1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "ScryptParameters.h" 18 19 #include <stdlib.h> 20 #include <string.h> 21 22 bool parse_scrypt_parameters(const char* paramstr, int *Nf, int *rf, int *pf) { 23 int params[3] = {}; 24 char *token; 25 char *saveptr; 26 int i; 27 28 /* 29 * The token we're looking for should be three integers separated by 30 * colons (e.g., "12:8:1"). Scan the property to make sure it matches. 31 */ 32 for (i = 0, token = strtok_r(const_cast<char *>(paramstr), ":", &saveptr); 33 token != nullptr && i < 3; 34 i++, token = strtok_r(nullptr, ":", &saveptr)) { 35 char *endptr; 36 params[i] = strtol(token, &endptr, 10); 37 38 /* 39 * Check that there was a valid number and it's 8-bit. 40 */ 41 if ((*token == '\0') || (*endptr != '\0') || params[i] < 0 || params[i] > 255) { 42 return false; 43 } 44 } 45 if (token != nullptr) { 46 return false; 47 } 48 *Nf = params[0]; *rf = params[1]; *pf = params[2]; 49 return true; 50 } 51
