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(Swift 3,4,5...) HOTP Algorithm: HMAC-Based One-Time Password AlgorithmDemonstrates how to generate an HMAC one-time password (HOTP) as specified in RFC 4226. Note: This example requires Chilkat v9.5.0.77 or greater.
func chilkatTest() { // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. let crypt = CkoCrypt2()! // Duplicate the following results from RFC 4226 // Appendix D - HOTP Algorithm: Test Values // // The following test data uses the ASCII string // "12345678901234567890" for the secret: // // Secret = 0x3132333435363738393031323334353637383930 // // Truncated // Count Hexadecimal Decimal HOTP // 0 4c93cf18 1284755224 755224 // 1 41397eea 1094287082 287082 // 2 82fef30 137359152 359152 // 3 66ef7655 1726969429 969429 // 4 61c5938a 1640338314 338314 // 5 33c083d4 868254676 254676 // 6 7256c032 1918287922 287922 // 7 4e5b397 82162583 162583 // 8 2823443f 673399871 399871 // 9 2679dc69 645520489 520489 var secret: String? = "12345678901234567890" var count: Int for count = 0; count <= 9; count++ { var counterHex: String? = crypt.encodeInt(count, numBytes: 8, littleEndian: false, encoding: "hex") var hotp: String? = crypt.hotp(secret, secretEnc: "ascii", counterHex: counterHex, numDigits: 6, truncOffset: -1, hashAlg: "sha1") print("\(count) HOTP = \(hotp!)") } // Output is: // 0 HOTP = 755224 // 1 HOTP = 287082 // 2 HOTP = 359152 // 3 HOTP = 969429 // 4 HOTP = 338314 // 5 HOTP = 254676 // 6 HOTP = 287922 // 7 HOTP = 162583 // 8 HOTP = 399871 // 9 HOTP = 520489 } |
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