我需要在 c++ 中对一些数据进行编码并在 php 中对其进行解码,但是 php 没有正确解码。我检查了用相同的密钥和 iv 对同一消息进行编码,结果之间存在差异。这是我的代码:
struct ctr_state
{
unsigned char ivec[AES_BLOCK_SIZE];
unsigned int num;
unsigned char ecount[AES_BLOCK_SIZE];
};
unsigned char indata[AES_BLOCK_SIZE];
unsigned char outdata[AES_BLOCK_SIZE];
unsigned char iv[AES_BLOCK_SIZE];
struct ctr_state state;
int init_ctr(struct ctr_state *state, const byte iv[16])
{
/* aes_ctr128_encrypt requires 'num' and 'ecount' set to zero on the
* first call. */
state->num = 0;
memset(state->ecount, 0, AES_BLOCK_SIZE);
/* Initialise counter in 'ivec' to 0 */
memset(state->ivec + 8, 0, 8);
/* Copy IV into 'ivec' */
memcpy(state->ivec, iv, 8);
}
void aes_encoder(byte *read, byte *write, int size, byte *enc_key, byte *iv)
{
AES_KEY key;
if (AES_set_encrypt_key(enc_key, 128, &key) < 0)
{
Logger::getInstance()->Error("problem with setting encrypt key");
}
init_ctr(&state, iv);
AES_ctr128_encrypt(read, write, size, &key, state.ivec, state.ecount, &state.num);
}
byte *key = (byte*)"2123456789012345";
byte *iv = (byte*)"2asdasdasdasdasd";
QByteArray message = "this is message";
byte *data = reinterpret_cast<byte *>(message.data());
aes_encoder(data, data, message.size(), key, iv);
qDebug() << message.toBase64();
结果是:“hF/nlW4e+FmuF8Bfny9M”
和php代码:
<?php
$message = "this is message";
$key = "2123456789012345";
$iv = "2asdasdasdasdasd";
$encrypted = openssl_encrypt($message, 'aes-128-ctr', $key, true, $iv);
echo base64_encode($encrypted);
结果:“RLLUkP54El9FCeWpO/bI”
为什么结果不一样?