tools: add dl.espressif.com root cert into idf_tools.py

Closes https://github.com/espressif/esp-idf/issues/5842

tools/idf_tools.py

@@ -55,6 +55,8 @@ import shutil
 import functools
 import copy
 from collections import OrderedDict, namedtuple
+import ssl
+import contextlib
 
 try:
     import typing  # noqa: F401
@@ -62,9 +64,11 @@ except ImportError:
     pass
 
 try:
-    from urllib.request import urlretrieve
+    from urllib.parse import splittype
+    from urllib.request import urlopen
+    from urllib.error import ContentTooShortError
 except ImportError:
-    from urllib import urlretrieve
+    from urllib import urlopen, splittype, ContentTooShortError
 
 try:
     from exceptions import WindowsError
@@ -139,6 +143,40 @@ CURRENT_PLATFORM = PLATFORM_FROM_NAME.get(PYTHON_PLATFORM, UNKNOWN_PLATFORM)
 EXPORT_SHELL = 'shell'
 EXPORT_KEY_VALUE = 'key-value'
 
+ISRG_X1_ROOT_CERT = """
+-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----
+"""
+
 
 global_quiet = False
 global_non_interactive = False
@@ -265,6 +303,49 @@ def unpack(filename, destination):
     archive_obj.extractall(destination)
 
 
+# An alternative version of urlretrieve which takes SSL context as an argument
+def urlretrieve_ctx(url, filename, reporthook=None, data=None, context=None):
+    url_type, path = splittype(url)
+
+    with contextlib.closing(urlopen(url, data, context=context)) as fp:
+        headers = fp.info()
+
+        # Just return the local path and the "headers" for file://
+        # URLs. No sense in performing a copy unless requested.
+        if url_type == "file" and not filename:
+            return os.path.normpath(path), headers
+
+        # Handle temporary file setup.
+        tfp = open(filename, 'wb')
+
+        with tfp:
+            result = filename, headers
+            bs = 1024 * 8
+            size = int(headers.get("content-length", -1))
+            read = 0
+            blocknum = 0
+
+            if reporthook:
+                reporthook(blocknum, bs, size)
+
+            while True:
+                block = fp.read(bs)
+                if not block:
+                    break
+                read += len(block)
+                tfp.write(block)
+                blocknum += 1
+                if reporthook:
+                    reporthook(blocknum, bs, size)
+
+    if size >= 0 and read < size:
+        raise ContentTooShortError(
+            "retrieval incomplete: got only %i out of %i bytes"
+            % (read, size), result)
+
+    return result
+
+
 # Sometimes renaming a directory on Windows (randomly?) causes a PermissionError.
 # This is confirmed to be a workaround:
 # https://github.com/espressif/esp-idf/issues/3819#issuecomment-515167118
@@ -580,7 +661,14 @@ class IDFTool(object):
             local_temp_path = local_path + '.tmp'
             info('Downloading {} to {}'.format(archive_name, local_temp_path))
             try:
-                urlretrieve(url, local_temp_path, report_progress if not global_non_interactive else None)
+                ctx = None
+                # For dl.espressif.com, add the ISRG x1 root certificate.
+                # This works around the issue with outdated certificate stores in some installations.
+                if "dl.espressif.com" in url:
+                    ctx = ssl.create_default_context()
+                    ctx.load_verify_locations(cadata=ISRG_X1_ROOT_CERT)
+
+                urlretrieve_ctx(url, local_temp_path, report_progress if not global_non_interactive else None, context=ctx)
                 sys.stdout.write("\rDone\n")
             except Exception as e:
                 # urlretrieve could throw different exceptions, e.g. IOError when the server is down