50   std::vector<unsigned char> salt;  in main()  local
74         salt.clear();  in main()
75         salt.insert(salt.end(), optarg, &optarg[strlen(optarg)]);  in main()
78         if (!HashTreeBuilder::ParseBytesArrayFromString(optarg, &salt)) {  in main()
140   if (salt.empty()) {  in main()
141     salt.resize(builder.hash_size());  in main()
149     ssize_t ret = read(random_fd, salt.data(), salt.size());  in main()
150     if (ret != static_cast<ssize_t>(salt.size())) {  in main()
151       PLOG(ERROR) << "failed to read " << salt.size()  in main()
157   if (!generate_verity_tree(argv[0], argv[1], &builder, salt, kBlockSize,  in main()
165   std::string salt_string = HashTreeBuilder::BytesArrayToString(salt);  in main()