66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
#include <stdbool.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <linux/limits.h>
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#include <ftdi.h>
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#include <time.h>
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#define INFNOISE_VENDOR_ID 0x0403
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#define INFNOISE_PRODUCT_ID 0x6015
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// Required accuracy of estimated vs measured entropy in health monitor
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#define INM_ACCURACY 1.03
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// This is how many previous bits are used to predict the next bit from the INM
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#define PREDICTION_BITS 14u
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// This is the maximum time we allow to pass to perform the I/O operations, since long
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// delays can reduce entropy from the INM.
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#define MAX_MICROSEC_FOR_SAMPLES 5000u
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// This is the gain of each of the two op-amp stages in the INM
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#define DESIGN_K 1.84
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#define BITMODE_SYNCBB 0x4
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// This defines which pins on the FT240X are used
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#define COMP1 1u
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#define COMP2 4u
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#define SWEN1 2u
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#define SWEN2 0u
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// All data bus bits of the FT240X are outputs, except COMP1 and COMP2
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#define MASK (0xffu & ~(1u << COMP1) & ~(1u << COMP2))
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bool inmHealthCheckStart(uint8_t N, double K, bool debug);
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void inmHealthCheckStop(void);
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bool inmHealthCheckAddBit(bool evenBit, bool oddBit, bool even);
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bool inmHealthCheckOkToUseData(void);
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double inmHealthCheckEstimateK(void);
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double inmHealthCheckEstimateEntropyPerBit(void);
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uint32_t inmGetEntropyLevel(void);
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void inmClearEntropyLevel(void);
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bool inmEntropyOnTarget(uint32_t entropy, uint32_t bits);
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void inmWriteEntropyStart(uint32_t bufLen, bool debug);
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void inmWriteEntropyToPool(uint8_t *bytes, uint32_t length, uint32_t entropy);
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void inmWaitForPoolToHaveRoom(void);
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void inmDumpStats(void);
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extern double inmK, inmExpectedEntropyPerBit;
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bool initializeUSB(struct ftdi_context *ftdic, char **message, char *serial);
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void prepareOutputBuffer();
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struct timespec;
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double diffTime(struct timespec *start, struct timespec *end);
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uint32_t extractBytes(uint8_t *bytes, uint8_t *inBuf, char **message, bool *errorFlag);
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bool outputBytes(uint8_t *bytes, uint32_t length, uint32_t entropy, bool writeDevRandom, char **message);
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uint32_t processBytes(uint8_t *bytes, uint8_t *result, uint32_t entropy, bool raw,
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bool writeDevRandom, uint32_t outputMultiplier, bool noOutput, char **message, bool *errorFlag);
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uint32_t readData_private(struct ftdi_context *ftdic, uint8_t *result, char **message, bool *errorFlag, bool noOutput, bool raw, uint32_t outputMultiplier, bool devRandom);
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