248 static bool stretchingNeedsSalt(const std::string& stretching) {  in stretchingNeedsSalt()  argument
249     return stretching != kStretch_nopassword && stretching != kStretch_none;  in stretchingNeedsSalt()
252 static bool stretchSecret(const std::string& stretching, const std::string& secret,  in stretchSecret()  argument
254     if (stretching == kStretch_nopassword) {  in stretchSecret()
260     } else if (stretching == kStretch_none) {  in stretchSecret()
263                           stretching.begin())) {  in stretchSecret()
265         if (!parse_scrypt_parameters(stretching.substr(kStretchPrefix_scrypt.size()).c_str(), &Nf,  in stretchSecret()
267             LOG(ERROR) << "Unable to parse scrypt params in stretching: " << stretching;  in stretchSecret()
275             LOG(ERROR) << "scrypt failed with params: " << stretching;  in stretchSecret()
279         LOG(ERROR) << "Unknown stretching type: " << stretching;  in stretchSecret()
285 static bool generateAppId(const KeyAuthentication& auth, const std::string& stretching,  in generateAppId()  argument
289     if (!stretchSecret(stretching, auth.secret, salt, &stretched)) return false;  in generateAppId()
412     std::string stretching = getStretching(auth);  in storeKey()  local
413     if (!writeStringToFile(stretching, dir + "/" + kFn_stretching)) return false;  in storeKey()
415     if (stretchingNeedsSalt(stretching)) {  in storeKey()
423     if (!generateAppId(auth, stretching, salt, secdiscardable, &appId)) return false;  in storeKey()
449     std::string stretching;  in retrieveKey()  local
450     if (!readFileToString(dir + "/" + kFn_stretching, &stretching)) return false;  in retrieveKey()
452     if (stretchingNeedsSalt(stretching)) {  in retrieveKey()
456     if (!generateAppId(auth, stretching, salt, secdiscardable, &appId)) return false;  in retrieveKey()