1 /** 2 * Copyright (c) 2018 Oticon A/S 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 #ifndef BLE_CRYPT_IF_H 20 #define BLE_CRYPT_IF_H 21 22 #include <stdbool.h> 23 #include <stdint.h> 24 25 #ifdef __cplusplus 26 extern "C" { 27 #endif 28 29 void BLECrypt_if_encrypt_packet(uint8_t packet_first_header_byte, // First byte of packet header 30 const uint8_t* unecrypted_payload, // Packet payload to be encrypted 31 uint8_t* encrypted_payload, //encrypted payload (and MIC if generate_mic==1) 32 int length, //including MIC length if ( generate_mic == 1 ) ; [ just the length in the packet header ] 33 bool generate_mic, //we have MIC, or not 34 const uint8_t* sk, // Session key (16 bytes, BIG-ENDIAN) 35 const uint8_t* nonce // CCM Nonce (NONCE_LEN bytes, little-endian) 36 ); 37 38 void BLECrypt_if_decrypt_packet(uint8_t packet_1st_header_byte, // First byte of packet header (or just LLID and RFU (RFU=0 for BLE v4.x) - other bits are ignored) 39 const uint8_t* encrypted_packet_payload, //as received from the air (including a MIC if has_mic) 40 uint8_t* decrypted_packet_payload, 41 int length, //including MIC lenght if (has_mic == 1) ; [ just the length in the packet header ] 42 bool has_mic, 43 const uint8_t* sk, // Session key (16 bytes, BIG-ENDIAN) 44 const uint8_t* nonce, // CCM Nonce (NONCE_LEN bytes, little-endian) 45 uint8_t *mic_error /*was there a mic error in the packet (only if has_mic==1)*/ 46 ); 47 48 void BLECrypt_if_aes_128( 49 // Inputs 50 const uint8_t *key_be, // Key (KEY_LEN bytes, big-endian) 51 const uint8_t *plaintext_data_be, // Plaintext data (KEY_LEN bytes, big-endian) 52 // Outputs (the pointers themselves are inputs and must point to large enough areas) 53 uint8_t *encrypted_data_be); // Plaintext data (KEY_LEN bytes, big-endian) 54 55 void BLECrypt_if_aes_ecb( 56 // Inputs 57 const uint8_t *key_be, // Key (KEY_LEN bytes, big-endian) 58 size_t key_size, // Key size in bits 59 const uint8_t *plaintext_data_be, // Plaintext data (128bits/16Bytes, big-endian) 60 // Outputs (the pointers themselves are inputs and must point to large enough areas) 61 uint8_t *encrypted_data_be); 62 63 void BLECrypt_if_encrypt_packet_v3(uint8_t *adata, 64 int alen, 65 int mlen, 66 int maclen, 67 int noncelen, 68 const uint8_t *mdata, 69 const uint8_t *sk, 70 const uint8_t *ccm_nonce, 71 uint8_t *encrypted_packet_payload_and_mac); 72 73 int BLECrypt_if_decrypt_packet_v3(uint8_t *adata, 74 int alen, 75 int mlen, 76 int maclen, 77 int noncelen, 78 const uint8_t *mdata_and_mac, 79 const uint8_t *sk, 80 const uint8_t *ccm_nonce, 81 int no_mac, 82 uint8_t *decrypted_packet_payload); 83 #ifdef __cplusplus 84 } 85 #endif 86 87 #endif 88
