* src/hash-common.c (_gcry_hash_selftest_check_one): Add handling for
XOFs.
* src/keccak.c (keccak_ops_t): Rename 'extract_inplace' to 'extract'
and add 'pos' argument.
(KECCAK_CONTEXT): Add 'suffix'.
(keccak_extract_inplace64): Rename to...
(keccak_extract64): ...this; Add handling for 'pos' argument.
(keccak_extract_inplace32bi): Rename to...
(keccak_extract32bi): ...this; Add handling for 'pos' argument.
(keccak_extract_inplace64): Rename to...
(keccak_extract64): ...this; Add handling for 'pos' argument.
(keccak_extract_inplace32bi_bmi2): Rename to...
(keccak_extract32bi_bmi2): ...this; Add handling for 'pos' argument.
(keccak_init): Setup 'suffix'; add SHAKE128 & SHAKE256.
(shake128_init, shake256_init): New.
(keccak_final): Do not initial permute for SHAKE output; use correct
suffix for SHAKE.
(keccak_extract): New.
(keccak_selftests_keccak): Add SHAKE128 & SHAKE256 test-vectors.
(run_selftests): Add SHAKE128 & SHAKE256.
(shake128_asn, oid_spec_shake128, shake256_asn, oid_spec_shake256)
(_gcry_digest_spec_shake128, _gcry_digest_spec_shake256): New.
* cipher/md.c (digest_list): Add SHAKE128 & SHAKE256.
* doc/gcrypt.texi: Ditto.
* src/cipher.h (_gcry_digest_spec_shake128)
(_gcry_digest_spec_shake256): New.
* src/gcrypt.h.in (GCRY_MD_SHAKE128, GCRY_MD_SHAKE256): New.
* tests/basic.c (check_one_md): Add XOF check; Add 'elen' argument.
(check_one_md_multi): Skip if algo is XOF.
(check_digests): Add SHAKE128 & SHAKE256 test vectors.
* tests/bench-slope.c (kdf_bench_one): Skip XOFs.