Add ZSTD compression support (RFC8478bis)

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18186)

1 files changed, 18 insertions, 1 deletions

diff --git a/Configure b/Configure
index 7f7c889227..3deeb030a2 100755
--- a/Configure
+++ b/Configure
@@ -517,6 +517,8 @@ my @disablables = (
     "whirlpool",
     "zlib",
     "zlib-dynamic",
+    "zstd",
+    "zstd-dynamic",
     );
 foreach my $proto ((@tls, @dtls))
         {
@@ -574,6 +576,8 @@ our %disabled = ( # "what"         => "comment"
                   "weak-ssl-ciphers"    => "default",
                   "zlib"                => "default",
                   "zlib-dynamic"        => "default",
+                  "zstd"                => "default",
+                  "zstd-dynamic"        => "default",
                 );
 
 # Note: => pair form used for aesthetics, not to truly make a hash table
@@ -602,6 +606,7 @@ my @disable_cascades = (
     "ssl3-method"       => [ "ssl3" ],
     "zlib"              => [ "zlib-dynamic" ],
     "brotli"            => [ "brotli-dynamic" ],
+    "zstd"              => [ "zstd-dynamic" ],
     "des"               => [ "mdc2" ],
     "ec"                => [ "ec2m", "ecdsa", "ecdh", "sm2", "gost" ],
     "dgram"             => [ "dtls", "quic", "sctp" ],
@@ -647,7 +652,7 @@ my @disable_cascades = (
     "stdio"             => [ "apps", "capieng", "egd" ],
     "apps"              => [ "tests" ],
     "tests"             => [ "external-tests" ],
-    "comp"              => [ "zlib", "brotli" ],
+    "comp"              => [ "zlib", "brotli", "zstd" ],
     "sm3"               => [ "sm2" ],
     sub { !$disabled{"unit-test"} } => [ "heartbeats" ],
 
@@ -912,6 +917,10 @@ while (@argvcopy)
                         {
                         delete $disabled{"brotli"};
                         }
+                elsif ($1 eq "zstd-dynamic")
+                        {
+                        delete $disabled{"zstd"};
+                        }
                 my $algo = $1;
                 delete $disabled{$algo};
 
@@ -996,6 +1005,14 @@ while (@argvcopy)
                         {
                         $withargs{brotli_include}=$1;
                         }
+                elsif (/^--with-zstd-lib=(.*)$/)
+                        {
+                        $withargs{zstd_lib}=$1;
+                        }
+                elsif (/^--with-zstd-include=(.*)$/)
+                        {
+                        $withargs{zstd_include}=$1;
+                        }
                 elsif (/^--with-fuzzer-lib=(.*)$/)
                         {
                         $withargs{fuzzer_lib}=$1;