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https://github.com/openssl/openssl.git
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455 lines
12 KiB
Perl
Executable File
455 lines
12 KiB
Perl
Executable File
#! /usr/bin/env perl
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# Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved.
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#
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# Licensed under the OpenSSL license (the "License"). You may not use
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# this file except in compliance with the License. You can obtain a copy
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# in the file LICENSE in the source distribution or at
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# https://www.openssl.org/source/license.html
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# The script embeds fingerprint into ELF executable object, either
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# application binary or shared library.
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######################################################################
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#
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# ELF symbol table parser by <appro@openssl.org>. The table entries
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# are extended with offset within executable file...
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#
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{ package ELF;
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use FileHandle;
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sub dup { my %copy=map {$_} @_; return \%copy; }
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sub Load {
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my $class = shift;
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my $self = {};
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my $FD = FileHandle->new(); # autoclose
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bless $self,$class;
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sysopen($FD,shift,0) or die "$!";
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binmode($FD);
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#################################################
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# read and parse elf_ehdr.e_ident...
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#
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read($FD,my $elf,16) or die "$!";
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my %e_ident;
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@e_ident{magic,class,data,version,osabi,abiver,pad}=
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unpack("a4C*",$elf);
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$!=42; # signal fipsld to revert to two-step link
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die "not ELF file" if ($e_ident{magic} ne chr(0177)."ELF");
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my $elf_bits = $e_ident{class}*32; # 32 or 64
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my $big_endian = $e_ident{data}-1; # 0 or 1
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if ($elf_bits==64) {
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if (!(((1<<31)<<1) && $big_endian==(unpack("L",pack("N",1))==1))) {
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die "ELF64 is supported only natively";
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}
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}
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#################################################
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# read and parse remainder of elf_ehdr...
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#
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read($FD,my $elfhdr,64) or die "$!";
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my %elf_ehdr;
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@elf_ehdr{e_type,e_machine,e_version,
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e_entry,e_phoff,e_shoff,e_flags,e_ehsize,
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e_phentsize,e_phnum,e_shentsize,e_shnum,e_shstrndx} =
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$elf_bits==32 ?
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unpack($big_endian?"nnN5n6":"vvV5v6",$elfhdr)
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: unpack("SSLQ3LS6",$elfhdr);
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# put aside e_machine in case one has to treat specific
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# platforms differently, see EM_ constants in elf.h for
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# assortment...
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$self->{e_machine} = $elf_ehdr{e_machine};
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#################################################
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# read and parse elf_shdr table...
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#
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my ($i,$sz,$symtab_idx,$blob,$strings);
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seek($FD,$elf_ehdr{e_shoff},0) or die "$!";
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read($FD,$blob,$elf_ehdr{e_shentsize}*$elf_ehdr{e_shnum}) or die "$!";
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my @sections;
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my $elf_shdr_struct=($elf_bits==32?($big_endian?"N10":"V10"):"L2Q4L2Q2");
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for ($sz=$elf_ehdr{e_shentsize},$i=0;$i<length($blob);$i+=$sz) {
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my %elf_shdr;
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@elf_shdr{sh_name,sh_type,sh_flags,
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sh_addr,sh_offset,sh_size,
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sh_link,sh_info,sh_addalign,sh_entsize} =
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unpack($elf_shdr_struct,substr($blob,$i,$sz));
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push(@sections,dup(%elf_shdr));
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# note SHT_SYMTAB or SHT_DYNSYM for future reference
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if ($elf_shdr{sh_type}==2 || $elf_shdr{sh_type}==11) {
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$symtab_idx = $#sections;
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}
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}
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# read strings table and map section names...
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seek($FD,@sections[$elf_ehdr{e_shstrndx}]->{sh_offset},0) or die "$!";
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read($FD,$strings,@sections[$elf_ehdr{e_shstrndx}]->{sh_size}) or die "$!";
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for (@sections) {
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$_->{sh_name}=(split(chr(0),substr($strings,$_->{sh_name},64)))[0];
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}
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#################################################
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# read symbol strings table...
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#
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$i=@sections[$symtab_idx]->{sh_link};
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seek($FD,@sections[$i]->{sh_offset},0) or die "$!";
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read($FD,$strings,@sections[$i]->{sh_size}) or die "$!";
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#################################################
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# read and parse elf_sym table...
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#
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seek($FD,@sections[$symtab_idx]->{sh_offset},0) or die "$!";
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read($FD,my $blob,@sections[$symtab_idx]->{sh_size}) or die "$!";
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for ($sz=@sections[$symtab_idx]->{sh_entsize},$i=0;$i<length($blob);$i+=$sz) {
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my %elf_sym;
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if ($elf_bits==32) {
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@elf_sym{st_name,st_value,st_size,st_info,st_other,st_shndx} =
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unpack($big_endian?"N3CCn":"V3CCv",substr($blob,$i,$sz));
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} else {
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@elf_sym{st_name,st_info,st_other,st_shndx,st_value,st_size} =
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unpack("LCCSQQ",substr($blob,$i,$sz));
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}
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my $st_type = $elf_sym{st_info}&0xf;
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my $st_bind = $elf_sym{st_info}>>4;
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my $st_secn = $elf_sym{st_shndx};
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my $name;
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# (STT_OBJECT || STT_FUNC)
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if ($st_bind<3 && ($st_type==1 || $st_type==2)
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&& $st_secn <= $#sections # sane st_shndx
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&& @sections[$st_secn]->{sh_type} # not SHN_UNDEF
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&& ($name=(split(chr(0),substr($strings,$elf_sym{st_name},128)))[0])
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) {
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# synthesize st_offset, ...
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$elf_sym{st_offset} = $elf_sym{st_value}
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- @sections[$st_secn]->{sh_addr}
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+ @sections[$st_secn]->{sh_offset};
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$elf_sym{st_name} = $name;
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$elf_sym{st_section} = @sections[$st_secn]->{sh_name};
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# ... and add to lookup table
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$self->{symbols}{$name} = dup(%elf_sym);
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}
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}
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return $self;
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}
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sub Lookup {
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my $self = shift;
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my $name = shift;
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return $self->{symbols}{$name};
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}
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sub Traverse {
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my $self = shift;
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my $code = shift;
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if (ref($code) eq 'CODE') {
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for (keys(%{$self->{symbols}})) { &$code($self->{symbols}{$_}); }
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}
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}
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}
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######################################################################
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#
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# SHA1 and HMAC in Perl by <appro@openssl.org>.
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#
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{ package SHA1;
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use integer;
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{
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################################### SHA1 block code generator
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my @V = ('$A','$B','$C','$D','$E');
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my $i;
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sub XUpdate {
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my $ret;
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$ret="(\$T=\$W[($i-16)%16]^\$W[($i-14)%16]^\$W[($i-8)%16]^\$W[($i-3)%16],\n\t";
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if ((1<<31)<<1) {
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$ret.=" \$W[$i%16]=((\$T<<1)|(\$T>>31))&0xffffffff)\n\t ";
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} else {
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$ret.=" \$W[$i%16]=(\$T<<1)|((\$T>>31)&1))\n\t ";
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}
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}
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sub tail {
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my ($a,$b,$c,$d,$e)=@V;
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my $ret;
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if ((1<<31)<<1) {
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$ret.="(($a<<5)|($a>>27));\n\t";
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$ret.="$b=($b<<30)|($b>>2); $e&=0xffffffff; #$b&=0xffffffff;\n\t";
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} else {
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$ret.="(($a<<5)|($a>>27)&0x1f);\n\t";
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$ret.="$b=($b<<30)|($b>>2)&0x3fffffff;\n\t";
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}
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$ret;
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}
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sub BODY_00_15 {
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my ($a,$b,$c,$d,$e)=@V;
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"$e+=\$W[$i]+0x5a827999+((($c^$d)&$b)^$d)+".tail();
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}
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sub BODY_16_19 {
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my ($a,$b,$c,$d,$e)=@V;
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"$e+=".XUpdate()."+0x5a827999+((($c^$d)&$b)^$d)+".tail();
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}
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sub BODY_20_39 {
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my ($a,$b,$c,$d,$e)=@V;
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"$e+=".XUpdate()."+0x6ed9eba1+($b^$c^$d)+".tail();
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}
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sub BODY_40_59 {
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my ($a,$b,$c,$d,$e)=@V;
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"$e+=".XUpdate()."+0x8f1bbcdc+(($b&$c)|(($b|$c)&$d))+".tail();
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}
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sub BODY_60_79 {
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my ($a,$b,$c,$d,$e)=@V;
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"$e+=".XUpdate()."+0xca62c1d6+($b^$c^$d)+".tail();
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}
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my $sha1_impl =
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'sub block {
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my $self = @_[0];
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my @W = unpack("N16",@_[1]);
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my ($A,$B,$C,$D,$E,$T) = @{$self->{H}};
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';
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$sha1_impl.='
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$A &= 0xffffffff;
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$B &= 0xffffffff;
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' if ((1<<31)<<1);
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for($i=0;$i<16;$i++){ $sha1_impl.=BODY_00_15(); unshift(@V,pop(@V)); }
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for(;$i<20;$i++) { $sha1_impl.=BODY_16_19(); unshift(@V,pop(@V)); }
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for(;$i<40;$i++) { $sha1_impl.=BODY_20_39(); unshift(@V,pop(@V)); }
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for(;$i<60;$i++) { $sha1_impl.=BODY_40_59(); unshift(@V,pop(@V)); }
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for(;$i<80;$i++) { $sha1_impl.=BODY_60_79(); unshift(@V,pop(@V)); }
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$sha1_impl.='
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$self->{H}[0]+=$A; $self->{H}[1]+=$B; $self->{H}[2]+=$C;
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$self->{H}[3]+=$D; $self->{H}[4]+=$E; }';
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#print $sha1_impl,"\n";
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eval($sha1_impl); # generate code
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}
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sub Init {
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my $class = shift; # multiple instances...
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my $self = {};
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bless $self,$class;
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$self->{H} = [0x67452301,0xefcdab89,0x98badcfe,0x10325476,0xc3d2e1f0];
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$self->{N} = 0;
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return $self;
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}
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sub Update {
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my $self = shift;
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my $msg;
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foreach $msg (@_) {
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my $len = length($msg);
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my $num = length($self->{buf});
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my $off = 0;
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$self->{N} += $len;
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if (($num+$len)<64)
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{ $self->{buf} .= $msg; next; }
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elsif ($num)
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{ $self->{buf} .= substr($msg,0,($off=64-$num));
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$self->block($self->{buf});
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}
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while(($off+64) <= $len)
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{ $self->block(substr($msg,$off,64));
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$off += 64;
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}
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$self->{buf} = substr($msg,$off);
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}
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return $self;
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}
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sub Final {
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my $self = shift;
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my $num = length($self->{buf});
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$self->{buf} .= chr(0x80); $num++;
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if ($num>56)
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{ $self->{buf} .= chr(0)x(64-$num);
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$self->block($self->{buf});
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$self->{buf}=undef;
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$num=0;
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}
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$self->{buf} .= chr(0)x(56-$num);
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$self->{buf} .= pack("N2",($self->{N}>>29)&0x7,$self->{N}<<3);
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$self->block($self->{buf});
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return pack("N*",@{$self->{H}});
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}
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sub Selftest {
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my $hash;
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$hash=SHA1->Init()->Update('abc')->Final();
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die "SHA1 test#1" if (unpack("H*",$hash) ne 'a9993e364706816aba3e25717850c26c9cd0d89d');
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$hash=SHA1->Init()->Update('abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq')->Final();
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die "SHA1 test#2" if (unpack("H*",$hash) ne '84983e441c3bd26ebaae4aa1f95129e5e54670f1');
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#$hash=SHA1->Init()->Update('a'x1000000)->Final();
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#die "SHA1 test#3" if (unpack("H*",$hash) ne '34aa973cd4c4daa4f61eeb2bdbad27316534016f');
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}
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}
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{ package HMAC;
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sub Init {
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my $class = shift;
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my $key = shift;
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my $self = {};
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bless $self,$class;
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if (length($key)>64) {
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$key = SHA1->Init()->Update($key)->Final();
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}
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$key .= chr(0x00)x(64-length($key));
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my @ikey = map($_^=0x36,unpack("C*",$key));
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($self->{hash} = SHA1->Init())->Update(pack("C*",@ikey));
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$self->{okey} = pack("C*",map($_^=0x36^0x5c,@ikey));
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return $self;
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}
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sub Update {
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my $self = shift;
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$self->{hash}->Update(@_);
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return $self;
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}
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sub Final {
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my $self = shift;
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my $ihash = $self->{hash}->Final();
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return SHA1->Init()->Update($self->{okey},$ihash)->Final();
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}
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sub Selftest {
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my $hmac;
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$hmac = HMAC->Init('0123456789:;<=>?@ABC')->Update('Sample #2')->Final();
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die "HMAC test" if (unpack("H*",$hmac) ne '0922d3405faa3d194f82a45830737d5cc6c75d24');
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}
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}
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######################################################################
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#
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# main()
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#
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my $legacy_mode;
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if ($ARGV<0 || ($#ARGV>0 && !($legacy_mode=(@ARGV[0] =~ /^\-(dso|exe)$/)))) {
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print STDERR "usage: $0 [-dso|-exe] elfbinary\n";
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exit(1);
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}
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$exe = ELF->Load(@ARGV[$#ARGV]);
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$FIPS_text_start = $exe->Lookup("FIPS_text_start") or die;
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$FIPS_text_end = $exe->Lookup("FIPS_text_end") or die;
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$FIPS_rodata_start = $exe->Lookup("FIPS_rodata_start") or die;
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$FIPS_rodata_end = $exe->Lookup("FIPS_rodata_end") or die;
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$FIPS_signature = $exe->Lookup("FIPS_signature") or die;
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# new cross-compile support
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$FIPS_text_startX = $exe->Lookup("FIPS_text_startX");
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$FIPS_text_endX = $exe->Lookup("FIPS_text_endX");
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if (!$legacy_mode) {
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if (!$FIPS_text_startX || !$FIPS_text_endX) {
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print STDERR "@ARGV[$#ARGV] is not cross-compiler aware.\n";
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exit(42); # signal fipsld to revert to two-step link
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}
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$FINGERPRINT_ascii_value
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= $exe->Lookup("FINGERPRINT_ascii_value");
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}
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if ($FIPS_text_startX && $FIPS_text_endX) {
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$FIPS_text_start = $FIPS_text_startX;
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$FIPS_text_end = $FIPS_text_endX;
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}
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sysopen(FD,@ARGV[$#ARGV],$legacy_mode?0:2) or die "$!"; # 2 is read/write
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binmode(FD);
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sub HMAC_Update {
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my ($hmac,$off,$len) = @_;
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my $blob;
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seek(FD,$off,0) or die "$!";
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read(FD,$blob,$len) or die "$!";
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$$hmac->Update($blob);
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}
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# fips/fips.c:FIPS_incore_fingerprint's Perl twin
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#
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sub FIPS_incore_fingerprint {
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my $p1 = $FIPS_text_start->{st_offset};
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my $p2 = $FIPS_text_end->{st_offset};
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my $p3 = $FIPS_rodata_start->{st_offset};
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my $p4 = $FIPS_rodata_end->{st_offset};
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my $sig = $FIPS_signature->{st_offset};
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my $ctx = HMAC->Init("etaonrishdlcupfm");
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# detect overlapping regions
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if ($p1<=$p3 && $p2>=$p3) {
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$p3 = $p1; $p4 = $p2>$p4?$p2:$p4; $p1 = 0; $p2 = 0;
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} elsif ($p3<=$p1 && $p4>=$p1) {
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$p3 = $p3; $p4 = $p2>$p4?$p2:$p4; $p1 = 0; $p2 = 0;
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}
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if ($p1) {
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HMAC_Update (\$ctx,$p1,$p2-$p1);
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}
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if ($sig>=$p3 && $sig<$p4) {
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# "punch" hole
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HMAC_Update(\$ctx,$p3,$sig-$p3);
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$p3 = $sig+20;
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HMAC_Update(\$ctx,$p3,$p4-$p3);
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} else {
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HMAC_Update(\$ctx,$p3,$p4-$p3);
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}
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return $ctx->Final();
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}
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$fingerprint = FIPS_incore_fingerprint();
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if ($legacy_mode) {
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print unpack("H*",$fingerprint);
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} elsif (defined($FINGERPRINT_ascii_value)) {
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seek(FD,$FINGERPRINT_ascii_value->{st_offset},0) or die "$!";
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print FD unpack("H*",$fingerprint) or die "$!";
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} else {
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seek(FD,$FIPS_signature->{st_offset},0) or die "$!";
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print FD $fingerprint or die "$!";
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}
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close (FD);
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