Arduino-esp32: get.py produces SSL certificate verification error

[DrewHoyt]

Hardware: N/A

Board: esp32 dev board
Core Installation/update date: 7/jan/2018
IDE name: Arduino IDE
Flash Frequency: N/A
Upload Speed: N/A

Description:

attempting to get tools set up for use with the Arduino IDE. When I run get.py I receive the following error:

IOError: [Errno socket error] [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661)

Looks to me like there is there is something up with the SSL certificate?

detailed traceback:

[user@localhost tools]$ python get.py
System: Linux, Info: Linux-4.14.11-300.fc27.x86_64-x86_64-with-fedora-27-Twenty_Seven
Platform: x86_64-pc-linux-gnu
Downloading xtensa-esp32-elf-linux64-1.22.0-75-gbaf03c2-5.2.0.tar.gz
Traceback (most recent call last):
  File "get.py", line 139, in <module>
    get_tool(tool)
  File "get.py", line 94, in get_tool
    urlretrieve(url, local_path, report_progress)
  File "/usr/lib64/python2.7/urllib.py", line 98, in urlretrieve
    return opener.retrieve(url, filename, reporthook, data)
  File "/usr/lib64/python2.7/urllib.py", line 245, in retrieve
    fp = self.open(url, data)
  File "/usr/lib64/python2.7/urllib.py", line 213, in open
    return getattr(self, name)(url)
  File "/usr/lib64/python2.7/urllib.py", line 443, in open_https
    h.endheaders(data)
  File "/usr/lib64/python2.7/httplib.py", line 1038, in endheaders
    self._send_output(message_body)
  File "/usr/lib64/python2.7/httplib.py", line 882, in _send_output
    self.send(msg)
  File "/usr/lib64/python2.7/httplib.py", line 844, in send
    self.connect()
  File "/usr/lib64/python2.7/httplib.py", line 1263, in connect
    server_hostname=server_hostname)
  File "/usr/lib64/python2.7/ssl.py", line 363, in wrap_socket
    _context=self)
  File "/usr/lib64/python2.7/ssl.py", line 611, in __init__
    self.do_handshake()
  File "/usr/lib64/python2.7/ssl.py", line 840, in do_handshake
    self._sslobj.do_handshake()
IOError: [Errno socket error] [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661)

[DrewHoyt]

Re-ran this week and SSL certificate issue seems to have worked itself out. No changes in my set up, but get.py seems to be functioning properly now.

[WayneKeenan]

still occurs as of today:

urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749)>

Using HomeBrew python3 on macOS:

Python 3.6.0 (v3.6.0:41df79263a11, Dec 22 2016, 17:23:13) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin

And 'official' Python 3.6 (/Library/Frameworks/Python.framework/Versions/3.6/bin/python3)

Python 3.6.0 (v3.6.0:41df79263a11, Dec 22 2016, 17:23:13) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin

[WayneKeenan]

A workaround on mac/linux to JFDI:

Edit line 89 (or thereabouts to display there url instead of the archive_name):

print('Downloading ' + url)

Then, for each download that fails run get -P/dist [the url]`

e.g.:

wget -P ./dist https://github.com/igrr/mkspiffs/releases/download/0.2.2/mkspiffs-0.2.2-arduino-esp32-osx.tar.gz

Then re-run get.py till it's happy.

[StefanHri]

I have the same problem by installing the esp tools. My set up:
1)esp-edf (commit 9f145ff165099f32b92b7ee022a1debc5f0a583d) from Sep. 12. 2019
2)Running install.sh on linux strech causes:
Installing ESP-IDF tools
Installing tools: xtensa-esp32-elf, esp32ulp-elf, openocd-esp32
Installing [email protected]
Downloading xtensa-esp32-elf-gcc8_2_0-esp32-2019r1-linux-amd64.tar.gz to /root/.espressif/dist/xtensa-esp32-elf-gcc8_2_0-esp32-2019r1-linux-amd64.tar.gz.tmp
Traceback (most recent call last):
File "/opt/esp/esp-idf/tools/idf_tools.py", line 1317, in
main(sys.argv[1:])
File "/opt/esp/esp-idf/tools/idf_tools.py", line 1313, in main
action_func(args)
File "/opt/esp/esp-idf/tools/idf_tools.py", line 1107, in action_install
tool_obj.download(tool_version)
File "/opt/esp/esp-idf/tools/idf_tools.py", line 541, in download
urlretrieve(url, local_temp_path, report_progress if not global_non_interactive else None)
File "/usr/lib/python2.7/urllib.py", line 98, in urlretrieve
return opener.retrieve(url, filename, reporthook, data)
File "/usr/lib/python2.7/urllib.py", line 245, in retrieve
fp = self.open(url, data)
File "/usr/lib/python2.7/urllib.py", line 213, in open
return getattr(self, name)(url)
File "/usr/lib/python2.7/urllib.py", line 443, in open_https
h.endheaders(data)
File "/usr/lib/python2.7/httplib.py", line 1038, in endheaders
self._send_output(message_body)
File "/usr/lib/python2.7/httplib.py", line 882, in _send_output
self.send(msg)
File "/usr/lib/python2.7/httplib.py", line 844, in send
self.connect()
File "/usr/lib/python2.7/httplib.py", line 1263, in connect
server_hostname=server_hostname)
File "/usr/lib/python2.7/ssl.py", line 363, in wrap_socket
_context=self)
File "/usr/lib/python2.7/ssl.py", line 611, in __init__
self.do_handshake()
File "/usr/lib/python2.7/ssl.py", line 840, in do_handshake
self._sslobj.do_handshake()
IOError: [Errno socket error] [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661)