a98408c95e
Many init systems do their own backgrounding so use long timeout unconditionally. Change suggested by Manuel Domke.
63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
#include <stdbool.h>
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#include <stdint.h>
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#include <sys/types.h>
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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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// The FT240X has a 512 byte buffer. Must be multiple of 64
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// We also write this in one go to the Keccak sponge, which is at most 1600 bits
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#define BUFLEN 512u
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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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// Structure for parsed command line options
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struct opt_struct {
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uint32_t outputMultiplier; // We output all the entropy when outputMultiplier == 0
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bool daemon; // Run as daemon?
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bool debug; // Print debugging info?
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bool devRandom; // Feed /dev/random?
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bool noOutput; // Supress output?
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bool listDevices; // List possible USB-devices?
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bool raw; // No whitening?
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char *pidFileName; // Name of optional PID-file
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char *serial; // Name of selected device
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};
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bool inmHealthCheckStart(uint8_t N, double K, struct opt_struct *opts);
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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, struct opt_struct *opts);
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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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void startDaemon(struct opt_struct *opts);
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bool isSuperUser(void);
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extern double inmK, inmExpectedEntropyPerBit;
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