DOCSP-31527 Add byte length check to QE quick starts (#5515)

* Check byte length when reading local key

* fix emphasized lines

* update byte length check to equality

Author: jordan-smith721

source/core/queryable-encryption/quick-start.txt

@@ -367,7 +367,7 @@ Procedure
                   .. literalinclude:: /includes/qe-tutorials/mongosh/queryable-encryption-helpers.js
                      :start-after: start-get-local-key
                      :end-before: end-get-local-key
-                     :emphasize-lines: 3-7
+                     :emphasize-lines: 10-14
                      :language: javascript
                      :dedent:
 
@@ -377,7 +377,7 @@ Procedure
                   .. literalinclude:: /includes/qe-tutorials/node/queryable-encryption-helpers.js
                      :start-after: start-get-local-key
                      :end-before: end-get-local-key
-                     :emphasize-lines: 3-7
+                     :emphasize-lines: 10-14
                      :language: javascript
                      :dedent:
 
@@ -388,7 +388,7 @@ Procedure
                      :start-after: start-get-local-key
                      :end-before: end-get-local-key
                      :language: python
-                     :emphasize-lines: 4-8
+                     :emphasize-lines: 6-10
                      :dedent:
 
                .. tab::
@@ -408,7 +408,7 @@ Procedure
                      :start-after: start-get-local-key
                      :end-before: end-get-local-key
                      :language: go
-                     :emphasize-lines: 6
+                     :emphasize-lines: 8
                      :dedent:
 
                .. tab::
@@ -418,7 +418,7 @@ Procedure
                      :start-after: start-get-local-key
                      :end-before: end-get-local-key
                      :language: csharp
-                     :emphasize-lines: 8-13
+                     :emphasize-lines: 13-18
                      :dedent:
 
          .. step:: Set Your Automatic Encryption Options

source/includes/qe-tutorials/csharp/QueryableEncryptionHelpers.cs

@@ -100,6 +100,11 @@ public Dictionary<string, IReadOnlyDictionary<string, object>> GetKmsProviderCre
                 var localCustomerMasterKeyBase64 = File.ReadAllText("customer-master-key.txt");
                 var localCustomerMasterKeyBytes = Convert.FromBase64String(localCustomerMasterKeyBase64);
 
+                if (localCustomerMasterKeyBytes.Length != 96)
+                {
+                    throw new Exception("Expected the customer master key file to be 96 bytes.");
+                }
+
                 var localOptions = new Dictionary<string, object>
                 {
                     { "key", localCustomerMasterKeyBytes }

source/includes/qe-tutorials/go/queryable_encryption_helpers.go

@@ -84,6 +84,9 @@ func GetKmsProviderCredentials(kmsProviderName string) map[string]map[string]int
 		if err != nil {
 			panic(fmt.Sprintf("Could not read the Customer Master Key: %v", err))
 		}
+		if len(key) != 96 {
+			panic(fmt.Sprintf("Expected the customer master key file to be 96 bytes."))
+		}
 		kmsProviderCredentials := map[string]map[string]interface{}{"local": {"key": key}}
 		// end-get-local-key
 		return kmsProviderCredentials

source/includes/qe-tutorials/java/src/main/java/com/mongodb/tutorials/qe/util/QueryableEncryptionHelpers.java

@@ -45,8 +45,8 @@ public static Map<String, Map<String, Object>> getKmsProviderCredentials(String
             byte[] localCustomerMasterKey = new byte[96];
 
             try (FileInputStream fis = new FileInputStream("customer-master-key.txt")) {
-                if (fis.read(localCustomerMasterKey) < 96)
-                    throw new Exception("Expected to read 96 bytes from the customer master key file");
+                if (fis.read(localCustomerMasterKey) != 96)
+                    throw new Exception("Expected the customer master key file to be 96 bytes.");
             } catch (Exception e) {
                 throw new Exception("Unable to read the Customer Master Key due to the following error: " + e.getMessage());
             }

source/includes/qe-tutorials/mongosh/queryable-encryption-helpers.js

@@ -68,6 +68,13 @@ function getKMSProviderCredentials(kmsProviderName) {
         // start-get-local-key
         // WARNING: Do not use a local key file in a production application
         const localMasterKey = fs.readFileSync("./customer-master-key.txt");
+
+        if (localMasterKey.length !== 96) {
+          throw new Error(
+            "Expected the customer master key file to be 96 bytes."
+          );
+        }
+
         kmsProviderCredentials = {
           local: {
             key: localMasterKey,

source/includes/qe-tutorials/node/queryable-encryption-helpers.js

@@ -69,6 +69,13 @@ export function getKMSProviderCredentials(kmsProviderName) {
         // start-get-local-key
         // WARNING: Do not use a local key file in a production application
         const localMasterKey = readFileSync("./customer-master-key.txt");
+
+        if (localMasterKey.length !== 96) {
+          throw new Error(
+            "Expected the customer master key file to be 96 bytes."
+          );
+        }
+
         kmsProviders = {
           local: {
             key: localMasterKey,
@@ -183,7 +190,10 @@ function getKmipTlsOptions() {
 
 export function getClientEncryption(encryptedClient, autoEncryptionOptions) {
   // start-client-encryption
-  const clientEncryption = new ClientEncryption(encryptedClient, autoEncryptionOptions);
+  const clientEncryption = new ClientEncryption(
+    encryptedClient,
+    autoEncryptionOptions
+  );
   // end-client-encryption
   return clientEncryption;
 }

source/includes/qe-tutorials/python/queryable_encryption_helpers.py

@@ -65,6 +65,8 @@ def get_kms_provider_credentials(kms_provider_string):
             path = "./customer-master-key.txt"
             with open(path, "rb") as f:
                 local_master_key = f.read()
+                if len(local_master_key) != 96:
+                    raise Exception("Expected the customer master key file to be 96 bytes.")
                 kms_provider_credentials = {
                     "local": {
                         "key": local_master_key