static eEsifError DataVault_ReadPayload(DataVaultPtr self)
{
eEsifError rc = ESIF_OK;
IOStreamPtr streamPtr = NULL;
int vrc = EPERM;
size_t fileOffset = 0;
size_t curFileOffset = 0;
size_t pairSize = 0;
esif_flags_t item_flags = 0;
EsifData key = { ESIF_DATA_STRING };
EsifData value = { ESIF_DATA_VOID };
ESIF_ASSERT(self != NULL);
streamPtr = self->stream;
// Open File or Memory Block
if ((vrc = IOStream_Open(streamPtr)) != 0) {
if (vrc == ENOENT) {
rc = ESIF_E_NOT_FOUND;
}
else {
rc = ESIF_E_IO_OPEN_FAILED;
}
goto exit;
}
// Move the file pointer to start of data
fileOffset = sizeof(DataVaultHeader);
if (IOStream_Seek(streamPtr, fileOffset, SEEK_SET) != EOK) {
rc = ESIF_E_IO_ERROR;
goto exit;
}
// Read Data and add to DataVault
while (rc == ESIF_OK) {
EsifData_ctor(&key);
EsifData_ctor(&value);
item_flags = 0;
rc = DataVault_ReadNextKeyValuePair(self, &item_flags, &key, &value);
if (rc != ESIF_OK) {
if (ESIF_E_ITERATION_DONE == rc) {
rc = ESIF_OK;
}
break;
}
// Validate that the data read is from within the region specified by the header
curFileOffset = IOStream_GetOffset(streamPtr);
pairSize = curFileOffset - fileOffset;
fileOffset = curFileOffset;
// Add value (including allocated buf_ptr) to cache
DataCache_InsertValue(self->cache, (esif_string)key.buf_ptr, &value, item_flags);
EsifData_dtor(&key);
EsifData_dtor(&value);
}
exit:
IOStream_Close(streamPtr);
EsifData_dtor(&key);
EsifData_dtor(&value);
return rc;
}
// Read DataVault from Disk
eEsifError DataVault_ReadVault (DataVaultPtr self)
{
eEsifError rc = ESIF_E_UNSPECIFIED; // TODO
int vrc = EPERM;
DataVaultHeader header;
UInt32 min_version;
UInt32 max_version;
esif_flags_t item_flags;
IOStreamPtr vault = self->stream;
// TODO: Locking
// Open File or Memory Block
if ((vrc = IOStream_Open(vault)) != 0) {
if (vrc == ENOENT) {
rc = ESIF_E_NOT_FOUND;
}
return rc;
}
// Read and Verify File Header
// The DataVault's Major.Minor Version must be <= the App's Major.Minor Version and at least Major.0
memset(&header, 0, sizeof(header));
IOStream_Read(vault, &header, 4); // E51F#### where #### is header size, including this
IOStream_Read(vault, ((UInt8*)&header) + 4, esif_ccb_min(header.headersize, sizeof(header)) - 4);
min_version = ESIFDV_VERSION(ESIFDV_MAJOR_VERSION, 0, 0);
max_version = ESIFDV_VERSION(ESIFDV_MAJOR_VERSION, ESIFDV_MINOR_VERSION, ESIFDV_MAX_REVISION);
if (memcmp(header.signature, ESIFDV_SIGNATURE, sizeof(header.signature)) != 0 || header.version > max_version || header.version < min_version) {
IOStream_Close(vault);
return ESIF_E_NOT_SUPPORTED;
}
if (header.headersize > sizeof(header)) {
IOStream_Seek(vault, header.headersize - sizeof(header), SEEK_CUR);
}
self->flags = header.flags;
if (IOStream_GetType(vault) == StreamMemory) {
self->flags |= ESIF_SERVICE_CONFIG_STATIC;
}
rc = ESIF_OK;
// Read Data and add to DataVault
while (IOStream_Read(vault, &item_flags, sizeof(item_flags)) == sizeof(item_flags)) {
EsifData key;
EsifData value;
// Read Key
EsifData_ctor(&key);
EsifData_ctor(&value);
key.type = ESIF_DATA_STRING;
IOStream_Read(vault, &key.data_len, sizeof(key.data_len));
if (key.data_len > MAX_DV_DATALEN) {
rc = ESIF_E_PARAMETER_IS_OUT_OF_BOUNDS;
break;
}
switch (IOStream_GetType(vault)) {
case StreamMemory:
key.buf_len = 0;
key.buf_ptr = IOStream_GetMemoryBuffer(vault) + IOStream_GetOffset(vault);
IOStream_Seek(vault, key.data_len, SEEK_CUR);
item_flags &= ~ESIF_SERVICE_CONFIG_NOCACHE; // ignore for Memory Vaults
break;
case StreamFile:
default:
key.buf_len = key.data_len;
key.buf_ptr = esif_ccb_malloc(key.buf_len);
if (!key.buf_ptr) {
rc = ESIF_E_NO_MEMORY;
break;
}
IOStream_Read(vault, key.buf_ptr, key.data_len);
((esif_string)(key.buf_ptr))[key.data_len - 1] = 0;
break;
}
if (rc != ESIF_OK) {
EsifData_dtor(&key);
break;
}
// Read Value
IOStream_Read(vault, &value.type, sizeof(value.type));
IOStream_Read(vault, &value.data_len, sizeof(value.data_len));
if (value.data_len > MAX_DV_DATALEN) {
EsifData_dtor(&key);
break;
}
// If NOCACHE mode, use buf_ptr to store the file offset of the data and skip the file
if (item_flags & ESIF_SERVICE_CONFIG_NOCACHE) {
size_t offset = IOStream_GetOffset(vault);
IOStream_Seek(vault, value.data_len, SEEK_CUR);
value.buf_ptr = (void*)offset;
value.buf_len = 0; // data_len = original length
} else {
// Use static pointer for static data vaults (unless encrypted), otherwise make a dynamic copy
if (IOStream_GetType(vault) == StreamMemory && !(item_flags & ESIF_SERVICE_CONFIG_ENCRYPT)) {
value.buf_len = 0; // static
value.buf_ptr = IOStream_GetMemoryBuffer(vault) + IOStream_GetOffset(vault);
IOStream_Seek(vault, value.data_len, SEEK_CUR);
} else {
value.buf_len = value.data_len; // dynamic
value.buf_ptr = esif_ccb_malloc(value.buf_len);
if (!value.buf_ptr) {
EsifData_dtor(&key);
rc = ESIF_E_NO_MEMORY;
break;
}
IOStream_Read(vault, value.buf_ptr, value.data_len);
}
// Decrypt Encrypted Data?
if (item_flags & ESIF_SERVICE_CONFIG_ENCRYPT) {
UInt32 byte;
for (byte = 0; byte < value.data_len; byte++)
((UInt8*)(value.buf_ptr))[byte] = ~((UInt8*)(value.buf_ptr))[byte];
}
}
// Add value (including allocated buf_ptr) to cache
DataCache_SetValue(self->cache, (esif_string)key.buf_ptr, value, item_flags);
value.buf_ptr = 0;
item_flags = 0;
EsifData_dtor(&key);
EsifData_dtor(&value);
}
IOStream_Close(vault);
return rc;
}
