arc4 support; ok millert@, fgsch@

1 files changed, 27 insertions, 0 deletions

diff --git a/sys/crypto/arc4.h b/sys/crypto/arc4.h
new file mode 100644
index 00000000000..2bbf9227ceb
--- /dev/null
+++ b/sys/crypto/arc4.h
@@ -0,0 +1,27 @@
+/*	$OpenBSD: arc4.h,v 1.1 2003/10/07 07:07:14 markus Exp $	*/
+/*
+ * Copyright (c) 2003 Markus Friedl <markus@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#define RC4STATE 256
+#define RC4KEYLEN 16
+
+struct rc4_ctx {
+	u_int8_t x, y;
+	u_int8_t state[RC4STATE];
+};
+
+void	rc4_keysetup(struct rc4_ctx *, u_char *, u_int32_t);
+void	rc4_crypt(struct rc4_ctx *, u_char *, u_char *, u_int32_t);