{"id":8716,"date":"2017-12-18T22:28:18","date_gmt":"2017-12-18T21:28:18","guid":{"rendered":"http:\/\/arumel.com\/?p=8716"},"modified":"2017-12-18T22:28:18","modified_gmt":"2017-12-18T21:28:18","slug":"encriptar-disco-duro-luks","status":"publish","type":"post","link":"https:\/\/arumel.com\/es\/encriptar-disco-duro-luks\/","title":{"rendered":"como encriptar un disco duro con luks"},"content":{"rendered":"<h1>Como encryptar nuestro disco duro externo con luks<\/h1>\n<h3>(Ubuntu 16.04, luks, ext4, ssd)<\/h3>\n<p>&nbsp;<\/p>\n<p>Lo primero es eliminar la partici\u00f3n que tra\u00eda el disco duro:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true \" title=\"remove partition\">sergio@sergio-pc:~$ sudo -i\r\n[sudo] password for sergio: \r\n\r\nroot@sergio-pc:~# fdisk \/dev\/sdb\r\n\r\nWelcome to fdisk (util-linux 2.27.1).\r\nChanges will remain in memory only, until you decide to write them.\r\nBe careful before using the write command.\r\n\r\n\r\nOrden (m para obtener ayuda): p\r\nDisk \/dev\/sdb: 477 GiB, 512110190592 bytes, 1000215216 sectors\r\nUnits: sectors of 1 * 512 = 512 bytes\r\nSector size (logical\/physical): 512 bytes \/ 512 bytes\r\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes\r\nDisklabel type: dos\r\nDisk identifier: 0x00000000\r\n\r\nDisposit.  Inicio Start      Final   Sectores  Size Id Tipo\r\n\/dev\/sdb1  *       2048 1000214527 1000212480  477G  7 HPFS\/NTFS\/exFAT\r\n\r\nOrden (m para obtener ayuda): d\r\nSelected partition 1\r\nLa partici\u00f3n 1 ha sido eliminada.<\/pre>\n<p>&nbsp;<\/p>\n<p>Sin salir del fdisk, creamos una partici\u00f3n con el tama\u00f1o completo por defecto:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true \" title=\"create partition\">Orden (m para obtener ayuda): p\r\nDisk \/dev\/sdb: 477 GiB, 512110190592 bytes, 1000215216 sectors\r\nUnits: sectors of 1 * 512 = 512 bytes\r\nSector size (logical\/physical): 512 bytes \/ 512 bytes\r\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes\r\nDisklabel type: dos\r\nDisk identifier: 0x00000000\r\n\r\nOrden (m para obtener ayuda): n\r\nPartition type\r\n   p   primary (0 primary, 0 extended, 4 free)\r\n   e   extended (container for logical partitions)\r\nSelect (default p): \r\n\r\nUsing default response p.\r\nN\u00famero de partici\u00f3n (1-4, default 1): \r\nFirst sector (2048-1000215215, default 2048): \r\nLast sector, +sectors or +size{K,M,G,T,P} (2048-1000215215, default 1000215215): \r\n\r\nCreated a new partition 1 of type 'Linux' and of size 477 GiB.\r\n\r\nOrden (m para obtener ayuda): p\r\nDisk \/dev\/sdb: 477 GiB, 512110190592 bytes, 1000215216 sectors\r\nUnits: sectors of 1 * 512 = 512 bytes\r\nSector size (logical\/physical): 512 bytes \/ 512 bytes\r\nI\/O size (minimum\/optimal): 512 bytes \/ 512 bytes\r\nDisklabel type: dos\r\nDisk identifier: 0x00000000\r\n\r\nDisposit.  Inicio Start      Final   Sectores  Size Id Tipo\r\n\/dev\/sdb1          2048 1000215215 1000213168  477G 83 Linux\r\n\r\nOrden (m para obtener ayuda): w\r\nThe partition table has been altered.\r\nCalling ioctl() to re-read partition table.\r\nSyncing disks.<\/pre>\n<p>&nbsp;<\/p>\n<p>Por curiosidad, lanzamos una prueba de rendimiento de la partici\u00f3n antes de encryptar (luego haremos otra prueba tras la encriptaci\u00f3n):<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true\" title=\"benchmark\">root@sergio-pc:~# hdparm -Tt \/dev\/sdb1\r\n\r\n\/dev\/sdb1:\r\n Timing cached reads:   14308 MB in  2.00 seconds = 7159.02 MB\/sec\r\n Timing buffered disk reads: 1244 MB in  3.00 seconds = 414.36 MB\/sec\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>Encriptamos nuestra nueva partici\u00f3n:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true \" title=\"encrypt\">root@sergio-pc:~# cryptsetup luksFormat -c aes-xts-plain64:sha512 -h sha512 \/dev\/sdb1\r\n\r\nWARNING!\r\n========\r\nSobrescribir\u00e1 los datos en \/dev\/sdb1 de forma irrevocable.\r\n\r\nAre you sure? (Type uppercase yes): YES\r\nIntroduzca frase contrase\u00f1a: \r\nVerificar frase de paso: \r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>Abrimos el nuevo disposito creado para poder utilizarlo:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default decode:true \" title=\"open\">root@sergio-pc:~# cryptsetup luksOpen \/dev\/sdb1 backup-500ssd\r\nIntroduzca una contrase\u00f1a para \/dev\/sdb1: \r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>Comprobamos el UUID del dispositivo para a\u00f1adirlo al crypttab y que arranque autom\u00e1ticamente cuando inicie la m\u00e1quina:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true \" title=\"crypttab\">root@sergio-pc:~# blkid\r\n[...]\r\n\/dev\/sdb1: UUID=\"22984991-9ef2-4bd9-9c3d-1bfe03e91021\" ENGINE=\"crypto_LUKS\"\r\n\r\nroot@sergio-pc:~# vi \/etc\/crypttab \r\n\r\nroot@sergio-pc:~# cat \/etc\/crypttab\r\n[...]\r\nbackup-500ssd   UUID=22984991-9ef2-4bd9-9c3d-1bfe03e91021       none    luks\r\n\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>Creamos los vol\u00famenes para utilizar posteriormente:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true\" title=\"volume\">root@sergio-pc:~# pvcreate \/dev\/mapper\/backup-500ssd \r\n  Physical volume \"\/dev\/mapper\/backup-500ssd\" successfully created\r\n\r\nroot@sergio-pc:~# vgcreate vgbackup-500ssd \/dev\/mapper\/backup-500ssd\r\n  Volume group \"vgbackup-500ssd\" successfully created\r\n\r\nroot@sergio-pc:~# lvcreate -C n -l 100%FREE -n lvbackup-500ssd vgbackup-500ssd \/dev\/mapper\/backup-500ssd\r\n  Logical volume \"lvbackup-500ssd\" created.\r\n\r\nroot@sergio-pc:~# pvs\r\n  PV                        VG              Fmt  Attr PSize   PFree\r\n  \/dev\/mapper\/backup-500ssd vgbackup-500ssd lvm2 a--  476,93g    0 \r\n [...]\r\n\r\nroot@sergio-pc:~# vgs\r\n  VG              #PV #LV #SN Attr   VSize   VFree\r\n  vgbackup-500ssd   1   1   0 wz--n- 476,93g    0 \r\n [...]\r\n\r\nroot@sergio-pc:~# lvs\r\n  LV              VG              Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert\r\n  lvbackup-500ssd vgbackup-500ssd -wi-a----- 476,93g                                                    \r\n  [...]                                                  \r\n\r\nroot@sergio-pc:~# lvscan\r\n  ACTIVE            '\/dev\/vgbackup-500ssd\/lvbackup-500ssd' [476,93 GiB] inherit\r\n [...]\r\n\r\nroot@sergio-pc:~# mkfs.ext4 \/dev\/mapper\/vgbackup--500ssd-lvbackup--500ssd \r\nmke2fs 1.42.13 (17-May-2015)\r\nSe est\u00e1 creando un sistema de ficheros con 125025280 bloques de 4k y 31260672 nodos-i\r\nUUID del sistema de ficheros: c0c0b651-5367-437c-bde2-09033a54d2d5\r\nRespaldo del superbloque guardado en los bloques: \r\n        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, \r\n        4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, \r\n        102400000\r\n\r\nReservando las tablas de grupo: hecho                           \r\nEscribiendo las tablas de nodos-i: hecho                           \r\nCreando el fichero de transacciones (32768 bloques): hecho\r\nEscribiendo superbloques y la informaci\u00f3n contable del sistema de ficheros: hecho    \r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>Hacemos la prueba de rendimiento tras la encriptaci\u00f3n y vemos que hemos perdido un poco:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true\" title=\"benchmark\">root@sergio-pc:~# hdparm -Tt \/dev\/mapper\/vgbackup--500ssd-lvbackup--500ssd \r\n\r\n\/dev\/mapper\/vgbackup--500ssd-lvbackup--500ssd:\r\n Timing cached reads:   12250 MB in  2.00 seconds = 6128.36 MB\/sec\r\n Timing buffered disk reads: 956 MB in  3.00 seconds = 318.35 MB\/sec\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>Si tenemos inter\u00e9s en ver otros rendimientos con otros tipos de encriptaciones, podemos ejecutar:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true \" title=\"cryptsetup benchmark\">root@ubuntu:~# cryptsetup benchmark\r\n# Tests are approximate using memory only (no storage IO).\r\nPBKDF2-sha1      1087734 iterations per second\r\nPBKDF2-sha256     728177 iterations per second\r\nPBKDF2-sha512     601247 iterations per second\r\nPBKDF2-ripemd160  675628 iterations per second\r\nPBKDF2-whirlpool  248242 iterations per second\r\n#  Algorithm | Key |  Encryption |  Decryption\r\n     aes-cbc   128b   606.6 MiB\/s  2632.3 MiB\/s\r\n serpent-cbc   128b    80.7 MiB\/s   519.2 MiB\/s\r\n twofish-cbc   128b   181.4 MiB\/s   305.1 MiB\/s\r\n     aes-cbc   256b   452.6 MiB\/s  2019.5 MiB\/s\r\n serpent-cbc   256b    83.2 MiB\/s   525.4 MiB\/s\r\n twofish-cbc   256b   184.4 MiB\/s   336.0 MiB\/s\r\n     aes-xts   256b  2230.1 MiB\/s  2242.8 MiB\/s\r\n serpent-xts   256b   522.8 MiB\/s   502.2 MiB\/s\r\n twofish-xts   256b   325.8 MiB\/s   332.0 MiB\/s\r\n     aes-xts   512b  1723.5 MiB\/s  1680.5 MiB\/s\r\n serpent-xts   512b   523.5 MiB\/s   506.4 MiB\/s\r\n twofish-xts   512b   326.9 MiB\/s   331.7 MiB\/s\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>Comprobamos que ya tenemos montada la partici\u00f3n:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true \" title=\"mount\">root@sergio-pc:~# mount\r\n[...]\r\n\/dev\/mapper\/vgbackup--500ssd-lvbackup--500ssd on \/media\/sergio\/c0c0b651-5367-437c-bde2-09033a54d2d5 type ext4 (rw,nosuid,nodev,relatime,data=ordered,uhelper=udisks2)<\/pre>\n<p>&nbsp;<\/p>\n<p>Le damos permiso a nuestro usuario de sistema operativo:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true\" title=\"chown\">root@sergio-pc:~# cd \/media\/sergio\/\r\n\r\nroot@sergio-pc:\/media\/sergio# ls -lrt\r\ntotal 32\r\ndrwxr-xr-x  3 root   root    4096 dic 18 12:54 c0c0b651-5367-437c-bde2-09033a54d2d5\r\ndrwxrwx--- 13 sergio sergio  4096 dic 18 15:22 2TB\r\ndrwxrwxrwx  1 sergio sergio 24576 dic 18 15:42 CELVIN Drive\r\n\r\nroot@sergio-pc:\/media\/sergio# chown -R sergio:sergio c0c0b651-5367-437c-bde2-09033a54d2d5\/\r\n\r\nroot@sergio-pc:\/media\/sergio# ls -l\r\ntotal 32\r\ndrwxrwx--- 13 sergio sergio 4096 dic 18 15:22 2TB\r\ndrwxr-xr-x 3 sergio sergio 4096 dic 18 12:54 c0c0b651-5367-437c-bde2-09033a54d2d5\r\ndrwxrwxrwx 1 sergio sergio 24576 dic 18 15:42 CELVIN Drive\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>Comprobamos que aparece un nombre muy largo y poco descriptivo, lo cambiamos:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true \" title=\"change name\">root@sergio-pc:\/media\/sergio# e2label \/dev\/mapper\/vgbackup--500ssd-lvbackup--500ssd backup-500ssd<\/pre>\n<p>&nbsp;<\/p>\n<p>Desmontamos el volumen y lo volvemos a montar:<\/p>\n<pre class=\"theme:familiar font:ubuntu-mono toolbar-overlay:false lang:default highlight:0 decode:true \">root@sergio-pc:~# df -h\r\nS.ficheros                                    Tama\u00f1o Usados  Disp Uso% Montado en\r\n[...]\r\n\/dev\/mapper\/vgbackup--500ssd-lvbackup--500ssd   470G    82G  364G  19% \/media\/sergio\/backup-500ssd\r\n\r\nroot@sergio-pc:~# cd \/media\/sergio\/\r\nroot@sergio-pc:\/media\/sergio# ls\r\n2TB  backup-500ssd<\/pre>\n<p>&nbsp;<\/p>\n<p>Ya lo tenemos listo para usar \ud83d\ude42<\/p>\n<p>&nbsp;<\/p>\n<p>A\u00f1adiendo valor con <a href=\"http:\/\/www.arumel.com\">Arumel<\/a>!!<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Como encryptar nuestro disco duro externo con luks (Ubuntu 16.04, luks, ext4, ssd) &nbsp; Lo primero es eliminar la partici\u00f3n que tra\u00eda el disco duro: sergio@sergio-pc:~$ sudo -i [sudo] password for sergio: root@sergio-pc:~# fdisk \/dev\/sdb Welcome to fdisk (util-linux 2.27.1). Changes will remain in memory only, until you decide to write them. Be careful before [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":7824,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[262,255,260,56,259,261],"class_list":["post-8716","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sin-categorizar","tag-disco","tag-disk","tag-encrypt","tag-linux","tag-luks","tag-ssd"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>como encriptar un disco duro con luks - Arumel<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/arumel.com\/es\/encriptar-disco-duro-luks\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"como encriptar un disco duro con luks - Arumel\" \/>\n<meta property=\"og:description\" content=\"Como encryptar nuestro disco duro externo con luks (Ubuntu 16.04, luks, ext4, ssd) &nbsp; Lo primero es eliminar la partici\u00f3n que tra\u00eda el disco duro: sergio@sergio-pc:~$ sudo -i [sudo] password for sergio: root@sergio-pc:~# fdisk \/dev\/sdb Welcome to fdisk (util-linux 2.27.1). 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