我正在使用Android应用程序中的AES/CBC/PKCS5Padding。 代码类似于 -
private static String TRANSFORMATION = "AES/CBC/PKCS5Padding";
private static String ALGORITHM = "AES";
private static String DIGEST = "MD5";
private static Cipher cipher;
private static SecretKey password;
private static IvParameterSpec IVParamSpec;
private final static String pvtkey="GDNBCGDRFSC$%#%=";
//16-byte private key
private static byte[] IV = pvtkey.getBytes();
public PassWordEncryptor() {
try {
//Encode digest
MessageDigest digest;
digest = MessageDigest.getInstance(DIGEST);
password = new SecretKeySpec(digest.digest(pvtkey.getBytes()), ALGORITHM);
//Initialize objects
cipher = Cipher.getInstance(TRANSFORMATION);
IVParamSpec = new IvParameterSpec(IV);
} catch (NoSuchAlgorithmException e) {
Log.i(Lams4gApp.TAG, "No such algorithm " + ALGORITHM);
} catch (NoSuchPaddingException e) {
System.out.println( "No such padding PKCS7"+ e);
}
}
/**
Encryptor.
@text String to be encrypted
@return Base64 encrypted text
*/
public String encrypt(byte[] text) {
byte[] encryptedData;
try {
cipher.init(Cipher.ENCRYPT_MODE, password, IVParamSpec);
encryptedData = cipher.doFinal(text);
} catch (InvalidKeyException e) {
System.out.println( "Invalid key (invalid encoding, wrong length, uninitialized, etc)."+ e);
return null;
} catch (InvalidAlgorithmParameterException e) {
System.out.println( "Invalid or inappropriate algorithm parameters for " + ALGORITHM+ e);
return null;
} catch (IllegalBlockSizeException e) {
System.out.println( "The length of data provided to a block cipher is incorrect"+ e);
return null;
} catch (BadPaddingException e) {
System.out.println( "The input data but the data is not padded properly."+ e);
return null;
}
return Base64.encodeToString(encryptedData,Base64.DEFAULT);
}
我希望你能够提供iOS Objective C的类似代码。加密和解密结果应该与Android相同。请提供Objective C的相同算法。
我正在使用以下iOS代码-
- (void)viewDidLoad {
[super viewDidLoad];
NSData *encodingData=[self encrypt:[@"slapkh"
dataUsingEncoding:NSUTF8StringEncoding]];
NSString *encodingResult = [NSString base64StringFromData:encodingData length:[encodingData length]];
}
- (NSData *) encrypt:(NSData *) plainText {
return [self transform:kCCEncrypt data:plainText];
}
- (NSData *) decrypt:(NSData *) cipherText {
return [self transform:kCCDecrypt data:cipherText];
}
- (NSData *) transform:(CCOperation) encryptOrDecrypt data:(NSData *) inputData {
Cipher* cipher = [[Cipher alloc]initWithKey:@"GDNBCGDRFSC$%#%="];
NSString* Key = cipher.cipherKey;
// kCCKeySizeAES128 = 16 bytes
// CC_MD5_DIGEST_LENGTH = 16 bytes
NSData* secretKey = [Cipher md5:Key];
CCCryptorRef cryptor = NULL;
CCCryptorStatus status = kCCSuccess;
uint8_t iv[kCCBlockSizeAES128];
memset((void *) iv, 0x0, (size_t) sizeof(iv));
status = CCCryptorCreate(encryptOrDecrypt,
kCCAlgorithmAES128,kCCOptionPKCS7Padding,
[secretKey bytes], kCCKeySizeAES128, iv, &cryptor);
if (status != kCCSuccess) {
return nil;
}
size_t bufsize = CCCryptorGetOutputLength(cryptor, (size_t)[inputData length],
true);
void * buf = malloc(bufsize * sizeof(uint8_t));
memset(buf, 0x0, bufsize);
size_t bufused = 0;
size_t bytesTotal = 0;
status = CCCryptorUpdate(cryptor, [inputData bytes], (size_t)[inputData length],
buf, bufsize, &bufused);
if (status != kCCSuccess) {
free(buf);
CCCryptorRelease(cryptor);
return nil;
}
bytesTotal += bufused;
status = CCCryptorFinal(cryptor, buf + bufused, bufsize - bufused, &bufused);
if (status != kCCSuccess) {
free(buf);
CCCryptorRelease(cryptor);
return nil;
}
bytesTotal += bufused;
CCCryptorRelease(cryptor);
return [NSData dataWithBytesNoCopy:buf length:bytesTotal];
}
但是Android和iOS的结果不同，如下所示：
加密文本: slapkh 密钥: GDNBCGDRFSC$%#%=
Android结果：jN2p1yAdBJLRmoHq+k9KtA==\n
iOS结果：tbaSJFv5mGyZ9t/+kOw+gg==
pvtkey.getBytes()，但在iOS代码中，它只是零。 - Roman