Swift

Load RSA Public Key from Hex Modulus and Exponent

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Load an RSA public key from a hex modulus and exponent. Swift

func chilkatTest() {
    var success: Bool = false

    // Load a 128-byte (1024-bit) modulus + exponent into a Chilkat public key object..
    var modulus: String? = "BF5F4AF9A018B5F324A0C10448C0D3248D9BE78967FDC551A27876AC5789ADCBA8245D3D942AE3799563D895DA801E765D225A54FA15DAB2C4731DD817DCF94A9AD62197074C2349442093A206234BF3747F0E88AA6F538355684CC1FB26FCE029C9050A1DAF9F507C2BABF6EFC9FB16320C8036721BE0279FBB76122C41E429"

    var exponent: String? = "00000003"

    // We'll need to re-encode from hex to base64..
    let bdModulus = CkoBinData()!
    bdModulus.appendEncoded(encData: modulus, encoding: "hex")
    let bdExponent = CkoBinData()!
    bdExponent.appendEncoded(encData: exponent, encoding: "hex")

    let xml = CkoXml()!
    xml.tag = "RsaKeyValue"
    xml.newChild2(tagPath: "Modulus", content: bdModulus.getEncoded(encoding: "base64"))
    xml.newChild2(tagPath: "Exponent", content: bdExponent.getEncoded(encoding: "base64"))

    // Now load into the pubkey object..
    let pubkey = CkoPublicKey()!
    success = pubkey.load(fromString: xml.getXml())
    if success == false {
        print("\(pubkey.lastErrorText!)")
        return
    }

    print("Success.")

}