54 std::string Errno() { return std::string(": ") + strerror(errno); }  in Errno()
57 void DeleteRecursively(const std::string &path) {  in DeleteRecursively()
61   std::unique_ptr<DIR, int (*)(DIR *)> dirp(opendir(path.c_str()), closedir);  in DeleteRecursively()
68       std::string filename(entry->d_name);  in DeleteRecursively()
78 void RandomBytesForTesting(std::vector<uint8_t> &bytes) {  in RandomBytesForTesting()
85 std::vector<uint8_t> GenerateTestKey(size_t size) {  in GenerateTestKey()
86   std::vector<uint8_t> key(size);  in GenerateTestKey()
91 std::string BytesToHex(const std::vector<uint8_t> &bytes) {  in BytesToHex()
92   std::ostringstream o;  in BytesToHex()
94     o << std::hex << std::setw(2) << std::setfill('0') << (int)b;  in BytesToHex()
114 static bool GetFsBlockDeviceAndType(const std::string &mountpoint,  in GetFsBlockDeviceAndType()
115                                     std::string *fs_blk_device,  in GetFsBlockDeviceAndType()
116                                     std::string *fs_type) {  in GetFsBlockDeviceAndType()
117   std::unique_ptr<FILE, int (*)(FILE *)> mnts(setmntent("/proc/mounts", "re"),  in GetFsBlockDeviceAndType()
140 static bool GetFilesystemUuid(const std::string &fs_blk_device,  in GetFilesystemUuid()
141                               const std::string &fs_type,  in GetFilesystemUuid()
205 static bool GetRawBlockDevice(const std::string &fs_blk_device,  in GetRawBlockDevice()
206                               std::string *raw_blk_device) {  in GetRawBlockDevice()
216   const std::optional<std::string> name =  in GetRawBlockDevice()
224   std::vector<DeviceMapper::TargetInfo> table;  in GetRawBlockDevice()
236   const std::string target_type = dm.GetTargetType(table[0].spec);  in GetRawBlockDevice()
244   std::optional<std::string> parent =  in GetRawBlockDevice()
255 bool GetFilesystemInfo(const std::string &mountpoint, FilesystemInfo *info) {  in GetFilesystemInfo()
281 bool VerifyDataRandomness(const std::vector<uint8_t> &bytes) {  in VerifyDataRandomness()
285   size_t destLen = bytes.size() - std::min<size_t>(4, bytes.size());  in VerifyDataRandomness()
286   std::vector<uint8_t> dest(destLen);  in VerifyDataRandomness()
310                                    const std::string &master_key_string,  in TryPrepareHwWrappedKey()
311                                    std::string *exported_key_string,  in TryPrepareHwWrappedKey()
321   std::string wrapped_key_blob;  in TryPrepareHwWrappedKey()
335 bool CreateHwWrappedKey(std::vector<uint8_t> *master_key,  in CreateHwWrappedKey()
336                         std::vector<uint8_t> *exported_key) {  in CreateHwWrappedKey()
344   std::string master_key_string(master_key->begin(), master_key->end());  in CreateHwWrappedKey()
345   std::string exported_key_string;  in CreateHwWrappedKey()
361 static void PushBigEndian32(uint32_t val, std::vector<uint8_t> *vec) {  in PushBigEndian32()
368                                 const std::vector<uint8_t> &label,  in GetFixedInputString()
369                                 const std::vector<uint8_t> &context,  in GetFixedInputString()
371                                 std::vector<uint8_t> *fixed_input_string) {  in GetFixedInputString()
381 static bool AesCmacKdfHelper(const std::vector<uint8_t> &key,  in AesCmacKdfHelper()
382                              const std::vector<uint8_t> &label,  in AesCmacKdfHelper()
383                              const std::vector<uint8_t> &context,  in AesCmacKdfHelper()
385                              std::vector<uint8_t> *output_data) {  in AesCmacKdfHelper()
388     std::vector<uint8_t> fixed_input_string;  in AesCmacKdfHelper()
402 bool DeriveHwWrappedEncryptionKey(const std::vector<uint8_t> &master_key,  in DeriveHwWrappedEncryptionKey()
403                                   std::vector<uint8_t> *enc_key) {  in DeriveHwWrappedEncryptionKey()
404   std::vector<uint8_t> label{0x00, 0x00, 0x40, 0x00, 0x00, 0x00,  in DeriveHwWrappedEncryptionKey()
408   std::vector<uint8_t> context = {  in DeriveHwWrappedEncryptionKey()
419 bool DeriveHwWrappedRawSecret(const std::vector<uint8_t> &master_key,  in DeriveHwWrappedRawSecret()
420                               std::vector<uint8_t> *secret) {  in DeriveHwWrappedRawSecret()
421   std::vector<uint8_t> label{0x00, 0x00, 0x40, 0x00, 0x00, 0x00,  in DeriveHwWrappedRawSecret()
425   std::vector<uint8_t> context = {'r',  'a',  'w',  ' ',  's',  'e',  'c',  in DeriveHwWrappedRawSecret()