diff --git a/lib/hx509/data/yutaka-pad-broken-ca.pem b/lib/hx509/data/yutaka-pad-broken-ca.pem
new file mode 100644
index 000000000..32685d1fe
--- /dev/null
+++ b/lib/hx509/data/yutaka-pad-broken-ca.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----
+MIICijCCAfOgAwIBAgIJAOSnzE4Qx2H+MA0GCSqGSIb3DQEBBQUAMDkxCzAJBgNV
+BAYTAkpQMRQwEgYDVQQKEwtDQSBURVNUIDEtNDEUMBIGA1UEAxMLQ0EgVEVTVCAx
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+uUSnI1CDZ5402etkCiNXsDy/eYDrF+2KonkIWRrr
+-----END CERTIFICATE-----
diff --git a/lib/hx509/data/yutaka-pad-broken-cert.pem b/lib/hx509/data/yutaka-pad-broken-cert.pem
new file mode 100644
index 000000000..b0726eac1
--- /dev/null
+++ b/lib/hx509/data/yutaka-pad-broken-cert.pem
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
+MIICzTCCAjagAwIBAgIJAOSnzE4Qx2H/MA0GCSqGSIb3DQEBBQUAMDkxCzAJBgNV
+BAYTAkpQMRQwEgYDVQQKEwtDQSBURVNUIDEtNDEUMBIGA1UEAxMLQ0EgVEVTVCAx
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+Y2F0ZTAdBgNVHQ4EFgQUK0DZtd8K1P2ij9gVKUNcHlx7uCIwaQYDVR0jBGIwYIAU
+340JbeYcg6V9zi8aozy48aIhtfihPaQ7MDkxCzAJBgNVBAYTAkpQMRQwEgYDVQQK
+EwtDQSBURVNUIDEtNDEUMBIGA1UEAxMLQ0EgVEVTVCAxLTSCCQDkp8xOEMdh/jAN
+BgkqhkiG9w0BAQUFAAOBgQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAUKJ+eFJYSvXwGF2wxzDXj+x5YCItrHFmrEy4AXXAW+H0NgJVNvqRY/O
+Kw==
+-----END CERTIFICATE-----
diff --git a/lib/hx509/data/yutaka-pad-ok-ca.pem b/lib/hx509/data/yutaka-pad-ok-ca.pem
new file mode 100644
index 000000000..32685d1fe
--- /dev/null
+++ b/lib/hx509/data/yutaka-pad-ok-ca.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----
+MIICijCCAfOgAwIBAgIJAOSnzE4Qx2H+MA0GCSqGSIb3DQEBBQUAMDkxCzAJBgNV
+BAYTAkpQMRQwEgYDVQQKEwtDQSBURVNUIDEtNDEUMBIGA1UEAxMLQ0EgVEVTVCAx
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+MA0GCSqGSIb3DQEBAQUAA4GLADCBhwKBgQDZfFjkPDZeorxWqk7/DKM2d/9Nao28
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+tfgwaQYDVR0jBGIwYIAU340JbeYcg6V9zi8aozy48aIhtfihPaQ7MDkxCzAJBgNV
+BAYTAkpQMRQwEgYDVQQKEwtDQSBURVNUIDEtNDEUMBIGA1UEAxMLQ0EgVEVTVCAx
+LTSCCQDkp8xOEMdh/jAMBgNVHRMEBTADAQH/MA0GCSqGSIb3DQEBBQUAA4GBABsH
+aJ/c/3cGHssi8IvVRci/aavqj607y7l22nKDtG1p4KAjnfNhBMOhRhFv00nJnokK
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+uUSnI1CDZ5402etkCiNXsDy/eYDrF+2KonkIWRrr
+-----END CERTIFICATE-----
diff --git a/lib/hx509/data/yutaka-pad-ok-cert.pem b/lib/hx509/data/yutaka-pad-ok-cert.pem
new file mode 100644
index 000000000..9a89e59e2
--- /dev/null
+++ b/lib/hx509/data/yutaka-pad-ok-cert.pem
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
+MIICzTCCAjagAwIBAgIJAOSnzE4Qx2H/MA0GCSqGSIb3DQEBBQUAMDkxCzAJBgNV
+BAYTAkpQMRQwEgYDVQQKEwtDQSBURVNUIDEtNDEUMBIGA1UEAxMLQ0EgVEVTVCAx
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+340JbeYcg6V9zi8aozy48aIhtfihPaQ7MDkxCzAJBgNVBAYTAkpQMRQwEgYDVQQK
+EwtDQSBURVNUIDEtNDEUMBIGA1UEAxMLQ0EgVEVTVCAxLTSCCQDkp8xOEMdh/jAN
+BgkqhkiG9w0BAQUFAAOBgQCkGhwCDLRwWbDnDFReXkIZ1/9OhfiR8yL1idP9iYVU
+cSoWxSHPBWkv6LORFS03APcXCSzDPJ9pxTjFjGGFSI91fNrzkKdHU/+0WCF2uTh7
+Dz2blqtcmnJqMSn1xHxxfM/9e6M3XwFUMf7SGiKRAbDfsauPafEPTn83vSeKj1lg
+Dw==
+-----END CERTIFICATE-----
diff --git a/lib/hx509/data/yutaka-pad.key b/lib/hx509/data/yutaka-pad.key
new file mode 100644
index 000000000..176362388
--- /dev/null
+++ b/lib/hx509/data/yutaka-pad.key
@@ -0,0 +1,15 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----