交易签名

为了系统安全的目的，在发送交易请求时，您需要将此参数添加到header：

标头	内容
Content-Type	text/plain
X-Transaction-Signature	{transaction_signature}

所需参数

1. Transaction Secret: 商户后台取得（API 对接 -> QR Ph交易密钥）
2. Request Body: 交易请求内容

生成步骤

1. 使用 HMAC 算法，对 Request Body 以 Transaction Secret 作为密钥进行签名（hash）
2. 使用 base64 编码签名的结果。

PHP

function transcation_signature(string $request_body, string $transaction_secret): string
{
    return base64_encode(hash_hmac('sha256', $request_body, $transaction_secret, true));
}

JAVA

public static String transactionSignature(String requestBody, String transactionSecret) {
    try {
        Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
        SecretKeySpec secretKey = new SecretKeySpec(transactionSecret.getBytes(StandardCharsets.UTF_8), "HmacSHA256");
        sha256_HMAC.init(secretKey);

        byte[] hashBytes = sha256_HMAC.doFinal(requestBody.getBytes(StandardCharsets.UTF_8));

        String signature = Base64.getEncoder().encodeToString(hashBytes);

        return signature;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

PYTHON

def transaction_signature(request_body, transaction_secret):
    request_body_bytes = bytes(request_body, 'utf-8')
    transaction_secret_bytes = bytes(transaction_secret, 'utf-8')

    hash_object = hmac.new(transaction_secret_bytes, request_body_bytes, hashlib.sha256)

    raw_signature = hash_object.digest()

    signature = base64.b64encode(raw_signature).decode('utf-8')

    return signature