X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/ba6e6b64033b1f9de49feccb5c9cd438354481f7..0f00dc4c8eb47e67bc0f148c2dd109f73a451e0a:/symm/gcipher.h

diff --git a/symm/gcipher.h b/symm/gcipher.h
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+/* -*-c-*-
+ *
+ * Generic symmetric cipher interface
+ *
+ * (c) 1999 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * Catacomb 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#ifndef CATACOMB_GCIPHER_H
+#define CATACOMB_GCIPHER_H
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <stddef.h>
+
+#include <mLib/bits.h>
+
+#ifndef CATACOMB_KEYSZ_H
+#  include "keysz.h"
+#endif
+
+/*----- Generic symmetric cipher interface --------------------------------*/
+
+typedef struct gcipher {
+  const struct gcipher_ops *ops;	/* Pointer to cipher operations */
+} gcipher;
+
+typedef struct gcipher_ops {
+  const struct gccipher *c;		/* Pointer to cipher class */
+  void (*encrypt)(gcipher */*c*/, const void */*s*/,
+		  void */*t*/, size_t /*sz*/);
+  void (*decrypt)(gcipher */*c*/, const void */*s*/,
+		  void */*t*/, size_t /*sz*/);
+  void (*destroy)(gcipher */*c*/);
+  void (*setiv)(gcipher */*c*/, const void */*iv*/);
+  void (*bdry)(gcipher */*c*/);
+} gcipher_ops;
+
+typedef struct gccipher {
+  const char *name;			/* Cipher name */
+  const octet *keysz;			/* Preferred key size table */
+  size_t blksz;				/* Block size or zero if none */
+  gcipher *(*init)(const void */*k*/, size_t /*sz*/);
+} gccipher;
+
+#define GC_INIT(cc, k, sz)	(cc)->init((k), (sz))
+#define GC_CLASS(cc)		(cc)->ops->c
+#define GC_ENCRYPT(c, s, t, sz)	(c)->ops->encrypt((c), (s), (t), (sz))
+#define GC_DECRYPT(c, s, t, sz)	(c)->ops->decrypt((c), (s), (t), (sz))
+#define GC_DESTROY(c)		(c)->ops->destroy((c))
+#define GC_SETIV(c, iv)		(c)->ops->setiv((c), (iv))
+#define GC_BDRY(c)		(c)->ops->bdry((c))
+
+/*----- Tables ------------------------------------------------------------*/
+
+extern const gccipher *const gciphertab[];
+
+/* --- @gcipher_byname@ --- *
+ *
+ * Arguments:	@const char *p@ = pointer to name string
+ *
+ * Returns:	The named cipher class, or null.
+ */
+
+extern const gccipher *gcipher_byname(const char */*p*/);
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif