Purge unsupported RSA key sizes from VTS tests

Support for 256 bit RSA keys are not mandated by keymaster specs and
must not be used in the VTS tests.

Bug: 62581389
Change-Id: If315088db2752ac2efe31fdb95db7ca13c3ce225
diff --git a/keymaster/3.0/vts/functional/keymaster_hidl_hal_test.cpp b/keymaster/3.0/vts/functional/keymaster_hidl_hal_test.cpp
index 54c5ad5..0c888dc 100644
--- a/keymaster/3.0/vts/functional/keymaster_hidl_hal_test.cpp
+++ b/keymaster/3.0/vts/functional/keymaster_hidl_hal_test.cpp
@@ -1329,7 +1329,7 @@
  */
 TEST_F(GetKeyCharacteristicsTest, SimpleRsa) {
     ASSERT_EQ(ErrorCode::OK, GenerateKey(AuthorizationSetBuilder()
-                                             .RsaSigningKey(256, 3)
+                                             .RsaSigningKey(1024, 3)
                                              .Digest(Digest::NONE)
                                              .Padding(PaddingMode::NONE)));
 
@@ -2201,7 +2201,7 @@
  */
 TEST_F(ExportKeyTest, RsaUnsupportedKeyFormat) {
     ASSERT_EQ(ErrorCode::OK, GenerateKey(AuthorizationSetBuilder()
-                                             .RsaSigningKey(256, 3)
+                                             .RsaSigningKey(1024, 3)
                                              .Digest(Digest::NONE)
                                              .Padding(PaddingMode::NONE)));
     HidlBuf export_data;
@@ -2218,7 +2218,7 @@
 TEST_F(ExportKeyTest, DISABLED_RsaCorruptedKeyBlob) {
     ASSERT_EQ(ErrorCode::OK, GenerateKey(AuthorizationSetBuilder()
                                              .Authorization(TAG_NO_AUTH_REQUIRED)
-                                             .RsaSigningKey(256, 3)
+                                             .RsaSigningKey(1024, 3)
                                              .Digest(Digest::NONE)
                                              .Padding(PaddingMode::NONE)));
     for (size_t i = 0; i < key_blob_.size(); ++i) {