create a saml contract in swift

Here's an example to create a SAML contract in Swift:

main.swift
import Foundation
import SWXMLHash

struct SamlContract {
    var idpUrl: String
    var spUrl: String
    var assertionConsumerServiceUrl: String
    var issuer: String
    var audience: String
    
    func samlRequest() -> String {
        // construct SAML request
        let timestamp = Int(Date().timeIntervalSince1970)
        let samlRequestXml = """
            <samlp:AuthnRequest xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" ID="test-request-id" Version="2.0" IssueInstant="\(timestamp)" AssertionConsumerServiceURL="\(assertionConsumerServiceUrl)" Destination="\(idpUrl)">
                <saml:Issuer>\(issuer)</saml:Issuer>
                <samlp:NameIDPolicy Format="urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified" AllowCreate="true"></samlp:NameIDPolicy>
            </samlp:AuthnRequest>
            """
        // encode to base64
        let samlRequestData = samlRequestXml.data(using: .utf8)!
        let base64EncodedSamlRequest = samlRequestData.base64EncodedString()
        // return final SAML request URL
        return "\(idpUrl)?SAMLRequest=\(base64EncodedSamlRequest)&RelayState=\(spUrl.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)!)"
    }
}

let samlContract = SamlContract(idpUrl: "https://example.com/idp", spUrl: "https://example.com/sp", assertionConsumerServiceUrl: "https://example.com/sp/consumer", issuer: "https://example.com/sp", audience: "https://example.com/idp")
let samlRequestUrl = samlContract.samlRequest()
print(samlRequestUrl)
1561 chars
31 lines

In this example, we define a SamlContract struct with properties for the IdP and SP URLs, the assertion consumer service URL, the issuer, and the audience. We then define a samlRequest() function that constructs a SAML request XML document using the SWXMLHash library and encodes it to base64. The SAML request URL is then returned with the base64-encoded SAML request and the SP URL as the relay state.

Note that this is just one example of how to create a SAML contract in Swift, and the exact implementation may vary based on your specific requirements and environment. Also, be sure to follow best practices for SAML security, such as using TLS/SSL and properly configuring SAML metadata.

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