use SIPHASH 1-3 as the default 64 bit hash

Stadtx should be deprecated and removed after this

2 files changed, 5 insertions, 2 deletions

diff --git a/INSTALL b/INSTALL
index 10467fc4c9..1878b0ed2c 100644
--- a/INSTALL
+++ b/INSTALL
@@ -368,7 +368,7 @@ insecure and are not recommended for production use.>
 
 Since Perl 5.18 we have included support for multiple hash functions,
 although from time to time we change which functions we support,
-and which function is default (currently SBOX+STADTX on 64 bit builds
+and which function is default (currently SBOX+SIPHASH13 on 64 bit builds
 and SBOX+ZAPHOD32 for 32 bit builds). You can choose a different
 algorithm by defining one of the following symbols during configure.
 Note that there are security implications regarding which hash function you choose
@@ -380,6 +380,9 @@ to be, with the one believed to be most secure at release time being PERL_HASH_F
     PERL_HASH_FUNC_ZAPHOD32
     PERL_HASH_FUNC_STADTX
 
+Note that use of PERL_HASH_FUNC_STADTX is deprecated and will be removed
+in a future release.
+
 In addition, these, (or custom hash functions), may be "fronted" by the
 SBOX32 hash function for keys under a chosen size. This hash function is
 special in that it has proven theoretical security properties, and is very
diff --git a/hv_func.h b/hv_func.h
index 7661f4076c..6bbf41ee9d 100644
--- a/hv_func.h
+++ b/hv_func.h
@@ -17,7 +17,7 @@
         || defined(PERL_HASH_FUNC_ZAPHOD32) \
     )
 #   ifdef CAN64BITHASH
-#       define PERL_HASH_FUNC_STADTX
+#       define PERL_HASH_FUNC_SIPHASH13
 #   else
 #       define PERL_HASH_FUNC_ZAPHOD32
 #   endif