From bc5199a02abe428ad377443280b3eda60141a1d6 Mon Sep 17 00:00:00 2001 From: Werner Koch Date: Sat, 7 Sep 2013 10:06:46 +0200 Subject: ecc: Implement Curve Ed25519 signing and verification. * 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. -- 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 --- src/misc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/misc.c') diff --git a/src/misc.c b/src/misc.c index 6f03eb5a..a19e1e48 100644 --- a/src/misc.c +++ b/src/misc.c @@ -347,7 +347,7 @@ _gcry_log_printmpi (const char *text, gcry_mpi_t mpi) } else { - rawmpi = _gcry_mpi_get_buffer (mpi, &rawmpilen, &sign); + rawmpi = _gcry_mpi_get_buffer (mpi, 0, &rawmpilen, &sign); if (!rawmpi) do_printhex (text? text:" ", " [out of core]", NULL, 0); else -- cgit v1.2.1