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  • Committer: Teddy Hogeborn
  • Date: 2021-03-21 20:46:40 UTC
  • mto: This revision was merged to the branch mainline in revision 406.
  • Revision ID: teddy@recompile.se-20210321204640-lpsyen8jr9lw1jma
Some cleanup of GnuTLS interface

Rename opaque internal GnuTLS structures named *_int to also start
with underscore (_), as is the custom in Python programs.

Decode byte strings from UTF-8 where needed.  (Fixing, among other
things, all "DEBUG: GnuTLS" lines having a "b'" prefix in Python 3.)

Simplify calling C functions by:
1. Using the "_as_parameter_" attribute to store the ctypes object.
2. Creating and using helper classes to automatically create pointers
   or cast typed pointers to pointers to void.
3. Providing the "from_param()" method on relevant classes.

Remove "restype" attribute on C functions where "errcheck" attribute
is already set.

* mandos (gnutls.session_int): Rename to start with "_".
  (gnutls.openpgp_crt_int): - '' -
  (gnutls.Error.__init__): Decode byte string from gnutls.strerror().
  (gnutls.PointerTo): New helper class.
  (gnutls.CastToVoidPointer): - '' -
  (gnutls.With_from_param): - '' -
  (gnutls.Credentials): Inherit from "With_from_param" and store the
  ctypes object in the "_as_parameter_" attribute instead of
  "_c_object".
  (gnutls._error_code): Use "gnutls.E_SUCCESS" instead of the unadorned
  numerical constant "0".
  (gnutls._retry_on_error): - '' -
  (gnutls.priority_set_direct.argtypes): Use "ClientSession" instead
  of "session_t", and change all callers to match.
  (gnutls.init.argtypes): Use "PointerTo(ClientSession)" instead of
  "ctypes.POINTER(session_t)", and change all callers to match.
  (gnutls.set_default_priority.argtypes): Use "ClientSession" instead
  of "session_t", and change all callers to match.
  (gnutls.record_send.argtypes): - '' -
  (gnutls.certificate_allocate_credentials.argtypes): Use
  "PointerTo(Credentials)" instead of
  "ctypes.POINTER(certificate_credentials_t)", and change all callers
  to match.
  (gnutls.certificate_free_credentials.argtypes): Use "Credentials"
  instead of "certificate_credentials_t", and change all callers to
  match.
  (gnutls.handshake_set_private_extensions.argtypes): Use
  "ClientSession" instead of "session_t", and change all callers to
  match.
  (gnutls.credentials_set.argtypes): Use
  "CastToVoidPointer(Credentials)" instead of "ctypes.c_void_p", and
  change all callers to match.
  (gnutls.certificate_type_get.argtypes): Use "ClientSession" instead
  of "session_t", and change all callers to match.
  (gnutls.certificate_get_peers.argtypes): - '' -
  (gnutls.deinit.argtypes): - '' -
  (gnutls.handshake.argtypes): - '' -
  (gnutls.handshake.restype): Change from "_error_code" to
  "ctypes.c_int".
  (gnutls.transport_set_ptr.argtypes): Use "ClientSession" instead of
  "session_t", and change all callers to match.
  (gnutls.bye.argtypes): - '' -
  (gnutls.bye.restype): Change from "_error_code" to "ctypes.c_int".
  (gnutls.certificate_type_get2.argtypes): Use "ClientSession" instead
  of "session_t", and change all callers to match.
  (ClientHandler.handle): Decode "key_id" bytes to string before
  logging it in the debug log.
  (main.debug_gnutls): Decode GnuTLS log message from bytes to string
  before logging it in the debug log.

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Lines of Context:
plugins.d/password-prompt.c
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/*
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 * Password-prompt - Read a password from the terminal and print it
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 * 
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 * Copyright © 2008-2019 Teddy Hogeborn
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 * Copyright © 2008-2019 Björn Påhlsson
 
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 * Copyright © 2008-2019, 2021 Teddy Hogeborn
 
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 * Copyright © 2008-2019, 2021 Björn Påhlsson
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 * 
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 * This file is part of Mandos.
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 * 
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 * Contact the authors at <mandos@recompile.se>.
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 */
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#define _GNU_SOURCE             /* getline(), asprintf() */
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#include <termios.h>            /* struct termios, tcsetattr(),
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                                   TCSAFLUSH, tcgetattr(), ECHO */
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#include <unistd.h>             /* access(), struct termios,
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                                   tcsetattr(), STDIN_FILENO,
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                                   TCSAFLUSH, tcgetattr(), ECHO,
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                                   readlink() */
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#include <signal.h>             /* sig_atomic_t, raise(), struct
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                                   sigaction, sigemptyset(),
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                                   sigaction(), sigaddset(), SIGINT,
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                                   SIGQUIT, SIGHUP, SIGTERM,
 
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#define _GNU_SOURCE             /* vasprintf(),
 
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                                   program_invocation_short_name,
 
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                                   asprintf(), getline() */
 
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#include <sys/types.h>          /* sig_atomic_t, pid_t */
 
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#include <stdbool.h>            /* bool, false, true */
 
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#include <argp.h>               /* argp_program_version,
 
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                                   argp_program_bug_address,
 
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                                   struct argp_option,
 
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                                   struct argp_state, argp_state_help,
 
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                                   ARGP_HELP_STD_HELP,
 
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                                   ARGP_HELP_EXIT_ERR,
 
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                                   ARGP_HELP_EXIT_OK, ARGP_HELP_USAGE,
 
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                                   argp_err_exit_status,
 
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                                   ARGP_ERR_UNKNOWN, argp_parse(),
 
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                                   ARGP_IN_ORDER, ARGP_NO_HELP */
 
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#include <stdarg.h>             /* va_list, va_start(), vfprintf() */
 
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#include <stdio.h>              /* vasprintf(), fprintf(), stderr,
 
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                                   vfprintf(), asprintf(), getline(),
 
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                                   stdin, feof(), clearerr(),
 
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                                   fputc() */
 
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#include <errno.h>              /* program_invocation_short_name,
 
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                                   errno, ENOENT, error_t, ENOMEM,
 
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                                   EINVAL, EBADF, ENOTTY, EFAULT,
 
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                                   EFBIG, EIO, ENOSPC, EINTR */
 
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#include <string.h>             /* strerror(), strrchr(), strcmp() */
 
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#include <error.h>              /* error() */
 
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#include <stdlib.h>             /* free(), realloc(), EXIT_SUCCESS,
 
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                                   EXIT_FAILURE, getenv() */
 
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#include <unistd.h>             /* access(), R_OK, ssize_t, close(),
 
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                                   read(), STDIN_FILENO, write(),
 
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                                   STDOUT_FILENO */
 
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#include <dirent.h>             /* struct dirent, scandir(),
 
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                                   alphasort() */
 
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#include <inttypes.h>           /* uintmax_t, strtoumax() */
 
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#include <iso646.h>             /* or, and, not */
 
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#include <fcntl.h>              /* open(), O_RDONLY */
 
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#include <stddef.h>             /* NULL, size_t */
 
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#include <termios.h>            /* struct termios, tcgetattr(),
 
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                                   tcflag_t, ECHO, tcsetattr(),
 
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                                   TCSAFLUSH */
 
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#include <signal.h>             /* struct sigaction, sigemptyset(),
 
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                                   sigaddset(), SIGINT, SIGHUP,
 
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                                   SIGTERM, SIG_IGN, SIG_DFL,
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                                   raise() */
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#include <stddef.h>             /* NULL, size_t, ssize_t */
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#include <sys/types.h>          /* ssize_t, struct dirent, pid_t,
41
 
                                   ssize_t, open() */
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#include <stdlib.h>             /* EXIT_SUCCESS, EXIT_FAILURE,
43
 
                                   getenv(), free() */
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#include <dirent.h>             /* scandir(), alphasort() */
45
 
#include <stdio.h>              /* fprintf(), stderr, getline(),
46
 
                                   stdin, feof(), fputc(), vfprintf(),
47
 
                                   vasprintf() */
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#include <errno.h>              /* errno, EBADF, ENOTTY, EINVAL,
49
 
                                   EFAULT, EFBIG, EIO, ENOSPC, EINTR
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                                */
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#include <error.h>              /* error() */
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#include <iso646.h>             /* or, not */
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#include <stdbool.h>            /* bool, false, true */
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#include <inttypes.h>           /* strtoumax() */
55
 
#include <sys/stat.h>           /* struct stat, lstat(), open() */
56
 
#include <string.h>             /* strlen, rindex, memcmp, strerror()
57
 
                                 */
58
 
#include <argp.h>               /* struct argp_option, struct
59
 
                                   argp_state, struct argp,
60
 
                                   argp_parse(), error_t,
61
 
                                   ARGP_KEY_ARG, ARGP_KEY_END,
62
 
                                   ARGP_ERR_UNKNOWN */
63
 
#include <sysexits.h>           /* EX_SOFTWARE, EX_OSERR,
64
 
                                   EX_UNAVAILABLE, EX_IOERR, EX_OK */
65
 
#include <fcntl.h>              /* open() */
66
 
#include <stdarg.h>             /* va_list, va_start(), ... */
 
70
#include <sysexits.h>           /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
 
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                                   EX_IOERR, EX_OSFILE, EX_OK */
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volatile sig_atomic_t quit_now = 0;
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int signal_received;