From 0dc3a77f41f4544e4cb5a41637af7693410d4cdf Mon Sep 17 00:00:00 2001 From: "Jason Zions (MSFT)" Date: Tue, 26 Mar 2019 18:53:50 +0000 Subject: Azure: Ensure platform random_seed is always serializable as JSON. The Azure platform surfaces random bytes into /sys via Hyper-V. Python 2.7 json.dump() raises an exception if asked to convert a str with non-character content, and python 3.0 json.dump() won't serialize a "bytes" value. As a result, c-i instance data is often not written by Azure, making reboots slower (c-i has to repeat work). The random data is base64-encoded and then decoded into a string (str or unicode depending on the version of Python in use). The base64 string has just as many bits of entropy, so we're not throwing away useful "information", but we can be certain json.dump() will correctly serialize the bits. --- tests/data/azure/non_unicode_random_string | 1 + 1 file changed, 1 insertion(+) create mode 100644 tests/data/azure/non_unicode_random_string (limited to 'tests/data/azure') diff --git a/tests/data/azure/non_unicode_random_string b/tests/data/azure/non_unicode_random_string new file mode 100644 index 00000000..b9ecefb9 --- /dev/null +++ b/tests/data/azure/non_unicode_random_string @@ -0,0 +1 @@ +OEM0d\x00\x00\x00\x01\x80VRTUALMICROSFT\x02\x17\x00\x06MSFT\x97\x00\x00\x00C\xb4{V\xf4X%\x061x\x90\x1c\xfen\x86\xbf~\xf5\x8c\x94&\x88\xed\x84\xf9B\xbd\xd3\xf1\xdb\xee:\xd9\x0fc\x0e\x83(\xbd\xe3'\xfc\x85,\xdf\xf4\x13\x99N\xc5\xf3Y\x1e\xe3\x0b\xa4H\x08J\xb9\xdcdb$ \ No newline at end of file -- cgit v1.2.3