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|
#!/bin/bash
PROGNAME=`basename "$0"`
# Script to extract a function from a project.
# Path of extracted packages:
PACKAGE_PATH=
# Function to extract
FUNCTION=
# Compiled binary. Can be a .so library or the program itself that has the
# symbol of interest.
BINARY=
# Project to extract from
PACKAGE_PATH=
OUTPUT=
IPA_CLONE=
# Path to CCP-POL scripts
P="$HOME/projects/kgr/scripts/ccp-pol"
# Path to compiled KLP-CCP
CCP="$HOME/projects/kgr/ccp/build/klp-ccp --pol-cmd-may-include-header=$P/kgr-ccp-pol-may-include-header.sh --pol-cmd-can-externalize-fun=$P/kgr-ccp-pol-can-externalize-fun.sh --pol-cmd-shall-externalize-fun=$P/kgr-ccp-pol-shall-externalize-fun.sh --pol-cmd-shall-externalize-obj=$P/kgr-ccp-pol-shall-externalize-obj.sh --pol-cmd-modify-externalized-sym=$P/kgr-ccp-pol-modify-externalized-sym.sh --pol-cmd-modify-patched-fun-sym=$P/kgr-ccp-pol-modify-patched-sym.sh --pol-cmd-rename-rewritten-fun=$P/kgr-ccp-pol-rename-rewritten-fun.sh"
CCP_CFLAGS=
set_project_cflags()
{
# Get which project we are analyzing.
local proj=$(echo $PACKAGE_PATH | grep -Eo "glibc|libopenssl1_1;")
if [ $proj = "libopenssl1_1" ]; then
local include_folder="-I$PACKAGE_PATH/src/openssl-1.1.1l/include
-I$PACKAGE_PATH/src/openssl-1.1.1l/"
CCP_CFLAGS="-I/usr/include/
-I/usr/include/bits/types/
-I/usr/lib64/gcc/x86_64-suse-linux/7/include/
-I/usr/lib64/gcc/x86_64-suse-linux/7/include-fixed
-Icrypto/include
-Iinclude
-I/usr/local/include
$include_folder
-fPIC
-pthread
-m64
-Wa,--noexecstack
-Wall
-O3
-O2
-Wall
-fstack-protector-strong
-funwind-tables
-fasynchronous-unwind-tables
-fstack-clash-protection
-Werror=return-type
-flto=auto
-g
-fpatchable-function-entry=16,14
-fdump-ipa-clones
-g3
-Wa,--noexecstack
-fno-common
-Wall
-DOPENSSL_USE_NODELETE
-DL_ENDIAN
-DOPENSSL_PIC
-DOPENSSL_CPUID_OBJ
-DOPENSSL_IA32_SSE2
-DOPENSSL_BN_ASM_MONT
-DOPENSSL_BN_ASM_MONT5
-DOPENSSL_BN_ASM_GF2m
-DSHA1_ASM
-DSHA256_ASM
-DSHA512_ASM
-DKECCAK1600_ASM
-DRC4_ASM
-DMD5_ASM
-DVPAES_ASM
-DGHASH_ASM
-DECP_NISTZ256_ASM
-DX25519_ASM
-DPOLY1305_ASM
-DOPENSSLDIR="\"/etc/ssl\""
-DENGINESDIR="\"/usr/lib64/engines-1.1\""
-DNDEBUG
-D_FORTIFY_SOURCE=2
-DTERMIO
-DPURIFY
-D_GNU_SOURCE
-DOPENSSL_NO_BUF_FREELISTS
-D__THROW
-MMD
-MF ssl/s3_lib.d.tmp
-MT $SOURCE
-c
-o ssl/s3_lib.o"
elif [ $proj = "glibc" ]; then
local glibc_ver="glibc-2.31"
local src_path="$PACKAGE_PATH/src/$glibc_ver"
local include_folder="
-I$src_path/include
-I$src_path/build/iconv
-I$src_path/build
-I$src_path/sysdeps/unix/sysv/linux/x86_64/64
-I$src_path/sysdeps/unix/sysv/linux/x86/include
-I$src_path/sysdeps/unix/sysv/linux/x86
-I$src_path/sysdeps/x86/nptl
-I$src_path/sysdeps/unix/sysv/linux/wordsize-64
-I$src_path/sysdeps/x86_64/nptl
-I$src_path/sysdeps/unix/sysv/linux/include
-I$src_path/sysdeps/unix/sysv/linux
-I$src_path/sysdeps/nptl
-I$src_path/sysdeps/pthread
-I$src_path/sysdeps/gnu
-I$src_path/sysdeps/unix/inet
-I$src_path/sysdeps/unix/sysv
-I$src_path/sysdeps/unix/x86_64
-I$src_path/sysdeps/unix
-I$src_path/sysdeps/posix
-I$src_path/sysdeps/x86_64/64
-I$src_path/sysdeps/x86_64/fpu/multiarch
-I$src_path/sysdeps/x86_64/fpu
-I$src_path/sysdeps/x86/fpu/include
-I$src_path/sysdeps/x86/fpu
-I$src_path/sysdeps/x86_64/multiarch
-I$src_path/sysdeps/x86_64
-I$src_path/sysdeps/x86
-I$src_path/sysdeps/ieee754/float128
-I$src_path/sysdeps/ieee754/ldbl-96/include
-I$src_path/sysdeps/ieee754/ldbl-96
-I$src_path/sysdeps/ieee754/dbl-64/wordsize-64
-I$src_path/sysdeps/ieee754/dbl-64
-I$src_path/sysdeps/ieee754/flt-32
-I$src_path/sysdeps/wordsize-64
-I$src_path/sysdeps/ieee754
-I$src_path/sysdeps/generic
-I$src_path/sysdeps/unix/sysv/linux/x86_64
-I$src_path
-I$src_path/libio
-I$src_path/build
-I/usr/include/
-I/usr/include/bits/types/
-I/usr/lib64/gcc/x86_64-suse-linux/7/include/
-I/usr/lib64/gcc/x86_64-suse-linux/7/include-fixed
-include $src_path/build/libc-modules.h
-include $src_path/include/libc-symbols.h"
CCP_CFLAGS="-c -std=gnu11 -g -O2 -Wall
-Wwrite-strings -Wundef -Werror
-fmerge-all-constants -frounding-math
-fno-stack-protector -Wstrict-prototypes
-Wold-style-definition -fmath-errno
-ftls-model=initial-exec
$include_folder
-D_LIBC_REENTRANT
-DMODULE_NAME=libc
-DTOP_NAMESPACE=glibc
-o /home/giulianob/projects/libpulp/libpulp/scripts/15-SP4/glibc/2.31-150300.26.5/src/glibc-2.31/build/iconv/iconv_open.o
-MD -MP
-MF /home/giulianob/projects/libpulp/libpulp/scripts/15-SP4/glibc/2.31-150300.26.5/src/glibc-2.31/build/iconv/iconv_open.o.dt
-MT /home/giulianob/projects/libpulp/libpulp/scripts/15-SP4/glibc/2.31-150300.26.5/src/glibc-2.31/build/iconv/iconv_open.o"
else
echo "Unsupported project"
exit 1
fi
}
# Set the KCP variables used by the policy scripts.
set_kcp_variables()
{
export KCP_READELF=readelf
export KCP_RENAME_PREFIX=klp
export KCP_WORK_DIR=/tmp/kcp
export KCP_KBUILD_SDIR=$PACKAGE_PATH
export KCP_KBUILD_ODIR=$PACKAGE_PATH
export KCP_PATCHED_OBJ=$PACKAGE_PATH/$BINARY
export KCP_UNPATCHED_OBJ=$PACKAGE_PATH/$BINARY
export KCP_IPA_CLONES_DUMP=$PACKAGE_PATH/$IPA_CLONE
# _Pragma is used on glibc source to define weak aliases to symbols.
# KLP-CCP doesn't implement that and probably never will.
export KCP_EXT_BLACKLIST=weak_extern,_Static_assert
}
do_extract_function()
{
local target_function=$FUNCTION
local compiler_version="x86_64-gcc-9.1.0"
local output="/tmp/lp.c"
pushd $PACKAGE_PATH
echo $KCP_PATCHED_OBJ
set -o xtrace
$CCP --compiler=$compiler_version \
-i $FUNCTION \
-o "$OUTPUT" \
-- $CCP_CFLAGS $PACKAGE_PATH/$SOURCE
set +o xtrace
popd
}
print_help_message()
{
echo "Extract function from project and its dependencies."
echo "Author: Giuliano Belinassi (gbelinassi@suse.de)"
echo "Based on klp-ccp"
echo ""
echo "Usage: $PROGNAME <switches>"
echo "where <switches>"
echo " --function=FUNCTION Function to extract."
echo " --package=PATH_TO_PROJECT Path to project."
echo " --binary=PATH_TO_BINARY Path to final .so file."
echo " --source=PATH_TO_SOURCE Path to .c file containing FUNCTION."
echo " --output=PATH_TO_GENERATED_C Path to output .c file."
echo ""
echo "Example: "
echo " ./extract_function.sh --function="SSL_load_client_CA_file" --package=15-SP4/libopenssl1_1/1.1.1l-150400.7.7.1 --binary="binaries/usr/lib64/libssl.so.1.1" --source="src/openssl-1.1.1l/ssl/ssl_cert.c" --ipa-clone=ipa-clones/ssl/ssl_cert.c.000i.ipa-clones --output=/tmp/lp.c"
}
sanitize_arguments()
{
if [ ! -f $PACKAGE_PATH/$SOURCE ]; then
echo "ERROR: Source file $PACKAGE_PATH/$SOURCE" does not exist.
exit 1
fi
#
# if [ ! -f $PACKAGE_PATH/$IPA_CLONE ]; then
# echo "ERROR: ipa-clone $PACKAGE_PATH/$IPA_CLONE" does not exist.
# exit 1
# fi
#
}
parse_program_argv()
{
# If user didn't provide any arugment, then bails out with a help message.
if [[ -z "$@" ]]; then
print_help_message
exit 0
fi
# Parse arguments provided by user.
for i in "$@"; do
case $i in
--package=*)
PACKAGE_PATH=$(realpath "${i#*=}")
shift
;;
--function=*)
FUNCTION="${i#*=}"
shift
;;
--binary=*)
BINARY="${i#*=}"
shift
;;
--source=*)
SOURCE="${i#*=}"
shift
;;
--ipa-clone=*)
IPA_CLONE="${i#*=}"
shift
;;
--output=*)
OUTPUT="${i#*=}"
shift
;;
--help)
print_help_message
exit 0
shift
;;
-*|--*)
echo "Unknown option $i"
echo ""
print_help_message
exit 1
;;
*)
;;
esac
done
sanitize_arguments
}
main()
{
parse_program_argv $*
set_kcp_variables
set_project_cflags
do_extract_function
}
main $*
|
