application/x-x509-ca-cert: add magics and test cases

"BEGIN/END CA CERTIFICATE" seems to be a thing, although not that
common. "BEGIN/END TRUSTED CERTIFICATE" is an OpenSSL marker for trusted
certificates, see x509(1).

3 files changed, 64 insertions, 0 deletions

diff --git a/tests/mime-detection/list b/tests/mime-detection/list
index 16c4ef84..d241414f 100644
--- a/tests/mime-detection/list
+++ b/tests/mime-detection/list
@@ -708,6 +708,10 @@ test.p12 application/pkcs12 ox
 test.cer application/pkix-cert
 # https://letsencrypt.org/certs/lets-encrypt-r3.pem with header and footer modified to contain X509
 test-x509.cer application/pkix-cert
+# https://letsencrypt.org/certs/lets-encrypt-r3.pem with header and footer modified to contain CA
+test.crt application/x-x509-ca-cert
+# https://letsencrypt.org/certs/lets-encrypt-r3.pem with header and footer modified to contain TRUSTED
+test-trusted.crt application/x-x509-ca-cert
 # curl https://crl.root-x1.letsencrypt.org | openssl crl -inform DER -out test.crl
 test.crl application/pkix-crl
 test.sav application/x-spss-sav
diff --git a/tests/mime-detection/test-trusted.crt b/tests/mime-detection/test-trusted.crt
new file mode 100644
index 00000000..a05e9350
--- /dev/null
+++ b/tests/mime-detection/test-trusted.crt
@@ -0,0 +1,30 @@
+-----BEGIN TRUSTED CERTIFICATE-----
+MIIFFjCCAv6gAwIBAgIRAJErCErPDBinU/bWLiWnX1owDQYJKoZIhvcNAQELBQAw
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+MldlTTKB3zhThV1+XWYp6rjd5JW1zbVWEkLNxE7GJThEUG3szgBVGP7pSWTUTsqX
+nLRbwHOoq7hHwg==
+-----END TRUSTED CERTIFICATE-----
diff --git a/tests/mime-detection/test.crt b/tests/mime-detection/test.crt
new file mode 100644
index 00000000..9abb88d8
--- /dev/null
+++ b/tests/mime-detection/test.crt
@@ -0,0 +1,30 @@
+-----BEGIN CA CERTIFICATE-----
+MIIFFjCCAv6gAwIBAgIRAJErCErPDBinU/bWLiWnX1owDQYJKoZIhvcNAQELBQAw
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+nLRbwHOoq7hHwg==
+-----END CA CERTIFICATE-----