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From f73d2460e5ad205a1cd2d74a73c2d1308265d9f9 Mon Sep 17 00:00:00 2001
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From: Miroslav Rezanina <mrezanin@redhat.com>
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Date: Wed, 18 May 2022 05:23:48 -0400
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Subject: [PATCH] Add \r\n check for SSH keys in Azure (#889)
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RH-Author: Miroslav Rezanina <mrezanin@redhat.com>
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RH-MergeRequest: 64: Properly handle \r\n in SSH keys in Azure
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RH-Commit: [1/1] c0868258fd63f6c531acd8da81e0494a8412d5ea (mrezanin/src_rhel_cloud-init)
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RH-Bugzilla: 2088028
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RH-Acked-by: xiachen <xiachen@redhat.com>
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RH-Acked-by: Eduardo Otubo <otubo@redhat.com>
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RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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See https://bugs.launchpad.net/cloud-init/+bug/1910835
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(cherry picked from commit f17f78fa9d28e62793a5f2c7109fc29eeffb0c89)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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cloudinit/sources/DataSourceAzure.py | 3 +++
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tests/unittests/test_datasource/test_azure.py | 12 ++++++++++++
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2 files changed, 15 insertions(+)
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diff --git a/cloudinit/sources/DataSourceAzure.py b/cloudinit/sources/DataSourceAzure.py
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index a66f023d..247284ad 100755
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--- a/cloudinit/sources/DataSourceAzure.py
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+++ b/cloudinit/sources/DataSourceAzure.py
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@@ -1551,6 +1551,9 @@ def _key_is_openssh_formatted(key):
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"""
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Validate whether or not the key is OpenSSH-formatted.
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"""
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+ # See https://bugs.launchpad.net/cloud-init/+bug/1910835
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+ if '\r\n' in key.strip():
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+ return False
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parser = ssh_util.AuthKeyLineParser()
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try:
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diff --git a/tests/unittests/test_datasource/test_azure.py b/tests/unittests/test_datasource/test_azure.py
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index f8433690..742d1faa 100644
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--- a/tests/unittests/test_datasource/test_azure.py
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+++ b/tests/unittests/test_datasource/test_azure.py
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@@ -1764,6 +1764,18 @@ scbus-1 on xpt0 bus 0
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self.assertEqual(ssh_keys, ["ssh-rsa key1"])
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self.assertEqual(m_parse_certificates.call_count, 0)
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+ def test_key_without_crlf_valid(self):
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+ test_key = 'ssh-rsa somerandomkeystuff some comment'
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+ assert True is dsaz._key_is_openssh_formatted(test_key)
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+
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+ def test_key_with_crlf_invalid(self):
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+ test_key = 'ssh-rsa someran\r\ndomkeystuff some comment'
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+ assert False is dsaz._key_is_openssh_formatted(test_key)
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+
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+ def test_key_endswith_crlf_valid(self):
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+ test_key = 'ssh-rsa somerandomkeystuff some comment\r\n'
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+ assert True is dsaz._key_is_openssh_formatted(test_key)
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+
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@mock.patch(
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'cloudinit.sources.helpers.azure.OpenSSLManager.parse_certificates')
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@mock.patch(MOCKPATH + 'get_metadata_from_imds')
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--
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2.31.1
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