oracle实现aes加解密
时间: 2023-07-07 07:23:11 浏览: 52
Oracle提供了DBMS_CRYPTO包来实现AES加解密。
以下是一个简单的示例:
1. 创建测试表格
```
CREATE TABLE test_table (id NUMBER, data CLOB);
```
2. 插入测试数据
```
INSERT INTO test_table VALUES (1, 'hello world');
```
3. 创建加密过程
```
CREATE OR REPLACE FUNCTION encrypt_data (p_key IN VARCHAR2, p_data IN CLOB)
RETURN RAW
IS
l_encrypted RAW(2000);
l_iv RAW(16) := UTL_RAW.cast_to_raw('0123456789ABCDEF');
BEGIN
l_encrypted := DBMS_CRYPTO.encrypt(
UTL_RAW.cast_to_raw(p_data),
DBMS_CRYPTO.ALG_AES_256_CBC_PKCS5,
UTL_RAW.cast_to_raw(p_key),
l_iv
);
RETURN l_encrypted;
END;
```
4. 创建解密过程
```
CREATE OR REPLACE FUNCTION decrypt_data (p_key IN VARCHAR2, p_data IN RAW)
RETURN CLOB
IS
l_decrypted CLOB;
l_iv RAW(16) := UTL_RAW.cast_to_raw('0123456789ABCDEF');
BEGIN
l_decrypted := UTL_RAW.cast_to_clob(
DBMS_CRYPTO.decrypt(
p_data,
DBMS_CRYPTO.ALG_AES_256_CBC_PKCS5,
UTL_RAW.cast_to_raw(p_key),
l_iv
)
);
RETURN l_decrypted;
END;
```
5. 查询加密数据
```
SELECT id, RAWTOHEX(encrypt_data('mykey', data)) AS encrypted_data
FROM test_table;
```
6. 查询解密数据
```
SELECT id, decrypt_data('mykey', HEXTORAW(encrypted_data)) AS decrypted_data
FROM (
SELECT id, RAWTOHEX(encrypt_data('mykey', data)) AS encrypted_data
FROM test_table
);
```
注意:在实际使用中,需要根据具体场景选择合适的加密算法和密钥长度。此示例仅供参考。