デジタル署名付きスウィフト記号文字列

Question

私はプライベートデジタル署名（パスワードを持つ）で文字列（rawまたはbase64エンコード）に署名する必要があるプロジェクトを持っています。インターネットで検索した結果、私的デジタル証明書がx.509形式（RSA）であることが判明しました。 xcodeでは、UIFileSharingEnabledをEnabledに設定し、Itunesを使用してそのrsa.p12証明書をアップロードしました。次に、ドキュメントディレクトリから（データまたは文字列）形式の証明書を取得します。私の質問は、どのように私はデジタル署名を使用して任意のテキストを暗号化できますか？ 私はこのライブラリhttps://github.com/TakeScoop/SwiftyRSA/issuesを使用しようとしましたが、このlibはx.509証明書をサポートしていません。

Answer 1

私は単なる文字列のテキストをコード化し、それがUも機能を必要とする

func signRequestorId(requestorID: String) -> String? { 

    let name = "RSA256_4f1826090c554a439c419043270d40f7d.p12" 
    guard let certificateData = CustomFileManager.getFile(by: name) else { 
     return nil 
    } 

    var status: OSStatus 

    let certificateKey = "123456" 
    let options = [kSecImportExportPassphrase as String : certificateKey] 

    var optItems: CFArray? 
    status = SecPKCS12Import(certificateData as CFData, options as CFDictionary, &optItems) 
    if status != errSecSuccess { 
     print("Cannot sign the device id info: failed importing keystore.") 
     return nil 
    } 
    guard let items = optItems else { 
     return nil 
    } 

    // Cast CFArrayRef to Swift Array 
    let itemsArray = items as [AnyObject] 
    // Cast CFDictionaryRef as Swift Dictionary 
    guard let myIdentityAndTrust = itemsArray.first as? [String : AnyObject] else { 
     return nil 
    } 

    // Get our SecIdentityRef from the PKCS #12 blob 
    let outIdentity = myIdentityAndTrust[kSecImportItemIdentity as String] as! SecIdentity 
    var myReturnedCertificate: SecCertificate? 
    status = SecIdentityCopyCertificate(outIdentity, &myReturnedCertificate) 
    if status != errSecSuccess { 
     print("Failed to retrieve the certificate associated with the requested identity.") 
     return nil 
    } 

    // Get the private key associated with our identity 
    var optPrivateKey: SecKey? 
    status = SecIdentityCopyPrivateKey(outIdentity, &optPrivateKey) 
    if status != errSecSuccess { 
     print("Failed to extract the private key from the keystore.") 
     return nil 
    } 
    // Unwrap privateKey from optional SecKeyRef 
    guard let privateKey = optPrivateKey else { 
     return nil 
    } 

    // Retrieve the digital signature and sign the requestor 

    // Get the maximum size of the digital signature 
    var signedBytesSize: size_t = SecKeyGetBlockSize(privateKey) 
    var signedBytes: UnsafeMutablePointer<UInt8> 

    // alloc a buffer to hold the signature 
    signedBytes = UnsafeMutablePointer<UInt8>.allocate(capacity: signedBytesSize) 
    memset(signedBytes, 0x0, signedBytesSize) 
    // We're calling alloc here, so we need to destroy and deinit 
    defer { 
     signedBytes.deinitialize() 
     signedBytes.deallocate(capacity: signedBytesSize) 
    } 

    // Sign data 
    let requestorData = requestorID.data(using: String.Encoding.utf8)! 
    // Generate a digital signature for our requestor from our cert 
    let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: requestorData.count) 
    let stream = OutputStream(toBuffer: buffer, capacity: requestorData.count) 

    stream.open() 
    requestorData.withUnsafeBytes({ (p: UnsafePointer<UInt8>) -> Void in 
     stream.write(p, maxLength: requestorData.count) 
    }) 

    stream.close() 

    let weidformat = UnsafePointer<UInt8>(buffer) 

    status = SecKeyRawSign(privateKey, .PKCS1, weidformat, 
          requestorData.count, signedBytes, &signedBytesSize) 

    if status != errSecSuccess { 
     print("Cannot sign the device id info: failed obtaining the signed bytes.") 
     return nil 
    } 

    let encryptedBytes = NSData(bytes: signedBytes, length: signedBytesSize) 
    let signedRequestorId = encryptedBytes.base64EncodedString(options: []) 

    print(signedRequestorId) 
    return signedRequestorId 
} 

は名前

static func getFile(by name: String)-> Data?{ 
    let documentsUrl = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first 
    let destinationUrl = documentsUrl!.appendingPathComponent("\(name)") 

    let isFileFound = FileManager.default.fileExists(atPath: destinationUrl.path) 
    if isFileFound { 
     let documentContent = FileManager.default.contents(atPath: destinationUrl.path) 
     return documentContent 
    } 
    return nil 
} 
enter code here