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
parse_scrypt_parameters(const char * paramstr,int * Nf,int * rf,int * pf)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; i++, token = strtok_r(nullptr, ":", &saveptr)) {
34 char* endptr;
35 params[i] = strtol(token, &endptr, 10);
36
37 /*
38 * Check that there was a valid number and it's 8-bit.
39 */
40 if ((*token == '\0') || (*endptr != '\0') || params[i] < 0 || params[i] > 255) {
41 return false;
42 }
43 }
44 if (token != nullptr) {
45 return false;
46 }
47 *Nf = params[0];
48 *rf = params[1];
49 *pf = params[2];
50 return true;
51 }
52