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https://git.code.sf.net/p/linux-ima/ima-evm-utils
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b628d8bfdb
If configured with "--with-kernel-headers=PATH" try to extract hash algorithms from "hash_info.h" from the kernel source tree or kernel-headers package located in the specified path. (Otherwise, it will be tried to get from the installed kernel.) This also introduces two algorithm lists, one is built-in and another is from the kernel source. (They should never contain conflicting algorithm IDs by their append-only nature.) If the digest is not found in the built-in list it will be searched in the list from kernel's "hash_info.h". This patch will allow evmctl to be just recompiled to work with digest algorithms introduced in the newer kernels. Suggested-by: Mimi Zohar <zohar@linux.ibm.com> Signed-off-by: Vitaly Chikunov <vt@altlinux.org> Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
50 lines
1.5 KiB
Bash
Executable File
50 lines
1.5 KiB
Bash
Executable File
#!/bin/sh
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#
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# Generate hash_info.h from kernel headers
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#
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# Copyright (C) 2018 <vt@altlinux.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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KERNEL_HEADERS=$1
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HASH_INFO_H=uapi/linux/hash_info.h
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HASH_INFO=$KERNEL_HEADERS/include/$HASH_INFO_H
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# Allow to specify kernel-headers past include/
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if [ ! -e $HASH_INFO ]; then
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HASH_INFO2=$KERNEL_HEADERS/$HASH_INFO_H
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if [ -e $HASH_INFO2 ]; then
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HASH_INFO=$HASH_INFO2
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fi
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fi
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if [ ! -e $HASH_INFO ]; then
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echo "/* $HASH_INFO is not found */"
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HASH_INFO=/dev/null
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else
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echo "/* $HASH_INFO is found */"
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fi
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echo "enum hash_algo {"
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grep HASH_ALGO_.*, $HASH_INFO
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printf "\tHASH_ALGO__LAST\n"
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echo "};"
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echo "const char *const hash_algo_name[HASH_ALGO__LAST] = {"
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sed -n 's/HASH_ALGO_\(.*\),/\1 \L\1\E/p' $HASH_INFO | \
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while read a b; do
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# Normalize text hash name: if it contains underscore between
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# digits replace it with a dash, other underscores are removed.
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b=$(echo "$b" | sed "s/\([0-9]\)_\([0-9]\)/\1-\2/g;s/_//g")
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printf '\t%-26s = "%s",\n' "[HASH_ALGO_$a]" "$b"
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done
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echo "};"
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