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Werner Koch 382ba4b137 gpg: Limit the size of key packets to a sensible value. 
* g10/parse-packet.c (MAX_KEY_PACKET_LENGTH): New.
(MAX_UID_PACKET_LENGTH): New.
(MAX_COMMENT_PACKET_LENGTH): New.
(MAX_ATTR_PACKET_LENGTH): New.
(parse_key): Limit the size of a key packet to 256k.
(parse_user_id): Use macro for the packet size limit.
(parse_attribute): Ditto.
(parse_comment): Ditto.
--

Without that it is possible to force gpg to allocate large amounts of
memory by using a bad encoded MPI.  This would be an too easy DoS.
Another way to mitigate would be to change the MPI read function to
allocate memory dynamically while reading the MPI.  However, that
complicates and possibly slows down the code.  A too large key packet
is in any case a sign for broken data and thus gpg should not use it.

Reported-by: Hanno Böck
GnuPG-bug-id: 1823
Signed-off-by: Werner Koch <wk@gnupg.org>
 		2015-01-28 20:32:28 +01:00
..
ChangeLog-2011 Generate the ChangeLog from commit logs. 2011-12-01 11:09:02 +01:00
Makefile.am Remove use of gnulib (part 1) 2014-11-11 10:13:10 +01:00
OPTIONS See ChangeLog: Mon Jul 31 10:04:47 CEST 2000 Werner Koch 2000-07-31 08:04:16 +00:00
armor.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
build-packet.c Avoid sign extension when shifting the MSB. 2014-11-05 08:23:15 +01:00
call-agent.c gpg: Re-enable the "Passphrase" parameter for batch key generation. 2015-01-21 11:31:20 +01:00
call-agent.h gpg: Re-enable the "Passphrase" parameter for batch key generation. 2015-01-21 11:31:20 +01:00
call-dirmngr.c Add option --no-autostart. 2014-11-28 09:44:19 +01:00
call-dirmngr.h gpg: Print the actual used keyserver address. 2014-03-14 16:12:54 +01:00
card-util.c gpg: Remove unused args from a function. 2015-01-05 15:15:36 +01:00
cipher.c gpg: Remove options --pgp2 and --rfc1991. 2014-08-14 11:03:55 +02:00
comment.c Nuked almost all trailing white space. 2011-02-04 12:57:53 +01:00
compress-bz2.c Nuked almost all trailing white space. 2011-02-04 12:57:53 +01:00
compress.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
cpr.c common: Add cpr_get_answer_is_yes_def() 2014-07-23 14:35:22 +02:00
dearmor.c gpg: Create exported secret files and revocs with mode 700. 2014-06-30 09:12:48 +02:00
decrypt-data.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
decrypt.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
dek.h gpg: Remove cipher.h and put algo ids into a common file. 2014-01-29 20:35:05 +01:00
delkey.c gpg: --delete-secret-key - check that a secret key exists. 2014-09-20 16:27:16 +02:00
distsigkey.gpg Add more signing keys. 2014-10-31 14:21:34 +01:00
ecdh.c gpg: Clear a possible rest of the KDF secret buffer. 2015-01-05 15:15:28 +01:00
encrypt.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
exec.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
exec.h Changed to GPLv3. 2007-07-04 19:49:40 +00:00
export.c gpg: Fix export bug using exact search with only one key in the keybox. 2014-12-01 11:54:51 +01:00
filter.h gpg: Remove PGP-2 related cruft. 2014-11-13 12:01:42 +01:00
free-packet.c gpg: Remove cipher.h and put algo ids into a common file. 2014-01-29 20:35:05 +01:00
getkey.c gpg: Add dedicated error code for PGP-2 keys. 2015-01-22 14:39:31 +01:00
gpg-w32info.rc w32: Add icons and version information. 2013-05-07 21:35:48 +02:00
gpg.c gpg: Fix buffering problem in --list-config. 2015-01-28 20:12:21 +01:00
gpg.h gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
gpgv.c Add a hook to be called right after main. 2015-01-28 19:57:22 +01:00
helptext.c Change all quotes in strings and comments to the new GNU standard. 2012-06-05 19:29:22 +02:00
import.c gpg: Add dedicated error code for PGP-2 keys. 2015-01-22 14:39:31 +01:00
kbnode.c gpg: Fix a missing LF in debug output. 2014-11-13 17:01:17 +01:00
keydb.c gpg: Improve skipping of PGP-2 keys. 2015-01-22 16:36:28 +01:00
keydb.h gpg: Fix informative printing of user ids. 2014-10-13 14:54:26 +02:00
keyedit.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
keygen.c gpg: Allow predefined names as answer to the keygen.algo prompt. 2015-01-28 09:12:36 +01:00
keyid.c gpg: Remove all support for v3 keys and always create v4-signatures. 2014-10-17 13:32:16 +02:00
keylist.c gpg: Improve skipping of PGP-2 keys. 2015-01-22 16:36:28 +01:00
keyring.c gpg: Improve skipping of PGP-2 keys. 2015-01-22 16:36:28 +01:00
keyring.h Decryption and signi via agent is now implemented. 2010-04-23 11:36:59 +00:00
keyserver-internal.h gpg: Remove unused args from a function. 2015-01-05 15:15:36 +01:00
keyserver.c gpg: Improve skipping of PGP-2 keys. 2015-01-22 16:36:28 +01:00
main.h gpg: Make the use of "--verify FILE" for detached sigs harder. 2014-11-13 17:39:31 +01:00
mainproc.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
mdfilter.c Nuked almost all trailing white space. 2011-02-04 12:57:53 +01:00
migrate.c gpg: Change wording of a migration error message. 2014-10-09 10:56:25 +02:00
misc.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
openfile.c gpg: Make the use of "--verify FILE" for detached sigs harder. 2014-11-13 17:39:31 +01:00
options.h gpg: Obsolete some keyserver helper options. 2014-12-08 15:14:35 +01:00
options.skel Change a couple of files to use abbreviated copyright notes. 2014-11-04 16:28:03 +01:00
packet.h gpg: Remove all support for v3 keys and always create v4-signatures. 2014-10-17 13:32:16 +02:00
parse-packet.c gpg: Limit the size of key packets to a sensible value. 2015-01-28 20:32:28 +01:00
passphrase.c Comment typo fixes. 2014-11-19 10:47:57 +01:00
photoid.c gpg: New %U expando for the photo viewer. 2014-04-17 21:44:09 +02:00
photoid.h Decryption and signi via agent is now implemented. 2010-04-23 11:36:59 +00:00
pkclist.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
pkglue.c gpg: Fix memory leak in ECC encryption. 2014-09-08 18:25:06 +02:00
pkglue.h gpg: Use only OpenPGP public key algo ids and add the EdDSA algo id. 2014-01-30 18:48:37 +01:00
plaintext.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
progress.c Nuked almost all trailing white space. 2011-02-04 12:57:53 +01:00
pubkey-enc.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
pubring.asc See ChangeLog: Mon Jul 31 10:04:47 CEST 2000 Werner Koch 2000-07-31 08:04:16 +00:00
revoke.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
rmd160.c Nuked almost all trailing white space. 2011-02-04 12:57:53 +01:00
rmd160.h Add missing header file. 2008-12-12 08:54:50 +00:00
seckey-cert.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
server.c Remove support for the GPG_AGENT_INFO envvar. 2014-10-03 11:58:58 +02:00
seskey.c gpg: Use only OpenPGP public key algo ids and add the EdDSA algo id. 2014-01-30 18:48:37 +01:00
sig-check.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
sign.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
signal.c Nuked almost all trailing white space. 2011-02-04 12:57:53 +01:00
skclist.c gpg: Remove cipher.h and put algo ids into a common file. 2014-01-29 20:35:05 +01:00
t-rmd160.c Nuked almost all trailing white space. 2011-02-04 12:57:53 +01:00
tdbdump.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
tdbio.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
tdbio.h gpg: Do not require a trustdb with --always-trust. 2014-03-07 10:44:27 +01:00
textfilter.c gpg: Remove all support for v3 keys and always create v4-signatures. 2014-10-17 13:32:16 +02:00
trust.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
trustdb.c gpg: Improve skipping of PGP-2 keys. 2015-01-22 16:36:28 +01:00
trustdb.h gpg: Allow building without any trust model support. 2014-02-10 17:46:40 +01:00
verify.c gpg: Replace remaining old error code macros by GPG_ERR_. 2015-01-22 12:06:11 +01:00
zlib-riscos.h include: Remove this directory. 2014-01-29 17:45:05 +01:00