ripemd160_process
ret = ripemd160_process(ctx, ctx->ripemd160_buffer); EG(ret, err);
ret = ripemd160_process(ctx, data_ptr); EG(ret, err);
ret = ripemd160_process(ctx, last_padded_block); EG(ret, err);
ret = ripemd160_process(ctx, last_padded_block + RIPEMD160_BLOCK_SIZE); EG(ret, err);
ret = ripemd160_process(ctx, last_padded_block); EG(ret, err);