嗨,我正在尝试将一段java代码转换为c#,以便使用rsa密钥进行解密
java代码
import javax.crypto.Cipher;
import javax.crypto.spec.OAEPParameterSpec;
import javax.crypto.spec.PSource;
import sun.misc.BASE64Decoder;
public static String decryptWithRSAKey(String encryptedString, Key pk) throws Exception {
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
Cipher cipher = Cipher.getInstance("RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING");
OAEPParameterSpec oaepParameterSpec = new OAEPParameterSpec("SHA-256", "MGF1", MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT);
cipher.init(Cipher.DECRYPT_MODE, pk,oaepParameterSpec);
return new String(cipher.doFinal(new BASE64Decoder().decodeBuffer(encryptedString)),"UTF-8");//1.6.031->rt.jar -> sun.misc.Base64Decoder
}
c代码
using javax.crypto;
using javax.crypto.spec;
using java.security.spec;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Digests;
using Org.BouncyCastle.Crypto.Encodings;
using java.security;
public static String DecryptWithRSAKey(String encryptedString, Org.BouncyCastle.Crypto.Parameters.RsaKeyParameters pk)
{
var decrypter = new OaepEncoding(new RsaEngine(), new Sha256Digest(), new Sha256Digest(), null);
decrypter.Init(false, pk);
var encrypted = decrypter.ProcessBlock(System.Text.Encoding.UTF8.GetBytes(encryptedString), 0, encryptedString.Length);
return Base64Encoder.Encode(encrypted);
}
触发
PrivateKeyfilePath =PATH TO PRIVATE KEY
RSAPrivateKey privateKey1 = (RSAPrivateKey)objAc.GetPrivate(PrivateKeyfilePath);
var rsaPri1 = new Org.BouncyCastle.Crypto.Parameters.RsaKeyParameters(true, new Org.BouncyCastle.Math.BigInteger(privateKey1.getModulus().ToString()),
new Org.BouncyCastle.Math.BigInteger(privateKey1.getPrivateExponent().ToString()));
String decryptedAESKeyString = RSAEncryptionWithAES.DecryptWithRSAKey(encryptedResponseKey, rsaPri1);
运行时,我得到一个错误输入太大的rsa密码
如何在c#bouncy castle中正确指定密码rsa/ecb/oaepwith sha-256和mgf1?
另外,对于rsa密码,错误输入是否太大?
1条答案
按热度按时间j2qf4p5b1#
因此,c代码在功能上与java代码相对应,在c代码中
encryptedString
必须在解密前进行base64解码(而不是utf8编码)。解密的数据必须是utf8解码(而不是base64编码):你也可以通过以下两个链接在线验证,https://dotnetfiddle.net/zi0n64 以及https://repl.it/@3hk8cl8h24hwis7/decimalnoteworthycharacters 用c#方法解密密文
DecryptWithRSAKey
以及java方法decryptWithRSAKey
,分别执行(在第一次调用时,将加载依赖项,因此此执行可能需要更长的时间)。