1 /* 2 * Copyright (c) 2017, The OpenThread Authors. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. Neither the name of the copyright holder nor the 13 * names of its contributors may be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /** 30 * @file 31 * This file implements the generating pskc function. 32 */ 33 34 #ifndef OTBR_UTILS_PSKC_HPP_ 35 #define OTBR_UTILS_PSKC_HPP_ 36 37 #include "openthread-br/config.h" 38 39 #define OT_EXTENDED_PAN_ID_LENGTH 8 40 #define OT_ITERATION_COUNTS 16384 41 #define OT_PASSPHRASE_MAX_LENGTH 255 42 #define OT_PBKDF2_SALT_MAX_LENGTH 30 43 #define OT_PSKC_LENGTH 16 44 45 #include <stdint.h> 46 #include <string.h> 47 48 #include <mbedtls/cmac.h> 49 50 namespace otbr { 51 namespace Psk { 52 53 enum 54 { 55 kPskcStatus_Ok = 0, 56 kPskcStatus_InvalidArgument = 1 57 }; 58 59 class Pskc 60 { 61 public: 62 /** 63 * This method computes the PSKc. 64 * 65 * @param[in] aExtPanId A pointer to extended PAN ID. 66 * @param[in] aNetworkName A pointer to network name. 67 * @param[in] aPassphrase A pointer to passphrase. 68 * 69 * @returns The pointer to PSKc value. 70 * 71 */ 72 const uint8_t *ComputePskc(const uint8_t *aExtPanId, const char *aNetworkName, const char *aPassphrase); 73 74 private: 75 void SetSalt(const uint8_t *aExtPanId, const char *aNetworkName); 76 77 char mSalt[OT_PBKDF2_SALT_MAX_LENGTH]; 78 uint16_t mSaltLen; 79 uint8_t mPskc[OT_PSKC_LENGTH]; 80 }; 81 82 } // namespace Psk 83 } // namespace otbr 84 85 #endif // OTBR_UTILS_PSKC_HPP_ 86