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

# MAKEFILE for linux GCC
#
# This makefile produces a shared object and requires libtool to be installed.
#
# Thanks to Zed Shaw for helping debug this on BSD/OSX.
# Tom St Denis
#
#  (GNU make only)

### USAGE:
#
# CFLAGS="-DUSE_LTM -DLTM_DESC -I/path/to/libtommath" make -f makefile.shared all EXTRALIBS=/path/to/libtommath/libtommath.a
# ./test
# make -f makefile.shared PREFIX=/opt/libtom install
#

PLATFORM := $(shell uname | sed -e 's/_.*//')

ifndef LT
  ifeq ($(PLATFORM), Darwin)
    LT:=glibtool
  else
    LT:=libtool
  endif
endif
ifeq ($(PLATFORM), CYGWIN)
  NO_UNDEFINED:=-no-undefined
endif
LTCOMPILE = $(LT) --mode=compile --tag=CC $(CC)
INSTALL_CMD = $(LT) --mode=install install
UNINSTALL_CMD = $(LT) --mode=uninstall rm

#Output filenames for various targets.
ifndef LIBNAME
   LIBNAME=libtomcrypt.la
endif


include makefile_include.mk


#ciphers come in two flavours... enc+dec and enc
src/ciphers/aes/aes_enc.o: src/ciphers/aes/aes.c src/ciphers/aes/aes_tab.c
	$(LTCOMPILE) $(LTC_CFLAGS) $(CPPFLAGS) $(LTC_LDFLAGS) -DENCRYPT_ONLY -c src/ciphers/aes/aes.c -o src/ciphers/aes/aes_enc.o

.c.o:
	$(LTCOMPILE) $(LTC_CFLAGS) $(CPPFLAGS) $(LTC_LDFLAGS) -o $@ -c $<

LOBJECTS = $(OBJECTS:.o=.lo)

$(LIBNAME): $(OBJECTS)
	$(LT) --mode=link --tag=CC $(CC) $(LTC_CFLAGS) $(CPPFLAGS) $(LTC_LDFLAGS) $(LOBJECTS) $(EXTRALIBS) -o $@ -rpath $(LIBPATH) -version-info $(VERSION_LT) $(NO_UNDEFINED)

test: $(call print-help,test,Builds the library and the 'test' application to run all self-tests) $(LIBNAME) $(TOBJECTS)
	$(LT) --mode=link --tag=CC $(CC) $(LTC_CFLAGS) $(CPPFLAGS) $(LTC_LDFLAGS) -o $(TEST) $(TOBJECTS) $(LIBNAME) $(EXTRALIBS)

# build the demos from a template
define DEMO_template
$(1): $(call print-help,$(1),Builds the library and the '$(1)' demo) demos/$(1).o $$(LIBNAME)
	$$(LT) --mode=link --tag=CC $$(CC) $$(LTC_CFLAGS) $$(CPPFLAGS) $$(LTC_LDFLAGS) $$^ $$(EXTRALIBS) -o $(1)
endef

$(foreach demo, $(strip $(DEMOS)), $(eval $(call DEMO_template,$(demo))))

install: $(call print-help,install,Installs the library + headers + pkg-config file) .common_install
	sed -e 's,^prefix=.*,prefix=$(PREFIX),' -e 's,^Version:.*,Version: $(VERSION_PC),' libtomcrypt.pc.in > libtomcrypt.pc
	install -p -d $(DESTDIR)$(LIBPATH)/pkgconfig
	install -p -m 644 libtomcrypt.pc $(DESTDIR)$(LIBPATH)/pkgconfig/

install_bins: $(call print-help,install_bins,Installs the useful demos ($(USEFUL_DEMOS))) .common_install_bins

uninstall: $(call print-help,uninstall,Uninstalls the library + headers + pkg-config file) .common_uninstall
	rm $(DESTDIR)$(LIBPATH)/pkgconfig/libtomcrypt.pc

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