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-rw-r--r--include/crypto/twofish.h23
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diff --git a/include/crypto/twofish.h b/include/crypto/twofish.h
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+++ b/include/crypto/twofish.h
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+#ifndef _CRYPTO_TWOFISH_H
+#define _CRYPTO_TWOFISH_H
+
+#include <linux/types.h>
+
+#define TF_MIN_KEY_SIZE 16
+#define TF_MAX_KEY_SIZE 32
+#define TF_BLOCK_SIZE 16
+
+struct crypto_tfm;
+
+/* Structure for an expanded Twofish key. s contains the key-dependent
+ * S-boxes composed with the MDS matrix; w contains the eight "whitening"
+ * subkeys, K[0] through K[7]. k holds the remaining, "round" subkeys. Note
+ * that k[i] corresponds to what the Twofish paper calls K[i+8]. */
+struct twofish_ctx {
+ u32 s[4][256], w[8], k[32];
+};
+
+int twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int key_len, u32 *flags);
+
+#endif