1 files changed, 74 insertions, 0 deletions
diff --git a/rijndael.h b/rijndael.h
new file mode 100644
index 0000000..a1694d2
--- /dev/null
+++ b/rijndael.h
@@ -0,0 +1,74 @@
+/*
+ * Highly portable ANSI C implementation of Rijndael cipher.
+ * Written by Kaz Kylheku.
+ */
+
+#ifndef RIJNDAEL_H
+#define RIJNDAEL_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RIJN_MAX_ROUNDS 14
+
+/*
+ * Constants representing choice of Rijndael key or block size,
+ * either of which can be 128 bits, 192 bits or 256 bits.
+ */
+
+typedef enum {
+	rijn_128 = 4, 	/* number of rows */
+	rijn_192 = 6,
+	rijn_256 = 8
+} rijn_size_t;
+
+/*
+ * Rijndael parameters.
+ */
+
+typedef struct {
+	rijn_size_t rijn_blockrows;
+	rijn_size_t rijn_keyrows;
+} rijn_param_t;
+
+#define RIJN_PARAM_DEFAULT_INITIALIZER { rijn_128, rijn_256 }
+#define RIJN_PARAM_INITIALIZER(BLOCKSZ, KEYSZ) { (BLOCKSZ), (KEYSZ) }
+
+void rijn_param_init(rijn_param_t *, rijn_size_t blocksz, rijn_size_t keysz);
+
+/*
+ * Rijndael keys are 128, 192 or 256 bits wide.  There are up to
+ * RIJN_MAX_ROUNDS + 1 round keys needed, so the schedule is that big.
+ */
+
+typedef unsigned char rijn_unit_t[4];
+typedef rijn_unit_t rijn_key_t[8];
+typedef rijn_unit_t rijn_block_t[8];
+typedef unsigned char rijn_flatblock_t[sizeof (rijn_block_t)];
+
+typedef struct {
+	rijn_param_t rijn_param;
+	int rijn_nrounds;
+	rijn_block_t rijn_roundkey[RIJN_MAX_ROUNDS];
+} rijn_keysched_t;
+
+void rijn_sched_key(rijn_keysched_t *, rijn_key_t *, const rijn_param_t *);
+void rijn_encrypt(rijn_keysched_t *, unsigned char *, const unsigned char *);
+void rijn_decrypt(rijn_keysched_t *, unsigned char *, const unsigned char *);
+void rijn_cbc_encrypt(rijn_keysched_t *, unsigned char *iv, unsigned char *out, 
+		const unsigned char *in, size_t nblocks);
+void rijn_cbc_decrypt(rijn_keysched_t *, unsigned char *iv, unsigned char *out,
+		const unsigned char *in, size_t nblocks);
+void rijn_cfb_encrypt(rijn_keysched_t *, unsigned char *iv, unsigned char *out,
+		const unsigned char *pt, size_t nbytes);
+void rijn_cfb_decrypt(rijn_keysched_t *, unsigned char *iv, unsigned char *out,
+		const unsigned char *in, size_t nbytes);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif