Use key_type column for cert get/rotate/reissue/display

Added unit tests

lemur/certificates/models.py

@@ -235,6 +235,7 @@ class Certificate(db.Model):
         self.replaces = kwargs.get("replaces", [])
         self.rotation = kwargs.get("rotation")
         self.rotation_policy = kwargs.get("rotation_policy")
+        self.key_type = kwargs.get("key_type")
         self.signing_algorithm = defaults.signing_algorithm(cert)
         self.bits = defaults.bitstrength(cert)
         self.external_id = kwargs.get("external_id")

lemur/certificates/schemas.py

@@ -155,6 +155,14 @@ class CertificateInputSchema(CertificateCreationSchema):
             key_type = cert_utils.get_key_type_from_csr(data["csr"])
             if key_type:
                 data["key_type"] = key_type
+
+        # This code will be exercised for certificate import (without CSR)
+        if data.get("key_type") is None:
+            if data.get("body"):
+                data["key_type"] = utils.get_key_type_from_certificate(data["body"])
+            else:
+                data["key_type"] = "RSA2048"  # default value
+
         return missing.convert_validity_years(data)
 
 
@@ -277,6 +285,7 @@ class CertificateOutputSchema(LemurOutputSchema):
     serial = fields.String()
     serial_hex = Hex(attribute="serial")
     signing_algorithm = fields.String()
+    key_type = fields.String(allow_none=True)
 
     status = fields.String()
     user = fields.Nested(UserNestedOutputSchema)