Author Archives: yuliang

touchall script

Posted on 2019-12-22 by yuliang

the touch command under is useful, but not found under windows system. So just write one by hand: The critical API is SetFileTime. SetFileTime(h, file_time, file_time, file_time); This touchall script find all dirs and files under specify path recursively. and … Continue reading →

Posted in Others | Tagged SetFileTime, touch, windows | Comments Off

an inconceivable bug of STM32CubeMX….

Posted on 2018-08-01 by yuliang

The default value of Heap and Stack in STM32CubeMX is 0x200 bytes Heap and 0x400 bytes Stack. Which is work fine in most situation. BUT the middleware of USBStack use malloc! for TX and RX buffer!!! That will make the … Continue reading →

Posted in Memo | Tagged bug, heap, malloc, stm32, usb | Comments Off

Disable Chrome PDF plugin

Posted on 2017-11-21 by yuliang

For the old chrome version, goto chrome://plugin and disable it. But when I upgrade to 62, missing this. And I found chrome://settings/content/pdfDocuments Or find by click I found https://superuser.com/questions/30850/stop-pdfs-from-displaying-inside-google-chrome finally:)

Posted in Memo | Tagged chrome, disable, pdf, plugin | Comments Off

STM32F103 marking summary

Posted on 2017-06-12 by yuliang

This is collection I got. and compare with PCN-8363-2014.03.31.pdf PCN-8390-2014.05.07.pdf PCN-9484-2015.12.17.pdf PCN-9511-2016.04.22.pdf PCN-9685-2016.04.19.pdf


+-----------+-----------+
|STM32F     |STM32F     |
|103CBU6    |103CBU6    |
|9HA10 9U   |99DBX 9U   |
|MYS 342    |MYS 314    |
|ST (e4) 1  |ST (e3) 2  |
+-----------+-----------+-----------+
|STM32      |STM32      |STM32      |
|F103C8T6   |F103C8T6   |F103C8T6   |
|99026 93   |GH21Y 93   |GH265 9U   |
|MYS 346    |CHN 611    |CHN 712    |
|ST (e4) X  |ST (e3) X  |ST (e3)    |
+-----------+-----------+-----------+
|STM32F103  |STM32F103  |STM32F103  |
|RCT6       |RCT6       |RET6       |
|GH22H 93   |GH20W 9U   |GH22R 9U   |
|CHN GH 609 |CHN GH 117 |CHN GH 220 |
|    ST (?) |    ST (?) |    ST (?) |
+-----------+-----------+-----------+
|STM32F107  |
|VCT6    Z  |
|991KG 93   |
|MYS 99 544 |
| ST (e4)ARM|
+-----------+-----------+-----------+
|STM32F103  |STM32F103  |STM32F103  |
|VCT6    X  |VET6    Y  |VET6    Y  |
|HPABN 93   |HPABV 93   |HPAAP 93   |
|KOR HP 421 |KOR HP 229 |KOR HP 324 |
|ST (e4)ARM |ST (e4)ARM |ST (e4)ARM |
+-----------+-----------+-----------+

+-----------+-----------+

|STM32F |STM32F |

|103CBU6 |103CBU6 |

|9HA10 9U |99DBX 9U |

|MYS 342 |MYS 314 |

|ST (e4) 1 |ST (e3) 2 |

+-----------+-----------+-----------+

|STM32 |STM32 |STM32 |

|F103C8T6 |F103C8T6 |F103C8T6 |

|99026 93 |GH21Y 93 |GH265 9U |

|MYS 346 |CHN 611 |CHN 712 |

|ST (e4) X |ST (e3) X |ST (e3) |

+-----------+-----------+-----------+

|STM32F103 |STM32F103 |STM32F103 |

|RCT6 |RCT6 |RET6 |

|GH22H 93 |GH20W 9U |GH22R 9U |

|CHN GH 609 |CHN GH 117 |CHN GH 220 |

| ST (?) | ST (?) | ST (?) |

+-----------+-----------+-----------+

|STM32F107 |

|VCT6 Z |

|991KG 93 |

|MYS 99 544 |

| ST (e4)ARM|

+-----------+-----------+-----------+

|STM32F103 |STM32F103 |STM32F103 |

|VCT6 X |VET6 Y |VET6 Y |

|HPABN 93 |HPABV 93 |HPAAP 93 |

|KOR HP 421 |KOR HP 229 |KOR HP 324 |

|ST (e4)ARM |ST (e4)ARM |ST (e4)ARM |

+-----------+-----------+-----------+

Assembly Plant


|9HA10 9U   |99DBX 9U   |GH22H 93   |
 ^^          ^^          ^^

- HP: Korea
- GH: STATS ChipPAC Shanghai China
- 9H: ST Muar Malaysia
- 7B: Amkor Philippines
- 99: ST Muar Malaysia

|9HA10 9U |99DBX 9U |GH22H 93 |

^^ ^^ ^^

- HP: Korea

- GH: STATS ChipPAC Shanghai China

- 9H: ST Muar Malaysia

- 7B: Amkor Philippines

- 99: ST Muar Malaysia

Country of Origin


|MYS 342    |MYS 314    |CHN GH 609 |
 ^^^         ^^^         ^^^

- KOR: Korea
- CHN: STATS ChipPAC Shanghai China
- MYS: ST Muar Malaysia
- PHL: Amkor Philippines

|MYS 342 |MYS 314 |CHN GH 609 |

^^^ ^^^ ^^^

- KOR: Korea

- CHN: STATS ChipPAC Shanghai China

- MYS: ST Muar Malaysia

- PHL: Amkor Philippines

Manufactured date The problem is, howto identify 2003 or 2013?


|MYS 342    |MYS 314    |CHN GH 609 |
     ^--         ^--            ^-- 

- `^`: year last digit
- `__`: week

|MYS 342 |MYS 314 |CHN GH 609 |

^-- ^-- ^--

- `^`: year last digit

- `__`: week

Interconnect


|ST (e4) 1  |ST (e3) 2  |    ST (.) |
     ^           ^

- e4: Rough Ni Pd AgAu
- e3: Pure Tin

|ST (e4) 1 |ST (e3) 2 | ST (.) |

^ ^

- e4: Rough Ni Pd AgAu

- e3: Pure Tin

Chip revision


|ST (e4) 1  |ST (e3) 2  |    ST (.) |
         ^           ^
A,B,Z,1,2,3,X,Y

|ST (e4) 1 |ST (e3) 2 | ST (.) |

^ ^

A,B,Z,1,2,3,X,Y

Posted in Memo | Tagged f103, marking, package, st, stm32 | Comments Off

Bug in Python3.6 standard library when compile using MinGW

Posted on 2017-04-20 by yuliang

Python36 is compiled by Visual Studio 2015 or MSBuild tools 2015, which included Compiler v19.00 (MSC_VER 1600). But “C:\Python36\Lib\distutils\cygwinccompiler.py” can’t handle it… I modify it simply like this:


        elif msc_ver == '1500':
            # VS2008 / MSVC 9.0
            return ['msvcr90']
        elif msc_ver == '1600':
            # VS2010 / MSVC 14.0 --- it is MSVC 10.0 not 14!
            return ['msvcr100']
        //I added it
        elif msc_ver == '1900':
            # VS2015 / MSVC 14.0
            return []

elif msc_ver == '1500':

# VS2008 / MSVC 9.0

return ['msvcr90']

elif msc_ver == '1600':

# VS2010 / MSVC 14.0 --- it is MSVC 10.0 not 14!

return ['msvcr100']

//I added it

elif msc_ver == '1900':

# VS2015 / MSVC 14.0

return []

Posted in Memo | Tagged 2015, bug, mingw32, MSVC14, python, python36, studio, visual | Comments Off

USB3.0 Hub

Posted on 2017-02-28 by yuliang

I bought some USB3.0 hub, and look inside:) Unitek Y-3043CBK, RTS5411, transfer stable and look pretty. This chip have EFuse ROM, so external SPI Flash is useless.

Posted in Memo | Tagged GL3520, HUB, RTS5401, USB3.0, VL812, VL813 | Comments Off

Xilinx update Spartan3AN device!

Posted on 2017-01-02 by yuliang

I found the release date of some XC3S50AN is 2014 or 2016! and Impact can’t download to In-System Flash, show me “SPI not found”… But the older 2010’s IC is OK. After some searching… Xilinx manufacturing Spartan3AN devices, not discontinued! … Continue reading →

Posted in Memo | Tagged spartan3an, xc3s50an, xilinx | Comments Off

Dump PE file

Posted on 2017-01-01 by yuliang

I am using some tool to check a PE file (dll or exe) depends, most free tool support 32bits file. So I decided to write an tool support 32bits and 64bits PE file. The PE struct is defined in MinGW’s … Continue reading →

Posted in Writing | Tagged DLL, exe, PE, pedump, windows | Comments Off

Remove unnecessary php file please

Posted on 2016-12-22 by yuliang

When I analysis web server log file, I found this


xxx.xxx.xxx.xxx ...... GET /wp-config ......
xxx.xxx.xxx.xxx ...... GET /wp-config.phpOLD ......
xxx.xxx.xxx.xxx ...... GET /wp-config.txt ......
xxx.xxx.xxx.xxx ...... GET /wp-config.old ......
xxx.xxx.xxx.xxx ...... GET /wp-config.php~ ......
xxx.xxx.xxx.xxx ...... GET /wp-config.php~~ ......
xxx.xxx.xxx.xxx ...... GET /wp-config.php~~~ ......
xxx.xxx.xxx.xxx ...... GET /wp-config-backup.txt ......
xxx.xxx.xxx.xxx ...... GET /config.old ......
xxx.xxx.xxx.xxx ...... GET /wp-config.phpb ......
xxx.xxx.xxx.xxx ...... GET /wp-config.phpc ......

xxx.xxx.xxx.xxx ...... GET /wp-config ......

xxx.xxx.xxx.xxx ...... GET /wp-config.phpOLD ......

xxx.xxx.xxx.xxx ...... GET /wp-config.txt ......

xxx.xxx.xxx.xxx ...... GET /wp-config.old ......

xxx.xxx.xxx.xxx ...... GET /wp-config.php~ ......

xxx.xxx.xxx.xxx ...... GET /wp-config.php~~ ......

xxx.xxx.xxx.xxx ...... GET /wp-config.php~~~ ......

xxx.xxx.xxx.xxx ...... GET /wp-config-backup.txt ......

xxx.xxx.xxx.xxx ...... GET /config.old ......

xxx.xxx.xxx.xxx ...... GET /wp-config.phpb ......

xxx.xxx.xxx.xxx ...... GET /wp-config.phpc ......

That means someone checking my files, and want to get the MySQL password? It is better to prevent this location in web server!

Posted in Memo | Tagged apache, nginx, prevent, thief, wordpress | Comments Off

the format of openssh public key

Posted on 2016-12-18 by yuliang

The openssh public key is like this :


ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAACEAqkhDARXD9+4Gx+FezTAtOEjNDaYWCTdoeMuPFultmos= rsa-key-20161218

ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAACEAqkhDARXD9+4Gx+FezTAtOEjNDaYWCTdoeMuPFultmos= rsa-key-20161218

using openssl to decode it:


$ openssl rsa -in _rsa_256bits -text -noout
Private-Key: (256 bit)
modulus:
    00:aa:48:43:01:15:c3:f7:ee:06:c7:e1:5e:cd:30:
    2d:38:48:cd:0d:a6:16:09:37:68:78:cb:8f:16:e9:
    6d:9a:8b
publicExponent: 37 (0x25)
privateExponent:
    00:9c:79:c1:07:ea:7c:ba:50:59:42:0d:5e:08:a8:
    cf:9a:01:6b:c0:c2:02:77:4b:75:c6:00:b5:d1:a8:
    ba:9a:2d
prime1:
    00:d3:68:1b:a7:2a:31:bc:60:67:ff:5e:36:b6:5a:
    aa:ab
prime2:
    00:ce:33:73:0d:ac:ec:3f:80:5e:f8:98:30:bf:38:
    cf:a1
exponent1:
    00:bc:8d:49:18:8d:6a:a1:17:b6:b3:54:07:48:b1:
    ba:cf
exponent2:
    00:96:78:92:3a:69:6e:20:80:45:4d:9f:7d:84:9f:
    14:0d
coefficient:
    00:be:63:49:6d:c0:ff:1d:4a:04:2c:ac:b7:73:04:
    47:4e

$ openssl rsa -in _rsa_256bits -text -noout

Private-Key: (256 bit)

modulus:

00:aa:48:43:01:15:c3:f7:ee:06:c7:e1:5e:cd:30:

2d:38:48:cd:0d:a6:16:09:37:68:78:cb:8f:16:e9:

6d:9a:8b

publicExponent: 37 (0x25)

privateExponent:

00:9c:79:c1:07:ea:7c:ba:50:59:42:0d:5e:08:a8:

cf:9a:01:6b:c0:c2:02:77:4b:75:c6:00:b5:d1:a8:

ba:9a:2d

prime1:

00:d3:68:1b:a7:2a:31:bc:60:67:ff:5e:36:b6:5a:

aa:ab

prime2:

00:ce:33:73:0d:ac:ec:3f:80:5e:f8:98:30:bf:38:

cf:a1

exponent1:

00:bc:8d:49:18:8d:6a:a1:17:b6:b3:54:07:48:b1:

ba:cf

exponent2:

00:96:78:92:3a:69:6e:20:80:45:4d:9f:7d:84:9f:

14:0d

coefficient:

00:be:63:49:6d:c0:ff:1d:4a:04:2c:ac:b7:73:04:

47:4e

And I write a python script to decode it, and found the format like this:


|uint32_t nr_bytes|uint8_t name|
|uint32_t nr_bytes|uint8_t n|
|uint32_t nr_bytes|uint8_t e|

|uint32_t nr_bytes|uint8_t name|

|uint32_t nr_bytes|uint8_t n|

|uint32_t nr_bytes|uint8_t e|

The sample python code:

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#
#                   GNU GENERAL PUBLIC LICENSE
#                       Version 2, June 1991
# 
# This program 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, or (at your option)
# any later version.
# 
# This program 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; see the file COPYING.  If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
#
#
import sys
import os
import re
import getopt
import glob
import base64
import codecs
import hashlib

def file_get_contents(fn):
    f = open(fn, encoding='UTF-8')
    d = f.read()
    f.close()
    return d

def bin2hex(raw):
    hexval = codecs.encode(raw, 'hex')
    l = []
    for i in range(0, len(hexval), 2):
        l.append(hexval[i:i+2].decode('UTF-8'))
    return ':'.join(l)

def bin2b64(raw):
    s = base64.b64encode(raw)
    s = s.decode('UTF-8').replace('=','')
    return s

def parse_pubkey(raw):
    l = []
    n = len(raw)

    offs = 0
    while offs < n:
        nr_chars = (raw[offs+0] << 24) | \
                (raw[offs+1] << 16) | \
                (raw[offs+2] << 8) | \
                raw[offs+3]
        offs    = offs + 4
        l.append(raw[offs:offs+nr_chars])
        offs    = offs + nr_chars

    return l


if __name__ == '__main__':
    fn = sys.argv[1]

    text = file_get_contents(fn)
    records = re.split(r'\s+', text.splitlines()[0])

    if records[0] != 'ssh-rsa':
        print('Error: not openssh public key, which startswith "ssh-key"')
        print(text)
        sys.exit(-1)
    
    pubkey = base64.b64decode(records[1])
    l = parse_pubkey(pubkey)

    bits = (len(l[2]) - 1) * 8

    print('# %s:' % fn)
    print('string:', l[0])
    print('e(hex):', bin2hex(l[1]))
    print('n(hex):', bin2hex(l[2]))

    print('$ ssh-keygen -l -E md5 -f %s' % fn)
    print('$ head -n 1 %s | gawk "{print $2}" | base64 -d | md5sum' % fn)
    print('%d MD5:%s'     % (bits, bin2hex(hashlib.md5(pubkey).digest())))
    print('')
    print('$ ssh-keygen -l -E sha1 -f %s' % fn)
    print('$ head -n 1 %s | gawk "{print $2}" | base64 -d | sha1sum' % fn)
    print('%d SHA1:%s'    % (bits, bin2b64(hashlib.sha1(pubkey).digest())))
    print('')
    print('$ ssh-keygen -l -E sha256 -f %s' % fn)
    print('$ head -n 1 %s | gawk "{print $2}" | base64 -d | sha256sum' % fn)
    print('%d SHA256:%s'  % (bits, bin2b64(hashlib.sha256(pubkey).digest())))
    print('')

#!/usr/bin/env python

# -*- coding:utf-8 -*-

# GNU GENERAL PUBLIC LICENSE

# Version 2, June 1991

# This program 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, or (at your option)

# any later version.

# This program 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; see the file COPYING. If not, write to

# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

import sys

import os

import re

import getopt

import glob

import base64

import codecs

import hashlib

def file_get_contents(fn):

f = open(fn, encoding='UTF-8')

d = f.read()

f.close()

return d

def bin2hex(raw):

hexval = codecs.encode(raw, 'hex')

l = []

for i in range(0, len(hexval), 2):

l.append(hexval[i:i+2].decode('UTF-8'))

return ':'.join(l)

def bin2b64(raw):

s = base64.b64encode(raw)

s = s.decode('UTF-8').replace('=','')

return s

def parse_pubkey(raw):

l = []

n = len(raw)

offs = 0

while offs < n:

nr_chars = (raw[offs+0] << 24) | \

(raw[offs+1] << 16) | \

(raw[offs+2] << 8) | \

raw[offs+3]

offs = offs + 4

l.append(raw[offs:offs+nr_chars])

offs = offs + nr_chars

return l

if __name__ == '__main__':

fn = sys.argv[1]

text = file_get_contents(fn)

records = re.split(r'\s+', text.splitlines()[0])

if records[0] != 'ssh-rsa':

print('Error: not openssh public key, which startswith "ssh-key"')

print(text)

sys.exit(-1)

pubkey = base64.b64decode(records[1])

l = parse_pubkey(pubkey)

bits = (len(l[2]) - 1) * 8

print('# %s:' % fn)

print('string:', l[0])

print('e(hex):', bin2hex(l[1]))

print('n(hex):', bin2hex(l[2]))

print('$ ssh-keygen -l -E md5 -f %s' % fn)

print('$ head -n 1 %s | gawk "{print $2}" | base64 -d | md5sum' % fn)

print('%d MD5:%s' % (bits, bin2hex(hashlib.md5(pubkey).digest())))

print('')

print('$ ssh-keygen -l -E sha1 -f %s' % fn)

print('$ head -n 1 %s | gawk "{print $2}" | base64 -d | sha1sum' % fn)

print('%d SHA1:%s' % (bits, bin2b64(hashlib.sha1(pubkey).digest())))

print('')

print('$ ssh-keygen -l -E sha256 -f %s' % fn)

print('$ head -n 1 %s | gawk "{print $2}" | base64 -d | sha256sum' % fn)

print('%d SHA256:%s' % (bits, bin2b64(hashlib.sha256(pubkey).digest())))

print('')

Posted in Writing | Tagged key, openssh, Openssl, public, signa | Comments Off

Author Archives: yuliang

touchall script

an inconceivable bug of STM32CubeMX….

Disable Chrome PDF plugin

STM32F103 marking summary

Bug in Python3.6 standard library when compile using MinGW

USB3.0 Hub

Xilinx update Spartan3AN device!

Dump PE file

Remove unnecessary php file please

the format of openssh public key

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