diff options
Diffstat (limited to 'scripts/x509keyid')
| -rwxr-xr-x | scripts/x509keyid | 268 | 
1 files changed, 0 insertions, 268 deletions
diff --git a/scripts/x509keyid b/scripts/x509keyid deleted file mode 100755 index c8e91a4af38..00000000000 --- a/scripts/x509keyid +++ /dev/null @@ -1,268 +0,0 @@ -#!/usr/bin/perl -w -# -# Generate an identifier from an X.509 certificate that can be placed in a -# module signature to indentify the key to use. -# -# Format: -# -#	./scripts/x509keyid <x509-cert> <signer's-name> <key-id> -# -# We read the DER-encoded X509 certificate and parse it to extract the Subject -# name and Subject Key Identifier.  The provide the data we need to build the -# certificate identifier. -# -# The signer's name part of the identifier is fabricated from the commonName, -# the organizationName or the emailAddress components of the X.509 subject -# name and written to the second named file. -# -# The subject key ID to select which of that signer's certificates we're -# intending to use to sign the module is written to the third named file. -# -use strict; - -my $raw_data; - -die "Need three filenames\n" if ($#ARGV != 2); - -my $src = $ARGV[0]; - -open(FD, "<$src") || die $src; -binmode FD; -my @st = stat(FD); -die $src if (!@st); -read(FD, $raw_data, $st[7]) || die $src; -close(FD); - -my $UNIV = 0 << 6; -my $APPL = 1 << 6; -my $CONT = 2 << 6; -my $PRIV = 3 << 6; - -my $CONS = 0x20; - -my $BOOLEAN	= 0x01; -my $INTEGER	= 0x02; -my $BIT_STRING	= 0x03; -my $OCTET_STRING = 0x04; -my $NULL	= 0x05; -my $OBJ_ID	= 0x06; -my $UTF8String	= 0x0c; -my $SEQUENCE	= 0x10; -my $SET		= 0x11; -my $UTCTime	= 0x17; -my $GeneralizedTime = 0x18; - -my %OIDs = ( -    pack("CCC", 85, 4, 3)	=> "commonName", -    pack("CCC", 85, 4, 6)	=> "countryName", -    pack("CCC", 85, 4, 10)	=> "organizationName", -    pack("CCC", 85, 4, 11)	=> "organizationUnitName", -    pack("CCCCCCCCC", 42, 134, 72, 134, 247, 13, 1, 1, 1) => "rsaEncryption", -    pack("CCCCCCCCC", 42, 134, 72, 134, 247, 13, 1, 1, 5) => "sha1WithRSAEncryption", -    pack("CCCCCCCCC", 42, 134, 72, 134, 247, 13, 1, 9, 1) => "emailAddress", -    pack("CCC", 85, 29, 35)	=> "authorityKeyIdentifier", -    pack("CCC", 85, 29, 14)	=> "subjectKeyIdentifier", -    pack("CCC", 85, 29, 19)	=> "basicConstraints" -); - -############################################################################### -# -# Extract an ASN.1 element from a string and return information about it. -# -############################################################################### -sub asn1_extract($$@) -{ -    my ($cursor, $expected_tag, $optional) = @_; - -    return [ -1 ] -	if ($cursor->[1] == 0 && $optional); - -    die $src, ": ", $cursor->[0], ": ASN.1 data underrun (elem ", $cursor->[1], ")\n" -	if ($cursor->[1] < 2); - -    my ($tag, $len) = unpack("CC", substr(${$cursor->[2]}, $cursor->[0], 2)); - -    if ($expected_tag != -1 && $tag != $expected_tag) { -	return [ -1 ] -	    if ($optional); -	die $src, ": ", $cursor->[0], ": ASN.1 unexpected tag (", $tag, -	" not ", $expected_tag, ")\n"; -    } - -    $cursor->[0] += 2; -    $cursor->[1] -= 2; - -    die $src, ": ", $cursor->[0], ": ASN.1 long tag\n" -	if (($tag & 0x1f) == 0x1f); -    die $src, ": ", $cursor->[0], ": ASN.1 indefinite length\n" -	if ($len == 0x80); - -    if ($len > 0x80) { -	my $l = $len - 0x80; -	die $src, ": ", $cursor->[0], ": ASN.1 data underrun (len len $l)\n" -	    if ($cursor->[1] < $l); - -	if ($l == 0x1) { -	    $len = unpack("C", substr(${$cursor->[2]}, $cursor->[0], 1)); -	} elsif ($l = 0x2) { -	    $len = unpack("n", substr(${$cursor->[2]}, $cursor->[0], 2)); -	} elsif ($l = 0x3) { -	    $len = unpack("C", substr(${$cursor->[2]}, $cursor->[0], 1)) << 16; -	    $len = unpack("n", substr(${$cursor->[2]}, $cursor->[0] + 1, 2)); -	} elsif ($l = 0x4) { -	    $len = unpack("N", substr(${$cursor->[2]}, $cursor->[0], 4)); -	} else { -	    die $src, ": ", $cursor->[0], ": ASN.1 element too long (", $l, ")\n"; -	} - -	$cursor->[0] += $l; -	$cursor->[1] -= $l; -    } - -    die $src, ": ", $cursor->[0], ": ASN.1 data underrun (", $len, ")\n" -	if ($cursor->[1] < $len); - -    my $ret = [ $tag, [ $cursor->[0], $len, $cursor->[2] ] ]; -    $cursor->[0] += $len; -    $cursor->[1] -= $len; - -    return $ret; -} - -############################################################################### -# -# Retrieve the data referred to by a cursor -# -############################################################################### -sub asn1_retrieve($) -{ -    my ($cursor) = @_; -    my ($offset, $len, $data) = @$cursor; -    return substr($$data, $offset, $len); -} - -############################################################################### -# -# Roughly parse the X.509 certificate -# -############################################################################### -my $cursor = [ 0, length($raw_data), \$raw_data ]; - -my $cert = asn1_extract($cursor, $UNIV | $CONS | $SEQUENCE); -my $tbs = asn1_extract($cert->[1], $UNIV | $CONS | $SEQUENCE); -my $version = asn1_extract($tbs->[1], $CONT | $CONS | 0, 1); -my $serial_number = asn1_extract($tbs->[1], $UNIV | $INTEGER); -my $sig_type = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE); -my $issuer = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE); -my $validity = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE); -my $subject = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE); -my $key = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE); -my $issuer_uid = asn1_extract($tbs->[1], $CONT | $CONS | 1, 1); -my $subject_uid = asn1_extract($tbs->[1], $CONT | $CONS | 2, 1); -my $extension_list = asn1_extract($tbs->[1], $CONT | $CONS | 3, 1); - -my $subject_key_id = (); -my $authority_key_id = (); - -# -# Parse the extension list -# -if ($extension_list->[0] != -1) { -    my $extensions = asn1_extract($extension_list->[1], $UNIV | $CONS | $SEQUENCE); - -    while ($extensions->[1]->[1] > 0) { -	my $ext = asn1_extract($extensions->[1], $UNIV | $CONS | $SEQUENCE); -	my $x_oid = asn1_extract($ext->[1], $UNIV | $OBJ_ID); -	my $x_crit = asn1_extract($ext->[1], $UNIV | $BOOLEAN, 1); -	my $x_val = asn1_extract($ext->[1], $UNIV | $OCTET_STRING); - -	my $raw_oid = asn1_retrieve($x_oid->[1]); -	next if (!exists($OIDs{$raw_oid})); -	my $x_type = $OIDs{$raw_oid}; - -	my $raw_value = asn1_retrieve($x_val->[1]); - -	if ($x_type eq "subjectKeyIdentifier") { -	    my $vcursor = [ 0, length($raw_value), \$raw_value ]; - -	    $subject_key_id = asn1_extract($vcursor, $UNIV | $OCTET_STRING); -	} -    } -} - -############################################################################### -# -# Determine what we're going to use as the signer's name.  In order of -# preference, take one of: commonName, organizationName or emailAddress. -# -############################################################################### -my $org = ""; -my $cn = ""; -my $email = ""; - -while ($subject->[1]->[1] > 0) { -    my $rdn = asn1_extract($subject->[1], $UNIV | $CONS | $SET); -    my $attr = asn1_extract($rdn->[1], $UNIV | $CONS | $SEQUENCE); -    my $n_oid = asn1_extract($attr->[1], $UNIV | $OBJ_ID); -    my $n_val = asn1_extract($attr->[1], -1); - -    my $raw_oid = asn1_retrieve($n_oid->[1]); -    next if (!exists($OIDs{$raw_oid})); -    my $n_type = $OIDs{$raw_oid}; - -    my $raw_value = asn1_retrieve($n_val->[1]); - -    if ($n_type eq "organizationName") { -	$org = $raw_value; -    } elsif ($n_type eq "commonName") { -	$cn = $raw_value; -    } elsif ($n_type eq "emailAddress") { -	$email = $raw_value; -    } -} - -my $id_name = $email; - -if ($org && $cn) { -    # Don't use the organizationName if the commonName repeats it -    if (length($org) <= length($cn) && -	substr($cn, 0, length($org)) eq $org) { -	$id_name = $cn; -	goto got_id_name; -    } - -    # Or a signifcant chunk of it -    if (length($org) >= 7 && -	length($cn) >= 7 && -	substr($cn, 0, 7) eq substr($org, 0, 7)) { -	$id_name = $cn; -	goto got_id_name; -    } - -    $id_name = $org . ": " . $cn; -} elsif ($org) { -    $id_name = $org; -} elsif ($cn) { -    $id_name = $cn; -} - -got_id_name: - -############################################################################### -# -# Output the signer's name and the key identifier that we're going to include -# in module signatures. -# -############################################################################### -die $src, ": ", "X.509: Couldn't find the Subject Key Identifier extension\n" -    if (!$subject_key_id); - -my $id_key_id = asn1_retrieve($subject_key_id->[1]); - -open(OUTFD, ">$ARGV[1]") || die $ARGV[1]; -print OUTFD $id_name; -close OUTFD || die $ARGV[1]; - -open(OUTFD, ">$ARGV[2]") || die $ARGV[2]; -print OUTFD $id_key_id; -close OUTFD || die $ARGV[2];  |