NETCore.Encrypt Versions Save

1:Update exception message to english. #48 2:Fix aes decrypt failed on .net 6.0 runtime. #49 3: Update unit tests and demo sdk to .net 6

1: Changed initialization of random generator 2: Changed documentation from Chinese to English

• Fix rsa create publickey error #36
• Ras add new method with byte[] paramater and return byte[] data. #32

1: Add Des iv create method 'CreateDesIv()'; 2: #24 Add Des CBC mode encrypt/decrypt with iv ; 3: Add unit test about new features;

Update

1: Add keySize and padding property in OutofMaxlengthException; 2: Add unit test about new feature.

New Feature

#25 Add rsa sign() and verfiy() method ,test rsa in .net framework 4.7.2 #28 Ras with pem features.

1: Add OutofMaxlengthException for rsa encrypt. 2: Add test about rsa OutofMaxlengthException.

1: Add demo about how to use. 2: Add new method for aes/des with byte[] encrypt/decrypt.

1:Fix Rsa bug on linux/ mac 2:Change the TargetFramework from netcoreapp2.0 to netstandard2.0

MD5 hash result's length support 16 and 32.