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| author | Werner Koch <wk@gnupg.org> | 2016-01-28 17:33:51 +0100 |
|---|---|---|
| committer | Werner Koch <wk@gnupg.org> | 2016-01-28 17:34:17 +0100 |
| commit | 2cf2ca7bb9741ac86e8aa92d8f03b1c5f5938897 (patch) | |
| tree | aa44736804100ba41f1a1b925134dc548a969677 /src/visibility.h | |
| parent | 191c2e4fe2dc0e00f61aa44e011a9596887e6ce1 (diff) | |
| download | libgcrypt-2cf2ca7bb9741ac86e8aa92d8f03b1c5f5938897.tar.gz | |
ecc: New API function gcry_mpi_ec_decode_point.
* mpi/ec.c (_gcry_mpi_ec_decode_point): New.
* cipher/ecc-common.h: Move two prototypes to ...
* src/ec-context.h: here.
* src/gcrypt.h.in (gcry_mpi_ec_decode_point): New.
* src/libgcrypt.def (gcry_mpi_ec_decode_point): New.
* src/libgcrypt.vers (gcry_mpi_ec_decode_point): New.
* src/visibility.c (gcry_mpi_ec_decode_point): New.
* src/visibility.h: Add new function.
--
This new function make the use of the gcry_mpi_ec_curve_point function
possible in many contexts. Here is a code snippet which could be used
in gpg to check a point:
static gpg_error_t
check_point (PKT_public_key *pk, gcry_mpi_t m_point)
{
gpg_error_t err;
char *curve;
gcry_ctx_t gctx = NULL;
gcry_mpi_point_t point = NULL;
/* Get the curve name from the first OpenPGP key parameter. */
curve = openpgp_oid_to_str (pk->pkey[0]);
if (!curve)
{
err = gpg_error_from_syserror ();
goto leave;
}
point = gcry_mpi_point_new (0);
if (!point)
{
err = gpg_error_from_syserror ();
goto leave;
}
err = gcry_mpi_ec_new (&gctx, NULL, curve);
if (err)
goto leave;
err = gcry_mpi_ec_decode_point (point, m_point, gctx);
if (err)
goto leave;
if (!gcry_mpi_ec_curve_point (point, gctx))
err = gpg_error (GPG_ERR_BAD_DATA);
leave:
gcry_ctx_release (gctx);
gcry_mpi_point_release (point);
xfree (curve);
return err;
}
Signed-off-by: Werner Koch <wk@gnupg.org>
Diffstat (limited to 'src/visibility.h')
| -rw-r--r-- | src/visibility.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/visibility.h b/src/visibility.h index bb25de01..7ecd75e3 100644 --- a/src/visibility.h +++ b/src/visibility.h @@ -222,6 +222,7 @@ MARK_VISIBLEX (gcry_mpi_ec_add) MARK_VISIBLEX (gcry_mpi_ec_sub) MARK_VISIBLEX (gcry_mpi_ec_curve_point) MARK_VISIBLEX (gcry_mpi_ec_dup) +MARK_VISIBLEX (gcry_mpi_ec_decode_point) MARK_VISIBLEX (gcry_mpi_ec_get_affine) MARK_VISIBLEX (gcry_mpi_ec_mul) MARK_VISIBLEX (gcry_mpi_ec_new) @@ -492,6 +493,7 @@ MARK_VISIBLEX (_gcry_mpi_get_const) #define gcry_mpi_ec_sub _gcry_USE_THE_UNDERSCORED_FUNCTION #define gcry_mpi_ec_curve_point _gcry_USE_THE_UNDERSCORED_FUNCTION #define gcry_mpi_ec_dup _gcry_USE_THE_UNDERSCORED_FUNCTION +#define gcry_mpi_ec_decode_point _gcry_USE_THE_UNDERSCORED_FUNCTION #define gcry_mpi_ec_get_affine _gcry_USE_THE_UNDERSCORED_FUNCTION #define gcry_mpi_ec_get_mpi _gcry_USE_THE_UNDERSCORED_FUNCTION #define gcry_mpi_ec_get_point _gcry_USE_THE_UNDERSCORED_FUNCTION |