cipher wipe out

Author: ggershinsky

cpp/src/parquet/util/crypto.h

@@ -59,6 +59,12 @@ class AesEncryptor {
                           int key_len, uint8_t* aad, int aad_len, uint8_t* nonce,
                           uint8_t* encrypted_footer);
 
+  void WipeOut() {
+    if (NULLPTR != ctx_) {
+      EVP_CIPHER_CTX_free(ctx_);
+    }
+  }
+
   ~AesEncryptor() {
     if (NULLPTR != ctx_) {
       EVP_CIPHER_CTX_free(ctx_);
@@ -91,6 +97,12 @@ class AesDecryptor {
   int Decrypt(const uint8_t* ciphertext, int ciphertext_len, uint8_t* key, int key_len,
               uint8_t* aad, int aad_len, uint8_t* plaintext);
 
+  void WipeOut() {
+    if (NULLPTR != ctx_) {
+      EVP_CIPHER_CTX_free(ctx_);
+    }
+  }
+
   ~AesDecryptor() {
     if (NULLPTR != ctx_) {
       EVP_CIPHER_CTX_free(ctx_);