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* cipher/ecc.c (ecc_generate): Check the "comp" flag for EdDSA.
* cipher/ecc-eddsa.c (eddsa_encode_x_y): Add arg WITH_PREFIX.
(_gcry_ecc_eddsa_encodepoint): Ditto.
(_gcry_ecc_eddsa_ensure_compact): Handle the 0x40 compression prefix.
(_gcry_ecc_eddsa_decodepoint): Ditto.
* tests/keygrip.c: Check an compresssed with prefix Ed25519 key.
* tests/t-ed25519.inp: Ditto.
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* cipher/ecc.c (eddsa_encodepoint): Factor most code out to ...
(eddsa_encode_x_y): new fucntion.
(eddsa_decodepoint): Allow use of an uncompressed public key.
* tests/t-ed25519.c (N_TESTS): Adjust.
* tests/t-ed25519.inp: Add test 1025.
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* cipher/ecc-curves.c (domain_parms): Add curve "Ed25519".
* cipher/ecc.c (reverse_buffer): New.
(eddsa_encodempi): New.
(eddsa_encodepoint): New.
(eddsa_decodepoint): New.
(sign_eddsa): Implement.
(verify_eddsa): Implement.
(ecc_sign): Init unused Q. Pass public key to sign_eddsa.
(ecc_verify): Init pk.Q if not used. Pass public key verbatim to
verify_eddsa.
* cipher/pubkey.c (sexp_elements_extract): Add arg OPAQUE. Change all
callers to pass 0.
(sexp_to_sig): Add arg OPAQUE and pass it to sexp_elements_extract.
(sexp_data_to_mpi): Allow for a zero length "value".
(gcry_pk_verify): Reorder parameter processing. Pass OPAQUE flag as
required.
* mpi/ec.c (ec_invm): Print a warning if the inverse does not exist.
(_gcry_mpi_ec_get_affine): Implement for our Twisted Edwards curve
model.
(dup_point_twistededwards): Implement.
(add_points_twistededwards): Implement.
(_gcry_mpi_ec_mul_point): Support Twisted Edwards.
* mpi/mpicoder.c (do_get_buffer): Add arg FILL_LE.
(_gcry_mpi_get_buffer): Ditto. Change all callers.
(_gcry_mpi_get_secure_buffer): Ditto.
* src/sexp.c (_gcry_sexp_nth_opaque_mpi): New.
* tests/t-ed25519.c: New.
* tests/t-ed25519.inp: New.
* tests/t-mpi-point.c (basic_ec_math_simplified): Print some output
only in debug mode.
(twistededwards_math): New test.
(main): Call new test.
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This is a non optimized version which takes far too long. On my X220
Thinkpad the 1024 test cases take 14 seconds (12 with --sign-with-pk).
There should be a lot of room for improvements.
Signed-off-by: Werner Koch <wk@gnupg.org>
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