-/** Number of bytes in an EdDSA public key. */
-#define DECAF_EDDSA_448_PUBLIC_BYTES 57
-
-/** Number of bytes in an EdDSA private key. */
-#define DECAF_EDDSA_448_PRIVATE_BYTES DECAF_EDDSA_448_PUBLIC_BYTES
-
-/** Number of bytes in an EdDSA private key. */
-#define DECAF_EDDSA_448_SIGNATURE_BYTES (DECAF_EDDSA_448_PUBLIC_BYTES + DECAF_EDDSA_448_PRIVATE_BYTES)
-
-/** Does EdDSA support non-contextual signatures? */
-#define DECAF_EDDSA_448_SUPPORTS_CONTEXTLESS_SIGS 0
-
-/** Prehash context renaming macros. */
-#define decaf_ed448_prehash_ctx_s decaf_shake256_ctx_s
-#define decaf_ed448_prehash_ctx_t decaf_shake256_ctx_t
-#define decaf_ed448_prehash_update decaf_shake256_update
-#define decaf_ed448_prehash_destroy decaf_shake256_destroy
-
-/** EdDSA encoding ratio. */
-#define DECAF_448_EDDSA_ENCODE_RATIO 4
-
-/** EdDSA decoding ratio. */
-#define DECAF_448_EDDSA_DECODE_RATIO (4 / 4)
-
-/**
- * @brief EdDSA key generation. This function uses a different (non-Decaf)
- * encoding.
- *
- * @param [out] pubkey The public key.
- * @param [in] privkey The private key.
- */
-void decaf_ed448_derive_public_key (
- uint8_t pubkey[DECAF_EDDSA_448_PUBLIC_BYTES],
- const uint8_t privkey[DECAF_EDDSA_448_PRIVATE_BYTES]
-) DECAF_NOINLINE;
-
-/**
- * @brief EdDSA signing.
- *
- * @param [out] signature The signature.
- * @param [in] privkey The private key.
- * @param [in] pubkey The public key.
- * @param [in] message The message to sign.
- * @param [in] message_len The length of the message.
- * @param [in] prehashed Nonzero if the message is actually the hash of something you want to sign.
- * @param [in] context A "context" for this signature of up to 255 bytes.
- * @param [in] context_len Length of the context.
- *
- * @warning For Ed25519, it is unsafe to use the same key for both prehashed and non-prehashed
- * messages, at least without some very careful protocol-level disambiguation. For Ed448 it is
- * safe. The C++ wrapper is designed to make it harder to screw this up, but this C code gives
- * you no seat belt.
- */
-void decaf_ed448_sign (
- uint8_t signature[DECAF_EDDSA_448_SIGNATURE_BYTES],
- const uint8_t privkey[DECAF_EDDSA_448_PRIVATE_BYTES],
- const uint8_t pubkey[DECAF_EDDSA_448_PUBLIC_BYTES],
- const uint8_t *message,
- size_t message_len,
- uint8_t prehashed,
- const uint8_t *context,
- uint8_t context_len
-) __attribute__((nonnull(1,2,3))) DECAF_NOINLINE;
-
-/**
- * @brief EdDSA signing with prehash.
- *
- * @param [out] signature The signature.
- * @param [in] privkey The private key.
- * @param [in] pubkey The public key.
- * @param [in] hash The hash of the message. This object will not be modified by the call.
- * @param [in] context A "context" for this signature of up to 255 bytes. Must be the same as what was used for the prehash.
- * @param [in] context_len Length of the context.
- *
- * @warning For Ed25519, it is unsafe to use the same key for both prehashed and non-prehashed
- * messages, at least without some very careful protocol-level disambiguation. For Ed448 it is
- * safe. The C++ wrapper is designed to make it harder to screw this up, but this C code gives
- * you no seat belt.
- */
-void decaf_ed448_sign_prehash (
- uint8_t signature[DECAF_EDDSA_448_SIGNATURE_BYTES],
- const uint8_t privkey[DECAF_EDDSA_448_PRIVATE_BYTES],
- const uint8_t pubkey[DECAF_EDDSA_448_PUBLIC_BYTES],
- const decaf_ed448_prehash_ctx_t hash,
- const uint8_t *context,
- uint8_t context_len
-) __attribute__((nonnull(1,2,3,4))) DECAF_NOINLINE;
-
-/**
- * @brief Prehash initialization, with contexts if supported.
- *
- * @param [out] hash The hash object to be initialized.
- */
-void decaf_ed448_prehash_init (
- decaf_ed448_prehash_ctx_t hash
-) __attribute__((nonnull(1))) DECAF_NOINLINE;