Set meaningful test configuration names when running tests

Set MBEDTLS_TEST_PLATFORM and MBEDTLS_TEST_CONFIGURATION to meaningful
values in all.sh. These environment variables are used when
writing an outcome file, which happens if MBEDTLS_TEST_OUTCOME_FILE is
also set.

When running one of the try-multiple-configuration scripts, set
MBEDTLS_TEST_CONFIGURATION to a value that uniquely describes the
configuration.

tests/scripts/all.sh

@@ -121,6 +121,9 @@ pre_initialize_variables () {
     FORCE=0
     KEEP_GOING=0
 
+    : ${MBEDTLS_TEST_PLATFORM="$(uname -s | tr -c \\n0-9A-Za-z _)-$(uname -m | tr -c \\n0-9A-Za-z _)"}
+    export MBEDTLS_TEST_PLATFORM
+
     # Default commands, can be overridden by the environment
     : ${OPENSSL:="openssl"}
     : ${OPENSSL_LEGACY:="$OPENSSL"}
@@ -1424,6 +1427,7 @@ run_component () {
     # The cleanup function will restore it.
     cp -p "$CONFIG_H" "$CONFIG_BAK"
     current_component="$1"
+    export MBEDTLS_TEST_CONFIGURATION="$current_component"
     "$@"
     cleanup
 }

tests/scripts/curves.pl

@@ -51,6 +51,7 @@ for my $curve (@curves) {
     print "\n******************************************\n";
     print "* Testing without curve: $curve\n";
     print "******************************************\n";
+    $ENV{MBEDTLS_TEST_CONFIGURATION} = "-$curve";
 
     system( "scripts/config.pl unset $curve" )
         and abort "Failed to disable $curve\n";

tests/scripts/depends-hashes.pl

@@ -57,6 +57,7 @@ for my $hash (@hashes) {
     print "\n******************************************\n";
     print "* Testing without hash: $hash\n";
     print "******************************************\n";
+    $ENV{MBEDTLS_TEST_CONFIGURATION} = "-$hash";
 
     system( "scripts/config.pl unset $hash" )
         and abort "Failed to disable $hash\n";

tests/scripts/depends-pkalgs.pl

@@ -72,6 +72,7 @@ while( my ($alg, $extras) = each %algs ) {
     print "\n******************************************\n";
     print "* Testing without alg: $alg\n";
     print "******************************************\n";
+    $ENV{MBEDTLS_TEST_CONFIGURATION} = "-$alg";
 
     system( "scripts/config.pl unset $alg" )
         and abort "Failed to disable $alg\n";

tests/scripts/key-exchanges.pl

@@ -45,6 +45,7 @@ for my $kex (@kexes) {
     print "\n******************************************\n";
     print "* Testing with key exchange: $kex\n";
     print "******************************************\n";
+    $ENV{MBEDTLS_TEST_CONFIGURATION} = "-$kex";
 
     # full config with all key exchanges disabled except one
     system( "scripts/config.pl full" ) and abort "Failed config full\n";

tests/scripts/test-ref-configs.pl

@@ -65,6 +65,7 @@ while( my ($conf, $data) = each %configs ) {
     print "\n******************************************\n";
     print "* Testing configuration: $conf\n";
     print "******************************************\n";
+    $ENV{MBEDTLS_TEST_CONFIGURATION} = "$conf";
 
     system( "cp configs/$conf $config_h" )
         and abort "Failed to activate $conf\n";