PCLCrypto | Platform crypto for portable libraries | Cryptography library

I am trying to setup a CI server on a Mac using Jenkins. It will be eventually be building Xamarin solutions. Currently I have it checking code out from our svn server, doing a restore for the Nuget packages, and finally trying to build the projects.

I currently am testing this on a Xamarin .NET 2.0 standard library. The checkout and restore work but on the build step I get errors saying I am missing references to Mscorlib amongst other things. I can build the project in Visual Studio on Mac just fine. What am I doing wrong with the setup?

I have the Jenkins MSBuild plugin setup to run msbuild from /Library/Frameworks/Mono.framework/Commands/msbuild. Below is the console output from Jenkins:

I am trying to send a push notification from an iOS device (iPhone) via Azure NotificationHub REST Api. I am attempting this from a Xamarin.iOS solution following the Azure documentation I found online.

Error: '50002: Provider Internal Error' Status code: 500

I installed the Xamarin NuGet into my solution and tried to run the app. When I received this error

I'm trying to add a reference to the package PCLCrypto (2.0.147) in a project using NetStandard 1.3

After I add the import "portable-net45+netcore45+wpa81" in the project.json, it builds, but keep showing the errors.

project.json:

I have to use Aes encryption in our Xamarin PCL project. Our project uses the portable framework and not the standard so I can't use the new built in classes. I tried changing to the .NET Standard but ended up with countless errors and since I've never used it before, I figured I probably shouldn't make such a change now.

I thought this could be done using the PCLCrypto package but haven't been able to get it to work.

We currently support iOS and Android.

I'm trying to figure out how to convert the following code from our server side.

I am trying to find the correct version configurations in order to utilize the Xamarin.Facebook.Android package and still be able to support Lollipop (the latest version seems to only support Nougat).

I installed many necessary packages, but now I get an error while building that I can't seem to get rid of.

java.lang.IllegalArgumentException: already added : Lbolts/AggregateException;

My googling suggested that this error is generally caused by having multiples of one package. I couldn't figure out how to fix the problem.

Here is the list of installed packages for the project. Any help would be much appreciated! (Sorry for the length)

AWSSDK.APIGateway {3.3.8}
AWSSDK.CognitoIdentity {3.3.2.14}
AWSSDK.CognitoIdentityProvider {3.3.6}
AWSSDK.CognitoSync {3.3.1.23}
AWSSDK.Core {3.3.17.8}
AWSSDK.DynamoDBv2 {3.3.4.17}
AWSSDK.Extensions.CognitoAuthentication {0.9.1}
AWSSDK.IdentityManagement {3.3.4.3}
AWSSDK.S3 {3.3.10.4}
AWSSDK.SecurityToken {3.3.3}
AWSSDK.SimpleNotificationService {3.3.0.21}
AWSSDK.SQS {3.3.2.7}
Bolts {1.4.0.1}
Microsoft.Bcl {1.1.10}
Microsoft.Bcl.Build {1.0.21}
Microsoft.CSharp {4.4.0}
Microsoft.Net.Http {2.2.29}
Microsoft.NETCore.Platforms {2.0.0}
Microsoft.Win32.Primitives {4.3.0}
NETStandard.Library {2.0.0}
Newtonsoft.Json {10.0.3}
PCLCrypto {2.0.147}
PCLStorage {1.0.2}
PInvoke.BCrypt {0.3.2}
PInvoke.Kernel32 {0.3.2}
PInvoke.NCrypt {0.3.2}
PInvoke.Windows.Core {0.3.2}
SQLitePCLRaw.bundle_green {1.1.8}
SQLitePCLRaw.core {1.1.8}
SQLitePCLRaw.lib.e_sqlite3.android {1.1.8}
SQLitePCLRaw.provider.e_sqlite3.android {1.1.8}
System.AppContext {4.3.0}
System.Collections {4.3.0}
System.Collections.Concurrent {4.3.0}
System.Collections.NonGeneric {4.3.0}
System.ComponentModel.TypeConverter {4.3.0}
System.Console {4.3.0}
System.Diagnostics.Debug {4.3.0}
System.Diagnostics.Tools {4.3.0}
System.Diagnostics.Tracing {4.3.0}
System.Globalization {4.3.0}
System.Globalization.Calendars {4.3.0}
System.IO {4.3.0}
System.IO.Compression {4.3.0}
System.IO.Compression.ZipFile {4.3.0}
System.IO.FileSystem {4.3.0}
System.IO.FileSystem.Primitives {4.3.0}
System.Linq {4.3.0}
System.Linq.Expressions {4.3.0}
System.Net.Http {4.3.2}
System.Net.Primitives {4.3.0}
System.Net.Sockets {4.3.0}
System.ObjectModel {4.3.0}
System.Reflection {4.3.0}
System.Reflection.Extensions {4.3.0}
System.Reflection.Primitives {4.3.0}
System.Resources.ResourceManager {4.3.0}
System.Runtime {4.3.0}
System.Runtime.Extensions {4.3.0}
System.Runtime.Handles {4.3.0}
System.Runtime.InteropServices {4.3.0}
System.Runtime.InteropServices.RuntimeInformation {4.3.0}
System.Runtime.Numerics {4.3.0}
System.Runtime.Serialization.Formatters {4.3.0}
System.Runtime.Serialization.Primitives {4.3.0}
System.Security.Cryptography.Algorithms {4.3.0}
System.Security.Cryptography.Encoding {4.3.0}
System.Security.Cryptography.Primitives {4.3.0}
System.Security.Cryptography.X509Certificates {4.3.0}
System.Text.Encoding {4.3.0}
System.Text.Encoding.Extensions {4.3.0}
System.Text.RegularExpressions {4.3.0}
System.Threading {4.3.0}
System.Threading.Tasks {4.3.0}
System.Threading.Timer {4.3.0}
System.Xml.ReaderWriter {4.3.0}
System.Xml.XDocument {4.3.0}
System.Xml.XmlDocument {4.3.0}
Validation {2.4.15}
Xamarin.Android.Support.Animated.Vector.Drawable {23.4.0.1}
Xamarin.Android.Support.CustomTabs {23.4.0.1}
Xamarin.Android.Support.v4 {23.4.0.1}
Xamarin.Android.Support.v7.AppCompat {23.4.0.1}
Xamarin.Android.Support.v7.CardView {23.4.0.1}
Xamarin.Android.Support.Vector.Drawable {23.4.0.1}
Xamarin.Facebook.Android {4.16.1}

As you know akavache has issues with its secure storage on iOS and Android. I am trying to override the secure storage used by Akavache.

I've been following the example given by Kent to solve this problem: http://kent-boogaart.com/blog/password-protected-encryption-provider-for-akavache

Note: I cannot use System.Security.Cryptography in my code, because we are using PCL's. Therefore I am using PCLCrypto.

I use a setup class to initialize DI:

I'm currently developing a Xamarin Forms Project and I need to use a few encryption methods that would normally be available through namespace System.Security.Cryptography namely RSACryptoServiceProvider. So far I have been using PCLCrypto nuget package to use other methods such MD5 hashing but I haven't figured out how to use RSA specifically. I was also wondering if it would be better to implement those methods directly on each native Project instead and then use them on the shared one instead of using the nuget.

Any thoughts on this? If someone could point me towards some documentation for PCLCrypto equivalent to what I need it would be fine as well, I just need some lights on this concern and some clarification since I've read some other questions but there isn't really a consensus.

I'm always getting this error and app crashes in ios.Android is working without any problem ,but in ios app crashes while loading. I tried to restore nuget packages but still getting this error.Any help is appreciated ,thanks.