AES Encrypt and Decrypt

Question

I write an application by swift  i need AES Encrypt and Decrypt functionality  i received encrypted data from another  Net solution  but i can t find something to do it   This is my  net Encryption    public static byte   AES Encrypt byte   bytesToBeEncrypted  byte   passwordBytes                byte   encryptedBytes   null           byte   saltBytes   new byte     1  2  3  4  5  6  7  8             using  MemoryStream ms   new MemoryStream                          using  RijndaelManaged AES   new RijndaelManaged                                  AES KeySize   256                  AES BlockSize   128                   var key   new Rfc2898DeriveBytes passwordBytes  saltBytes  1000                   AES Key   key GetBytes AES KeySize   8                   AES IV   key GetBytes AES BlockSize   8                    AES Mode   CipherMode CBC                   using  var cs   new CryptoStream ms  AES CreateEncryptor    CryptoStreamMode Write                                         cs Write bytesToBeEncrypted  0  bytesToBeEncrypted Length                       cs Close                                      encryptedBytes   ms ToArray                                     return encryptedBytes          I need to decrypt function in swift

User · Accepted Answer

I found the solution  it is a good library   Cross platform 256bit AES encryption   decryption   This project contains the implementation of 256 bit AES encryption which works on all the platforms  C   iOS  Android   One of the key objective is to make AES work on all the platforms with simple implementation   Platforms Supported  iOS    Android    Windows  C     https   github com Pakhee Cross-platform-AES-encryption

User · Answer

I was using CommonCrypto to generate Hash through the code of MihaelIsaev HMAC swift from Easy to use Swift implementation of CommonCrypto HMAC  This implementation is without using Bridging-Header  with creation of Module file   Now to use AESEncrypt and Decrypt  I directly added the functions inside  extension String    in HAMC swift   func aesEncrypt key String  iv String  options Int   kCCOptionPKCS7Padding  - gt  String        if let keyData   key dataUsingEncoding NSUTF8StringEncoding           data   self dataUsingEncoding NSUTF8StringEncoding           cryptData      NSMutableData length  Int  data length     kCCBlockSizeAES128                 let keyLength                size t kCCKeySizeAES128              let operation  CCOperation   UInt32 kCCEncrypt              let algoritm   CCAlgorithm   UInt32 kCCAlgorithmAES128              let options    CCOptions     UInt32 options               var numBytesEncrypted  size t   0              let cryptStatus   CCCrypt operation                  algoritm                  options                  keyData bytes  keyLength                  iv                  data bytes  data length                  cryptData mutableBytes  cryptData length                   amp numBytesEncrypted               if UInt32 cryptStatus     UInt32 kCCSuccess                    cryptData length   Int numBytesEncrypted                  let base64cryptString   cryptData base64EncodedStringWithOptions  Encoding64CharacterLineLength                  return base64cryptString                           else                   return nil                         return nil    func aesDecrypt key String  iv String  options Int   kCCOptionPKCS7Padding  - gt  String        if let keyData   key dataUsingEncoding NSUTF8StringEncoding           data   NSData base64EncodedString  self  options   IgnoreUnknownCharacters           cryptData      NSMutableData length  Int  data length     kCCBlockSizeAES128                 let keyLength                size t kCCKeySizeAES128              let operation  CCOperation   UInt32 kCCDecrypt              let algoritm   CCAlgorithm   UInt32 kCCAlgorithmAES128              let options    CCOptions     UInt32 options               var numBytesEncrypted  size t   0              let cryptStatus   CCCrypt operation                  algoritm                  options                  keyData bytes  keyLength                  iv                  data bytes  data length                  cryptData mutableBytes  cryptData length                   amp numBytesEncrypted               if UInt32 cryptStatus     UInt32 kCCSuccess                    cryptData length   Int numBytesEncrypted                  let unencryptedMessage   String data  cryptData  encoding NSUTF8StringEncoding                  return unencryptedMessage                           else                   return nil                         return nil     The functions were taken from RNCryptor  It was an easy addition in the hashing functions and in one single file  HMAC swift   without using Bridging-header  I hope this will be useful for developers in swift requiring Hashing and AES Encryption Decryption   Example of using the AESDecrypt as under    let iv    AA-salt-BBCCDD--     should be of 16 characters     here we are convert nsdata to String  let encryptedString   String data  dataFromURL  encoding  NSUTF8StringEncoding     now we are decrypting  if let decryptedString   encryptedString  aesDecrypt  12345678901234567890123456789012   iv  iv     32 char pass key                                 Your decryptedString

User · Answer

CryptoSwift is very interesting project but for now it has some AES speed limitations  Be carefull if you need to do some serious crypto - it might be worth to go through the pain of bridge implemmenting CommonCrypto   BigUps to Marcin for pureSwift implementation

User · Answer

Code provided by SHS didn t work for me  but this one apparently did  I used a Bridging Header   import  lt CommonCrypto CommonCrypto h gt     extension String        func aesEncrypt key String  iv String  options Int   kCCOptionPKCS7Padding  - gt  String            if let keyData   key data using  String Encoding utf8               let data   self data using  String Encoding utf8               let cryptData      NSMutableData length  Int  data count     kCCBlockSizeAES128                  let keyLength                size t kCCKeySizeAES128              let operation  CCOperation   UInt32 kCCEncrypt              let algoritm   CCAlgorithm   UInt32 kCCAlgorithmAES128              let options    CCOptions     UInt32 options                 var numBytesEncrypted  size t   0              let cryptStatus   CCCrypt operation                                        algoritm                                        options                                         keyData as NSData  bytes  keyLength                                        iv                                         data as NSData  bytes  data count                                        cryptData mutableBytes  cryptData length                                         amp numBytesEncrypted               if UInt32 cryptStatus     UInt32 kCCSuccess                    cryptData length   Int numBytesEncrypted                  let base64cryptString   cryptData base64EncodedString options   lineLength64Characters                  return base64cryptString                             else                   return nil                                 return nil            func aesDecrypt key String  iv String  options Int   kCCOptionPKCS7Padding  - gt  String            if let keyData   key data using  String Encoding utf8               let data   NSData base64Encoded  self  options   ignoreUnknownCharacters               let cryptData      NSMutableData length  Int  data length     kCCBlockSizeAES128                 let keyLength                size t kCCKeySizeAES128              let operation  CCOperation   UInt32 kCCDecrypt              let algoritm   CCAlgorithm   UInt32 kCCAlgorithmAES128              let options    CCOptions     UInt32 options               var numBytesEncrypted  size t   0              let cryptStatus   CCCrypt operation                                        algoritm                                        options                                         keyData as NSData  bytes  keyLength                                        iv                                        data bytes  data length                                        cryptData mutableBytes  cryptData length                                         amp numBytesEncrypted               if UInt32 cryptStatus     UInt32 kCCSuccess                    cryptData length   Int numBytesEncrypted                  let unencryptedMessage   String data  cryptData as Data  encoding String Encoding utf8                  return unencryptedMessage                           else                   return nil                                 return nil             From my ViewController    let encoded   message aesEncrypt key  keyString  iv  iv   let unencode   encoded  aesDecrypt key  keyString  iv  iv

User · Answer

Update Swift 4 2  Here  for instance  we encrypt a string to base64encoded string  And then we decrypt the same to a readable string   That would be same as our input string    In my case  I use this to encrypt a string and embed that to QR Code  Then another party scan that and decrypt the same  So intermediate won t understand the QR codes    Step 1  Encrypt a string  Encrypt My Message 123   Step 2  Encrypted base64Encoded string    yvNjiD7F9 JKmqHTc Mjg     The same printed on QR code   Step 3  Scan and decrypt the string   yvNjiD7F9 JKmqHTc Mjg      Step 4  It comes final result -  Encrypt My Message 123      Functions for Encrypt  amp  Decrypt   func encryption stringToEncrypt  String  - gt  String      let key    MySecretPKey        let iv    92c9d2c07a9f2e0a      let data   stringToEncrypt data using   utf8      let keyD   key data using   utf8      let encr    data as NSData    aes128EncryptedData withKey  keyD      let base64String  String    encr as NSData    base64EncodedString options  NSData Base64EncodingOptions rawValue  0       print base64String      return base64String    func decryption encryptedString String  - gt  String      let key    MySecretPKey        let iv    92c9d2c07a9f2e0a      let keyD   key data using   utf8      let decrpStr   NSData base64Encoded  encryptedString  options  NSData Base64DecodingOptions rawValue  0       let dec    decrpStr   aes128DecryptedData withKey  keyD      let backToString   String data  dec   encoding  String Encoding utf8      print backToString       return backToString      Usage       let enc   encryption stringToEncrypt   Encrypt My Message 123       let decryptedString   decryption encryptedString  enc      print decryptedString     Classes for supporting AES encrypting functions  these are written in Objective-C  So for swift  you need to use bridge header to support these      Class Name  NSData AES h    import  lt Foundation Foundation h gt    interface NSData  AES   -  NSData   AES128EncryptedDataWithKey  NSData   key  -  NSData   AES128DecryptedDataWithKey  NSData   key  -  NSData   AES128EncryptedDataWithKey  NSData   key iv  NSData   iv  -  NSData   AES128DecryptedDataWithKey  NSData   key iv  NSData   iv    end      Class Name  NSData AES m    import  NSData AES h   import  lt CommonCrypto CommonCryptor h gt    implementation NSData  AES   -  NSData   AES128EncryptedDataWithKey  NSData   key       return  self AES128EncryptedDataWithKey key iv nil      -  NSData   AES128DecryptedDataWithKey  NSData   key       return  self AES128DecryptedDataWithKey key iv nil      -  NSData   AES128EncryptedDataWithKey  NSData   key iv  NSData   iv       return  self AES128Operation kCCEncrypt key key iv iv      -  NSData   AES128DecryptedDataWithKey  NSData   key iv  NSData   iv       return  self AES128Operation kCCDecrypt key key iv iv      -  NSData   AES128Operation  CCOperation operation key  NSData   key iv  NSData   iv        NSUInteger dataLength    self length       size t bufferSize   dataLength   kCCBlockSizeAES128      void  buffer   malloc bufferSize        size t numBytesEncrypted   0      CCCryptorStatus cryptStatus   CCCrypt operation                                            kCCAlgorithmAES128                                            kCCOptionPKCS7Padding   kCCOptionECBMode                                            key bytes                                            kCCBlockSizeAES128                                            iv bytes                                             self bytes                                             dataLength                                            buffer                                            bufferSize                                             amp numBytesEncrypted       if  cryptStatus    kCCSuccess            return  NSData dataWithBytesNoCopy buffer length numBytesEncrypted             free buffer       return nil      end   I hope that helps   Thanks

User · Answer

There is an interesting  pure-swift  Open Source library     CryptoSwift  https   github com krzyzanowskim CryptoSwift  It supports  AES-128  AES-192  AES-256  ChaCha20   Example with AES decrypt  got from project README md file    import CryptoSwift let setup    key  keyData  iv  ivData  let decryptedAES   AES setup  decrypt encryptedData

User · Answer

Try with below code it s working for me   AES Encryption  public static String getEncryptedString String value            try             byte   key   your Key in byte array            byte   input   sault in byte array              return Base64 encodeToString encrypt value getBytes  UTF-8    key  input   Base64 DEFAULT             catch  UnsupportedEncodingException e                return                        public static byte   encrypt byte   data  byte   key  byte   ivs            try               Cipher cipher   Cipher getInstance  AES CBC PKCS5Padding                SecretKeySpec secretKeySpec   new SecretKeySpec key   AES                byte   finalIvs   new byte 16               int len   ivs length  gt  16   16   ivs length              System arraycopy ivs  0  finalIvs  0  len               IvParameterSpec ivps   new IvParameterSpec finalIvs               cipher init Cipher ENCRYPT MODE  secretKeySpec  ivps               return cipher doFinal data             catch  Exception e                e printStackTrace                      return null          AES DECRYPTION   public static String decrypt String encrypted  throws NoSuchAlgorithmException  NoSuchPaddingException  InvalidKeyException  InvalidAlgorithmParameterException  IllegalBlockSizeException  BadPaddingException  UnsupportedEncodingException                byte   key   your Key in byte array              byte   input   sault in byte array               SecretKeySpec skeySpec   new SecretKeySpec key   AES                IvParameterSpec ivSpec   new IvParameterSpec input               Cipher ecipher   Cipher getInstance  AES CBC PKCS5Padding                ecipher init Cipher DECRYPT MODE  skeySpec  ivSpec               byte   raw   Base64 decode encrypted  Base64 DEFAULT               byte   originalBytes   ecipher doFinal raw               String original   new String originalBytes   UTF8                return original

User · Answer

Swift4   let key    ccC2H19lDDbQDfakxcrtNMQdd0FloLGG     length    32 let iv    ggGGHUiDD0Qjhuvv     length    16 func encryptFile   path  URL  - gt  Bool      do          let data   try Data init contentsOf  path          let encodedData   try data aesEncrypt key  key  iv  iv          try encodedData write to  path          return true      catch          return false          func decryptFile   path  URL  - gt  Bool      do          let data   try Data init contentsOf  path          let decodedData   try data aesDecrypt key  key  iv  iv          try decodedData write to  path          return true      catch          return false           Install CryptoSwift  import CryptoSwift extension Data       func aesEncrypt key  String  iv  String  throws - gt  Data          let encypted   try AES key  key bytes  blockMode  CBC iv  iv bytes   padding   pkcs7  encrypt self bytes          return Data bytes  encypted             func aesDecrypt key  String  iv  String  throws - gt  Data           let decrypted   try AES key  key bytes  blockMode  CBC iv  iv bytes   padding   pkcs7  decrypt self bytes          return Data bytes  decrypted

User · Answer

CryptoSwift Example  Updated SWIFT 4    func aesEncrypt   throws - gt  String       let encrypted   try AES key  KEY  iv  IV  padding   pkcs7  encrypt  UInt8  self data using   utf8         return Data encrypted  base64EncodedString      func aesDecrypt   throws - gt  String       guard let data   Data base64Encoded  self  else   return          let decrypted   try AES key  KEY  iv  IV  padding   pkcs7  decrypt  UInt8  data       return String bytes  decrypted  encoding   utf8     self

User · Answer

CryptoSwift Example  Updated to Swift 2  import Foundation import CryptoSwift  extension String       func aesEncrypt key  String  iv  String  throws - gt  String          let data   self dataUsingEncoding NSUTF8StringEncoding          let enc   try AES key  key  iv  iv  blockMode  CBC  encrypt data  arrayOfBytes    padding  PKCS7            let encData   NSData bytes  enc  length  Int enc count           let base64String  String   encData base64EncodedStringWithOptions NSDataBase64EncodingOptions rawValue  0            let result   String base64String          return result            func aesDecrypt key  String  iv  String  throws - gt  String           let data   NSData base64EncodedString  self  options  NSDataBase64DecodingOptions rawValue  0           let dec   try AES key  key  iv  iv  blockMode  CBC  decrypt data  arrayOfBytes    padding  PKCS7            let decData   NSData bytes  dec  length  Int dec count           let result   NSString data  decData  encoding  NSUTF8StringEncoding          return String result             Usage   let key    bbC2H19lkVbQDfakxcrtNMQdd0FloLyw     length    32 let iv    gqLOHUioQ0QjhuvI     length    16 let s    string to encrypt  let enc   try  s aesEncrypt key  iv  iv  let dec   try  enc aesDecrypt key  iv  iv  print s     string to encrypt print  enc   enc       2r0 KirTTegQfF4wI8rws0LuV8h82rHyyYz7xBpXIpM  print  dec   dec       string to encrypt print    s    dec       true   Make sure you have the right length of iv  16  and key  32  then you won t hit  Block size and Initialization Vector must be the same length   error

User · Answer

This is a pretty old post but XCode 10 added the CommonCrypto module so you don t need a module map  Also with Swift 5  no need for the annoying casts   You could do something like   func decrypt   data  Data  iv  Data  key  Data  throws - gt  String        var buffer    UInt8  repeating  0  count  data count   kCCBlockSizeAES128      var bufferLen  Int   0      let status   CCCrypt          CCOperation kCCDecrypt           CCAlgorithm kCCAlgorithmAES128           CCOptions kCCOptionPKCS7Padding            UInt8  key           kCCBlockSizeAES128           UInt8  iv            UInt8  data           data count           amp buffer          buffer count           amp bufferLen            guard status    kCCSuccess          let str   String data  Data bytes  buffer  count  bufferLen                            encoding   utf8  else                               throw NSError domain   AES   code  -1  userInfo  nil             return str

User · Answer

You can use CommonCrypto from iOS or CryptoSwift as external library  There are implementations with both tools below  That said  CommonCrypto output with AES should be tested  as it is not clear in CC documentation  which mode of AES it uses   CommonCrypto in Swift 4 2       import CommonCrypto      func encrypt data  Data  -  Data           return cryptCC data  data  key  key  operation  kCCEncrypt             func decrypt data  Data  -  Data           return cryptCC data  data  key  key  operation  kCCDecrypt             private func cryptCC data  Data  key  String operation  Int  -  Data            guard key count    kCCKeySizeAES128 else               fatalError  Key size failed                       var ivBytes   UInt8          var inBytes   UInt8          var outLength  Int          if operation    kCCEncrypt               ivBytes    UInt8  repeating  0  count  kCCBlockSizeAES128              guard kCCSuccess    SecRandomCopyBytes kSecRandomDefault  ivBytes count   ivBytes  else                   fatalError  IV creation failed                               inBytes   Array data              outLength   data count   kCCBlockSizeAES128            else               ivBytes   Array Array data  dropLast data count - kCCBlockSizeAES128               inBytes   Array Array data  dropFirst kCCBlockSizeAES128               outLength   inBytes count                     var outBytes    UInt8  repeating  0  count  outLength          var bytesMutated   0          guard kCCSuccess    CCCrypt CCOperation operation   CCAlgorithm kCCAlgorithmAES128   CCOptions kCCOptionPKCS7Padding   Array key   kCCKeySizeAES128   ivBytes   inBytes  inBytes count   outBytes  outLength   bytesMutated  else               fatalError  Cryptography operation   operation  failed                      var outData   Data bytes   outBytes  count  bytesMutated           if operation    kCCEncrypt               ivBytes append contentsOf  Array outData               outData   Data bytes  ivBytes                    return outData            CryptoSwift v0 14 in Swift 4 2        enum Operation           case encrypt         case decrypt            private let keySizeAES128   16     private let aesBlockSize   16      func encrypt data  Data  key  String  -  Data           return crypt data  data  key  key  operation   encrypt             func decrypt data  Data  key  String  -  Data           return crypt data  data  key  key  operation   decrypt             private func crypt data  Data  key  String  operation  Operation  -  Data            guard key count    keySizeAES128 else               fatalError  Key size failed                      var outData  Data    nil          if operation     encrypt               var ivBytes    UInt8  repeating  0  count  aesBlockSize              guard 0    SecRandomCopyBytes kSecRandomDefault  ivBytes count   ivBytes  else                   fatalError  IV creation failed                               do                   let aes   try AES key  Array key data using   utf8     blockMode  CBC iv  ivBytes                   let encrypted   try aes encrypt Array data                   ivBytes append contentsOf  encrypted                  outData   Data bytes  ivBytes                 catch                   print  Encryption error    error                             else               let ivBytes   Array Array data  dropLast data count - aesBlockSize               let inBytes   Array Array data  dropFirst aesBlockSize                do                   let aes   try AES key  Array key data using   utf8     blockMode  CBC iv  ivBytes                   let decrypted   try aes decrypt inBytes                  outData   Data bytes  decrypted                 catch                   print  Decryption error    error                                    return outData

User · Answer

You can just copy  amp  paste these methods  Swift 4         class func encryptMessage message  String  encryptionKey  String  iv  String  - gt  String            if let aes   try  AES key  encryptionKey  iv  iv               let encrypted   try  aes encrypt Array lt UInt8 gt  message utf8                 return encrypted toHexString                     return nil            class func decryptMessage encryptedMessage  String  encryptionKey  String  iv  String  - gt  String            if let aes   try  AES key  encryptionKey  iv  iv               let decrypted   try  aes decrypt Array lt UInt8 gt  hex  encryptedMessage                 return String data  Data bytes  decrypted   encoding   utf8                    return nil         Example   let encryptMessage   encryptMessage message   Hello World    encryptionKey   mykeymykeymykey1   iv   myivmyivmyivmyiv          Output of encryptMessage is  649849a5e700d540f72c4429498bf9f4  let decryptedMessage   decryptMessage encryptedMessage  encryptMessage  encryptionKey   mykeymykeymykey1   iv   myivmyivmyivmyiv      Output of decryptedMessage is  Hello World         Don t forget encryptionKey  amp  iv should be 16 bytes

[ios] AES Encrypt and Decrypt

Examples related to ios

Examples related to swift

Examples related to encryption

Examples related to aes

Examples related to cryptoswift