diff --git a/plugin/openssl_plugin/crypto_operation/rsa/src/cipher_rsa_openssl.c b/plugin/openssl_plugin/crypto_operation/rsa/src/cipher_rsa_openssl.c
index 69ab3e1ee9b4504d8b6bff21e6809accc83173d7..46e2f7ae6148031fa8e9241fa0a89db26842d066 100644
--- a/plugin/openssl_plugin/crypto_operation/rsa/src/cipher_rsa_openssl.c
+++ b/plugin/openssl_plugin/crypto_operation/rsa/src/cipher_rsa_openssl.c
@@ -282,7 +282,6 @@ static void EngineDestroySpiImpl(HcfObjectBase *generator)
     EVP_PKEY_CTX_free(impl->ctx);
     impl->ctx = NULL;
     HcfFree(impl);
-    generator = NULL;
 }
 
 static const char *EngineGetClass()
diff --git a/plugin/openssl_plugin/crypto_operation/signature/src/signature_rsa_openssl.c b/plugin/openssl_plugin/crypto_operation/signature/src/signature_rsa_openssl.c
index d8ff2349336f9a52aab3b2094d3114c0ede1e4e5..77733cd57b29ed81e7653a10af5e31c9cd672079 100644
--- a/plugin/openssl_plugin/crypto_operation/signature/src/signature_rsa_openssl.c
+++ b/plugin/openssl_plugin/crypto_operation/signature/src/signature_rsa_openssl.c
@@ -322,7 +322,7 @@ static HcfResult EngineVerifyUpdate(HcfVerifySpi *self, HcfBlob *data)
 static HcfResult EngineSign(HcfSignSpi *self, HcfBlob *data, HcfBlob *returnSignatureData)
 {
     LOGI("EngineSign start");
-    if (self == NULL || data == NULL || data->data == NULL || returnSignatureData == NULL) {
+    if (self == NULL || returnSignatureData == NULL) {
         LOGE("Invalid input params.");
         return HCF_INVALID_PARAMS;
     }
@@ -373,7 +373,7 @@ static HcfResult EngineSign(HcfSignSpi *self, HcfBlob *data, HcfBlob *returnSign
 static bool EngineVerify(HcfVerifySpi *self, HcfBlob *data, HcfBlob *signatureData)
 {
     LOGI("EngineVerify start");
-    if (self == NULL || data == NULL || data->data == NULL || signatureData == NULL || signatureData->data == NULL) {
+    if (self == NULL || signatureData == NULL || signatureData->data == NULL) {
         LOGE("Invalid input params");
         return false;
     }
diff --git a/plugin/openssl_plugin/key/asy_key_generator/src/rsa_asy_key_generator_openssl.c b/plugin/openssl_plugin/key/asy_key_generator/src/rsa_asy_key_generator_openssl.c
index 3330b631031815092721106806e930ceb97f3125..e6611b6dc9cdb787e4db8d532300336bbfa7288d 100644
--- a/plugin/openssl_plugin/key/asy_key_generator/src/rsa_asy_key_generator_openssl.c
+++ b/plugin/openssl_plugin/key/asy_key_generator/src/rsa_asy_key_generator_openssl.c
@@ -160,7 +160,6 @@ static void DestroyPubKey(HcfObjectBase *self)
     RSA_free(impl->pk);
     impl->pk = NULL;
     HcfFree(self);
-    self = NULL;
 }
 
 static void DestroyPriKey(HcfObjectBase *self)
@@ -179,7 +178,6 @@ static void DestroyPriKey(HcfObjectBase *self)
         impl->sk = NULL;
     }
     HcfFree(impl);
-    self = NULL;
 }
 
 static void DestroyKeyPair(HcfObjectBase *self)
@@ -198,7 +196,6 @@ static void DestroyKeyPair(HcfObjectBase *self)
     OH_HCF_ObjDestroy((HcfObjectBase *)impl->base.pubKey);
     impl->base.pubKey = NULL;
     HcfFree(self);
-    self = NULL;
 }
 
 static HcfResult RsaSaveKeyMaterial(const RSA *rsa, const uint32_t keySize, HcfBlob *key, bool needPrivate)
@@ -480,7 +477,6 @@ static void DestroyKeyGeneratorSpiImpl(HcfObjectBase *self)
     HcfFree(impl->params);
     impl->params = NULL;
     HcfFree(self);
-    self = NULL;
     LOGI("DestroyKeyGeneratorSpiImpl end.");
 }