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Author Archives: yuliang
an inconceivable bug of STM32CubeMX….
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
Disable Chrome PDF plugin
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:)
STM32F103 marking summary
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
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+-----------+-----------+ |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
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|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
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|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?
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|MYS 342 |MYS 314 |CHN GH 609 | ^-- ^-- ^-- - `^`: year last digit - `__`: week |
Interconnect
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|ST (e4) 1 |ST (e3) 2 | ST (.) | ^ ^ - e4: Rough Ni Pd AgAu - e3: Pure Tin |
Chip revision
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|ST (e4) 1 |ST (e3) 2 | ST (.) | ^ ^ A,B,Z,1,2,3,X,Y |
Bug in Python3.6 standard library when compile using MinGW
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:
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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 [] |
USB3.0 Hub
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.
Xilinx update Spartan3AN device!
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
Dump PE file
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
Remove unnecessary php file please
When I analysis web server log file, I found this
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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!
the format of openssh public key
The openssh public key is like this :
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ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAACEAqkhDARXD9+4Gx+FezTAtOEjNDaYWCTdoeMuPFultmos= rsa-key-20161218 |
using openssl to decode it:
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$ 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:
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|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:
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#!/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('') |
Fix wordpress 301 loop when enable nginx…
I am try to setup Nginx as reverse proxy, backend is Apache, the problem is WordPress always 301 to the same URL even if the browser request that URL (301 loop). client nginx(https) apache(http) The problem is WordPress think the … Continue reading