Commit ca95804c authored by Niels Möller's avatar Niels Möller

ChangeLog for curve448 changes

parent 389c787e
2019-12-01 Niels Möller <>
Curve 448 support contributed by Daiki Ueno.
* eccdata.c (enum ecc_type): Add ECC_TYPE_EDWARDS.
(ecc_add): Support untwisted edwards curves.
(ecc_curve_init): Add curve448 parameters.
* ecc-internal.h (ECC_ECDSA_KEYGEN_ITCH): New macro.
(ECC_ECDSA_SIGN_ITCH): Increased from 12*size to 13*size.
(ECC_MAX): New macro.
* ecc-448.c: New file.
(ecc_mod_pow_2k, ecc_mod_pow_446m224m1, ecc_448_inv)
(ecc_448_zero_p, ecc_448_sqrt): New functions.
(_nettle_curve448): New curve definition.
* curve448.h (CURVE448_SIZE): New constant.
(curve448_mul_g, curve448_mul): Declare new public functions.
* ecc-eh-to-a.c (ecc_eh_to_a): Update assert to allow the curve448
Edwards curve.
* curve448-mul.c (curve448_mul): New file and function.
* curve448-mul-g.c (curve448_mul_g): New file and function.
* curve448-eh-to-x.c (curve448_eh_to_x): New file and function.
* ecc-dup-eh.c (ecc_dup_eh_untwisted): New function.
* ecc-add-ehh.c (ecc_add_ehh_untwisted): New function.
* ecc-add-eh.c (ecc_add_eh_untwisted): New function.
* ecc-point.c (ecc_point_set): Add point validation for curve448.
* ecc-point-mul.c (ecc_point_mul): Allow h_to_a_itch larger than
* ecc-point-mul-g.c (ecc_point_mul_g): Allow h_to_a_itch
larger than mul_g_itch. Switch from TMP_DECL/_ALLOC/_FREE to
* ecdsa-keygen.c (ecdsa_generate_keypair): Use
* (hogweed_SOURCES): Add ecc-448.c, curve448-mul-g.c,
curve448-mul.c, and curve448-eh-to-x.c.
(HEADERS): Add curve448.h.
(ecc-448.h): New generated file.
* testsuite/testutils.c (ecc_curves): Add _nettle_curve448 to list
of tested curves.
(test_ecc_mul_a): Add curve448.
* testsuite/ecdsa-keygen-test.c (ecc_valid_p): Add curve448 support.
* testsuite/ecdh-test.c (test_main): Add tests for (non-standard)
curve448 diffie-hellman.
* testsuite/ecc-add-test.c (test_main): Update for testing of curve448.
* testsuite/ecc-dup-test.c (test_main): Likewise.
* testsuite/ecc-mul-a-test.c (test_main): Likewise. Also increase
scratch allocation for h_to_a_itch.
* testsuite/ecc-mul-g-test.c (test_main): Likewise.
* testsuite/curve448-dh-test.c: Test for curve448.
* testsuite/ (TS_HOGWEED_SOURCES): Add curve448-dh-test.c.
* examples/ecc-benchmark.c: Add curve448 to list of benchmarked
* nettle.texinfo (Curve 25519 and Curve 448): Add docs.
2019-11-21 Niels Möller <>
* eccdata.c (ecc_curve_init_str): Delete unused t and d arguments.
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