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It's either "GNU *Library* General Public License version 2" or "GNU
Lesser General Public License version *2.1*", but there was no "version
2.0" of the "Lesser" license. So assume that version 2.1 is meant here.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Encouraging the compiler to inline xts_tweak_encdec increases the
performance for xts-aes-128 when built with gcrypt:
Encrypt: 545 MB/s -> 580 MB/s
Decrypt: 568 MB/s -> 602 MB/s
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Using 64-bit arithmetic increases the performance for xts-aes-128
when built with gcrypt:
Encrypt: 355 MB/s -> 545 MB/s
Decrypt: 362 MB/s -> 568 MB/s
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Using 64-bit arithmetic increases the performance for xts-aes-128
when built with gcrypt:
Encrypt: 272 MB/s -> 355 MB/s
Decrypt: 275 MB/s -> 362 MB/s
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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The new type is designed to allow use of 64-bit arithmetic instead
of operating 1-byte at a time. The following patches will use this to
improve performance.
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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The tweak encrypt/decrypt functions are identical except for the
comments, so can be merged. Profiling data shows that the compiler is
in fact already merging the two merges in the object files.
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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The XTS (XEX with tweaked-codebook and ciphertext stealing)
cipher mode is commonly used in full disk encryption. There
is unfortunately no implementation of it in either libgcrypt
or nettle, so we need to provide our own.
The libtomcrypt project provides a repository of crypto
algorithms under a choice of either "public domain" or
the "what the fuck public license".
So this impl is taken from the libtomcrypt GIT repo and
adapted to be compatible with the way we need to call
ciphers provided by nettle/gcrypt.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
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