1 files changed, 37 insertions, 34 deletions

diff --git a/include/crypto/poly1305.h b/include/crypto/poly1305.h
index 34317ed2071e..190beb427c6d 100644
--- a/include/crypto/poly1305.h
+++ b/include/crypto/poly1305.h
@@ -7,58 +7,61 @@
 #define _CRYPTO_POLY1305_H
 
 #include <linux/types.h>
-#include <linux/crypto.h>
 
 #define POLY1305_BLOCK_SIZE	16
 #define POLY1305_KEY_SIZE	32
 #define POLY1305_DIGEST_SIZE	16
 
+/* The poly1305_key and poly1305_state types are mostly opaque and
+ * implementation-defined. Limbs might be in base 2^64 or base 2^26, or
+ * different yet. The union type provided keeps these 64-bit aligned for the
+ * case in which this is implemented using 64x64 multiplies.
+ */
+
 struct poly1305_key {
-	u32 r[5];	/* key, base 2^26 */
+	union {
+		u32 r[5];
+		u64 r64[3];
+	};
+};
+
+struct poly1305_core_key {
+	struct poly1305_key key;
+	struct poly1305_key precomputed_s;
 };
 
 struct poly1305_state {
-	u32 h[5];	/* accumulator, base 2^26 */
+	union {
+		u32 h[5];
+		u64 h64[3];
+	};
 };
 
-struct poly1305_desc_ctx {
-	/* key */
-	struct poly1305_key r;
-	/* finalize key */
-	u32 s[4];
+/* Combined state for block function. */
+struct poly1305_block_state {
 	/* accumulator */
 	struct poly1305_state h;
+	/* key */
+	union {
+		struct poly1305_key opaque_r[CONFIG_CRYPTO_LIB_POLY1305_RSIZE];
+		struct poly1305_core_key core_r;
+	};
+};
+
+struct poly1305_desc_ctx {
 	/* partial buffer */
 	u8 buf[POLY1305_BLOCK_SIZE];
 	/* bytes used in partial buffer */
 	unsigned int buflen;
-	/* r key has been set */
-	bool rset;
-	/* s key has been set */
-	bool sset;
+	/* finalize key */
+	u32 s[4];
+	struct poly1305_block_state state;
 };
 
-/*
- * Poly1305 core functions.  These implement the ε-almost-∆-universal hash
- * function underlying the Poly1305 MAC, i.e. they don't add an encrypted nonce
- * ("s key") at the end.  They also only support block-aligned inputs.
- */
-void poly1305_core_setkey(struct poly1305_key *key, const u8 *raw_key);
-static inline void poly1305_core_init(struct poly1305_state *state)
-{
-	memset(state->h, 0, sizeof(state->h));
-}
-void poly1305_core_blocks(struct poly1305_state *state,
-			  const struct poly1305_key *key,
-			  const void *src, unsigned int nblocks);
-void poly1305_core_emit(const struct poly1305_state *state, void *dst);
-
-/* Crypto API helper functions for the Poly1305 MAC */
-int crypto_poly1305_init(struct shash_desc *desc);
-unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx,
-					const u8 *src, unsigned int srclen);
-int crypto_poly1305_update(struct shash_desc *desc,
-			   const u8 *src, unsigned int srclen);
-int crypto_poly1305_final(struct shash_desc *desc, u8 *dst);
+void poly1305_init(struct poly1305_desc_ctx *desc,
+		   const u8 key[at_least POLY1305_KEY_SIZE]);
+void poly1305_update(struct poly1305_desc_ctx *desc,
+		     const u8 *src, unsigned int nbytes);
+void poly1305_final(struct poly1305_desc_ctx *desc, u8 *digest);
 
 #endif