嘗試使用AES128算法加密樣本數據,在
Android和iOS中使用CBC和PKCS7填充,但結果不同:(
Android代碼：
private static final byte[] KEY = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10};
int srcBuffSiz = 1024;
byte[] srcBuff = new byte[srcBuffSiz];
Arrays.fill(srcBuff, (byte)0x01);
SecretKeySpec skeySpec = new SecretKeySpec(KEY, "AES");
Cipher ecipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
ecipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] dstBuff = ecipher.doFinal(srcBuff);
int bytesEncrypted = dstBuff.length;
iOS代碼：
// Source buffer
size_t srcBuffSiz = 1024;
unsigned char* srcBuff = new unsigned char[srcBuffSiz];
memset(srcBuff, 0x01, srcBuffSiz);
// Destination buffer
size_t dstBuffSiz = srcBuffSiz + 128;
unsigned char* dstBuff = new unsigned char[dstBuffSiz];
memset(dstBuff, 0x00, dstBuffSiz);
unsigned char keyPtr[kCCKeySizeAES128] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10};
size_t bytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding,
keyPtr, kCCKeySizeAES128,
NULL /* initialization vector (optional) */,
srcBuff, srcBuffSiz, /* input */
dstBuff, dstBuffSiz, /* output */
&bytesEncrypted);
因此,在這兩種情況下,我都試圖使用預定義的樣本密鑰加密樣本1024字節緩沖區(通常填充0x01值).
iOS中第一個和最后6個字節的加密緩沖區：
ED CC 64 27 A8 99 ... 0C 44 9F EC 34 FC
Android中第一個和最后一個6字節的加密緩沖區：
AE 65 A9 F7 7F 0E ... 1F BD AE 8B 85 ED
任何的想法？
如果我將Cipher.getInstance(“AES / CBC / PKCS7Padding”)替換為Cipher.getInstance(“AES”),那么加密緩沖區的前幾個字節將是相同的,但是從第17個字節開始……
iOS版：
ED CC 64 27 A8 99 DA 83 D5 4A B0 03 0F E7 DD A7 35 F2 50 5C 49 47 CC 3B 2F AB D1 61 05
安卓：
ED CC 64 27 A8 99 DA 83 D5 4A B0 03 0F E7 DD A7 ED CC 64 27 A8 99 DA 83 D5 4A B0 03 0F
