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| author | Werner Koch <wk@gnupg.org> | 2013-03-19 15:12:07 +0100 |
|---|---|---|
| committer | Werner Koch <wk@gnupg.org> | 2013-03-19 15:12:07 +0100 |
| commit | 931e409e877d1e444edd53dead327ec8e64daf9a (patch) | |
| tree | 841c4f30324273512effe06d32af6f36d8da26c8 /doc/gcrypt.texi | |
| parent | 229f3219f80c9369ed9624242c0436ae6d293201 (diff) | |
| download | libgcrypt-931e409e877d1e444edd53dead327ec8e64daf9a.tar.gz | |
Extend the new EC interface and fix two bugs.
* src/ec-context.h (mpi_ec_ctx_s): Add field NEED_SYNC.
* mpi/ec.c (ec_p_sync): New.
(ec_p_init): Only set NEED_SYNC.
(_gcry_mpi_ec_set_mpi): Set NEED_SYNC for 'p' and 'a'.
(_gcry_mpi_ec_dup_point, _gcry_mpi_ec_add_points)
(_gcry_mpi_ec_mul_point): Call ec_p_sync.
(_gcry_mpi_ec_get_point): Recompute 'q' is needed.
(_gcry_mpi_ec_get_mpi): Ditto. Also allow for names 'q', 'q.x',
'q.y', and 'g'.
* cipher/ecc.c (_gcry_mpi_ec_ec2os): New.
* cipher/ecc.c (_gcry_mpi_ec_new): Fix init from parameters 'Q'->'q',
'G'->'q'.
--
Note that the parameter names are all lowercase. This patch fixes an
inconsistency.
The other bug was that changing the parameters D or A may have
resulted in wrong computations because helper variables were not
updated. Now we delay the computation of those helper variables until
we need them.
Diffstat (limited to 'doc/gcrypt.texi')
| -rw-r--r-- | doc/gcrypt.texi | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/doc/gcrypt.texi b/doc/gcrypt.texi index 4d48eb4c..a6b585df 100644 --- a/doc/gcrypt.texi +++ b/doc/gcrypt.texi @@ -3953,7 +3953,10 @@ modified, it is suggested to pass @code{1} to @var{copy}, so that the function guarantees that a modifiable copy of the MPI is returned. If @code{0} is used for @var{copy}, this function may return a constant flagged MPI. In any case @code{gcry_mpi_release} needs to be called -to release the result. For valid names @ref{ecc_keyparam}. +to release the result. For valid names @ref{ecc_keyparam}. If a +point parameter is requested it is returned as an uncompressed encoded +point. If the public key @code{q} is requested but only the private +key @code{d} is available, @code{q} will be recomputed on the fly. @end deftypefun @deftypefun gcry_mpi_point_t gcry_mpi_ec_get_point ( @ @@ -3965,7 +3968,9 @@ modified, it is suggested to pass @code{1} to @var{copy}, so that the function guarantees that a modifiable copy of the MPI is returned. If @code{0} is used for @var{copy}, this function may return a constant flagged point. In any case @code{gcry_mpi_point_release} needs to be -called to release the result. +called to release the result. If the public key @code{q} is requested +but only the private key @code{d} is available, @code{q} will be +recomputed on the fly. @end deftypefun @deftypefun gpg_error_t gcry_mpi_ec_set_mpi ( @ |