Requires AES Compatible Encryption / Decryption Code for iPhone, Android, Windows / XP

Question

I need to send secure information to various Windows phones. I am new to the development of iPhone and Android, but you need to create a convenient application for each environment. It would be nice to interact with the received SMS text messages. I would like to get AES 256 encryption code for iPhone, Android and Windows XP (and above).

thank

Murray

Answer 1

AES-:
1. . , .
2. Random IV ( ) . .
- AES #, iOS Android, Github. - https://github.com/Pakhee/Cross-platform-AES-encryption

Answer 2

iPhone AESCrypt-ObjC, Android :

public class AESCrypt {

private final Cipher cipher;
private final SecretKeySpec key;
private AlgorithmParameterSpec spec;


public AESCrypt(String password) throws Exception
{
    // hash password with SHA-256 and crop the output to 128-bit for key
    MessageDigest digest = MessageDigest.getInstance("SHA-256");
    digest.update(password.getBytes("UTF-8"));
    byte[] keyBytes = new byte[32];
    System.arraycopy(digest.digest(), 0, keyBytes, 0, keyBytes.length);

    cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
    key = new SecretKeySpec(keyBytes, "AES");
    spec = getIV();
}       

public AlgorithmParameterSpec getIV()
{
    byte[] iv = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, };
    IvParameterSpec ivParameterSpec;
    ivParameterSpec = new IvParameterSpec(iv);

    return ivParameterSpec;
}

public String encrypt(String plainText) throws Exception
{
    cipher.init(Cipher.ENCRYPT_MODE, key, spec);
    byte[] encrypted = cipher.doFinal(plainText.getBytes("UTF-8"));
    String encryptedText = new String(Base64.encode(encrypted, Base64.DEFAULT), "UTF-8");

    return encryptedText;
}

public String decrypt(String cryptedText) throws Exception
{
    cipher.init(Cipher.DECRYPT_MODE, key, spec);
    byte[] bytes = Base64.decode(cryptedText, Base64.DEFAULT);
    byte[] decrypted = cipher.doFinal(bytes);
    String decryptedText = new String(decrypted, "UTF-8");

    return decryptedText;
}

}

Answer 3

, iPhone Android . . iPhone Android. , , .

, , iPhone Android, .

Answer 4

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, Windows .

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iPhone

, SDK. .

Android

.

• BouncyCastle Java
• javax.crypto.

, .

Windows.

• There are tons! For C # and C ++ and almost all other languages.

Also pay attention to my answer for a similar question.

You should definitely study cryptography before embedding them in your program. It would be very simple to use the built-in functions, but if you do not know what you are doing, you give yourself a false sense of security and may have compromised your customer data.