Add framework to eventually support SHA3.

* src/gcrypt.h.in (GCRY_MD_SHA3_224, GCRY_MD_SHA3_256)
(GCRY_MD_SHA3_384, GCRY_MD_SHA3_512): New.
(GCRY_MAC_HMAC_SHA3_224, GCRY_MAC_HMAC_SHA3_256)
(GCRY_MAC_HMAC_SHA3_384, GCRY_MAC_HMAC_SHA3_512): New.
* cipher/keccak.c: New with stub functions.
* cipher/Makefile.am (EXTRA_libcipher_la_SOURCES): Add keccak.c.
* configure.ac (available_digests): Add sha3.
(USE_SHA3): New.
* src/fips.c (run_hmac_selftests): Add SHA3 to the required selftests.
* cipher/md.c (digest_list) [USE_SHA3]: Add standard SHA3 algos.
(md_open): Ditto for hmac processing.
* cipher/mac-hmac.c (map_mac_algo_to_md): Add mapping.
* cipher/hmac-tests.c (run_selftests): Prepare for tests.
* cipher/pubkey-util.c (get_hash_algo): Add "sha3-xxx".
--

Note that the algo GCRY_MD_SHA3_xxx are prelimanry.  We should try to
sync them with OpenPGP.

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 19 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 0f16175b..48e21794 100644
--- a/configure.ac
+++ b/configure.ac
@@ -198,7 +198,7 @@ enabled_pubkey_ciphers=""
 
 # Definitions for message digests.
 available_digests="crc gostr3411-94 md2 md4 md5 rmd160 sha1 sha256"
-available_digests_64="sha512 tiger whirlpool stribog"
+available_digests_64="sha512 sha3 tiger whirlpool stribog"
 enabled_digests=""
 
 # Definitions for kdfs (optional ones)
@@ -2094,6 +2094,24 @@ if test "$found" = "1" ; then
    fi
 fi
 
+LIST_MEMBER(sha3, $enabled_digests)
+if test "$found" = "1" ; then
+   GCRYPT_DIGESTS="$GCRYPT_DIGESTS keccak.lo"
+   AC_DEFINE(USE_SHA3, 1, [Defined if this module should be included])
+
+   case "${host}" in
+      x86_64-*-*)
+         # Build with the assembly implementation
+         :
+      ;;
+   esac
+
+   if test x"$neonsupport" = xyes ; then
+     # Build with the NEON implementation
+     :
+   fi
+fi
+
 LIST_MEMBER(tiger, $enabled_digests)
 if test "$found" = "1" ; then
    GCRYPT_DIGESTS="$GCRYPT_DIGESTS tiger.lo"