小编Jos*_*ilu的帖子

学习使用 RSA 签名的机制，我有一个可以在下面运行的代码块。

var privateRSAKey = File.ReadAllText("RSAPrivateKey.txt").Trim();
Regex privateRSAKeyRegex = new Regex(@"-----(BEGIN|END) RSA PRIVATE KEY-----[\W]*");
privateRSAKey = privateRSAKeyRegex.Replace(privateRSAKey, "");

//byte[602]
byte[] rsaPrivateKeyBytes = Convert.FromBase64String(privateRSAKey);

RSA rsa = RSA.Create();
rsa.ImportRSAPrivateKey(new ReadOnlySpan<byte>(rsaPrivateKeyBytes), out _);

但类似的块无法用于替换另一个 rsa 对象上的公钥。

publicRSAKey = File.ReadAllText("RSAPublicKey.txt").Trim(); 
Regex publicRSAKeyRegex = new Regex(@"-----(BEGIN|END) PUBLIC KEY-----[\W]*");
publicRSAKey = publicRSAKeyRegex.Replace(publicRSAKey, "");

//byte[162]
byte[] rsaPublicKeyBytes = Convert.FromBase64String(publicRSAKey); 

RSA recipientRSA = RSA.Create(); 
recipientRSA.ImportRSAPublicKey(new ReadOnlySpan<byte>(rsaPublicKeyBytes), out _);

我只想替换字符串文件中的公共 rsa 密钥，但出现错误

An unhandled exception of type 'System.Security.Cryptography.CryptographicException' occurred in System.Security.Cryptography.Algorithms.dll
ASN1 corrupted data.