RSA key creation always nil












1















So I have a requirement where i have to encrypt Strings using RSA.



Have a look on this clipboardExample



So after doing some researching i have found this could be the right answer for my case.



After modifying the code to form this at the last stage.



 private func encrypt(with key: String) {
let serverPublicKey = key.data(using: .utf8)?.base64EncodedData()
guard let serverPublicKey2 = serverPublicKey else { return }
let data2 = Data(base64Encoded: serverPublicKey2)
guard let data = data2 else { return }
let keyDict:[NSObject:NSObject] = [
kSecAttrKeyType: kSecAttrKeyTypeRSA,
kSecAttrKeyClass: kSecAttrKeyClassPublic,
kSecAttrKeySizeInBits: NSNumber(value: 2048),
kSecReturnPersistentRef: true as NSObject
]
let publickeysi = SecKeyCreateWithData(data as CFData, keyDict as CFDictionary, nil)
guard let publicKeySi = publickeysi else { return }
//Encrypt a string with the public key
let message = "This is my message." // this field in bullet point one
let blockSize = SecKeyGetBlockSize(publicKeySi)
var messageEncrypted = [UInt8](repeating: 0, count: blockSize)
var messageEncryptedSize = blockSize
var status: OSStatus!
status = SecKeyEncrypt(publickeysi!, SecPadding.PKCS1, message, message.count, &messageEncrypted, &messageEncryptedSize)
if status != noErr {
print("Encryption Error!")
return
}
}



  • I Don't know what is message field stands for, and based on my requirement is this where i need to put my UUID / Pin & server PublicKey.

  • function escapes the closure at SecKeyCreateWithData as it's always returning nil, What am i missing.










share|improve this question



























    1















    So I have a requirement where i have to encrypt Strings using RSA.



    Have a look on this clipboardExample



    So after doing some researching i have found this could be the right answer for my case.



    After modifying the code to form this at the last stage.



     private func encrypt(with key: String) {
    let serverPublicKey = key.data(using: .utf8)?.base64EncodedData()
    guard let serverPublicKey2 = serverPublicKey else { return }
    let data2 = Data(base64Encoded: serverPublicKey2)
    guard let data = data2 else { return }
    let keyDict:[NSObject:NSObject] = [
    kSecAttrKeyType: kSecAttrKeyTypeRSA,
    kSecAttrKeyClass: kSecAttrKeyClassPublic,
    kSecAttrKeySizeInBits: NSNumber(value: 2048),
    kSecReturnPersistentRef: true as NSObject
    ]
    let publickeysi = SecKeyCreateWithData(data as CFData, keyDict as CFDictionary, nil)
    guard let publicKeySi = publickeysi else { return }
    //Encrypt a string with the public key
    let message = "This is my message." // this field in bullet point one
    let blockSize = SecKeyGetBlockSize(publicKeySi)
    var messageEncrypted = [UInt8](repeating: 0, count: blockSize)
    var messageEncryptedSize = blockSize
    var status: OSStatus!
    status = SecKeyEncrypt(publickeysi!, SecPadding.PKCS1, message, message.count, &messageEncrypted, &messageEncryptedSize)
    if status != noErr {
    print("Encryption Error!")
    return
    }
    }



    • I Don't know what is message field stands for, and based on my requirement is this where i need to put my UUID / Pin & server PublicKey.

    • function escapes the closure at SecKeyCreateWithData as it's always returning nil, What am i missing.










    share|improve this question

























      1












      1








      1








      So I have a requirement where i have to encrypt Strings using RSA.



      Have a look on this clipboardExample



      So after doing some researching i have found this could be the right answer for my case.



      After modifying the code to form this at the last stage.



       private func encrypt(with key: String) {
      let serverPublicKey = key.data(using: .utf8)?.base64EncodedData()
      guard let serverPublicKey2 = serverPublicKey else { return }
      let data2 = Data(base64Encoded: serverPublicKey2)
      guard let data = data2 else { return }
      let keyDict:[NSObject:NSObject] = [
      kSecAttrKeyType: kSecAttrKeyTypeRSA,
      kSecAttrKeyClass: kSecAttrKeyClassPublic,
      kSecAttrKeySizeInBits: NSNumber(value: 2048),
      kSecReturnPersistentRef: true as NSObject
      ]
      let publickeysi = SecKeyCreateWithData(data as CFData, keyDict as CFDictionary, nil)
      guard let publicKeySi = publickeysi else { return }
      //Encrypt a string with the public key
      let message = "This is my message." // this field in bullet point one
      let blockSize = SecKeyGetBlockSize(publicKeySi)
      var messageEncrypted = [UInt8](repeating: 0, count: blockSize)
      var messageEncryptedSize = blockSize
      var status: OSStatus!
      status = SecKeyEncrypt(publickeysi!, SecPadding.PKCS1, message, message.count, &messageEncrypted, &messageEncryptedSize)
      if status != noErr {
      print("Encryption Error!")
      return
      }
      }



      • I Don't know what is message field stands for, and based on my requirement is this where i need to put my UUID / Pin & server PublicKey.

      • function escapes the closure at SecKeyCreateWithData as it's always returning nil, What am i missing.










      share|improve this question














      So I have a requirement where i have to encrypt Strings using RSA.



      Have a look on this clipboardExample



      So after doing some researching i have found this could be the right answer for my case.



      After modifying the code to form this at the last stage.



       private func encrypt(with key: String) {
      let serverPublicKey = key.data(using: .utf8)?.base64EncodedData()
      guard let serverPublicKey2 = serverPublicKey else { return }
      let data2 = Data(base64Encoded: serverPublicKey2)
      guard let data = data2 else { return }
      let keyDict:[NSObject:NSObject] = [
      kSecAttrKeyType: kSecAttrKeyTypeRSA,
      kSecAttrKeyClass: kSecAttrKeyClassPublic,
      kSecAttrKeySizeInBits: NSNumber(value: 2048),
      kSecReturnPersistentRef: true as NSObject
      ]
      let publickeysi = SecKeyCreateWithData(data as CFData, keyDict as CFDictionary, nil)
      guard let publicKeySi = publickeysi else { return }
      //Encrypt a string with the public key
      let message = "This is my message." // this field in bullet point one
      let blockSize = SecKeyGetBlockSize(publicKeySi)
      var messageEncrypted = [UInt8](repeating: 0, count: blockSize)
      var messageEncryptedSize = blockSize
      var status: OSStatus!
      status = SecKeyEncrypt(publickeysi!, SecPadding.PKCS1, message, message.count, &messageEncrypted, &messageEncryptedSize)
      if status != noErr {
      print("Encryption Error!")
      return
      }
      }



      • I Don't know what is message field stands for, and based on my requirement is this where i need to put my UUID / Pin & server PublicKey.

      • function escapes the closure at SecKeyCreateWithData as it's always returning nil, What am i missing.







      ios swift encryption rsa






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      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 3 at 7:52









      Mohmmad SMohmmad S

      2,4752523




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