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  • Committer: Teddy Hogeborn
  • Date: 2024-11-24 00:44:25 UTC
  • mto: This revision was merged to the branch mainline in revision 412.
  • Revision ID: teddy@recompile.se-20241124004425-6k3y0ir1ksyjq3c4
mandos-keygen: Show warning about old OpenSSH versions

When generating a config file snippet on the Mandos client system
using mandos-keygen, and the default ssh-keyscan checker is used, and
if the OpenSSH version is 9.8 or later, the "checker" command
generated for the config file on the Mandos server will include the
"-q" option for ssh-keyscan.  This option did not exist on ssh-keyscan
from OpenSSH older than version 9.8.  Therefore, if the Mandos
*server* is running an older version of OpenSSH, where ssh-keyscan
does not support the "-q" option, this option must be removed from the
generated "checker" setting.  Since we cannot know if this is the case
when running mandos-keygen on the Mandos client system, we print this
information as a comment above the generated "checker" setting.

* mandos-keygen: Show warning if the new "-q" options was used with
  ssh-keyscan in the generated "checker" setting.

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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, 2021-2022 Teddy Hogeborn
 
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 * Copyright © 2008-2019, 2021-2022 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,
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                                   ssize_t, open() */
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#include <stdlib.h>             /* EXIT_SUCCESS, EXIT_FAILURE,
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                                   getenv(), free() */
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#include <dirent.h>             /* scandir(), alphasort() */
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#include <stdio.h>              /* fprintf(), stderr, getline(),
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                                   stdin, feof(), fputc(), vfprintf(),
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                                   vasprintf() */
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#include <errno.h>              /* errno, EBADF, ENOTTY, EINVAL,
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                                   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() */
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#include <sys/stat.h>           /* struct stat, lstat(), open() */
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#include <string.h>             /* strlen, rindex, memcmp, strerror()
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                                 */
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#include <argp.h>               /* struct argp_option, struct
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                                   argp_state, struct argp,
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                                   argp_parse(), error_t,
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                                   ARGP_KEY_ARG, ARGP_KEY_END,
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                                   ARGP_ERR_UNKNOWN */
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#include <sysexits.h>           /* EX_SOFTWARE, EX_OSERR,
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                                   EX_UNAVAILABLE, EX_IOERR, EX_OK */
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#include <fcntl.h>              /* open() */
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#include <stdarg.h>             /* va_list, va_start(), ... */
 
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#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;