Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) * Add Chacha20-Poly1305 authenticated encryption * Add general AEAD approach. * Add [email protected] algo using LibTomCrypt chacha and poly1305 routines. Chacha20-Poly1305 is generally faster than AES256 on CPU w/o dedicated AES instructions, having the same key size. Compiling in will add ~5,5kB to binary size on x86-64. function old new delta chacha_crypt - 1397 +1397 _poly1305_block - 608 +608 poly1305_done - 595 +595 dropbear_chachapoly_crypt - 457 +457 .rodata 26976 27392 +416 poly1305_process - 290 +290 poly1305_init - 221 +221 chacha_setup - 218 +218 encrypt_packet 1068 1270 +202 dropbear_chachapoly_getlength - 147 +147 decrypt_packet 756 897 +141 chacha_ivctr64 - 137 +137 read_packet 543 637 +94 dropbear_chachapoly_start - 94 +94 read_kex_algos 792 880 +88 chacha_keystream - 69 +69 dropbear_mode_chachapoly - 48 +48 sshciphers 280 320 +40 dropbear_mode_none 24 48 +24 dropbear_mode_ctr 24 48 +24 dropbear_mode_cbc 24 48 +24 dropbear_chachapoly_mac - 24 +24 dropbear_chachapoly - 24 +24 gen_new_keys 848 854 +6 ------------------------------------------------------------------------------ (add/remove: 14/0 grow/shrink: 10/0 up/down: 5388/0) Total: 5388 bytes * Add AES128-GCM and AES256-GCM authenticated encryption * Add general AES-GCM mode. * Add [email protected] and [email protected] algo using LibTomCrypt gcm routines. AES-GCM is combination of AES CTR mode and GHASH, slower than AES-CTR on CPU w/o dedicated AES/GHASH instructions therefore disabled by default. Compiling in will add ~6kB to binary size on x86-64. function old new delta gcm_process - 1060 +1060 .rodata 26976 27808 +832 gcm_gf_mult - 820 +820 gcm_add_aad - 660 +660 gcm_shift_table - 512 +512 gcm_done - 471 +471 gcm_add_iv - 384 +384 gcm_init - 347 +347 dropbear_gcm_crypt - 309 +309 encrypt_packet 1068 1270 +202 decrypt_packet 756 897 +141 gcm_reset - 118 +118 read_packet 543 637 +94 read_kex_algos 792 880 +88 sshciphers 280 360 +80 gcm_mult_h - 80 +80 dropbear_gcm_start - 62 +62 dropbear_mode_gcm - 48 +48 dropbear_mode_none 24 48 +24 dropbear_mode_ctr 24 48 +24 dropbear_mode_cbc 24 48 +24 dropbear_ghash - 24 +24 dropbear_gcm_getlength - 24 +24 gen_new_keys 848 854 +6 ------------------------------------------------------------------------------ (add/remove: 14/0 grow/shrink: 10/0 up/down: 6434/0) Total: 6434 bytes

#!/bin/bash
echo "$1 ($2, $3)..."

make clean 1>/dev/null 2>/dev/null

echo -n "building..."

if [ -f /proc/cpuinfo ]
then
  MAKE_JOBS=$(( ($(cat /proc/cpuinfo | grep -E '^processor[[:space:]]*:' | tail -n -1 | cut -d':' -f2) + 1) * 2 + 1 ))
else
  MAKE_JOBS=8
fi

CFLAGS="$2 $CFLAGS $4" EXTRALIBS="$5" make -j$MAKE_JOBS -f $3 all_test 1>gcc_1.txt 2>gcc_2.txt
mret=$?
cnt=$(wc -l < gcc_2.txt)
# ignore 1 line since ar prints to stderr instead of stdout and ar is called for
# $(LIBNAME)
if [[ $mret -ne 0 ]] || [[ $cnt -gt 1 ]]; then
   echo "build $1 failed! printing gcc_2.txt now for convenience"
   cat gcc_2.txt
   exit 1
fi

echo -n "testing..."

if [ -a test ] && [ -f test ] && [ -x test ]; then
   ((./test >test_std.txt 2>test_err.txt && ./tv_gen > tv.txt) && echo "$1 test passed." && echo "y" > testok.txt) || (echo "$1 test failed, look at test_err.txt or tv.txt" && exit 1)
   if find *_tv.txt -type f 1>/dev/null 2>/dev/null ; then
      for f in *_tv.txt; do
         # check for lines starting with '<' ($f might be a subset of notes/$f)
         difftroubles=$(diff -i -w -B $f notes/$f | grep '^<')
         if [ -n "$difftroubles" ]; then
            echo "FAILURE: $f"
            diff -i -w -B $f notes/$f
            echo "tv_gen $f failed" && rm -f testok.txt && exit 1
         else
            true
         fi
      done
   fi
fi


if [ -a testok.txt ] && [ -f testok.txt ]; then
   if [ "$LTC_COVERAGE" != "" ]; then
      ./coverage_more.sh > test_coverage_more.txt || exit 1
      lcov_opts="--capture --no-external --directory src -q"
      lcov_out=$(echo coverage_$1_$2_$3 | tr ' -=+' '_')".info"
      lcov $lcov_opts --output-file $lcov_out
   fi
   exit 0
fi
exit 1

# ref:         $Format:%D$
# git commit:  $Format:%H$
# commit time: $Format:%ai$