Add unittests for the detection of md[2,4,5] when verifying certificates

net/data/ssl/certificates/weak_digest_md2_ee.pem

Index: net/data/ssl/certificates/weak_digest_md2_ee.pem
diff --git a/net/data/ssl/certificates/weak_digest_md2_ee.pem b/net/data/ssl/certificates/weak_digest_md2_ee.pem
new file mode 100644
index 0000000000000000000000000000000000000000..6475ccc80b4e1e3333976d4b576082e931ce8e5e
--- /dev/null
+++ b/net/data/ssl/certificates/weak_digest_md2_ee.pem
@@ -0,0 +1,61 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 4 (0x4)
+        Signature Algorithm: md2WithRSAEncryption
+        Issuer: CN=Test Deprecated Digest Intermediate CA
+        Validity
+            Not Before: Oct 26 03:46:49 2011 GMT
+            Not After : Oct 23 03:46:49 2021 GMT
+        Subject: C=US, ST=California, L=Mountain View, O=Test CA, CN=127.0.0.1
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+            RSA Public Key: (1024 bit)
+                Modulus (1024 bit):
+                    00:c7:48:eb:5c:00:17:94:01:09:d3:bd:47:41:38:
+                    74:b8:4f:cb:ea:f1:15:eb:cb:e7:b5:6c:bd:fe:d9:
+                    97:6d:1e:1b:ee:75:9e:c1:6f:4a:5c:8c:d7:19:cf:
+                    51:89:48:e8:7d:79:41:ab:e3:a7:77:d1:de:f2:13:
+                    be:36:e7:44:c2:10:dd:56:83:03:f1:cd:e1:13:8d:
+                    fe:45:d6:1a:98:d8:8d:08:b9:32:10:36:0d:ec:ee:
+                    2d:66:22:eb:6a:0d:0e:f4:15:91:dd:9d:3e:92:db:
+                    9e:26:c8:af:4b:b7:fb:93:f8:68:07:c3:53:02:57:
+                    dc:d0:de:df:29:72:45:6f:e3
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Basic Constraints: critical
+                CA:FALSE
+            X509v3 Subject Key Identifier: 
+                35:5C:C8:0F:21:D0:A2:F5:69:44:5C:9E:B0:DC:0F:75:74:24:7A:FD
+            X509v3 Authority Key Identifier: 
+                keyid:A8:1D:06:8D:AD:3F:25:51:00:F0:3B:E9:35:C6:65:74:12:51:20:19
+
+            X509v3 Extended Key Usage: 
+                TLS Web Server Authentication, TLS Web Client Authentication
+            X509v3 Subject Alternative Name: 
+                IP Address:127.0.0.1
+    Signature Algorithm: md2WithRSAEncryption
+        87:d2:29:b3:6b:ba:36:99:ac:56:47:d8:7d:63:9e:74:a2:b5:
+        42:5e:2b:96:08:f8:ab:e2:ce:ea:99:21:47:25:2c:55:f2:db:
+        9d:d7:ed:d9:68:ba:09:90:b1:43:64:be:af:ef:9a:b4:10:86:
+        99:85:7f:68:fe:aa:fd:d4:6a:f1:68:e9:8f:61:d8:46:21:e4:
+        17:4c:89:db:82:37:36:8d:7f:93:4a:63:b1:da:ba:6b:19:ad:
+        34:8b:f8:11:c3:25:14:2a:4e:7b:75:6b:03:79:c1:e5:1a:5b:
+        ff:b4:91:47:4f:48:91:68:33:c7:3e:a5:95:45:81:2b:0d:35:
+        42:c4
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----