crypto_mpi.c File Reference

Helper functions for libgcrypt MPIs. More...

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

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Macros
#define	LOG(kind, ...)   GNUNET_log_from (kind, "util-crypto-mpi", __VA_ARGS__)
#define	LOG_GCRY(level, cmd, rc)
	Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the message given by gcry_strerror(rc). More...

Functions
static void	adjust (void *buf, size_t size, size_t target)
	If target != size, move target bytes to the end of the size-sized buffer and zero out the first target - size bytes. More...
void	GNUNET_CRYPTO_mpi_print_unsigned (void *buf, size_t size, gcry_mpi_t val)
	Output the given MPI value to the given buffer in network byte order. More...
void	GNUNET_CRYPTO_mpi_scan_unsigned (gcry_mpi_t *result, const void *data, size_t size)
	Convert data buffer into MPI value. More...

Detailed Description

Helper functions for libgcrypt MPIs.

Author

Christian Grothoff

Florian Dold

Definition in file crypto_mpi.c.

Macro Definition Documentation

LOG

#define LOG	(		kind,
			...
	)		GNUNET_log_from (kind, "util-crypto-mpi", __VA_ARGS__)

Definition at line 33 of file crypto_mpi.c.

LOG_GCRY

#define LOG_GCRY	(		level,
			cmd,
			rc
	)

Value:

                                             do { LOG (level, _ ( \
                                             "`%s' failed at %s:%d with error: %s\n"), \
                                           cmd, __FILE__, __LINE__, \
                                           gcry_strerror (rc)); } while (0)

Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the message given by gcry_strerror(rc).

Definition at line 40 of file crypto_mpi.c.

Function Documentation

adjust()

static void adjust ( void *  buf, size_t  size, size_t  target  )

static

If target != size, move target bytes to the end of the size-sized buffer and zero out the first target - size bytes.

Parameters

buf	original buffer
size	number of bytes in buf
target	target size of the buffer

Definition at line 55 of file crypto_mpi.c.

{
  char *p = buf;
 
  if (size < target)
  {
    memmove (&p[target - size], buf, size);
    memset (buf, 0, target - size);
  }
}

References p, and size.

Referenced by GNUNET_CRYPTO_mpi_print_unsigned().

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