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diff --git a/cloudinit/ssh_util.py b/cloudinit/ssh_util.py
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index be8a49e..b95b956 100644
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--- a/cloudinit/ssh_util.py
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+++ b/cloudinit/ssh_util.py
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@@ -22,8 +22,11 @@ DEF_SSHD_CFG = "/etc/ssh/sshd_config"
45ef3b0
 VALID_KEY_TYPES = (
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     "dsa",
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     "ecdsa",
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+    "ecdsa-sha2-nistp256",
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     "ecdsa-sha2-nistp256-cert-v01@openssh.com",
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+    "ecdsa-sha2-nistp384",
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     "ecdsa-sha2-nistp384-cert-v01@openssh.com",
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+    "ecdsa-sha2-nistp521",
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     "ecdsa-sha2-nistp521-cert-v01@openssh.com",
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     "ed25519",
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     "rsa",