mbedtls/scripts/generate_errors.pl

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Perl
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#!/usr/bin/perl
#
use strict;
my $include_dir = shift or die "Missing include directory";
my $data_dir = shift or die "Missing data directory";
my $error_file = shift or die "Missing destination file";
my $error_format_file = $data_dir.'/error.fmt';
my @low_level_modules = ( "AES", "ASN1", "BLOWFISH", "CAMELLIA", "BIGNUM",
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"BASE64", "XTEA", "PBKDF2",
"PADLOCK", "DES", "NET", "CTR_DRBG", "ENTROPY",
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"MD2", "MD4", "MD5", "SHA1", "SHA2", "SHA4", "GCM" );
my @high_level_modules = ( "PEM", "X509", "DHM", "RSA", "MD", "CIPHER", "SSL" );
my $line_separator = $/;
undef $/;
open(FORMAT_FILE, "$error_format_file") or die "Opening error format file '$error_format_file': $!";
my $error_format = <FORMAT_FILE>;
close(FORMAT_FILE);
$/ = $line_separator;
open(GREP, "/bin/grep \"define POLARSSL_ERR_\" $include_dir/* |") || die("Failure when calling grep: $!");
my $ll_old_define = "";
my $hl_old_define = "";
my $ll_code_check = "";
my $hl_code_check = "";
my $headers = "";
while (my $line = <GREP>)
{
my ($error_name, $error_code) = $line =~ /(POLARSSL_ERR_\w+)\s+\-(0x\w+)/;
my ($description) = $line =~ /\/\*\*< (.*?)\.? \*\//;
$description =~ s/\\/\\\\/g;
$description = "DESCRIPTION MISSING" if ($description eq "");
my ($module_name) = $error_name =~ /^POLARSSL_ERR_([^_]+)/;
# Fix faulty ones
$module_name = "BIGNUM" if ($module_name eq "MPI");
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$module_name = "CTR_DRBG" if ($module_name eq "CTR");
my $define_name = $module_name;
$define_name = "X509_PARSE" if ($define_name eq "X509");
$define_name = "ASN1_PARSE" if ($define_name eq "ASN1");
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$define_name = "SSL_TLS" if ($define_name eq "SSL");
my $include_name = $module_name;
$include_name =~ tr/A-Z/a-z/;
$include_name = "" if ($include_name eq "asn1");
my $found_ll = grep $_ eq $module_name, @low_level_modules;
my $found_hl = grep $_ eq $module_name, @high_level_modules;
if (!$found_ll && !$found_hl)
{
printf("Error: Do not know how to handle: $module_name\n");
exit 1;
}
my $code_check;
my $old_define;
my $white_space;
if ($found_ll)
{
$code_check = \$ll_code_check;
$old_define = \$ll_old_define;
$white_space = ' ';
}
else
{
$code_check = \$hl_code_check;
$old_define = \$hl_old_define;
$white_space = ' ';
}
if ($define_name ne ${$old_define})
{
if (${$old_define} ne "")
{
${$code_check} .= "#endif /* POLARSSL_${$old_define}_C */\n\n";
}
${$code_check} .= "#if defined(POLARSSL_${define_name}_C)\n";
$headers .= "#if defined(POLARSSL_${define_name}_C)\n".
"#include \"polarssl/${include_name}.h\"\n".
"#endif\n\n" if ($include_name ne "");
${$old_define} = $define_name;
}
if ($error_name eq "POLARSSL_ERR_SSL_FATAL_ALERT_MESSAGE")
{
${$code_check} .= "${white_space}if( use_ret == -($error_name) )\n".
"${white_space}\{\n".
"${white_space} snprintf( buf, buflen, \"$module_name - $description\" );\n".
"${white_space} return;\n".
"${white_space}}\n"
}
else
{
${$code_check} .= "${white_space}if( use_ret == -($error_name) )\n".
"${white_space} snprintf( buf, buflen, \"$module_name - $description\" );\n"
}
};
if ($ll_old_define ne "")
{
$ll_code_check .= "#endif /* POLARSSL_${ll_old_define}_C */\n\n";
}
if ($hl_old_define ne "")
{
$hl_code_check .= "#endif /* POLARSSL_${hl_old_define}_C */\n\n";
}
$error_format =~ s/HEADER_INCLUDED\n/$headers/g;
$error_format =~ s/LOW_LEVEL_CODE_CHECKS\n/$ll_code_check/g;
$error_format =~ s/HIGH_LEVEL_CODE_CHECKS\n/$hl_code_check/g;
open(ERROR_FILE, ">$error_file") or die "Opening destination file '$error_file': $!";
print ERROR_FILE $error_format;
close(ERROR_FILE);