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328 lines
8.7 KiB
C
328 lines
8.7 KiB
C
/* import.c - Import certificates
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* Copyright (C) 2001 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <time.h>
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#include <assert.h>
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#include <gcrypt.h>
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#include <ksba.h>
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#include "gpgsm.h"
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#include "keydb.h"
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#include "i18n.h"
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struct reader_cb_parm_s {
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FILE *fp;
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unsigned char line[1024];
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int linelen;
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int readpos;
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int have_lf;
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unsigned long line_counter;
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int identified;
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int is_pem;
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int stop_seen;
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struct {
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int idx;
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unsigned char val;
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int stop_seen;
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} base64;
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};
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/* static unsigned char bintoasc[] = */
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/* "ABCDEFGHIJKLMNOPQRSTUVWXYZ" */
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/* "abcdefghijklmnopqrstuvwxyz" */
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/* "0123456789+/"; */
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static unsigned char asctobin[256] = {
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
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0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
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0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12,
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0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24,
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0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
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0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff
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};
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static int
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reader_cb (void *cb_value, char *buffer, size_t count, size_t *nread)
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{
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struct reader_cb_parm_s *parm = cb_value;
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size_t n;
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int c, c2;
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*nread = 0;
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if (!buffer)
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return -1; /* not supported */
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next:
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if (!parm->linelen)
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{
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/* read an entire line or up to the size of the buffer */
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parm->line_counter++;
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parm->have_lf = 0;
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for (n=0; n < DIM(parm->line);)
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{
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c = getc (parm->fp);
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if (c == EOF)
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{
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if (ferror (parm->fp))
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return -1;
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break;
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}
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parm->line[n++] = c;
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if (c == '\n')
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{
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parm->have_lf = 1;
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/* FIXME: we need to skip overlong lines while detecting
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the dashed lines */
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break;
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}
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}
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parm->linelen = n;
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if (!n)
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return -1; /* eof */
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parm->readpos = 0;
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}
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if (!parm->identified)
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{
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if (parm->line_counter == 1 && !parm->have_lf)
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{
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/* first line too long - assume DER encoding */
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parm->is_pem = 0;
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}
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else if (parm->line_counter == 1 && parm->linelen && *parm->line == 0x30)
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{
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/* the very first bytes does pretty much look like a SEQUENCE tag*/
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parm->is_pem = 0;
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}
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else if ( parm->have_lf && !strncmp (parm->line, "-----BEGIN ", 11)
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&& strncmp (parm->line+11, "PGP ", 4) )
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{
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/* Fixme: we must only compare if the line really starts at
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the beginning */
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parm->is_pem = 1;
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parm->linelen = parm->readpos = 0;
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}
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else
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{
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parm->linelen = parm->readpos = 0;
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goto next;
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}
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parm->identified = 1;
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parm->base64.stop_seen = 0;
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parm->base64.idx = 0;
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}
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n = 0;
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if (parm->is_pem)
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{
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if (parm->have_lf && !strncmp (parm->line, "-----END ", 9))
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{
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parm->identified = 0;
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parm->linelen = parm->readpos = 0;
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/* let us return 0 */
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}
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else if (parm->stop_seen)
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{ /* skip the rest of the line */
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parm->linelen = parm->readpos = 0;
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}
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else
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{
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int idx = parm->base64.idx;
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unsigned char val = parm->base64.val;
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while (n < count && parm->readpos < parm->linelen )
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{
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c = parm->line[parm->readpos++];
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if (c == '\n' || c == ' ' || c == '\r' || c == '\t')
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continue;
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if (c == '=')
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{ /* pad character: stop */
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if (idx == 1)
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buffer[n++] = val;
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parm->stop_seen = 1;
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break;
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}
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if( (c = asctobin[(c2=c)]) == 255 )
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{
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log_error (_("invalid radix64 character %02x skipped\n"),
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c2);
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continue;
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}
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switch (idx)
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{
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case 0:
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val = c << 2;
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break;
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case 1:
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val |= (c>>4)&3;
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buffer[n++] = val;
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val = (c<<4)&0xf0;
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break;
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case 2:
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val |= (c>>2)&15;
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buffer[n++] = val;
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val = (c<<6)&0xc0;
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break;
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case 3:
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val |= c&0x3f;
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buffer[n++] = val;
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break;
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}
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idx = (idx+1) % 4;
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}
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if (parm->readpos == parm->linelen)
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parm->linelen = parm->readpos = 0;
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parm->base64.idx = idx;
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parm->base64.val = val;
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}
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}
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else
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{ /* DER encoded */
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while (n < count && parm->readpos < parm->linelen)
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buffer[n++] = parm->line[parm->readpos++];
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if (parm->readpos == parm->linelen)
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parm->linelen = parm->readpos = 0;
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}
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*nread = n;
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return 0;
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}
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static void
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store_cert (KsbaCert cert)
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{
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KEYDB_HANDLE kh;
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int rc;
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kh = keydb_new (0);
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if (!kh)
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{
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log_error (_("failed to allocated keyDB handle\n"));
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return;
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}
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rc = keydb_locate_writable (kh, 0);
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if (rc)
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log_error (_("error finding writable keyDB: %s\n"), gnupg_strerror (rc));
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rc = keydb_insert_cert (kh, cert);
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if (rc)
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{
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log_error (_("error storing certificate: %s\n"), gnupg_strerror (rc));
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}
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keydb_release (kh);
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}
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int
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gpgsm_import (CTRL ctrl, int in_fd)
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{
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int rc;
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KsbaReader reader = NULL;
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KsbaCert cert = NULL;
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struct reader_cb_parm_s rparm;
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memset (&rparm, 0, sizeof rparm);
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rparm.fp = fdopen ( dup (in_fd), "rb");
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if (!rparm.fp)
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{
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log_error ("fdopen() failed: %s\n", strerror (errno));
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rc = seterr (IO_Error);
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goto leave;
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}
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/* setup a skaba reader which uses a callback function so that we can
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strip off a base64 encoding when necessary */
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reader = ksba_reader_new ();
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if (!reader)
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{
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rc = seterr (Out_Of_Core);
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goto leave;
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}
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rc = ksba_reader_set_cb (reader, reader_cb, &rparm );
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if (rc)
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{
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ksba_reader_release (reader);
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rc = map_ksba_err (rc);
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goto leave;
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}
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cert = ksba_cert_new ();
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if (!cert)
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{
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rc = seterr (Out_Of_Core);
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goto leave;
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}
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rc = ksba_cert_read_der (cert, reader);
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if (rc)
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{
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rc = map_ksba_err (rc);
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goto leave;
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}
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if ( !gpgsm_validate_path (cert) )
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store_cert (cert);
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leave:
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ksba_cert_release (cert);
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ksba_reader_release (reader);
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if (rparm.fp)
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fclose (rparm.fp);
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return rc;
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}
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