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| -rw-r--r-- | Documentation/device-mapper/dm-crypt.rst (renamed from Documentation/device-mapper/dm-crypt.txt) | 61 |
1 files changed, 36 insertions, 25 deletions
diff --git a/Documentation/device-mapper/dm-crypt.txt b/Documentation/device-mapper/dm-crypt.rst index 3b3e1de21c9c..8f4a3f889d43 100644 --- a/Documentation/device-mapper/dm-crypt.txt +++ b/Documentation/device-mapper/dm-crypt.rst @@ -1,5 +1,6 @@ +======== dm-crypt -========= +======== Device-Mapper's "crypt" target provides transparent encryption of block devices using the kernel crypto API. @@ -7,15 +8,20 @@ using the kernel crypto API. For a more detailed description of supported parameters see: https://gitlab.com/cryptsetup/cryptsetup/wikis/DMCrypt -Parameters: <cipher> <key> <iv_offset> <device path> \ +Parameters:: + + <cipher> <key> <iv_offset> <device path> \ <offset> [<#opt_params> <opt_params>] <cipher> Encryption cipher, encryption mode and Initial Vector (IV) generator. - The cipher specifications format is: + The cipher specifications format is:: + cipher[:keycount]-chainmode-ivmode[:ivopts] - Examples: + + Examples:: + aes-cbc-essiv:sha256 aes-xts-plain64 serpent-xts-plain64 @@ -25,12 +31,17 @@ Parameters: <cipher> <key> <iv_offset> <device path> \ as for the first format type. This format is mainly used for specification of authenticated modes. - The crypto API cipher specifications format is: + The crypto API cipher specifications format is:: + capi:cipher_api_spec-ivmode[:ivopts] - Examples: + + Examples:: + capi:cbc(aes)-essiv:sha256 capi:xts(aes)-plain64 - Examples of authenticated modes: + + Examples of authenticated modes:: + capi:gcm(aes)-random capi:authenc(hmac(sha256),xts(aes))-random capi:rfc7539(chacha20,poly1305)-random @@ -142,21 +153,21 @@ LUKS (Linux Unified Key Setup) is now the preferred way to set up disk encryption with dm-crypt using the 'cryptsetup' utility, see https://gitlab.com/cryptsetup/cryptsetup -[[ -#!/bin/sh -# Create a crypt device using dmsetup -dmsetup create crypt1 --table "0 `blockdev --getsz $1` crypt aes-cbc-essiv:sha256 babebabebabebabebabebabebabebabe 0 $1 0" -]] - -[[ -#!/bin/sh -# Create a crypt device using dmsetup when encryption key is stored in keyring service -dmsetup create crypt2 --table "0 `blockdev --getsize $1` crypt aes-cbc-essiv:sha256 :32:logon:my_prefix:my_key 0 $1 0" -]] - -[[ -#!/bin/sh -# Create a crypt device using cryptsetup and LUKS header with default cipher -cryptsetup luksFormat $1 -cryptsetup luksOpen $1 crypt1 -]] +:: + + #!/bin/sh + # Create a crypt device using dmsetup + dmsetup create crypt1 --table "0 `blockdev --getsz $1` crypt aes-cbc-essiv:sha256 babebabebabebabebabebabebabebabe 0 $1 0" + +:: + + #!/bin/sh + # Create a crypt device using dmsetup when encryption key is stored in keyring service + dmsetup create crypt2 --table "0 `blockdev --getsize $1` crypt aes-cbc-essiv:sha256 :32:logon:my_prefix:my_key 0 $1 0" + +:: + + #!/bin/sh + # Create a crypt device using cryptsetup and LUKS header with default cipher + cryptsetup luksFormat $1 + cryptsetup luksOpen $1 crypt1 |