1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Permission is hereby granted, free of charge, to any person 5 * obtaining a copy of this software and associated documentation 6 * files (the "Software"), to deal in the Software without 7 * restriction, including without limitation the rights to use, copy, 8 * modify, merge, publish, distribute, sublicense, and/or sell copies 9 * of the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 24 25 #ifndef OPENSSL_OPS_H_ 26 #define OPENSSL_OPS_H_ 27 28 #include "atap_ops_delegate.h" 29 30 namespace atap { 31 32 // A partial delegate implementation which implements all crypto ops with 33 // openssl. All instances of this class must be created on the same thread. 34 class OpensslOps : public AtapOpsDelegate { 35 public: 36 OpensslOps(); 37 ~OpensslOps() override; 38 39 // Overridden AtapOpsDelegate methods. 40 AtapResult get_random_bytes(uint8_t* buf, uint32_t buf_size) override; 41 42 AtapResult ecdh_shared_secret_compute( 43 AtapCurveType curve, 44 const uint8_t other_public_key[ATAP_ECDH_KEY_LEN], 45 uint8_t public_key[ATAP_ECDH_KEY_LEN], 46 uint8_t shared_secret[ATAP_ECDH_KEY_LEN]) override; 47 48 AtapResult aes_gcm_128_encrypt(const uint8_t* plaintext, 49 uint32_t len, 50 const uint8_t iv[ATAP_GCM_IV_LEN], 51 const uint8_t key[ATAP_AES_128_KEY_LEN], 52 uint8_t* ciphertext, 53 uint8_t tag[ATAP_GCM_TAG_LEN]) override; 54 55 AtapResult aes_gcm_128_decrypt(const uint8_t* ciphertext, 56 uint32_t len, 57 const uint8_t iv[ATAP_GCM_IV_LEN], 58 const uint8_t key[ATAP_AES_128_KEY_LEN], 59 const uint8_t tag[ATAP_GCM_TAG_LEN], 60 uint8_t* plaintext) override; 61 62 AtapResult sha256(const uint8_t* plaintext, 63 uint32_t plaintext_len, 64 uint8_t hash[ATAP_SHA256_DIGEST_LEN]) override; 65 66 AtapResult hkdf_sha256(const uint8_t* salt, 67 uint32_t salt_len, 68 const uint8_t* ikm, 69 uint32_t ikm_len, 70 const uint8_t* info, 71 uint32_t info_len, 72 uint8_t* okm, 73 int32_t okm_len) override; 74 75 // Can be used during testing to get predictable 'ephemeral' ECDH keys. This 76 // must never be called except during testing. For X25519, the expected format 77 // is a 32-byte private key. For P256, the expected format is X9.62 DER. 78 void SetEcdhKeyForTesting(const void* key_data, size_t size_in_bytes); 79 80 private: 81 uint8_t test_key_[512]; 82 size_t test_key_size_{0}; 83 }; 84 85 } // namespace atap 86 87 #endif /* OPENSSL_OPS_H_ */ 88