Android、iOS和Java通用的AES128加密解密示例代码
投稿：daisy
现在很多App在与服务器接口的请求和响应过程中，为了安全都会涉及到加密和解密的问题，如果不加的话就会是明文的，即使加了GZIP也可以被直接解压成明文。如果同时有Android和IOS的App的话、必须要保证加密和解密的算法一致、不然后台没法处理，下面通过这篇文章学习下。
前言
移动端越来越火了，我们在开发过程中，总会碰到要和移动端打交道的场景，比如android和iOS的打交道。为了让数据交互更安全，我们需要对数据进行加密传输。
这篇文章给大家分享AES的加密和解密、Android和ios通用的AES加密算法、大家可以直接集成到自己的项目、服务器接口如果是用Java写的话、整个框架都完美了、如果是.NET编写的后台接口的话、得改造一下哦
IOS加密
/*加密方法*/
(NSString *)AES256EncryptWithPlainText:(NSString *)plain {
NSData *plainText = [plain dataUsingEncoding:NSUTF8StringEncoding];
// ´key´ should be 32 bytes for AES256, will be null-padded otherwise
char keyPtr[kCCKeySizeAES256 1]; // room for terminator (unused)
bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding)
NSUInteger dataLength = [plainText length];
size_t bufferSize = dataLength kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
bzero(buffer, sizeof(buffer));
size_t numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128,kCCOptionPKCS7Padding,
[[NSData AESKeyForPassword:PASSWORD] bytes], kCCKeySizeAES256,
ivBuff /* initialization vector (optional) */,
[plainText bytes], dataLength, /* input */
buffer, bufferSize, /* output */
&numBytesEncrypted);
if (cryptStatus == kCCSuccess) {
NSData *encryptData = [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
return [encryptData base64Encoding];
}
free(buffer); //free the buffer;
return nil;
}
IOS解密
/*解密方法*/
(NSString *)AES256DecryptWithCiphertext:(NSString *)ciphertexts{
NSData *cipherData = [NSData dataWithBase64EncodedString:ciphertexts];
// ´key´ should be 32 bytes for AES256, will be null-padded otherwise
char keyPtr[kCCKeySizeAES256 1]; // room for terminator (unused)
bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding)
NSUInteger dataLength = [cipherData length];
size_t bufferSize = dataLength kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesDecrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding,
[[NSData AESKeyForPassword:PASSWORD] bytes], kCCKeySizeAES256,
ivBuff ,/* initialization vector (optional) */
[cipherData bytes], dataLength, /* input */
buffer, bufferSize, /* output */
&numBytesDecrypted);
if (cryptStatus == kCCSuccess) {
NSData *encryptData = [NSData dataWithBytesNoCopy:buffer length:numBytesDecrypted];
return [[[NSString alloc] initWithData:encryptData encoding:NSUTF8StringEncoding] init];
}
free(buffer); //free the buffer;
return nil;
}
Android加密
private byte[] encrypt(String cmp, SecretKey sk, IvParameterSpec IV,
byte[] msg) {
try {
Cipher c = Cipher.getInstance(cmp);
c.init(Cipher.ENCRYPT_MODE, sk, IV);
return c.doFinal(msg);
} catch (NoSuchAlgorithmException nsae) {
Log.e("AESdemo", "no cipher getinstance support for " cmp);
} catch (NoSuchPaddingException nspe) {
Log.e("AESdemo", "no cipher getinstance support for padding " cmp);
} catch (InvalidKeyException e) {
Log.e("AESdemo", "invalid key exception");
} catch (InvalidAlgorithmParameterException e) {
Log.e("AESdemo", "invalid algorithm parameter exception");
} catch (IllegalBlockSizeException e) {
Log.e("AESdemo", "illegal block size exception");
} catch (BadPaddingException e) {
Log.e("AESdemo", "bad padding exception");
}
return null;
}
Android解密
private byte[] decrypt(String cmp, SecretKey sk, IvParameterSpec IV,
byte[] ciphertext) {
try {
Cipher c = Cipher.getInstance(cmp);
c.init(Cipher.DECRYPT_MODE, sk, IV);
return c.doFinal(ciphertext);
} catch (NoSuchAlgorithmException nsae) {
Log.e("AESdemo", "no cipher getinstance support for " cmp);
} catch (NoSuchPaddingException nspe) {
Log.e("AESdemo", "no cipher getinstance support for padding " cmp);
} catch (InvalidKeyException e) {
Log.e("AESdemo", "invalid key exception");
} catch (InvalidAlgorithmParameterException e) {
Log.e("AESdemo", "invalid algorithm parameter exception");
} catch (IllegalBlockSizeException e) {
Log.e("AESdemo", "illegal block size exception");
} catch (BadPaddingException e) {
Log.e("AESdemo", "bad padding exception");
e.printStackTrace();
}
return null;
}
总结
以上就是这篇文章的全部内容了，希望本文的内容对各位开发者们能有所帮助，如果有疑问大家可以留言交流。