diff --git a/example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/ios/Classes/SwiftNativeCryptoPlugin.swift b/ios/Classes/SwiftNativeCryptoPlugin.swift
index 07043a7..6c46a80 100644
--- a/ios/Classes/SwiftNativeCryptoPlugin.swift
+++ b/ios/Classes/SwiftNativeCryptoPlugin.swift
@@ -7,6 +7,7 @@
 import Flutter
 import UIKit
 import CommonCrypto
+import Security
 
 extension FlutterStandardTypedData {
   var uint8Array: Array<UInt8> {
@@ -19,6 +20,17 @@ extension FlutterStandardTypedData {
   }
 }
 
+@available(iOS 10.0, *)
+func generateKeypair() {
+    var publicKeySec, privateKeySec: SecKey?
+    let keyattribute = [
+        kSecAttrKeyType as String: kSecAttrKeyTypeECSECPrimeRandom,
+        kSecAttrKeySizeInBits as String : 256
+        ] as CFDictionary
+    SecKeyGeneratePair(keyattribute, &publicKeySec, &privateKeySec)
+    
+}
+
 func crypt(operation: Int, algorithm: Int, options: Int, key: Data,
         initializationVector: Data, dataIn: Data) -> Data? {
     return key.withUnsafeBytes { keyUnsafeRawBufferPointer in
@@ -74,6 +86,11 @@ func pbkdf2sha256(password: String, salt: String, keyByteCount: Int, rounds: Int
     return pbkdf2(hash: CCPBKDFAlgorithm(kCCPRFHmacAlgSHA256), password: password, salt: salt, keyByteCount: keyByteCount, rounds: rounds)
 }
 
+func pbkdf2sha1(password: String, salt: String, keyByteCount: Int, rounds: Int) -> Data? {
+    return pbkdf2(hash: CCPBKDFAlgorithm(kCCPRFHmacAlgSHA1), password: password, salt: salt, keyByteCount: keyByteCount, rounds: rounds)
+}
+
+
 func randomGenerateBytes(count: Int) -> Data? {
     let bytes = UnsafeMutableRawPointer.allocate(byteCount: count, alignment: 1)
     defer { bytes.deallocate() }
@@ -151,8 +168,15 @@ public class SwiftNativeCryptoPlugin: NSObject, FlutterPlugin {
         let salt = args["salt"] as! String
         let keyLength = args["keyLength"] as! NSNumber
         let iteration = args["iteration"] as! NSNumber
+        let algo = args["algorithm"] as! String
         
-        let keyBytes = pbkdf2sha256(password: password, salt: salt, keyByteCount: keyLength.intValue, rounds: iteration.intValue)
+        var keyBytes: Data?
+        
+        if (algo == "sha1") {
+            keyBytes = pbkdf2sha1(password: password, salt: salt, keyByteCount: keyLength.intValue, rounds: iteration.intValue)
+        } else {
+            keyBytes = pbkdf2sha256(password: password, salt: salt, keyByteCount: keyLength.intValue, rounds: iteration.intValue)
+        }
         
         if keyBytes != nil {
             result(FlutterStandardTypedData.init(bytes: keyBytes!))