Bandie/grub2-signing-extension
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grub2-signing-extension/sbin/grub2-sign

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First commit and release.
2015-03-16 19:38:36 +00:00
#!/bin/bash
# grub2-sign
# Signs everything important in /boot. Depends on grub2-verify.
# Author: Bandie Kojote
# Licence: GNU-GPLv3
Comments and words.
2015-03-17 06:23:23 +00:00
# Running grub2-verify first to prevent double signing
Follow best practices for bash - Use native bash math where doing so improves readability. - Avoid illegal exit status codes (666 in impossible scenario). - Avoid useless use of cat (`cat foo | bar` vs the more efficient `bar <foo`). - Avoid needless echo pipelines (`echo foo | bar` vs `bar <<<"$foo"`). - Never use a for loop to iterate over output from `find`; `for` loops depend on string-splitting, which is only available with globbing behavior. See http://mywiki.wooledge.org/DontReadLinesWithFor - Use `read -s` to silence feedback rather than playing around with `stty`. - Use `tput` to retrieve color codes correct for the current terminal rather than assuming a terminal compatible with ANSI color codes. - Use a expression compatible with BSD `tr` in "passphrase-shredding" code. (BTW, I very much doubt that this code actually does any good; it's not a reasonable expectation that a new string assigned to a variable will actually be placed at the same location in memory). - Implementations of `echo` which do anything other than print `-e` on output when `echo -e` is run are nonconformant with the POSIX spec for echo. Similarly, `echo -n` behavior is not defined by the standard. Avoid relying on either of these. (See http://pubs.opengroup.org/onlinepubs/009604599/utilities/echo.html, particularly the APPLICATION USAGE section). - Always quote expansions to prevent string-splitting and glob-expansion (`"$i"`, not `$i`). - Avoid `some_command; if [ $? -eq 0 ]; then` when `if some_command; then` can be used instead.
2015-12-30 21:32:46 +00:00
echo "Running grub2-verify to check if everything is unsigned..." >&2
First commit and release.
2015-03-16 19:38:36 +00:00
grub2-verify
Follow best practices for bash - Use native bash math where doing so improves readability. - Avoid illegal exit status codes (666 in impossible scenario). - Avoid useless use of cat (`cat foo | bar` vs the more efficient `bar <foo`). - Avoid needless echo pipelines (`echo foo | bar` vs `bar <<<"$foo"`). - Never use a for loop to iterate over output from `find`; `for` loops depend on string-splitting, which is only available with globbing behavior. See http://mywiki.wooledge.org/DontReadLinesWithFor - Use `read -s` to silence feedback rather than playing around with `stty`. - Use `tput` to retrieve color codes correct for the current terminal rather than assuming a terminal compatible with ANSI color codes. - Use a expression compatible with BSD `tr` in "passphrase-shredding" code. (BTW, I very much doubt that this code actually does any good; it's not a reasonable expectation that a new string assigned to a variable will actually be placed at the same location in memory). - Implementations of `echo` which do anything other than print `-e` on output when `echo -e` is run are nonconformant with the POSIX spec for echo. Similarly, `echo -n` behavior is not defined by the standard. Avoid relying on either of these. (See http://pubs.opengroup.org/onlinepubs/009604599/utilities/echo.html, particularly the APPLICATION USAGE section). - Always quote expansions to prevent string-splitting and glob-expansion (`"$i"`, not `$i`). - Avoid `some_command; if [ $? -eq 0 ]; then` when `if some_command; then` can be used instead.
2015-12-30 21:32:46 +00:00
if (( $? < 2 )); then
echo "Run grub2-unsign first." >&2
First commit and release.
2015-03-16 19:38:36 +00:00
exit 1
fi
Comments and words.
2015-03-17 06:23:23 +00:00
# Ask for passphrase
Follow best practices for bash - Use native bash math where doing so improves readability. - Avoid illegal exit status codes (666 in impossible scenario). - Avoid useless use of cat (`cat foo | bar` vs the more efficient `bar <foo`). - Avoid needless echo pipelines (`echo foo | bar` vs `bar <<<"$foo"`). - Never use a for loop to iterate over output from `find`; `for` loops depend on string-splitting, which is only available with globbing behavior. See http://mywiki.wooledge.org/DontReadLinesWithFor - Use `read -s` to silence feedback rather than playing around with `stty`. - Use `tput` to retrieve color codes correct for the current terminal rather than assuming a terminal compatible with ANSI color codes. - Use a expression compatible with BSD `tr` in "passphrase-shredding" code. (BTW, I very much doubt that this code actually does any good; it's not a reasonable expectation that a new string assigned to a variable will actually be placed at the same location in memory). - Implementations of `echo` which do anything other than print `-e` on output when `echo -e` is run are nonconformant with the POSIX spec for echo. Similarly, `echo -n` behavior is not defined by the standard. Avoid relying on either of these. (See http://pubs.opengroup.org/onlinepubs/009604599/utilities/echo.html, particularly the APPLICATION USAGE section). - Always quote expansions to prevent string-splitting and glob-expansion (`"$i"`, not `$i`). - Avoid `some_command; if [ $? -eq 0 ]; then` when `if some_command; then` can be used instead.
2015-12-30 21:32:46 +00:00
IFS= read -r -s -p 'Passphrase: ' pp
Comments and words.
2015-03-17 06:23:23 +00:00
Follow best practices for bash - Use native bash math where doing so improves readability. - Avoid illegal exit status codes (666 in impossible scenario). - Avoid useless use of cat (`cat foo | bar` vs the more efficient `bar <foo`). - Avoid needless echo pipelines (`echo foo | bar` vs `bar <<<"$foo"`). - Never use a for loop to iterate over output from `find`; `for` loops depend on string-splitting, which is only available with globbing behavior. See http://mywiki.wooledge.org/DontReadLinesWithFor - Use `read -s` to silence feedback rather than playing around with `stty`. - Use `tput` to retrieve color codes correct for the current terminal rather than assuming a terminal compatible with ANSI color codes. - Use a expression compatible with BSD `tr` in "passphrase-shredding" code. (BTW, I very much doubt that this code actually does any good; it's not a reasonable expectation that a new string assigned to a variable will actually be placed at the same location in memory). - Implementations of `echo` which do anything other than print `-e` on output when `echo -e` is run are nonconformant with the POSIX spec for echo. Similarly, `echo -n` behavior is not defined by the standard. Avoid relying on either of these. (See http://pubs.opengroup.org/onlinepubs/009604599/utilities/echo.html, particularly the APPLICATION USAGE section). - Always quote expansions to prevent string-splitting and glob-expansion (`"$i"`, not `$i`). - Avoid `some_command; if [ $? -eq 0 ]; then` when `if some_command; then` can be used instead.
2015-12-30 21:32:46 +00:00
# build a find command line matching relevant filenames
name_patterns=(
grubenv # fixed names
'*.'{cfg,lst,mod,asc,pf2} # names with interesting extensions
{vmlinuz,initrd}'*' # names with interesting prefixes
)
find_args=( '-false' )
for pattern in "${name_patterns[@]}"; do find_args+=( '-or' '-name' "$pattern" ); done
Comments and words.
2015-03-17 06:23:23 +00:00
# Find GRUB2 datas
Follow best practices for bash - Use native bash math where doing so improves readability. - Avoid illegal exit status codes (666 in impossible scenario). - Avoid useless use of cat (`cat foo | bar` vs the more efficient `bar <foo`). - Avoid needless echo pipelines (`echo foo | bar` vs `bar <<<"$foo"`). - Never use a for loop to iterate over output from `find`; `for` loops depend on string-splitting, which is only available with globbing behavior. See http://mywiki.wooledge.org/DontReadLinesWithFor - Use `read -s` to silence feedback rather than playing around with `stty`. - Use `tput` to retrieve color codes correct for the current terminal rather than assuming a terminal compatible with ANSI color codes. - Use a expression compatible with BSD `tr` in "passphrase-shredding" code. (BTW, I very much doubt that this code actually does any good; it's not a reasonable expectation that a new string assigned to a variable will actually be placed at the same location in memory). - Implementations of `echo` which do anything other than print `-e` on output when `echo -e` is run are nonconformant with the POSIX spec for echo. Similarly, `echo -n` behavior is not defined by the standard. Avoid relying on either of these. (See http://pubs.opengroup.org/onlinepubs/009604599/utilities/echo.html, particularly the APPLICATION USAGE section). - Always quote expansions to prevent string-splitting and glob-expansion (`"$i"`, not `$i`). - Avoid `some_command; if [ $? -eq 0 ]; then` when `if some_command; then` can be used instead.
2015-12-30 21:32:46 +00:00
while IFS= read -r -d '' i; do
Comments and words.
2015-03-17 06:23:23 +00:00
# Signing
Follow best practices for bash - Use native bash math where doing so improves readability. - Avoid illegal exit status codes (666 in impossible scenario). - Avoid useless use of cat (`cat foo | bar` vs the more efficient `bar <foo`). - Avoid needless echo pipelines (`echo foo | bar` vs `bar <<<"$foo"`). - Never use a for loop to iterate over output from `find`; `for` loops depend on string-splitting, which is only available with globbing behavior. See http://mywiki.wooledge.org/DontReadLinesWithFor - Use `read -s` to silence feedback rather than playing around with `stty`. - Use `tput` to retrieve color codes correct for the current terminal rather than assuming a terminal compatible with ANSI color codes. - Use a expression compatible with BSD `tr` in "passphrase-shredding" code. (BTW, I very much doubt that this code actually does any good; it's not a reasonable expectation that a new string assigned to a variable will actually be placed at the same location in memory). - Implementations of `echo` which do anything other than print `-e` on output when `echo -e` is run are nonconformant with the POSIX spec for echo. Similarly, `echo -n` behavior is not defined by the standard. Avoid relying on either of these. (See http://pubs.opengroup.org/onlinepubs/009604599/utilities/echo.html, particularly the APPLICATION USAGE section). - Always quote expansions to prevent string-splitting and glob-expansion (`"$i"`, not `$i`). - Avoid `some_command; if [ $? -eq 0 ]; then` when `if some_command; then` can be used instead.
2015-12-30 21:32:46 +00:00
if gpg --batch --detach-sign --passphrase-fd 0 "$i" <<<"$pp"; then
echo "$i signed." >&2
First commit and release.
2015-03-16 19:38:36 +00:00
else
Follow best practices for bash - Use native bash math where doing so improves readability. - Avoid illegal exit status codes (666 in impossible scenario). - Avoid useless use of cat (`cat foo | bar` vs the more efficient `bar <foo`). - Avoid needless echo pipelines (`echo foo | bar` vs `bar <<<"$foo"`). - Never use a for loop to iterate over output from `find`; `for` loops depend on string-splitting, which is only available with globbing behavior. See http://mywiki.wooledge.org/DontReadLinesWithFor - Use `read -s` to silence feedback rather than playing around with `stty`. - Use `tput` to retrieve color codes correct for the current terminal rather than assuming a terminal compatible with ANSI color codes. - Use a expression compatible with BSD `tr` in "passphrase-shredding" code. (BTW, I very much doubt that this code actually does any good; it's not a reasonable expectation that a new string assigned to a variable will actually be placed at the same location in memory). - Implementations of `echo` which do anything other than print `-e` on output when `echo -e` is run are nonconformant with the POSIX spec for echo. Similarly, `echo -n` behavior is not defined by the standard. Avoid relying on either of these. (See http://pubs.opengroup.org/onlinepubs/009604599/utilities/echo.html, particularly the APPLICATION USAGE section). - Always quote expansions to prevent string-splitting and glob-expansion (`"$i"`, not `$i`). - Avoid `some_command; if [ $? -eq 0 ]; then` when `if some_command; then` can be used instead.
2015-12-30 21:32:46 +00:00
echo "ERROR!" >&2
First commit and release.
2015-03-16 19:38:36 +00:00
break
fi
Follow best practices for bash - Use native bash math where doing so improves readability. - Avoid illegal exit status codes (666 in impossible scenario). - Avoid useless use of cat (`cat foo | bar` vs the more efficient `bar <foo`). - Avoid needless echo pipelines (`echo foo | bar` vs `bar <<<"$foo"`). - Never use a for loop to iterate over output from `find`; `for` loops depend on string-splitting, which is only available with globbing behavior. See http://mywiki.wooledge.org/DontReadLinesWithFor - Use `read -s` to silence feedback rather than playing around with `stty`. - Use `tput` to retrieve color codes correct for the current terminal rather than assuming a terminal compatible with ANSI color codes. - Use a expression compatible with BSD `tr` in "passphrase-shredding" code. (BTW, I very much doubt that this code actually does any good; it's not a reasonable expectation that a new string assigned to a variable will actually be placed at the same location in memory). - Implementations of `echo` which do anything other than print `-e` on output when `echo -e` is run are nonconformant with the POSIX spec for echo. Similarly, `echo -n` behavior is not defined by the standard. Avoid relying on either of these. (See http://pubs.opengroup.org/onlinepubs/009604599/utilities/echo.html, particularly the APPLICATION USAGE section). - Always quote expansions to prevent string-splitting and glob-expansion (`"$i"`, not `$i`). - Avoid `some_command; if [ $? -eq 0 ]; then` when `if some_command; then` can be used instead.
2015-12-30 21:32:46 +00:00
done < <(find /boot '(' "${find_args[@]}" ')' '-print0' )
Additional exit codes added + better shredding
2015-03-17 06:54:03 +00:00
for corrected
2015-03-19 22:11:00 +00:00
# Shredding passphrase
Follow best practices for bash - Use native bash math where doing so improves readability. - Avoid illegal exit status codes (666 in impossible scenario). - Avoid useless use of cat (`cat foo | bar` vs the more efficient `bar <foo`). - Avoid needless echo pipelines (`echo foo | bar` vs `bar <<<"$foo"`). - Never use a for loop to iterate over output from `find`; `for` loops depend on string-splitting, which is only available with globbing behavior. See http://mywiki.wooledge.org/DontReadLinesWithFor - Use `read -s` to silence feedback rather than playing around with `stty`. - Use `tput` to retrieve color codes correct for the current terminal rather than assuming a terminal compatible with ANSI color codes. - Use a expression compatible with BSD `tr` in "passphrase-shredding" code. (BTW, I very much doubt that this code actually does any good; it's not a reasonable expectation that a new string assigned to a variable will actually be placed at the same location in memory). - Implementations of `echo` which do anything other than print `-e` on output when `echo -e` is run are nonconformant with the POSIX spec for echo. Similarly, `echo -n` behavior is not defined by the standard. Avoid relying on either of these. (See http://pubs.opengroup.org/onlinepubs/009604599/utilities/echo.html, particularly the APPLICATION USAGE section). - Always quote expansions to prevent string-splitting and glob-expansion (`"$i"`, not `$i`). - Avoid `some_command; if [ $? -eq 0 ]; then` when `if some_command; then` can be used instead.
2015-12-30 21:32:46 +00:00
if (( ${#pp} )); then
echo "Shredding passphrase..." >&2
for (( i=0; i<10; i++ )); do
pp=$(LC_ALL=C tr -cd '[:print:]' </dev/urandom | head -c ${#pp})
done
fi
Additional exit codes added + better shredding
2015-03-17 06:54:03 +00:00
Follow best practices for bash - Use native bash math where doing so improves readability. - Avoid illegal exit status codes (666 in impossible scenario). - Avoid useless use of cat (`cat foo | bar` vs the more efficient `bar <foo`). - Avoid needless echo pipelines (`echo foo | bar` vs `bar <<<"$foo"`). - Never use a for loop to iterate over output from `find`; `for` loops depend on string-splitting, which is only available with globbing behavior. See http://mywiki.wooledge.org/DontReadLinesWithFor - Use `read -s` to silence feedback rather than playing around with `stty`. - Use `tput` to retrieve color codes correct for the current terminal rather than assuming a terminal compatible with ANSI color codes. - Use a expression compatible with BSD `tr` in "passphrase-shredding" code. (BTW, I very much doubt that this code actually does any good; it's not a reasonable expectation that a new string assigned to a variable will actually be placed at the same location in memory). - Implementations of `echo` which do anything other than print `-e` on output when `echo -e` is run are nonconformant with the POSIX spec for echo. Similarly, `echo -n` behavior is not defined by the standard. Avoid relying on either of these. (See http://pubs.opengroup.org/onlinepubs/009604599/utilities/echo.html, particularly the APPLICATION USAGE section). - Always quote expansions to prevent string-splitting and glob-expansion (`"$i"`, not `$i`). - Avoid `some_command; if [ $? -eq 0 ]; then` when `if some_command; then` can be used instead.
2015-12-30 21:32:46 +00:00
echo "Done!" >&2
Additional exit codes added + better shredding
2015-03-17 06:54:03 +00:00
exit 0
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