[英]Correct way to store and retrieve SHA-256 hashed and salted passwords
[英]Oracle Apex 21.1: how to's require for create, store and retrieve (authenticate) users with hashed passwords
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方法教程,请分享链接。
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;
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