Add keyUsage checking for CAs
diff --git a/tests/data_files/test-ca2.ku-crl.crt b/tests/data_files/test-ca2.ku-crl.crt
new file mode 100644
index 0000000..4fb4083
--- /dev/null
+++ b/tests/data_files/test-ca2.ku-crl.crt
@@ -0,0 +1,12 @@
+-----BEGIN CERTIFICATE-----
+MIIBzDCCAVOgAwIBAgIJAP6mZLzh0IPSMAoGCCqGSM49BAMCMD4xCzAJBgNVBAYT
+Ak5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBF
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+m2D4QKSJELUhTHr4zdkeqbzgui0y3iouaoyWsKvetNg=
+-----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca2.ku-crt.crt b/tests/data_files/test-ca2.ku-crt.crt
new file mode 100644
index 0000000..edacc64
--- /dev/null
+++ b/tests/data_files/test-ca2.ku-crt.crt
@@ -0,0 +1,12 @@
+-----BEGIN CERTIFICATE-----
+MIIBzTCCAVOgAwIBAgIJAODh6PAeD9/vMAoGCCqGSM49BAMCMD4xCzAJBgNVBAYT
+Ak5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBF
+QyBDQTAeFw0xNDA0MDkxMTIzNTRaFw0yNDA0MDYxMTIzNTRaMD4xCzAJBgNVBAYT
+Ak5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBF
+QyBDQTB2MBAGByqGSM49AgEGBSuBBAAiA2IABMPaKzRBN1gvh1b+/Im6KUNLTuBu
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+aY7zQa0pw7RfdadHb9UZKVVpmlM7ILRmFmAzHqMdMBswDAYDVR0TBAUwAwEB/zAL
+BgNVHQ8EBAMCAgQwCgYIKoZIzj0EAwIDaAAwZQIwGGlbynd1jU3WkUx6Irhk9Lob
+z2B+1eIO6+eu3En8B3rh8Ipfxo0e0hpfaRFYP1MUAjEAjxxBchRWJAzZ6/47Wg/7
+UoasRINgP5B/uJhTnftS1bqyuWHastb4LW5/YLOvPbMQ
+-----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca2.ku-crt_crl.crt b/tests/data_files/test-ca2.ku-crt_crl.crt
new file mode 100644
index 0000000..ac74e40
--- /dev/null
+++ b/tests/data_files/test-ca2.ku-crt_crl.crt
@@ -0,0 +1,12 @@
+-----BEGIN CERTIFICATE-----
+MIIBzDCCAVOgAwIBAgIJAPejOupCJS65MAoGCCqGSM49BAMCMD4xCzAJBgNVBAYT
+Ak5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBF
+QyBDQTAeFw0xNDA0MDkxMTIyMjVaFw0yNDA0MDYxMTIyMjVaMD4xCzAJBgNVBAYT
+Ak5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBF
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+gaR5sUnnw33NA9j1ercem3asCYz6a8T0zo8/rR33XVU=
+-----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca2.ku-ds.crt b/tests/data_files/test-ca2.ku-ds.crt
new file mode 100644
index 0000000..c28e17b
--- /dev/null
+++ b/tests/data_files/test-ca2.ku-ds.crt
@@ -0,0 +1,12 @@
+-----BEGIN CERTIFICATE-----
+MIIBzDCCAVOgAwIBAgIJAPOkPR3wsvm5MAoGCCqGSM49BAMCMD4xCzAJBgNVBAYT
+Ak5MMREwDwYDVQQKEwhQb2xhclNTTDEcMBoGA1UEAxMTUG9sYXJzc2wgVGVzdCBF
+QyBDQTAeFw0xNDA0MDkxMTI0MTNaFw0yNDA0MDYxMTI0MTNaMD4xCzAJBgNVBAYT
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+QyBDQTB2MBAGByqGSM49AgEGBSuBBAAiA2IABMPaKzRBN1gvh1b+/Im6KUNLTuBu
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+nQdac59ev+lH+ju6wET3jNDjUthUPrdgqa54+UWQ5r4=
+-----END CERTIFICATE-----