AES指高级加密标准（Advanced Encryption Standard）,是当前最流行的一种密码算法，在web应用开发，特别是对外提供接口时经常会用到，下面是我整理的一套php与java通用的AES加密解密算法。
php版代码如下：
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<?php
class
CryptAES
{
protected
$cipher
= MCRYPT_RIJNDAEL_128;
protected
$mode
= MCRYPT_MODE_ECB;
protected
$pad_method
= NULL;
protected
$secret_key
=
''
;
protected
$iv
=
''
;
public
function
set_cipher(
$cipher
)
{
$this
->cipher =
$cipher
;
}
public
function
set_mode(
$mode
)
{
$this
->mode =
$mode
;
}
public
function
set_iv(
$iv
)
{
$this
->iv =
$iv
;
}
public
function
set_key(
$key
)
{
$this
->secret_key =
$key
;
}
public
function
require_pkcs5()
{
$this
->pad_method =
'pkcs5'
;
}
protected
function
pad_or_unpad(
$str
,
$ext
)
{
if
(
is_null
(
$this
->pad_method) )
{
return
$str
;
}
else
{
$func_name
=
__CLASS__
.
'::'
.
$this
->pad_method .
'_'
.
$ext
.
'pad'
;
if
(
is_callable
(
$func_name
) )
{
$size
= mcrypt_get_block_size(
$this
->cipher,
$this
->mode);
return
call_user_func(
$func_name
,
$str
,
$size
);
}
}
return
$str
;
}
protected
function
pad(
$str
)
{
return
$this
->pad_or_unpad(
$str
,
''
);
}
protected
function
unpad(
$str
)
{
return
$this
->pad_or_unpad(
$str
,
'un'
);
}
public
function
encrypt(
$str
)
{
$str
=
$this
->pad(
$str
);
$td
= mcrypt_module_open(
$this
->cipher,
''
,
$this
->mode,
''
);
if
(
empty
(
$this
->iv) )
{
$iv
= @mcrypt_create_iv(mcrypt_enc_get_iv_size(
$td
), MCRYPT_RAND);
}
else
{
$iv
=
$this
->iv;
}
mcrypt_generic_init(
$td
,
$this
->secret_key,
$iv
);
$cyper_text
= mcrypt_generic(
$td
,
$str
);
$rt
=
base64_encode
(
$cyper_text
);
//$rt = bin2hex($cyper_text);
mcrypt_generic_deinit(
$td
);
mcrypt_module_close(
$td
);
return
$rt
;
}
public
function
decrypt(
$str
){
$td
= mcrypt_module_open(
$this
->cipher,
''
,
$this
->mode,
''
);
if
(
empty
(
$this
->iv) )
{
$iv
= @mcrypt_create_iv(mcrypt_enc_get_iv_size(
$td
), MCRYPT_RAND);
}
else
{
$iv
=
$this
->iv;
}
mcrypt_generic_init(
$td
,
$this
->secret_key,
$iv
);
//$decrypted_text = mdecrypt_generic($td, self::hex2bin($str));
$decrypted_text
= mdecrypt_generic(
$td
,
base64_decode
(
$str
));
$rt
=
$decrypted_text
;
mcrypt_generic_deinit(
$td
);
mcrypt_module_close(
$td
);
return
$this
->unpad(
$rt
);
}
public
static
function
hex2bin(
$hexdata
) {
$bindata
=
''
;
$length
=
strlen
(
$hexdata
);
for
(
$i
=0;
$i
amp;<
$length
;
$i
+= 2)
{
$bindata
.=
chr
(hexdec(
substr
(
$hexdata
,
$i
, 2)));
}
return
$bindata
;
}
public
static
function
pkcs5_pad(
$text
,
$blocksize
)
{
$pad
=
$blocksize
- (
strlen
(
$text
) %
$blocksize
);
return
$text
.
str_repeat
(
chr
(
$pad
),
$pad
);
}
public
static
function
pkcs5_unpad(
$text
)
{
$pad
= ord(
$text
{
strlen
(
$text
) - 1});
if
(
$pad
>
strlen
(
$text
))
return
false;
if
(
strspn
(
$text
,
chr
(
$pad
),
strlen
(
$text
) -
$pad
) !=
$pad
)
return
false;
return
substr
(
$text
, 0, -1 *
$pad
);
}
}
$keyStr
=
'UITN25LMUQC436IM'
;
$plainText
=
'this is a string will be AES_Encrypt'
;
$aes
=
new
CryptAES();
$aes
->set_key(
$keyStr
);
$aes
->require_pkcs5();
$encText
=
$aes
->encrypt(
$plainText
);
$decString
=
$aes
->decrypt(
$encText
);
echo
$encText
,
"n"
,
$decString
;
?>
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运行结果：
fhTD0NNIzv4jUEhJuC1htFFXJ/4S/rL6tDCJPiNvJ8mVLHWOD0HWweuxHynxoZf9
this is a string will be AES_Encrypt
java版代码如下：
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import
java.security.Key;
import
javax.crypto.Cipher;
import
javax.crypto.spec.SecretKeySpec;
import
org.apache.commons.codec.binary.Base64;
public
class
CryptAES {
private
static
final
String AESTYPE =
"AES/ECB/PKCS5Padding"
;
public
static
String AES_Encrypt(String keyStr, String plainText) {
byte
[] encrypt =
null
;
try
{
Key key = generateKey(keyStr);
Cipher cipher = Cipher.getInstance(AESTYPE);
cipher.init(Cipher.ENCRYPT_MODE, key);
encrypt = cipher.doFinal(plainText.getBytes());
}
catch
(Exception e){
e.printStackTrace();
}
return
new
String(Base64.encodeBase64(encrypt));
}
public
static
String AES_Decrypt(String keyStr, String encryptData) {
byte
[] decrypt =
null
;
try
{
Key key = generateKey(keyStr);
Cipher cipher = Cipher.getInstance(AESTYPE);
cipher.init(Cipher.DECRYPT_MODE, key);
decrypt = cipher.doFinal(Base64.decodeBase64(encryptData));
}
catch
(Exception e){
e.printStackTrace();
}
return
new
String(decrypt).trim();
}
private
static
Key generateKey(String key)
throws
Exception{
try
{
SecretKeySpec keySpec =
new
SecretKeySpec(key.getBytes(),
"AES"
);
return
keySpec;
}
catch
(Exception e){
e.printStackTrace();
throw
e;
}
}
public
static
void
main(String[] args) {
String keyStr =
"UITN25LMUQC436IM"
;
String plainText =
"this is a string will be AES_Encrypt"
;
String encText = AES_Encrypt(keyStr, plainText);
String decString = AES_Decrypt(keyStr, encText);
System.out.println(encText);
System.out.println(decString);
}
}
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运行结果：
fhTD0NNIzv4jUEhJuC1htFFXJ/4S/rL6tDCJPiNvJ8mVLHWOD0HWweuxHynxoZf9
this is a string will be AES_Encrypt