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Commit1abf76e

Browse files
author
Neil Conway
committed
"Annual" pgcrypto update from Marko Kreen:
Few cleanups and couple of new things: - add SHA2 algorithm to older OpenSSL - add BIGNUM math to have public-key cryptography work on non-OpenSSL build. - gen_random_bytes() functionThe status of SHA2 algoritms and public-key encryption can now bechanged to 'always available.'That makes pgcrypto functionally complete and unless there will be neweditions of AES, SHA2 or OpenPGP standards, there is no major changesplanned.
1 parent99ac1e6 commit1abf76e

22 files changed

+4397
-374
lines changed

‎contrib/pgcrypto/Makefile

Lines changed: 9 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -1,29 +1,26 @@
11
#
2-
# $PostgreSQL: pgsql/contrib/pgcrypto/Makefile,v 1.23 2005/09/27 17:13:08 tgl Exp $
2+
# $PostgreSQL: pgsql/contrib/pgcrypto/Makefile,v 1.24 2006/07/13 04:15:24 neilc Exp $
33
#
44

5-
INT_SRCS = md5.c sha1.c sha2.c internal.c blf.c rijndael.c\
6-
fortuna.c random.c pgp-mpi-internal.c
5+
INT_SRCS = md5.c sha1.c sha2.c internal.cinternal-sha2.cblf.c rijndael.c\
6+
fortuna.c random.c pgp-mpi-internal.c imath.c
77
INT_TESTS = sha2
88

99
OSSL_SRCS = openssl.c pgp-mpi-openssl.c
10-
OSSL_TESTS = des 3des cast5
10+
OSSL_TESTS =sha2des 3des cast5
1111

1212
ZLIB_OFF_CFLAGS = -DDISABLE_ZLIB
1313
ZLIB_TST = pgp-compression
1414
ZLIB_OFF_TST = pgp-zlib-DISABLED
15-
PUBENC_ON = pgp-pubkey-decrypt pgp-pubkey-encrypt pgp-info
16-
PUBENC_OFF = pgp-pubkey-DISABLED
1715

1816
CF_SRCS =$(if$(subst no,,$(with_openssl)),$(OSSL_SRCS),$(INT_SRCS))
1917
CF_TESTS =$(if$(subst no,,$(with_openssl)),$(OSSL_TESTS),$(INT_TESTS))
2018
CF_CFLAGS =$(if$(subst yes,,$(with_zlib)),$(ZLIB_OFF_CFLAGS))
21-
CF_PGP_TESTS =$(if$(subst no,,$(with_zlib)),$(ZLIB_TST),$(ZLIB_OFF_TST))\
22-
$(if$(subst no,,$(with_openssl)),$(PUBENC_ON),$(PUBENC_OFF))
19+
CF_PGP_TESTS =$(if$(subst no,,$(with_zlib)),$(ZLIB_TST),$(ZLIB_OFF_TST))
2320

2421
PG_CPPFLAGS=$(CF_CFLAGS)
2522

26-
SRCS= pgcrypto.c px.c px-hmac.c px-crypt.cmisc.c\
23+
SRCS= pgcrypto.c px.c px-hmac.c px-crypt.c\
2724
crypt-gensalt.c crypt-blowfish.c crypt-des.c\
2825
crypt-md5.c$(CF_SRCS)\
2926
mbuf.c pgp.c pgp-armor.c pgp-cfb.c pgp-compress.c\
@@ -35,12 +32,14 @@ MODULE_big= pgcrypto
3532
OBJS=$(SRCS:.c=.o)
3633
DOCS= README.pgcrypto
3734
DATA_built= pgcrypto.sql
35+
DATA= uninstall_pgcrypto.sql
3836
EXTRA_CLEAN= gen-rtab
3937

4038
REGRESS = init md5 sha1 hmac-md5 hmac-sha1 blowfish rijndael\
4139
$(CF_TESTS)\
4240
crypt-des crypt-md5 crypt-blowfish crypt-xdes\
43-
pgp-armor pgp-decrypt pgp-encrypt$(CF_PGP_TESTS)
41+
pgp-armor pgp-decrypt pgp-encrypt$(CF_PGP_TESTS)\
42+
pgp-pubkey-decrypt pgp-pubkey-encrypt pgp-info
4443

4544

4645
ifdefUSE_PGXS

‎contrib/pgcrypto/README.pgcrypto

Lines changed: 28 additions & 14 deletions
Original file line numberDiff line numberDiff line change
@@ -49,14 +49,14 @@ There are some other differences with and without OpenSSL:
4949
----------------------------------------------------
5050
MD5 yes yes
5151
SHA1 yes yes
52-
SHA256/384/512yessince 0.9.8
52+
SHA224/256/384/512 yesyes (3)
5353
Any other digest algo no yes (1)
5454
Blowfish yes yes
5555
AES yes yes (2)
5656
DES/3DES/CAST5 no yes
5757
Raw encryption yes yes
5858
PGP Symmetric encryption yes yes
59-
PGP Public-Key encryptionno yes
59+
PGP Public-Key encryptionyes yes
6060
----------------------------------------------------
6161

6262
1. Any digest algorithm OpenSSL supports is automatically picked up.
@@ -67,6 +67,9 @@ There are some other differences with and without OpenSSL:
6767
compiled against older version, it will use built-in AES code,
6868
so it has AES always available.
6969

70+
3. SHA2 algorithms were added to OpenSSL in version 0.9.8. For
71+
older versions, pgcrypto will use built-in code.
72+
7073

7174
2.2. NULL handling
7275
~~~~~~~~~~~~~~~~~~~~
@@ -621,36 +624,47 @@ is equal to
621624
encrypt(data, 'fooz', 'bf-cbc/pad:pkcs')
622625

623626

624-
7. Credits
627+
7. Random bytes
628+
-----------------
629+
630+
gen_random_bytes(count integer)
631+
632+
Returns `count` cryptographically strong random bytes as bytea value.
633+
There can be maximally 1024 bytes extracted at a time. This is to avoid
634+
draining the randomness generator pool.
635+
636+
637+
8. Credits
625638
------------
626639

627640
I have used code from following sources:
628641

629-
`--------------------`-------------------------`----------------------
642+
`--------------------`-------------------------`-------------------------------
630643
Algorithm Author Source origin
631-
----------------------------------------------------------------------
644+
-------------------------------------------------------------------------------
632645
DES crypt() David Burren and others FreeBSD libcrypt
633646
MD5 crypt() Poul-Henning Kamp FreeBSD libcrypt
634647
Blowfish crypt() Solar Designer www.openwall.com
635648
Blowfish cipher Niels Provos OpenBSD sys/crypto
636649
Rijndael cipher Brian Gladman OpenBSD sys/crypto
637650
MD5 and SHA1 WIDE Project KAME kame/sys/crypto
638651
SHA256/384/512 Aaron D. Gifford OpenBSD sys/crypto
639-
----------------------------------------------------------------------
652+
BIGNUM math Michael J. Fromberger dartmouth.edu/~sting/sw/imath
653+
-------------------------------------------------------------------------------
640654

641655

642-
8. Legalese
656+
9. Legalese
643657
-------------
644658

645659
* I owe a beer to Poul-Henning.
646660
* This product includes software developed by Niels Provos.
647661

648662

649-
9. References/Links
650-
---------------------
663+
10. References/Links
664+
----------------------
651665

652-
9.1. Useful reading
653-
~~~~~~~~~~~~~~~~~~~~~
666+
10.1. Useful reading
667+
~~~~~~~~~~~~~~~~~~~~~~
654668

655669
http://www.gnupg.org/gph/en/manual.html[]::
656670
The GNU Privacy Handbook
@@ -668,8 +682,8 @@ http://www.interhack.net/people/cmcurtin/snake-oil-faq.html[]::
668682
Describes good and bad cryptography.
669683

670684

671-
9.2. Technical references
672-
~~~~~~~~~~~~~~~~~~~~~~~~~~~
685+
10.2. Technical references
686+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
673687

674688
http://www.ietf.org/rfc/rfc2440.txt[]::
675689
OpenPGP message format
@@ -699,4 +713,4 @@ http://www.cs.ut.ee/~helger/crypto/[]::
699713
Collection of cryptology pointers.
700714

701715

702-
// $PostgreSQL: pgsql/contrib/pgcrypto/README.pgcrypto,v 1.14 2005/11/03 02:54:07 tgl Exp $
716+
// $PostgreSQL: pgsql/contrib/pgcrypto/README.pgcrypto,v 1.15 2006/07/13 04:15:24 neilc Exp $

‎contrib/pgcrypto/crypt-des.c

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,7 @@
11
/*
22
* FreeSec: libcrypt for NetBSD
33
*
4-
* $PostgreSQL: pgsql/contrib/pgcrypto/crypt-des.c,v 1.14 2006/03/11 04:38:30 momjian Exp $
4+
* $PostgreSQL: pgsql/contrib/pgcrypto/crypt-des.c,v 1.15 2006/07/13 04:15:24 neilc Exp $
55
*
66
* Copyright (c) 1994 David Burren
77
* All rights reserved.
@@ -71,6 +71,9 @@
7171

7272
#define_PASSWORD_EFMT1 '_'
7373

74+
staticconstchar_crypt_a64[]=
75+
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
76+
7477
staticuint8IP[64]= {
7578
58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,4,
7679
62,54,46,38,30,22,14,6,64,56,48,40,32,24,16,8,

‎contrib/pgcrypto/crypt-gensalt.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@
22
* Written by Solar Designer and placed in the public domain.
33
* See crypt_blowfish.c for more information.
44
*
5-
* $PostgreSQL: pgsql/contrib/pgcrypto/crypt-gensalt.c,v 1.8 2006/03/11 04:38:30 momjian Exp $
5+
* $PostgreSQL: pgsql/contrib/pgcrypto/crypt-gensalt.c,v 1.9 2006/07/13 04:15:24 neilc Exp $
66
*
77
* This file contains salt generation functions for the traditional and
88
* other common crypt(3) algorithms, except for bcrypt which is defined
@@ -19,7 +19,7 @@
1919

2020
typedefunsignedintBF_word;
2121

22-
unsignedchar_crypt_itoa64[64+1]=
22+
staticunsignedchar_crypt_itoa64[64+1]=
2323
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
2424

2525
char*

‎contrib/pgcrypto/crypt-md5.c

Lines changed: 15 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
* $FreeBSD: src/lib/libcrypt/crypt-md5.c,v 1.5 1999/12/17 20:21:45 peter Exp $
1010
*
11-
* $PostgreSQL: pgsql/contrib/pgcrypto/crypt-md5.c,v 1.6 2005/10/15 02:49:06 momjian Exp $
11+
* $PostgreSQL: pgsql/contrib/pgcrypto/crypt-md5.c,v 1.7 2006/07/13 04:15:24 neilc Exp $
1212
*/
1313

1414
#include"postgres.h"
@@ -17,6 +17,20 @@
1717
#include"px-crypt.h"
1818

1919
#defineMD5_SIZE 16
20+
21+
staticconstchar_crypt_a64[]=
22+
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
23+
24+
staticvoid
25+
_crypt_to64(char*s,unsigned longv,intn)
26+
{
27+
while (--n >=0)
28+
{
29+
*s++=_crypt_a64[v&0x3f];
30+
v >>=6;
31+
}
32+
}
33+
2034
/*
2135
* UNIX password
2236
*/

‎contrib/pgcrypto/expected/sha2.out

Lines changed: 31 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,37 @@
11
--
22
-- SHA2 family
33
--
4+
-- SHA224
5+
SELECT encode(digest('', 'sha224'), 'hex');
6+
encode
7+
----------------------------------------------------------
8+
d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f
9+
(1 row)
10+
11+
SELECT encode(digest('a', 'sha224'), 'hex');
12+
encode
13+
----------------------------------------------------------
14+
abd37534c7d9a2efb9465de931cd7055ffdb8879563ae98078d6d6d5
15+
(1 row)
16+
17+
SELECT encode(digest('abc', 'sha224'), 'hex');
18+
encode
19+
----------------------------------------------------------
20+
23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7
21+
(1 row)
22+
23+
SELECT encode(digest('abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq', 'sha224'), 'hex');
24+
encode
25+
----------------------------------------------------------
26+
75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525
27+
(1 row)
28+
29+
SELECT encode(digest('12345678901234567890123456789012345678901234567890123456789012345678901234567890', 'sha224'), 'hex');
30+
encode
31+
----------------------------------------------------------
32+
b50aecbe4e9bb0b57bc5f3ae760a8e01db24f203fb3cdcd13148046e
33+
(1 row)
34+
435
-- SHA256
536
SELECT encode(digest('', 'sha256'), 'hex');
637
encode

‎contrib/pgcrypto/fortuna.c

Lines changed: 29 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -26,7 +26,7 @@
2626
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2727
* SUCH DAMAGE.
2828
*
29-
* $PostgreSQL: pgsql/contrib/pgcrypto/fortuna.c,v 1.6 2006/05/21 20:22:16 tgl Exp $
29+
* $PostgreSQL: pgsql/contrib/pgcrypto/fortuna.c,v 1.7 2006/07/13 04:15:24 neilc Exp $
3030
*/
3131

3232
#include"postgres.h"
@@ -125,7 +125,7 @@ struct fortuna_state
125125
structtimevallast_reseed_time;
126126
unsignedpool0_bytes;
127127
unsignedrnd_pos;
128-
intcounter_init;
128+
inttricks_done;
129129
};
130130
typedefstructfortuna_stateFState;
131131

@@ -332,7 +332,7 @@ add_entropy(FState * st, const uint8 *data, unsigned len)
332332
/*
333333
* Make sure the pool 0 is initialized, then update randomly.
334334
*/
335-
if (st->reseed_count==0&&st->pool0_bytes<POOL0_FILL)
335+
if (st->reseed_count==0)
336336
pos=0;
337337
else
338338
pos=get_rand_pool(st);
@@ -357,21 +357,34 @@ rekey(FState * st)
357357
}
358358

359359
/*
360-
* Fortuna relies on AES standing known-plaintext attack.
361-
* In case it does not, slow down the attacker by initialising
362-
* the couter to random value.
360+
* Hide public constants. (counter, pools > 0)
361+
*
362+
* This can also be viewed as spreading the startup
363+
* entropy over all of the components.
363364
*/
364365
staticvoid
365-
init_counter(FState*st)
366+
startup_tricks(FState*st)
366367
{
368+
inti;
369+
uint8buf[BLOCK];
370+
367371
/* Use next block as counter. */
368372
encrypt_counter(st,st->counter);
369373

374+
/* Now shuffle pools, excluding #0 */
375+
for (i=1;i<NUM_POOLS;i++)
376+
{
377+
encrypt_counter(st,buf);
378+
encrypt_counter(st,buf+CIPH_BLOCK);
379+
md_update(&st->pool[i],buf,BLOCK);
380+
}
381+
memset(buf,0,BLOCK);
382+
370383
/* Hide the key. */
371384
rekey(st);
372385

373-
/*The countercan beshuffled only once. */
374-
st->counter_init=1;
386+
/*Thiscan bedone only once. */
387+
st->tricks_done=1;
375388
}
376389

377390
staticvoid
@@ -380,13 +393,14 @@ extract_data(FState * st, unsigned count, uint8 *dst)
380393
unsignedn;
381394
unsignedblock_nr=0;
382395

383-
/* Can we reseed? */
384-
if (st->pool0_bytes >=POOL0_FILL&&enough_time_passed(st))
385-
reseed(st);
396+
/* Should we reseed? */
397+
if (st->pool0_bytes >=POOL0_FILL||st->reseed_count==0)
398+
if (enough_time_passed(st))
399+
reseed(st);
386400

387-
/*Is counter initialized? */
388-
if (!st->counter_init)
389-
init_counter(st);
401+
/*Do some randomization on first call */
402+
if (!st->tricks_done)
403+
startup_tricks(st);
390404

391405
while (count>0)
392406
{

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