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33 lines
1.1 KiB
33 lines
1.1 KiB
#!/bin/sh |
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# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*- |
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# ex: ts=4 sw=4 sts=0 et filetype=sh |
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command -v ask_for_password >/dev/null || . /lib/dracut-crypt-lib.sh |
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# gpg_decrypt mnt_point keypath keydev device |
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# |
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# Decrypts encrypted symmetrically key to standard output. |
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# |
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# mnt_point - mount point where <keydev> is already mounted |
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# keypath - GPG encrypted key path relative to <mnt_point> |
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# keydev - device on which key resides; only to display in prompt |
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# device - device to be opened by cryptsetup; only to display in prompt |
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gpg_decrypt() { |
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local mntp="$1" |
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local keypath="$2" |
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local keydev="$3" |
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local device="$4" |
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local gpghome=/tmp/gnupg |
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local opts="--homedir $gpghome --no-mdc-warning --skip-verify --quiet" |
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opts="$opts --logger-file /dev/null --batch --no-tty --passphrase-fd 0" |
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mkdir -m 0700 -p "$gpghome" |
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ask_for_password \ |
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--cmd "gpg $opts --decrypt $mntp/$keypath" \ |
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--prompt "Password ($keypath on $keydev for $device)" \ |
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--tries 3 --tty-echo-off |
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rm -rf -- "$gpghome" |
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}
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