!10336 【算法库适配层】提供PKCS8格式的ECC私钥基于RFC5208规范和RFC5915规范的转换能力

Merge pull request !10336 from jchx/master

api/@ohos.security.cryptoFramework.d.ts

@@ -586,6 +586,20 @@ declare namespace cryptoFramework {
      * @since 11
      */
     getAsyKeySpec(itemType: AsyKeySpecItem): bigint | string | number;
+
+    /**
+     * Encode the private key object to binary data in DER format.
+     *
+     * @param { string } format - indicates the encoding format.
+     * @returns { DataBlob } the binary data of the key object in DER format.
+     * @throws { BusinessError } 401 - invalid parameters.
+     * @throws { BusinessError } 17620001 - memory error.
+     * @throws { BusinessError } 17630001 - crypto operation error.
+     * @syscap SystemCapability.Security.CryptoFramework
+     * @crossplatform
+     * @since 12
+     */
+    getEncodedDer(format: string): DataBlob;
   }
 
   /**