rsa_encrypt.swift

func encrypt(data: NSData) -> NSData {
    var error: Unmanaged<CFErrorRef>? = nil

    let parameters: [NSString: NSString] = [
        kSecAttrKeyType: kSecAttrKeyTypeRSA,
        kSecAttrKeyClass: kSecAttrKeyClassPublic
    ]
    
    let keyString = "MIGeMA0GCSqGSIb3DQEBAQUAA4GMADCBiAKBgQCVXkvZifORfS8VVEp+BQTrnXu2a2+KL+Rw5FPHeSAOXjrS5DoC0GxK29jTKPGkJrg2WOiL/ZSbKvTq8wBUZzoUGaJQ+kzBJ40ShVtbJYGNFixubuKrSjUNQB149t25lxHnJia0i9i1sLfzrPnqPJ4ABf7lnhkTbNt8g/KriwoqmQICAQE="
    let keyData = NSData(base64EncodedString: keyString, options: .IgnoreUnknownCharacters)!

    let cryptoKey = SecKeyCreateFromData(parameters as CFDictionary, keyData as CFData , &error)!
    
    let encrypt = SecEncryptTransformCreate(cryptoKey, &error);
    
    SecTransformSetAttribute(encrypt, kSecTransformInputAttributeName, data, &error)
    
    let encryptedData = SecTransformExecute(encrypt, &error)

    return encryptedData as! NSData
}