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Author SHA1 Message Date
Denys Vlasenko
38972a8df1 tls: improve i/o loop 
With tls_has_buffered_record(), entire kernel.org response
is printed at once, without 6 second pause to see its delayed EOF.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-20 19:11:14 +01:00
Denys Vlasenko
e7863f394e tls: was psAesDecrypt'ing one block too many, trashing buffered data 
For the first time

printf "GET / HTTP/1.1\r\nHost: kernel.org\r\n\r\n" | ./busybox tls kernel.org

successfully reads entire server response and TLS shutdown.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-20 18:04:04 +01:00
Denys Vlasenko
6e511393f9 rdate: time(NULL) is shorter than time(&var) 
function                                             old     new   delta
rdate_main                                           251     246      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-20 16:07:14 +01:00
Denys Vlasenko
179e88bec9 rdate: make it do something remotely sane, facing 32-bit time overflow 
function                                             old     new   delta
rdate_main                                           251     254      +3
packed_usage                                       31029   31023      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-20 16:03:48 +01:00
Denys Vlasenko
19e695ebad tls: do not use common_bufsiz 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-20 14:27:58 +01:00
Denys Vlasenko
a0aae9f714 tls: decode alerts and in particular, EOF alert. 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-20 14:12:10 +01:00
Denys Vlasenko
abbf17abcc tls: add the i/o loop - largish rework of i/o buffering 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-20 03:15:09 +01:00
Denys Vlasenko
f7806f9d8f tls: fix ROL/ROR x86 optimization 
ALWAYS_INLINE:

function                                             old     new   delta
psAesInitKey                                         825     824      -1
ROR                                                    5       -      -5
setup_mix2                                           148     134     -14
psAesDecryptBlock                                   1184    1139     -45
psAesEncryptBlock                                   1193    1102     -91
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/4 up/down: 0/-156)           Total: -156 bytes

ALWAYS_INLINE + __builtin_constant_p(shift_cnt):

function                                             old     new   delta
ROR                                                    5       -      -5
psAesInitKey                                         825     818      -7
setup_mix2                                           148     123     -25
psAesDecryptBlock                                   1184    1078    -106
psAesEncryptBlock                                   1193    1017    -176
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/4 up/down: 0/-319)           Total: -319 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-19 16:45:41 +01:00
Denys Vlasenko
432f1ae2ff tls: tested PSTM_X86_64, not enabling it - too large 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-19 16:32:38 +01:00
Denys Vlasenko
6b1b004845 tls: commented out psPool_t use 
function                                             old     new   delta
psAesEncrypt                                         159     162      +3
der_binary_to_pstm                                    42      40      -2
xwrite_and_hash                                      437     434      -3
xread_tls_block                                      446     443      -3
pstm_div_2d                                          449     444      -5
psAesDecrypt                                         179     174      -5
pstm_init_size                                        52      45      -7
pstm_init                                             46      39      -7
pstm_to_unsigned_bin                                 165     157      -8
tls_main                                            1265    1256      -9
pstm_mulmod                                          132     123      -9
pstm_mod                                             125     116      -9
pstm_init_copy                                        93      84      -9
psAesInitKey                                         840     825     -15
send_client_key_exchange                             362     342     -20
psAesInit                                            103      80     -23
psRsaEncryptPub                                      429     403     -26
psAesDecryptBlock                                   1211    1184     -27
psAesEncryptBlock                                   1223    1193     -30
pstm_exptmod                                        1582    1524     -58
pstm_div                                            1557    1472     -85
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/20 up/down: 3/-360)          Total: -357 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-19 15:51:00 +01:00
Denys Vlasenko
1bfc4b85a7 ntpd: print result of hostname resolution 
This is particularly useful if hostname resolution is triggered by
host non-reachability: I saw this in real-life, without the message
it is not at all obvious that IP that we use for a specific host
has changed.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-19 14:42:34 +01:00
Denys Vlasenko
704c606f48 fdisk: add typical values of -H and -S to --help 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-19 14:29:42 +01:00
Denys Vlasenko
cccf8e735d tls: teach it to decrypt AES256-encrypted data 
This adds decryption only.
There is no MAC verification, code simply throws away MAC.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-19 00:20:45 +01:00
Denys Vlasenko
a9e1866806 tls: trim comments 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-18 21:00:23 +01:00
Denys Vlasenko
b5dfc3dfd6 tls: teach it to send AES256-encrypted data 
>> CLIENT_HELLO
wrote 50 bytes
insize:0 tail:0
got block len:74
got HANDSHAKE
<< SERVER_HELLO
insize:79 tail:0
got block len:2397
got HANDSHAKE
<< CERTIFICATE
key bytes:271, first:0x00
server_rsa_pub_key.size:256
insize:2402 tail:0
got block len:4
got HANDSHAKE
<< SERVER_HELLO_DONE
>> CLIENT_KEY_EXCHANGE
wrote 267 bytes
master secret:c51df5b1e3b3f57373cdd8ea28e8ce562059636cf9f585d0b89c7f4bacec97e674d7b91f93e7b500cb64637f240c3b78
client_write_MAC_key:3b0b7e2bab241b629c37eb3a3824f09b39fe71a00876b0c8026dda16ef0d2f82
client_write_key:d36e801470ed2f0a8fc886ac25df57ffbe4265d06e3192122c4ef4df1e32fab2
>> CHANGE_CIPHER_SPEC
from secret: c51df5b1e3b3f57373cdd8ea28e8ce562059636cf9f585d0b89c7f4bacec97e674d7b91f93e7b500cb64637f240c3b78
from labelSeed: 636c69656e742066696e6973686564b22e0e6008b8ee218cc02e4a93e4a42b570535f9b57662e262d43b379d125b69
=> digest: a45bfee8ed6507a2a9920d0c
>> FINISHED
before crypt: 5 hdr + 16 data + 32 hash bytes
writing 5 + 16 IV + 64 encrypted bytes, padding_length:0x0f
wrote 85 bytes
insize:9 tail:0
got block len:1
<< CHANGE_CIPHER_SPEC
insize:6 tail:0
got block len:80
< hdr_type:22 ver:3.3 len:80 type:21 len24:9541723 |1591985b...a3da|

The last line is the server's FINISHED response, encrypted.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-18 20:37:24 +01:00
Denys Vlasenko
b7e9ae6e9f tls: added AES code and made it compile. not used yet 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-18 17:20:27 +01:00
Denys Vlasenko
c8ba23bcec tls: massage writing for encryption support; finer-grained debug 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-18 06:45:50 +01:00
Denys Vlasenko
5d1662ea1c tls: address one easy FIXME, tidy up comments 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-17 18:17:27 +01:00
Denys Vlasenko
e69d78c038 tls: process CHANGE_CIPHER_SPEC and FINISHED from server 
Successfully finishes handshake with test servers using NULL-SHA256
cipher.

The "only" thing remaining before there is a chance
this can actually work with real servers is AES encrypt/decrypt.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-17 17:24:11 +01:00
Denys Vlasenko
fe0588df3b tls: rearrange function order, improve comments 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-17 17:04:24 +01:00
Denys Vlasenko
e2cb3b990f tls: make our send_client_finished() pass server check 
sha256 hash should be calculated over incoming handshake packets too!

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-17 16:53:36 +01:00
Denys Vlasenko
9a6897a48a tls: format FINISHED message properly for unencrypted, but sha256 signed mode 
Now it at least looks correct, but unfortunately "openssl s_server"
says my hash is wrong.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-16 23:26:33 +01:00
Denys Vlasenko
4e08a123b0 Assorted warning fixes and added a comment, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-16 17:31:05 +01:00
Denys Vlasenko
936e83e694 tls: add sha256 hmac and prf code 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-16 04:25:01 +01:00
Denys Vlasenko
6c73aaff38 cryptpw: support "rounds=NNNNNNN$" thing in salts 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-15 21:48:31 +01:00
Denys Vlasenko
16e7f697f8 libbb: eliminate redundant variable in sha_crypt 
function                                             old     new   delta
sha_crypt                                           1136    1130      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-15 20:59:32 +01:00
Denys Vlasenko
b8935d00b0 sha512: use larger constant table only if sha512 is in fact selected 
function                                             old     new   delta
sha_K                                                640     256    -384

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-15 20:16:27 +01:00
Denys Vlasenko
3f8ecd933a tls: rearrange code, add/improve comments, fix whitespace, no real changes here 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-15 14:16:51 +01:00
Denys Vlasenko
c5540d61f6 tls: send CHANGE_CIPHER_SPEC 
To "actually implement it" will take more work...

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-15 02:17:03 +01:00
Denys Vlasenko
f78ad0938b whitespace fix 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-15 00:18:22 +01:00
Denys Vlasenko
11d0096516 tls: format and send CLIENT_KEY_EXCHANGE 
$ ./busybox tls kernel.org
insize:0 tail:0
got block len:74
got HANDSHAKE
got SERVER_HELLO
insize:79 tail:4265
got block len:4392
got HANDSHAKE
got CERTIFICATE
entered der @0x8b217a7:0x30 len:1452 inner_byte @0x8b217ab:0x30
entered der @0x8b217ab:0x30 len:1172 inner_byte @0x8b217af:0xa0
skipped der 0xa0, next byte 0x02
skipped der 0x02, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
entered der @0x8b218b4:0x30 len:418 inner_byte @0x8b218b8:0x30
skipped der 0x30, next byte 0x03
entered der @0x8b218c7:0x03 len:399 inner_byte @0x8b218cb:0x00
key bytes:399, first:0x00
entered der @0x8b218cc:0x30 len:394 inner_byte @0x8b218d0:0x02
binary bytes:385, first:0x00
skipped der 0x02, next byte 0x02
binary bytes:3, first:0x01
server_rsa_pub_key.size:384
insize:4397 tail:9
got block len:4
got SERVER_HELLO_DONE
insize:9 tail:0
^C

Next step: send CHANGE_CIPHER_SPEC... and actually implement it.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-15 00:12:42 +01:00
Denys Vlasenko
2a17d1fc9b tls: DER length byte 0x81 is actually valid 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-14 22:38:25 +01:00
Denys Vlasenko
b1003f7019 tls: a bit more work 
$ ./busybox tls kernel.org
insize:0 tail:0
got block len:74
got HANDSHAKE
got SERVER_HELLO
insize:79 tail:4406
got block len:4392
got HANDSHAKE
got CERTIFICATE
entered der @0x8f7e723:0x30 len:1452 inner_byte @0x8f7e727:0x30
entered der @0x8f7e727:0x30 len:1172 inner_byte @0x8f7e72b:0xa0
skipped der 0xa0, next byte 0x02
skipped der 0x02, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
entered der @0x8f7e830:0x30 len:418 inner_byte @0x8f7e834:0x30
skipped der 0x30, next byte 0x03
entered der @0x8f7e843:0x03 len:399 inner_byte @0x8f7e847:0x00
copying key bytes:399, first:0x00
insize:4397 tail:9
got block len:4
got SERVER_HELLO_DONE

Now need to teach it to send ClientKeyExchange...

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-14 13:57:16 +01:00
Denys Vlasenko
ceff6b0ea9 tls: work-in-progress TLS1.2 test applet 
function                                             old     new   delta
tls_main                                               -     733    +733
dump                                                   -     230    +230
xread_tls_block                                        -     180    +180
get_der_len                                            -      76     +76
enter_der_item                                         -      70     +70
skip_der_item                                          -      56     +56
get24be                                                -      24     +24
tls_error_die                                          -      19     +19
packed_usage                                       31010   31027     +17
applet_names                                        2549    2553      +4
applet_main                                         1472    1476      +4
applet_suid                                           92      93      +1
applet_install_loc                                   184     185      +1
------------------------------------------------------------------------------
(add/remove: 9/0 grow/shrink: 5/0 up/down: 1415/0)           Total: 1415 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-14 12:49:32 +01:00
Denys Vlasenko
a6f8651911 wget: fix for brain-damaged HTTP servers. Closes 9471 
write(3, "GET / HTTP/1.1\r\nUser-Agent: Wget\r\nConnection: close\r\n\r\n", 74) = 74
shutdown(3, SHUT_WR)    = 0
alarm(900)              = 900
read(3, "", 1024)       = 0
write(2, "wget: error getting response\n", 29) = 29
exit(1)

The peer simply does not return anything. It closes its connection.

Probably it detects wget closing its writing end: shutdown(3, SHUT_WR).

The point it, closing write side of the socket is _valid_ for HTTP.
wget sent the full request, it won't be sending anything more:
it will only receive the response, and that's it.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 20:16:45 +01:00
Denys Vlasenko
098b713c7b ash: commented-out possible fix for 7694 
bash has a feature: it restores termios after a successful wait for
a foreground job which had at least one stopped or sigkilled member.
The probable rationale is that SIGSTOP and SIGKILL can preclude task from
properly restoring tty state. Should we do this too?
A reproducer: ^Z an interactive python:

$ python
Python 2.7.12 (...)
>>> ^Z
    { python leaves tty in -icanon -echo state. We do survive that... }
 [1]+  Stopped                    python
    { ...however, next program (python no.2) does not survive it well: }
$ python
Python 2.7.12 (...)
>>> Traceback (most recent call last):
    { above, I typed "qwerty<CR>", but -echo state is still in effect }
  File "<stdin>", line 1, in <module>
NameError: name 'qwerty' is not defined

The implementation is modeled on bash code and seems to work.
However, I'm not sure we should do this. For one: what if I'd fg
the stopped python instead? It'll be confused by "restored" tty state.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 19:59:03 +01:00
Denys Vlasenko
4c179373e0 ash: 16-bit ->nprocs field is a pain for many CPUs 
function                                             old     new   delta
getoptscmd                                           527     540     +13
getjob                                               280     286      +6
makejob                                              278     282      +4
forkchild                                            602     600      -2
waitcmd                                              208     205      -3
showjob                                              382     379      -3
getstatus                                             83      80      -3
dowait                                               408     405      -3
freejob                                               93      89      -4
fg_bgcmd                                             290     286      -4
forkshell                                            260     255      -5
killcmd                                              224     218      -6
jobno                                                 17      11      -6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/10 up/down: 23/-39)           Total: -16 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 18:44:15 +01:00
Denys Vlasenko
ed15dde60a Move FEATURE_AUTOWIDTH config option to two applets which use it 
No code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 16:35:52 +01:00
Denys Vlasenko
6c1f348fa7 Move FEATURE_USE_TERMIOS config option to two applets which use it 
No code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 16:27:12 +01:00
Denys Vlasenko
01ccdd1d3c libbb: consolidate the code to set termios unbuffered mode 
function                                             old     new   delta
set_termios_to_raw                                     -     116    +116
count_lines                                           72      74      +2
powertop_main                                       1458    1430     -28
top_main                                             943     914     -29
more_main                                            759     714     -45
fsck_minix_main                                     2969    2921     -48
conspy_main                                         1197    1135     -62
rawmode                                               99      36     -63
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/6 up/down: 118/-275)         Total: -157 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 16:17:59 +01:00
Denys Vlasenko
8944c67b1f hush: reinstate [[ builtin 
Mike deleted it:

    commit 39456a18a1
    Author: Mike Frysinger <vapier@gentoo.org>
    Date:   Sat Mar 28 12:21:57 2009 +0000

    stop lying about [[ test support

probably because it was not properly ifdefed around, and was enabled
even when bash compat is off.

I just tested it - it works:

$ [ *.diff = z.diff ]; echo $?
0
$ [[ *.diff = z.diff ]]; echo $?
1

Of course, not all numerous bash tricks of [[ ]] are implemented...

function                                             old     new   delta
bltins2                                               60      72     +12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 14:22:00 +01:00
Kang-Che Sung
027d3ab57d hush: split bash compatible extensions into separate defines. No code changes 
Splitting these options makes it self-documenting about what
bash-compatible features we have.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 14:18:30 +01:00
Denys Vlasenko
7d4aec0c3e ash: split bash compatible extensions into separate defines. No code changes 
Splitting these options makes it self-documenting about what
bash-compatible features we have.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 14:00:38 +01:00
Denys Vlasenko
a8a075acfe busybox: stop depending on FEATURE_AUTOWIDTH for applet list 
Many other appletw don't - they unconditionally use get_terminal_wodth(),
and here the amount of code saved by FEATURE_AUTOWIDTH=n is tiny.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 10:52:24 +01:00
Denys Vlasenko
0fd9fb4244 top: FEATURE_USE_TERMIOS shouldn't control reading of screen size 
It controls whether we take input.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 10:50:08 +01:00
Denys Vlasenko
c5891fe1af more: hardcode FEATURE_USE_TERMIOS=y in this applet; code shrink 
function                                             old     new   delta
get_wh                                                 -      27     +27
tcsetattr_tty_TCSANOW                                  -      18     +18
gotsig                                                35      27      -8
more_main                                            835     759     -76
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/2 up/down: 45/-84)            Total: -39 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-11 10:38:52 +01:00
Denys Vlasenko
80f806cac9 hush: shorten output of "help" builtin 
text	   data	    bss	    dec	    hex	filename
 891272	    485	   6856	 898613	  db635	busybox_old
 891232	    485	   6856	 898573	  db60d	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-10 16:51:10 +01:00
Denys Vlasenko
a1184af5f8 hush: reorder builtins (cd and pwd ought to be close, etc), no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-10 15:58:02 +01:00
Denys Vlasenko
f35ad3bd12 init: rename FEATURE_EXTRA_QUIET -> FEATURE_INIT_QUIET 
The former name had no INIT anywhere in its name, sounded generic

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-10 15:24:13 +01:00
Denys Vlasenko
2b4c258e74 ash: revert "make dot command search current directory first" 
Reverts this:
    commit 8ad78e1ec7
    Author: Denis Vlasenko <vda.linux@googlemail.com>
    Date:   Sun Feb 15 12:40:30 2009 +0000
    ash: make dot command search current directory first, as bash does.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-10 15:18:38 +01:00