pmt: initial 3.0.2 update

include/libgnulib/arctwo.h

@@ -0,0 +1,71 @@
+/* arctwo.h --- The arctwo block cipher
+ * Copyright (C) 2000-2003, 2005, 2009-2024 Free Software Foundation, Inc.
+ *
+ * This file 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.
+ *
+ * This file 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 <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/* Code from Libgcrypt adapted for gnulib by Simon Josefsson. */
+
+#ifndef ARCTWO_H
+#define ARCTWO_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+typedef struct
+{
+  uint16_t S[64];
+} arctwo_context;
+
+#define ARCTWO_BLOCK_SIZE 8
+
+/* Initialize CONTEXT using KEY of KEYLEN length.  If
+   EFFECTIVE_KEYLEN, truncate the key (using a special algorithm) to
+   only be of EFFECTIVE_KEYLEN bits.  Normally, you use
+   EFFECTIVE_KEYLEN of 0, but see RFC 2268 for more information. */
+void
+arctwo_setkey_ekb (arctwo_context *context,
+                   size_t keylen, const char *key, size_t effective_keylen);
+
+#define arctwo_setkey(context,keylen,key) \
+  arctwo_setkey_ekb (context, keylen, key, 8 * (keylen))
+
+/* Encrypt INBUF of size LENGTH into OUTBUF.  LENGTH must be a
+   multiple of ARCTWO_BLOCK_SIZE.  CONTEXT hold the encryption key,
+   and must have been initialized with arctwo_setkey or
+   arctwo_setkey_ekb. */
+extern void
+arctwo_encrypt (arctwo_context *context, const char *inbuf,
+                char *restrict outbuf, size_t length);
+
+/* Decrypt INBUF of size LENGTH into OUTBUF.  LENGTH must be a
+   multiple of ARCTWO_BLOCK_SIZE.  CONTEXT hold the decryption key,
+   and must have been initialized with arctwo_setkey or
+   arctwo_setkey_ekb. */
+extern void
+arctwo_decrypt (arctwo_context *context, const char *inbuf,
+                char *restrict outbuf, size_t length);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ARCTWO_H */