1 // 2 // Copyright (C) 2022 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 #ifndef SECURE_ENV_TPM_FFI_H_ 17 #define SECURE_ENV_TPM_FFI_H_ 18 19 #include <stdint.h> 20 21 // C-based entrypoints for accessing TPM functionality, for use by Rust code. 22 // Rust equivalents are generated using `bindgen`. 23 24 #ifdef __cplusplus 25 extern "C" { 26 #endif 27 28 /** 29 * Provide an FFI-accessible version of `TpmHmacWithContext`. 30 * Returns 0 on success, 1 on error. 31 */ 32 uint32_t tpm_hmac(void* trm, const uint8_t* data, uint32_t data_len, 33 uint8_t* tag, uint32_t tag_len); 34 35 void secure_env_log(const char* file, unsigned int line, int severity, 36 const char* tag, const char* msg); 37 38 #ifdef __cplusplus 39 } 40 #endif 41 42 #endif // SECURE_ENV_TPM_FFI_H_ 43