1282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski/* 2282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Copyright (C) 2010 The Android Open Source Project 3282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 4282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Licensed under the Apache License, Version 2.0 (the "License"); 5282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * you may not use this file except in compliance with the License. 6282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * You may obtain a copy of the License at 7282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 8282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * http://www.apache.org/licenses/LICENSE-2.0 9282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 10282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Unless required by applicable law or agreed to in writing, software 11282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * distributed under the License is distributed on an "AS IS" BASIS, 12282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * See the License for the specific language governing permissions and 14282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * limitations under the License. 15282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski */ 16282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 17282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski#include <openssl/evp.h> 18282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 19282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski#include <sys/types.h> 20282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski#include <errno.h> 21282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski#include <fcntl.h> 22282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski#include <stdio.h> 23282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski#include <string.h> 24282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski#include <unistd.h> 25282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 26282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski/** 27282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Simple program to generate a key based on PBKDF2 with preset inputs. 28282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * 29282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski * Will print out the salt and key in hex. 30282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski */ 31282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 32282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski#define SALT_LEN 8 33282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski#define ROUNDS 1024 34282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski#define KEY_BITS 128 35282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 36282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinskiint main(int argc, char* argv[]) 37282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski{ 38282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski if (argc != 2) { 39282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski fprintf(stderr, "Usage: %s <password>\n", argv[0]); 40282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski exit(1); 41282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 42282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 43282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski int fd = open("/dev/urandom", O_RDONLY); 44282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski if (fd < 0) { 45282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski fprintf(stderr, "Could not open /dev/urandom: %s\n", strerror(errno)); 46282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski close(fd); 47282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski exit(1); 48282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 49282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 50282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski unsigned char salt[SALT_LEN]; 51282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 52282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski if (read(fd, &salt, SALT_LEN) != SALT_LEN) { 53282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski fprintf(stderr, "Could not read salt from /dev/urandom: %s\n", strerror(errno)); 54282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski close(fd); 55282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski exit(1); 56282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 57282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski close(fd); 58282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 59282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski unsigned char rawKey[KEY_BITS]; 60282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 61282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski if (PKCS5_PBKDF2_HMAC_SHA1(argv[1], strlen(argv[1]), salt, SALT_LEN, 62282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski ROUNDS, KEY_BITS, rawKey) != 1) { 63282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski fprintf(stderr, "Could not generate PBKDF2 output: %s\n", strerror(errno)); 64282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski exit(1); 65282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 66282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 67282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski printf("salt="); 68282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski for (int i = 0; i < SALT_LEN; i++) { 69282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski printf("%02x", salt[i]); 70282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 71282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski printf("\n"); 72282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski 73282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski printf("key="); 74282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski for (int i = 0; i < (KEY_BITS / 8); i++) { 75282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski printf("%02x", rawKey[i]); 76282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski } 77282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski printf("\n"); 78282e181b58cf72b6ca770dc7ca5f91f135444502Adam Lesinski} 79