helper function for easy EdDSA key setup More...

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

Include dependency graph for crypto_ecc_setup.c:

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

#define	LOG_STRERROR(kind, syscall) GNUNET_log_from_strerror (kind, "util-crypto-ecc", syscall)

#define	LOG_STRERROR_FILE(kind, syscall, filename) GNUNET_log_from_strerror_file (kind, "util-crypto-ecc", syscall, filename)

#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 enum GNUNET_GenericReturnValue	read_from_file (const char filename, void buf, size_t buf_size)
	Read file to buf. More...

enum GNUNET_GenericReturnValue	GNUNET_CRYPTO_eddsa_key_from_file (const char filename, int do_create, struct GNUNET_CRYPTO_EddsaPrivateKey pkey)
	Create a new private key by reading it from a file. More...

enum GNUNET_GenericReturnValue	GNUNET_CRYPTO_ecdsa_key_from_file (const char filename, int do_create, struct GNUNET_CRYPTO_EcdsaPrivateKey pkey)
	Create a new private key by reading it from a file. More...

struct GNUNET_CRYPTO_EddsaPrivateKey *	GNUNET_CRYPTO_eddsa_key_create_from_configuration (const struct GNUNET_CONFIGURATION_Handle *cfg)
	Create a new private key by reading our peer's key from the file specified in the configuration. More...

enum GNUNET_GenericReturnValue	GNUNET_CRYPTO_get_peer_identity (const struct GNUNET_CONFIGURATION_Handle cfg, struct GNUNET_PeerIdentity dst)
	Retrieve the identity of the host's peer. More...

enum GNUNET_GenericReturnValue	GNUNET_CRYPTO_sign_by_peer_identity (const struct GNUNET_CONFIGURATION_Handle cfg, const struct GNUNET_CRYPTO_EccSignaturePurpose purpose, struct GNUNET_CRYPTO_EddsaSignature *sig)
	Sign a given block with a specific purpose using the host's peer identity. More...

enum GNUNET_GenericReturnValue	GNUNET_CRYPTO_verify_peer_identity (uint32_t purpose, const struct GNUNET_CRYPTO_EccSignaturePurpose validate, const struct GNUNET_CRYPTO_EddsaSignature sig, const struct GNUNET_PeerIdentity *identity)
	Verify a given signature with a peer's identity. More...

Detailed Description

helper function for easy EdDSA key setup

Author: Christian Grothoff

Definition in file crypto_ecc_setup.c.

Macro Definition Documentation

◆ LOG

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

Definition at line 31 of file crypto_ecc_setup.c.

◆ LOG_STRERROR

#define LOG_STRERROR	(	kind,
		syscall
	)	GNUNET_log_from_strerror (kind, "util-crypto-ecc", syscall)

Definition at line 33 of file crypto_ecc_setup.c.

◆ LOG_STRERROR_FILE

#define LOG_STRERROR_FILE	(	kind,
		syscall,
		filename
	)	GNUNET_log_from_strerror_file (kind, "util-crypto-ecc", syscall, filename)

Definition at line 36 of file crypto_ecc_setup.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 44 of file crypto_ecc_setup.c.

Function Documentation

◆ read_from_file()

static enum GNUNET_GenericReturnValue read_from_file	(	const char *	filename,
		void *	buf,
		size_t	buf_size
	)

static

Read file to buf.

Fails if the file does not exist or does not have precisely buf_size bytes.

Parameters

	filename	file to read
[out]	buf	where to write the file contents
	buf_size	number of bytes in buf

Returns: GNUNET_OK on success

Definition at line 66 of file crypto_ecc_setup.c.

{
  int fd;
  struct stat sb;
 
  fd = open (filename,
             O_RDONLY);
  if (-1 == fd)
  {
    memset (buf,
            0,
            buf_size);
    return GNUNET_SYSERR;
  }
  if (0 != fstat (fd,
                  &sb))
  {
    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
                              "stat",
                              filename);
    GNUNET_assert (0 == close (fd));
    memset (buf,
            0,
            buf_size);
    return GNUNET_SYSERR;
  }
  if (sb.st_size != buf_size)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                "File `%s' has wrong size (%llu), expected %llu bytes\n",
                filename,
                (unsigned long long) sb.st_size,
                (unsigned long long) buf_size);
    GNUNET_assert (0 == close (fd));
    memset (buf,
            0,
            buf_size);
    return GNUNET_SYSERR;
  }
  if (buf_size !=
      read (fd,
            buf,
            buf_size))
  {
    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
                              "read",
                              filename);
    GNUNET_assert (0 == close (fd));
    memset (buf,
            0,
            buf_size);
    return GNUNET_SYSERR;
  }
  GNUNET_assert (0 == close (fd));
  return GNUNET_OK;
}

References filename, GNUNET_assert, GNUNET_ERROR_TYPE_WARNING, GNUNET_log, GNUNET_log_strerror_file, GNUNET_OK, and GNUNET_SYSERR.

Referenced by GNUNET_CRYPTO_ecdsa_key_from_file(), and GNUNET_CRYPTO_eddsa_key_from_file().

Here is the caller graph for this function:

Macros

Functions