76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <sys/types.h>
|
|
|
|
#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__APPLE__) || defined(__FreeBSD__)
|
|
#include <limits.h>
|
|
#else
|
|
#include <linux/limits.h>
|
|
#endif
|
|
|
|
#include <ftdi.h>
|
|
#include <time.h>
|
|
|
|
// The FT240X has a 512 byte buffer. Must be multiple of 64
|
|
// We also write this in one go to the Keccak sponge, which is at most 1600 bits
|
|
#define BUFLEN 512u
|
|
|
|
struct infnoise_context {
|
|
struct ftdi_context ftdic;
|
|
uint32_t entropyThisTime;
|
|
char *message;
|
|
bool errorFlag;
|
|
//uint8_t keccakState[KeccakPermutationSizeInBytes];
|
|
};
|
|
|
|
struct infnoise_devlist_node {
|
|
uint8_t id;
|
|
char manufacturer[128];
|
|
char description[129];
|
|
char serial[128];
|
|
struct infnoise_devlist_node *next;
|
|
};
|
|
|
|
typedef struct infnoise_devlist_node *devlist_node;
|
|
|
|
/*
|
|
* returns a struct of infnoise_devlist_node listing all connected FTDI FT240 devices by its USB descriptors,
|
|
*
|
|
* parameters:
|
|
* - message: pointer for error message
|
|
*
|
|
* returns: NULL when none found or infnoise_devlist_node
|
|
*/
|
|
devlist_node listUSBDevices(char **message);
|
|
|
|
|
|
/*
|
|
* initialize the Infinite Noise TRNG - must be called once before readData() works.
|
|
*
|
|
* parameters:
|
|
* - context: pointer to infnoise_context struct
|
|
* - serial: optional serial number of the device (NULL)
|
|
* - keccak: initialize Keccak sponge (required to use readData with raw=false)
|
|
* - debug: debug flag
|
|
* returns: boolean success indicator (0=success)
|
|
*/
|
|
bool initInfnoise(struct infnoise_context *context, char *serial, bool keccak, bool debug);
|
|
|
|
/*
|
|
* Reads some bytes from the TRNG and stores them in the "result" byte array.
|
|
* The array has to be of sufficient size. Please refer to the example programs.
|
|
*
|
|
* After each read operation, the infnoise_context's errorFlag must be checked,
|
|
* and the data from this call has to be discarded!
|
|
* Detailed error messages can be found in context->message.
|
|
*
|
|
* parameters:
|
|
* - context: infnoise_context struct with device pointer and state variables
|
|
* - result: pointer to byte array to store the result
|
|
* - raw: boolean flag for raw or whitened output
|
|
* - outputMultiplier: only used for whitened output
|
|
*
|
|
* returns: number of bytes written to the array
|
|
*/
|
|
uint32_t readData(struct infnoise_context *context, uint8_t *result, bool raw, uint32_t outputMultiplier);
|