Oracle Apex 21.1：如何使用散列密码创建、存储和检索（验证）用户

Question

我正在使用 Oracle Apex 21.1 并希望为用户实施散列密码（公共页面，如电子商务网站）。如何在我的 Oracle Apex 应用程序中实现此功能？如果有适合初学者的分步教程，请分享链接。

Answer 1

DECLARE
   input_string       VARCHAR2 (200) :=  'Secret Message';
   output_string      VARCHAR2 (200);
   encrypted_raw      RAW (2000);             -- stores encrypted binary text
   decrypted_raw      RAW (2000);             -- stores decrypted binary text
   num_key_bytes      NUMBER := 256/8;        -- key length 256 bits (32 bytes)
   key_bytes_raw      RAW (32);               -- stores 256-bit encryption key
   encryption_type    PLS_INTEGER :=          -- total encryption type
                            DBMS_CRYPTO.ENCRYPT_AES256
                          + DBMS_CRYPTO.CHAIN_CBC
                          + DBMS_CRYPTO.PAD_PKCS5;
   iv_raw             RAW (16);

BEGIN
   DBMS_OUTPUT.PUT_LINE ( 'Original string: ' || input_string);
   key_bytes_raw := DBMS_CRYPTO.RANDOMBYTES (num_key_bytes);
   iv_raw        := DBMS_CRYPTO.RANDOMBYTES (16);
   encrypted_raw := DBMS_CRYPTO.ENCRYPT
      (
         src => UTL_I18N.STRING_TO_RAW (input_string,  'AL32UTF8'),
         typ => encryption_type,
         key => key_bytes_raw,
         iv  => iv_raw
      );
    -- The encrypted value "encrypted_raw" can be used here

   decrypted_raw := DBMS_CRYPTO.DECRYPT
      (
         src => encrypted_raw,
         typ => encryption_type,
         key => key_bytes_raw,
         iv  => iv_raw
      );
   output_string := UTL_I18N.RAW_TO_CHAR (decrypted_raw, 'AL32UTF8');
 
   DBMS_OUTPUT.PUT_LINE ('Decrypted string: ' || output_string); 
 
END;