我这几天都在研究这个问题。
我们的后端有一个使用PHP完成的签名检查:
private $HMAC_ALGO = 'md5';
public function decodeAndValidateMessage($data,$signature,$secretkey) {
if (!is_string($data)) {
throw new InvalidRequestException($data);
}
$decodedData = base64_decode($data);
// if not json returned the throw exception...
$jsonDecoded = json_decode($decodedData,true);
if (!$jsonDecoded) {
throw new InvalidRequestException($decodedData);
}
// validate
$signatureRef = base64_encode(hash_hmac($this->HMAC_ALGO,$decodedData,$secretkey,true));
if ($signature === $signatureRef) {
return $jsonDecoded;
} else {
throw new InvalidSignatureException();
}
}
我在iOS上工作了:
func hmac(_ algorithm: HMACAlgorithm, key: String) -> String {
let cKey = key.cString(using: String.Encoding.utf8)
let cData = self.cString(using: String.Encoding.utf8)
var result = [CUnsignedChar](repeating: 0, count: Int(algorithm.digestLength()))
CCHmac(algorithm.toCCHmacAlgorithm(), cKey!, Int(strlen(cKey!)), cData!, Int(strlen(cData!)), &result)
let hmacData:Data = Data(bytes: UnsafePointer<UInt8>(result), count: (Int(algorithm.digestLength())))
let hmacBase64 = hmacData.base64EncodedString(options: NSData.Base64EncodingOptions(rawValue: 0))
print(String(hmacBase64))
return String(hmacBase64)
}
在Kotlin / Android上做这个的任何想法/帮助?我被卡在InvalidSignatureException
错误。
fun generateSignature(data : HashMap<String, Any>) : String {
val hmac = Mac.getInstance("HmacMD5")
hmac.init(SecretKeySpec(Constant.PRIVATEKEY.toByteArray(Charsets.UTF_8), hmac.algorithm))
return Base64.encodeToString(data.toString().toByteArray(),Base64.URL_SAFE + Base64.NO_PADDING + Base64.NO_CLOSE + Base64.NO_WRAP)
}
谢谢:D我真的很感激任何帮助:D
更新:
只是为了让我的问题更简单?
是否可以将iOS代码行转换为Kotlin?
枚举HMACAlgorithm {
case md5, sha1, sha224, sha256, sha384, sha512
func toCCHmacAlgorithm() -> CCHmacAlgorithm {
var result: Int = 0
switch self {
case .md5:
result = kCCHmacAlgMD5
case .sha1:
result = kCCHmacAlgSHA1
case .sha224:
result = kCCHmacAlgSHA224
case .sha256:
result = kCCHmacAlgSHA256
case .sha384:
result = kCCHmacAlgSHA384
case .sha512:
result = kCCHmacAlgSHA512
}
return CCHmacAlgorithm(result)
}
func digestLength() -> Int {
var result: CInt = 0
switch self {
case .md5:
result = CC_MD5_DIGEST_LENGTH
case .sha1:
result = CC_SHA1_DIGEST_LENGTH
case .sha224:
result = CC_SHA224_DIGEST_LENGTH
case .sha256:
result = CC_SHA256_DIGEST_LENGTH
case .sha384:
result = CC_SHA384_DIGEST_LENGTH
case .sha512:
result = CC_SHA512_DIGEST_LENGTH
}
return Int(result)
}
}
这就是我调用函数的方式
var params:字典
params.generateSignature()
fun generateSignature(data:HashMap):String {val hmac = Mac.getInstance(“HmacMD5”)hmac.init(SecretKeySpec(Constant.PRIVATEKEY.toByteArray(Charsets.UTF_8),hmac.algorithm))返回Base64.encodeToString(数据。 toString()。toByteArray(),Base64.URL_SAFE + Base64.NO_PADDING + Base64.NO_CLOSE + Base64.NO_WRAP)}
有人终于找到了答案。
我的错误是hashmap应该在JSONObject下运行
加载对象= json对象(数据)
并使用obj.toString():D