricts what can
be used at runtime. Thus the only effect is a change in error
message.
Original behaviour:
$ qemu-img create -f luks --object secret,id=sec0,data=123 -o cipher-alg=des-rfb,key-secret=sec0 demo.luks 1G
Formatting 'demo.luks', fmt=luks size=1073741824 key-secret=sec0 cipher-alg=des-rfb
qemu-img: demo.luks: Algorithm 'des-rfb' not supported
New behaviour:
$ qemu-img create -f luks --object secret,id=sec0,data=123 -o cipher-alg=des-rfb,key-secret=sec0 demo.luks 1G
Formatting 'demo.luks', fmt=luks size=1073741824 key-secret=sec0 cipher-alg=des-fish
qemu-img: demo.luks: Invalid parameter 'des-rfb'
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Now that we only support modern nettle, we don't need to have local
typedefs to mask the real nettle types.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210514120415.1368922-5-berrange@redhat.com>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
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It has been over two years since RHEL-8 was released, and thus per the
platform build policy, we no longer need to support RHEL-7 as a build
target. This lets us increment the minimum required nettle version and
drop a lot of backwards compatibility code for 2.x series of nettle.
Per repology, current shipping versions are:
RHEL-8: 3.4.1
Debian Buster: 3.4.1
openSUSE Leap 15.2: 3.4.1
Ubuntu LTS 18.04: 3.4
Ubuntu LTS 20.04: 3.5.1
FreeBSD: 3.7.2
Fedora 33: 3.5.1
Fedora 34: 3.7.2
OpenBSD: 3.7.2
macOS HomeBrew: 3.7.2
Ubuntu LTS 18.04 has the oldest version and so 3.4 is the new minimum.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210514120415.1368922-4-berrange@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
[thuth: rebased to use .gitlab-ci.d/buildtest.yml]
Signed-off-by: Thomas Huth <thuth@redhat.com>
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Use separate classes for each cipher entry point: des_rfb, des3,
aes128, aes192, aes256, cast128, serpent, and twofish.
Generate wrappers for XTS only for CONFIG_QEMU_PRIVATE_XTS.
This eliminates unreachable wrappers for DES_RFB, DES3 and
CAST128, which have blocksizes that do not allow XTS mode.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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The class vtable should be set by the class initializer.
This will also allow additional subclassing, reducing the
amount of indirection in the hierarchy.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Merge the allocation of "opaque" into the allocation of "cipher".
This is step one in reducing the indirection in these classes.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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This allows the in memory structures to be read-only.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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The fourth argument to xts_encrypt should be the decrypt
callback; we were accidentally passing encrypt twice.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Both qemu/osdep.h and cipherpriv.h have already been
included by the parent cipher.c.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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QEMU standard procedure for included c files is to use *.c.inc.
E.g. there are a different set of checks that are applied.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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