Accepting request 521694 from home:joeyli:branches:Base:System
Add sign-file.c to support PKCS#7 kernel module signing (bsc#1049122) OBS-URL: https://build.opensuse.org/request/show/521694 OBS-URL: https://build.opensuse.org/package/show/Base:System/pesign-obs-integration?expand=0&rev=47
This commit is contained in:
Gary Ching-Pang Lin
Git OBS Bridge
parent
71d38ee384
commit
cf2c1c7eed
445
kernel-sign-file
445
kernel-sign-file
@ -1,445 +0,0 @@
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#!/usr/bin/perl -w
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#
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# Sign a module file using the given key.
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#
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my $USAGE =
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"Usage: scripts/sign-file [-v] <hash algo> <key> <x509> <module> [<dest>]\n" .
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" scripts/sign-file [-v] -s <raw sig> <hash algo> <x509> <module> [<dest>]\n";
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use strict;
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use FileHandle;
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use IPC::Open2;
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use Getopt::Std;
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my %opts;
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getopts('vs:', \%opts) or die $USAGE;
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my $verbose = $opts{'v'};
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my $signature_file = $opts{'s'};
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die $USAGE if ($#ARGV > 4);
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die $USAGE if (!$signature_file && $#ARGV < 3 || $signature_file && $#ARGV < 2);
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my $dgst = shift @ARGV;
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my $private_key;
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if (!$signature_file) {
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$private_key = shift @ARGV;
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}
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my $x509 = shift @ARGV;
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my $module = shift @ARGV;
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my ($dest, $keep_orig);
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if (@ARGV) {
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$dest = $ARGV[0];
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$keep_orig = 1;
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} else {
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$dest = $module . "~";
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}
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die "Can't read private key\n" if (!$signature_file && !-r $private_key);
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die "Can't read signature file\n" if ($signature_file && !-r $signature_file);
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die "Can't read X.509 certificate\n" unless (-r $x509);
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die "Can't read module\n" unless (-r $module);
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#
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# Function to read the contents of a file into a variable.
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#
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sub read_file($)
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{
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my ($file) = @_;
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my $contents;
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my $len;
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open(FD, "<$file") || die $file;
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binmode FD;
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my @st = stat(FD);
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die $file if (!@st);
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$len = read(FD, $contents, $st[7]) || die $file;
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close(FD) || die $file;
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die "$file: Wanted length ", $st[7], ", got ", $len, "\n"
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if ($len != $st[7]);
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return $contents;
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}
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sub openssl_pipe($$) {
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my ($input, $cmd) = @_;
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my ($pid, $res);
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$pid = open2(*read_from, *write_to, $cmd) || die $cmd;
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binmode write_to;
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print write_to $input || die "pipe to $cmd";
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close(write_to) || die "pipe to $cmd";
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binmode read_from;
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read(read_from, $res, 4096) || die "pipe from $cmd";
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close(read_from) || die "pipe from $cmd";
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waitpid($pid, 0) || die;
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die "$cmd died: $?" if ($? >> 8);
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return $res;
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}
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###############################################################################
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#
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# First of all, we have to parse the X.509 certificate to find certain details
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# about it.
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#
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# We read the DER-encoded X509 certificate and parse it to extract the Subject
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# name and Subject Key Identifier. Theis provides the data we need to build
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# the certificate identifier.
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#
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# The signer's name part of the identifier is fabricated from the commonName,
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# the organizationName or the emailAddress components of the X.509 subject
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# name.
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#
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# The subject key ID is used to select which of that signer's certificates
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# we're intending to use to sign the module.
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#
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###############################################################################
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my $x509_certificate = read_file($x509);
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my $UNIV = 0 << 6;
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my $APPL = 1 << 6;
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my $CONT = 2 << 6;
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my $PRIV = 3 << 6;
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my $CONS = 0x20;
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my $BOOLEAN = 0x01;
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my $INTEGER = 0x02;
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my $BIT_STRING = 0x03;
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my $OCTET_STRING = 0x04;
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my $NULL = 0x05;
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my $OBJ_ID = 0x06;
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my $UTF8String = 0x0c;
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my $SEQUENCE = 0x10;
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my $SET = 0x11;
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my $UTCTime = 0x17;
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my $GeneralizedTime = 0x18;
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my %OIDs = (
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pack("CCC", 85, 4, 3) => "commonName",
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pack("CCC", 85, 4, 6) => "countryName",
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pack("CCC", 85, 4, 10) => "organizationName",
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pack("CCC", 85, 4, 11) => "organizationUnitName",
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pack("CCCCCCCCC", 42, 134, 72, 134, 247, 13, 1, 1, 1) => "rsaEncryption",
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pack("CCCCCCCCC", 42, 134, 72, 134, 247, 13, 1, 1, 5) => "sha1WithRSAEncryption",
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pack("CCCCCCCCC", 42, 134, 72, 134, 247, 13, 1, 9, 1) => "emailAddress",
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pack("CCC", 85, 29, 35) => "authorityKeyIdentifier",
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pack("CCC", 85, 29, 14) => "subjectKeyIdentifier",
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pack("CCC", 85, 29, 19) => "basicConstraints"
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);
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###############################################################################
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#
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# Extract an ASN.1 element from a string and return information about it.
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#
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###############################################################################
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sub asn1_extract($$@)
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{
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my ($cursor, $expected_tag, $optional) = @_;
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return [ -1 ]
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if ($cursor->[1] == 0 && $optional);
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die $x509, ": ", $cursor->[0], ": ASN.1 data underrun (elem ", $cursor->[1], ")\n"
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if ($cursor->[1] < 2);
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my ($tag, $len) = unpack("CC", substr(${$cursor->[2]}, $cursor->[0], 2));
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if ($expected_tag != -1 && $tag != $expected_tag) {
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return [ -1 ]
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if ($optional);
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die $x509, ": ", $cursor->[0], ": ASN.1 unexpected tag (", $tag,
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" not ", $expected_tag, ")\n";
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}
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$cursor->[0] += 2;
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$cursor->[1] -= 2;
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die $x509, ": ", $cursor->[0], ": ASN.1 long tag\n"
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if (($tag & 0x1f) == 0x1f);
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die $x509, ": ", $cursor->[0], ": ASN.1 indefinite length\n"
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if ($len == 0x80);
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if ($len > 0x80) {
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my $l = $len - 0x80;
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die $x509, ": ", $cursor->[0], ": ASN.1 data underrun (len len $l)\n"
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if ($cursor->[1] < $l);
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if ($l == 0x1) {
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$len = unpack("C", substr(${$cursor->[2]}, $cursor->[0], 1));
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} elsif ($l == 0x2) {
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$len = unpack("n", substr(${$cursor->[2]}, $cursor->[0], 2));
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} elsif ($l == 0x3) {
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$len = unpack("C", substr(${$cursor->[2]}, $cursor->[0], 1)) << 16;
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$len = unpack("n", substr(${$cursor->[2]}, $cursor->[0] + 1, 2));
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} elsif ($l == 0x4) {
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$len = unpack("N", substr(${$cursor->[2]}, $cursor->[0], 4));
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} else {
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die $x509, ": ", $cursor->[0], ": ASN.1 element too long (", $l, ")\n";
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}
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$cursor->[0] += $l;
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$cursor->[1] -= $l;
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}
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die $x509, ": ", $cursor->[0], ": ASN.1 data underrun (", $len, ")\n"
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if ($cursor->[1] < $len);
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my $ret = [ $tag, [ $cursor->[0], $len, $cursor->[2] ] ];
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$cursor->[0] += $len;
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$cursor->[1] -= $len;
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return $ret;
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}
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###############################################################################
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#
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# Retrieve the data referred to by a cursor
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#
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###############################################################################
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sub asn1_retrieve($)
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{
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my ($cursor) = @_;
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my ($offset, $len, $data) = @$cursor;
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return substr($$data, $offset, $len);
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}
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###############################################################################
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#
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# Roughly parse the X.509 certificate
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#
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###############################################################################
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my $cursor = [ 0, length($x509_certificate), \$x509_certificate ];
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my $cert = asn1_extract($cursor, $UNIV | $CONS | $SEQUENCE);
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my $tbs = asn1_extract($cert->[1], $UNIV | $CONS | $SEQUENCE);
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my $version = asn1_extract($tbs->[1], $CONT | $CONS | 0, 1);
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my $serial_number = asn1_extract($tbs->[1], $UNIV | $INTEGER);
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my $sig_type = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE);
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my $issuer = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE);
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my $validity = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE);
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my $subject = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE);
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my $key = asn1_extract($tbs->[1], $UNIV | $CONS | $SEQUENCE);
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my $issuer_uid = asn1_extract($tbs->[1], $CONT | $CONS | 1, 1);
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my $subject_uid = asn1_extract($tbs->[1], $CONT | $CONS | 2, 1);
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my $extension_list = asn1_extract($tbs->[1], $CONT | $CONS | 3, 1);
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my $subject_key_id = ();
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my $authority_key_id = ();
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#
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# Parse the extension list
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#
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if ($extension_list->[0] != -1) {
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my $extensions = asn1_extract($extension_list->[1], $UNIV | $CONS | $SEQUENCE);
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while ($extensions->[1]->[1] > 0) {
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my $ext = asn1_extract($extensions->[1], $UNIV | $CONS | $SEQUENCE);
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my $x_oid = asn1_extract($ext->[1], $UNIV | $OBJ_ID);
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my $x_crit = asn1_extract($ext->[1], $UNIV | $BOOLEAN, 1);
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my $x_val = asn1_extract($ext->[1], $UNIV | $OCTET_STRING);
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my $raw_oid = asn1_retrieve($x_oid->[1]);
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next if (!exists($OIDs{$raw_oid}));
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my $x_type = $OIDs{$raw_oid};
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my $raw_value = asn1_retrieve($x_val->[1]);
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if ($x_type eq "subjectKeyIdentifier") {
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my $vcursor = [ 0, length($raw_value), \$raw_value ];
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$subject_key_id = asn1_extract($vcursor, $UNIV | $OCTET_STRING);
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}
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}
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}
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###############################################################################
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#
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# Determine what we're going to use as the signer's name. In order of
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# preference, take one of: commonName, organizationName or emailAddress.
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#
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###############################################################################
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my $org = "";
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my $cn = "";
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my $email = "";
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while ($subject->[1]->[1] > 0) {
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my $rdn = asn1_extract($subject->[1], $UNIV | $CONS | $SET);
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my $attr = asn1_extract($rdn->[1], $UNIV | $CONS | $SEQUENCE);
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my $n_oid = asn1_extract($attr->[1], $UNIV | $OBJ_ID);
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my $n_val = asn1_extract($attr->[1], -1);
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my $raw_oid = asn1_retrieve($n_oid->[1]);
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next if (!exists($OIDs{$raw_oid}));
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my $n_type = $OIDs{$raw_oid};
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my $raw_value = asn1_retrieve($n_val->[1]);
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if ($n_type eq "organizationName") {
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$org = $raw_value;
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} elsif ($n_type eq "commonName") {
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$cn = $raw_value;
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} elsif ($n_type eq "emailAddress") {
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$email = $raw_value;
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}
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}
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my $signers_name = $email;
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if ($org && $cn) {
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# Don't use the organizationName if the commonName repeats it
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if (length($org) <= length($cn) &&
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substr($cn, 0, length($org)) eq $org) {
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$signers_name = $cn;
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goto got_id_name;
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}
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# Or a signifcant chunk of it
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if (length($org) >= 7 &&
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length($cn) >= 7 &&
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substr($cn, 0, 7) eq substr($org, 0, 7)) {
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$signers_name = $cn;
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goto got_id_name;
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}
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$signers_name = $org . ": " . $cn;
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} elsif ($org) {
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$signers_name = $org;
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} elsif ($cn) {
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$signers_name = $cn;
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}
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got_id_name:
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die $x509, ": ", "X.509: Couldn't find the Subject Key Identifier extension\n"
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if (!$subject_key_id);
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my $key_identifier = asn1_retrieve($subject_key_id->[1]);
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###############################################################################
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#
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# Create and attach the module signature
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#
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###############################################################################
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#
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# Signature parameters
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#
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my $algo = 1; # Public-key crypto algorithm: RSA
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my $hash = 0; # Digest algorithm
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my $id_type = 1; # Identifier type: X.509
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#
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# Digest the data
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#
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my $prologue;
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if ($dgst eq "sha1") {
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$prologue = pack("C*",
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0x30, 0x21, 0x30, 0x09, 0x06, 0x05,
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0x2B, 0x0E, 0x03, 0x02, 0x1A,
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0x05, 0x00, 0x04, 0x14);
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$hash = 2;
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} elsif ($dgst eq "sha224") {
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$prologue = pack("C*",
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0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09,
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0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04,
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0x05, 0x00, 0x04, 0x1C);
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$hash = 7;
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} elsif ($dgst eq "sha256") {
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$prologue = pack("C*",
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0x30, 0x31, 0x30, 0x0d, 0x06, 0x09,
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0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01,
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0x05, 0x00, 0x04, 0x20);
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$hash = 4;
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} elsif ($dgst eq "sha384") {
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$prologue = pack("C*",
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0x30, 0x41, 0x30, 0x0d, 0x06, 0x09,
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0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02,
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0x05, 0x00, 0x04, 0x30);
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$hash = 5;
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} elsif ($dgst eq "sha512") {
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$prologue = pack("C*",
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0x30, 0x51, 0x30, 0x0d, 0x06, 0x09,
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0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03,
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0x05, 0x00, 0x04, 0x40);
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$hash = 6;
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} else {
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die "Unknown hash algorithm: $dgst\n";
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}
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my $unsigned_module = read_file($module);
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my $magic_number = "~Module signature appended~\n";
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my $magic_len = length($magic_number);
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my $info_len = 12;
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# Truncate existing signarure, if any
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if (substr($unsigned_module, -$magic_len) eq $magic_number) {
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my $info = substr($unsigned_module, -$magic_len - $info_len, $info_len);
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my ($name_len, $key_len, $sig_len) = unpack("xxxCCxxxN", $info);
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my $subtract = $name_len + $key_len + $sig_len + $info_len + $magic_len;
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if ($subtract > length($unsigned_module)) {
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die "$module: Existing signature is malformed\n";
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}
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$unsigned_module = substr($unsigned_module, 0,
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length($unsigned_module) - $subtract);
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}
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my $signature;
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if ($signature_file) {
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$signature = read_file($signature_file);
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} else {
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#
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# Generate the digest and read from openssl's stdout
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#
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my $digest = openssl_pipe($unsigned_module,
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"openssl dgst -$dgst -binary");
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#
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# Generate the binary signature, which will be just the integer that
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# comprises the signature with no metadata attached.
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#
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$signature = openssl_pipe($prologue . $digest,
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"openssl rsautl -sign -inkey $private_key -keyform PEM");
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}
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$signature = pack("n", length($signature)) . $signature,
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#
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# Build the signed binary
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#
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my $info = pack("CCCCCxxxN",
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$algo, $hash, $id_type,
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length($signers_name),
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length($key_identifier),
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length($signature));
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# Make sure that $info_len value used above matches reality
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if (length($info) != $info_len) {
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die "Signature info size changed ($info_len -> @{[length($info)]}";
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}
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if ($verbose) {
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print "Size of unsigned module: ", length($unsigned_module), "\n";
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print "Size of signer's name : ", length($signers_name), "\n";
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print "Size of key identifier : ", length($key_identifier), "\n";
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print "Size of signature : ", length($signature), "\n";
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||||
print "Size of informaton : ", length($info), "\n";
|
||||
print "Size of magic number : ", length($magic_number), "\n";
|
||||
print "Signer's name : '", $signers_name, "'\n";
|
||||
print "Digest : $dgst\n";
|
||||
}
|
||||
|
||||
open(FD, ">$dest") || die $dest;
|
||||
binmode FD;
|
||||
print FD
|
||||
$unsigned_module,
|
||||
$signers_name,
|
||||
$key_identifier,
|
||||
$signature,
|
||||
$info,
|
||||
$magic_number
|
||||
;
|
||||
close FD || die $dest;
|
||||
|
||||
if (!$keep_orig) {
|
||||
rename($dest, $module) || die $module;
|
||||
}
|
||||
@ -119,7 +119,7 @@ set -e
|
||||
echo "Signing kernel modules..."
|
||||
for module in $(find "$buildroot" -type f -name '*.ko' -printf '%P\n'); do
|
||||
if test -n "$key"; then
|
||||
/usr/lib/rpm/pesign/kernel-sign-file \
|
||||
/usr/lib/rpm/pesign/sign-file \
|
||||
sha256 "$key" "$cert" "$buildroot/$module"
|
||||
else
|
||||
raw_sig="$sig_dir/$module.sig"
|
||||
@ -127,7 +127,7 @@ for module in $(find "$buildroot" -type f -name '*.ko' -printf '%P\n'); do
|
||||
echo "$module.sig not found in $sig_dir" >&2
|
||||
exit 1
|
||||
fi
|
||||
/usr/lib/rpm/pesign/kernel-sign-file \
|
||||
/usr/lib/rpm/pesign/sign-file \
|
||||
-s "$raw_sig" sha256 "$cert" "$buildroot/$module"
|
||||
fi
|
||||
|
||||
|
||||
@ -1,3 +1,10 @@
|
||||
-------------------------------------------------------------------
|
||||
Wed Sep 6 02:47:26 UTC 2017 - jlee@suse.com
|
||||
|
||||
- To support PKCS#7 kernel module signing, copy sign-file.c from
|
||||
SLE-15 v4.12 kernel source to replace the kernel-sign-file script
|
||||
to align upstream. (bsc#1049122)
|
||||
|
||||
-------------------------------------------------------------------
|
||||
Tue Nov 29 08:29:36 UTC 2016 - mmarek@suse.cz
|
||||
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
#
|
||||
# spec file for package pesign-obs-integration
|
||||
#
|
||||
# Copyright (c) 2016 SUSE LINUX GmbH, Nuernberg, Germany.
|
||||
# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
|
||||
#
|
||||
# All modifications and additions to the file contributed by third parties
|
||||
# remain the property of their copyright owners, unless otherwise agreed
|
||||
@ -29,6 +29,7 @@ Requires: openssl
|
||||
%ifarch %ix86 x86_64 ia64 aarch64
|
||||
Requires: pesign
|
||||
%endif
|
||||
BuildRequires: libopenssl-devel
|
||||
BuildRequires: openssl
|
||||
Url: http://en.opensuse.org/openSUSE:UEFI_Image_File_Sign_Tools
|
||||
Source2: pesign-repackage.spec.in
|
||||
@ -36,7 +37,7 @@ Source3: pesign-gen-repackage-spec
|
||||
Source4: brp-99-pesign
|
||||
Source5: COPYING
|
||||
Source6: README
|
||||
Source7: kernel-sign-file
|
||||
Source7: sign-file.c
|
||||
Source8: modsign-repackage
|
||||
Source9: gen-hmac
|
||||
Source10: brp-99-compress-vmlinux
|
||||
@ -51,12 +52,13 @@ boot loader, kernel and kernel modules in the openSUSE Buildservice.
|
||||
cp %_sourcedir/{COPYING,README} .
|
||||
|
||||
%build
|
||||
gcc $RPM_OPT_FLAGS %_sourcedir/sign-file.c -o %_sourcedir/sign-file -lcrypto
|
||||
|
||||
%install
|
||||
|
||||
mkdir -p %buildroot/usr/lib/rpm/brp-suse.d %buildroot/usr/lib/rpm/pesign
|
||||
cd %_sourcedir
|
||||
install pesign-gen-repackage-spec kernel-sign-file gen-hmac %buildroot/usr/lib/rpm/pesign
|
||||
install pesign-gen-repackage-spec sign-file gen-hmac %buildroot/usr/lib/rpm/pesign
|
||||
install brp-99-pesign %buildroot/usr/lib/rpm/brp-suse.d
|
||||
# brp-99-compress-vmlinux has nothing to do with signing. It is packaged in
|
||||
# pesign-obs-integration because this package is already used by the kernel
|
||||
|
||||
@ -119,7 +119,7 @@ for sig in "${sigs[@]}"; do
|
||||
f=%buildroot/${sig%.sig}
|
||||
case "/$sig" in
|
||||
*.ko.sig)
|
||||
/usr/lib/rpm/pesign/kernel-sign-file -s "$sig" sha256 "$cert" "$f"
|
||||
/usr/lib/rpm/pesign/sign-file -s "$sig" sha256 "$cert" "$f"
|
||||
;;
|
||||
/boot/* | *.efi.sig)
|
||||
infile=${sig%.sig}
|
||||
|
||||
399
sign-file.c
Normal file
399
sign-file.c
Normal file
@ -0,0 +1,399 @@
|
||||
/* Sign a module file using the given key.
|
||||
*
|
||||
* Copyright © 2014-2016 Red Hat, Inc. All Rights Reserved.
|
||||
* Copyright © 2015 Intel Corporation.
|
||||
* Copyright © 2016 Hewlett Packard Enterprise Development LP
|
||||
*
|
||||
* Authors: David Howells <dhowells@redhat.com>
|
||||
* David Woodhouse <dwmw2@infradead.org>
|
||||
* Juerg Haefliger <juerg.haefliger@hpe.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public License
|
||||
* as published by the Free Software Foundation; either version 2.1
|
||||
* of the licence, or (at your option) any later version.
|
||||
*/
|
||||
#define _GNU_SOURCE
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include <string.h>
|
||||
#include <getopt.h>
|
||||
#include <err.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <openssl/opensslv.h>
|
||||
#include <openssl/bio.h>
|
||||
#include <openssl/evp.h>
|
||||
#include <openssl/pem.h>
|
||||
#include <openssl/err.h>
|
||||
#include <openssl/engine.h>
|
||||
|
||||
/*
|
||||
* Use CMS if we have openssl-1.0.0 or newer available - otherwise we have to
|
||||
* assume that it's not available and its header file is missing and that we
|
||||
* should use PKCS#7 instead. Switching to the older PKCS#7 format restricts
|
||||
* the options we have on specifying the X.509 certificate we want.
|
||||
*
|
||||
* Further, older versions of OpenSSL don't support manually adding signers to
|
||||
* the PKCS#7 message so have to accept that we get a certificate included in
|
||||
* the signature message. Nor do such older versions of OpenSSL support
|
||||
* signing with anything other than SHA1 - so we're stuck with that if such is
|
||||
* the case.
|
||||
*/
|
||||
#if defined(LIBRESSL_VERSION_NUMBER) || \
|
||||
OPENSSL_VERSION_NUMBER < 0x10000000L || \
|
||||
defined(OPENSSL_NO_CMS)
|
||||
#define USE_PKCS7
|
||||
#endif
|
||||
#ifndef USE_PKCS7
|
||||
#include <openssl/cms.h>
|
||||
#else
|
||||
#include <openssl/pkcs7.h>
|
||||
#endif
|
||||
|
||||
struct module_signature {
|
||||
uint8_t algo; /* Public-key crypto algorithm [0] */
|
||||
uint8_t hash; /* Digest algorithm [0] */
|
||||
uint8_t id_type; /* Key identifier type [PKEY_ID_PKCS7] */
|
||||
uint8_t signer_len; /* Length of signer's name [0] */
|
||||
uint8_t key_id_len; /* Length of key identifier [0] */
|
||||
uint8_t __pad[3];
|
||||
uint32_t sig_len; /* Length of signature data */
|
||||
};
|
||||
|
||||
#define PKEY_ID_PKCS7 2
|
||||
|
||||
static char magic_number[] = "~Module signature appended~\n";
|
||||
|
||||
static __attribute__((noreturn))
|
||||
void format(void)
|
||||
{
|
||||
fprintf(stderr,
|
||||
"Usage: scripts/sign-file [-dp] <hash algo> <key> <x509> <module> [<dest>]\n");
|
||||
fprintf(stderr,
|
||||
" scripts/sign-file -s <raw sig> <hash algo> <x509> <module> [<dest>]\n");
|
||||
exit(2);
|
||||
}
|
||||
|
||||
static void display_openssl_errors(int l)
|
||||
{
|
||||
const char *file;
|
||||
char buf[120];
|
||||
int e, line;
|
||||
|
||||
if (ERR_peek_error() == 0)
|
||||
return;
|
||||
fprintf(stderr, "At main.c:%d:\n", l);
|
||||
|
||||
while ((e = ERR_get_error_line(&file, &line))) {
|
||||
ERR_error_string(e, buf);
|
||||
fprintf(stderr, "- SSL %s: %s:%d\n", buf, file, line);
|
||||
}
|
||||
}
|
||||
|
||||
static void drain_openssl_errors(void)
|
||||
{
|
||||
const char *file;
|
||||
int line;
|
||||
|
||||
if (ERR_peek_error() == 0)
|
||||
return;
|
||||
while (ERR_get_error_line(&file, &line)) {}
|
||||
}
|
||||
|
||||
#define ERR(cond, fmt, ...) \
|
||||
do { \
|
||||
bool __cond = (cond); \
|
||||
display_openssl_errors(__LINE__); \
|
||||
if (__cond) { \
|
||||
err(1, fmt, ## __VA_ARGS__); \
|
||||
} \
|
||||
} while(0)
|
||||
|
||||
static const char *key_pass;
|
||||
|
||||
static int pem_pw_cb(char *buf, int len, int w, void *v)
|
||||
{
|
||||
int pwlen;
|
||||
|
||||
if (!key_pass)
|
||||
return -1;
|
||||
|
||||
pwlen = strlen(key_pass);
|
||||
if (pwlen >= len)
|
||||
return -1;
|
||||
|
||||
strcpy(buf, key_pass);
|
||||
|
||||
/* If it's wrong, don't keep trying it. */
|
||||
key_pass = NULL;
|
||||
|
||||
return pwlen;
|
||||
}
|
||||
|
||||
static EVP_PKEY *read_private_key(const char *private_key_name)
|
||||
{
|
||||
EVP_PKEY *private_key;
|
||||
|
||||
if (!strncmp(private_key_name, "pkcs11:", 7)) {
|
||||
ENGINE *e;
|
||||
|
||||
ENGINE_load_builtin_engines();
|
||||
drain_openssl_errors();
|
||||
e = ENGINE_by_id("pkcs11");
|
||||
ERR(!e, "Load PKCS#11 ENGINE");
|
||||
if (ENGINE_init(e))
|
||||
drain_openssl_errors();
|
||||
else
|
||||
ERR(1, "ENGINE_init");
|
||||
if (key_pass)
|
||||
ERR(!ENGINE_ctrl_cmd_string(e, "PIN", key_pass, 0),
|
||||
"Set PKCS#11 PIN");
|
||||
private_key = ENGINE_load_private_key(e, private_key_name,
|
||||
NULL, NULL);
|
||||
ERR(!private_key, "%s", private_key_name);
|
||||
} else {
|
||||
BIO *b;
|
||||
|
||||
b = BIO_new_file(private_key_name, "rb");
|
||||
ERR(!b, "%s", private_key_name);
|
||||
private_key = PEM_read_bio_PrivateKey(b, NULL, pem_pw_cb,
|
||||
NULL);
|
||||
ERR(!private_key, "%s", private_key_name);
|
||||
BIO_free(b);
|
||||
}
|
||||
|
||||
return private_key;
|
||||
}
|
||||
|
||||
static X509 *read_x509(const char *x509_name)
|
||||
{
|
||||
unsigned char buf[2];
|
||||
X509 *x509;
|
||||
BIO *b;
|
||||
int n;
|
||||
|
||||
b = BIO_new_file(x509_name, "rb");
|
||||
ERR(!b, "%s", x509_name);
|
||||
|
||||
/* Look at the first two bytes of the file to determine the encoding */
|
||||
n = BIO_read(b, buf, 2);
|
||||
if (n != 2) {
|
||||
if (BIO_should_retry(b)) {
|
||||
fprintf(stderr, "%s: Read wanted retry\n", x509_name);
|
||||
exit(1);
|
||||
}
|
||||
if (n >= 0) {
|
||||
fprintf(stderr, "%s: Short read\n", x509_name);
|
||||
exit(1);
|
||||
}
|
||||
ERR(1, "%s", x509_name);
|
||||
}
|
||||
|
||||
ERR(BIO_reset(b) != 0, "%s", x509_name);
|
||||
|
||||
if (buf[0] == 0x30 && buf[1] >= 0x81 && buf[1] <= 0x84)
|
||||
/* Assume raw DER encoded X.509 */
|
||||
x509 = d2i_X509_bio(b, NULL);
|
||||
else
|
||||
/* Assume PEM encoded X.509 */
|
||||
x509 = PEM_read_bio_X509(b, NULL, NULL, NULL);
|
||||
|
||||
BIO_free(b);
|
||||
ERR(!x509, "%s", x509_name);
|
||||
|
||||
return x509;
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
struct module_signature sig_info = { .id_type = PKEY_ID_PKCS7 };
|
||||
char *hash_algo = NULL;
|
||||
char *private_key_name = NULL, *raw_sig_name = NULL;
|
||||
char *x509_name, *module_name, *dest_name;
|
||||
bool save_sig = false, replace_orig;
|
||||
bool sign_only = false;
|
||||
bool raw_sig = false;
|
||||
unsigned char buf[4096];
|
||||
unsigned long module_size, sig_size;
|
||||
unsigned int use_signed_attrs;
|
||||
const EVP_MD *digest_algo;
|
||||
EVP_PKEY *private_key;
|
||||
#ifndef USE_PKCS7
|
||||
CMS_ContentInfo *cms = NULL;
|
||||
unsigned int use_keyid = 0;
|
||||
#else
|
||||
PKCS7 *pkcs7 = NULL;
|
||||
#endif
|
||||
X509 *x509;
|
||||
BIO *bd, *bm;
|
||||
int opt, n;
|
||||
OpenSSL_add_all_algorithms();
|
||||
ERR_load_crypto_strings();
|
||||
ERR_clear_error();
|
||||
|
||||
key_pass = getenv("KBUILD_SIGN_PIN");
|
||||
|
||||
#ifndef USE_PKCS7
|
||||
use_signed_attrs = CMS_NOATTR;
|
||||
#else
|
||||
use_signed_attrs = PKCS7_NOATTR;
|
||||
#endif
|
||||
|
||||
do {
|
||||
opt = getopt(argc, argv, "sdpk");
|
||||
switch (opt) {
|
||||
case 's': raw_sig = true; break;
|
||||
case 'p': save_sig = true; break;
|
||||
case 'd': sign_only = true; save_sig = true; break;
|
||||
#ifndef USE_PKCS7
|
||||
case 'k': use_keyid = CMS_USE_KEYID; break;
|
||||
#endif
|
||||
case -1: break;
|
||||
default: format();
|
||||
}
|
||||
} while (opt != -1);
|
||||
|
||||
argc -= optind;
|
||||
argv += optind;
|
||||
if (argc < 4 || argc > 5)
|
||||
format();
|
||||
|
||||
if (raw_sig) {
|
||||
raw_sig_name = argv[0];
|
||||
hash_algo = argv[1];
|
||||
} else {
|
||||
hash_algo = argv[0];
|
||||
private_key_name = argv[1];
|
||||
}
|
||||
x509_name = argv[2];
|
||||
module_name = argv[3];
|
||||
if (argc == 5 && strcmp(argv[3], argv[4]) != 0) {
|
||||
dest_name = argv[4];
|
||||
replace_orig = false;
|
||||
} else {
|
||||
ERR(asprintf(&dest_name, "%s.~signed~", module_name) < 0,
|
||||
"asprintf");
|
||||
replace_orig = true;
|
||||
}
|
||||
|
||||
#ifdef USE_PKCS7
|
||||
if (strcmp(hash_algo, "sha1") != 0) {
|
||||
fprintf(stderr, "sign-file: %s only supports SHA1 signing\n",
|
||||
OPENSSL_VERSION_TEXT);
|
||||
exit(3);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Open the module file */
|
||||
bm = BIO_new_file(module_name, "rb");
|
||||
ERR(!bm, "%s", module_name);
|
||||
|
||||
if (!raw_sig) {
|
||||
/* Read the private key and the X.509 cert the PKCS#7 message
|
||||
* will point to.
|
||||
*/
|
||||
private_key = read_private_key(private_key_name);
|
||||
x509 = read_x509(x509_name);
|
||||
|
||||
/* Digest the module data. */
|
||||
OpenSSL_add_all_digests();
|
||||
display_openssl_errors(__LINE__);
|
||||
digest_algo = EVP_get_digestbyname(hash_algo);
|
||||
ERR(!digest_algo, "EVP_get_digestbyname");
|
||||
|
||||
#ifndef USE_PKCS7
|
||||
/* Load the signature message from the digest buffer. */
|
||||
cms = CMS_sign(NULL, NULL, NULL, NULL,
|
||||
CMS_NOCERTS | CMS_PARTIAL | CMS_BINARY |
|
||||
CMS_DETACHED | CMS_STREAM);
|
||||
ERR(!cms, "CMS_sign");
|
||||
|
||||
ERR(!CMS_add1_signer(cms, x509, private_key, digest_algo,
|
||||
CMS_NOCERTS | CMS_BINARY |
|
||||
CMS_NOSMIMECAP | use_keyid |
|
||||
use_signed_attrs),
|
||||
"CMS_add1_signer");
|
||||
ERR(CMS_final(cms, bm, NULL, CMS_NOCERTS | CMS_BINARY) < 0,
|
||||
"CMS_final");
|
||||
|
||||
#else
|
||||
pkcs7 = PKCS7_sign(x509, private_key, NULL, bm,
|
||||
PKCS7_NOCERTS | PKCS7_BINARY |
|
||||
PKCS7_DETACHED | use_signed_attrs);
|
||||
ERR(!pkcs7, "PKCS7_sign");
|
||||
#endif
|
||||
|
||||
if (save_sig) {
|
||||
char *sig_file_name;
|
||||
BIO *b;
|
||||
|
||||
ERR(asprintf(&sig_file_name, "%s.p7s", module_name) < 0,
|
||||
"asprintf");
|
||||
b = BIO_new_file(sig_file_name, "wb");
|
||||
ERR(!b, "%s", sig_file_name);
|
||||
#ifndef USE_PKCS7
|
||||
ERR(i2d_CMS_bio_stream(b, cms, NULL, 0) < 0,
|
||||
"%s", sig_file_name);
|
||||
#else
|
||||
ERR(i2d_PKCS7_bio(b, pkcs7) < 0,
|
||||
"%s", sig_file_name);
|
||||
#endif
|
||||
BIO_free(b);
|
||||
}
|
||||
|
||||
if (sign_only) {
|
||||
BIO_free(bm);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/* Open the destination file now so that we can shovel the module data
|
||||
* across as we read it.
|
||||
*/
|
||||
bd = BIO_new_file(dest_name, "wb");
|
||||
ERR(!bd, "%s", dest_name);
|
||||
|
||||
/* Append the marker and the PKCS#7 message to the destination file */
|
||||
ERR(BIO_reset(bm) < 0, "%s", module_name);
|
||||
while ((n = BIO_read(bm, buf, sizeof(buf))),
|
||||
n > 0) {
|
||||
ERR(BIO_write(bd, buf, n) < 0, "%s", dest_name);
|
||||
}
|
||||
BIO_free(bm);
|
||||
ERR(n < 0, "%s", module_name);
|
||||
module_size = BIO_number_written(bd);
|
||||
|
||||
if (!raw_sig) {
|
||||
#ifndef USE_PKCS7
|
||||
ERR(i2d_CMS_bio_stream(bd, cms, NULL, 0) < 0, "%s", dest_name);
|
||||
#else
|
||||
ERR(i2d_PKCS7_bio(bd, pkcs7) < 0, "%s", dest_name);
|
||||
#endif
|
||||
} else {
|
||||
BIO *b;
|
||||
|
||||
/* Read the raw signature file and write the data to the
|
||||
* destination file
|
||||
*/
|
||||
b = BIO_new_file(raw_sig_name, "rb");
|
||||
ERR(!b, "%s", raw_sig_name);
|
||||
while ((n = BIO_read(b, buf, sizeof(buf))), n > 0)
|
||||
ERR(BIO_write(bd, buf, n) < 0, "%s", dest_name);
|
||||
BIO_free(b);
|
||||
}
|
||||
|
||||
sig_size = BIO_number_written(bd) - module_size;
|
||||
sig_info.sig_len = htonl(sig_size);
|
||||
ERR(BIO_write(bd, &sig_info, sizeof(sig_info)) < 0, "%s", dest_name);
|
||||
ERR(BIO_write(bd, magic_number, sizeof(magic_number) - 1) < 0, "%s", dest_name);
|
||||
|
||||
ERR(BIO_free(bd) < 0, "%s", dest_name);
|
||||
|
||||
/* Finally, if we're signing in place, replace the original. */
|
||||
if (replace_orig)
|
||||
ERR(rename(dest_name, module_name) < 0, "%s", dest_name);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user