Add TLS-PRF family (#875)

Fixes #874

The additional distinction for RFC7627 is to distinguish between usage
of the extended master secret and not.

Author: stevespringett

schema/cryptography-defs.json

@@ -865,6 +865,41 @@
         }
       ]
     },
+    {
+      "family": "TLS-PRF",
+      "standard": [
+        {
+          "name": "RFC2246",
+          "url": "https://doi.org/10.17487/RFC2246"
+        },
+        {
+          "name": "RFC5246",
+          "url": "https://doi.org/10.17487/RFC5246"
+        },
+        {
+          "name": "RFC7627",
+          "url": "https://doi.org/10.17487/RFC7627"
+        },
+        {
+          "name": "RFC8446",
+          "url": "https://doi.org/10.17487/RFC8446"
+        }
+      ],
+      "variant": [
+        {
+          "pattern": "TLS1-PRF[-RFC7627]",
+          "primitive": "kdf"
+        },
+        {
+          "pattern": "TLS12-PRF[-RFC7627][-{hashAlgorithm}]",
+          "primitive": "kdf"
+        },
+        {
+          "pattern": "TLS13-PRF[-{hashAlgorithm}]",
+          "primitive": "kdf"
+        }
+      ]
+    },
     {
       "family": "GOST",
       "variant": [