path: root/g10/status.c

/* status.c - Status message and command-fd interface 
 * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003,
 *               2004, 2005, 2006 Free Software Foundation, Inc.
 *
 * This file is part of GnuPG.
 *
 * GnuPG is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * GnuPG is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <signal.h>

#include "gpg.h"
#include "util.h"
#include "status.h"
#include "ttyio.h"
#include "options.h"
#include "main.h"
#include "i18n.h"
#include "cipher.h" /* for progress functions */

#define CONTROL_D ('D' - 'A' + 1)



static FILE *statusfp;


static void
progress_cb (void *ctx, const char *what, int printchar,
             int current, int total)
{
  char buf[50];

  if ( printchar == '\n' && !strcmp (what, "primegen") )
    snprintf (buf, sizeof buf -1, "%.20s X 100 100", what );
  else
    snprintf (buf, sizeof buf -1, "%.20s %c %d %d",
              what, printchar=='\n'?'X':printchar, current, total );
  write_status_text (STATUS_PROGRESS, buf);
}

static const char *
get_status_string ( int no ) 
{
  const char *s;

  switch( no )
    {
    case STATUS_ENTER  : s = "ENTER"; break;
    case STATUS_LEAVE  : s = "LEAVE"; break;
    case STATUS_ABORT  : s = "ABORT"; break;
    case STATUS_NEWSIG : s = "NEWSIG"; break;
    case STATUS_GOODSIG: s = "GOODSIG"; break;
    case STATUS_KEYEXPIRED: s = "KEYEXPIRED"; break;
    case STATUS_KEYREVOKED: s = "KEYREVOKED"; break;
    case STATUS_BADSIG : s = "BADSIG"; break;
    case STATUS_ERRSIG : s = "ERRSIG"; break;
    case STATUS_BADARMOR : s = "BADARMOR"; break;
    case STATUS_RSA_OR_IDEA : s= "RSA_OR_IDEA"; break;
    case STATUS_TRUST_UNDEFINED: s = "TRUST_UNDEFINED"; break;
    case STATUS_TRUST_NEVER	 : s = "TRUST_NEVER"; break;
    case STATUS_TRUST_MARGINAL : s = "TRUST_MARGINAL"; break;
    case STATUS_TRUST_FULLY	 : s = "TRUST_FULLY"; break;
    case STATUS_TRUST_ULTIMATE : s = "TRUST_ULTIMATE"; break;
    case STATUS_GET_BOOL	 : s = "GET_BOOL"; break;
    case STATUS_GET_LINE	 : s = "GET_LINE"; break;
    case STATUS_GET_HIDDEN	 : s = "GET_HIDDEN"; break;
    case STATUS_GOT_IT	 : s = "GOT_IT"; break;
    case STATUS_SHM_INFO	 : s = "SHM_INFO"; break;
    case STATUS_SHM_GET	 : s = "SHM_GET"; break;
    case STATUS_SHM_GET_BOOL	 : s = "SHM_GET_BOOL"; break;
    case STATUS_SHM_GET_HIDDEN : s = "SHM_GET_HIDDEN"; break;
    case STATUS_NEED_PASSPHRASE: s = "NEED_PASSPHRASE"; break;
    case STATUS_VALIDSIG	 : s = "VALIDSIG"; break;
    case STATUS_SIG_ID	 : s = "SIG_ID"; break;
    case STATUS_ENC_TO	 : s = "ENC_TO"; break;
    case STATUS_NODATA	 : s = "NODATA"; break;
    case STATUS_BAD_PASSPHRASE : s = "BAD_PASSPHRASE"; break;
    case STATUS_NO_PUBKEY	 : s = "NO_PUBKEY"; break;
    case STATUS_NO_SECKEY	 : s = "NO_SECKEY"; break;
    case STATUS_NEED_PASSPHRASE_SYM: s = "NEED_PASSPHRASE_SYM"; break;
    case STATUS_NEED_PASSPHRASE_PIN: s = "NEED_PASSPHRASE_PIN"; break;
    case STATUS_DECRYPTION_FAILED: s = "DECRYPTION_FAILED"; break;
    case STATUS_DECRYPTION_OKAY: s = "DECRYPTION_OKAY"; break;
    case STATUS_MISSING_PASSPHRASE: s = "MISSING_PASSPHRASE"; break;
    case STATUS_GOOD_PASSPHRASE : s = "GOOD_PASSPHRASE"; break;
    case STATUS_GOODMDC	 : s = "GOODMDC"; break;
    case STATUS_BADMDC	 : s = "BADMDC"; break;
    case STATUS_ERRMDC	 : s = "ERRMDC"; break;
    case STATUS_IMPORTED	 : s = "IMPORTED"; break;
    case STATUS_IMPORT_OK	 : s = "IMPORT_OK"; break;
    case STATUS_IMPORT_CHECK   : s = "IMPORT_CHECK"; break;
    case STATUS_IMPORT_RES	 : s = "IMPORT_RES"; break;
    case STATUS_FILE_START	 : s = "FILE_START"; break;
    case STATUS_FILE_DONE	 : s = "FILE_DONE"; break;
    case STATUS_FILE_ERROR	 : s = "FILE_ERROR"; break;
    case STATUS_BEGIN_DECRYPTION:s = "BEGIN_DECRYPTION"; break;
    case STATUS_END_DECRYPTION : s = "END_DECRYPTION"; break;
    case STATUS_BEGIN_ENCRYPTION:s = "BEGIN_ENCRYPTION"; break;
    case STATUS_END_ENCRYPTION : s = "END_ENCRYPTION"; break;
    case STATUS_DELETE_PROBLEM : s = "DELETE_PROBLEM"; break;
    case STATUS_PROGRESS       : s = "PROGRESS"; break;
    case STATUS_SIG_CREATED    : s = "SIG_CREATED"; break;
    case STATUS_SESSION_KEY    : s = "SESSION_KEY"; break;
    case STATUS_NOTATION_NAME  : s = "NOTATION_NAME" ; break;
    case STATUS_NOTATION_DATA  : s = "NOTATION_DATA" ; break;
    case STATUS_POLICY_URL     : s = "POLICY_URL" ; break;
    case STATUS_BEGIN_STREAM   : s = "BEGIN_STREAM"; break;
    case STATUS_END_STREAM     : s = "END_STREAM"; break;
    case STATUS_KEY_CREATED    : s = "KEY_CREATED"; break;
    case STATUS_KEY_NOT_CREATED: s = "KEY_NOT_CREATED"; break;
    case STATUS_USERID_HINT    : s = "USERID_HINT"; break;
    case STATUS_UNEXPECTED     : s = "UNEXPECTED"; break;
    case STATUS_INV_RECP       : s = "INV_RECP"; break;
    case STATUS_NO_RECP        : s = "NO_RECP"; break;
    case STATUS_ALREADY_SIGNED : s = "ALREADY_SIGNED"; break;
    case STATUS_SIGEXPIRED     : s = "SIGEXPIRED deprecated-use-keyexpired-instead"; break;
    case STATUS_EXPSIG         : s = "EXPSIG"; break;
    case STATUS_EXPKEYSIG      : s = "EXPKEYSIG"; break;
    case STATUS_REVKEYSIG      : s = "REVKEYSIG"; break;
    case STATUS_ATTRIBUTE      : s = "ATTRIBUTE"; break;
    case STATUS_CARDCTRL       : s = "CARDCTRL"; break;
    case STATUS_PLAINTEXT      : s = "PLAINTEXT"; break;
    case STATUS_PLAINTEXT_LENGTH:s = "PLAINTEXT_LENGTH"; break;
    case STATUS_SIG_SUBPACKET  : s = "SIG_SUBPACKET"; break;
    case STATUS_SC_OP_SUCCESS  : s = "SC_OP_SUCCESS"; break;
    case STATUS_SC_OP_FAILURE  : s = "SC_OP_FAILURE"; break;
    case STATUS_BACKUP_KEY_CREATED:s="BACKUP_KEY_CREATED"; break;
    case STATUS_PKA_TRUST_BAD  : s = "PKA_TRUST_BAD"; break;
    case STATUS_PKA_TRUST_GOOD : s = "PKA_TRUST_GOOD"; break;
    case STATUS_BEGIN_SIGNING  : s = "BEGIN_SIGNING"; break;
    case STATUS_ERROR          : s = "ERROR"; break;
    default: s = "?"; break;
    }
  return s;
}


/* Return true if the status message NO may currently be issued.  We
   need this to avoid syncronisation problem while auto retrieving a
   key.  There it may happen that a status NODATA is issued for a non
   available key and the user may falsely interpret this has a missing
   signature. */
static int
status_currently_allowed (int no)
{
  if (!glo_ctrl.in_auto_key_retrieve)
    return 1; /* Yes. */

  /* We allow some statis anyway, so that import statistics are
     correct and to avoid problems if the retriebval subsystem will
     prompt the user. */
  switch (no)
    {
    case STATUS_GET_BOOL:	 
    case STATUS_GET_LINE:	 
    case STATUS_GET_HIDDEN:	 
    case STATUS_GOT_IT:	 
    case STATUS_IMPORTED:
    case STATUS_IMPORT_OK:	
    case STATUS_IMPORT_CHECK:  
    case STATUS_IMPORT_RES:
      return 1; /* Yes. */
    default:
      break;
    }
  return 0; /* No. */
}


void
set_status_fd ( int fd )
{
    static int last_fd = -1;

    if ( fd != -1 && last_fd == fd )
        return;

    if ( statusfp && statusfp != stdout && statusfp != stderr )
        fclose (statusfp);
    statusfp = NULL;
    if ( fd == -1 ) 
        return;

    if( fd == 1 )
	statusfp = stdout;
    else if( fd == 2 )
	statusfp = stderr;
    else
	statusfp = fdopen( fd, "w" );
    if( !statusfp ) {
	log_fatal("can't open fd %d for status output: %s\n",
                  fd, strerror(errno));
    }
    last_fd = fd;

    gcry_set_progress_handler ( progress_cb, NULL );
}

int
is_status_enabled()
{
    return !!statusfp;
}

void
write_status ( int no )
{
    write_status_text( no, NULL );
}

void
write_status_text ( int no, const char *text)
{
    if( !statusfp || !status_currently_allowed (no) )
	return;  /* Not enabled or allowed. */

    fputs ( "[GNUPG:] ", statusfp );
    fputs ( get_status_string (no), statusfp );
    if( text ) {
        putc ( ' ', statusfp );
        for (; *text; text++) {
            if (*text == '\n')
                fputs ( "\\n", statusfp );
            else if (*text == '\r')
                fputs ( "\\r", statusfp );
            else 
                putc ( *(const byte *)text,  statusfp );
        }
    }
    putc ('\n',statusfp);
    if ( fflush (statusfp) && opt.exit_on_status_write_error )
      g10_exit (0);
}


/*
 * Write a status line with a buffer using %XX escapes.  If WRAP is >
 * 0 wrap the line after this length.  If STRING is not NULL it will
 * be prepended to the buffer, no escaping is done for string.
 * A wrap of -1 forces spaces not to be encoded as %20.
 */
void
write_status_text_and_buffer ( int no, const char *string,
                               const char *buffer, size_t len, int wrap )
{
    const char *s, *text;
    int esc, first;
    int lower_limit = ' ';
    size_t n, count, dowrap;

    if( !statusfp || !status_currently_allowed (no) )
	return;  /* Not enabled or allowed. */
    
    if (wrap == -1) {
        lower_limit--;
        wrap = 0;
    }

    text = get_status_string (no);
    count = dowrap = first = 1;
    do {
        if (dowrap) {
            fprintf (statusfp, "[GNUPG:] %s ", text );
            count = dowrap = 0;
            if (first && string) {
                fputs (string, statusfp);
                count += strlen (string);
            }
            first = 0;
        }
        for (esc=0, s=buffer, n=len; n && !esc; s++, n-- ) {
            if ( *s == '%' || *(const byte*)s <= lower_limit 
                           || *(const byte*)s == 127 ) 
                esc = 1;
            if ( wrap && ++count > wrap ) {
                dowrap=1;
                break;
            }
        }
        if (esc) {
            s--; n++;
        }
        if (s != buffer) 
            fwrite (buffer, s-buffer, 1, statusfp );
        if ( esc ) {
            fprintf (statusfp, "%%%02X", *(const byte*)s );
            s++; n--;
        }
        buffer = s;
        len = n;
        if ( dowrap && len )
            putc ( '\n', statusfp );
    } while ( len );

    putc ('\n',statusfp);
    if ( fflush (statusfp) && opt.exit_on_status_write_error )
      g10_exit (0);
}

void
write_status_buffer ( int no, const char *buffer, size_t len, int wrap )
{
    write_status_text_and_buffer (no, NULL, buffer, len, wrap);
}


/* Print the BEGIN_SIGNING status message.  If MD is not NULL it is
   used retrieve the hash algorithms used for the message. */
void
write_status_begin_signing (gcry_md_hd_t md)
{
  if (md)
    {
      char buf[100];
      size_t buflen;
      int i;
      
      /* We use a hard coded list of possible algorithms.  Using other
         algorithms than specified by OpenPGP does not make sense
         anyway.  We do this out of performance reasons: Walking all
         the 110 allowed Ids is not a good idea given the way the
         check is implemented in libgcrypt.  Recall that the only use
         of this status code is to create the micalg algorithm for
         PGP/MIME. */
      buflen = 0;
      for (i=1; i <= 11; i++)
        if (i < 4 || i > 7)
          if ( gcry_md_is_enabled (md, i) && buflen < DIM(buf) )
            {
              snprintf (buf+buflen, DIM(buf) - buflen - 1, 
                        "%sH%d", buflen? " ":"",i);
              buflen += strlen (buf+buflen);
            }
      write_status_text ( STATUS_BEGIN_SIGNING, buf );
    }
  else
    write_status ( STATUS_BEGIN_SIGNING );
}


static int
myread(int fd, void *buf, size_t count)
{
    int rc;
    do {
        rc = read( fd, buf, count );
    } while ( rc == -1 && errno == EINTR );
    if ( !rc && count ) {
        static int eof_emmited=0;
        if ( eof_emmited < 3 ) {
            *(char*)buf = CONTROL_D;
            rc = 1;
            eof_emmited++;
        }
        else { /* Ctrl-D not caught - do something reasonable */
#ifdef HAVE_DOSISH_SYSTEM
            raise (SIGINT);  /* nothing to hangup under DOS */
#else
            raise (SIGHUP); /* no more input data */
#endif
        }
    }    
    return rc;
}



/****************
 * Request a string from the client over the command-fd
 * If bool, returns static string on true (do not free) or NULL for false
 */
static char *
do_get_from_fd( const char *keyword, int hidden, int bool )
{
    int i, len;
    char *string;

    if(statusfp!=stdout)
      fflush(stdout);

    write_status_text( bool? STATUS_GET_BOOL :
		       hidden? STATUS_GET_HIDDEN : STATUS_GET_LINE, keyword );

    for( string = NULL, i = len = 200; ; i++ ) {
	if( i >= len-1 ) {
	    char *save = string;
	    len += 100;
	    string = hidden? xmalloc_secure ( len ) : xmalloc ( len );
	    if( save )
		memcpy(string, save, i );
	    else
		i=0;
	}
	/* Hmmm: why not use our read_line function here */
	if( myread( opt.command_fd, string+i, 1) != 1 || string[i] == '\n'  )
            break;
        else if ( string[i] == CONTROL_D ) {
            /* found ETX - cancel the line and return a sole ETX */
            string[0] = CONTROL_D;
            i=1;
            break;
        }
    }
    string[i] = 0;

    write_status( STATUS_GOT_IT );

    if( bool )	 /* Fixme: is this correct??? */
	return (string[0] == 'Y' || string[0] == 'y') ? "" : NULL;

    return string;
}



int
cpr_enabled()
{
    if( opt.command_fd != -1 )
	return 1;
#ifdef USE_SHM_COPROCESSING
    if( opt.shm_coprocess )
	return 1;
#endif
    return 0;
}

char *
cpr_get_no_help( const char *keyword, const char *prompt )
{
    char *p;

    if( opt.command_fd != -1 )
	return do_get_from_fd ( keyword, 0, 0 );
#ifdef USE_SHM_COPROCESSING
    if( opt.shm_coprocess )
	return do_shm_get( keyword, 0, 0 );
#endif
    for(;;) {
	p = tty_get( prompt );
        return p;
    }
}

char *
cpr_get( const char *keyword, const char *prompt )
{
    char *p;

    if( opt.command_fd != -1 )
	return do_get_from_fd ( keyword, 0, 0 );
#ifdef USE_SHM_COPROCESSING
    if( opt.shm_coprocess )
	return do_shm_get( keyword, 0, 0 );
#endif
    for(;;) {
	p = tty_get( prompt );
	if( *p=='?' && !p[1] && !(keyword && !*keyword)) {
	    xfree(p);
	    display_online_help( keyword );
	}
	else
	    return p;
    }
}


char *
cpr_get_utf8( const char *keyword, const char *prompt )
{
    char *p;
    p = cpr_get( keyword, prompt );
    if( p ) {
	char *utf8 = native_to_utf8( p );
	xfree( p );
	p = utf8;
    }
    return p;
}

char *
cpr_get_hidden( const char *keyword, const char *prompt )
{
    char *p;

    if( opt.command_fd != -1 )
	return do_get_from_fd ( keyword, 1, 0 );
#ifdef USE_SHM_COPROCESSING
    if( opt.shm_coprocess )
	return do_shm_get( keyword, 1, 0 );
#endif
    for(;;) {
	p = tty_get_hidden( prompt );
	if( *p == '?' && !p[1] ) {
	    xfree(p);
	    display_online_help( keyword );
	}
	else
	    return p;
    }
}

void
cpr_kill_prompt(void)
{
    if( opt.command_fd != -1 )
	return;
#ifdef USE_SHM_COPROCESSING
    if( opt.shm_coprocess )
	return;
#endif
    tty_kill_prompt();
    return;
}

int
cpr_get_answer_is_yes( const char *keyword, const char *prompt )
{
    int yes;
    char *p;

    if( opt.command_fd != -1 )
	return !!do_get_from_fd ( keyword, 0, 1 );
#ifdef USE_SHM_COPROCESSING
    if( opt.shm_coprocess )
	return !!do_shm_get( keyword, 0, 1 );
#endif
    for(;;) {
	p = tty_get( prompt );
	trim_spaces(p); /* it is okay to do this here */
	if( *p == '?' && !p[1] ) {
	    xfree(p);
	    display_online_help( keyword );
	}
	else {
	    tty_kill_prompt();
	    yes = answer_is_yes(p);
	    xfree(p);
	    return yes;
	}
    }
}

int
cpr_get_answer_yes_no_quit( const char *keyword, const char *prompt )
{
    int yes;
    char *p;

    if( opt.command_fd != -1 )
	return !!do_get_from_fd ( keyword, 0, 1 );
#ifdef USE_SHM_COPROCESSING
    if( opt.shm_coprocess )
	return !!do_shm_get( keyword, 0, 1 );
#endif
    for(;;) {
	p = tty_get( prompt );
	trim_spaces(p); /* it is okay to do this here */
	if( *p == '?' && !p[1] ) {
	    xfree(p);
	    display_online_help( keyword );
	}
	else {
	    tty_kill_prompt();
	    yes = answer_is_yes_no_quit(p);
	    xfree(p);
	    return yes;
	}
    }
}


int
cpr_get_answer_okay_cancel (const char *keyword,
                            const char *prompt,
                            int def_answer)
{
  int yes;
  char *answer = NULL;
  char *p;

  if( opt.command_fd != -1 )
    answer = do_get_from_fd ( keyword, 0, 0 );
#ifdef USE_SHM_COPROCESSING
  else if( opt.shm_coprocess )
    answer = do_shm_get( keyword, 0, 0 );
#endif

  if (answer)
    {
      yes = answer_is_okay_cancel (answer, def_answer);
      xfree (answer);
      return yes;
    }

  for(;;)
    {
      p = tty_get( prompt );
      trim_spaces(p); /* it is okay to do this here */
      if (*p == '?' && !p[1])
        {
          xfree(p);
          display_online_help (keyword);
	}
      else
        {
          tty_kill_prompt();
          yes = answer_is_okay_cancel (p, def_answer);
          xfree(p);
          return yes;
	}
    }
}