digitalleaves / asymmetriccrypto Goto Github PK

Asymmetric cryptography in Swift

License: MIT License

Swift 99.44% Objective-C 0.56%

asymmetriccrypto's Introduction

AsymmetricCryptoManager

AsymmetricCryptoManager is a Swift implementation of an asymmetric cryptography manager to facilitate the use of asymmetric cryptographic operations in Swift. Included is a sample view controller for testing purposes.

Usage

AsymmetricCryptoManager follows the Singleton pattern, thus it must be accessed by means of the sharedInstance variable.

Generating a key pair

AsymmetricCryptoManager.sharedInstance.createSecureKeyPair({ (success, error) -> Void in
  if success {
    // start using the key pair.
  } else { 
    // handle the error
  }
})

Encryption:

AsymmetricCryptoManager.sharedInstance.encryptMessageWithPublicKey(clearText) { (success, data, error) -> Void in
  if success {
    let b64encoded = data!.base64EncodedStringWithOptions([])
    // transmit b64encoded encrypted string.
  } else { 
    // handle the error ...
  }
}

Decryption:

AsymmetricCryptoManager.sharedInstance.decryptMessageWithPrivateKey(encryptedData) { (success, result, error) -> Void in
  if success {
    // manage the resulting string.  
  } else {
    // manage the error
  }

Sign a message:

AsymmetricCryptoManager.sharedInstance.signMessageWithPrivateKey(clearText) { (success, data, error) -> Void in
  if success {
    let b64encoded = data!.base64EncodedStringWithOptions([])
  } else {
    // manage the error
  }
}

Verify the signature:

AsymmetricCryptoManager.sharedInstance.verifySignaturePublicKey(rawData, signatureData: signatureData) { (success, error) -> Void in
  if success {
    // verification was successful
  } else {
    // verification failed.
  }
}

LICENSE

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

asymmetriccrypto's People

Contributors

Stargazers

Watchers

Forkers

ocforks bugix diatoming alyona-bachurina saifjilani mariusquainted laztoum ikishorek nimuzak edimoldovan douglasd3 rojanstha vosr

asymmetriccrypto's Issues

Can getPublicKeyData be made public again?

Hello,

I just upgraded to Swift 3 and also upgraded AssymetricCrypto. However, I am using getPublicKeyData which is now fileprivate so my code will not build. I can easily fix this by simply removing fileprivate, but I wanted to know if there is another way to get the public key data that I should be using. What I am currently doing:

AsymmetricCryptoManager.sharedInstance.createSecureKeyPair({ (success, error) in
   if success {
      let cryptoImportExportManager = CryptoExportImportManager()
      let publicKeyData = AsymmetricCryptoManager.sharedInstance.getPublicKeyData()
      publicKeyPem = cryptoImportExportManager.exportRSAPublicKeyToPEM(publicKeyData!, keyType: kSecAttrKeyTypeRSA as String, keySize: 2048)
                    
   } else {
      Log.error?.message("Error creating key pair: \(error.debugDescription)")
}

Perhaps you can remove fileprivate, unless there is a better way to do the above?

Thanks.

Consider adding the LICENSE file

Hey Ignacio, I just stumbled upon your repo and find this to be a good wrapper for the Security framework. I noticed in your blog post that the license adopted for this code is the MIT license. Do you mind adding this to the repo for clarity? Cheers.

There's no way to use my own keys?

I wish to use my public key to decrypt a string but I can't find any way to do so.
The asymetric crypto uses a generator for the keys.

Is there any way to make it work with my keys?

kAsymmetricCryptoManagerCypheredBufferSize error

Can i decrypt my Encrypted message from my Go using EncryptPKCS1v15

Currently, i'm trying to implement this library to generate public key in my iOS device, and save it in my database through API.

When i send this public key from this library, i modify publicKeyData using https://github.com/DigitalLeaves/CryptoExportImportManager

But, when i encrypt from my backend (GoLang), and i tried to decode the encrypted message from my backend with this code:

   let encryptedData = Data(base64Encoded: encryptedMessage, options: [])
    
    AsymmetricCryptoManager.sharedInstance.decryptMessageWithPrivateKey(encryptedData!) { (success, result, error) -> Void in
        if success {
            print("result: \(result)")
        } else {
            print("Error decoding base64 string: \(error)")
        }
    }

it got error decoding base64 string: Optional(com.myProjects.AsymmetricCryptoException.unableToDecrypt)

After several research, i found, Golang encrypt using EncryptPKCS1v15 (https://github.com/golang/go/blob/master/src/crypto/rsa/pkcs1v15.go)
which make the iOS app failed to decrypt it because it only has PKCS1.

What should i do to decrypt with PKCS1v15 padding ?

Unsafe warnings with Swift 5