Rearrange the file tree.

[u/mdw/catacomb] / symm / gmac.h

diff --git a/symm/gmac.h b/symm/gmac.h
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+/* -*-c-*-
+ *
+ * Generic MAC function 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_GMAC_H
+#define CATACOMB_GMAC_H
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <stddef.h>
+
+#ifndef CATACOMB_GCIPHER_H
+#  include "gcipher.h"
+#endif
+
+#ifndef CATACOMB_GHASH_H
+#  include "ghash.h"
+#endif
+
+/*----- Generic MAC function interface ------------------------------------*/
+
+typedef struct gmac {
+  const struct gmac_ops *ops;          /* Pointer to MAC operations */
+} gmac;
+
+typedef struct gmac_ops {
+  const struct gcmac *c;               /* Pointer to MAC class */
+  ghash *(*init)(gmac */*m*/);         /* Create keyed hash instance */
+  void (*destroy)(gmac */*m*/);                /* Destroy MAC key block */
+} gmac_ops;
+
+typedef struct gcmac {
+  const char *name;                    /* Name of the MAC function */
+  size_t hashsz;                       /* Size of output hash */
+  const octet *keysz;                  /* Key size options */
+  gmac *(*key)(const void */*k*/, size_t /*sz*/); /* Create key */
+} gcmac;
+
+#define GM_KEY(cm, k, ksz)     (cm)->key((k), (ksz))
+#define GM_CLASS(km)           (km)->ops->c
+#define GM_INIT(km)            (km)->ops->init((km))
+#define GM_DESTROY(km)         (km)->ops->destroy((km))
+
+/*----- Tables ------------------------------------------------------------*/
+
+extern const gcmac *const gmactab[];
+
+/* --- @gmac_byname@ --- *
+ *
+ * Arguments:  @const char *p@ = pointer to name string
+ *
+ * Returns:    The named cipher class, or null.
+ */
+
+extern const gcmac *gmac_byname(const char */*p*/);
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif