Squashed 'lib/mbedtls/external/mbedtls/' content from commit 2ca6c285a0dd

git-subtree-dir: lib/mbedtls/external/mbedtls
git-subtree-split: 2ca6c285a0dd3f33982dd57299012dacab1ff206

1 files changed, 116 insertions, 0 deletions

diff --git a/scripts/generate_query_config.pl b/scripts/generate_query_config.pl
new file mode 100755
index 00000000000..39743da6d17
--- /dev/null
+++ b/scripts/generate_query_config.pl
@@ -0,0 +1,116 @@
+#! /usr/bin/env perl
+
+# Generate query_config.c
+#
+# The file query_config.c contains a C function that can be used to check if
+# a configuration macro is defined and to retrieve its expansion in string
+# form (if any). This facilitates querying the compile time configuration of
+# the library, for example, for testing.
+#
+# The query_config.c is generated from the default configuration files
+# include/mbedtls/mbedtls_config.h and include/psa/crypto_config.h.
+# The idea is that mbedtls_config.h and crypto_config.h contain ALL the
+# compile time configurations available in Mbed TLS (commented or uncommented).
+# This script extracts the configuration macros from the two files and this
+# information is used to automatically generate the body of the query_config()
+# function by using the template in scripts/data_files/query_config.fmt.
+#
+# Usage: scripts/generate_query_config.pl without arguments, or
+# generate_query_config.pl mbedtls_config_file psa_crypto_config_file template_file output_file
+#
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+
+use strict;
+
+my ($mbedtls_config_file, $psa_crypto_config_file, $query_config_format_file, $query_config_file);
+
+my $default_mbedtls_config_file = "./include/mbedtls/mbedtls_config.h";
+my $default_psa_crypto_config_file = "./include/psa/crypto_config.h";
+my $default_query_config_format_file = "./scripts/data_files/query_config.fmt";
+my $default_query_config_file = "./programs/test/query_config.c";
+
+if( @ARGV ) {
+    die "Invalid number of arguments - usage: $0 [MBED_TLS_CONFIG_FILE PSA_CRYPTO_CONFIG_FILE TEMPLATE_FILE OUTPUT_FILE]" if scalar @ARGV != 4;
+    ($mbedtls_config_file, $psa_crypto_config_file, $query_config_format_file, $query_config_file) = @ARGV;
+
+    -f $mbedtls_config_file or die "No such file: $mbedtls_config_file";
+    -f $psa_crypto_config_file or die "No such file: $psa_crypto_config_file";
+    -f $query_config_format_file or die "No such file: $query_config_format_file";
+} else {
+    $mbedtls_config_file = $default_mbedtls_config_file;
+    $psa_crypto_config_file = $default_psa_crypto_config_file;
+    $query_config_format_file = $default_query_config_format_file;
+    $query_config_file = $default_query_config_file;
+
+    unless(-f $mbedtls_config_file && -f $query_config_format_file  && -f $psa_crypto_config_file) {
+        chdir '..' or die;
+        -f $mbedtls_config_file && -f $query_config_format_file && -f $psa_crypto_config_file
+          or die "No arguments supplied, must be run from project root or a first-level subdirectory\n";
+    }
+}
+
+# Excluded macros from the generated query_config.c. For example, macros that
+# have commas or function-like macros cannot be transformed into strings easily
+# using the preprocessor, so they should be excluded or the preprocessor will
+# throw errors.
+my @excluded = qw(
+MBEDTLS_SSL_CIPHERSUITES
+);
+my $excluded_re = join '|', @excluded;
+
+# This variable will contain the string to replace in the CHECK_CONFIG of the
+# format file
+my $config_check = "";
+my $list_config = "";
+
+for my $config_file ($mbedtls_config_file, $psa_crypto_config_file) {
+
+    next unless defined($config_file);  # we might not have been given a PSA crypto config file
+
+    open(CONFIG_FILE, "<", $config_file) or die "Opening config file '$config_file': $!";
+
+    while (my $line = <CONFIG_FILE>) {
+        if ($line =~ /^(\/\/)?\s*#\s*define\s+(MBEDTLS_\w+|PSA_WANT_\w+).*/) {
+            my $name = $2;
+
+            # Skip over the macro if it is in the excluded list
+            next if $name =~ /$excluded_re/;
+
+            $config_check .= <<EOT;
+#if defined($name)
+    if( strcmp( "$name", config ) == 0 )
+    {
+        MACRO_EXPANSION_TO_STR( $name );
+        return( 0 );
+    }
+#endif /* $name */
+
+EOT
+
+            $list_config .= <<EOT;
+#if defined($name)
+    OUTPUT_MACRO_NAME_VALUE($name);
+#endif /* $name */
+
+EOT
+        }
+    }
+
+    close(CONFIG_FILE);
+}
+
+# Read the full format file into a string
+local $/;
+open(FORMAT_FILE, "<", $query_config_format_file) or die "Opening query config format file '$query_config_format_file': $!";
+my $query_config_format = <FORMAT_FILE>;
+close(FORMAT_FILE);
+
+# Replace the body of the query_config() function with the code we just wrote
+$query_config_format =~ s/CHECK_CONFIG/$config_check/g;
+$query_config_format =~ s/LIST_CONFIG/$list_config/g;
+
+# Rewrite the query_config.c file
+open(QUERY_CONFIG_FILE, ">", $query_config_file) or die "Opening destination file '$query_config_file': $!";
+print QUERY_CONFIG_FILE $query_config_format;
+close(QUERY_CONFIG_FILE);