Class AsymmetricEncryption

Inheritance
System.Object
AsymmetricEncryption
Namespace: Sensus.Encryption
Assembly: SensusAndroid.dll
Syntax
public class AsymmetricEncryption : Object, IEncryptor, IEnvelopeEncryptor

Constructors

AsymmetricEncryption(String)

Initializes a new instance of the AsymmetricEncryption class.

Declaration
public AsymmetricEncryption(string publicKeyString)
Parameters
Type Name Description
System.String publicKeyString

Public key string. Can be generated following the generation of the private key (see below) using the following command:

openssl rsa -in private.pem -outform PEM -pubout -out public.pem

AsymmetricEncryption(String, String)

Initializes a new instance of the AsymmetricEncryption class.

Declaration
public AsymmetricEncryption(string publicKeyString, string privateKeyString)
Parameters
Type Name Description
System.String publicKeyString

Public key string. Can be generated following the generation of the private key (see below) using the following command:

openssl rsa -in private.pem -outform PEM -pubout -out public.pem
System.String privateKeyString

Private key string. Only necessary if you want to be able to decrypt using this object. Can be generated with the following commands:

openssl genrsa -des3 -out private.pem 2048 openssl pkcs8 -topk8 -nocrypt -in private.pem

Methods

DecryptToBytes(Byte[])

Declaration
public byte[] DecryptToBytes(byte[] encryptedBytes)
Parameters
Type Name Description
System.Byte[] encryptedBytes
Returns
Type Description
System.Byte[]

DecryptToString(Byte[], Encoding)

Declaration
public string DecryptToString(byte[] encryptedBytes, Encoding encoding)
Parameters
Type Name Description
System.Byte[] encryptedBytes
System.Text.Encoding encoding
Returns
Type Description
System.String

Encrypt(Byte[])

Declaration
public byte[] Encrypt(byte[] unencryptedBytes)
Parameters
Type Name Description
System.Byte[] unencryptedBytes
Returns
Type Description
System.Byte[]

Encrypt(String, Encoding)

Declaration
public byte[] Encrypt(string unencryptedValue, Encoding encoding)
Parameters
Type Name Description
System.String unencryptedValue
System.Text.Encoding encoding
Returns
Type Description
System.Byte[]

EnvelopeAsync(Byte[], Int32, Int32, Stream, CancellationToken)

Encrypts bytes asymmetrically via symmetric encryption. Since asymmetric encryption does not support large data sizes, the approach is to generate a symmetric encryption key that is designed for large data sizes, encrypt the data with the symmetric key, encrypt the symmetric key with the asymmetric key, and send everything to output.

Declaration
public Task EnvelopeAsync(byte[] unencryptedBytes, int symmetricKeySizeBits, int symmetricInitializationVectorSizeBits, Stream encryptedOutputStream, CancellationToken cancellationToken)
Parameters
Type Name Description
System.Byte[] unencryptedBytes

Unencrypted bytes.
System.Int32 symmetricKeySizeBits

Symmetric key size in bits.
System.Int32 symmetricInitializationVectorSizeBits

Symmetric initialization vector size in bits.
System.IO.Stream encryptedOutputStream

Encrypted output stream.
System.Threading.CancellationToken cancellationToken

Cancellation token.
Returns
Type Description
System.Threading.Tasks.Task

Implements