feat(spanner): login functionality Spanner Omni

Author: sagnghos

java-spanner/google-cloud-spanner/pom.xml

@@ -159,14 +159,19 @@
         <version>0.6.1</version>
         <configuration>
           <protocArtifact>com.google.protobuf:protoc:4.33.2:exe:${os.detected.classifier}</protocArtifact>
+          <pluginId>grpc-java</pluginId>
+          <pluginArtifact>io.grpc:protoc-gen-grpc-java:1.64.0:exe:${os.detected.classifier}</pluginArtifact>
           <additionalProtoPathElements>
             <additionalProtoPathElement>${project.basedir}/../proto-google-cloud-spanner-v1/src/main/proto</additionalProtoPathElement>
+            <additionalProtoPathElement>${project.basedir}/../google-cloud-spanner/src/main/proto</additionalProtoPathElement>  
           </additionalProtoPathElements>
         </configuration>
         <executions>
           <execution>
-            <id>test-compile</id>
+            <id>compile</id>
             <goals>
+              <goal>compile</goal>
+              <goal>compile-custom</goal>
               <goal>test-compile</goal>
             </goals>
           </execution>
@@ -544,6 +549,16 @@
           <groupId>javax.annotation</groupId>
           <artifactId>javax.annotation-api</artifactId>
         </dependency>
+    <dependency>
+      <groupId>org.bouncycastle</groupId>
+      <artifactId>bcprov-jdk18on</artifactId>
+      <version>1.78</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.crypto.tink</groupId>
+      <artifactId>tink</artifactId>
+      <version>1.13.0</version>
+    </dependency>
       </dependencies>
     </profile>
     <profile>

java-spanner/google-cloud-spanner/src/main/java/com/google/cloud/spanner/SpannerOptions.java

@@ -91,6 +91,7 @@
 import java.io.IOException;
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.time.Duration;
@@ -1817,6 +1818,84 @@ public Builder setExperimentalHost(String host) {
       return this;
     }
 
+
+        /**
+     * Authenticates to Spanner Omni using the provided username and password file, and configures
+     * the resulting token for use in subsequent Spanner API calls. The endpoint must be set on the
+     * builder before calling this method.
+     *
+     * @param username The username for login.
+     * @param passwordFile The path to a file containing the password.
+     * @return this builder
+     */
+    public Builder login(String username, String passwordFile) {
+      return login(username, passwordFile, true);
+    }
+
+    /**
+     * Authenticates to Spanner Omni using the provided username and password file, and configures
+     * the resulting token for use in subsequent Spanner API calls. The endpoint must be set on the
+     * builder before calling this method.
+     *
+     * @param username The username for login.
+     * @param passwordFile The path to a file containing the password.
+     * @param backgroundRefresh Whether to proactively refresh the token in a background thread before it expires. If false, GAX still triggers a synchronous inline refresh upon UNAUTHENTICATED error.
+     * @return this builder
+     */
+    public Builder login(String username, String passwordFile, boolean backgroundRefresh) {
+      try {
+        byte[] rawBytes = Files.readAllBytes(Paths.get(passwordFile));
+        int len = rawBytes.length;
+        while (len > 0 && (rawBytes[len - 1] == '\n' || rawBytes[len - 1] == '\r')) {
+          len--;
+        }
+        byte[] passwordBytes = java.util.Arrays.copyOf(rawBytes, len);
+        return loginWithPasswordBytes(username, passwordBytes, backgroundRefresh);
+      } catch (IOException e) {
+        throw SpannerExceptionFactory.newSpannerException(
+            ErrorCode.NOT_FOUND, "Could not read password file: " + passwordFile, e);
+      }
+    }
+
+    /**
+     * Authenticates to Spanner Omni using the provided username and password, and configures the
+     * resulting token for use in subsequent Spanner API calls. The endpoint must be set on the
+     * builder before calling this method.
+     *
+     * @param username The username for login.
+     * @param password The password for login.
+     * @return this builder
+     */
+    public Builder loginWithPassword(String username, String password) {
+      return loginWithPassword(username, password, true);
+    }
+
+    /**
+     * Authenticates to Spanner Omni using the provided username and password, and configures the
+     * resulting token for use in subsequent Spanner API calls. The endpoint must be set on the
+     * builder before calling this method.
+     *
+     * @param username The username for login.
+     * @param password The password for login.
+     * @param backgroundRefresh Whether to proactively refresh the token in a background thread before it expires. If false, GAX still triggers a synchronous inline refresh upon UNAUTHENTICATED error.
+     * @return this builder
+     */
+    public Builder loginWithPassword(String username, String password, boolean backgroundRefresh) {
+      return loginWithPasswordBytes(username, password.getBytes(StandardCharsets.UTF_8), backgroundRefresh);
+    }
+
+    private Builder loginWithPasswordBytes(String username, byte[] password, boolean backgroundRefresh) {
+      if (this.experimentalHost == null) {
+        throw new IllegalStateException("Endpoint must be set before calling login.");
+      }
+      String target = this.experimentalHost.replaceFirst("^https?://", "");
+      com.google.crypto.tink.util.SecretBytes secretBytes = com.google.crypto.tink.util.SecretBytes.copyFrom(
+          password, com.google.crypto.tink.InsecureSecretKeyAccess.get());
+      java.util.Arrays.fill(password, (byte) 0);
+      super.setCredentials(new com.google.cloud.spanner.omni.SpannerOmniCredentials(username, secretBytes, target, backgroundRefresh));
+      return this;
+    }
+
     /** Enables gRPC-GCP extension with the default settings. This option is enabled by default. */
     public Builder enableGrpcGcpExtension() {
       return this.enableGrpcGcpExtension(null);