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|
#!/usr/bin/env perl
# Generate error.c
#
# Usage: ./generate_errors.pl or scripts/generate_errors.pl without arguments,
# or generate_errors.pl crypto_include_dir tls_include_dir data_dir error_file
#
# Copyright The Mbed TLS Contributors
# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
use strict;
use warnings;
my ($crypto_include_dir, $tls_include_dir, $data_dir, $error_file);
if( @ARGV ) {
die "Invalid number of arguments" if scalar @ARGV != 4;
($crypto_include_dir, $tls_include_dir, $data_dir, $error_file) = @ARGV;
-d $crypto_include_dir or die "No such directory: $crypto_include_dir\n";
-d $tls_include_dir or die "No such directory: $tls_include_dir\n";
-d $data_dir or die "No such directory: $data_dir\n";
} else {
$crypto_include_dir = 'tf-psa-crypto/drivers/builtin/include/mbedtls';
$tls_include_dir = 'include/mbedtls';
$data_dir = 'scripts/data_files';
$error_file = 'tf-psa-crypto/drivers/builtin/src/error.c';
unless( -d $crypto_include_dir && -d $tls_include_dir && -d $data_dir ) {
chdir '..' or die;
-d $crypto_include_dir && -d $tls_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 = qw( AES ARIA ASN1 BASE64 BIGNUM
CAMELLIA CCM CHACHA20 CHACHAPOLY CMAC CTR_DRBG DES
ENTROPY ERROR GCM HKDF HMAC_DRBG LMS MD5
NET OID PBKDF2 PLATFORM POLY1305 RIPEMD160
SHA1 SHA256 SHA512 SHA3 THREADING );
my @high_level_modules = qw( CIPHER DHM ECP MD
PEM PK PKCS12 PKCS5
RSA SSL X509 PKCS7 );
undef $/;
open(FORMAT_FILE, '<:crlf', "$error_format_file") or die "Opening error format file '$error_format_file': $!";
my $error_format = <FORMAT_FILE>;
close(FORMAT_FILE);
my @files = glob qq("$crypto_include_dir/*.h");
push(@files, glob qq("$tls_include_dir/*.h"));
my @necessary_include_files;
my @matches;
foreach my $file (@files) {
open(FILE, '<:crlf', $file) or die("$0: $file: $!");
my $content = <FILE>;
close FILE;
my $found = 0;
while ($content =~ m[
# Both the before-comment and the after-comment are optional.
# Only the comment content is a regex capture group. The comment
# start and end parts are outside the capture group.
(?:/\*[*!](?!<) # Doxygen before-comment start
((?:[^*]|\*+[^*/])*) # $1: Comment content (no */ inside)
\*/)? # Comment end
\s*\#\s*define\s+(MBEDTLS_ERR_\w+) # $2: name
\s+\-(0[Xx][0-9A-Fa-f]+)\s* # $3: value (without the sign)
(?:/\*[*!]< # Doxygen after-comment start
((?:[^*]|\*+[^*/])*) # $4: Comment content (no */ inside)
\*/)? # Comment end
]gsx) {
my ($before, $name, $value, $after) = ($1, $2, $3, $4);
# Discard Doxygen comments that are coincidentally present before
# an error definition but not attached to it. This is ad hoc, based
# on what actually matters (or mattered at some point).
undef $before if defined($before) && $before =~ /\s*\\name\s/s;
die "Description neither before nor after $name in $file\n"
if !defined($before) && !defined($after);
die "Description both before and after $name in $file\n"
if defined($before) && defined($after);
my $description = (defined($before) ? $before : $after);
$description =~ s/^\s+//;
$description =~ s/\n( *\*)? */ /g;
$description =~ s/\.?\s+$//;
push @matches, [$name, $value, $description];
++$found;
}
if ($found) {
my $include_name = $file;
$include_name =~ s!.*/!!;
push @necessary_include_files, $include_name;
}
}
my $ll_old_define = "";
my $hl_old_define = "";
my $ll_code_check = "";
my $hl_code_check = "";
my $headers = "";
my %included_headers;
my %error_codes_seen;
foreach my $match (@matches)
{
my ($error_name, $error_code, $description) = @$match;
die "Duplicated error code: $error_code ($error_name)\n"
if( $error_codes_seen{$error_code}++ );
$description =~ s/\\/\\\\/g;
my ($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");
$define_name = "PKCS7" if ($define_name eq "PKCS7");
my $include_name = $module_name;
$include_name =~ tr/A-Z/a-z/;
# Fix faulty ones
$include_name = "net_sockets" if ($module_name eq "NET");
$included_headers{"${include_name}.h"} = $module_name;
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;
}
${$code_check} .= "${white_space}case -($error_name):\n".
"${white_space} return( \"$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);
my $errors = 0;
for my $include_name (@necessary_include_files)
{
if (not $included_headers{$include_name})
{
print STDERR "The header file \"$include_name\" defines error codes but has not been included!\n";
++$errors;
}
}
exit !!$errors;
|
