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0de7d61437
* kbx/keybox-dump.c (_keybox_dump_blob): Remove setting of IN_RANGE and the last increment of P. -- Signed-off-by: Werner Koch <wk@gnupg.org>
806 lines
19 KiB
C
806 lines
19 KiB
C
/* keybox-dump.c - Debug helpers
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* Copyright (C) 2001, 2003 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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include "keybox-defs.h"
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#include <gcrypt.h>
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#include "host2net.h"
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/* Argg, we can't include ../common/util.h */
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char *bin2hexcolon (const void *buffer, size_t length, char *stringbuf);
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#define get32(a) buf32_to_ulong ((a))
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#define get16(a) buf16_to_ulong ((a))
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void
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print_string (FILE *fp, const byte *p, size_t n, int delim)
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{
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for ( ; n; n--, p++ )
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{
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if (*p < 0x20 || (*p >= 0x7f && *p < 0xa0) || *p == delim)
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{
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putc('\\', fp);
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if( *p == '\n' )
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putc('n', fp);
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else if( *p == '\r' )
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putc('r', fp);
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else if( *p == '\f' )
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putc('f', fp);
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else if( *p == '\v' )
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putc('v', fp);
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else if( *p == '\b' )
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putc('b', fp);
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else if( !*p )
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putc('0', fp);
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else
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fprintf(fp, "x%02x", *p );
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}
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else
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putc(*p, fp);
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}
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}
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static int
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print_checksum (const byte *buffer, size_t length, size_t unhashed, FILE *fp)
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{
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const byte *p;
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int i;
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int hashlen;
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unsigned char digest[20];
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fprintf (fp, "Checksum: ");
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if (unhashed && unhashed < 20)
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{
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fputs ("[specified unhashed sized too short]\n", fp);
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return 0;
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}
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if (!unhashed)
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{
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unhashed = 16;
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hashlen = 16;
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}
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else
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hashlen = 20;
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if (length < 5+unhashed)
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{
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fputs ("[blob too short for a checksum]\n", fp);
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return 0;
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}
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p = buffer + length - hashlen;
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for (i=0; i < hashlen; p++, i++)
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fprintf (fp, "%02x", *p);
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if (hashlen == 16) /* Compatibility method. */
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{
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gcry_md_hash_buffer (GCRY_MD_MD5, digest, buffer, length - 16);
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if (!memcmp (buffer + length - 16, digest, 16))
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fputs (" [valid]\n", fp);
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else
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fputs (" [bad]\n", fp);
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}
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else
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{
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gcry_md_hash_buffer (GCRY_MD_SHA1, digest, buffer, length - unhashed);
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if (!memcmp (buffer + length - hashlen, digest, hashlen))
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fputs (" [valid]\n", fp);
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else
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fputs (" [bad]\n", fp);
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}
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return 0;
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}
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static int
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dump_header_blob (const byte *buffer, size_t length, FILE *fp)
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{
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unsigned long n;
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if (length < 32)
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{
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fprintf (fp, "[blob too short]\n");
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return -1;
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}
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fprintf (fp, "Version: %d\n", buffer[5]);
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n = get16 (buffer + 6);
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fprintf( fp, "Flags: %04lX", n);
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if (n)
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{
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int any = 0;
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fputs (" (", fp);
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if ((n & 2))
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{
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if (any)
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putc (',', fp);
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fputs ("openpgp", fp);
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any++;
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}
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putc (')', fp);
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}
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putc ('\n', fp);
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if ( memcmp (buffer+8, "KBXf", 4))
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fprintf (fp, "[Error: invalid magic number]\n");
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n = get32 (buffer+16);
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fprintf( fp, "created-at: %lu\n", n );
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n = get32 (buffer+20);
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fprintf( fp, "last-maint: %lu\n", n );
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return 0;
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}
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/* Dump one block to FP */
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int
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_keybox_dump_blob (KEYBOXBLOB blob, FILE *fp)
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{
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const byte *buffer;
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size_t length;
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int type, i;
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ulong n, nkeys, keyinfolen;
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ulong nuids, uidinfolen;
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ulong nsigs, siginfolen;
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ulong rawdata_off, rawdata_len;
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ulong nserial;
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ulong unhashed;
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const byte *p;
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buffer = _keybox_get_blob_image (blob, &length);
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if (length < 32)
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{
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fprintf (fp, "[blob too short]\n");
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return -1;
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}
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n = get32( buffer );
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if (n > length)
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fprintf (fp, "[blob larger than length - output truncated]\n");
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else
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length = n; /* ignore the rest */
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fprintf (fp, "Length: %lu\n", n );
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type = buffer[4];
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switch (type)
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{
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case KEYBOX_BLOBTYPE_EMPTY:
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fprintf (fp, "Type: Empty\n");
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return 0;
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case KEYBOX_BLOBTYPE_HEADER:
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fprintf (fp, "Type: Header\n");
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return dump_header_blob (buffer, length, fp);
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case KEYBOX_BLOBTYPE_PGP:
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fprintf (fp, "Type: OpenPGP\n");
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break;
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case KEYBOX_BLOBTYPE_X509:
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fprintf (fp, "Type: X.509\n");
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break;
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default:
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fprintf (fp, "Type: %d\n", type);
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fprintf (fp, "[can't dump this blob type]\n");
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return 0;
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}
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fprintf (fp, "Version: %d\n", buffer[5]);
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if (length < 40)
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{
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fprintf (fp, "[blob too short]\n");
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return -1;
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}
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n = get16 (buffer + 6);
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fprintf( fp, "Blob-Flags: %04lX", n);
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if (n)
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{
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int any = 0;
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fputs (" (", fp);
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if ((n & 1))
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{
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fputs ("secret", fp);
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any++;
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}
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if ((n & 2))
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{
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if (any)
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putc (',', fp);
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fputs ("ephemeral", fp);
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any++;
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}
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putc (')', fp);
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}
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putc ('\n', fp);
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rawdata_off = get32 (buffer + 8);
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rawdata_len = get32 (buffer + 12);
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fprintf( fp, "Data-Offset: %lu\n", rawdata_off );
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fprintf( fp, "Data-Length: %lu\n", rawdata_len );
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if (rawdata_off > length || rawdata_len > length
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|| rawdata_off+rawdata_len > length
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|| rawdata_len + 4 > length
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|| rawdata_off+rawdata_len + 4 > length)
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fprintf (fp, "[Error: raw data larger than blob]\n");
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unhashed = length - rawdata_off - rawdata_len;
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fprintf (fp, "Unhashed: %lu\n", unhashed);
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nkeys = get16 (buffer + 16);
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fprintf (fp, "Key-Count: %lu\n", nkeys );
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if (!nkeys)
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fprintf (fp, "[Error: no keys]\n");
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if (nkeys > 1 && type == KEYBOX_BLOBTYPE_X509)
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fprintf (fp, "[Error: only one key allowed for X509]\n");
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keyinfolen = get16 (buffer + 18 );
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fprintf (fp, "Key-Info-Length: %lu\n", keyinfolen);
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/* fixme: check bounds */
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p = buffer + 20;
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for (n=0; n < nkeys; n++, p += keyinfolen)
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{
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ulong kidoff, kflags;
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fprintf (fp, "Key-Fpr[%lu]: ", n );
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for (i=0; i < 20; i++ )
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fprintf (fp, "%02X", p[i]);
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kidoff = get32 (p + 20);
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fprintf (fp, "\nKey-Kid-Off[%lu]: %lu\n", n, kidoff );
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fprintf (fp, "Key-Kid[%lu]: ", n );
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/* fixme: check bounds */
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for (i=0; i < 8; i++ )
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fprintf (fp, "%02X", buffer[kidoff+i] );
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kflags = get16 (p + 24 );
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fprintf( fp, "\nKey-Flags[%lu]: %04lX\n", n, kflags);
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}
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/* serial number */
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fputs ("Serial-No: ", fp);
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nserial = get16 (p);
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p += 2;
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if (!nserial)
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fputs ("none", fp);
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else
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{
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for (; nserial; nserial--, p++)
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fprintf (fp, "%02X", *p);
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}
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putc ('\n', fp);
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/* user IDs */
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nuids = get16 (p);
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fprintf (fp, "Uid-Count: %lu\n", nuids );
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uidinfolen = get16 (p + 2);
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fprintf (fp, "Uid-Info-Length: %lu\n", uidinfolen);
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/* fixme: check bounds */
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p += 4;
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for (n=0; n < nuids; n++, p += uidinfolen)
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{
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ulong uidoff, uidlen, uflags;
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uidoff = get32( p );
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uidlen = get32( p+4 );
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if (type == KEYBOX_BLOBTYPE_X509 && !n)
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{
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fprintf (fp, "Issuer-Off: %lu\n", uidoff );
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fprintf (fp, "Issuer-Len: %lu\n", uidlen );
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fprintf (fp, "Issuer: \"");
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}
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else if (type == KEYBOX_BLOBTYPE_X509 && n == 1)
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{
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fprintf (fp, "Subject-Off: %lu\n", uidoff );
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fprintf (fp, "Subject-Len: %lu\n", uidlen );
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fprintf (fp, "Subject: \"");
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}
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else
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{
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fprintf (fp, "Uid-Off[%lu]: %lu\n", n, uidoff );
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fprintf (fp, "Uid-Len[%lu]: %lu\n", n, uidlen );
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fprintf (fp, "Uid[%lu]: \"", n );
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}
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print_string (fp, buffer+uidoff, uidlen, '\"');
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fputs ("\"\n", fp);
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uflags = get16 (p + 8);
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if (type == KEYBOX_BLOBTYPE_X509 && !n)
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{
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fprintf (fp, "Issuer-Flags: %04lX\n", uflags );
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fprintf (fp, "Issuer-Validity: %d\n", p[10] );
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}
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else if (type == KEYBOX_BLOBTYPE_X509 && n == 1)
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{
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fprintf (fp, "Subject-Flags: %04lX\n", uflags );
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fprintf (fp, "Subject-Validity: %d\n", p[10] );
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}
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else
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{
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fprintf (fp, "Uid-Flags[%lu]: %04lX\n", n, uflags );
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fprintf (fp, "Uid-Validity[%lu]: %d\n", n, p[10] );
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}
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}
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nsigs = get16 (p);
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fprintf (fp, "Sig-Count: %lu\n", nsigs );
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siginfolen = get16 (p + 2);
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fprintf (fp, "Sig-Info-Length: %lu\n", siginfolen );
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/* fixme: check bounds */
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p += 4;
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{
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int in_range = 0;
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ulong first = 0;
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for (n=0; n < nsigs; n++, p += siginfolen)
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{
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ulong sflags;
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sflags = get32 (p);
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if (!in_range && !sflags)
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{
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in_range = 1;
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first = n;
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continue;
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}
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if (in_range && !sflags)
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continue;
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if (in_range)
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{
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fprintf (fp, "Sig-Expire[%lu-%lu]: [not checked]\n", first, n-1);
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in_range = 0;
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}
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fprintf (fp, "Sig-Expire[%lu]: ", n );
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if (!sflags)
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fputs ("[not checked]", fp);
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else if (sflags == 1 )
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fputs ("[missing key]", fp);
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else if (sflags == 2 )
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fputs ("[bad signature]", fp);
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else if (sflags < 0x10000000)
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fprintf (fp, "[bad flag %0lx]", sflags);
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else if (sflags == (ulong)(-1))
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fputs ("[good - does not expire]", fp );
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else
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fprintf (fp, "[good - expires at %lu]", sflags);
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putc ('\n', fp );
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}
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if (in_range)
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fprintf (fp, "Sig-Expire[%lu-%lu]: [not checked]\n", first, n-1);
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}
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fprintf (fp, "Ownertrust: %d\n", p[0] );
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fprintf (fp, "All-Validity: %d\n", p[1] );
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p += 4;
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n = get32 (p);
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p += 4;
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fprintf (fp, "Recheck-After: %lu\n", n );
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n = get32 (p );
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p += 4;
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fprintf( fp, "Latest-Timestamp: %lu\n", n );
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n = get32 (p );
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p += 4;
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fprintf (fp, "Created-At: %lu\n", n );
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n = get32 (p );
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fprintf (fp, "Reserved-Space: %lu\n", n );
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if (n >= 4 && unhashed >= 24)
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{
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n = get32 ( buffer + length - unhashed);
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fprintf (fp, "Storage-Flags: %08lx\n", n );
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}
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print_checksum (buffer, length, unhashed, fp);
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return 0;
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}
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/* Compute the SHA-1 checksum of the rawdata in BLOB and put it into
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DIGEST. */
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static int
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hash_blob_rawdata (KEYBOXBLOB blob, unsigned char *digest)
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{
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const unsigned char *buffer;
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size_t n, length;
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int type;
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ulong rawdata_off, rawdata_len;
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buffer = _keybox_get_blob_image (blob, &length);
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if (length < 32)
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return -1;
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n = get32 (buffer);
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if (n < length)
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length = n; /* Blob larger than length in header - ignore the rest. */
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type = buffer[4];
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switch (type)
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{
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case KEYBOX_BLOBTYPE_PGP:
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case KEYBOX_BLOBTYPE_X509:
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break;
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case KEYBOX_BLOBTYPE_EMPTY:
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case KEYBOX_BLOBTYPE_HEADER:
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default:
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memset (digest, 0, 20);
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return 0;
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}
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if (length < 40)
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return -1;
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rawdata_off = get32 (buffer + 8);
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rawdata_len = get32 (buffer + 12);
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if (rawdata_off > length || rawdata_len > length
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|| rawdata_off+rawdata_off > length)
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return -1; /* Out of bounds. */
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gcry_md_hash_buffer (GCRY_MD_SHA1, digest, buffer+rawdata_off, rawdata_len);
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return 0;
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}
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struct file_stats_s
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{
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unsigned long too_short_blobs;
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unsigned long too_large_blobs;
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unsigned long total_blob_count;
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unsigned long empty_blob_count;
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unsigned long header_blob_count;
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unsigned long pgp_blob_count;
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unsigned long x509_blob_count;
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unsigned long unknown_blob_count;
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unsigned long non_flagged;
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unsigned long secret_flagged;
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unsigned long ephemeral_flagged;
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unsigned long skipped_long_blobs;
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};
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static int
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update_stats (KEYBOXBLOB blob, struct file_stats_s *s)
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{
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const unsigned char *buffer;
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size_t length;
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int type;
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unsigned long n;
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buffer = _keybox_get_blob_image (blob, &length);
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if (length < 32)
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{
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s->too_short_blobs++;
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return -1;
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}
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n = get32( buffer );
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if (n > length)
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s->too_large_blobs++;
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else
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length = n; /* ignore the rest */
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s->total_blob_count++;
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type = buffer[4];
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switch (type)
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{
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case KEYBOX_BLOBTYPE_EMPTY:
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s->empty_blob_count++;
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return 0;
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case KEYBOX_BLOBTYPE_HEADER:
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s->header_blob_count++;
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return 0;
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case KEYBOX_BLOBTYPE_PGP:
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s->pgp_blob_count++;
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break;
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case KEYBOX_BLOBTYPE_X509:
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s->x509_blob_count++;
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break;
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default:
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s->unknown_blob_count++;
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return 0;
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}
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if (length < 40)
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{
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s->too_short_blobs++;
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return -1;
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}
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|
||
n = get16 (buffer + 6);
|
||
if (n)
|
||
{
|
||
if ((n & 1))
|
||
s->secret_flagged++;
|
||
if ((n & 2))
|
||
s->ephemeral_flagged++;
|
||
}
|
||
else
|
||
s->non_flagged++;
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
static FILE *
|
||
open_file (const char **filename, FILE *outfp)
|
||
{
|
||
FILE *fp;
|
||
|
||
if (!*filename)
|
||
{
|
||
*filename = "-";
|
||
fp = stdin;
|
||
}
|
||
else
|
||
fp = fopen (*filename, "rb");
|
||
if (!fp)
|
||
{
|
||
int save_errno = errno;
|
||
fprintf (outfp, "can't open '%s': %s\n", *filename, strerror(errno));
|
||
gpg_err_set_errno (save_errno);
|
||
}
|
||
return fp;
|
||
}
|
||
|
||
|
||
|
||
int
|
||
_keybox_dump_file (const char *filename, int stats_only, FILE *outfp)
|
||
{
|
||
FILE *fp;
|
||
KEYBOXBLOB blob;
|
||
int rc;
|
||
unsigned long count = 0;
|
||
struct file_stats_s stats;
|
||
|
||
memset (&stats, 0, sizeof stats);
|
||
|
||
if (!(fp = open_file (&filename, outfp)))
|
||
return gpg_error_from_syserror ();
|
||
|
||
for (;;)
|
||
{
|
||
rc = _keybox_read_blob (&blob, fp);
|
||
if (gpg_err_code (rc) == GPG_ERR_TOO_LARGE
|
||
&& gpg_err_source (rc) == GPG_ERR_SOURCE_KEYBOX)
|
||
{
|
||
if (stats_only)
|
||
stats.skipped_long_blobs++;
|
||
else
|
||
{
|
||
fprintf (outfp, "BEGIN-RECORD: %lu\n", count );
|
||
fprintf (outfp, "# Record too large\nEND-RECORD\n");
|
||
}
|
||
count++;
|
||
continue;
|
||
}
|
||
if (rc)
|
||
break;
|
||
|
||
if (stats_only)
|
||
{
|
||
update_stats (blob, &stats);
|
||
}
|
||
else
|
||
{
|
||
fprintf (outfp, "BEGIN-RECORD: %lu\n", count );
|
||
_keybox_dump_blob (blob, outfp);
|
||
fprintf (outfp, "END-RECORD\n");
|
||
}
|
||
_keybox_release_blob (blob);
|
||
count++;
|
||
}
|
||
if (rc == -1)
|
||
rc = 0;
|
||
if (rc)
|
||
fprintf (outfp, "# error reading '%s': %s\n", filename, gpg_strerror (rc));
|
||
|
||
if (fp != stdin)
|
||
fclose (fp);
|
||
|
||
if (stats_only)
|
||
{
|
||
fprintf (outfp,
|
||
"Total number of blobs: %8lu\n"
|
||
" header: %8lu\n"
|
||
" empty: %8lu\n"
|
||
" openpgp: %8lu\n"
|
||
" x509: %8lu\n"
|
||
" non flagged: %8lu\n"
|
||
" secret flagged: %8lu\n"
|
||
" ephemeral flagged: %8lu\n",
|
||
stats.total_blob_count,
|
||
stats.header_blob_count,
|
||
stats.empty_blob_count,
|
||
stats.pgp_blob_count,
|
||
stats.x509_blob_count,
|
||
stats.non_flagged,
|
||
stats.secret_flagged,
|
||
stats.ephemeral_flagged);
|
||
if (stats.skipped_long_blobs)
|
||
fprintf (outfp, " skipped long blobs: %8lu\n",
|
||
stats.skipped_long_blobs);
|
||
if (stats.unknown_blob_count)
|
||
fprintf (outfp, " unknown blob types: %8lu\n",
|
||
stats.unknown_blob_count);
|
||
if (stats.too_short_blobs)
|
||
fprintf (outfp, " too short blobs: %8lu (error)\n",
|
||
stats.too_short_blobs);
|
||
if (stats.too_large_blobs)
|
||
fprintf (outfp, " too large blobs: %8lu (error)\n",
|
||
stats.too_large_blobs);
|
||
}
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
|
||
struct dupitem_s
|
||
{
|
||
unsigned long recno;
|
||
unsigned char digest[20];
|
||
};
|
||
|
||
|
||
static int
|
||
cmp_dupitems (const void *arg_a, const void *arg_b)
|
||
{
|
||
struct dupitem_s *a = (struct dupitem_s *)arg_a;
|
||
struct dupitem_s *b = (struct dupitem_s *)arg_b;
|
||
|
||
return memcmp (a->digest, b->digest, 20);
|
||
}
|
||
|
||
|
||
int
|
||
_keybox_dump_find_dups (const char *filename, int print_them, FILE *outfp)
|
||
{
|
||
FILE *fp;
|
||
KEYBOXBLOB blob;
|
||
int rc;
|
||
unsigned long recno = 0;
|
||
unsigned char zerodigest[20];
|
||
struct dupitem_s *dupitems;
|
||
size_t dupitems_size, dupitems_count, lastn, n;
|
||
char fprbuf[3*20+1];
|
||
|
||
(void)print_them;
|
||
|
||
memset (zerodigest, 0, sizeof zerodigest);
|
||
|
||
if (!(fp = open_file (&filename, outfp)))
|
||
return gpg_error_from_syserror ();
|
||
|
||
dupitems_size = 1000;
|
||
dupitems = malloc (dupitems_size * sizeof *dupitems);
|
||
if (!dupitems)
|
||
{
|
||
gpg_error_t tmperr = gpg_error_from_syserror ();
|
||
fprintf (outfp, "error allocating array for '%s': %s\n",
|
||
filename, strerror(errno));
|
||
return tmperr;
|
||
}
|
||
dupitems_count = 0;
|
||
|
||
while ( !(rc = _keybox_read_blob (&blob, fp)) )
|
||
{
|
||
unsigned char digest[20];
|
||
|
||
if (hash_blob_rawdata (blob, digest))
|
||
fprintf (outfp, "error in blob %ld of '%s'\n", recno, filename);
|
||
else if (memcmp (digest, zerodigest, 20))
|
||
{
|
||
if (dupitems_count >= dupitems_size)
|
||
{
|
||
struct dupitem_s *tmp;
|
||
|
||
dupitems_size += 1000;
|
||
tmp = realloc (dupitems, dupitems_size * sizeof *dupitems);
|
||
if (!tmp)
|
||
{
|
||
gpg_error_t tmperr = gpg_error_from_syserror ();
|
||
fprintf (outfp, "error reallocating array for '%s': %s\n",
|
||
filename, strerror(errno));
|
||
free (dupitems);
|
||
return tmperr;
|
||
}
|
||
dupitems = tmp;
|
||
}
|
||
dupitems[dupitems_count].recno = recno;
|
||
memcpy (dupitems[dupitems_count].digest, digest, 20);
|
||
dupitems_count++;
|
||
}
|
||
_keybox_release_blob (blob);
|
||
recno++;
|
||
}
|
||
if (rc == -1)
|
||
rc = 0;
|
||
if (rc)
|
||
fprintf (outfp, "error reading '%s': %s\n", filename, gpg_strerror (rc));
|
||
if (fp != stdin)
|
||
fclose (fp);
|
||
|
||
qsort (dupitems, dupitems_count, sizeof *dupitems, cmp_dupitems);
|
||
|
||
for (lastn=0, n=1; n < dupitems_count; lastn=n, n++)
|
||
{
|
||
if (!memcmp (dupitems[lastn].digest, dupitems[n].digest, 20))
|
||
{
|
||
bin2hexcolon (dupitems[lastn].digest, 20, fprbuf);
|
||
fprintf (outfp, "fpr=%s recno=%lu", fprbuf, dupitems[lastn].recno);
|
||
do
|
||
fprintf (outfp, " %lu", dupitems[n].recno);
|
||
while (++n < dupitems_count
|
||
&& !memcmp (dupitems[lastn].digest, dupitems[n].digest, 20));
|
||
putc ('\n', outfp);
|
||
n--;
|
||
}
|
||
}
|
||
|
||
free (dupitems);
|
||
|
||
return rc;
|
||
}
|
||
|
||
|
||
/* Print records with record numbers FROM to TO to OUTFP. */
|
||
int
|
||
_keybox_dump_cut_records (const char *filename, unsigned long from,
|
||
unsigned long to, FILE *outfp)
|
||
{
|
||
FILE *fp;
|
||
KEYBOXBLOB blob;
|
||
int rc;
|
||
unsigned long recno = 0;
|
||
|
||
if (!(fp = open_file (&filename, stderr)))
|
||
return gpg_error_from_syserror ();
|
||
|
||
while ( !(rc = _keybox_read_blob (&blob, fp)) )
|
||
{
|
||
if (recno > to)
|
||
break; /* Ready. */
|
||
if (recno >= from)
|
||
{
|
||
if ((rc = _keybox_write_blob (blob, outfp)))
|
||
{
|
||
fprintf (stderr, "error writing output: %s\n",
|
||
gpg_strerror (rc));
|
||
goto leave;
|
||
}
|
||
}
|
||
_keybox_release_blob (blob);
|
||
recno++;
|
||
}
|
||
if (rc == -1)
|
||
rc = 0;
|
||
if (rc)
|
||
fprintf (stderr, "error reading '%s': %s\n", filename, gpg_strerror (rc));
|
||
leave:
|
||
if (fp != stdin)
|
||
fclose (fp);
|
||
return rc;
|
||
}
|