g10/comment.c

   1 /* comment.c - write comment stuff
   2  *      Copyright (C) 1998, 2003 Free Software Foundation, Inc.
   3  *
   4  * This file is part of GnuPG.
   5  *
   6  * GnuPG is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GnuPG is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <errno.h>
  25 #include <assert.h>
  26
  27 #include "options.h"
  28 #include "packet.h"
  29 #include "errors.h"
  30 #include "iobuf.h"
  31 #include "util.h"
  32 #include "main.h"
  33 #include "keydb.h"
  34
  35
  36
  37 int
  38 write_comment( iobuf_t out, const char *s )
  39 {
  40     PACKET pkt;
  41     size_t n = strlen(s);
  42     int rc=0;
  43
  44     pkt.pkttype = PKT_COMMENT;
  45     if( *s != '#' ) {
  46        pkt.pkt.comment = xmalloc ( sizeof *pkt.pkt.comment + n );
  47        pkt.pkt.comment->len = n+1;
  48        *pkt.pkt.comment->data = '#';
  49        strcpy(pkt.pkt.comment->data+1, s);
  50     }
  51     else {
  52        pkt.pkt.comment = xmalloc ( sizeof *pkt.pkt.comment + n - 1 );
  53        pkt.pkt.comment->len = n;
  54        strcpy(pkt.pkt.comment->data, s);
  55     }
  56     if( (rc = build_packet( out, &pkt )) )
  57         log_error("build_packet(comment) failed: %s\n", gpg_strerror (rc) );
  58     free_packet( &pkt );
  59     return rc;
  60 }
  61
  62
  63 KBNODE
  64 make_comment_node_from_buffer (const char *s, size_t n)
  65 {
  66     PACKET *pkt;
  67
  68     pkt = gcry_xcalloc( 1, sizeof *pkt );
  69     pkt->pkttype = PKT_COMMENT;
  70     pkt->pkt.comment = gcry_xmalloc( sizeof *pkt->pkt.comment + n - 1 );
  71     pkt->pkt.comment->len = n;
  72     strcpy(pkt->pkt.comment->data, s);
  73     return new_kbnode( pkt );
  74 }
  75
  76 KBNODE
  77 make_comment_node( const char *s )
  78 {
  79   return make_comment_node_from_buffer (s, strlen (s));
  80 }
  81
  82
  83 KBNODE
  84 make_mpi_comment_node( const char *s, gcry_mpi_t a )
  85 {
  86     PACKET *pkt;
  87     byte *buf, *pp;
  88     size_t n1, nb1;
  89     size_t n = strlen(s);
  90
  91     nb1 = mpi_get_nbits( a );
  92     if (gcry_mpi_print (GCRYMPI_FMT_PGP, NULL, 0, &n1, a))
  93       BUG ();
  94     /* fixme: allocate it on the stack */
  95     buf = xmalloc (n1);
  96     if (gcry_mpi_print (GCRYMPI_FMT_PGP, buf, n1, &n1, a))
  97       BUG ();
  98
  99     pkt = xcalloc (1, sizeof *pkt );
 100     pkt->pkttype = PKT_COMMENT;
 101     pkt->pkt.comment = xmalloc ( sizeof *pkt->pkt.comment + n + 2 + n1 );
 102     pkt->pkt.comment->len = n+1+2+n1;
 103     pp = pkt->pkt.comment->data;
 104     memcpy(pp, s, n+1);
 105     memcpy(pp+n+1, buf, n1 );
 106     xfree (buf);
 107     return new_kbnode( pkt );
 108 }
 109
 110