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Viewing changes to plugins.d/askpass-fifo.c

  • Committer: Teddy Hogeborn
  • Date: 2014-06-22 02:19:30 UTC
  • Revision ID: teddy@recompile.se-20140622021930-icl7h4cm97blhjml
mandos-keygen: Generate "checker" option to use SSH fingerprints.

To turn this off, use a new "--no-ssh" option to mandos-keygen.

* INSTALL (Mandos Server, Mandos Client): Document new suggested
                                          installation of SSH.
* Makefile (confdir/clients.conf): Use new "--no-ssh" option to
                                   "mandos-keygen".
* debian/control (mandos/Depends): Changed to "fping | ssh-client".
  (mandos-client/Recommends): New; set to "ssh".
* intro.xml (FREQUENTLY ASKED QUESTIONS): Rename and rewrite section
                                          called "Faking ping
                                          replies?" to address new
                                          default behavior.
* mandos-clients.conf.xml (OPTIONS/checker): Briefly discuss new
                                             behavior of
                                             mandos-keygen.
* mandos-keygen: Bug fix: Suppress failure output of "shred" to remove
                 "sec*", since no such files may exist.
 (password mode): Scan for SSH key fingerprints and output as new
                  "checker" and "ssh_fingerprint" options, unless new
                  "--no-ssh" option is given.
* mandos-keygen.xml (SYNOPSIS/--force): Bug fix: Document short form.
  (OPTIONS/--no-ssh): New.
  (SEE ALSO): Add reference "ssh-keyscan(1)".
* plugins.d/mandos-client.xml (SECURITY): Briefly mention the
                                          possibility of using SSH key
                                          fingerprints for checking.

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Lines of Context:
plugins.d/askpass-fifo.c
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 */
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#define _GNU_SOURCE             /* TEMP_FAILURE_RETRY() */
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#include <sys/types.h>          /* uid_t, gid_t, ssize_t */
 
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#include <sys/types.h>          /* ssize_t */
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#include <sys/stat.h>           /* mkfifo(), S_IRUSR, S_IWUSR */
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#include <iso646.h>             /* and */
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#include <errno.h>              /* errno, EACCES, ENOTDIR, ELOOP,
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#include <string.h>             /* strerror() */
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#include <stdarg.h>             /* va_list, va_start(), ... */
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uid_t uid = 65534;
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gid_t gid = 65534;
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/* Function to use when printing errors */
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__attribute__((format (gnu_printf, 3, 4)))
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  int ret = 0;
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  ssize_t sret;
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  uid = getuid();
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  gid = getgid();
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  /* Create FIFO */
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  const char passfifo[] = "/lib/cryptsetup/passfifo";
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  ret = mkfifo(passfifo, S_IRUSR | S_IWUSR);
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    }
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  }
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  /* Lower group privileges  */
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  if(setgid(gid) == -1){
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    error_plus(0, errno, "setgid");
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  }
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  /* Lower user privileges */
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  if(setuid(uid) == -1){
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    error_plus(0, errno, "setuid");
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  }
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  /* Read from FIFO */
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  char *buf = NULL;
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  size_t buf_len = 0;