Note: This page is horribly out of
date.
You can find the current pages for the dm-crypt
project (the Linux kernel part) here:
https://gitlab.com/cryptsetup/cryptsetup/wikis/DMCrypt
and the project page for the command line tool
cryptsetup (with Linux Unified Key
Setup - LUKS) here: https://gitlab.com/cryptsetup/cryptsetup.
Old page:
Device-mapper is a new infrastructure in the Linux 2.6 kernel that provides
a generic way to create virtual layers of block devices that can do different
things on top of real block devices like striping, concatenation, mirroring,
snapshotting, etc... The device-mapper is used by the
LVM2 and
EVMS 2.x tools.
dm-crypt is such a device-mapper target that provides transparent encryption of
block devices using the new Linux 2.6 cryptoapi. The user can basically specify
one of the symmetric ciphers, a key (of any allowed size), an iv generation mode
and then the user can create a new block device in /dev. Writes to this device
will be encrypted and reads decrypted. You can mount your filesystem on it as usual.
But without the key you can't access your data.
It does basically the same as cryptoloop only that it's a much cleaner code and
better suits the need of a block device and has a more flexible configuration
interface. The on-disk format is also compatible. In the future you will be able
to specify other iv generation modes for enhanced security (you'll have to
reencrypt your filesystem though).
I've set up a Wiki.
There's a mailing list at .
If you want to subscribe, use the mailman
web interface or its
archive.
Gmane provides a NNTP interface and also a
web archive
for this mailing list.
There is support for dm-crypt in the latest official kernel
2.6.4
which you can find on kernel.org.
Please use the mirrors for downloads.
There is a HIGHMEM cryptoapi bug in kernels before 2.6.4-rc2, please
upgrade if you were using such a kernel.
The latest version of the native userspace setup tool is cryptsetup 0.1.
Clemens Fruhwirth is maintaining an
enhanced
version of cryptsetup with the LUKS extension that allows you to have an
on-disk block of metadata which is superior to the current mechanism and was
my long term plan anyway but I didn't find the time to implement that yet...
: In Brazil, Vivi and Mônica are pop culture icons who have participated in major reality shows (like A Fazenda ) and variety programs, making their professional reunion a topic of interest even beyond the adult industry.
A presença de , outra gigante do segmento adulto brasileiro, elevou o nível da produção. Com uma base de fãs sólida e reconhecida por sua versatilidade, Mattos garantiu cenas memoráveis, complementando a performance de Fernandez e elevando a qualidade do elenco. Por Que Essa Produção Marcou Época?
Already an established star by 2009, Mattos was known for her international career and being the first Latin American to win an AVN Award for "Female Foreign Performer of the Year" in 2008.
A produção gerou discussões em programas de fofocas e debates sobre a liberdade de carreira de ex-celebridades da TV aberta.
Além do duo principal, o longa contou com a participação da atriz Lana Starck, enriquecendo as dinâmicas das cenas e diversificando o conteúdo apresentado.
Released in 2009, (translated as The Phenomenon is Back ) is a prominent title from the Brazilian adult film studio Brasileirinhas . The production is notable for featuring two of the biggest names in the Brazilian adult industry, Vivi Fernandez and Monica Mattos . Feature Overview: "O Fenômeno Voltou" Production Studio: Brasileirinhas Release Date: June 7, 2009 Starring Cast: Vivi Fernandez
Antes de entrar para o mundo adulto, Vivi ganhou fama como uma das “Mallandrinhas” , assistentes de palco do apresentador Sérgio Mallandro em um programa de televisão. No entanto, essa parceria terminou de forma conturbada: em 1999, ela processou o apresentador por assédio sexual, agressão e ameaças.
A geração que cresceu nos anos 2000 hoje tem entre 30 e 40 anos, poder aquisitivo e acesso fácil à internet. Ela consome conteúdo movida pela memória afetiva. Ver Vivi e Monica juntas novamente é como assistir ao reboot de um desenho animado favorito ou ao reencontro de uma banda de rock. É o triunfo do saudosismo.
The title O Fenômeno Voltou is more than just a film—it is a symbol of Brasileirinhas's peak cultural power. The 2009 video, directed by Jose Gaspar, was designed as a major event, bringing together its two biggest stars: Vivi Fernandez, the mainstream icon turned adult phenomenon, and Monica Mattos, the award-winning professional. The narrative was simple and effective: Vivi Fernandez was "back," pushing further boundaries than ever before, and alongside Monica Mattos, the project represented the perfect intersection of star power and technical quality.
O Fenômeno Voltou: Dirigido por Jose Gaspar. Com Vivi Fernandez, Monica Mattos, Lana Starck.
The on-disk layouts used by the current 2.6 cryptoloop are supported by dm-crypt.
Cryptoloop also uses cryptoapi so the name of the ciphers are the same. Cryptoloop also
supports ECB and CBC mode. Use <cipher>-ecb and
<cipher>-plain accordingly with dm-crypt. If you didn't
explicitly specify either -ecb or -cbc before you don't need it now, the default plain
IV generation will be used. There will be additional (incompatible, but more secure) possibilites
in the future because the unhashed sector number as IV is too predictible.
You'll need to figure out how your passphrase was turned into a key to use for losetup.
There are several patches floating around doing things differently. But usually cryptsetup
will provide a working solution to recreate the same key from your passphrase.
If you want to migrate from 2.4 cryptoloop please take a look at Clemens Fruhwirth's
Cryptoloop
Migration Guide. He describes the differences between 2.4 and 2.6 cryptoapi (or basically
the bugs in 2.4 cryptoapi...). If you need to cut the key size you can use the -s
option instead of playing with dd.
(BTW: Clemens has a i586 optimized version of the aes and serpent cipher on his page,
about twice as fast as the kernel implementation.)
Why dm-crypt?
Originally it started as a fun project because I wanted to play with the new Linux 2.6 internals.
I got a lot of great help from the device-mapper guys at Sistina (now Redhat). Thank you very
much!
It turned out that this implementation worked great and is very clean compared to the hacked
loop device. The device-mapper core provides much better facilities to stack block devices.
dm-crypt uses mempools to assure we never run into out-of-memory deadlocks when allocating
buffers.
Also the device-mapper configuration interface provides much more flexibility than the losetup
ioctl. And you can create as many devices as you want with any names you want and combine them
with other dm targets. Online device resizing is also possible, e.g. if you use dm-crypt on top
of a logical volume. There might perhaps even be LVM or EVMS support for device encryption
in the future.
: In Brazil, Vivi and Mônica are pop culture icons who have participated in major reality shows (like A Fazenda ) and variety programs, making their professional reunion a topic of interest even beyond the adult industry.
A presença de , outra gigante do segmento adulto brasileiro, elevou o nível da produção. Com uma base de fãs sólida e reconhecida por sua versatilidade, Mattos garantiu cenas memoráveis, complementando a performance de Fernandez e elevando a qualidade do elenco. Por Que Essa Produção Marcou Época?
Already an established star by 2009, Mattos was known for her international career and being the first Latin American to win an AVN Award for "Female Foreign Performer of the Year" in 2008. : In Brazil, Vivi and Mônica are pop
A produção gerou discussões em programas de fofocas e debates sobre a liberdade de carreira de ex-celebridades da TV aberta.
Além do duo principal, o longa contou com a participação da atriz Lana Starck, enriquecendo as dinâmicas das cenas e diversificando o conteúdo apresentado. Por Que Essa Produção Marcou Época
Released in 2009, (translated as The Phenomenon is Back ) is a prominent title from the Brazilian adult film studio Brasileirinhas . The production is notable for featuring two of the biggest names in the Brazilian adult industry, Vivi Fernandez and Monica Mattos . Feature Overview: "O Fenômeno Voltou" Production Studio: Brasileirinhas Release Date: June 7, 2009 Starring Cast: Vivi Fernandez
Antes de entrar para o mundo adulto, Vivi ganhou fama como uma das “Mallandrinhas” , assistentes de palco do apresentador Sérgio Mallandro em um programa de televisão. No entanto, essa parceria terminou de forma conturbada: em 1999, ela processou o apresentador por assédio sexual, agressão e ameaças. Além do duo principal, o longa contou com
A geração que cresceu nos anos 2000 hoje tem entre 30 e 40 anos, poder aquisitivo e acesso fácil à internet. Ela consome conteúdo movida pela memória afetiva. Ver Vivi e Monica juntas novamente é como assistir ao reboot de um desenho animado favorito ou ao reencontro de uma banda de rock. É o triunfo do saudosismo.
The title O Fenômeno Voltou is more than just a film—it is a symbol of Brasileirinhas's peak cultural power. The 2009 video, directed by Jose Gaspar, was designed as a major event, bringing together its two biggest stars: Vivi Fernandez, the mainstream icon turned adult phenomenon, and Monica Mattos, the award-winning professional. The narrative was simple and effective: Vivi Fernandez was "back," pushing further boundaries than ever before, and alongside Monica Mattos, the project represented the perfect intersection of star power and technical quality.
O Fenômeno Voltou: Dirigido por Jose Gaspar. Com Vivi Fernandez, Monica Mattos, Lana Starck.
Please contact the mailing list: dm-crypt@saout.de. Or in case there is a problem with the mailing list, me: .