android 加密 密钥长度,AES加密:InvalidKeyException:密钥长度不是128/192/256位
我试图使用AES加密Android上的字符串。对称密钥先前是用Diffie-Hellman算法确定的,似乎没问题(密钥长度是128位,见下文)。不过,我得到一个InvalidKeyException: "Key length not 128/192/256 bits.“AES加密:InvalidKeyException:密钥长度不是128/192/256位代码:KeyAgreement keyAg
我试图使用AES加密Android上的字符串。对称密钥先前是用Diffie-Hellman算法确定的,似乎没问题(密钥长度是128位,见下文)。
不过,我得到一个InvalidKeyException: "Key length not 128/192/256 bits.“AES加密:InvalidKeyException:密钥长度不是128/192/256位
代码:
KeyAgreement keyAgree = KeyAgreement.getInstance("DH", "BC");
keyAgree.init(this.smartphonePrivKey);
keyAgree.doPhase(serverPubKey, true);
SecretKey key = keyAgree.generateSecret("AES");
System.out.println("Key Length: " + key.getEncoded().length);
System.out.println("Key Algorithm: "+ key.getAlgorithm());
System.out.println("Key Format: "+ key.getFormat());
byte[] encrypted = null;
Cipher cipher;
try {
cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
System.out.println("Allowed Key Length: "
+ cipher.getMaxAllowedKeyLength("AES"));
cipher.init(Cipher.ENCRYPT_MODE, key);
encrypted = cipher.doFinal("YEAH".getBytes("UTF8"));
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
上面的代码导致了以下的输出:
_12-10 20:24:53.119: INFO/System.out(757): Key Length: 128_
_12-10 20:24:53.119: INFO/System.out(757): Key Algorithm: AES_
_12-10 20:24:53.119: INFO/System.out(757): Key Format: RAW_
_12-10 20:24:53.470: INFO/System.out(757): Allowed Key Length: 2147483647_
在那之后,我得到InvalidKeyException: Key length not 128/192/256 bits.但正如你所看到的,SecretKey的长度为128位!
任何想法?
2010-12-10
Peter
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