CSHARP-5625: Support text indexes for explicit encryption (#1770)

Author: adelinowona

specifications/client-side-encryption/prose-tests/etc/data/encryptedFields-prefix-suffix.json

@@ -0,0 +1,38 @@
+{
+  "fields": [
+    {
+            "keyId": {
+                "$binary": {
+                    "base64": "EjRWeBI0mHYSNBI0VniQEg==",
+                    "subType": "04"
+                }
+            },
+            "path": "encryptedText",
+            "bsonType": "string",
+            "queries": [
+                {
+                    "queryType": "prefixPreview",
+                    "strMinQueryLength": {
+                        "$numberInt": "2"
+                    },
+                    "strMaxQueryLength": {
+                        "$numberInt": "10"
+                    },
+                    "caseSensitive": true,
+                    "diacriticSensitive": true
+                },
+                {
+                    "queryType": "suffixPreview",
+                    "strMinQueryLength": {
+                        "$numberInt": "2"
+                    },
+                    "strMaxQueryLength": {
+                        "$numberInt": "10"
+                    },
+                    "caseSensitive": true,
+                    "diacriticSensitive": true
+                }
+            ]
+        }
+  ]
+}

specifications/client-side-encryption/prose-tests/etc/data/encryptedFields-substring.json

@@ -0,0 +1,30 @@
+{
+  "fields": [
+    {
+            "keyId": {
+                "$binary": {
+                    "base64": "EjRWeBI0mHYSNBI0VniQEg==",
+                    "subType": "04"
+                }
+            },
+            "path": "encryptedText",
+            "bsonType": "string",
+            "queries": [
+                {
+                    "queryType": "substringPreview",
+                    "strMaxLength": {
+                        "$numberInt": "10"
+                    },
+                    "strMinQueryLength": {
+                        "$numberInt": "2"
+                    },
+                    "strMaxQueryLength": {
+                        "$numberInt": "10"
+                    },
+                    "caseSensitive": true,
+                    "diacriticSensitive": true
+                }
+            ]
+        }
+  ]
+}

src/MongoDB.Driver.Encryption/CryptClient.cs

@@ -105,7 +105,7 @@ public CryptContext StartEncryptionContext(string db, byte[] command)
         /// <summary>
         /// Starts an explicit encryption context.
         /// </summary>
-        public CryptContext StartExplicitEncryptionContext(byte[] keyId, byte[] keyAltName, string queryType, long? contentionFactor, string encryptionAlgorithm, byte[] message, byte[] rangeOptions, bool isExpressionMode = false)
+        public CryptContext StartExplicitEncryptionContext(byte[] keyId, byte[] keyAltName, string queryType, long? contentionFactor, string encryptionAlgorithm, byte[] message, byte[] rangeOptions, byte[] textOptions, bool isExpressionMode = false)
         {
             var handle = Library.mongocrypt_ctx_new(_handle);
 
@@ -123,6 +123,11 @@ public CryptContext StartExplicitEncryptionContext(byte[] keyId, byte[] keyAltNa
                 PinnedBinary.RunAsPinnedBinary(handle, rangeOptions, _status, (h, pb) => Library.mongocrypt_ctx_setopt_algorithm_range(h, pb));
             }
 
+            if (textOptions != null)
+            {
+                PinnedBinary.RunAsPinnedBinary(handle, textOptions, _status, (h, pb) => Library.mongocrypt_ctx_setopt_algorithm_text(h, pb));
+            }
+
             handle.Check(_status, Library.mongocrypt_ctx_setopt_algorithm(handle, encryptionAlgorithm, -1));
 
             if (queryType != null)