I want to transform this JavaScript HMAC code to Swift using CryptoSwift library.
var crypto = require("crypto");
var currentDate = Moment.utc().format("YYYYMMDDHH");
var hmac = crypto.createHmac("sha256", "secretTokenKey123");
hmac.update(currentDate);
var code = hmac.digest("hex").toUpperCase();
What is the best way to do that?
This is what I tried, but did not return the correct code:
let formatter = DateFormatter()
formatter.dateFormat = "yyyyMMddHH"
let dateString = formatter.string(from: Date())
let baseString = secretToken + dateString
print(baseString.sha256().uppercased())
I also tried this, but it returns the same wrong code
var digest = SHA2(variant: .sha256)
var bytes: Array<UInt8>?
do {
_ = try digest.update(withBytes: secretToken.bytes)
_ = try digest.update(withBytes: dateString.bytes)
bytes = try digest.finish()
} catch {}
if let result = bytes?.toHexString().uppercased() {
print(result)
}
I also tried to use HMCA from CryptoSwift directly. But I do not know what message I need to authenticate:
HMAC(key: secretToken.bytes, variant: .sha256).authenticate(???)
我自己发现了解决方案:
HMAC(key: secretToken.bytes, variant: .sha256).authenticate(dateString.bytes).toHexString().uppercased()
HAMC SHA256 in Common Crypto
func hmacSHA256(message:Data, key:Data) -> Data {
var macData = Data(count: Int(CC_SHA256_DIGEST_LENGTH))
macData.withUnsafeMutableBytes {macBytes in
message.withUnsafeBytes {messageBytes in
key.withUnsafeBytes {keyBytes in
CCHmac(CCHmacAlgorithm(kCCHmacAlgSHA256),
keyBytes, key.count,
messageBytes, message.count,
macBytes)
}
}
}
return macData
}
let clearData = "clearData0123456".data(using:.utf8)!
let keyData = "keyData8901234562".data(using:.utf8)!
let hmacData = hmacSHA256(message:clearData, key:keyData)
print("hmacData: \(String(describing: hmacData as NSData))")
hmacData: fcc487ce7dc1115a69a37dc3710610a87ad2fc9c85e2e0a52f0e7ee1dc9407c1
Note:
Include #import <CommonCrypto/CommonCrypto.h>
in a bridging header.
Add Security.framework
to the project
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