feat: add support for Raw PKCS#1 signing keys (#651)

* feat: add support for Raw PKCS#1 signing keys

PiperOrigin-RevId: 403966825

Source-Link: googleapis/googleapis@5b0219d

Source-Link: https://github.com/googleapis/googleapis-gen/commit/ea0000e708e860b65b574783d5ea61ad340911be
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiZWEwMDAwZTcwOGU4NjBiNjViNTc0NzgzZDVlYTYxYWQzNDA5MTFiZSJ9

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

google-cloud-kms/src/main/java/com/google/cloud/kms/v1/KeyManagementServiceClient.java

@@ -2943,7 +2943,7 @@ public final UnaryCallable<DecryptRequest, DecryptResponse> decryptCallable() {
    *
    * @param name Required. The resource name of the
    *     [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] to use for signing.
-   * @param digest Required. The digest of the data to sign. The digest must be produced with the
+   * @param digest Optional. The digest of the data to sign. The digest must be produced with the
    *     same digest algorithm as specified by the key version's
    *     [algorithm][google.cloud.kms.v1.CryptoKeyVersion.algorithm].
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -2980,7 +2980,7 @@ public final AsymmetricSignResponse asymmetricSign(CryptoKeyVersionName name, Di
    *
    * @param name Required. The resource name of the
    *     [CryptoKeyVersion][google.cloud.kms.v1.CryptoKeyVersion] to use for signing.
-   * @param digest Required. The digest of the data to sign. The digest must be produced with the
+   * @param digest Optional. The digest of the data to sign. The digest must be produced with the
    *     same digest algorithm as specified by the key version's
    *     [algorithm][google.cloud.kms.v1.CryptoKeyVersion.algorithm].
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -3015,6 +3015,8 @@ public final AsymmetricSignResponse asymmetricSign(String name, Digest digest) {
    *                   .toString())
    *           .setDigest(Digest.newBuilder().build())
    *           .setDigestCrc32C(Int64Value.newBuilder().build())
+   *           .setData(ByteString.EMPTY)
+   *           .setDataCrc32C(Int64Value.newBuilder().build())
    *           .build();
    *   AsymmetricSignResponse response = keyManagementServiceClient.asymmetricSign(request);
    * }
@@ -3051,6 +3053,8 @@ public final AsymmetricSignResponse asymmetricSign(AsymmetricSignRequest request
    *                   .toString())
    *           .setDigest(Digest.newBuilder().build())
    *           .setDigestCrc32C(Int64Value.newBuilder().build())
+   *           .setData(ByteString.EMPTY)
+   *           .setDataCrc32C(Int64Value.newBuilder().build())
    *           .build();
    *   ApiFuture<AsymmetricSignResponse> future =
    *       keyManagementServiceClient.asymmetricSignCallable().futureCall(request);

google-cloud-kms/src/test/java/com/google/cloud/kms/v1/KeyManagementServiceClientTest.java

@@ -2077,6 +2077,7 @@ public void asymmetricSignTest() throws Exception {
             .setSignatureCrc32C(Int64Value.newBuilder().build())
             .setVerifiedDigestCrc32C(true)
             .setName("name3373707")
+            .setVerifiedDataCrc32C(true)
             .setProtectionLevel(ProtectionLevel.forNumber(0))
             .build();
     mockKeyManagementService.addResponse(expectedResponse);
@@ -2126,6 +2127,7 @@ public void asymmetricSignTest2() throws Exception {
             .setSignatureCrc32C(Int64Value.newBuilder().build())
             .setVerifiedDigestCrc32C(true)
             .setName("name3373707")
+            .setVerifiedDataCrc32C(true)
             .setProtectionLevel(ProtectionLevel.forNumber(0))
             .build();
     mockKeyManagementService.addResponse(expectedResponse);

proto-google-cloud-kms-v1/src/main/java/com/google/cloud/kms/v1/AsymmetricDecryptRequest.java

@@ -310,7 +310,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
     }
     if (!ciphertext_.isEmpty()) {
@@ -328,7 +328,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (!getNameBytes().isEmpty()) {
+    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, name_);
     }
     if (!ciphertext_.isEmpty()) {