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

net/data/ssl/certificates/weak_digest_md4_ee.pem

Index: net/data/ssl/certificates/weak_digest_md4_ee.pem
diff --git a/net/data/ssl/certificates/weak_digest_md4_ee.pem b/net/data/ssl/certificates/weak_digest_md4_ee.pem
new file mode 100644
index 0000000000000000000000000000000000000000..6ea4b257d5c124614c320b27d052f46db42a3303
--- /dev/null
+++ b/net/data/ssl/certificates/weak_digest_md4_ee.pem
@@ -0,0 +1,61 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 3 (0x3)
+        Signature Algorithm: md4WithRSAEncryption
+        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: md4WithRSAEncryption
+        a5:f6:ae:83:a1:44:5a:dd:c4:91:a2:d6:88:d8:c6:d1:e5:6d:
+        c8:71:7a:43:3e:e2:ce:42:a4:7d:94:16:5d:0a:df:33:e3:ea:
+        c9:22:e3:52:9d:f7:72:3e:24:d5:78:38:67:9f:2d:46:cb:73:
+        c5:1f:eb:4b:02:5c:25:41:e0:c5:07:03:4c:4c:55:87:db:32:
+        d0:2e:3e:aa:d4:a6:69:75:12:75:2e:b6:98:24:0e:18:c4:1c:
+        60:aa:c5:19:c1:1c:ad:ba:f4:c8:c0:55:2b:61:7d:a4:f4:c6:
+        73:0d:61:7e:04:42:e2:69:8d:9c:9d:83:22:e4:cc:cc:3f:b5:
+        2a:6d
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----