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;

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