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See ChangeLog: Mon Feb 21 22:43:01 CET 2000 Werner Koch

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Werner Koch 2000-02-21 21:38:43 +00:00
parent d8199e3094
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4 changed files with 593 additions and 1 deletions
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5
g10/ChangeLog
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@ -1,3 +1,8 @@
Mon Feb 21 22:43:01 CET 2000 Werner Koch <wk@>
* kbx.h: New.
* kbxblob.c: Started to work on the keybox stuff.
Mon Jan 31 16:37:34 CET 2000 Werner Koch <wk@gnupg.de>
* keygen.c (gen_dsa): Modified to work with gcry_pk_genkey.

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g10/kbx.h Normal file
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/* kbx.h - The GnuPG Keybox
* Copyright (C) 2000 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifndef GPG_KBX_H
#define GPG_KBX_H 1
#endif /*GPG_KBX_H*/

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g10/kbxblob.c Normal file
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/* kbxblob.c - KBX Blob handling
* Copyright (C) 2000 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
***********************************************
* adler_cksum() is based on the zlib code with these conditions:
*
* Copyright (C) 1995-1998 Mark Adler
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
/* The keybox data formats
The KeyBox uses an augmented OpenPGP key format. This makes random
access to a keyblock easier and also gives the opportunity to store
additional information (e.g. the fingerprint) along with the key.
All integers are stored in network byte order, offsets are counted from
the beginning of the Blob.
The first record of a plain KBX file has a special format:
u32 length of the first record
u32 magic 'KBXf'
byte version number (1)
b[3] reserved
byte marginals used for validity calculation of this file
byte completes ditto.
byte cert_depth ditto.
The standard KBX Blob looks like this:
u32 length of this blob (including these 4 bytes)
byte version number (1)
byte reserved
u16 Blob flags
bit 0 = contains secret key material
u32 offset to the OpenPGP keyblock
u32 length of the keyblock
u16 number of keys (at least 1!)
u16 size of additional key information
n times:
b20 The keys fingerprint
(fingerprints are always 20 bytes, MD5 left padded with zeroes)
u32 offset to the n-th key's keyID (a keyID is always 8 byte)
u16 special key flags
bit 0 =
u16 reserved
u16 number of user IDs
u16 size of additional user ID information
n times:
u32 offset to the n-th user ID
u32 length of this user ID.
u16 special user ID flags.
bit 0 =
byte validity
byte reserved
u16 number of signatures
u16 size of signature information (4)
u32 expiration time of signature with some special values:
0x00000000 = not checked
0x00000001 = missing key
0x00000002 = bad signature
0x10000000 = valid and expires at some date in 1978.
0xffffffff = valid and does not expire
u8 assigned ownertrust
u8 all_validity
u16 reserved
u32 recheck_after
u32 size of reserved space (not including this field)
reserved space
Here we might want to put other data
Here comes the keyblock
maybe we put a sigture here later.
u32 adler checksum
*
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <gcrypt.h>
#include "kbx.h"
/* special values of the signature status */
#define SF_NONE(a) ( !(a) )
#define SF_NOKEY(a) ((a) & (1<<0))
#define SF_BAD(a) ((a) & (1<<1))
#define SF_VALID(a) ((a) & (1<<29))
#if MAX_FINGERPRINT_LEN < 20
#error fingerprints are 20 bytes
#endif
struct kbxblob_key {
char fpr[20];
u32 off_kid;
ulong off_kid_addr; /* where it is stored in the datablock */
u16 flags;
};
struct kbxblob_uid {
u32 off;
ulong off_addr; /* where it is stored in the datablock */
u32 len;
u16 flags;
byte validity
};
struct keyid_list {
struct keyid_list *next;
int seqno;
char kid[8];
}
struct kbxblob {
int nkeys;
struct kbxblob_key *keys;
int nuids;
struct kbxblob_uid *uids;
int nsigs;
u32 *sigs;
struct keyid_list *temp_kids;
} *KBXBLOB;
static u32
adler_cksum ( const byte *buf, size_t len )
{
unsigned long s1 = 1;
unsigned long s2 = 0;
#define X_BASE 65521L /* largest prime smaller than 65536 */
#define X_NMAX 5552 /* largest n such that */
/* 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
#define X_DO1(buf,i) {s1 += buf[i]; s2 += s1;}
#define X_DO2(buf,i) X_DO1(buf,i); X_DO1(buf,i+1);
#define X_DO4(buf,i) X_DO2(buf,i); X_DO2(buf,i+2);
#define X_DO8(buf,i) X_DO4(buf,i); X_DO4(buf,i+4);
#define X_DO16(buf) X_DO8(buf,0); X_DO8(buf,8);
while ( len ) {
int k = len < NMAX ? len : NMAX;
len -= k;
while ( k >= 16 ) {
DO16(buf);
buf += 16;
k -= 16;
}
if ( k ) {
do {
s1 += *buf++;
s2 += s1;
} while ( --k );
}
s1 %= BASE;
s2 %= BASE;
}
#undef X_BASE
#undef X_NMAX
#undef X_DO1
#undef X_DO2
#undef X_DO4
#undef X_DO8
#undef X_DO16
return ( s2 << 16 ) | s1;
}
/* Note: this functions are only used for temportay iobufs and therefore
* they can't fail */
static void
put8 ( IOBUF out, byte a )
{
iobuf_put ( out, a )
}
static void
put16 ( IOBUF out, u16 a )
{
iobuf_put ( out, a>>8 );
iobuf_put ( out, a )
}
static void
put32 ( IOBUF out, u32 a )
{
iobuf_put (out, a>> 24);
iobuf_put (out, a>> 16);
iobuf_put (out, a>> 8);
iobuf_put (out, a) )
}
static void
putn ( IOBUF out, const byte *p, size_t n )
{
for ( ; n; p++, n-- ) {
iobuf_put ( out, *p );
}
}
/****************
* special version of put 32, which is used to fixup a value at file offset OFF
*/
static void
put32at ( IOBUF out, u32 a, size_t pos )
{
size_t n;
byte *p,
iobuf_flush_temp ( out );
p = iobuf_get_temp_buffer( out );
n = iobuf_get_temp_length( out );
assert( n >= pos+4 );
p[0] = a >> 24 ;
p[1] = a >> 16 ;
p[2] = a >> 8 ;
p[3] = a ;
}
/****************
* We must store the keyid at some place becuase we can't calculate the
* offset yet. This is only used for v3 keyIDs. Function returns an index
* value for later fixupd; this must be a non-zero value
*/
static int
temp_store_kid ( KBXBLOB blob, PKT_public_key *pk )
{
struct keyid_list *k, *r;
k = gcry_xmalloc ( sizeof *k );
k->kid = pk->keyid;
k->seqno = 0;
k->next = blob->temp_kids;
blob->temp_kids = k;
for ( r=k; r; r = r->next ) {
k->seqno++
}
return k->seqno;
}
static void
put_stored_kid( IOBUF a, KBXBLOB blob, int seqno )
{
struct keyid_list *r;
for ( r = blob->temp_kids; r; r = r->next ) {
if( r->seqno == seqno ) {
putn ( a, r->kid, 8 );
return;
}
}
BUG();
}
static int
release_kid_list ( struct keyid_list *kl )
{
struct keyid_list *r, *r2;
for ( r = blob->temp_kids; r; r = r2 ) {
r2 = r->next;
gcry_free( r );
}
}
static int
create_key_part( KBXBLOB blob, KBNODE keyblock )
{
KBNODE node;
byte fpr[MAX_FINGERPRINT_LEN];
size_t fprlen;
int n;
for ( n=0, node = keyblock; node; node = node->next ) {
if ( node->pkt->pkttype == PKT_PUBLIC_KEY:
|| node->pkt->pkttype == PKT_PUBLIC_SUBKEY ) {
PKT_public_key *pk = node->pkt->pkt.public_key;
fingerprint_from_pk( pk, blob->keys[n].fpr, &fprlen );
if ( fprlen != 20 ) { /*v3 fpr - shift right and fill with zeroes*/
assert( fprlen == 16 );
memmove( blob->keys[n]+4, blob->keys[n].fpr, 16);
memset( blob->keys[n].fpr, 0, 4 );
blob->keys[n].off_kid = temp_store_kid( blob, pk );
}
else {
blob->keys[n].off_kid = 0; /* will be fixed up later */
}
blob->keys[n].flags = 0;
n++;
}
else if ( node->pkt->pkttype == PKT_SECRET_KEY
|| node->pkt->pkttype == PKT_SECRET_SUBKEY ) {
BUG(); /* not yet implemented */
}
}
assert( n == blob->nkeys );
return 0;
}
static int
create_uid_part( KBXBLOB blob, KBNODE keyblock )
{
KBNODE node;
int n;
for ( n=0, node = keyblock; node; node = node->next ) {
if ( node->pkt->pkttype == PKT_USER_ID ) {
PKT_user_id *u = node->pkt->pkt.user_id;
blob->uids[n].off = 0; /* must calculate this later */
blob->uids[n].len = u->len;
blob->uids[n].flags = 0;
blob->uids[n].validity = 0;
n++;
}
}
assert( n == blob->nuids );
return 0;
}
static int
create_sig_part( KBXBLOB blob, KBNODE keyblock )
{
KBNODE node;
int n;
for ( n=0, node = keyblock; node; node = node->next ) {
if ( node->pkt->pkttype == PKT_SIGNATURE ) {
PKT_signature *sig = node->pkt->pkt.signature;
blob->sigs[n] = 0; /* FIXME: check the signature here */
n++;
}
}
assert( n == blob->nsigs );
return 0;
}
static int
create_blob_header( IOBUF a, KBXBLOB blob )
{
int i;
put32 ( a, 0 ); /* blob length, needs fixup */
put8 ( a, 1 ); /* version number */
put8 ( a, 0 ); /* reserved */
put16 ( a, 0 ); /* blob flags */
put32 ( a, 0 ); /* offset to the keyblock, needs fixup */
put32 ( a, 0 ); /* length of the keyblock, needs fixup */
put16 ( a, blob->nkeys );
put16 ( a, 20 + 8 + 2 + 2 ); /* size of key info */
for ( i=0; i < blob->nkeys; i++ ) {
putn ( a, blob->keys[i].fpr, 20 );
blob->keys[i].off_kid_addr = iobuf_tell ( out );
put32 ( a, 0 ); /* offset to keyid, fixed up later */
put16 ( a, blob->keys[i].flags );
put16 ( a, 0 ); /* reserved */
}
put16 ( a, blob->nuids );
put16 ( a, 4 + 4 + 2 + 1 + 1 ); /* size of uid info */
for ( i=0; i < blob->nuids; i++ ) {
blob->uids[i].off_addr = iobuf_tell ( out );
put32 ( a, 0 ); /* offset to userid, fixed up later */
put32 ( a, blob->uids[i].len );
put16 ( a, blob->uids[i].flags );
put8 ( a, 0 ); /* validity */
put8 ( a, 0 ); /* reserved */
}
put16 ( a, blob->nsigs );
put16 ( a, 4 ); /* size of sig info */
for ( i=0; i < blob->nsigs; i++ ) {
put32 ( a, blob->sigs[i] );
}
put8 ( a, 0 ); /* assigned ownertrust */
put8 ( a, 0 ); /* validity of all user IDs */
put16 ( a, 0 ); /* reserved */
put32 ( a, 0 ); /* time of next recheck */
put32 ( a, 0 ); /* size of reserved space */
/* reserved space (which is currently 0) */
/* We need to store the keyids for all v3 keys because those key IDs are
* not part of the fingerprint. While we are doing that, we fixup all
* the keyID offsets */
for ( i=0; i < blob->nkeys; i++ ) {
if ( blob->keys[i].off_kid ) { /* this is a v3 one */
put32at ( a, iobuf_tell(), blob->keys[i].off_kid_addr );
put_stored_kid ( a, blob, blob->keys[i].off_kid );
}
else { /* the better v4 key IDs - just store an offset 8 bytes back */
put32at ( a, blob->keys[i].off_kid_addr-8,
blob->keys[i].off_kid_addr );
}
}
return 0;
}
static int
create_blob_keyblock( IOBUF a, KBXBLOB blob, KBNODE keyblock )
{
KBNODE node;
int rc;
for ( node = keyblock; node; node = node->next ) {
/* we must get some offset into thge keyblock and do some
* fixups */
rc = build_packet ( fp, node->pkt );
if ( rc ) {
log_error("build_packet(%d) for kbxblob failed: %s\n",
node->pkt->pkttype, gpg_errstr(rc) );
return GPGERR_WRITE_FILE;
}
}
return 0;
}
static int
create_blob_trailer( IOBUF a, KBXBLOB blob )
{
return 0;
}
static int
create_blob_finish( IOBUF a, KBXBLOB blob )
{
/* fixup the length */
/* optionally we could sign the whole stuff at this point */
/* write the checksum */
return 0;
}
int
kbx_create_blob ( KBXBLOB *retkbx, KBNODE keyblock )
{
int rc = 0;
KBNODE node;
struct kbxblob *blob;
int nkey, nuid, nsig;
IOBUF a = NULL;
*retkbx = NULL;
blob = gcry_calloc (1, sizeof *blob );
if( !blob )
return GCRYERR_NO_MEM;
/* fixme: Do some sanity checks on the keyblock */
/* count userids and keys so that we can allocate the arrays */
for ( node = keyblock; node; node = node->next ) {
switch ( node->pkt->pkttype ) {
case PKT_PUBLIC_KEY:
case PKT_SECRET_KEY:
case PKT_PUBLIC_SUBKEY:
case PKT_SECRET_SUBKEY: blob->nkeys++; break;
case PKT_USER_ID: blob->nuids++; break;
case PKT_SIGNATURE: blob->nsigs++, break;
}
}
blob->nkeys = gcry_calloc ( blob->nkeys, sizeof ( blob->keys ) );
blob->nuids = gcry_calloc ( blob->nuids, sizeof ( blob->uids ) );
blob->nsigs = gcry_calloc ( blob->nsigs, sizeof ( blob->sigs ) );
if ( !blob->nkeys || !blob->nuids || !blob->nsigs ) {
rc = GCRYERR_NO_MEM;
goto leave;
}
rc = create_key_part ( blob, keyblock ),
if( rc )
goto leave;
rc = create_uid_part ( blob, keyblock ),
if( rc )
goto leave;
rc = create_sig_part ( blob, keyblock ),
if( rc )
goto leave;
a = iobuf_temp();
rc = create_blob_header ( a, blob );
if( rc )
goto leave;
rc = create_blob_keyblock ( a, blob, keyblock );
if( rc )
goto leave;
rc = create_blob_trailer ( a, blob );
if( rc )
goto leave;
rc = create_blob_finish ( a, blob );
if( rc )
goto leave;
/* now we take the iobuf and copy it to the output */
*retkbx = blob;
failure:
if( a )
iobuf_cancel( a );
release_kid_list( blob->temp_kids );
if ( rc ) {
gcry_free( blob->nkeys );
gcry_free( blob->nuids );
gcry_free( blob->nsigs );
gcry_free( blob );
}
return rc;
}

1
tools/ChangeLog
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@ -6,7 +6,6 @@ Mon Jan 31 17:46:35 CET 2000 Werner Koch <wk@>
Thu Jul 8 16:21:27 CEST 1999 Werner Koch <wk@isil.d.shuttle.de>
* lspgpot: New
Wed Jul 7 13:08:40 CEST 1999 Werner Koch <wk@isil.d.shuttle.de>