1 files changed, 80 insertions, 0 deletions
diff --git a/cipher/ecc-common.h b/cipher/ecc-common.h
new file mode 100644
index 00000000..94da73e1
--- /dev/null
+++ b/cipher/ecc-common.h
@@ -0,0 +1,80 @@
+/* ecc-common.h - Declarations of common ECC code
+ * 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/>.
+ */
+
+#ifndef GCRY_ECC_COMMON_H
+#define GCRY_ECC_COMMON_H
+
+/* 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_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_struct Q; /* Q = [d]G  */
+} ECC_public_key;
+
+
+typedef struct
+{
+  elliptic_curve_t E;
+  mpi_point_struct Q;
+  gcry_mpi_t d;
+} ECC_secret_key;
+
+
+
+/* Set the value from S into D.  */
+static inline void
+point_set (mpi_point_t d, mpi_point_t s)
+{
+  mpi_set (d->x, s->x);
+  mpi_set (d->y, s->y);
+  mpi_set (d->z, s->z);
+}
+
+
+/*-- ecc-curves.c --*/
+gpg_err_code_t _gcry_ecc_fill_in_curve (unsigned int nbits,
+                                        const char *name,
+                                        elliptic_curve_t *curve,
+                                        unsigned int *r_nbits);
+
+const char *_gcry_ecc_get_curve (gcry_mpi_t *pkey,
+                                 int iterator,
+                                 unsigned int *r_nbits);
+gcry_err_code_t _gcry_ecc_get_param (const char *name, gcry_mpi_t *pkey);
+gcry_sexp_t     _gcry_ecc_get_param_sexp (const char *name);
+
+/*-- ecc-misc.c --*/
+void _gcry_ecc_curve_free (elliptic_curve_t *E);
+elliptic_curve_t _gcry_ecc_curve_copy (elliptic_curve_t E);
+gcry_mpi_t   _gcry_ecc_ec2os (gcry_mpi_t x, gcry_mpi_t y, gcry_mpi_t p);
+gcry_error_t _gcry_ecc_os2ec (mpi_point_t result, gcry_mpi_t value);
+
+
+#endif /*GCRY_ECC_COMMON_H*/