ÿØÿà JFIF    ÿÛ „  ( %"1!%)+...383,7(-.+  -+++--++++---+-+-----+---------------+---+-++7-----ÿÀ  ß â" ÿÄ     ÿÄ H    !1AQaq"‘¡2B±ÁÑð#R“Ò Tbr‚²á3csƒ’ÂñDS¢³$CÿÄ   ÿÄ %  !1AQa"23‘ÿÚ   ? ôÿ ¨pŸªáÿ —åYõõ\?àÒü©ŠÄï¨pŸªáÿ —åYõõ\?àÓü©ŠÄá 0Ÿªáÿ Ÿå[úƒ ú®ði~TÁbqÐ8OÕpÿ ƒOò¤Oè`–RÂáœá™êi€ßÉ< FtŸI“öÌ8úDf´°å}“¾œ6  öFá°y¥jñÇh†ˆ¢ã/ÃÐ:ªcÈ "Y¡ðÑl>ÿ ”ÏËte:qž\oäŠe÷󲍷˜HT4&ÿ ÓÐü6ö®¿øþßèô Ÿ•7Ñi’•j|“ñì>b…þS?*Óôÿ ÓÐü*h¥£ír¶ü UãSç‚Ÿ[AÐaè[ûª•õ&õj?†Éö+EzP—WeÒírJFt ‘BŒ†Ï‡%#tE Øz ¥OÛ«!1›üä±Í™%ºÍãö]°î(–:@<‹ŒÊö×òÆt¦ãº+‡¦%ÌÁ²h´OƒJŒtMÜ>ÀÜÊw3Y´•牋4ǍýʏTì>œú=Íwhyë,¾Ôò×õ¿ßÊa»«þˆѪQ|%6ž™A õ%:øj<>É—ÿ Å_ˆCbõ¥š±ý¯Ýƒï…¶|RëócÍf溪“t.СøTÿ *Ä¿-{†çàczůŽ_–^XþŒ±miB[X±d 1,é”zEù»& î9gœf™9Ð'.;—™i}!ôšåîqêÛ٤ёý£½ÆA–àôe"A$˝Úsäÿ ÷Û #°xŸëí(l »ý3—¥5m! rt`†0~'j2(]S¦¦kv,ÚÇ l¦øJA£Šƒ J3E8ÙiŽ:cÉžúeZ°€¯\®kÖ(79«Ž:¯X”¾³Š&¡* ….‰Ž(ÜíŸ2¥ª‡×Hi²TF¤ò[¨íÈRëÉ䢍mgÑ.Ÿ<öäS0í„ǹÁU´f#Vß;Õ–…P@3ío<ä-±»Ž.L|kªÀê›fÂ6@»eu‚|ÓaÞÆŸ…¨ááå>åŠ?cKü6ùTÍÆ”†sĤÚ;H2RÚ†õ\Ö·Ÿn'¾ ñ#ºI¤Å´%çÁ­‚â7›‹qT3Iï¨ÖÚ5I7Ë!ÅOóŸ¶øÝñØôת¦$Tcö‘[«Ö³šÒ';Aþ ¸èíg A2Z"i¸vdÄ÷.iõ®§)¿]¤À†–‡É&ä{V¶iŽ”.Ó×Õÿ û?h¬Mt–íª[ÿ Ñÿ ÌV(í}=ibÔ¡›¥¢±b Lô¥‡piη_Z<‡z§èŒ)iÖwiÇ 2hÙ3·=’d÷8éŽ1¦¸c¤µ€7›7Ø ð\á)} ¹fËí›pAÃL%âc2 í§æQz¿;T8sæ°qø)QFMð‰XŒÂ±N¢aF¨…8¯!U  Z©RÊ ÖPVÄÀÍin™Ì-GˆªÅËŠ›•zË}º±ŽÍFò¹}Uw×#ä5B¤{î}Ð<ÙD é©¤&‡ïDbàÁôMÁ." ¤‡ú*õ'VŽ|¼´Úgllº¼klz[Æüï÷Aób‡Eÿ dÑ»Xx9ÃÜ£ÁT/`¼¸vI±Ýµ·Ë‚“G³þ*Ÿû´r|*}<¨îºœ @¦mÄ’M¹”.œ«Y–|6ÏU¤jç¥ÕÞqO ˜kDÆÁ¨5ÿ š;Њ¦¦€GÙk \ –Þ=â¼=SͧµªS°ÚÍpÜãQűÀõ¬?ÃÁ1Ñ•õZà?hóœ€ L¦l{Y*K˜Ù›zc˜–ˆâ ø+¾ ­-Ök¥%ùEÜA'}ˆ><ÊIè“bpÍ/qÞâvoX€w,\úªò6Z[XdÒæ­@Ö—€$òJí#é>'°Ú ôª˜<)4ryÙ£|óAÅn5žêŸyÒäMÝ2{"}‰–¤l÷ûWX\l¾Á¸góÉOÔ /óñB¤f¸çñ[.P˜ZsÊË*ßT܈§QN¢’¡¨§V¼(Üù*eÕ“”5T¨‹Âê¥FŒã½Dü[8'Ò¥a…Ú¶k7a *•›¼'Ò·\8¨ª\@\õ¢¦íq+DÙrmÎ…_ªæ»ŠÓœ¡¯’Ré9MÅ×D™lælffc+ŒÑ,ý™ÿ ¯þǤ=Å’Á7µ÷ÚÛ/“Ü€ñýã¼àí¾ÕÑ+ƒ,uµMâÀÄbm:ÒÎPæ{˜Gz[ƒ¯«® KHà`ßØŠéí¯P8Aq.C‰ à€kòpj´kN¶qô€…Õ,ÜNŠª-­{Zö’æû44‰sŽè‰îVíRœÕm" 6?³D9¡ÇTíÅꋇ`4«¸ÝÁô ï’ýorqКÇZ«x4Žâéþuïf¹µö[P ,Q£éaX±`PÉÍZ ¸äYúg üAx ’6Lê‚xÝÓ*äQ  Ï’¨hÍ =²,6ï#rÃ<¯–£»ƒ‹,–ê•€ aÛsñ'%Æ"®ÛüìBᝠHÚ3ß°©$“XnœÖ’î2ËTeûìxîß ¦å¿çÉ ðK§þ{‘t‚Ϋ¬jéîZ[ ”š7L¥4VÚCE×]m¤Øy”ä4-dz£œ§¸x.*ãÊÊ b÷•h:©‡¦s`BTÁRû¾g⻩‹jø sF¢àJøFl‘È•Xᓁà~*j¯ +(ÚÕ6-£¯÷GŠØy‚<Ç’.F‹Hœw(+)ÜÜâÈzÄäT§FߘãÏ;DmVœ3Àu@mÚüXÝü•3B¨òÌÁÛ<·ÃÜ z,Ì@õÅ·d2]ü8s÷IôÞ¯^Ç9¢u„~ëAŸï4«M? K]­ÅàPl@s_ p:°¬ZR”´›JC[CS.h‹ƒïËœ«Æ]–÷ó‚wR×k7X‰k›‘´ù¦=¡«‰¨¨Â')—71ó’c‡Ðúµ `é.{§p¹ój\Ž{1h{o±Ý=áUÊïGÖŒõ–-BÄm+AZX¶¡ ïHðæ¥JmÙ;…ä¡Ÿˆ¦ ° äšiÉg«$üMk5¤L“’çÊvïâï ,=f“"íἊ5ô¬x6{ɏžID0e¸vçmi'︧ºð9$ò¹÷*£’9ÿ ²TÔ…×>JV¥}Œ}$p[bÔ®*[jzS*8 ”·T›Í–ñUîƒwo$áè=LT™ç—~ô·¤ÈÚ$榍q‰„+´kFm)ž‹©i–ËqÞŠ‰à¶ü( ‚•§ •°ò·‡#5ª•µÊ﯅¡X¨šÁ*F#TXJÊ ušJVÍ&=iÄs1‚3•'fý§5Ñ<=[íÞ­ PÚ;ѱÌ_~Ä££8rÞ ²w;’hDT°>ÈG¬8Á²ÚzŽ®ò®qZcqJêäÞ-ö[ܘbň±çb“Š¶31²n×iƒðÕ;1¶þÉ ªX‰,ßqÏ$>•î íZ¥Z 1{ç൵+ƒÕµ¥°T$§K]á»Ûï*·¤tMI’ÂZbŽÕiÒ˜}bÓ0£ª5›¨ [5Ž^ÝœWøÂÝh° ¢OWun£¤5 a2Z.G2³YL]jåtì”ä ÁÓ‘%"©<ÔúÊ°sº UZvä‡ÄiÆÒM .÷V·™ø#kèýiíÌ–ª)µT[)BˆõÑ xB¾B€ÖT¨.¥~ð@VĶr#¸ü*åZNDŽH;âi ],©£öØpù(šºãö¼T.uCê•4@ÿ GÕÛ)Cx›®0ø#:ÏðFÒbR\(€€Ä®fã4Þ‰Fä¯HXƒÅ,†öEÑÔÜ]Öv²?tLÃvBY£ú6Êu5ÅAQ³1‘’¬x–HŒÐ‡ ^ ¸KwJôÖŽ5×CÚ¨vÜ«/B0$×k°=ðbÇ(Ï)w±A†Á† 11Í=èQšµ626ŒÜ/`G«µ<}—-Ö7KEHÈÉðóȤmݱû±·ø«Snmá=“ä«šmݱŸ¡¶~ó·“äUóJæúòB|E LêŽy´jDÔ$G¢þÐñ7óR8ýÒ…Ç› WVe#·Ÿ p·Fx~•ݤF÷0Èÿ K¯æS<6’¡WШ; ´ÿ ¥Êø\Òuî†åÝ–VNœkÒ7oòX¨Á­Ø÷FÎÑä±g÷ÿ M~Çî=p,X´ ÝÌÚÅ‹’ÃjÖ.ØöÏñ qïQ¤ÓZE†° =6·]܈ s¸>v•Ž^Ý\wq9r‰Î\¸¡kURÒ$­*‹Nq?Þª*!sŠÆ:TU_u±T+øX¡ ®¹¡,ÄâÃBTsÜ$Ø›4m椴zÜK]’’›Pƒ @€#â˜`é¹=I‡fiV•Ôî“nRm+µFPOhÍ0B£ €+¬5c v•:P'ÒyÎ ‰V~‚Ó†ÖuókDoh$å\*ö%Ю=£«…aȼ½÷Û.-½VŒŠ¼'lyî±1¬3ó#ÞE¿ÔS¤gV£m›=§\û"—WU¤ÚǼÿ ÂnÁGŒÃ ‚õN D³õNÚíŒÕ;HôyÄÈ©P¹Ä{:?R‘Ô¨âF÷ø£bÅó® JS|‚R÷ivýáâ€Æé¡è³´IئÑT!§˜•Øª‚¬â@q€wnïCWÄ@JU€ê¯m6]Ï:£âx'+ÒðXvÓ¦Úm=–´7œ $ì“B£~p%ÕŸUþ« N@¼üï~w˜ñø5®—'Ôe»¤5ã//€ž~‰Tþ›Å7•#¤× Íö pÄ$ùeåì*«ÓŠEØWEÈsßg ¦ûvžSsLpºÊW–âµEWöˬH; ™!CYõZ ÃÄf æ#1W. \uWâ\,\Çf j’<qTbên›Î[vxx£ë 'ö¨1›˜ÀM¼Pÿ H)ƒêêŒA7s,|F“ 꺸k³9Ìö*ç®;Ö!Ö$Eiž•¹ÒÚ†ýóéÝû¾ÕS®ó$’NÝäŸz¤5r¦ãÄÃD÷Üø!°ø‡Ô&@m™Ì^Ãä­d q5Lnÿ N;.6½·N|#ä"1Nƒx“ã<3('&ñßt  ~ªu”1Tb㫨9ê–›–bìd$ߣ=#ÕãÒmU¯eí$EFù5ýYô櫨æ왍Ǘ±ssM]·á¿0ÕåJRÓªîiƒ+O58ÖñªŠÒx" \µâá¨i’¤i —Ö ” M+M¤ë9‚‰A¦°Qõ¾ßøK~¼Ã‘g…Ö´~÷Ï[3GUœÒ½#…kàÔ®Ò”‰³·dWV‰IP‰Ú8u¹”E ÖqLj¾êÕCBš{A^Âß;–¨`¯¬ìö ˼ ×tìø.tƐm*n¨y4o&Àx¥n¦×î‡aupáÛj8¿m›è¶ã!o½;ß0y^ý×^EÑ¿ÒjzŒ­)vÚÑnÄL …^ªô× ‡—‚3k Îý­hï]içå–îÏ*÷ñþ»Ô CÒjøjÍznˆ´ ¹#b'Fô‹ ‰v¥'’à'T´ƒHýÍ%M‰ ƒ&ÆÇŒï1 ‘ –Þ ‰i¬s žR-Ÿ kŠ¬á¬7:þ 0ŒÅÒÕ/aÙ¬ÃÝ#Úøœ ©aiVc‰. ¹¦ãµ” ›Yg¦›ÆÎýº°f³7ƒhá·¸­}&D9¡ÂsÉÙÞèŠõØàC™¨ñbFC|´Ü(ŸƒÚÒ-%»'a Ì¿)ËÇn¿úÿ ÞŽX…4ÊÅH^ôΑí@ù¹Eh¶“L8Çjù ¼ÎåVªóR©Ï5uà V4lZß®=€xÖŸ–ÑÈ ÷”¨°¾__yM1tÉ?uÆþIkÄgæ@þ[¢†°XÃJ£j·:nkÅ¢u ‘}âGzö­/IµèŠ¬¼48q¦F°ŽR¼=ûì{´¯RýicS ÕÛ íNtÍÙï£,w4rêì®»~x(©Uñ§#Ñ&œÕ¤>ÎåÍÓ9’Ö{9eV­[Öjâ²ãu]˜å2›qÑšÕJç0€sÄ|Êëè0튔bÁ>“{×_F`Ø©ºê:µä,v¤ðfc1±"«ÔÍän1#=· Âøv~H½ÐßA¾¿Ü€Óš]Õ; I¾÷ç‚Qi†î¹9ywÔKG˜áñ zQY—§ÃÕZ07§X‚ Áh;ÁM)iÌCH-¯T‘ë|A0{Ò½LÚ–TâÖkÜ’dÀ“rmm»”جPF³ÖcbE§T€ÒxKºû’Ó®7±²(\4ŽÃ¸Uu@j™yĵ;³µ!Á¢b.W¤=mõ´êµK k ¸K^ÜÛ#p*Ü14qkZç5ïë †°5Ï%ÍÛ<Õ¤×Ô¥ê†C Õ´¼ú$ƒÖ“”]Ù¬qÞÚ[4©ý!ûÏ—Áb쳐XµA¬â~`›Çr¸8ìùÝ䫦<>ä÷«?xs´ÇÑ /á;¹øüÊÈÙà{"@Žïzâ¬[âß‚ U_<ÇŸ½4èN˜ú61®qŠu ¦þF£»äJ_ˆÙÎ~ ÞAã–Ý„Ï—rŠD;xTž‘ô`É«…suãO`?³à™ô Lý#Íc5öoæØ‚y´´÷«ZR§<&JÇ+éâô´€i!Àˆ0æAoàðLèÖ-2ŸõW.’t^–(KÁmHµV@xÜÇy®Ñø­â^:Ú3w· 7½¹°ñ¸â¹®:',«Mœ—n­Á+Ãbš LÈ‘ÄnRÓÅœ%¦²‰¨ùQ:¤f‚ "PÕtô¸…cæl…&˜Ú˜Ôkv‹ž+vŠ,=¢v­6—Xy*¥t£«<™:“aîϲ=¦6rO]XI¿Œ÷¤zÚ­›¶ 6÷”w\d ü~v®ˆÌk«^m<ÿ ¢‰Õ\)ùºŽ;… lîÙÅEŠ®cѾ@vnMÏ,¼“ñ•ŽBxðÃzãÇç%3ˆ"}Ù•Åî> BÉú;Ò]V+P˜F_´ßé> Øše|ï‡ÄOmFæÇ ãqÞ$/xÐx­z`ï9"œÜij‚!7.\Td…9M‡•iŽ‹¾‘50ÞŽn¥ß4ÉôO ¹*í^QêËÜÇÌ8=Ž§s‰'ÂëÙ«á%Pú[O †ÅP¯VsŽ°.‰,kc¶ ¬A9n˜XÎ-ÞšN["¹QÕ‰ƒMýÁߺXJæÍaLj¾×Ãmã¾ãÚ uñÒþåQô¦¥ /ÄUx:‚ÍÜ’ Đ©ØÝ3V¨‰ÕnÐ6ó*óúK­«…c ¯U òhsý­jóÔj#,ímŒRµ«lbïUTŒÑ8†Ä0œÏr`ð¡¬É Ї ë"À² ™ 6¥ f¶ ¢ÚoܱԷ-<Àî)†a¶ž'Ú»¨TXqØæ¶÷YÄHy˜9ÈIW­YÀuMFë ºÏ’AqÌ4·/Ú †ô'i$øä­=Ä Ý|öK×40è|È6p‘0§)o¥ctî§H+CA-“ xØ|ÐXŠç l8íºð3Ø:³¤¬KX¯UÿÙ /* Write the contents of the into kernel symbol system_extra_cert * * Copyright (C) IBM Corporation, 2015 * * Author: Mehmet Kayaalp * * This software may be used and distributed according to the terms * of the GNU General Public License, incorporated herein by reference. * * Usage: insert-sys-cert [-s ] -b -c * [-s ] -z -c */ #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define CERT_SYM "system_extra_cert" #define USED_SYM "system_extra_cert_used" #define LSIZE_SYM "system_certificate_list_size" #define info(format, args...) fprintf(stderr, "INFO: " format, ## args) #define warn(format, args...) fprintf(stdout, "WARNING: " format, ## args) #define err(format, args...) fprintf(stderr, "ERROR: " format, ## args) #if UINTPTR_MAX == 0xffffffff #define CURRENT_ELFCLASS ELFCLASS32 #define Elf_Ehdr Elf32_Ehdr #define Elf_Shdr Elf32_Shdr #define Elf_Sym Elf32_Sym #else #define CURRENT_ELFCLASS ELFCLASS64 #define Elf_Ehdr Elf64_Ehdr #define Elf_Shdr Elf64_Shdr #define Elf_Sym Elf64_Sym #endif static unsigned char endianness(void) { uint16_t two_byte = 0x00FF; uint8_t low_address = *((uint8_t *)&two_byte); if (low_address == 0) return ELFDATA2MSB; else return ELFDATA2LSB; } struct sym { char *name; unsigned long address; unsigned long offset; void *content; int size; }; static unsigned long get_offset_from_address(Elf_Ehdr *hdr, unsigned long addr) { Elf_Shdr *x; unsigned int i, num_sections; x = (void *)hdr + hdr->e_shoff; if (hdr->e_shnum == SHN_UNDEF) num_sections = x[0].sh_size; else num_sections = hdr->e_shnum; for (i = 1; i < num_sections; i++) { unsigned long start = x[i].sh_addr; unsigned long end = start + x[i].sh_size; unsigned long offset = x[i].sh_offset; if (addr >= start && addr <= end) return addr - start + offset; } return 0; } #define LINE_SIZE 100 static void get_symbol_from_map(Elf_Ehdr *hdr, FILE *f, char *name, struct sym *s) { char l[LINE_SIZE]; char *w, *p, *n; s->size = 0; s->address = 0; s->offset = 0; if (fseek(f, 0, SEEK_SET) != 0) { perror("File seek failed"); exit(EXIT_FAILURE); } while (fgets(l, LINE_SIZE, f)) { p = strchr(l, '\n'); if (!p) { err("Missing line ending.\n"); return; } n = strstr(l, name); if (n) break; } if (!n) { err("Unable to find symbol: %s\n", name); return; } w = strchr(l, ' '); if (!w) return; *w = '\0'; s->address = strtoul(l, NULL, 16); if (s->address == 0) return; s->offset = get_offset_from_address(hdr, s->address); s->name = name; s->content = (void *)hdr + s->offset; } static Elf_Sym *find_elf_symbol(Elf_Ehdr *hdr, Elf_Shdr *symtab, char *name) { Elf_Sym *sym, *symtab_start; char *strtab, *symname; unsigned int link; Elf_Shdr *x; int i, n; x = (void *)hdr + hdr->e_shoff; link = symtab->sh_link; symtab_start = (void *)hdr + symtab->sh_offset; n = symtab->sh_size / symtab->sh_entsize; strtab = (void *)hdr + x[link].sh_offset; for (i = 0; i < n; i++) { sym = &symtab_start[i]; symname = strtab + sym->st_name; if (strcmp(symname, name) == 0) return sym; } err("Unable to find symbol: %s\n", name); return NULL; } static void get_symbol_from_table(Elf_Ehdr *hdr, Elf_Shdr *symtab, char *name, struct sym *s) { Elf_Shdr *sec; int secndx; Elf_Sym *elf_sym; Elf_Shdr *x; x = (void *)hdr + hdr->e_shoff; s->size = 0; s->address = 0; s->offset = 0; elf_sym = find_elf_symbol(hdr, symtab, name); if (!elf_sym) return; secndx = elf_sym->st_shndx; if (!secndx) return; sec = &x[secndx]; s->size = elf_sym->st_size; s->address = elf_sym->st_value; s->offset = s->address - sec->sh_addr + sec->sh_offset; s->name = name; s->content = (void *)hdr + s->offset; } static Elf_Shdr *get_symbol_table(Elf_Ehdr *hdr) { Elf_Shdr *x; unsigned int i, num_sections; x = (void *)hdr + hdr->e_shoff; if (hdr->e_shnum == SHN_UNDEF) num_sections = x[0].sh_size; else num_sections = hdr->e_shnum; for (i = 1; i < num_sections; i++) if (x[i].sh_type == SHT_SYMTAB) return &x[i]; return NULL; } static void *map_file(char *file_name, int *size) { struct stat st; void *map; int fd; fd = open(file_name, O_RDWR); if (fd < 0) { perror(file_name); return NULL; } if (fstat(fd, &st)) { perror("Could not determine file size"); close(fd); return NULL; } *size = st.st_size; map = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); if (map == MAP_FAILED) { perror("Mapping to memory failed"); close(fd); return NULL; } close(fd); return map; } static char *read_file(char *file_name, int *size) { struct stat st; char *buf; int fd; fd = open(file_name, O_RDONLY); if (fd < 0) { perror(file_name); return NULL; } if (fstat(fd, &st)) { perror("Could not determine file size"); close(fd); return NULL; } *size = st.st_size; buf = malloc(*size); if (!buf) { perror("Allocating memory failed"); close(fd); return NULL; } if (read(fd, buf, *size) != *size) { perror("File read failed"); close(fd); return NULL; } close(fd); return buf; } static void get_payload_info(char *bzimage, int *offset, int *size) { unsigned int system_offset; unsigned char setup_sectors; setup_sectors = bzimage[0x1f1] + 1; system_offset = setup_sectors * 512; *offset = system_offset + *((int*)&bzimage[0x248]); *size = *((int*)&bzimage[0x24c]); } static void update_payload_info(char* bzimage, int new_size) { int offset, size; get_payload_info(bzimage, &offset, &size); *((int*)&bzimage[0x24c]) = new_size; if (new_size < size) memset(bzimage + offset + new_size, 0, size - new_size); } struct zipper { unsigned char pattern[10]; int length; char *command; char *compress; }; struct zipper zippers[] = { {{0x7F,'E','L','F'}, 4, "cat", "cat"}, {{0x1F,0x8B}, 2, "gunzip", "gzip -n -f -9"}, {{0xFD,'7','z','X','Z',0}, 6, "unxz", "xz"}, {{'B','Z','h'},3, "bunzip2", "bzip2 -9"}, {{0xFF,'L','Z','M','A',0}, 6, "unlzma", "lzma -9"}, {{0xD3,'L','Z','O',0,'\r','\n',0x20,'\n'}, 9, "lzop -d", "lzop -9"} }; static struct zipper* get_zipper(char *p) { int i; for (i = 0; i < sizeof(zippers)/sizeof(struct zipper); i++) { if (memcmp(p, zippers[i].pattern, zippers[i].length) == 0) return &zippers[i]; } return NULL; } /* * This only works for x86 bzImage */ static void extract_vmlinux(char *bzimage, int bzimage_size, char **file, struct zipper **zipper) { int r; char src[15] = "vmlinux-XXXXXX"; char dest[15] = "vmlinux-XXXXXX"; char cmd[100]; int src_fd, dest_fd; int offset, size; struct zipper *z; /* TODO: verify that bzImage is supported */ get_payload_info(bzimage, &offset, &size); z = get_zipper(bzimage + offset); if (z == NULL) { err("Unable to determine the compression of vmlinux\n"); return; } src_fd = mkstemp(src); if (src_fd == -1) { perror("Could not create temp file"); return; } r = write(src_fd, bzimage + offset, size); if (r != size) { perror("Could not write vmlinux"); return; } dest_fd = mkstemp(dest); if (dest_fd == -1) { perror("Could not create temp file"); return; } snprintf(cmd, sizeof(cmd), "%s <%s >%s", z->command, src, dest); info("Executing: %s\n", cmd); r = system(cmd); if (r!=0) warn("Possible errors when extracting\n"); r = remove(src); if (r!=0) perror(src); *file = strdup(dest); *zipper = z; } static void repack_image(char *bzimage, int bzimage_size, char* vmlinux_file, struct zipper *z) { char tmp[15] = "vmlinux-XXXXXX"; char cmd[100]; int fd; struct stat st; int new_size; int r; int offset, size; get_payload_info(bzimage, &offset, &size); fd = mkstemp(tmp); if (fd == -1) { perror("Could not create temp file"); return; } snprintf(cmd, sizeof(cmd), "%s <%s >%s", z->compress, vmlinux_file, tmp); info("Executing: %s\n", cmd); r = system(cmd); if (r!=0) warn("Possible errors when compressing\n"); r = remove(vmlinux_file); if (r!=0) perror(vmlinux_file); if (fstat(fd, &st)) { perror("Could not determine file size"); close(fd); } new_size = st.st_size; if (new_size > size) { err("Increase in compressed size is not supported.\n"); err("Old size was %d, new size is %d\n", size, new_size); exit(EXIT_FAILURE); } r = read(fd, bzimage + offset, new_size); if (r != new_size) perror(tmp); r = remove(tmp); if (r!=0) perror(tmp); /* x86 specific patching of bzimage */ update_payload_info(bzimage, new_size); /* TODO: update CRC */ } static void fill_random(unsigned char *p, int n) { srand(0); int i; for (i = 0; i < n; i++) p[i] = rand(); } static void print_sym(Elf_Ehdr *hdr, struct sym *s) { info("sym: %s\n", s->name); info("addr: 0x%lx\n", s->address); info("size: %d\n", s->size); info("offset: 0x%lx\n", (unsigned long)s->offset); } static void print_usage(char *e) { printf("Usage: %s [-s ] -b -c \n", e); printf(" %s [-s ] -z -c \n", e); } int main(int argc, char **argv) { char *system_map_file = NULL; char *vmlinux_file = NULL; char *bzimage_file = NULL; char *cert_file = NULL; int vmlinux_size; int bzimage_size; int cert_size; Elf_Ehdr *hdr; char *cert; char *bzimage = NULL; struct zipper *z = NULL; FILE *system_map; unsigned long *lsize; int *used; int opt; Elf_Shdr *symtab = NULL; struct sym cert_sym, lsize_sym, used_sym; while ((opt = getopt(argc, argv, "b:z:c:s:")) != -1) { switch (opt) { case 's': system_map_file = optarg; break; case 'b': vmlinux_file = optarg; break; case 'z': bzimage_file = optarg; break; case 'c': cert_file = optarg; break; default: break; } } if (!cert_file || (!vmlinux_file && !bzimage_file) || (vmlinux_file && bzimage_file)) { print_usage(argv[0]); exit(EXIT_FAILURE); } cert = read_file(cert_file, &cert_size); if (!cert) exit(EXIT_FAILURE); if (bzimage_file) { bzimage = map_file(bzimage_file, &bzimage_size); if (!bzimage) exit(EXIT_FAILURE); extract_vmlinux(bzimage, bzimage_size, &vmlinux_file, &z); if (!vmlinux_file) exit(EXIT_FAILURE); } hdr = map_file(vmlinux_file, &vmlinux_size); if (!hdr) exit(EXIT_FAILURE); if (vmlinux_size < sizeof(*hdr)) { err("Invalid ELF file.\n"); exit(EXIT_FAILURE); } if ((hdr->e_ident[EI_MAG0] != ELFMAG0) || (hdr->e_ident[EI_MAG1] != ELFMAG1) || (hdr->e_ident[EI_MAG2] != ELFMAG2) || (hdr->e_ident[EI_MAG3] != ELFMAG3)) { err("Invalid ELF magic.\n"); exit(EXIT_FAILURE); } if (hdr->e_ident[EI_CLASS] != CURRENT_ELFCLASS) { err("ELF class mismatch.\n"); exit(EXIT_FAILURE); } if (hdr->e_ident[EI_DATA] != endianness()) { err("ELF endian mismatch.\n"); exit(EXIT_FAILURE); } if (hdr->e_shoff > vmlinux_size) { err("Could not find section header.\n"); exit(EXIT_FAILURE); } symtab = get_symbol_table(hdr); if (!symtab) { warn("Could not find the symbol table.\n"); if (!system_map_file) { err("Please provide a System.map file.\n"); print_usage(argv[0]); exit(EXIT_FAILURE); } system_map = fopen(system_map_file, "r"); if (!system_map) { perror(system_map_file); exit(EXIT_FAILURE); } get_symbol_from_map(hdr, system_map, CERT_SYM, &cert_sym); get_symbol_from_map(hdr, system_map, USED_SYM, &used_sym); get_symbol_from_map(hdr, system_map, LSIZE_SYM, &lsize_sym); cert_sym.size = used_sym.address - cert_sym.address; } else { info("Symbol table found.\n"); if (system_map_file) warn("System.map is ignored.\n"); get_symbol_from_table(hdr, symtab, CERT_SYM, &cert_sym); get_symbol_from_table(hdr, symtab, USED_SYM, &used_sym); get_symbol_from_table(hdr, symtab, LSIZE_SYM, &lsize_sym); } if (!cert_sym.offset || !lsize_sym.offset || !used_sym.offset) exit(EXIT_FAILURE); print_sym(hdr, &cert_sym); print_sym(hdr, &used_sym); print_sym(hdr, &lsize_sym); lsize = (unsigned long *)lsize_sym.content; used = (int *)used_sym.content; if (cert_sym.size < cert_size) { err("Certificate is larger than the reserved area!\n"); exit(EXIT_FAILURE); } /* If the existing cert is the same, don't overwrite */ if (cert_size > 0 && cert_size == *used && strncmp(cert_sym.content, cert, cert_size) == 0) { warn("Certificate was already inserted.\n"); exit(EXIT_SUCCESS); } if (*used > 0) warn("Replacing previously inserted certificate.\n"); memcpy(cert_sym.content, cert, cert_size); if (cert_size < cert_sym.size) /* This makes the reserved space incompressable */ fill_random(cert_sym.content + cert_size, cert_sym.size - cert_size); *lsize = *lsize + cert_size - *used; *used = cert_size; info("Inserted the contents of %s into %lx.\n", cert_file, cert_sym.address); info("Used %d bytes out of %d bytes reserved.\n", *used, cert_sym.size); if (munmap(hdr, vmlinux_size) == -1) { perror(vmlinux_file); exit(EXIT_FAILURE); } if (bzimage) { repack_image(bzimage, bzimage_size, vmlinux_file, z); } exit(EXIT_SUCCESS); }