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For benchmarking purposes provide wrappers around OpenSSL AES GCM
implementation. Note, digest callback will work only for encryption due
to OpenSSL internals.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>

The nettle-benchmark program currently uses the openssl low level
cipher APIs for benchmarking. This means it always runs the generic
software implementation, never able to take advantage of impls
optimized for new hardware (eg AES-NI).

Rewriting it to use the higher EVP APIs means we can use the same
code for all ciphers, and automatically trigger hardware optimized
versions, giving a fairer comparison against openssl as commonly
used in applications.

Use of the generic openssl impl can still be forced by setting an
env variable  OPENSSL_ia32cap="~0x200000200000000"
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

* nettle-internal.h (NETTLE_MAX_HASH_CONTEXT_SIZE): New constant.
* testsuite/meta-hash-test.c (test_main): Add sanity check for
NETTLE_MAX_HASH_CONTEXT_SIZE.

Do benchmarking of arcfour, salsa20 and chacha via time_aead.

Rev: nettle/ChangeLog:1.207
Rev: nettle/nettle-internal.h:1.4

authenticated encryption with associated data.

Rev: nettle/nettle-internal.h:1.3

(NETTLE_MAX_HASH_DIGEST_SIZE): Increased, to take sha512 into
account.

Rev: nettle/nettle-internal.h:1.2

(nettle_openssl_sha1): Declare.

Rev: src/nettle/nettle-internal.h:1.9

(nettle_openssl_aes256, nettle_openssl_arcfour128): Declare.

Rev: src/nettle/nettle-internal.h:1.8

Rev: src/nettle/nettle-internal.h:1.7

Rev: src/nettle/ChangeLog:1.241
Rev: src/nettle/nettle-internal.h:1.6

available.

Rev: src/nettle/nettle-internal.h:1.5

is unavailable, they work by allocating a fix amount of stack and
imposing a hard limit on what can be allocated.

Rev: src/nettle/nettle-internal.h:1.4

Rev: src/nettle/nettle-internal.h:1.3

Rev: src/nettle/nettle-internal.h:1.2

Rev: src/nettle/nettle-internal.c:1.1
Rev: src/nettle/nettle-internal.h:1.1

* arcfour-meta.c: New file.
* cast128-meta.c: New file.
* serpent-meta.c: New file.
* twofish-meta.c: New file.

Rev: src/nettle/aes-meta.c:1.1
Rev: src/nettle/arcfour-meta.c:1.1
Rev: src/nettle/cast128-meta.c:1.1
Rev: src/nettle/serpent-meta.c:1.1
Rev: src/nettle/twofish-meta.c:1.1

Rev: src/nettle/hmac-md5.c:1.1
Rev: src/nettle/hmac.c:1.1
Rev: src/nettle/hmac.h:1.1
Rev: src/nettle/md5-meta.c:1.1
Rev: src/nettle/nettle-meta.h:1.1
Rev: src/nettle/sha1-meta.c:1.1
Rev: src/nettle/sha256-meta.c:1.1

Rev: src/nettle/md5-compat.c:1.2

1321-style interface.

Rev: src/nettle/md5-compat.c:1.1
Rev: src/nettle/md5-compat.h:1.1

Rev: src/nettle/ChangeLog:1.10
Rev: src/nettle/aes.h:1.4
Rev: src/nettle/arcfour.h:1.3
Rev: src/nettle/blowfish.h:1.7
Rev: src/nettle/cast128.h:1.3
Rev: src/nettle/des.h:1.4
Rev: src/nettle/md5.h:1.3
Rev: src/nettle/memxor.h:1.2
Rev: src/nettle/serpent.h:1.5
Rev: src/nettle/sha1.h:1.3
Rev: src/nettle/twofish.h:1.4