ChangeLog 313 KB
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2014-09-23  Niels Möller  <nisse@lysator.liu.se>

	* ecc-mod-inv.c (ecc_mod_inv): Interface change, make ap input
	const, and require 2n limbs at rp. Preparing for powm-based
	alternative implementations. Drop #if:ed out code and dp
	temporary. Updated all callers, more complicated cases described
	below.
	* ecc-internal.h (typedef ecc_mod_inv_func): Added const to input
	argument.
	(ECC_MOD_INV_ITCH): Renamed, was ECC_MODINV_ITCH, and reduced to
	2*n.
	* ecc-ecdsa-verify.c (ecc_ecdsa_verify): Overhauled allocation,
	putting mod_inv scratch at the end.

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2014-09-22  Niels Möller  <nisse@lysator.liu.se>

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	* ecc-random.c (ecc_mod_random): Renamed, and take a const struct
	ecc_modulo * as argument. Updated callers.
	(ecc_modq_random): ... old name.

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	* ecc-mod-arith.c: New file, replacing ecc-modp.c and ecc-modq.c.
	All functions take a struct ecc_modulo as argument.
	(ecc_mod_add, ecc_mod_sub, ecc_mod_mul_1, ecc_mod_addmul_1)
	(ecc_mod_submul_1, ecc_mod_mul, ecc_mod_sqr): New functions,
	replacing the corresponding ecc_modp_* functions. For convenience,
	old names are defined as macros wrapping the new functions.
	* ecc-modp.c: Deleted file.
	* ecc-modq.c: Deleted file.
	* Makefile.in (hogweed_SOURCES): Updated accordingly.

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	* testsuite/ecc-redc-test.c (test_main): Relaxed tests for which
	tests to run.

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	* testsuite/ecc-modinv-test.c (test_modulo): New function, same
	organization as in ecc-mod-test.c below.

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	* testsuite/ecc-mod-test.c (test_modulo): New function, testing
	one modulo. Replacing...
	(test_curve): ... old function.
	(test_main): Invoke test_modulo for p and q of each curve.

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	* ecc-internal.h (ecc_mod_inv_func): New typedef.
	(struct ecc_modulo): Added mp1h constant and invert function
	pointer. Updated all callers.
	* ecc-modp.c (ecc_modp_inv): Deleted wrapper function.
	* ecc-modq.c (ecc_modq_inv): Deleted wrapper function.

	* ecc-mod-inv.c (ecc_mod_inv): Renamed file and function. Also
	take a struct ecc_modulo * as argument.
	* sec-modinv.c (sec_modinv): ... the old names. Deleted.
	* Makefile.in (hogweed_SOURCES): Updated accordingly.

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	* examples/ecc-benchmark.c (bench_modinv_powm, bench_curve):
	Updated benchmarking of mpn_sec_powm.

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	* ecc-internal.h (struct ecc_curve): Deleted redc function
	pointer. Use only reduce pointer, which is redc or modp as
	applicable. Updated all users.
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	(struct ecc_modulo): Moved mod and reduce function pointers to
	this struct.
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	* ecc-generic-modp.c (ecc_generic_modp): Deleted file and
	function. We no longer need a wrapper around ecc_mod.
	* ecc-generic-modq.c (ecc_generic_modq): Likewise deleted.
	* Makefile.in (hogweed_SOURCES): Removed ecc-generic-modp.c and
	ecc-generic-modq.c.

	* ecc-internal.h (typedef ecc_mod_func): Take a const struct
	ecc_modulo * argument, not const struct ecc_curve *. Updated all
	implementations and all callers.

	* ecc-mod.c (ecc_mod): Use struct ecc_modulo to specify the
	modulo. Drop input size argument, always reduce from 2*size to
	size.

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	* ecc-internal.h (struct ecc_modulo): New struct, collecting
	constants needed for modulo arithmetic.
	(struct ecc_curve): Use struct ecc_modulo for p and q arithmetic.
	Updated all ecc-related files.

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2014-09-17  Niels Möller  <nisse@lysator.liu.se>

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	* gmp-glue.c (mpn_get_base256_le): Fixed missing update of rn
	counter, making the function clear some bytes beyond the end of
	the output buffer. The bug triggered a make check failure on ARM.

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	* testsuite/testutils.c (ecc_curves): Include curve25519 in list.
	(test_ecc_mul_a): Include reference points for curve25519 (with
	Edwards coordinates). Allow n == 0 and n == 1, comparing to zero
	and the generator, respectively.
	* testsuite/ecc-add-test.c (point_zero_p): Deleted function.
	(test_main): Replace calls to point_zero_p by calls to
	test_ecc_mul_h with n == 0.
	* testsuite/ecc-dup-test.c: Likewise.

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	* testsuite/ecc-modinv-test.c (mpn_zero_p): Moved function, to...
	* testsuite/testutils.c (mpn_zero_p): New location. Also make
	non-static.

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	* testsuite/ecdsa-keygen-test.c (ecc_valid_p): Add special case
	for curve25519.

	* testsuite/ecc-mul-a-test.c (test_main): Fix point negation to
	support curve25519.
	* testsuite/ecc-mul-g-test.c (test_main): Likewise.

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	* ecc-a-to-eh.c (ecc_a_to_eh_itch, ecc_a_to_eh): Deleted file and
	functions.
	* ecc.h: Deleted corresponding declarations.
	* ecc-internal.h (ECC_A_TO_EH_ITCH): Deleted macro.
	* Makefile.in (hogweed_SOURCES): Removed ecc-a-to-eh.c.

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	* testsuite/ecdh-test.c (test_main): Update curve25519 test to use
	Edwards coordinates.
	* testsuite/ecdsa-sign-test.c (test_main): Likewise.
	* testsuite/ecdsa-verify-test.c (test_main): Likewise.

	* ecc-point.c (ecc_point_set): Use Edwards rather than Montgomery
	curve.

	* ecc-mul-a-eh.c (ecc_mul_a_eh, table_init): Take an Edwards point
	as input, not a Montgomery point. Hence, use ecc_a_to_j, not
	ecc_a_to_eh.

	* ecc-eh-to-a.c (ecc_eh_to_a): Just convert to affine coordinates,
	don't transform from Edwards to Montgomery form. Also reduces
	scratch need slightly.
	* ecc-internal.h (ECC_EH_TO_A_ITCH): Reduced.

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	* ecdsa-keygen.c (ecdsa_generate_keypair): Use struct ecc_curve
	function pointers.

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	* testsuite/curve25519-dup-test.c: Deleted file. In the way for
	conversion to Edwards coordiante convention, and in the end
	the tests will be done by ecc-dup-test.c.
	* testsuite/curve25519-add-test.c: Similarly deleted.
	* testsuite/Makefile.in (TS_HOGWEED_SOURCES): Removed
	curve25519-dup-test.c and curve25519-add-test.c.

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2014-09-16  Niels Möller  <nisse@lysator.liu.se>

	* testsuite/ecc-add-test.c: New generalized testcase, to replace
	curve25519-add-test.c.
	* testsuite/ecc-dup-test.c: New generalized testcase, to replace
	curve25519-dup-test.c.
	* testsuite/Makefile.in (TS_HOGWEED_SOURCES): Added ecc-add-test.c
	and ecc-dup-test.c.

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2014-09-14  Niels Möller  <nisse@lysator.liu.se>

	* testsuite/ecc-mul-a-test.c (test_main): Use struct ecc_curve
	function pointers.
	* testsuite/ecc-mul-g-test.c (test_main): Likewise.

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2014-09-09  Niels Möller  <nisse@lysator.liu.se>

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	* curve25519-mul.c (curve25519_mul): Switch to use Montgomery
	ladder. About 20% faster than current Edwards curve operations.
	Difference is expected to shrink when Edwards operations are
	optimized to take advantage of the twist, but it seems unlikely to
	get significantly faster than the Montgomery ladder.

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	* gmp-glue.c (cnd_swap): Moved function here, made non-static.
	Changed cnd type to mp_limb_t, for consistency with GMP
	mpn_cnd_add_n.
	* sec-modinv.c (cnd_swap): ... old location.
	* gmp-glue.h (cnd_swap): Declare function.

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2014-09-06  Niels Möller  <nisse@lysator.liu.se>

	* examples/hogweed-benchmark.c (bench_curve25519_mul_g)
	(bench_curve25519_mul, bench_curve25519): New functions.
	(main): Added benchmarking of curve25519 functions.

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2014-09-03  Niels Möller  <nisse@lysator.liu.se>

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	* Makefile.in: Revert 2013-02-06 Makefile changes: use a single
	rule for transforming .asm to .o, and drop include of asm.d.
	Possible now since we generate a single object file from each asm
	file. This change also helps Solaris' make recognize .asm files.
	* config.make.in (.SUFFIXES): Drop .s from list.
	* configure.ac: Delete code to generate asm.d.

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	* Makefile.in: Delete all uses of *.po files, use the same object
	files for both shared and static libraries.
	* configure.ac (dummy-dep-files): Don't create any .po.d files.

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	* aclocal.m4 (LSH_CCPIC): Don't substitute CCPIC here, let
	configure.ac do that if needed.

	* configure.ac (CCPIC_MAYBE, SHLIBCFLAGS): Deleted substituted
	variables. Instead, use CCPIC directly when compiling all library
	files.
	(CCPIC): Set to empty, if --disable-pic is used.

	* config.make.in (SHLIBCFLAGS, CCPIC_MAYBE): Deleted.
	(COMPILE, COMPILE_CXX): Drop CCPIC. New variable EXTRA_CFLAGS,
	which can be set by individual Makefiles.

	* Makefile.in (EXTRA_CFLAGS): Set using CCPIC.
	Also delete all uses of CCPIC_MAYBE and SHLIBCFLAGS.

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2014-09-02  Niels Möller  <nisse@lysator.liu.se>

	* curve25519-eh-to-x.c (curve25519_eh_to_x): New file, new
	function. The curve25519 transform currently done by ecc_eh_to_a,
	but which should eventually be eliminted from that function.
	* Makefile.in (hogweed_SOURCES): Added curve25519-eh-to-x.c.
	* ecc-internal.h (curve25519_eh_to_x): Declare it.
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	* curve25519-mul.c (curve25519_mul): Use it.
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	* curve25519-mul-g.c (curve25519_mul_g): Likewise. Also introduce
	local variable ecc, and use ecc->mul_g_itch.
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2014-08-29  Niels Möller  <nisse@lysator.liu.se>

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	* testsuite/testutils.c (test_ecc_mul_j): Renamed, to ...
	(test_ecc_mul_h): ... new name. Use ecc->h_to_a function pointer.
	Updated callers.

	* examples/ecc-benchmark.c (bench_add_jjj): Renamed, to ...
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	(bench_add_hhh): ... new name. Use ecc->add_hhh function pointer.
	(bench_add_ehh): Deleted.
	(bench_curve): Use bench_add_hhh for all curves. Use ecc->mul_itch
	for scratch size.

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	Switch the curve25519 implementation to use the isomorphism to the
	twisted Edwards curve which is used for Ed25519 signatures.
	* eccdata.c (ecc_curve_init): Tweaked the transformation constant
	for the isomorphism between curve25519 and the twisted Edwards
	curve.
	* ecc-add-ehh.c (ecc_add_ehh): Updated formulas for the twist curve.
	* ecc-add-eh.c (ecc_add_eh): Likewise.
	* ecc-dup-eh.c (ecc_dup_eh): Likewise.

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2014-08-28  Niels Möller  <nisse@lysator.liu.se>

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	* ecdsa-verify.c (ecdsa_verify): Drop include of ecc-internal.h,
	use ecc_size function instead.

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	* ecc-ecdsa-verify.c (ecc_ecdsa_verify): Use the struct ecc_curve
	function pointers: mul, mul_g, add_hhh, h_to_a.

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	* ecc-internal.h (ECC_ECDSA_VERIFY_ITCH): Deleted macro. Needed
	scratch depends on curve type, not just size.
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	(ecc_add_func): New typedef.
	(struct ecc_curve): New function pointer add_hhh, and constant
	add_hhh_itch. Updated all instances.

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	* ecdsa-verify.c (ecdsa_verify): Use the ecc_ecdsa_verify_itch
	function, not the corresponding macro.
	* ecc-ecdsa-verify.c (ecc_ecdsa_verify_itch): Take ecc->mul_itch
	into account. Also reduce to 5*ecc->size + ecc->mul_itch.

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	* testsuite/ecdsa-sign-test.c (test_main): Added test for the
	obscure case of ecdsa using curve25519.
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	* testsuite/ecdsa-verify-test.c (test_main): Likewise (depends on
	above changes).
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	* ecc-ecdsa-sign.c (ecc_ecdsa_sign): Use mul_g and h_to_a function
	pointers. Implies (obscure) support for curve25519.

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	* ecc-25519.c (ecc_25519_modq): Access q via the ecc struct.

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	* ecc-eh-to-a.c (ecc_eh_to_a): Analogous change as for ecc_j_to_a.
	The modulo q case (op == 2) is hardcoded for curve25519.

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	* ecc-j-to-a.c (ecc_j_to_a): For curves using redc, always convert
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	back from redc form. When producing x coordinate only, optionally
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	reduce it modulo q. Completely changes the meaning of the "flags"
	argument, and renames it to "op". Update all users of this
	function or ecc->h_to_a.

	* ecc-ecdsa-sign.c (ecc_ecdsa_sign): Use new ecc_j_to_a modulo q
	feature.
	* ecc-ecdsa-verify.c (ecc_ecdsa_verify): Likewise.

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	* testsuite/symbols-test: Regexp fixes, to better filter out
	get_pc_thunk functions.

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	* ecc-generic-redc.c (ecc_generic_redc): Deleted file and
	function. Split into...
	* ecc-pp1-redc.c (ecc_pp1_redc): New file and function.
	* ecc-pm1-redc.c (ecc_pm1_redc): New file and function.
	* ecc-internal.h: Updated declarations.
	* Makefile.in (hogweed_SOURCES): Replace ecc-generic-redc.c by
	ecc-pp1-redc.c and ecc-pm1-redc.c.
	* ecc-192.c: Use ecc_pp1_redc (benchmarking only).
	* ecc-224.c: Use ecc_pm1_redc when applicable.
	* ecc-256.c: Use ecc_pp1_redc when applicable.
	* ecc-384.c: Use ecc_pp1_redc (benchmarking only).
	* ecc-521.c: Use ecc_pp1_redc (benchmarking only).
	* testsuite/ecc-redc-test.c (test_main): Replace use of
	ecc_generic_redc by ecc_pp1_redc and ecc_pm1_redc.

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	* eccdata.c (output_curve): Don't output ecc_redc_g.
	* ecc-internal.h (struct ecc_curve): Deleted unused field redc_g.
	Updated all instances.

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	* ecc-modq.c (ecc_modq_inv): Use q_bit_size.

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	* ecc-internal.h (struct ecc_curve): New field q_bit_size. Updated
	all instances.

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	* configure.ac: Bumped package version number to 3.1.
	(LIBHOGWEED_MAJOR): Bumped library version to 4.0.

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	Merged camellia-reorg changes (starting at 2014-07-04).
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	* Makefile.in (clean-here): Added ecc-25519.h.

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2014-08-26  Niels Möller  <nisse@lysator.liu.se>

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	* examples/ecc-benchmark.c (bench_mul_g, bench_mul_a): Use struct
	ecc_curve function pointers.
	(bench_mul_g_eh, bench_mul_a_eh): Deleted.
	(bench_curve): Make modq benchmark unconditional. Use bench_mul_g
	and bench_mul_a also for curve25519.

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	* testsuite/ecc-mod-test.c (test_curve): Make modq test
	unconditional, partially reverting 2014-07-04 change.

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	* ecc-25519.c (ecc_25519_modq): New function.

	* eccdata.c (output_curve): Precomputation for curve25519 mod q.

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	* mini-gmp.c (mpz_abs_sub_bit): Do full normalization, needed in
	case the most significant bit is cleared.

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2014-08-25  Niels Möller  <nisse@lysator.liu.se>

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	* testsuite/ecdh-test.c (set_point): Check return value of
	ecc_point_set.
	(test_main): Enable curve25519 test.

	* ecc-point-mul-g.c (ecc_point_mul_g): Use ecc->mul_g and
	ecc->h_to_a function pointers.
	* ecc-point-mul.c (ecc_point_mul): Use the ecc->mul and
	ecc->h_to_a function pointers.

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	* ecc-internal.h (ecc_mul_g_func, ecc_mul_func, ecc_h_to_a_func):
	New typedefs.
	(struct ecc_curve): New function pointers mul, mul_g, h_to_a, and
	constans for their scratch requirements. Updated all instances.

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	* ecc-point.c (ecc_point_set): Handle curve25519 as a special
	case, when checking if the point is on the curve.

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	* testsuite/ecdh-test.c: Test ecc_point_mul and ecc_point_mul_g,
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	using test data generated by ecc-ref.gp. Tests for all curves
	except curve25519, which doesn't yet work with the general
	ecc_point interface.

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	* testsuite/Makefile.in (TS_HOGWEED_SOURCES): Added ecdh-test.c.

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	* misc/ecc-ref.gp: Script to generate ECDH test data.

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2014-08-23  Niels Möller  <nisse@lysator.liu.se>

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	* ecc-a-to-j.c (ecc_a_to_j): Deleted INITIAL argument.
	* ecc.h (ecc_a_to_j): Updated prototype.
	* ecc-mul-a.c (ecc_mul_a, table_init): Updated calls to ecc_a_to_j.

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	* ecc-mul-a.c (ecc_mul_a): Deleted INITIAL argument, all callers,
	except the tests, pass 1. Updated all callers.
	(table_init): Likewise deleted INITIAL.
	* ecc.h (ecc_mul_a): Updated prototype.
	* testsuite/ecc-mul-a-test.c (test_main): Deleted tests for
	ecc_mul_a with INITIAL == 0.

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	* ecc-internal.h (struct ecc_curve): Reordered struct, moved
	function pointers before pointers to bignum constants.

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	* sec-modinv.c (sec_modinv): Document that for a == 0 (mod m), we
	should produce the "inverse" 0.

	* testsuite/ecc-modinv-test.c (test_main): Check that ecc_modp_inv
	produces 0 if a == 0 or a == p.

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	* x86_64/ecc-25519-modp.asm: New file. Assembly implementation,
	initial version yields 30% speedup of ecc_25519_modp. Early
	folding eliminates one pass of carry propagation, and yields
	almost 20% additional speedup.
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	* ecc-25519.c [HAVE_NATIVE_ecc_25519_modp]: Use assembly version
	if available.

	* configure.ac (asm_hogweed_optional_list): Added ecc-25519-modp.asm.
	Also add HAVE_NATIVE_ecc_25519_modp to config.h.in.

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2014-08-19  Niels Möller  <nisse@lysator.liu.se>

	* examples/ecc-benchmark.c (bench_curve): Support benchmarking of
	curve25519, for now handled as a special case.
	(curves): Added nettle_curve25519.
	(bench_dup_eh, bench_add_eh, bench_add_ehh, bench_mul_g_eh): New
	functions.

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	* testsuite/curve25519-dh-test.c (test_a): Use curve25519_mul.
	(test_main): Use little-endian inputs for test_a.
	(curve25519_sqrt, curve_25519): Deleted static helper functions,
	no longer needed.

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	* curve25519-mul.c (curve25519_mul): New file and function.
	* curve25519.h (curve25519_mul): Declare it.
	* Makefile.in (hogweed_SOURCES): Added curve25519-mul.c.

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	* curve25519-mul-g.c (curve25519_mul_g): Renamed file and
	function, updated callers.
	* curve25519-base.c (curve25519_base): ... old names.
	* Makefile.in (hogweed_SOURCES): Updated for rename.

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	* eccdata.c (output_curve): Compute constants needed for
	Shanks-Tonelli.
	* ecc-25519.c (ecc_modp_powm_2kp1, ecc_25519_sqrt): New functions.
	* ecc-internal.h (ecc_25519_sqrt): Declare it.

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	* testsuite/curve25519-dh-test.c (test_g): Use curve25519_base.
	(test_main): Use little-endian inputs for test_g.

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	* curve25519-base.c (curve25519_base): New file, new function.
	Analogous to NaCl's crypto_scalarmult_base.
	* curve25519.h: New file.
	* Makefile.in (hogweed_SOURCES): Added curve25519-base.c.
	(HEADERS): Added curve25519.h.

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	* gmp-glue.c (mpn_set_base256_le, mpn_get_base256_le): New functions.
	* gmp-glue.h: Declare them.

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	* testsuite/curve25519-dh-test.c (curve25519_sqrt): Fixed memory
	leak, a mpz_clear call was missing.

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	* ecc-internal.h (ECC_MUL_A_EH_WBITS): Set to 4, to enable
	window-based scalar multiplication.

	* ecc-mul-a-eh.c (table_init) [ECC_MUL_A_EH_WBITS > 0]: Fixed
	initialization of TABLE(1).

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2014-07-29  Niels Möller  <nisse@lysator.liu.se>

	* ecc-internal.h (ECC_MUL_A_EH_WBITS): New constant.
	(ECC_A_TO_EH_ITCH, ECC_MUL_A_EH_ITCH): New macros.
	* ecc-a-to-eh.c (ecc_a_to_eh, ecc_a_to_eh_itch): New file, new
	functions.
	* ecc-mul-a-eh.c: New file.
	(ecc_mul_a_eh): New function. The case [ECC_MUL_A_EH_WBITS > 0]
	not yet working).
	(ecc_mul_a_eh_itch): New function.
	* ecc.h: Declare new functions.
	* Makefile.in (hogweed_SOURCES): Added ecc-a-to-eh.c and
	ecc-mul-a-eh.c.

	* testsuite/curve25519-dh-test.c (curve25519_sqrt): New function.
	(curve_25519): Use ecc_mul_a_eh.
	(test_a): New function.
	(test_main): Test construction of shared secret, using scalar
	multiplication with points other than the fix generator.

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2014-07-26  Niels Möller  <nisse@lysator.liu.se>

	* ecc-add-ehh.c (ecc_add_ehh): Reduce scratch need.
	* ecc-internal.h (ECC_ADD_EHH_ITCH): Reduced to 7*size.

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2014-07-23  Niels Möller  <nisse@lysator.liu.se>

	* testsuite/curve25519-dh-test.c: New test case, based on
	draft-josefsson-tls-curve25519-05 test vectors.
	* testsuite/Makefile.in (TS_HOGWEED_SOURCES): Added curve25519-dh-test.c.

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2014-07-18  Niels Möller  <nisse@lysator.liu.se>

	* ecc-mul-g-eh.c (ecc_mul_g_eh, ecc_mul_g_eh_itch): New file and
	functions. Untested.
	* ecc.h (ecc_mul_g_eh_itch): Declare new functions.
	* ecc-internal.h (ECC_MUL_G_EH_ITCH): New macro.
	* Makefile.in (hogweed_SOURCES): Added ecc-mul-g-eh.c.

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2014-07-17  Niels Möller  <nisse@lysator.liu.se>

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	* ecc-add-eh.c (ecc_add_eh): Reduce scratch need.
	* ecc-internal.h (ECC_ADD_EH_ITCH): Reduced to 6*size.

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	* testsuite/curve25519-dup-test.c (test_main): Free allocated
	storage.

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	* ecc-add-eh.c (ecc_add_eh, ecc_add_eh_itch): New file, new
	functions.
	* ecc.h: Declare new functions.
	* ecc-internal.h (ECC_ADD_EH_ITCH): New macro.
	* Makefile.in (hogweed_SOURCES): Added ecc-add-eh.c.
	* testsuite/curve25519-add-test.c (test_main): Test ecc_add_eh.
	Additional test for g2+g2. Free allocated storage.
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2014-07-14  Niels Möller  <nisse@lysator.liu.se>

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	* testsuite/curve25519-add-test.c: New test case.
	* testsuite/Makefile.in (TS_HOGWEED_SOURCES): Added
	curve25519-add-test.c.

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	* ecc-add-ehh.c (ecc_add_ehh, ecc_add_ehh_itch): New file, new
	functions.
	* ecc.h (ecc_add_ehh, ecc_add_ehh_itch): Declare them.
	* ecc-internal.h (ECC_ADD_EHH_ITCH): New macro.
	* Makefile.in (hogweed_SOURCES): Added ecc-add-ehh.c.

	* ecc-25519.c (nettle_curve25519): Use ecc_d instead of ecc_b.

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	* eccdata.c: For curve25519, output the Edwards curve constant,
	ecc_d = (121665/121666) mod p.

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	* testsuite/curve25519-dup-test.c (test_main): Add test for 4g.
	Delete some left-over debug output.

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2014-07-11  Niels Möller  <nisse@lysator.liu.se>

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	* misc/ecc-formulas.tex: Some ECC notes.

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	* testsuite/curve25519-dup-test.c: New testcase.
	* testsuite/Makefile.in (TS_HOGWEED_SOURCES): Added
	curve25519-dup-test.c.

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	* testsuite/testutils.c (test_ecc_point): Made non-static.
	* testsuite/testutils.h (struct ecc_ref_point): Moved here, from
	testutils.h.
	(test_ecc_point): Declare it.

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	* ecc-dup-eh.c (ecc_dup_eh, ecc_dup_eh_itch): New file, new functions.
	* ecc-eh-to-a.c (ecc_eh_to_a, ecc_eh_to_a_itch): New file, new
	functions.
	* ecc.h: Declare new functions.
	* ecc-internal.h (ECC_EH_TO_A_ITCH, ECC_DUP_EH_ITCH): New macros.
	* Makefile.in (hogweed_SOURCES): Added ecc-dup-eh.c and
	ecc-eh-to-a.c.

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	* ecc-internal.h (struct ecc_curve): New constant edwards_root.
	* ecc-192.c (nettle_secp_192r1): Updated accordingly, additional
	NULL pointer.
	* ecc-224.c (nettle_secp_224r1): Likewise.
	* ecc-256.c (nettle_secp_256r1): Likewise.
	* ecc-384.c (nettle_secp_384r1): Likewise.
	* ecc-521.c (nettle_secp_521r1): Likewise.
	* ecc-25519.c (nettle_curve25519): Initialize new constant.

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	* eccdata.c (ecc_curve_init): For curve 25519, use correct
	constant for edwards coordinate transform, and output the constant
	as ecc_edwards.

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2014-07-06  Niels Möller  <nisse@lysator.liu.se>

	* eccdata.c: Use separate is_zero flag to represent the neutral
	element.
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	(output_point, output_point_redc): Unified to a single function,
	with a use_redc flag argument. Also support conversion to Edwards
	form.
	(ecc_curve_init_str): New argument for Edwards curve conversion
	constant.
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2014-07-04  Niels Möller  <nisse@lysator.liu.se>

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	Started curve25519 branch.
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	* ecc-25519.c: New file.
	(ecc_25519_modp): New function.
	(nettle_curve25519): New curve.

	* ecc-curve.h (nettle_curve25519): Declare it.

	* Makefile.in (hogweed_SOURCES): Added ecc-25519.c.
	(ecc-25519.h): New generated file. Add as explicit dependency for
	ecc-25519.o.

	* testsuite/ecc-mod-test.c (test_curve): New function, extracted
	from test_main. Tolerate NULL modq function pointer.
	(test_main): Use test_curve, iterate over supported curves, and
	also test curve_25519 for the new modp function.

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	* ecc-modp.c (ecc_modp_sub_1): Deleted unused function.
	* ecc-internal.h: Deleted corresponding declaration.

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	* examples/nettle-benchmark.c (time_cipher): Fixed memset calls,
	amending the totally broken change from 2014-02-06.

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2014-07-02  Niels Möller  <nisse@lysator.liu.se>

	* eccdata.c (ecc_dup): Use mpz_submul_ui, now available in
	mini-gmp.
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	(ecc_type): New enum, for Weierstrass and Montgomery curves
	(ecc_curve): New field type.
	(ecc_dup): Support montgomery curves.
	(ecc_add): Likewise.
	(ecc_curve_init_str): New argument, for the curve type.
	(ecc_curve_init): Pass curve type to all ecc_curve_init_str calls.
	Recognize curve25519, for bit_size 255.
	(output_modulo): Deleted assert, which isn't true for curve25519.
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2014-06-30  Niels Möller  <nisse@lysator.liu.se>

	* camellia-absorb.c: Include <limits.h>, needed for correct use of
	HAVE_NATIVE_64_BIT. Reported and debugged by Magnus Holmgren.
	Fixes debian build failure on s390x.

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2014-06-26  Niels Möller  <nisse@lysator.liu.se>

	From Martin Storsjö:
	* configure.ac (IF_NOT_SHARED): New substituted variable.
	* hogweed.pc.in: Use @LIBS@, instead of hardcoding -lgmp. When
	shared libraries are disabled, move needed libraries from
	Requires.private: to Requires: and from Libs.private: to Libs:.

 	From Nikos Mavrogiannopoulos.
	* examples/hogweed-benchmark.c (bench_alg): Tolerate alg->init
	returning NULL.
	(bench_openssl_ecdsa_init): Return NULL if
	EC_KEY_new_by_curve_name fails, indicating the curve is not
	supported.

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2014-06-25  Niels Möller  <nisse@lysator.liu.se>

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	Support for building with mini-gmp instead of the real GMP. Loosely
	based on work by Nikos Mavrogiannopoulos.
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	* configure.ac: New command line option --enable-mini-gmp. Also
	disable all libgmp-related checks when enabled.
	(NETTLE_USE_MINI_GMP): New substituted variable.
	(LIBHOGWEED_LIBS): Use $(LIBS) instead of -lgmp.
	(IF_MINI_GMP): New Makefile conditional.
	(GMP_NUMB_BITS): Alternative test for the mini-gmp case.
	Substituted also in bignum.h.
	(HAVE_MPZ_POWM_SEC): Drop this unused check.

	* bignum.h: Renamed, to...
	* bignum.h.in: New name.
	(NETTLE_USE_MINI_GMP): Substituted by configure.
	(GMP_NUMB_BITS): Substituted by configure, for the mini-gmp case.

	* Makefile.in (OPT_HOGWEED_SOURCES): New variable, value
	conditional on @IF_MINI_GMP@.
	(hogweed_SOURCES): Add $(OPT_HOGWEED_SOURCES).
	(PRE_CPPFLAGS): Add -I$(srcdir).
	(HEADERS): Delete bignum.h.
	(INSTALL_HEADERS): Add bignum.h. Also add mini-gmp.h, if mini-gmp
	is enabled.
	(DISTFILES): Added bignum.h.in.
	(bignum.h): New target.
	(distclean-here): Delete bignum.h.

	* examples/ecc-benchmark.c (modinv_gcd) [NETTLE_USE_MINI_GMP]:
	Disable this benchmark.
	(mpn_random) [NETTLE_USE_MINI_GMP]: Provide a simple implementation.

	* testsuite/ecc-mod-test.c [NETTLE_USE_MINI_GMP]: Skip test, it
	depends on gmp_randstate_t.
	* testsuite/ecc-modinv-test.c [NETTLE_USE_MINI_GMP]: Likewise.
	* testsuite/ecc-mul-a-test.c [NETTLE_USE_MINI_GMP]: Likewise.
	* testsuite/ecc-mul-g-test.c [NETTLE_USE_MINI_GMP]: Likewise.
	* testsuite/ecc-redc-test.c [NETTLE_USE_MINI_GMP]: Likewise.

	Various preparations for mini-gmp support.
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	* testsuite/bignum-test.c: Use WITH_HOGWEED instead of HAVE_LIBGMP
	for preprocessor conditionals.
	* testsuite/testutils.h: Likewise.
	* testsuite/sexp-format-test.c: Likewise.

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	* testsuite/ecdsa-keygen-test.c (test_main): Use printf,
	mpz_out_str and write_mpn instead of gmp_fprintf.
	* testsuite/ecdsa-sign-test.c (test_ecdsa): Likewise.
	* testsuite/ecdsa-verify-test.c (test_ecdsa): Likewise.

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	* dsa.h: Include bignum.h instead of gmp.h.
	* ecc-internal.h: Likewise.
	* ecc.h: Likewise.
	* gmp-glue.h: Likewise.
	* pkcs1.h: Likewise.
	* rsa.h: Likewise.

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	* testsuite/testutils.c (die): Use plain vfprintf, not
	gmp_vfprintf.
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	(write_mpn): New function.
	(test_ecc_point): Use it, replacing gmp_fprintf.
	* testsuite/testutils.h (write_mpn): Declare it.
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	* der-iterator.c: Deleted HAVE_LIBGMP conditionals.

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2014-06-07  Niels Möller  <nisse@lysator.liu.se>

	* Released nettle-3.0

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	* NEWS: List des-compat.h as a candidate for removal in the next
	release.

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	* testsuite/des-compat-test.c (test_main): Fixed out of bounds
	memory read, reported by Nikos Mavrogiannopoulos.

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	* nettle-write.h: Include <stddef.h>, fixing compilation on
	freebsd.

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	* aclocal.m4 (ac_stdint): Fixed "unsinged" typo, spotted by Andy
	Goth.

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2014-06-01  Niels Möller  <nisse@lysator.liu.se>

	* x86_64/gcm-hash8.asm: Pass correct argument count to W64_EXIT.
	* x86_64/camellia-crypt-internal.asm: Pass correct argument count
	to W64_ENTRY and W64_EXIT.

	* x86_64/machine.m4 [W64_ABI]: Fix for the case of 6 function
	arguments. Also push %rdi unconditionally, and use aligned
	accesses for save and restore %xmm registers (movdqa).

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2014-05-31  Niels Möller  <nisse@lysator.liu.se>

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	* configure.ac: Check for COFF type directives.
	(ASM_COFF_STYLE): New substituted variable.
	* config.m4.in: Set COFF_STYLE from configure.
	* asm.m4 (PROLOGUE): Use COFF type directive, if enabled by
	configure. Fixes problem with windows dll linking.

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	* asm.m4: Deleted unused offsets for struct aes_ctx.

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	* testsuite/nettle-pbkdf2-test: Delete carriage return characters
	from output.

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	* configure.ac (LIBHOGWEED_LIBS): Be explicit and link
	libhogweed.so with libnettle.so, not -lnettle.
	(LIBHOGWEED_LINK): Drop -L. flag, no longer needed, and previously
	not at the correct position in the link command line.

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2014-05-27  Niels Möller  <nisse@lysator.liu.se>

	* examples/ecc-benchmark.c: If mpn_sec_powm is available,
	benchmark it, for modinv.
	(bench_modinv_powm): New function.
	(bench_curve): Use it.

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2014-05-22  Niels Möller  <nisse@lysator.liu.se>

	From Claudio Bley:
	* Makefile.in ($(des_headers)): Use the EXEEXT_FOR_BUILD.

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	* NEWS: Updated with library version numbers.

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	* configure.ac (dummy-dep-files): Use simpler and more portable
	sed expression. Problem reported by Peter Eriksson.
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	(LIBHOGWEED_MAJOR): Bumped shared library version to 3.0.
	(LIBHOGWEED_MINOR): Reset to zero. Also increased the package
	version number to 3.0.
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	* getopt.c: Don't use gettext.

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2014-05-14  Niels Möller  <nisse@lysator.liu.se>

	* testsuite/nettle-pbkdf2-test: Avoid the bash construction
	${#foo}.

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	* getopt.c: Copied from glibc tree, tag glibc-2.19.
	* getopt.h: Likewise.
	* getopt1.c: Likewise.
	* getopt_int.h: New file, also copied from glibc.
	* Makefile.in (DISTFILES): Added getopt_int.h.

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	* mini-gmp.c: Updated, use version from gmp-6.0.0.
	* mini-gmp.h: Likewise.

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	* testsuite/Makefile.in (all): Drop dependency on $(TARGETS), to
	delay building of test programs until make check.

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	* nettle.texinfo (nettle_aead abstraction): Document nettle_aead.

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	* Makefile.in (nettle_SOURCES): Added nettle-meta-aeads.c.
	* nettle-meta.h (nettle_aeads): Declare array.
	* nettle-meta-aeads.c (nettle_aeads): New file, new array.
	* testsuite/meta-aead-test.c: New test case.
	* testsuite/Makefile.in (TS_NETTLE_SOURCES): Added
	meta-aead-test.c.

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	* aclocal.m4 (GMP_PROG_CC_FOR_BUILD): If CC_FOR_BUILD is gcc, add
	-O option. This makes eccdata twice as fast.

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2014-05-06  Niels Möller  <nisse@lysator.liu.se>

	* nettle.texinfo: Document SHA3 and ChaCha-Poly1305 as
	experimental.

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2014-05-05  Niels Möller  <nisse@lysator.liu.se>

	* nettle.texinfo (POLY1305): Document poly1305-aes.
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	(Authenticated encryption): Move AEAD algorithms to their own
	section.
	(RSA, DSA, ECDSA): Change some subsections to subsubsections.
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	(ChaCha-Poly1305): Document ChaCha-Poly1305.
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2014-05-04  Niels Möller  <nisse@lysator.liu.se>

	* nettle.texinfo (DSA): Document new DSA interface.
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	(Salsa20): Update salsa20 docs.
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	(ChaCha): Document ChaCha.
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2014-05-03  Niels Möller  <nisse@lysator.liu.se>

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	* configure.ac: Check for SIZEOF_SIZE_T.
	* ccm.c (ccm_set_nonce): Skip code for 64-bit encoding when size_t
	is only 32 bits.

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	* nettle.texinfo (CCM): Document new ccm macros and constants.
	Describe ccm restrictions.

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	* ccm.h (CCM_DIGEST_SIZE): New constant.

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2014-04-30  Niels Möller  <nisse@lysator.liu.se>

	* ccm.c (CCM_IV_MAX_SIZE, CCM_IV_MIN_SIZE): Deleted, replaced by
	public constants CCM_MIN_NONCE_SIZE and CCM_MAX_NONCE_SIZE.
	(ccm_build_iv): Updated for above rename.
	(CCM_L_MAX_SIZE): Deleted, no longer used.

	* ccm.h (CCM_MIN_NONCE_SIZE, CCM_MAX_NONCE_SIZE): New constants.
	(CCM_MAX_MSG_SIZE): New macro.

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2014-04-27  Niels Möller  <nisse@lysator.liu.se>

	* nettle.texinfo (Cipher modes): Subsection on AEAD constructions.
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	(GCM): Update GCM documentation, including functions for
	gcm_aes128, gcm_camellia128, ...
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2014-04-26  Niels Möller  <nisse@lysator.liu.se>

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	* nettle.texinfo: Update for introduction of nettle_cipher_func.
	(GCM): Document GCM_DIGEST_SIZE.
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	(UMAC): Document new UMAC constants.
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	(Keyed hash functions): Make HMAC and UMAC their own info nodes.
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	(EAX): Document EAX.
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	* umac.h (UMAC_MIN_NONCE_SIZE, UMAC_MAX_NONCE_SIZE): New
	constants.

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2014-04-25  Niels Möller  <nisse@lysator.liu.se>

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	* All hash-related files: Renamed all _DATA_SIZE constants to
	_BLOCK_SIZE, for consistency. Old names kept for backwards
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	compatibility.
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	* nettle.texinfo (CCM): Documentation for CCM mode, contributed by
	Owen Kirby.

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	* testsuite/ccm-test.c (test_cipher_ccm): And tests.

	* ccm.c (ccm_decrypt_message): Change length argument, should now
	be clear text (dst) length.
	* ccm-aes128.c (ccm_aes128_decrypt_message): Likewise.
	* ccm-aes192.c (ccm_aes192_decrypt_message): Likewise.
	* ccm-aes256.c (ccm_aes256_decrypt_message): Likewise.
	* ccm.h: Updated prototypes.

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2014-04-22  Niels Möller  <nisse@lysator.liu.se>

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	* nettle.texinfo (Recommended hash functions): Document additional
	sha512 variants.

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	* sha2.h (sha512_224_ctx, sha512_256_ctx): New aliases for the
	sha512_ctx struct tag.

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2014-04-17  Niels Möller  <nisse@lysator.liu.se>

	* examples/Makefile.in (SOURCES): Deleted next-prime.c (forgotten
	in 2014-04-13 change).

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2014-04-16  Niels Möller  <nisse@lysator.liu.se>

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	* testsuite/ccm-test.c (test_cipher_ccm): Deleted check for NULL
	authdata.

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	* sha3-224.c (sha3_224_init): Pass pointer to context struct, not
	pointer to first element, to memset.
	* sha3-256.c (sha3_256_init): Likewise.
	* sha3-384.c (sha3_384_init): Likewise.
	* sha3-512.c (sha3_512_init): Likewise.

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	* examples/eratosthenes.c (vector_alloc): Use sizeof(*vector)
	instead of explicit type in malloc call.
	(vector_init): Make constant explicitly unsigned long.

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	* tools/input.c (sexp_get_quoted_char): Deleted useless for loop.

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2014-04-13  Niels Möller  <nisse@lysator.liu.se>

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	* rsa-compat.c: Deleted file.
	* rsa-compat.h: Deleted file.
	* Makefile.in (hogweed_SOURCES): Deleted rsa-compat.c.
	(HEADERS): Deleted rsa-compat.h.

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	* examples/next-prime.c: Deleted file.
	* bignum-next-prime.c (nettle_next_prime): Deleted file and
	function.
	* prime-list.h: Deleted file.
	* bignum.h (nettle_next_prime): Deleted prototype.
	* Makefile.in (hogweed_SOURCES): Deleted bignum-next-prime.c.
	(DISTFILES): Deleted prime-list.h.
	* examples/Makefile.in (HOGWEED_TARGETS): Deleted next-prime, and
	corresponding make target.

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2014-04-12  Niels Möller  <nisse@lysator.liu.se>

	* nettle.texinfo (Copyright): Updated licensing info.
	* README: Likewise.

	* Makefile.in (DISTFILES): Distribute new COPYING* files.

	* COPYING.LESSERv3: New file.
	* COPYINGv3: New file.
	* COPYING.LIB: Deleted.
	* COPYINGv2: New name for GPL version 2 file.
	* COPYING: Old name, deleted.

	* Update license headers for LGPL3+ and GPL2+ dual licensing.

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2014-04-11  Niels Möller  <nisse@lysator.liu.se>

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	* testsuite/testutils.c (test_aead): Use aead->digest_size.

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	* configure.ac: Skip GMP tests if public key support is disabled.

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	* eax.c (block16_xor): Fixed bug effecting 32-bit platforms.

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	* Makefile.in (DISTFILES): Deleted memxor.c, already included via
	nettle_SOURCES.
	* tools/Makefile.in (SOURCES): Add nettle-pbkdf2.c.

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2014-04-10  Niels Möller  <nisse@lysator.liu.se>

	From Nikos Mavrogiannopoulos:
	* examples/hogweed-benchmark.c (bench_openssl_ecdsa_init): Support
	for secp192r1 and secp256r1.
	(alg_list): Add them.

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2014-04-09  Niels Möller  <nisse@lysator.liu.se>

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	* examples/nettle-benchmark.c (main): Benchmark sha512_224 and
	sha512_256.

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	* testsuite/sha512-224-test.c: New file.
	* testsuite/sha512-256-test.c: New file.
	* testsuite/Makefile.in (TS_NETTLE_SOURCES): Added new files.

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	* nettle-meta.h (nettle_sha512_224, nettle_sha512_256): Declare.
	* sha512-224-meta.c (nettle_sha512_224): New file, new nettle_hash.
	* sha512-256-meta.c (nettle_sha512_256): New file, new nettle_hash.

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	* sha2.h (SHA512_224_DIGEST_SIZE, SHA512_224_DATA_SIZE)
	(SHA512_256_DIGEST_SIZE, SHA512_256_DATA_SIZE): New constants.

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	* sha512.c (sha512_256_digest): Typo fix, call sha512_256_init.

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	* testsuite/testutils.c (test_hash): Removed redundant init call.
	Tests that digest implies init.

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2014-03-28  Niels Möller  <nisse@lysator.liu.se>

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	* testsuite/dsa-keygen-test.c (test_main): Explicitly use
	dsa_compat_generate_keypair.
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	(test_main): Test dsa_generate_params and dsa_generate_keypair
	with a large q; p_bits = 1024, q_bits = 768.

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	* testsuite/testutils.h: Undo dsa-compat.h name mangling.

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	* dsa-keygen.c (dsa_generate_keypair): New interface, generating
	only a keypair, and no new parameters.
	* dsa-compat-keygen.c (dsa_compat_generate_keypair): New file.
	Moved old key generation function here. Use dsa_generate_keypair.

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2014-03-27  Niels Möller  <nisse@lysator.liu.se>

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	* dsa-compat.c (dsa_public_key_init, dsa_public_key_clear)
	(dsa_private_key_init, dsa_private_key_clear): : Move deprecated
	DSA functions to a separate file...
	* dsa.c: ...from here.
	* dsa-compat.h: New file, declaring deprecated DSA interface.
	Include in corresponding C files.
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