tool to manipulate SCRYPT proofs of work. More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include <gcrypt.h>

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Macros
#define	ROUND_SIZE 10

Functions
static void	shutdown_task (void *cls)
	Write our current proof to disk. More...

static void	find_proof (void *cls)
	Find our proof of work. More...

static void	run (void cls, char const args, const char cfgfile, const struct GNUNET_CONFIGURATION_Handle *config)
	Main function that will be run by the scheduler. More...

int	main (int argc, char const argv)
	Program to manipulate ECC key files. More...

Variables
static struct GNUNET_CRYPTO_PowSalt	salt = { "gnunet-nse-proof" }
	Salt for PoW calculations. More...

static unsigned long long	nse_work_required
	Amount of work required (W-bit collisions) for NSE proofs, in collision-bits. More...

static struct GNUNET_TIME_Relative	proof_find_delay
	Interval between proof find runs. More...

static struct GNUNET_CRYPTO_EddsaPublicKey	pub

static uint64_t	proof

static struct GNUNET_SCHEDULER_Task *	proof_task

static const struct GNUNET_CONFIGURATION_Handle *	cfg

static char *	pkfn

static char *	pwfn

Detailed Description

tool to manipulate SCRYPT proofs of work.

Author: Bart Polot

Definition in file gnunet-scrypt.c.

Macro Definition Documentation

◆ ROUND_SIZE

#define ROUND_SIZE 10

Function Documentation

◆ shutdown_task()

static void shutdown_task ( void * cls )

static

Write our current proof to disk.

Parameters

cls closure

Definition at line 66 of file gnunet-scrypt.c.

{
  (void) cls;
  if (GNUNET_OK !=
      GNUNET_DISK_fn_write (pwfn,
                            &proof,
                            sizeof(proof),
                            GNUNET_DISK_PERM_USER_READ
                            | GNUNET_DISK_PERM_USER_WRITE))
    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
                              "write",
                              pwfn);
}

References GNUNET_DISK_fn_write(), GNUNET_DISK_PERM_USER_READ, GNUNET_DISK_PERM_USER_WRITE, GNUNET_ERROR_TYPE_WARNING, GNUNET_log_strerror_file, GNUNET_OK, proof, and pwfn.

Referenced by find_proof(), and run().

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◆ find_proof()

static void find_proof ( void * cls )

static

Find our proof of work.

Parameters

cls	closure (unused)

Definition at line 87 of file gnunet-scrypt.c.

{
#define ROUND_SIZE 10
  uint64_t counter;
  char buf[sizeof(struct GNUNET_CRYPTO_EddsaPublicKey)
           + sizeof(uint64_t)] GNUNET_ALIGN;
  struct GNUNET_HashCode result;
  unsigned int i;
  struct GNUNET_TIME_Absolute timestamp;
  struct GNUNET_TIME_Relative elapsed;
 
  (void) cls;
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Got Proof of Work %llu\n",
              (unsigned long long) proof);
  proof_task = NULL;
  GNUNET_memcpy (&buf[sizeof(uint64_t)],
                 &pub,
                 sizeof(struct GNUNET_CRYPTO_EddsaPublicKey));
  i = 0;
  counter = proof;
  timestamp = GNUNET_TIME_absolute_get ();
  while ((counter != UINT64_MAX) && (i < ROUND_SIZE))
  {
    GNUNET_memcpy (buf, &counter, sizeof(uint64_t));
    GNUNET_CRYPTO_pow_hash (&salt,
                            buf,
                            sizeof(buf),
                            &result);
    if (nse_work_required <=
        GNUNET_CRYPTO_hash_count_leading_zeros (&result))
    {
      proof = counter;
      fprintf (stdout,
               "Proof of work found: %llu!\n",
               (unsigned long long) proof);
      GNUNET_SCHEDULER_shutdown ();
      return;
    }
    counter++;
    i++;
  }
  elapsed = GNUNET_TIME_absolute_get_duration (timestamp);
  elapsed = GNUNET_TIME_relative_divide (elapsed, ROUND_SIZE);
  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
              "Current: %llu [%s/proof]\n",
              (unsigned long long) counter,
              GNUNET_STRINGS_relative_time_to_string (elapsed, 0));
  if (proof / (100 * ROUND_SIZE) < counter / (100 * ROUND_SIZE))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Testing proofs currently at %llu\n",
                (unsigned long long) counter);
    /* remember progress every 100 rounds */
    proof = counter;
    shutdown_task (NULL);
  }
  else
  {
    proof = counter;
  }
  proof_task =
    GNUNET_SCHEDULER_add_delayed_with_priority (proof_find_delay,
                                                GNUNET_SCHEDULER_PRIORITY_IDLE,
                                                &find_proof,
                                                NULL);
}

References find_proof(), GNUNET_ALIGN, GNUNET_CRYPTO_hash_count_leading_zeros(), GNUNET_CRYPTO_pow_hash(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_INFO, GNUNET_log, GNUNET_memcpy, GNUNET_SCHEDULER_add_delayed_with_priority(), GNUNET_SCHEDULER_PRIORITY_IDLE, GNUNET_SCHEDULER_shutdown(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_TIME_absolute_get(), GNUNET_TIME_absolute_get_duration(), GNUNET_TIME_relative_divide(), nse_work_required, proof, proof_find_delay, proof_task, pub, result, ROUND_SIZE, salt, shutdown_task(), and timestamp().

Referenced by find_proof(), and run().

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◆ run()

static void run	(	void *	cls,
		char const	args,
		const char *	cfgfile,
		const struct GNUNET_CONFIGURATION_Handle *	config
	)

static

Main function that will be run by the scheduler.

Parameters

cls	closure
args	remaining command-line arguments
cfgfile	name of the configuration file used (for saving, can be NULL!)
cfg	configuration

Definition at line 165 of file gnunet-scrypt.c.

{
  struct GNUNET_CRYPTO_EddsaPrivateKey pk;
  char *pids;
 
  (void) cls;
  (void) args;
  (void) cfgfile;
  cfg = config;
  /* load proof of work */
  if (NULL == pwfn)
  {
    if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg,
                                                              "NSE",
                                                              "PROOFFILE",
                                                              &pwfn))
    {
      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, "NSE", "PROOFFILE");
      GNUNET_SCHEDULER_shutdown ();
      return;
    }
  }
  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Proof of Work file: %s\n", pwfn);
  if ((GNUNET_YES != GNUNET_DISK_file_test (pwfn)) ||
      (sizeof(proof) != GNUNET_DISK_fn_read (pwfn, &proof, sizeof(proof))))
    proof = 0;
 
  /* load private key */
  if (NULL == pkfn)
  {
    if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg,
                                                              "PEER",
                                                              "PRIVATE_KEY",
                                                              &pkfn))
    {
      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                                 "PEER",
                                 "PRIVATE_KEY");
      return;
    }
  }
  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Private Key file: %s\n", pkfn);
  if (GNUNET_SYSERR ==
      GNUNET_CRYPTO_eddsa_key_from_file (pkfn,
                                         GNUNET_YES,
                                         &pk))
  {
    fprintf (stderr, _ ("Loading hostkey from `%s' failed.\n"), pkfn);
    GNUNET_free (pkfn);
    return;
  }
  GNUNET_free (pkfn);
  GNUNET_CRYPTO_eddsa_key_get_public (&pk,
                                      &pub);
  pids = GNUNET_CRYPTO_eddsa_public_key_to_string (&pub);
  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Peer ID: %s\n", pids);
  GNUNET_free (pids);
 
  /* get target bit amount */
  if (0 == nse_work_required)
  {
    if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg,
                                                            "NSE",
                                                            "WORKBITS",
                                                            &nse_work_required))
    {
      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, "NSE", "WORKBITS");
      GNUNET_SCHEDULER_shutdown ();
      return;
    }
    if (nse_work_required >= sizeof(struct GNUNET_HashCode) * 8)
    {
      GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
                                 "NSE",
                                 "WORKBITS",
                                 _ ("Value is too large.\n"));
      GNUNET_SCHEDULER_shutdown ();
      return;
    }
    else if (0 == nse_work_required)
    {
      GNUNET_SCHEDULER_shutdown ();
      return;
    }
  }
  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Bits: %llu\n", nse_work_required);
 
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Delay between tries: %s\n",
              GNUNET_STRINGS_relative_time_to_string (proof_find_delay, 1));
  proof_task =
    GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_IDLE,
                                        &find_proof,
                                        NULL);
  GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
}

References _, consensus-simulation::args, cfg, config, find_proof(), GNUNET_CONFIGURATION_get_value_filename(), GNUNET_CONFIGURATION_get_value_number(), GNUNET_CRYPTO_eddsa_key_from_file(), GNUNET_CRYPTO_eddsa_key_get_public(), GNUNET_CRYPTO_eddsa_public_key_to_string(), GNUNET_DISK_file_test(), GNUNET_DISK_fn_read(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_free, GNUNET_log, GNUNET_log_config_invalid(), GNUNET_log_config_missing(), GNUNET_OK, GNUNET_SCHEDULER_add_shutdown(), GNUNET_SCHEDULER_add_with_priority(), GNUNET_SCHEDULER_PRIORITY_IDLE, GNUNET_SCHEDULER_shutdown(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_SYSERR, GNUNET_YES, nse_work_required, pk, pkfn, proof, proof_find_delay, proof_task, pub, pwfn, and shutdown_task().

Referenced by main().

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◆ main()

int main	(	int	argc,
		char const	argv
	)

Program to manipulate ECC key files.

Parameters

argc	number of arguments from the command line
argv	command line arguments

Returns: 0 ok, 1 on error

Definition at line 274 of file gnunet-scrypt.c.

{
  struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_option_ulong (
      'b',
      "bits",
      "BITS",
      gettext_noop ("number of bits to require for the proof of work"),
      &nse_work_required),
    GNUNET_GETOPT_option_filename (
      'k',
      "keyfile",
      "FILE",
      gettext_noop ("file with private key, otherwise default is used"),
      &pkfn),
    GNUNET_GETOPT_option_filename (
      'o',
      "outfile",
      "FILE",
      gettext_noop ("file with proof of work, otherwise default is used"),
      &pwfn),
    GNUNET_GETOPT_option_relative_time ('t',
                                        "timeout",
                                        "TIME",
                                        gettext_noop (
                                          "time to wait between calculations"),
                                        &proof_find_delay),
    GNUNET_GETOPT_OPTION_END
  };
  int ret;
 
  ret =
    (GNUNET_OK ==
     GNUNET_PROGRAM_run (GNUNET_OS_project_data_gnunet (),
                         argc,
                         argv,
                         "gnunet-scrypt [OPTIONS] prooffile",
                         gettext_noop ("Manipulate GNUnet proof of work files"),
                         options,
                         &run,
                         NULL))
    ? 0
    : 1;
  GNUNET_free (pwfn);
  return ret;
}