ed25519-hash-custom.h

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/*
    a custom hash must have a 512bit digest and implement:
 
    struct ed25519_hash_context;
 
    void ed25519_hash_init(ed25519_hash_context *ctx);
    void ed25519_hash_update(ed25519_hash_context *ctx, const uint8_t *in, size_t inlen);
    void ed25519_hash_final(ed25519_hash_context *ctx, uint8_t *hash);
    void ed25519_hash(uint8_t *hash, const uint8_t *in, size_t inlen);
*/