Add test about rsa encrypt string length limit.

Author: myloveCc

test/NETCore.Encrypt.Tests/RSA_Tests.cs

@@ -4,6 +4,7 @@
 using Xunit;
 using NETCore.Encrypt;
 using System.Security.Cryptography;
+using NETCore.Encrypt.Extensions;
 
 namespace NETCore.Encrypt.Tests
 {
@@ -154,5 +155,58 @@ public void Rsa_From_JsonString_Test()
             Assert.NotNull(rsa);
 
         }
+
+        [Theory(DisplayName = "Rsa encrypt string length limit test")]
+        [InlineData(RsaSize.R2048)]
+        [InlineData(RsaSize.R3072)]
+        [InlineData(RsaSize.R4096)]
+        public void Rsa_Encrypt_LengthLimit_Test(RsaSize size)
+        {
+            var rsaKey = EncryptProvider.CreateRsaKey(size);
+
+            var publicKey = rsaKey.PublicKey;
+
+            //Act
+            var rawStr = "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";
+
+
+            //RSAEncryptionPaddingMode is Pkcs1
+            var padding = RSAEncryptionPadding.Pkcs1;
+            var maxLength = ((int) size - 384) / 8 + 37;
+            var rawData = rawStr.Substring(0, maxLength);
+
+            var encryptStr = EncryptProvider.RSAEncrypt(publicKey, rawData, padding);
+
+
+            //RSAEncryptionPaddingMode is Oaep
+            padding = RSAEncryptionPadding.OaepSHA1;
+
+            var sha1 = "oaep".SHA1();
+            var length = sha1.Length;
+            maxLength = (int) size / 8 - 42;   //214 //40 
+            rawData = rawStr.Substring(0, maxLength);
+
+            encryptStr = EncryptProvider.RSAEncrypt(publicKey, rawData, padding);
+
+
+            padding = RSAEncryptionPadding.OaepSHA256;
+
+            maxLength = (int) size / 8 - 66;   //190   //64
+            rawData = rawStr.Substring(0, maxLength);
+
+            encryptStr = EncryptProvider.RSAEncrypt(publicKey, rawData, padding);
+
+            padding = RSAEncryptionPadding.OaepSHA384;
+            maxLength = (int) size / 8 - 100;  //158  //96
+            rawData = rawStr.Substring(0, maxLength);
+
+            encryptStr = EncryptProvider.RSAEncrypt(publicKey, rawData, padding);
+
+            padding = RSAEncryptionPadding.OaepSHA512;
+            maxLength = (int) size / 8 - 130; //126  // 128
+            rawData = rawStr.Substring(0, maxLength);
+
+            encryptStr = EncryptProvider.RSAEncrypt(publicKey, rawData, padding);
+        }
     }
 }