c# - c#中的弹性城堡解密来自私钥和加密文本

Question

Encrytped text is: wMXLjsRSfO1VngHqotJXoxygP1eTktr3gc3tuhdzXpqOy1N1V8/wflJuHkn1PX7Rf3/ccvL5vzPYYaKIm3s4IMhshrwVH3p4euprwRyNTvlBPLLmZ/b/wuTXkKqRdK81V9oHocIfxerivS4oIJfA4J6fMbtKom6IoE4GVhiAsJs=

我的私钥是：

  -----BEGIN RSA PRIVATE KEY-----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 yGNmcNFpgefjm4P4WrH81Ho8ImYp7QH3S35I36CtS1UGsj5OBSSj9ZAIGmkCQDI/
 xowjKMfamLckhg0PLnMJlVvyI8PVelnrIg0NpSTG2VtBsmFFi+Gk2gl/ayp3HEba
 lqPYWEWnjIQVXVnUD8kCQQDJpHSBSFQWRBRGHl2Oyy1SXiBYFdW2FH7+2c1WzN4P
 iKkmgOXqC2RfMD0aE/xtMe8F2zFhPKcARIvEvfneVjmT
 -----END RSA PRIVATE KEY-----

我在 c# 中使用 Bouncy Castle，当我使用以下代码使用加密文本和私钥解密时：

keyPair = (AsymmetricCipherKeyPair)new PemReader(reader).ReadObject();
IAsymmetricBlockCipher cipher = new RsaEngine();
RsaKeyParameters privateKey = (RsaKeyParameters)keyPair.Private;
cipher.Init(false, keyPair.Private);
byte[] deciphered = cipher.ProcessBlock(bytesl, 0, bytesl.Length);
string decipheredText = utf8enc.GetString(deciphered);

我得到 decipheredText 为

☻♣?????U??`?u????|???^H?|???☺????♦M>?→?&↔.0p?J??a?▼?S←$*▬T☼?  xQ??-??Ai9;??siqD??_???  ♥↓§?k?Ny??kr?U??↔z Mazher Ul Haq

但我的实际字符串是“Mazher Ul Haq”，如何获取实际字符串

Answer 1

您的“加密文本”实际上是 base64 文本。我怀疑如果你先把它转换成非base64数据，你应该没问题。如果您已经将其作为字符串获取，则很简单：

byte[] binaryData = Convert.FromBase64String(base64Text);

如果您需要先将其转换为字符串：

string base64Text = Encoding.ASCII.GetString(base64Binary);
byte[] binaryData = Convert.FromBase64String(base64Text);