diff --git a/checker/testdata/e5.pem b/checker/testdata/e5.pem
new file mode 100644
index 0000000..e5b24bc
--- /dev/null
+++ b/checker/testdata/e5.pem
@@ -0,0 +1,26 @@
+-----BEGIN CERTIFICATE-----
+MIIEVzCCAj+gAwIBAgIRAIOPbGPOsTmMYgZigxXJ/d4wDQYJKoZIhvcNAQELBQAw
+TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
+cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMjQwMzEzMDAwMDAw
+WhcNMjcwMzEyMjM1OTU5WjAyMQswCQYDVQQGEwJVUzEWMBQGA1UEChMNTGV0J3Mg
+RW5jcnlwdDELMAkGA1UEAxMCRTUwdjAQBgcqhkjOPQIBBgUrgQQAIgNiAAQNCzqK
+a2GOtu/cX1jnxkJFVKtj9mZhSAouWXW0gQI3ULc/FnncmOyhKJdyIBwsz9V8UiBO
+VHhbhBRrwJCuhezAUUE8Wod/Bk3U/mDR+mwt4X2VEIiiCFQPmRpM5uoKrNijgfgw
+gfUwDgYDVR0PAQH/BAQDAgGGMB0GA1UdJQQWMBQGCCsGAQUFBwMCBggrBgEFBQcD
+ATASBgNVHRMBAf8ECDAGAQH/AgEAMB0GA1UdDgQWBBSfK1/PPCFPnQS37SssxMZw
+i9LXDTAfBgNVHSMEGDAWgBR5tFnme7bl5AFzgAiIyBpY9umbbjAyBggrBgEFBQcB
+AQQmMCQwIgYIKwYBBQUHMAKGFmh0dHA6Ly94MS5pLmxlbmNyLm9yZy8wEwYDVR0g
+BAwwCjAIBgZngQwBAgEwJwYDVR0fBCAwHjAcoBqgGIYWaHR0cDovL3gxLmMubGVu
+Y3Iub3JnLzANBgkqhkiG9w0BAQsFAAOCAgEAH3KdNEVCQdqk0LKyuNImTKdRJY1C
+2uw2SJajuhqkyGPY8C+zzsufZ+mgnhnq1A2KVQOSykOEnUbx1cy637rBAihx97r+
+bcwbZM6sTDIaEriR/PLk6LKs9Be0uoVxgOKDcpG9svD33J+G9Lcfv1K9luDmSTgG
+6XNFIN5vfI5gs/lMPyojEMdIzK9blcl2/1vKxO8WGCcjvsQ1nJ/Pwt8LQZBfOFyV
+XP8ubAp/au3dc4EKWG9MO5zcx1qT9+NXRGdVWxGvmBFRAajciMfXME1ZuGmk3/GO
+koAM7ZkjZmleyokP1LGzmfJcUd9s7eeu1/9/eg5XlXd/55GtYjAM+C4DG5i7eaNq
+cm2F+yxYIPt6cbbtYVNJCGfHWqHEQ4FYStUyFnv8sjyqU8ypgZaNJ9aVcWSICLOI
+E1/Qv/7oKsnZCWJ926wU6RqG1OYPGOi1zuABhLw61cuPVDT28nQS/e6z95cJXq0e
+K1BcaJ6fJZsmbjRgD5p3mvEf5vdQM7MCEvU0tHbsx2I5mHHJoABHb8KVBgWp/lcX
+GWiWaeOyB7RP+OfDtvi2OsapxXiV7vNVs7fMlrRjY1joKaqmmycnBvAq14AEbtyL
+sVfOS66B8apkeFX2NY4XPEYV4ZSCe8VHPrdrERk2wILG3T/EGmSIkCYVUMSnjmJd
+VQD9F6Na/+zmXCc=
+-----END CERTIFICATE-----
diff --git a/checker/testdata/e6.pem b/checker/testdata/e6.pem
new file mode 100644
index 0000000..65797c8
--- /dev/null
+++ b/checker/testdata/e6.pem
@@ -0,0 +1,26 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/e7.pem b/checker/testdata/e7.pem
new file mode 100644
index 0000000..d30d176
--- /dev/null
+++ b/checker/testdata/e7.pem
@@ -0,0 +1,26 @@
+-----BEGIN CERTIFICATE-----
+MIIEVzCCAj+gAwIBAgIRAKp18eYrjwoiCWbTi7/UuqEwDQYJKoZIhvcNAQELBQAw
+TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
+cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMjQwMzEzMDAwMDAw
+WhcNMjcwMzEyMjM1OTU5WjAyMQswCQYDVQQGEwJVUzEWMBQGA1UEChMNTGV0J3Mg
+RW5jcnlwdDELMAkGA1UEAxMCRTcwdjAQBgcqhkjOPQIBBgUrgQQAIgNiAARB6AST
+CFh/vjcwDMCgQer+VtqEkz7JANurZxLP+U9TCeioL6sp5Z8VRvRbYk4P1INBmbef
+QHJFHCxcSjKmwtvGBWpl/9ra8HW0QDsUaJW2qOJqceJ0ZVFT3hbUHifBM/2jgfgw
+gfUwDgYDVR0PAQH/BAQDAgGGMB0GA1UdJQQWMBQGCCsGAQUFBwMCBggrBgEFBQcD
+ATASBgNVHRMBAf8ECDAGAQH/AgEAMB0GA1UdDgQWBBSuSJ7chx1EoG/aouVgdAR4
+wpwAgDAfBgNVHSMEGDAWgBR5tFnme7bl5AFzgAiIyBpY9umbbjAyBggrBgEFBQcB
+AQQmMCQwIgYIKwYBBQUHMAKGFmh0dHA6Ly94MS5pLmxlbmNyLm9yZy8wEwYDVR0g
+BAwwCjAIBgZngQwBAgEwJwYDVR0fBCAwHjAcoBqgGIYWaHR0cDovL3gxLmMubGVu
+Y3Iub3JnLzANBgkqhkiG9w0BAQsFAAOCAgEAjx66fDdLk5ywFn3CzA1w1qfylHUD
+aEf0QZpXcJseddJGSfbUUOvbNR9N/QQ16K1lXl4VFyhmGXDT5Kdfcr0RvIIVrNxF
+h4lqHtRRCP6RBRstqbZ2zURgqakn/Xip0iaQL0IdfHBZr396FgknniRYFckKORPG
+yM3QKnd66gtMst8I5nkRQlAg/Jb+Gc3egIvuGKWboE1G89NTsN9LTDD3PLj0dUMr
+OIuqVjLB8pEC6yk9enrlrqjXQgkLEYhXzq7dLafv5Vkig6Gl0nuuqjqfp0Q1bi1o
+yVNAlXe6aUXw92CcghC9bNsKEO1+M52YY5+ofIXlS/SEQbvVYYBLZ5yeiglV6t3S
+M6H+vTG0aP9YHzLn/KVOHzGQfXDP7qM5tkf+7diZe7o2fw6O7IvN6fsQXEQQj8TJ
+UXJxv2/uJhcuy/tSDgXwHM8Uk34WNbRT7zGTGkQRX0gsbjAea/jYAoWv0ZvQRwpq
+Pe79D/i7Cep8qWnA+7AE/3B3S/3dEEYmc0lpe1366A/6GEgk3ktr9PEoQrLChs6I
+tu3wnNLB2euC8IKGLQFpGtOO/2/hiAKjyajaBP25w1jF0Wl8Bbqne3uZ2q1GyPFJ
+YRmT7/OXpmOH/FVLtwS+8ng1cAmpCujPwteJZNcDG0sF2n/sc0+SQf49fdyUK0ty
++VUwFj9tmWxyR/M=
+-----END CERTIFICATE-----
diff --git a/checker/testdata/e8.pem b/checker/testdata/e8.pem
new file mode 100644
index 0000000..12b583e
--- /dev/null
+++ b/checker/testdata/e8.pem
@@ -0,0 +1,26 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/e9.pem b/checker/testdata/e9.pem
new file mode 100644
index 0000000..054a21c
--- /dev/null
+++ b/checker/testdata/e9.pem
@@ -0,0 +1,26 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/r10.pem b/checker/testdata/r10.pem
new file mode 100644
index 0000000..4bfbe31
--- /dev/null
+++ b/checker/testdata/r10.pem
@@ -0,0 +1,29 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/r11.pem b/checker/testdata/r11.pem
new file mode 100644
index 0000000..d6bdd38
--- /dev/null
+++ b/checker/testdata/r11.pem
@@ -0,0 +1,29 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/r12.pem b/checker/testdata/r12.pem
new file mode 100644
index 0000000..4fd559e
--- /dev/null
+++ b/checker/testdata/r12.pem
@@ -0,0 +1,29 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/r13.pem b/checker/testdata/r13.pem
new file mode 100644
index 0000000..5761df0
--- /dev/null
+++ b/checker/testdata/r13.pem
@@ -0,0 +1,29 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/r14.pem b/checker/testdata/r14.pem
new file mode 100644
index 0000000..ce80eb1
--- /dev/null
+++ b/checker/testdata/r14.pem
@@ -0,0 +1,29 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/stg-e5.pem b/checker/testdata/stg-e5.pem
new file mode 100644
index 0000000..4d86a37
--- /dev/null
+++ b/checker/testdata/stg-e5.pem
@@ -0,0 +1,27 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/stg-e6.pem b/checker/testdata/stg-e6.pem
new file mode 100644
index 0000000..fb6fbf7
--- /dev/null
+++ b/checker/testdata/stg-e6.pem
@@ -0,0 +1,27 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/stg-e7.pem b/checker/testdata/stg-e7.pem
new file mode 100644
index 0000000..5bccd44
--- /dev/null
+++ b/checker/testdata/stg-e7.pem
@@ -0,0 +1,27 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/stg-e8.pem b/checker/testdata/stg-e8.pem
new file mode 100644
index 0000000..078eb26
--- /dev/null
+++ b/checker/testdata/stg-e8.pem
@@ -0,0 +1,27 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/stg-e9.pem b/checker/testdata/stg-e9.pem
new file mode 100644
index 0000000..124b7d6
--- /dev/null
+++ b/checker/testdata/stg-e9.pem
@@ -0,0 +1,27 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/stg-r10.pem b/checker/testdata/stg-r10.pem
new file mode 100644
index 0000000..59626c7
--- /dev/null
+++ b/checker/testdata/stg-r10.pem
@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----
diff --git a/checker/testdata/stg-r11.pem b/checker/testdata/stg-r11.pem
new file mode 100644
index 0000000..b18db54
--- /dev/null
+++ b/checker/testdata/stg-r11.pem
@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----
+MIIFOTCCAyGgAwIBAgIRAIhi6NAWsN5ZQodsQXyeyEIwDQYJKoZIhvcNAQELBQAw
+ZjELMAkGA1UEBhMCVVMxMzAxBgNVBAoTKihTVEFHSU5HKSBJbnRlcm5ldCBTZWN1
+cml0eSBSZXNlYXJjaCBHcm91cDEiMCAGA1UEAxMZKFNUQUdJTkcpIFByZXRlbmQg
+UGVhciBYMTAeFw0yNDAzMTMwMDAwMDBaFw0yNzAzMTIyMzU5NTlaMEYxCzAJBgNV
+BAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MR8wHQYDVQQDExZXYW5uYWJl
+IFdhdGVyY3Jlc3MgUjExMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA
+lbewUNTwm93akOgw8EnY1xUYAIxtL6yBtSjT6l6d168V1ntuC8DxJRCeGvrWGFyS
+vrFEsaIwGucJSppzyAxvjajsqsrQoNeF2BBqthkOW7W9MUnxvGoT9imPEcsxSgbl
+SUHeuuKa4ijF41x3G865TSTpn0Op5uPyYE9TwLtJCYQ1+M85vWwVTV57HV/2Gzpc
+N9DTDYY+klbVa2GGh00/bnqfI2d2sIgCJ1qPnOdHkkRj4RrAHjmxW1Kp9JK+rLcs
+COMytWUWia5AjT50UoNl1TP7B1hRQj0I9KJO8bfQVz+SVy0o8iWtL+reNKdqAcme
+FGrViAtRusH1yU71px6B3QIDAQABo4IBADCB/TAOBgNVHQ8BAf8EBAMCAYYwHQYD
+VR0lBBYwFAYIKwYBBQUHAwIGCCsGAQUFBwMBMBIGA1UdEwEB/wQIMAYBAf8CAQAw
+HQYDVR0OBBYEFCMC9QtIjCgCXbG2rY/jkOAaPh3tMB8GA1UdIwQYMBaAFLXzZfL+
+sAqSH/s8ffNEoKxjJcMUMDYGCCsGAQUFBwEBBCowKDAmBggrBgEFBQcwAoYaaHR0
+cDovL3N0Zy14MS5pLmxlbmNyLm9yZy8wEwYDVR0gBAwwCjAIBgZngQwBAgEwKwYD
+VR0fBCQwIjAgoB6gHIYaaHR0cDovL3N0Zy14MS5jLmxlbmNyLm9yZy8wDQYJKoZI
+hvcNAQELBQADggIBAKyn1BfnN7tZRIsF551iYhYQZdYxfbhNfdNvFwhIjzo+cZgZ
+WwAVeh2n3F/cWLh6jEDSFcq7ZLzWZ3W6yWUdQGqXUPnornTvRAO3P5GctvDsUd0U
+vWc/npWZoXicBDM4qooskMe2H2+b+hApvAyhREElSEaf0zezxIyjbhayBOJssERS
+x1wGx3mQgqq0dgb23otIgQNLDE44t3O1d8TnAEjGDJQLm4N8LykTG1L/2GJ0CCxu
+3gsiTtUsQc7M3lMqCqq0WVajN6vxxOFiakG+2hKTwAOTqtwC3AFS4XxbUhRYC6tT
+oQDY4Z1bHWFUTv4p2Zxg9SqXl3/kVxyrabECgrF/ILiMGMuncXzUkRykiZfTO2Af
+6pU3TZpIGSw9p/HHUM3RIlkT5GFFNj1c6KmlKIv2FjIjxjQWmqRAp17wi2Arapqh
++IEIBD4tx8zbVwgFwuS9UuHiGRDome+IUzVSUjK0bSzeBX0fYJw0Fdt20D3S/WCZ
+X0JfXESofubyEE6t9a+aaOY/+bE0wE8W0OA6nITq2NuLRVLI9/fiyR9F0cFl34WC
+nDUICS2uOTUkOtEcv70f84SSxmb7iK34ZSYmU455zmbYUrXac6Esm8riZaFZBLsZ
+g7P+9zpu5ckCyP6AmXm4jA0NhYi3/fF2Esw0ilaPQKLl96hjsODGf2AmEf3v
+-----END CERTIFICATE-----
diff --git a/checker/testdata/stg-r12.pem b/checker/testdata/stg-r12.pem
new file mode 100644
index 0000000..12bcc15
--- /dev/null
+++ b/checker/testdata/stg-r12.pem
@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----
+MIIFNzCCAx+gAwIBAgIRAIlgAJmGO3mLAcjFOWa2e5QwDQYJKoZIhvcNAQELBQAw
+ZjELMAkGA1UEBhMCVVMxMzAxBgNVBAoTKihTVEFHSU5HKSBJbnRlcm5ldCBTZWN1
+cml0eSBSZXNlYXJjaCBHcm91cDEiMCAGA1UEAxMZKFNUQUdJTkcpIFByZXRlbmQg
+UGVhciBYMTAeFw0yNDAzMTMwMDAwMDBaFw0yNzAzMTIyMzU5NTlaMEQxCzAJBgNV
+BAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MR0wGwYDVQQDExRSaWRkbGlu
+ZyBSaHViYXJiIFIxMjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAJCv
+ZBI95Ak3dA+Actf78hxVK1mySTPt1mUtNIcJJkUwt5ksI+0I1TXB7Ohg49F9rEbz
+HwiqAFX6lOg42v+kNpXQ5DmOoF5S3xDyon6nUDg03fcVqHfYjRrV0uLdUAJRrfxi
+C4KLZBMZgb4VsQbI5Uryh1Y+NE570kb2vv4UlLyN+sJB/zz0DNJ4IzaVOl+djOf1
+moJsipzhe1NypSH+T2YmnE+xHD8PCBlrXfsJwCYUtCyBCYY/+zsuNpZswDDxcsq/
+oXT58lNNr3PK/ZCDbCi5439ghdR/p0vZc/PnGlKlK1Qk3DpqTW3p5hnrrIVSV0we
+NEgKAmeXR2a1RyMzq6MCAwEAAaOCAQAwgf0wDgYDVR0PAQH/BAQDAgGGMB0GA1Ud
+JQQWMBQGCCsGAQUFBwMCBggrBgEFBQcDATASBgNVHRMBAf8ECDAGAQH/AgEAMB0G
+A1UdDgQWBBRjROE3Ku5kEt73jSdptdAOf8PNuTAfBgNVHSMEGDAWgBS182Xy/rAK
+kh/7PH3zRKCsYyXDFDA2BggrBgEFBQcBAQQqMCgwJgYIKwYBBQUHMAKGGmh0dHA6
+Ly9zdGcteDEuaS5sZW5jci5vcmcvMBMGA1UdIAQMMAowCAYGZ4EMAQIBMCsGA1Ud
+HwQkMCIwIKAeoByGGmh0dHA6Ly9zdGcteDEuYy5sZW5jci5vcmcvMA0GCSqGSIb3
+DQEBCwUAA4ICAQA47fqiSFOEDdpcATV447W19GIPsMbF7fHtVB8PPLrTmZX/AN8s
+1M7ex6tgk6MTvEUbMUGTczr1uWlrpruIivYn/d5k0sWgi+rzFAPEkFJ10yDmhZP7
+e1bva2QHWFtwl5elz7elZsFZY20zmzrQNhTjMiJ9ZgRvi9svlCfTurBAb/KW3KMb
+03OLcz5QV2NkXSCAQv1i/491PcoNXjzP8aTKAHIqZ/Piq0I/k9LX7uD1QbxCZp4J
+xd0bjpmOE4UpB0b8uxezqBRC5d12o2bnUzpVPfsjkbeSC9WkbCoVaLXER73/I+IY
+q4yqRulPd2VBA3IlqYHTrOu0Q5qB0T2QbLAw+0CryxoAPWA+0aAdVGjoSb+XVnyk
+2ZRm4iuyNxFEyPrJmjoeBoSbMYatM5r5FBrJQCNRgqPuZdvEnfVul8iZ/LHvFySA
+jPj19ZHrcbP+u7QFS1+aDp8UivtG8X+Wpitp05ladvwejxgXWKwspLE/9+Yugd1b
+xRjZQuyU7ZjHP35leoAzryiYJ/6RWyRQXbGVBHRyNMTO4U33D9u12gqWRW9Bg43Q
+b5eN0ZABAcccDvEVaF8O7L0KXBNzNcJAU7OcRe2QwkcKRugApcZv4D7g9yFLSZO3
+jM1xOf0oTo+pxkXY/kYj7yBw/QlQ8yCCSoNMDiTk4ER5EMT1ad7yAh1aiQ==
+-----END CERTIFICATE-----
diff --git a/checker/testdata/stg-r13.pem b/checker/testdata/stg-r13.pem
new file mode 100644
index 0000000..1c577db
--- /dev/null
+++ b/checker/testdata/stg-r13.pem
@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/checker/testdata/stg-r14.pem b/checker/testdata/stg-r14.pem
new file mode 100644
index 0000000..b26e026
--- /dev/null
+++ b/checker/testdata/stg-r14.pem
@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----