/mandos/release

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Viewing changes to plugins.d/mandos-client.c

  • Committer: Teddy Hogeborn
  • Date: 2014-07-25 22:44:20 UTC
  • mto: (237.7.272 trunk)
  • mto: This revision was merged to the branch mainline in revision 321.
  • Revision ID: teddy@recompile.se-20140725224420-4a5ct2ptt0hsc92z
Require Python 2.7.

This is in preparation for the eventual move to Python 3, which will
happen as soon as all Python modules required by Mandos are available.
The mandos-ctl and mandos-monitor programs are already portable
between Python 2.6 and Python 3 without changes; this change will
bring the requirement up to Python 2.7.

* INSTALL (Prerequisites/Libraries/Mandos Server): Document
                                                   requirement of
                                                   Python 2.7; remove
                                                   Python-argparse
                                                   which is in the
                                                   Python 2.7 standard
                                                   library.
* debian/control (Source: mandos/Build-Depends-Indep): Depend on
                                                       exactly the
                                                       python2.7
                                                       package and all
                                                       the Python 2.7
                                                       versions of the
                                                       python modules.
  (Package: mandos/Depends): - '' - but still depend on python (<=2.7)
                            and the generic versions of the Python
                            modules; this is for mandos-ctl and
                            mandos-monitor, both of which are
                            compatible with Python 3, and use
                            #!/usr/bin/python.
* mandos: Use #!/usr/bin/python2.7 instead of #!/usr/bin/python.

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Lines of Context:
plugins.d/mandos-client.c
493
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  return plaintext_length;
494
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}
495
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496
 
__attribute__((warn_unused_result, const))
497
 
static const char *safe_string(const char *str){
498
 
  if(str == NULL)
499
 
    return "(unknown)";
500
 
  return str;
501
 
}
502
 
 
503
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__attribute__((warn_unused_result))
504
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static const char *safer_gnutls_strerror(int value){
505
498
  const char *ret = gnutls_strerror(value);
506
 
  return safe_string(ret);
 
499
  if(ret == NULL)
 
500
    ret = "(unknown)";
 
501
  return ret;
507
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}
508
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509
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/* GnuTLS log function callback */
518
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                              const char *seckeyfilename,
519
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                              mandos_context *mc){
520
515
  int ret;
521
 
  unsigned int uret;
522
516
  
523
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  if(debug){
524
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    fprintf_plus(stderr, "Initializing GnuTLS\n");
575
569
                 safer_gnutls_strerror(ret));
576
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    goto globalfail;
577
571
  }
578
 
  if(mc->dh_bits == 0){
579
 
    /* Find out the optimal number of DH bits */
580
 
    /* Try to read the private key file */
581
 
    gnutls_datum_t buffer = { .data = NULL, .size = 0 };
582
 
    {
583
 
      int secfile = open(seckeyfilename, O_RDONLY);
584
 
      size_t buffer_capacity = 0;
585
 
      while(true){
586
 
        buffer_capacity = incbuffer((char **)&buffer.data,
587
 
                                    (size_t)buffer.size,
588
 
                                    (size_t)buffer_capacity);
589
 
        if(buffer_capacity == 0){
590
 
          perror_plus("incbuffer");
591
 
          free(buffer.data);
592
 
          buffer.data = NULL;
593
 
          break;
594
 
        }
595
 
        ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
596
 
                                  BUFFER_SIZE);
597
 
        /* EOF */
598
 
        if(bytes_read == 0){
599
 
          break;
600
 
        }
601
 
        /* check bytes_read for failure */
602
 
        if(bytes_read < 0){
603
 
          perror_plus("read");
604
 
          free(buffer.data);
605
 
          buffer.data = NULL;
606
 
          break;
607
 
        }
608
 
        buffer.size += (unsigned int)bytes_read;
609
 
      }
610
 
      close(secfile);
611
 
    }
612
 
    /* If successful, use buffer to parse private key */
613
 
    gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
614
 
    if(buffer.data != NULL){
615
 
      {
616
 
        gnutls_openpgp_privkey_t privkey = NULL;
617
 
        ret = gnutls_openpgp_privkey_init(&privkey);
618
 
        if(ret != GNUTLS_E_SUCCESS){
619
 
          fprintf_plus(stderr, "Error initializing OpenPGP key"
620
 
                       " structure: %s", safer_gnutls_strerror(ret));
621
 
          free(buffer.data);
622
 
          buffer.data = NULL;
623
 
        } else {
624
 
          ret = gnutls_openpgp_privkey_import(privkey, &buffer,
625
 
                                            GNUTLS_OPENPGP_FMT_BASE64,
626
 
                                              "", 0);
627
 
          if(ret != GNUTLS_E_SUCCESS){
628
 
            fprintf_plus(stderr, "Error importing OpenPGP key : %s",
629
 
                         safer_gnutls_strerror(ret));
630
 
            privkey = NULL;
631
 
          }
632
 
          free(buffer.data);
633
 
          buffer.data = NULL;
634
 
          if(privkey != NULL){
635
 
            /* Use private key to suggest an appropriate sec_param */
636
 
            sec_param = gnutls_openpgp_privkey_sec_param(privkey);
637
 
            gnutls_openpgp_privkey_deinit(privkey);
638
 
            if(debug){
639
 
              fprintf_plus(stderr, "This OpenPGP key implies using a"
640
 
                           " GnuTLS security parameter \"%s\".\n",
641
 
                           safe_string(gnutls_sec_param_get_name
642
 
                                       (sec_param)));
643
 
            }
644
 
          }
645
 
        }
646
 
      }
647
 
      if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
 
        /* Err on the side of caution */
649
 
        sec_param = GNUTLS_SEC_PARAM_ULTRA;
650
 
        if(debug){
651
 
          fprintf_plus(stderr, "Falling back to security parameter"
652
 
                       " \"%s\"\n",
653
 
                       safe_string(gnutls_sec_param_get_name
654
 
                                   (sec_param)));
655
 
        }
656
 
      }
657
 
    }
658
 
    uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
659
 
    if(uret != 0){
660
 
      mc->dh_bits = uret;
661
 
      if(debug){
662
 
        fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
663
 
                     " implies %u DH bits; using that.\n",
664
 
                     safe_string(gnutls_sec_param_get_name
665
 
                                 (sec_param)),
666
 
                     mc->dh_bits);
667
 
      }
668
 
    } else {
669
 
      fprintf_plus(stderr, "Failed to get implied number of DH"
670
 
                   " bits for security parameter \"%s\"): %s\n",
671
 
                   safe_string(gnutls_sec_param_get_name(sec_param)),
672
 
                   safer_gnutls_strerror(ret));
673
 
      goto globalfail;
674
 
    }
675
 
  } else if(debug){
676
 
    fprintf_plus(stderr, "DH bits explicitly set to %u\n",
677
 
                 mc->dh_bits);
678
 
  }
679
572
  ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
680
573
  if(ret != GNUTLS_E_SUCCESS){
681
 
    fprintf_plus(stderr, "Error in GnuTLS prime generation (%u bits):"
682
 
                 " %s\n", mc->dh_bits, safer_gnutls_strerror(ret));
 
574
    fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
 
575
                 safer_gnutls_strerror(ret));
683
576
    goto globalfail;
684
577
  }
685
578
  
1757
1650
        _exit(EXIT_FAILURE);
1758
1651
      }
1759
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    } else {
1760
 
      if(hook_pid == -1){
1761
 
        perror_plus("fork");
1762
 
        free(direntry);
1763
 
        continue;
1764
 
      }
1765
1653
      int status;
1766
1654
      if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1767
1655
        perror_plus("waitpid");
2007
1895
}
2008
1896
 
2009
1897
int main(int argc, char *argv[]){
2010
 
  mandos_context mc = { .server = NULL, .dh_bits = 0,
 
1898
  mandos_context mc = { .server = NULL, .dh_bits = 1024,
2011
1899
                        .priority = "SECURE256:!CTYPE-X.509:"
2012
 
                        "+CTYPE-OPENPGP:!RSA", .current_server = NULL,
 
1900
                        "+CTYPE-OPENPGP", .current_server = NULL,
2013
1901
                        .interfaces = NULL, .interfaces_size = 0 };
2014
1902
  AvahiSServiceBrowser *sb = NULL;
2015
1903
  error_t ret_errno;