| 1 |
/* Mixmaster version 3 -- (C) 1999 Anonymizer Inc.
|
| 2 |
|
| 3 |
Mixmaster may be redistributed and modified under certain conditions.
|
| 4 |
This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
|
| 5 |
ANY KIND, either express or implied. See the file COPYRIGHT for
|
| 6 |
details.
|
| 7 |
|
| 8 |
OpenPGP key database
|
| 9 |
$Id: pgpdb.c,v 1.8 2002/08/25 13:27:40 weaselp Exp $ */
|
| 10 |
|
| 11 |
|
| 12 |
#include "mix3.h"
|
| 13 |
#ifdef USE_PGP
|
| 14 |
#include "pgp.h"
|
| 15 |
#include <assert.h>
|
| 16 |
#include <stdlib.h>
|
| 17 |
#include <string.h>
|
| 18 |
#include <time.h>
|
| 19 |
|
| 20 |
static int pgp_readkeyring(BUFFER *keys, char *filename)
|
| 21 |
{
|
| 22 |
FILE *keyfile;
|
| 23 |
BUFFER *armored, *line, *tmp;
|
| 24 |
int err = -1;
|
| 25 |
|
| 26 |
if ((keyfile = mix_openfile(filename, "rb")) == NULL)
|
| 27 |
return (err);
|
| 28 |
|
| 29 |
armored = buf_new();
|
| 30 |
buf_read(armored, keyfile);
|
| 31 |
fclose(keyfile);
|
| 32 |
if (pgp_ispacket(armored)) {
|
| 33 |
err = 0;
|
| 34 |
buf_move(keys, armored);
|
| 35 |
} else {
|
| 36 |
line = buf_new();
|
| 37 |
tmp = buf_new();
|
| 38 |
|
| 39 |
while (1) {
|
| 40 |
do
|
| 41 |
if (buf_getline(armored, line) == -1) {
|
| 42 |
goto end_greedy_dearmor;
|
| 43 |
}
|
| 44 |
while (!bufleft(line, begin_pgp)) ;
|
| 45 |
buf_clear(tmp);
|
| 46 |
buf_appends(tmp, begin_pgp);
|
| 47 |
buf_appends(tmp, "\n");
|
| 48 |
buf_cat(tmp, armored);
|
| 49 |
|
| 50 |
if (pgp_dearmor(tmp, tmp) == 0) {
|
| 51 |
err = ARMORED;
|
| 52 |
buf_cat(keys, tmp);
|
| 53 |
}
|
| 54 |
}
|
| 55 |
end_greedy_dearmor:
|
| 56 |
buf_free(line);
|
| 57 |
buf_free(tmp);
|
| 58 |
}
|
| 59 |
buf_free(armored);
|
| 60 |
return (err);
|
| 61 |
}
|
| 62 |
|
| 63 |
KEYRING *pgpdb_open(char *keyring, BUFFER *encryptkey, int writer)
|
| 64 |
{
|
| 65 |
KEYRING *keydb;
|
| 66 |
|
| 67 |
keydb = pgpdb_new(keyring, -1, encryptkey);
|
| 68 |
if (writer)
|
| 69 |
keydb->lock = lockfile(keyring);
|
| 70 |
keydb->filetype = pgp_readkeyring(keydb->db, keyring);
|
| 71 |
#if 0
|
| 72 |
if (keydb->filetype == -1) {
|
| 73 |
pgpdb_close(keydb);
|
| 74 |
return (NULL);
|
| 75 |
}
|
| 76 |
#endif
|
| 77 |
if (encryptkey && encryptkey->length && pgp_isconventional(keydb->db) &&
|
| 78 |
pgp_decrypt(keydb->db, encryptkey, NULL, NULL, NULL) < 0) {
|
| 79 |
user_delpass();
|
| 80 |
return (NULL);
|
| 81 |
}
|
| 82 |
return (keydb);
|
| 83 |
}
|
| 84 |
|
| 85 |
KEYRING *pgpdb_new(char *keyring, int filetype, BUFFER *encryptkey)
|
| 86 |
{
|
| 87 |
KEYRING *keydb;
|
| 88 |
|
| 89 |
keydb = malloc(sizeof(KEYRING));
|
| 90 |
|
| 91 |
if (keydb == NULL)
|
| 92 |
return NULL;
|
| 93 |
keydb->db = buf_new();
|
| 94 |
keydb->modified = 0;
|
| 95 |
keydb->lock = NULL;
|
| 96 |
strncpy(keydb->filename, keyring, sizeof(keydb->filename));
|
| 97 |
keydb->filetype = filetype;
|
| 98 |
if (encryptkey == NULL)
|
| 99 |
keydb->encryptkey = NULL;
|
| 100 |
else {
|
| 101 |
keydb->encryptkey = buf_new();
|
| 102 |
buf_set(keydb->encryptkey, encryptkey);
|
| 103 |
}
|
| 104 |
return (keydb);
|
| 105 |
}
|
| 106 |
|
| 107 |
int pgpdb_close(KEYRING *keydb)
|
| 108 |
{
|
| 109 |
int err = 0;
|
| 110 |
|
| 111 |
if (keydb->modified) {
|
| 112 |
FILE *f;
|
| 113 |
|
| 114 |
if (keydb->encryptkey && keydb->encryptkey->length)
|
| 115 |
pgp_encrypt(PGP_NCONVENTIONAL | PGP_NOARMOR, keydb->db,
|
| 116 |
keydb->encryptkey, NULL, NULL, NULL, NULL);
|
| 117 |
if (keydb->filetype == ARMORED)
|
| 118 |
pgp_armor(keydb->db, PGP_ARMOR_KEY);
|
| 119 |
if (keydb->filetype == -1 || (f = mix_openfile(keydb->filename,
|
| 120 |
keydb->filetype ==
|
| 121 |
ARMORED ? "w" : "wb"))
|
| 122 |
== NULL)
|
| 123 |
err = -1;
|
| 124 |
else {
|
| 125 |
err = buf_write(keydb->db, f);
|
| 126 |
fclose(f);
|
| 127 |
}
|
| 128 |
}
|
| 129 |
if (keydb->lock)
|
| 130 |
unlockfile(keydb->lock);
|
| 131 |
if (keydb->encryptkey)
|
| 132 |
buf_free(keydb->encryptkey);
|
| 133 |
buf_free(keydb->db);
|
| 134 |
free(keydb);
|
| 135 |
return (err);
|
| 136 |
}
|
| 137 |
|
| 138 |
int pgpdb_getnext(KEYRING *keydb, BUFFER *key, BUFFER *keyid, BUFFER *userid)
|
| 139 |
/* store next key from keydb with specified keyid/userid in key. */
|
| 140 |
{
|
| 141 |
int found = 0;
|
| 142 |
int type;
|
| 143 |
long ptr;
|
| 144 |
int tempbuf = 0;
|
| 145 |
BUFFER *p, *i, *thisid;
|
| 146 |
|
| 147 |
p = buf_new();
|
| 148 |
i = buf_new();
|
| 149 |
thisid = buf_new();
|
| 150 |
|
| 151 |
if (key == NULL) {
|
| 152 |
tempbuf = 1;
|
| 153 |
key = buf_new();
|
| 154 |
}
|
| 155 |
assert(key != keyid);
|
| 156 |
while (!found) {
|
| 157 |
buf_clear(key);
|
| 158 |
type = pgp_getpacket(keydb->db, key);
|
| 159 |
if (type == -1)
|
| 160 |
break;
|
| 161 |
if (type != PGP_PUBKEY && type != PGP_SECKEY)
|
| 162 |
continue;
|
| 163 |
if ((keyid == NULL || keyid->length == 0) &&
|
| 164 |
(userid == NULL || userid->length == 0))
|
| 165 |
found = 1;
|
| 166 |
|
| 167 |
if (keyid && keyid->length > 0) {
|
| 168 |
pgp_keyid(key, thisid);
|
| 169 |
if (buf_eq(keyid, thisid))
|
| 170 |
found = 1;
|
| 171 |
}
|
| 172 |
|
| 173 |
pgp_packet(key, type);
|
| 174 |
|
| 175 |
while ((ptr = keydb->db->ptr, type = pgp_getpacket(keydb->db, p)) > 0) {
|
| 176 |
switch (type) {
|
| 177 |
case PGP_SECKEY:
|
| 178 |
case PGP_PUBKEY:
|
| 179 |
keydb->db->ptr = ptr;
|
| 180 |
goto nextkey;
|
| 181 |
case PGP_PUBSUBKEY:
|
| 182 |
case PGP_SECSUBKEY:
|
| 183 |
if (keyid && keyid->length > 0) {
|
| 184 |
pgp_keyid(p, thisid);
|
| 185 |
if (buf_eq(keyid, thisid))
|
| 186 |
found = 1;
|
| 187 |
}
|
| 188 |
break;
|
| 189 |
case PGP_USERID:
|
| 190 |
#ifdef DEBUG
|
| 191 |
printf("%s\n", p->data);
|
| 192 |
#endif
|
| 193 |
if (userid && userid->length > 0 && bufifind(p, userid->data))
|
| 194 |
found = 1;
|
| 195 |
break;
|
| 196 |
}
|
| 197 |
pgp_packet(p, type);
|
| 198 |
buf_cat(key, p);
|
| 199 |
}
|
| 200 |
nextkey:
|
| 201 |
;
|
| 202 |
}
|
| 203 |
if (tempbuf)
|
| 204 |
buf_free(key);
|
| 205 |
buf_free(p);
|
| 206 |
buf_free(i);
|
| 207 |
buf_free(thisid);
|
| 208 |
return (found ? 0 : -1);
|
| 209 |
}
|
| 210 |
|
| 211 |
int pgpdb_append(KEYRING *keydb, BUFFER *p)
|
| 212 |
{
|
| 213 |
assert(keydb->lock);
|
| 214 |
buf_cat(keydb->db, p);
|
| 215 |
keydb->modified = 1;
|
| 216 |
return (0);
|
| 217 |
}
|
| 218 |
|
| 219 |
#define pgp_preferredalgo PGP_ES_RSA
|
| 220 |
|
| 221 |
int pgpdb_getkey(int mode, int algo, int *sym, int *mdc, BUFFER *key, BUFFER *userid,
|
| 222 |
BUFFER *founduid, BUFFER *keyid, char *keyring, BUFFER *pass)
|
| 223 |
{
|
| 224 |
KEYRING *r;
|
| 225 |
BUFFER *id, *thisid, *thiskey;
|
| 226 |
int thisalgo, algofound = -1, needpass = 0;
|
| 227 |
int found = 0;
|
| 228 |
|
| 229 |
id = buf_new();
|
| 230 |
thisid = buf_new();
|
| 231 |
thiskey = buf_new();
|
| 232 |
if (keyring)
|
| 233 |
r = pgpdb_open(keyring, pass, 0);
|
| 234 |
else
|
| 235 |
switch (mode) {
|
| 236 |
case PK_DECRYPT:
|
| 237 |
case PK_SIGN:
|
| 238 |
r = pgpdb_open(PGPREMSECRING, NULL, 0);
|
| 239 |
break;
|
| 240 |
case PK_ENCRYPT:
|
| 241 |
case PK_VERIFY:
|
| 242 |
r = pgpdb_open(PGPREMPUBRING, NULL, 0);
|
| 243 |
if (r != NULL && r->filetype == -1) {
|
| 244 |
pgpdb_close(r);
|
| 245 |
r = pgpdb_open(PGPREMPUBASC, NULL, 0);
|
| 246 |
}
|
| 247 |
break;
|
| 248 |
default:
|
| 249 |
r = NULL;
|
| 250 |
}
|
| 251 |
if (r == NULL)
|
| 252 |
goto end;
|
| 253 |
|
| 254 |
for (;;) {
|
| 255 |
/* repeat until success or end of key ring */
|
| 256 |
if (pgpdb_getnext(r, thiskey, keyid, userid) == -1)
|
| 257 |
break;
|
| 258 |
if (keyid) /* pgp_getkey has to chose subkey with given keyid */
|
| 259 |
buf_set(thisid, keyid);
|
| 260 |
thisalgo = pgp_getkey(mode, algo, sym, mdc, thiskey, thiskey, thisid, founduid,
|
| 261 |
pass);
|
| 262 |
if (thisalgo == PGP_PASS)
|
| 263 |
needpass = 1;
|
| 264 |
if (thisalgo > 0) {
|
| 265 |
found++;
|
| 266 |
if ((thisalgo == pgp_preferredalgo && algofound != pgp_preferredalgo
|
| 267 |
&& algofound > 0)
|
| 268 |
|| (thisalgo != pgp_preferredalgo && algofound == pgp_preferredalgo))
|
| 269 |
found--; /* ignore the non-preferred algorithm */
|
| 270 |
if (found <= 1 || (thisalgo == pgp_preferredalgo &&
|
| 271 |
algofound != pgp_preferredalgo && algofound > 0)) {
|
| 272 |
algofound = thisalgo;
|
| 273 |
if (key)
|
| 274 |
buf_move(key, thiskey);
|
| 275 |
buf_set(id, thisid);
|
| 276 |
}
|
| 277 |
}
|
| 278 |
}
|
| 279 |
pgpdb_close(r);
|
| 280 |
end:
|
| 281 |
if (found < 1) {
|
| 282 |
if (needpass)
|
| 283 |
errlog(DEBUGINFO, "Need passphrase!\n");
|
| 284 |
else if (!sym || *sym != PGP_K_IDEA) { /* kludge: try again with 3DES */
|
| 285 |
if (userid)
|
| 286 |
errlog(NOTICE, "Key %b not found!\n", userid);
|
| 287 |
else if (keyid && keyid->length > 7)
|
| 288 |
errlog(NOTICE, "Key %02X%02X%02X%02X not found!\n", keyid->data[4],
|
| 289 |
keyid->data[5], keyid->data[6], keyid->data[7]);
|
| 290 |
}
|
| 291 |
}
|
| 292 |
if (found > 1) {
|
| 293 |
if (userid)
|
| 294 |
errlog(WARNING, "Key %b not unique!\n", userid);
|
| 295 |
else if (keyid && keyid->length > 7)
|
| 296 |
errlog(ERRORMSG, "Key %02X%02X%02X%02X not unique!\n", keyid->data[4],
|
| 297 |
keyid->data[5], keyid->data[6], keyid->data[7]);
|
| 298 |
else
|
| 299 |
errlog(WARNING, "Key not unique!\n");
|
| 300 |
}
|
| 301 |
if (found && keyid) /* return ID of found key */
|
| 302 |
buf_set(keyid, id);
|
| 303 |
|
| 304 |
buf_free(thiskey);
|
| 305 |
buf_free(thisid);
|
| 306 |
buf_free(id);
|
| 307 |
return (algofound);
|
| 308 |
}
|
| 309 |
|
| 310 |
int pgp_keymgt(int force)
|
| 311 |
{
|
| 312 |
FILE *f = NULL;
|
| 313 |
BUFFER *key, *userid, *out, *outkey, *outtxt, *pass;
|
| 314 |
KEYRING *keys;
|
| 315 |
int err = 0, type = 0;
|
| 316 |
|
| 317 |
key = buf_new();
|
| 318 |
out = buf_new();
|
| 319 |
|
| 320 |
userid = buf_new();
|
| 321 |
buf_sets(userid, REMAILERNAME);
|
| 322 |
pass = buf_new();
|
| 323 |
buf_sets(pass, PASSPHRASE);
|
| 324 |
outtxt = buf_new();
|
| 325 |
outkey = buf_new();
|
| 326 |
|
| 327 |
#ifdef USE_RSA
|
| 328 |
/* We only want to build RSA keys if we also can do IDEA
|
| 329 |
* This is to not lose any mail should users try our RSA key
|
| 330 |
* with IDEA.
|
| 331 |
*/
|
| 332 |
#ifdef USE_IDEA
|
| 333 |
if (force == 2 || (pgpdb_getkey(PK_DECRYPT, PGP_ES_RSA, NULL, NULL, NULL, NULL,
|
| 334 |
NULL, NULL, NULL, pass) < 0))
|
| 335 |
pgp_keygen(PGP_ES_RSA, 0, userid, pass, PGPKEY, PGPREMSECRING, 0);
|
| 336 |
|
| 337 |
if (force == 0 && (pgpdb_getkey(PK_ENCRYPT, PGP_ES_RSA, NULL, NULL, NULL, NULL,
|
| 338 |
NULL, NULL, PGPKEY, NULL) < 0))
|
| 339 |
goto end;
|
| 340 |
#endif
|
| 341 |
#endif
|
| 342 |
if (force == 2 || (pgpdb_getkey(PK_DECRYPT, PGP_E_ELG, NULL, NULL, NULL, NULL,
|
| 343 |
NULL, NULL, NULL, pass) < 0))
|
| 344 |
pgp_keygen(PGP_E_ELG, 0, userid, pass, PGPKEY, PGPREMSECRING, 0);
|
| 345 |
|
| 346 |
if (force == 0 && (pgpdb_getkey(PK_ENCRYPT, PGP_E_ELG, NULL, NULL, NULL, NULL,
|
| 347 |
NULL, NULL, PGPKEY, NULL) > 0))
|
| 348 |
goto end;
|
| 349 |
|
| 350 |
/* write RSA and DSA/ElGamal keys separately to make old PGP
|
| 351 |
versions happy */
|
| 352 |
err = -1;
|
| 353 |
for (type = 0; type < 2; type++) {
|
| 354 |
keys = pgpdb_open(PGPREMSECRING, NULL, 0);
|
| 355 |
if (keys == NULL)
|
| 356 |
goto end;
|
| 357 |
while (pgpdb_getnext(keys, key, NULL, userid) != -1) {
|
| 358 |
buf_clear(outkey);
|
| 359 |
buf_clear(outtxt);
|
| 360 |
if (pgp_makepubkey(key, outtxt, outkey, pass,
|
| 361 |
type == 0 ? PGP_ES_RSA : PGP_S_DSA) == 0) {
|
| 362 |
err = 0;
|
| 363 |
buf_appends(out, "Type Bits/KeyID Date User ID\n");
|
| 364 |
buf_cat(out, outtxt);
|
| 365 |
pgp_armor(outkey, PGP_ARMOR_KEY);
|
| 366 |
buf_nl(out);
|
| 367 |
buf_cat(out, outkey);
|
| 368 |
buf_nl(out);
|
| 369 |
}
|
| 370 |
}
|
| 371 |
pgpdb_close(keys);
|
| 372 |
}
|
| 373 |
|
| 374 |
if (err == 0 && (f = mix_openfile(PGPKEY, "w")) != NULL) {
|
| 375 |
buf_write(out, f);
|
| 376 |
fclose(f);
|
| 377 |
} else
|
| 378 |
err = -1;
|
| 379 |
end:
|
| 380 |
buf_free(key);
|
| 381 |
buf_free(out);
|
| 382 |
buf_free(userid);
|
| 383 |
buf_free(pass);
|
| 384 |
buf_free(outtxt);
|
| 385 |
buf_free(outkey);
|
| 386 |
return (err);
|
| 387 |
}
|
| 388 |
|
| 389 |
int pgp_rlist(REMAILER remailer[], int n)
|
| 390 |
/* verify that keys are available */
|
| 391 |
{
|
| 392 |
BUFFER *keyring, *p;
|
| 393 |
int i, type, pgpkey[MAXREM];
|
| 394 |
|
| 395 |
keyring = buf_new();
|
| 396 |
p = buf_new();
|
| 397 |
for (i = 1; i < n; i++)
|
| 398 |
pgpkey[i] = 0;
|
| 399 |
if (pgp_readkeyring(keyring, PGPREMPUBRING) == -1)
|
| 400 |
pgp_readkeyring(keyring, PGPREMPUBASC);
|
| 401 |
while ((type = pgp_getpacket(keyring, p)) != -1)
|
| 402 |
if (type == PGP_USERID)
|
| 403 |
for (i = 1; i < n; i++)
|
| 404 |
if (remailer[i].flags.pgp && bufifind(p, remailer[i].name))
|
| 405 |
pgpkey[i] = 1;
|
| 406 |
for (i = 1; i < n; i++)
|
| 407 |
remailer[i].flags.pgp = pgpkey[i];
|
| 408 |
buf_free(p);
|
| 409 |
buf_free(keyring);
|
| 410 |
return (0);
|
| 411 |
}
|
| 412 |
|
| 413 |
int pgp_rkeylist(REMAILER remailer[], int keyid[], int n)
|
| 414 |
/* Step through all remailers and get keyid */
|
| 415 |
{
|
| 416 |
BUFFER *userid;
|
| 417 |
BUFFER *id;
|
| 418 |
int i, err;
|
| 419 |
int mdc, sym;
|
| 420 |
|
| 421 |
userid = buf_new();
|
| 422 |
id = buf_new();
|
| 423 |
|
| 424 |
for (i = 1; i < n; i++) {
|
| 425 |
buf_clear(userid);
|
| 426 |
buf_setf(userid, "<%s>", remailer[i].addr);
|
| 427 |
|
| 428 |
keyid[i]=0;
|
| 429 |
if (remailer[i].flags.pgp) {
|
| 430 |
mdc = sym = 0;
|
| 431 |
buf_clear(id);
|
| 432 |
err = pgpdb_getkey(PK_VERIFY, PGP_ANY, &sym, &mdc, NULL, userid, NULL, id, NULL, NULL);
|
| 433 |
if (id->length == 8) {
|
| 434 |
/* printf("%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x %s\n",
|
| 435 |
id->data[0], id->data[1], id->data[2], id->data[3], id->data[4], id->data[5], id->data[6], id->data[7], id->data[8], remailer[i].addr); */
|
| 436 |
keyid[i] = (((((id->data[4] << 8) + id->data[5]) << 8) + id->data[6]) << 8) + id->data[7];
|
| 437 |
}
|
| 438 |
}
|
| 439 |
}
|
| 440 |
|
| 441 |
buf_free(userid);
|
| 442 |
return (0);
|
| 443 |
}
|
| 444 |
|
| 445 |
#endif /* USE_PGP */
|
Parent Directory
| 
Revision Log