332                           const std::string& salt, std::string* stretched) {  in stretchSecret()  argument
351                           reinterpret_cast<const uint8_t*>(salt.data()), salt.size(), 1 << Nf,  in stretchSecret()
365                           const std::string& salt, const std::string& secdiscardable_hash,  in generateAppId()  argument
368     if (!stretchSecret(stretching, auth.secret, salt, &stretched)) return false;  in generateAppId()
493     std::string salt;  in storeKey()  local
495         if (ReadRandomBytes(SALT_BYTES, salt) != OK) {  in storeKey()
499         if (!writeStringToFile(salt, dir + "/" + kFn_salt)) return false;  in storeKey()
502     if (!generateAppId(auth, stretching, salt, secdiscardable_hash, &appId)) return false;  in storeKey()
555     std::string salt;  in retrieveKey()  local
557         if (!readFileToString(dir + "/" + kFn_salt, &salt)) return false;  in retrieveKey()
560     if (!generateAppId(auth, stretching, salt, secdiscardable_hash, &appId)) return false;  in retrieveKey()