問題描述
我得到了一個 Base64 編碼的加密字符串，它是在 Java 中使用 Bouncy Castle 加密的.下面的示例 Java 代碼段:
I have been given a Base64 Encoded encrypted string, which was encrypted in Java using Bouncy Castle. Example Java snippet below:
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
cipher.init(Cipher.ENCRYPT_MODE, key.getPublic());
byte[] encryptedText = cipher.doFinal("xxxxx|xxxxx".getBytes("UTF-8"));
String encodedText = new BASE64Encoder().encode(encryptedText);
我需要使用 Bouncy Castle 解密生成的字符串，但在 C# 中我已經獲得了有關如何在 Java 中執行此操作的代碼片段，但我無法將其轉換為 C#(原因是我們正在構建一個 .net 站點，并且將成為 Java 站點中的 iFrame.Java 站點將 RSA 加密字符串傳遞給 .NET 站點).下面要解密的示例 Java 代碼:
I need to decrypt the resulting string using Bouncy Castle, but in C# I have been given a code snippet on how to do this in Java, but I can't convert this for C# (reasons is we are building a .net site, and is going to be an iFrame within a Java site. The Java site is going to passing in the RSA Encrypted string to the .NET site). Example Java code to decrypt below:
Cipher cipherDec = Cipher.getInstance("RSA/ECB/PKCS1Padding");
cipherDec.init(Cipher.DECRYPT_MODE, key.getPrivate());
byte[] decodedText = new BASE64Decoder().decodeBuffer(encodedText);
byte[] decryptedText = cipherDec.doFinal(decodedText);
String finalValue = new String(decryptedText, "UTF-8");
我已經從 http://www.bouncycastle.org/csharp/ 下載了示例，但是似乎沒有輸入字符串值進行加密的示例，然后通過加密/解密過程.
I have downloaded the examples from http://www.bouncycastle.org/csharp/ but there doesn't seem to be an example of inputting a string value to get encrypted, and it then going though the encrypt/decrypt process.
我得到了 模數、公共指數、私人指數、素數P、的值>prime q、prime exponent p、prime exponent q和crt coefficient.
I have been given values for modulus, public exponent, private expontent, prime P, prime q, prime exponent p, prime exponent q and crt coefficient.
我已經看到我可以使用以下內容:
I have seen that I can use the following:
IAsymmetricBlockCipher signer = new Pkcs1Encoding(new RsaEngine());
signer.Init(true, pubParameters);
但是 signer 對象似乎沒有與上面的 Java 示例相同的方法.
But the signer object doesn't seem to have the same methods as the Java examples above.
我唯一能用的方法是
ProcessBlock(byte[] inbuf, int inOff, int inLen);
但我看不出如何在我的上下文中使用它.
But I can't see how to use this in my context.
這里的任何幫助將不勝感激.
Any help here would be most appreciated.
推薦答案
為了幫助別人，最終轉換的代碼如下:
To Help others, the final code to convert is as follows:
RsaKeyParameters privParameters = new RsaPrivateCrtKeyParameters(mod, pubExp, privExp, p, q, pExp, qExp, crtCoef);
RsaKeyParameters pubParameters = new RsaKeyParameters(false, mod, pubExp);
IAsymmetricBlockCipher eng = new Pkcs1Encoding(new RsaEngine());
eng.Init(false, privParameters);
byte[] encdata = System.Convert.FromBase64String("{the enc string}");
encdata = eng.ProcessBlock(encdata, 0, encdata.Length);
string result = Encoding.UTF8.GetString(encdata);
mod、pubExp 等都是 BigInteger 值:
mod, pubExp etc etc are all BigInteger values:
static BigInteger mod = new BigInteger("big int value");
以下 using 指令是必需的:
The Following using directives are required:
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Encodings;
using Org.BouncyCastle.Math;
這可以從 bouncycastle 網站獲得.http://www.bouncycastle.org/csharp/
Which can be obtained from the bouncycastle site. http://www.bouncycastle.org/csharp/
這篇關于使用 Bouncy Castle 進行 C# RSA 解密的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！