azure: Filter list of ssh keys pulled from fabric

The Azure data source is expected to expose a list of
ssh keys for the user-to-be-provisioned in the crawled
metadata. When configured to use the __builtin__ agent
this list is built by the WALinuxAgentShim. The shim
retrieves the full set of certificates and public keys
exposed to the VM from the wireserver, extracts any
ssh keys it can, and returns that list.

This fix reduces that list of ssh keys to just the
ones whose fingerprints appear in the "administrative
user" section of the ovf-env.xml file. The Azure
control plane exposes other ssh keys to the VM for
other reasons, but those should not be added to the
authorized_keys file for the provisioned user.

4 files changed, 170 insertions, 0 deletions

diff --git a/tests/data/azure/parse_certificates_fingerprints b/tests/data/azure/parse_certificates_fingerprints
new file mode 100644
index 00000000..f7293c56
--- /dev/null
+++ b/tests/data/azure/parse_certificates_fingerprints
@@ -0,0 +1,4 @@
+ECEDEB3B8488D31AF3BC4CCED493F64B7D27D7B1
+073E19D14D1C799224C6A0FD8DDAB6A8BF27D473
+4C16E7FAD6297D74A9B25EB8F0A12808CEBE293E
+929130695289B450FE45DCD5F6EF0CDE69865867
diff --git a/tests/data/azure/parse_certificates_pem b/tests/data/azure/parse_certificates_pem
new file mode 100644
index 00000000..3521ea3a
--- /dev/null
+++ b/tests/data/azure/parse_certificates_pem
@@ -0,0 +1,152 @@
+Bag Attributes
+    localKeyID: 01 00 00 00
+    Microsoft CSP Name: Microsoft Enhanced Cryptographic Provider v1.0
+Key Attributes
+    X509v3 Key Usage: 10
+-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----
+Bag Attributes
+    localKeyID: 02 00 00 00
+    Microsoft CSP Name: Microsoft Strong Cryptographic Provider
+Key Attributes
+    X509v3 Key Usage: 10
+-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----
+Bag Attributes: <Empty Attributes>
+subject=/CN=CRP/OU=AzureRT/O=Microsoft Corporation/L=Redmond/ST=WA/C=US
+issuer=/CN=Root Agency
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+Bag Attributes
+    localKeyID: 01 00 00 00
+subject=/C=US/ST=WASHINGTON/L=Seattle/O=Microsoft/OU=Azure/CN=AnhVo/emailAddress=redacted@microsoft.com
+issuer=/C=US/ST=WASHINGTON/L=Seattle/O=Microsoft/OU=Azure/CN=AnhVo/emailAddress=redacted@microsoft.com
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+Bag Attributes
+    localKeyID: 02 00 00 00
+subject=/CN=/subscriptions/redacted/resourcegroups/redacted/providers/Microsoft.Compute/virtualMachines/redacted
+issuer=/CN=Microsoft.ManagedIdentity
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+Bag Attributes: <Empty Attributes>
+subject=/CN=CRP/OU=AzureRT/O=Microsoft Corporation/L=Redmond/ST=WA/C=US
+issuer=/CN=Root Agency
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/tests/data/azure/pubkey_extract_cert b/tests/data/azure/pubkey_extract_cert
new file mode 100644
index 00000000..ce9b852d
--- /dev/null
+++ b/tests/data/azure/pubkey_extract_cert
@@ -0,0 +1,13 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/tests/data/azure/pubkey_extract_ssh_key b/tests/data/azure/pubkey_extract_ssh_key
new file mode 100644
index 00000000..54d749ed
--- /dev/null
+++ b/tests/data/azure/pubkey_extract_ssh_key
@@ -0,0 +1 @@
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