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|
#!/usr/bin/perl
# Generate error.c
#
# Usage: ./generate_errors.pl or scripts/generate_errors.pl without arguments,
# or generate_errors.pl include_dir data_dir error_file
use strict;
my ($include_dir, $data_dir, $error_file);
if( @ARGV ) {
die "Invalid number of arguments" if scalar @ARGV != 3;
($include_dir, $data_dir, $error_file) = @ARGV;
-d $include_dir or die "No such directory: $include_dir\n";
-d $data_dir or die "No such directory: $data_dir\n";
} else {
$include_dir = 'include/mbedtls';
$data_dir = 'scripts/data_files';
$error_file = 'library/error.c';
unless( -d $include_dir && -d $data_dir ) {
chdir '..' or die;
-d $include_dir && -d $data_dir
or die "Without arguments, must be run from root or scripts\n"
}
}
my $error_format_file = $data_dir.'/error.fmt';
my @low_level_modules = ( "AES", "ASN1", "BLOWFISH", "CAMELLIA", "BIGNUM",
"BASE64", "XTEA", "PBKDF2", "OID",
"PADLOCK", "DES", "NET", "CTR_DRBG", "ENTROPY",
"HMAC_DRBG", "MD2", "MD4", "MD5", "RIPEMD160",
"SHA1", "SHA256", "SHA512", "GCM", "THREADING", "CCM" );
my @high_level_modules = ( "PEM", "X509", "DHM", "RSA", "ECP", "MD", "CIPHER", "SSL",
"PK", "PKCS12", "PKCS5" );
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, "grep \"define MBEDTLS_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 = "";
my %error_codes_seen;
while (my $line = <GREP>)
{
next if ($line =~ /compat-1.2.h/);
my ($error_name, $error_code) = $line =~ /(MBEDTLS_ERR_\w+)\s+\-(0x\w+)/;
my ($description) = $line =~ /\/\*\*< (.*?)\.? \*\//;
die "Duplicated error code: $error_code ($error_name)\n"
if( $error_codes_seen{$error_code}++ );
$description =~ s/\\/\\\\/g;
if ($description eq "") {
$description = "DESCRIPTION MISSING";
warn "Missing description for $error_name\n";
}
my ($module_name) = $error_name =~ /^MBEDTLS_ERR_([^_]+)/;
# Fix faulty ones
$module_name = "BIGNUM" if ($module_name eq "MPI");
$module_name = "CTR_DRBG" if ($module_name eq "CTR");
$module_name = "HMAC_DRBG" if ($module_name eq "HMAC");
my $define_name = $module_name;
$define_name = "X509_USE,X509_CREATE" if ($define_name eq "X509");
$define_name = "ASN1_PARSE" if ($define_name eq "ASN1");
$define_name = "SSL_TLS" if ($define_name eq "SSL");
$define_name = "PEM_PARSE,PEM_WRITE" if ($define_name eq "PEM");
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;
my $first;
if ($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 /* ";
$first = 0;
foreach my $dep (split(/,/, ${$old_define}))
{
${$code_check} .= " || " if ($first++);
${$code_check} .= "MBEDTLS_${dep}_C";
}
${$code_check} .= " */\n\n";
}
${$code_check} .= "#if ";
$headers .= "#if " if ($include_name ne "");
$first = 0;
foreach my $dep (split(/,/, ${define_name}))
{
${$code_check} .= " || " if ($first);
$headers .= " || " if ($first++);
${$code_check} .= "defined(MBEDTLS_${dep}_C)";
$headers .= "defined(MBEDTLS_${dep}_C)" if
($include_name ne "");
}
${$code_check} .= "\n";
$headers .= "\n#include \"mbedtls/${include_name}.h\"\n".
"#endif\n\n" if ($include_name ne "");
${$old_define} = $define_name;
}
if ($error_name eq "MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE")
{
${$code_check} .= "${white_space}if( use_ret == -($error_name) )\n".
"${white_space}\{\n".
"${white_space} mbedtls_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".
"${white_space} mbedtls_snprintf( buf, buflen, \"$module_name - $description\" );\n"
}
};
if ($ll_old_define ne "")
{
$ll_code_check .= "#endif /* ";
my $first = 0;
foreach my $dep (split(/,/, $ll_old_define))
{
$ll_code_check .= " || " if ($first++);
$ll_code_check .= "MBEDTLS_${dep}_C";
}
$ll_code_check .= " */\n";
}
if ($hl_old_define ne "")
{
$hl_code_check .= "#endif /* ";
my $first = 0;
foreach my $dep (split(/,/, $hl_old_define))
{
$hl_code_check .= " || " if ($first++);
$hl_code_check .= "MBEDTLS_${dep}_C";
}
$hl_code_check .= " */\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);
|
