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 2 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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19  * USA.
  20  */
  21
  22 #include <config.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <errno.h>
  27 #include <assert.h>
  28
  29 #include "options.h"
  30 #include "packet.h"
  31 #include "errors.h"
  32 #include "iobuf.h"
  33 #include "memory.h"
  34 #include "util.h"
  35 #include "main.h"
  36 #include "keydb.h"
  37
  38
  39
  40 int
  41 write_comment( iobuf_t out, const char *s )
  42 {
  43     PACKET pkt;
  44     size_t n = strlen(s);
  45     int rc=0;
  46
  47     pkt.pkttype = PKT_COMMENT;
  48     if( *s != '#' ) {
  49        pkt.pkt.comment = xmalloc ( sizeof *pkt.pkt.comment + n );
  50        pkt.pkt.comment->len = n+1;
  51        *pkt.pkt.comment->data = '#';
  52        strcpy(pkt.pkt.comment->data+1, s);
  53     }
  54     else {
  55        pkt.pkt.comment = xmalloc ( sizeof *pkt.pkt.comment + n - 1 );
  56        pkt.pkt.comment->len = n;
  57        strcpy(pkt.pkt.comment->data, s);
  58     }
  59     if( (rc = build_packet( out, &pkt )) )
  60         log_error("build_packet(comment) failed: %s\n", gpg_strerror (rc) );
  61     free_packet( &pkt );
  62     return rc;
  63 }
  64
  65
  66 KBNODE
  67 make_comment_node_from_buffer (const char *s, size_t n)
  68 {
  69     PACKET *pkt;
  70
  71     pkt = gcry_xcalloc( 1, sizeof *pkt );
  72     pkt->pkttype = PKT_COMMENT;
  73     pkt->pkt.comment = gcry_xmalloc( sizeof *pkt->pkt.comment + n - 1 );
  74     pkt->pkt.comment->len = n;
  75     strcpy(pkt->pkt.comment->data, s);
  76     return new_kbnode( pkt );
  77 }
  78
  79 KBNODE
  80 make_comment_node( const char *s )
  81 {
  82   return make_comment_node_from_buffer (s, strlen (s));
  83 }
  84
  85
  86 KBNODE
  87 make_mpi_comment_node( const char *s, gcry_mpi_t a )
  88 {
  89     PACKET *pkt;
  90     byte *buf, *pp;
  91     size_t n1, nb1;
  92     size_t n = strlen(s);
  93
  94     nb1 = mpi_get_nbits( a );
  95     if (gcry_mpi_print (GCRYMPI_FMT_PGP, NULL, 0, &n1, a))
  96       BUG ();
  97     /* fixme: allocate it on the stack */
  98     buf = xmalloc (n1);
  99     if (gcry_mpi_print (GCRYMPI_FMT_PGP, buf, n1, &n1, a))
 100       BUG ();
 101
 102     pkt = xcalloc (1, sizeof *pkt );
 103     pkt->pkttype = PKT_COMMENT;
 104     pkt->pkt.comment = xmalloc ( sizeof *pkt->pkt.comment + n + 2 + n1 );
 105     pkt->pkt.comment->len = n+1+2+n1;
 106     pp = pkt->pkt.comment->data;
 107     memcpy(pp, s, n+1);
 108     memcpy(pp+n+1, buf, n1 );
 109     xfree (buf);
 110     return new_kbnode( pkt );
 111 }
 112
 113