AWS Key Management Service Update: Remove unpopulated KeyMaterialId from Encrypt Response

Author: AWS

.changes/next-release/feature-AWSKeyManagementService-e6dc264.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS Key Management Service",
+    "contributor": "",
+    "description": "Remove unpopulated KeyMaterialId from Encrypt Response"
+}

services/kms/src/main/resources/codegen-resources/service-2.json

@@ -1608,7 +1608,7 @@
         },
         "KeyMaterialId":{
           "shape":"BackingKeyIdType",
-          "documentation":"<p>The identifier of the key material used to decrypt the ciphertext. This field is present only when the operation uses a symmetric encryption KMS key.</p>"
+          "documentation":"<p>The identifier of the key material used to decrypt the ciphertext. This field is present only when the operation uses a symmetric encryption KMS key. This field is omitted if the request includes the <code>Recipient</code> parameter.</p>"
         }
       }
     },
@@ -1918,10 +1918,6 @@
         "EncryptionAlgorithm":{
           "shape":"EncryptionAlgorithmSpec",
           "documentation":"<p>The encryption algorithm that was used to encrypt the plaintext.</p>"
-        },
-        "KeyMaterialId":{
-          "shape":"BackingKeyIdType",
-          "documentation":"<p>The identifier of the key material used to encrypt the ciphertext. This field is present only when the operation uses a symmetric encryption KMS key.</p>"
         }
       }
     },
@@ -2023,7 +2019,7 @@
         },
         "KeyMaterialId":{
           "shape":"BackingKeyIdType",
-          "documentation":"<p>The identifier of the key material used to encrypt the private key.</p>"
+          "documentation":"<p>The identifier of the key material used to encrypt the private key. This field is omitted if the request includes the <code>Recipient</code> parameter.</p>"
         }
       }
     },
@@ -2136,7 +2132,7 @@
         },
         "KeyMaterialId":{
           "shape":"BackingKeyIdType",
-          "documentation":"<p>The identifier of the key material used to encrypt the data key.</p>"
+          "documentation":"<p>The identifier of the key material used to encrypt the data key. This field is omitted if the request includes the <code>Recipient</code> parameter.</p>"
         }
       }
     },