(Swift) Example: Mime.GetDecryptCertInfo method

Demonstrates the GetDecryptCertInfo method.

Note: This example requires Chilkat v11.4.0 or greater.

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    var success: Bool = false

    let mime = CkoMime()!

    // Load MIME that is has Content-Type like this:
    // Content-Type: application/pkcs7-mime; smime-type="enveloped-data"; name="smime.p7m"; smime-type="enveloped-data"
    success = mime.loadFile("qa_data/mime/enveloped_data.eml")
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    // Get information about the certificate that would be needed to decrypt.
    // An enveloped-data can potentially be decrypted by multiple certificates if it was encrypted in a way that allows it,
    // but in most cases, only a single certificate with associated private key (that of the message recipient) is possible.
    let json = CkoJsonObject()!
    success = mime.getDecryptCertInfo(json)
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    json.emitCompact = false
    print("\(json.emit()!)")

    // Sample output:

    // {
    //   "recipientInfo": [
    //     {
    //       "serial": "****",
    //       "issuerCN": "****"
    //     }
    //   ]
    // }

    // Get each certificate's information like this:
    var serial: String?
    var issuerCN: String?

    var i: Int = 0
    var count: Int = json.size(ofArray: "recipientInfo").intValue
    while i < count {
        json.i = i
        serial = json.string(of: "recipientInfo[i].serial")
        issuerCN = json.string(of: "recipientInfo[i].issuerCN")
        i = i + 1
    }


}