pl/sql:aes256加密解密

调用相应的API对BLOB数据 相应的加密和解密 PL/SQL 加密解密 --加密function encrypt_aes256 (p_blob in blob, p_key in varchar2) return blobas l_key_raw raw(32); l_returnvalue blob;begin /* Purpose: encrypt blob Remarks: p_key should be 32 charac

调用相应的API对BLOB数据 相应的加密和解密 PL/SQL 加密解密

--加密
function encrypt_aes256 (p_blob in blob,
                         p_key in varchar2) return blob
as
  l_key_raw                      raw(32);
  l_returnvalue                  blob;
begin
  /*
  Purpose:    encrypt blob
  Remarks:    p_key should be 32 characters (256 bits / 8 = 32 bytes)
  Who     Date        Description
  ------  ----------  -------------------------------------
  MBR     20.01.2011  Created
  */
  --获得 raw类型的key
  l_key_raw := utl_raw.cast_to_raw (p_key);
  
  dbms_lob.createtemporary (l_returnvalue, false);
  dbms_crypto.encrypt (l_returnvalue, p_blob, g_encryption_type_aes, l_key_raw);
  return l_returnvalue;
end encrypt_aes256;
--解密 
function decrypt_aes256 (p_blob in blob,
                         p_key in varchar2) return blob
as
  l_key_raw                      raw(32);
  l_returnvalue                  blob;
begin
  /*
  Purpose:    decrypt blob
  Remarks:    p_key should be 32 characters (256 bits / 8 = 32 bytes)
  Who     Date        Description
  ------  ----------  -------------------------------------
  MBR     20.01.2011  Created
  */
  l_key_raw := utl_raw.cast_to_raw (p_key);
  dbms_lob.createtemporary (l_returnvalue, false);
  dbms_crypto.decrypt (l_returnvalue, p_blob, g_encryption_type_aes, l_key_raw);
  return l_returnvalue;
end decrypt_aes256;