[PATCH 1/3] mpi: Add mpi_snatch and change an internal typedef.
Werner Koch
wk at gnupg.org
Fri Mar 8 22:47:28 CET 2013
* src/mpi.h (struct mpi_point_s): Rename to struct gcry_mpi_point.
(mpi_point_struct): New typedef.
(mpi_point_t): Change typedef to a pointer. Replace all occurrences
to use mpi_point_struct.
* mpi/ec.c (_gcry_mpi_ec_point_init): Rename to ..
(_gcry_mpi_point_init): this. Change all callers.
(_gcry_mpi_ec_point_free): Rename to ..
(_gcry_mpi_point_free_parts): this. Change all callers.
* mpi/mpiutil.c (gcry_mpi_snatch): New function.
* src/gcrypt.h.in (gcry_mpi_snatch, mpi_snatch): Add protoype and
macro.
* src/visibility.c (gcry_mpi_snatch): Add wrapper.
* src/visibility.h (gcry_mpi_snatch): Add macro magic.
* src/libgcrypt.def, src/libgcrypt.vers: Add new function.
--
This patch is a prerequisite to implement a public point API. The new
function gcry_mpi_snatch is actually not needed for this but is useful
anyway and will be used to implement the point API.
---
NEWS | 2 +
cipher/ecc.c | 78 +++++++++++++++++++++++++--------------------------
doc/gcrypt.texi | 7 ++++
mpi/ec.c | 71 +++++++++++++++++++++++------------------------
mpi/mpiutil.c | 19 ++++++++++++
src/gcrypt.h.in | 5 +++
src/libgcrypt.def | 2 +
src/libgcrypt.vers | 2 +-
src/mpi.h | 30 ++++++++++++--------
src/visibility.c | 7 ++++
src/visibility.h | 3 ++
11 files changed, 137 insertions(+), 89 deletions(-)
diff --git a/NEWS b/NEWS
index 45b892f..1db71e9 100644
--- a/NEWS
+++ b/NEWS
@@ -36,6 +36,7 @@ Noteworthy changes in version 1.6.0 (unreleased)
GCRY_RNG_TYPE_STANDARD NEW.
GCRY_RNG_TYPE_FIPS NEW.
GCRY_RNG_TYPE_SYSTEM NEW.
+ gcry_mpi_snatch NEW.
Noteworthy changes in version 1.5.0 (2011-06-29)
@@ -705,6 +706,7 @@ Noteworthy changes in version 1.1.3 (2001-05-31)
Copyright 2001, 2002, 2003, 2004, 2007, 2008,
2009, 2011 Free Software Foundation, Inc.
+Copyright 2013 g10 Code GmbH
This file is free software; as a special exception the author gives
unlimited permission to copy and/or distribute it, with or without
diff --git a/cipher/ecc.c b/cipher/ecc.c
index 22de3d8..789fc6c 100644
--- a/cipher/ecc.c
+++ b/cipher/ecc.c
@@ -1,22 +1,22 @@
/* ecc.c - Elliptic Curve Cryptography
- Copyright (C) 2007, 2008, 2010, 2011 Free Software Foundation, Inc.
-
- This file is part of Libgcrypt.
-
- Libgcrypt is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as
- published by the Free Software Foundation; either version 2.1 of
- the License, or (at your option) any later version.
-
- Libgcrypt is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
- USA. */
+ * Copyright (C) 2007, 2008, 2010, 2011 Free Software Foundation, Inc.
+ * Copyright (C) 2013 g10 Code GmbH
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
/* This code is originally based on the Patch 0.1.6 for the gnupg
1.4.x branch as retrieved on 2007-03-21 from
@@ -46,8 +46,6 @@
- In mpi/ec.c we use mpi_powm for x^2 mod p: Either implement a
special case in mpi_powm or check whether mpi_mulm is faster.
-
- - Decide whether we should hide the mpi_point_t definition.
*/
@@ -63,25 +61,25 @@
/* Definition of a curve. */
typedef struct
{
- gcry_mpi_t p; /* Prime specifying the field GF(p). */
- gcry_mpi_t a; /* First coefficient of the Weierstrass equation. */
- gcry_mpi_t b; /* Second coefficient of the Weierstrass equation. */
- mpi_point_t G; /* Base point (generator). */
- gcry_mpi_t n; /* Order of G. */
- const char *name; /* Name of curve or NULL. */
+ gcry_mpi_t p; /* Prime specifying the field GF(p). */
+ gcry_mpi_t a; /* First coefficient of the Weierstrass equation. */
+ gcry_mpi_t b; /* Second coefficient of the Weierstrass equation. */
+ mpi_point_struct G; /* Base point (generator). */
+ gcry_mpi_t n; /* Order of G. */
+ const char *name; /* Name of the curve or NULL. */
} elliptic_curve_t;
typedef struct
{
elliptic_curve_t E;
- mpi_point_t Q; /* Q = [d]G */
+ mpi_point_struct Q; /* Q = [d]G */
} ECC_public_key;
typedef struct
{
elliptic_curve_t E;
- mpi_point_t Q;
+ mpi_point_struct Q;
gcry_mpi_t d;
} ECC_secret_key;
@@ -292,8 +290,8 @@ static void (*progress_cb) (void *, const char*, int, int, int);
static void *progress_cb_data;
-#define point_init(a) _gcry_mpi_ec_point_init ((a))
-#define point_free(a) _gcry_mpi_ec_point_free ((a))
+#define point_init(a) _gcry_mpi_point_init ((a))
+#define point_free(a) _gcry_mpi_point_free_parts ((a))
@@ -333,7 +331,7 @@ _gcry_register_pk_ecc_progress (void (*cb) (void *, const char *,
/* Set the value from S into D. */
static void
-point_set (mpi_point_t *d, mpi_point_t *s)
+point_set (mpi_point_t d, mpi_point_t s)
{
mpi_set (d->x, s->x);
mpi_set (d->y, s->y);
@@ -521,7 +519,7 @@ generate_key (ECC_secret_key *sk, unsigned int nbits, const char *name,
gpg_err_code_t err;
elliptic_curve_t E;
gcry_mpi_t d;
- mpi_point_t Q;
+ mpi_point_struct Q;
mpi_ec_t ctx;
gcry_random_level_t random_level;
@@ -600,7 +598,7 @@ test_keys (ECC_secret_key *sk, unsigned int nbits)
{
ECC_public_key pk;
gcry_mpi_t test = mpi_new (nbits);
- mpi_point_t R_;
+ mpi_point_struct R_;
gcry_mpi_t c = mpi_new (nbits);
gcry_mpi_t out = mpi_new (nbits);
gcry_mpi_t r = mpi_new (nbits);
@@ -648,7 +646,7 @@ static int
check_secret_key (ECC_secret_key * sk)
{
int rc = 1;
- mpi_point_t Q;
+ mpi_point_struct Q;
gcry_mpi_t y_2, y2;
mpi_ec_t ctx = NULL;
@@ -719,7 +717,7 @@ sign (gcry_mpi_t input, ECC_secret_key *skey, gcry_mpi_t r, gcry_mpi_t s)
{
gpg_err_code_t err = 0;
gcry_mpi_t k, dr, sum, k_1, x;
- mpi_point_t I;
+ mpi_point_struct I;
mpi_ec_t ctx;
if (DBG_CIPHER)
@@ -790,7 +788,7 @@ verify (gcry_mpi_t input, ECC_public_key *pkey, gcry_mpi_t r, gcry_mpi_t s)
{
gpg_err_code_t err = 0;
gcry_mpi_t h, h1, h2, x, y;
- mpi_point_t Q, Q1, Q2;
+ mpi_point_struct Q, Q1, Q2;
mpi_ec_t ctx;
if( !(mpi_cmp_ui (r, 0) > 0 && mpi_cmp (r, pkey->E.n) < 0) )
@@ -925,7 +923,7 @@ ec2os (gcry_mpi_t x, gcry_mpi_t y, gcry_mpi_t p)
/* RESULT must have been initialized and is set on success to the
point given by VALUE. */
static gcry_error_t
-os2ec (mpi_point_t *result, gcry_mpi_t value)
+os2ec (mpi_point_t result, gcry_mpi_t value)
{
gcry_error_t err;
size_t n;
@@ -1430,7 +1428,7 @@ ecc_encrypt_raw (int algo, gcry_mpi_t *resarr, gcry_mpi_t k,
/* The following is false: assert( mpi_cmp_ui( R.x, 1 )==0 );, so */
{
- mpi_point_t R; /* Result that we return. */
+ mpi_point_struct R; /* Result that we return. */
gcry_mpi_t x, y;
x = mpi_new (0);
@@ -1490,8 +1488,8 @@ ecc_decrypt_raw (int algo, gcry_mpi_t *result, gcry_mpi_t *data,
gcry_mpi_t *skey, int flags)
{
ECC_secret_key sk;
- mpi_point_t R; /* Result that we return. */
- mpi_point_t kG;
+ mpi_point_struct R; /* Result that we return. */
+ mpi_point_struct kG;
mpi_ec_t ctx;
gcry_mpi_t r;
int err;
diff --git a/doc/gcrypt.texi b/doc/gcrypt.texi
index fa24def..8bfcbfd 100644
--- a/doc/gcrypt.texi
+++ b/doc/gcrypt.texi
@@ -3600,6 +3600,13 @@ small values (usually up to the word size of the CPU).
Swap the values of @var{a} and @var{b}.
@end deftypefun
+ at deftypefun void gcry_mpi_snatch (@w{gcry_mpi_t @var{w}}, @
+ @w{const gcry_mpi_t @var{u}})
+
+Set @var{u} into @var{w} and release @var{u}. If @var{w} is
+ at code{NULL} only @var{u} will be released.
+ at end deftypefun
+
@node MPI formats
@section MPI formats
diff --git a/mpi/ec.c b/mpi/ec.c
index e325358..7b1ef2b 100644
--- a/mpi/ec.c
+++ b/mpi/ec.c
@@ -1,23 +1,22 @@
/* ec.c - Elliptic Curve functions
- Copyright (C) 2007 Free Software Foundation, Inc.
-
- This file is part of Libgcrypt.
-
- Libgcrypt is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as
- published by the Free Software Foundation; either version 2.1 of
- the License, or (at your option) any later version.
-
- Libgcrypt is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
- USA. */
-
+ * Copyright (C) 2007 Free Software Foundation, Inc.
+ * Copyright (C) 2013 g10 Code GmbH
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
#include <config.h>
#include <stdio.h>
@@ -28,8 +27,8 @@
#include "g10lib.h"
-#define point_init(a) _gcry_mpi_ec_point_init ((a))
-#define point_free(a) _gcry_mpi_ec_point_free ((a))
+#define point_init(a) _gcry_mpi_point_init ((a))
+#define point_free(a) _gcry_mpi_point_free_parts ((a))
/* Object to represent a point in projective coordinates. */
@@ -64,10 +63,10 @@ struct mpi_ec_ctx_s
-/* Initialized a point object. gcry_mpi_ec_point_free shall be used
- to release this object. */
+/* Initialize the fields of a point object. gcry_mpi_point_free_parts
+ may be used to release the fields. */
void
-_gcry_mpi_ec_point_init (mpi_point_t *p)
+_gcry_mpi_point_init (mpi_point_t p)
{
p->x = mpi_new (0);
p->y = mpi_new (0);
@@ -75,18 +74,19 @@ _gcry_mpi_ec_point_init (mpi_point_t *p)
}
-/* Release a point object. */
+/* Release the parts of a point object. */
void
-_gcry_mpi_ec_point_free (mpi_point_t *p)
+_gcry_mpi_point_free_parts (mpi_point_t p)
{
mpi_free (p->x); p->x = NULL;
mpi_free (p->y); p->y = NULL;
mpi_free (p->z); p->z = NULL;
}
+
/* Set the value from S into D. */
static void
-point_set (mpi_point_t *d, mpi_point_t *s)
+point_set (mpi_point_t d, mpi_point_t s)
{
mpi_set (d->x, s->x);
mpi_set (d->y, s->y);
@@ -339,12 +339,13 @@ _gcry_mpi_ec_free (mpi_ec_t ctx)
gcry_free (ctx);
}
+
/* Compute the affine coordinates from the projective coordinates in
POINT. Set them into X and Y. If one coordinate is not required,
X or Y may be passed as NULL. CTX is the usual context. Returns: 0
on success or !0 if POINT is at infinity. */
int
-_gcry_mpi_ec_get_affine (gcry_mpi_t x, gcry_mpi_t y, mpi_point_t *point,
+_gcry_mpi_ec_get_affine (gcry_mpi_t x, gcry_mpi_t y, mpi_point_t point,
mpi_ec_t ctx)
{
gcry_mpi_t z1, z2, z3;
@@ -374,12 +375,10 @@ _gcry_mpi_ec_get_affine (gcry_mpi_t x, gcry_mpi_t y, mpi_point_t *point,
}
-
-
/* RESULT = 2 * POINT */
void
-_gcry_mpi_ec_dup_point (mpi_point_t *result, mpi_point_t *point, mpi_ec_t ctx)
+_gcry_mpi_ec_dup_point (mpi_point_t result, mpi_point_t point, mpi_ec_t ctx)
{
#define x3 (result->x)
#define y3 (result->y)
@@ -463,8 +462,8 @@ _gcry_mpi_ec_dup_point (mpi_point_t *result, mpi_point_t *point, mpi_ec_t ctx)
/* RESULT = P1 + P2 */
void
-_gcry_mpi_ec_add_points (mpi_point_t *result,
- mpi_point_t *p1, mpi_point_t *p2,
+_gcry_mpi_ec_add_points (mpi_point_t result,
+ mpi_point_t p1, mpi_point_t p2,
mpi_ec_t ctx)
{
#define x1 (p1->x )
@@ -608,8 +607,8 @@ _gcry_mpi_ec_add_points (mpi_point_t *result,
an integer SCALAR and a POINT as well as the usual context CTX.
RESULT will be set to the resulting point. */
void
-_gcry_mpi_ec_mul_point (mpi_point_t *result,
- gcry_mpi_t scalar, mpi_point_t *point,
+_gcry_mpi_ec_mul_point (mpi_point_t result,
+ gcry_mpi_t scalar, mpi_point_t point,
mpi_ec_t ctx)
{
#if 0
@@ -632,7 +631,7 @@ _gcry_mpi_ec_mul_point (mpi_point_t *result,
#else
gcry_mpi_t x1, y1, z1, k, h, yy;
unsigned int i, loops;
- mpi_point_t p1, p2, p1inv;
+ mpi_point_struct p1, p2, p1inv;
x1 = mpi_alloc_like (ctx->p);
y1 = mpi_alloc_like (ctx->p);
diff --git a/mpi/mpiutil.c b/mpi/mpiutil.c
index 76630a6..d410d90 100644
--- a/mpi/mpiutil.c
+++ b/mpi/mpiutil.c
@@ -1,6 +1,7 @@
/* mpiutil.ac - Utility functions for MPI
* Copyright (C) 1998, 2000, 2001, 2002, 2003,
* 2007 Free Software Foundation, Inc.
+ * Copyright (C) 2013 g10 Code GmbH
*
* This file is part of Libgcrypt.
*
@@ -296,6 +297,24 @@ _gcry_mpi_alloc_like( gcry_mpi_t a )
}
+/* Set U into W and release U. If W is NULL only U will be released. */
+void
+gcry_mpi_snatch (gcry_mpi_t w, gcry_mpi_t u)
+{
+ if (w)
+ {
+ _gcry_mpi_assign_limb_space (w, u->d, u->alloced);
+ w->nlimbs = u->nlimbs;
+ w->sign = u->sign;
+ w->flags = u->flags;
+ u->alloced = 0;
+ u->nlimbs = 0;
+ u->d = NULL;
+ }
+ _gcry_mpi_free (u);
+}
+
+
gcry_mpi_t
gcry_mpi_set( gcry_mpi_t w, gcry_mpi_t u)
{
diff --git a/src/gcrypt.h.in b/src/gcrypt.h.in
index dae8d1c..7d2b89d 100644
--- a/src/gcrypt.h.in
+++ b/src/gcrypt.h.in
@@ -2,6 +2,7 @@
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
* 2006, 2007, 2008, 2009, 2010, 2011,
* 2012 Free Software Foundation, Inc.
+ * Copyright (C) 2012, 2013 g10 Code GmbH
*
* This file is part of Libgcrypt.
*
@@ -466,6 +467,9 @@ void gcry_mpi_release (gcry_mpi_t a);
/* Create a new number with the same value as A. */
gcry_mpi_t gcry_mpi_copy (const gcry_mpi_t a);
+/* Store the big integer value U in W and release U. */
+void gcry_mpi_snatch (gcry_mpi_t w, gcry_mpi_t u);
+
/* Store the big integer value U in W. */
gcry_mpi_t gcry_mpi_set (gcry_mpi_t w, const gcry_mpi_t u);
@@ -629,6 +633,7 @@ int gcry_mpi_get_flag (gcry_mpi_t a, enum gcry_mpi_flag flag);
while (0)
#define mpi_copy( a ) gcry_mpi_copy( (a) )
+#define mpi_snatch( w, u) gcry_mpi_snatch( (w), (u) )
#define mpi_set( w, u) gcry_mpi_set( (w), (u) )
#define mpi_set_ui( w, u) gcry_mpi_set_ui( (w), (u) )
#define mpi_cmp( u, v ) gcry_mpi_cmp( (u), (v) )
diff --git a/src/libgcrypt.def b/src/libgcrypt.def
index 9bf0167..cc49e74 100644
--- a/src/libgcrypt.def
+++ b/src/libgcrypt.def
@@ -211,3 +211,5 @@ EXPORTS
gcry_pk_get_param @193
gcry_kdf_derive @194
+
+ gcry_mpi_snatch @195
diff --git a/src/libgcrypt.vers b/src/libgcrypt.vers
index dcb3749..200f04e 100644
--- a/src/libgcrypt.vers
+++ b/src/libgcrypt.vers
@@ -86,7 +86,7 @@ GCRYPT_1.6 {
gcry_mpi_set_flag; gcry_mpi_set_highbit; gcry_mpi_set_opaque;
gcry_mpi_set_ui; gcry_mpi_snew; gcry_mpi_sub; gcry_mpi_sub_ui;
gcry_mpi_subm; gcry_mpi_swap; gcry_mpi_test_bit;
- gcry_mpi_lshift;
+ gcry_mpi_lshift; gcry_mpi_snatch;
local:
*;
diff --git a/src/mpi.h b/src/mpi.h
index 65a4f97..b3f19e5 100644
--- a/src/mpi.h
+++ b/src/mpi.h
@@ -108,6 +108,7 @@ struct gcry_mpi
#define mpi_is_secure(a) ((a) && ((a)->flags&1))
#define mpi_clear(a) _gcry_mpi_clear ((a))
#define mpi_alloc_like(a) _gcry_mpi_alloc_like((a))
+#define mpi_snatch(a,b) _gcry_mpi_snatch ((a),(b))
#define mpi_set(a,b) _gcry_mpi_set ((a),(b))
#define mpi_set_ui(a,b) _gcry_mpi_set_ui ((a),(b))
#define mpi_get_ui(a,b) _gcry_mpi_get_ui ((a),(b))
@@ -230,32 +231,37 @@ void _gcry_mpi_normalize( gcry_mpi_t a );
/*-- ec.c --*/
/* Object to represent a point in projective coordinates. */
-struct mpi_point_s;
-typedef struct mpi_point_s mpi_point_t;
-struct mpi_point_s
+struct gcry_mpi_point
{
gcry_mpi_t x;
gcry_mpi_t y;
gcry_mpi_t z;
};
+typedef struct gcry_mpi_point mpi_point_struct;
+typedef struct gcry_mpi_point *mpi_point_t;
+
+void _gcry_mpi_point_init (mpi_point_t p);
+void _gcry_mpi_point_free_parts (mpi_point_t p);
+void _gcry_mpi_get_point (gcry_mpi_t x, gcry_mpi_t y, gcry_mpi_t z,
+ mpi_point_t point);
+void _gcry_mpi_snatch_point (gcry_mpi_t x, gcry_mpi_t y, gcry_mpi_t z,
+ mpi_point_t point);
/* Context used with elliptic curve functions. */
struct mpi_ec_ctx_s;
typedef struct mpi_ec_ctx_s *mpi_ec_t;
-void _gcry_mpi_ec_point_init (mpi_point_t *p);
-void _gcry_mpi_ec_point_free (mpi_point_t *p);
mpi_ec_t _gcry_mpi_ec_init (gcry_mpi_t p, gcry_mpi_t a);
void _gcry_mpi_ec_free (mpi_ec_t ctx);
-int _gcry_mpi_ec_get_affine (gcry_mpi_t x, gcry_mpi_t y, mpi_point_t *point,
+int _gcry_mpi_ec_get_affine (gcry_mpi_t x, gcry_mpi_t y, mpi_point_t point,
mpi_ec_t ctx);
-void _gcry_mpi_ec_dup_point (mpi_point_t *result,
- mpi_point_t *point, mpi_ec_t ctx);
-void _gcry_mpi_ec_add_points (mpi_point_t *result,
- mpi_point_t *p1, mpi_point_t *p2,
+void _gcry_mpi_ec_dup_point (mpi_point_t result,
+ mpi_point_t point, mpi_ec_t ctx);
+void _gcry_mpi_ec_add_points (mpi_point_t result,
+ mpi_point_t p1, mpi_point_t p2,
mpi_ec_t ctx);
-void _gcry_mpi_ec_mul_point (mpi_point_t *result,
- gcry_mpi_t scalar, mpi_point_t *point,
+void _gcry_mpi_ec_mul_point (mpi_point_t result,
+ gcry_mpi_t scalar, mpi_point_t point,
mpi_ec_t ctx);
diff --git a/src/visibility.c b/src/visibility.c
index 2d3edbc..732f058 100644
--- a/src/visibility.c
+++ b/src/visibility.c
@@ -1,5 +1,6 @@
/* visibility.c - Wrapper for all public functions.
* Copyright (C) 2007, 2008, 2011 Free Software Foundation, Inc.
+ * Copyright (C) 2013 g10 Code GmbH
*
* This file is part of Libgcrypt.
*
@@ -261,6 +262,12 @@ gcry_mpi_copy (const gcry_mpi_t a)
return _gcry_mpi_copy (a);
}
+void
+gcry_mpi_snatch (gcry_mpi_t w, const gcry_mpi_t u)
+{
+ return _gcry_mpi_snatch (w, u);
+}
+
gcry_mpi_t
gcry_mpi_set (gcry_mpi_t w, const gcry_mpi_t u)
{
diff --git a/src/visibility.h b/src/visibility.h
index 4606a20..429c246 100644
--- a/src/visibility.h
+++ b/src/visibility.h
@@ -172,6 +172,7 @@
#define gcry_mpi_rshift _gcry_mpi_rshift
#define gcry_mpi_lshift _gcry_mpi_lshift
#define gcry_mpi_scan _gcry_mpi_scan
+#define gcry_mpi_snatch _gcry_mpi_snatch
#define gcry_mpi_set _gcry_mpi_set
#define gcry_mpi_set_bit _gcry_mpi_set_bit
#define gcry_mpi_set_flag _gcry_mpi_set_flag
@@ -378,6 +379,7 @@ gcry_err_code_t gcry_md_get (gcry_md_hd_t hd, int algo,
#undef gcry_mpi_rshift
#undef gcry_mpi_lshift
#undef gcry_mpi_scan
+#undef gcry_mpi_snatch
#undef gcry_mpi_set
#undef gcry_mpi_set_bit
#undef gcry_mpi_set_flag
@@ -544,6 +546,7 @@ MARK_VISIBLE (gcry_mpi_release)
MARK_VISIBLE (gcry_mpi_rshift)
MARK_VISIBLE (gcry_mpi_lshift)
MARK_VISIBLE (gcry_mpi_scan)
+MARK_VISIBLE (gcry_mpi_snatch)
MARK_VISIBLE (gcry_mpi_set)
MARK_VISIBLE (gcry_mpi_set_bit)
MARK_VISIBLE (gcry_mpi_set_flag)
--
1.7.7.1
--
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