+void echo_large_nextBlock(echo_large_ctx_t* ctx, void* block);
+void echo_large_lastBlock(echo_large_ctx_t* ctx, void* block, uint16_t length_b);
+void echo_large_ctx2hash(void* dest, uint16_t length_b, echo_large_ctx_t* ctx);
+void echo384_ctx2hash(void* dest, echo_large_ctx_t* ctx);
+void echo512_ctx2hash(void* dest, echo_large_ctx_t* ctx);
+void echo384_init(echo_large_ctx_t* ctx);
+void echo512_init(echo_large_ctx_t* ctx);
+