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我想從java密鑰庫中提取一個私鑰，然後將其提供給Ganymed SSH以建立與公鑰認證的連接。但是它拒絕連接。使用JKS密鑰庫進行公鑰驗證與Ganymed SSH
我可以通過Cygwin（ssh -i）與以下程序生成的文件成功連接，但程序本身無法在同一臺計算機上獲得過去的身份驗證。我究竟做錯了什麼？
我沒有得到例外，Connection.authenticateWithPublicKey(String, char[], String)只是返回false，所以這不應該是一個格式問題。我沒有加密私鑰，結果是一樣的。另外，我可以通過putty-gen和ssh-keygen生成的文件與類似的程序進行連接。
您將需要以下編譯（BouncyCastle的和ganymed）：
生成與密鑰庫：
keytool -genkeypair -keystore keystore.jks -alias myalias -storepass password -keypass password -keyalg RSA -dname CN=myalias,O=example.com -storetype JKS -validity 365 -v
代碼（預計主機和端口指定參數和在工作目錄上面的密鑰庫）：
import ch.ethz.ssh2.Connection;
import java.io.ByteArrayOutputStream;
import java.io.CharArrayWriter;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.security.GeneralSecurityException;
import java.security.Key;
import java.security.KeyStore;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.cert.Certificate;
import java.security.interfaces.DSAParams;
import java.security.interfaces.DSAPublicKey;
import java.security.interfaces.RSAPublicKey;
import javax.xml.bind.DatatypeConverter;
import org.bouncycastle.openssl.PEMEncryptor;
import org.bouncycastle.openssl.jcajce.JcaPEMWriter;
import org.bouncycastle.openssl.jcajce.JcePEMEncryptorBuilder;
public class KeystoreGanymedSSH {
public static void main(String[] args)
throws Exception {
String keystorePath = "keystore.jks";
char[] password = "password".toCharArray();
String alias = "myalias";
String host = args[0];
int port = Integer.parseInt(args[1]);
// keystore init
KeyStore keystore = KeyStore.getInstance("JKS");
InputStream in;
try {
in = new FileInputStream(keystorePath);
} catch (FileNotFoundException ex) {
System.out.println("Generate keystore using this command:");
System.out.println("keytool -genkeypair -keystore keystore.jks"
+ " -alias myalias -storepass password -keypass password"
+ " -keyalg RSA -dname CN=myalias,O=example.com -storetype"
+ " JKS -validity 365 -v");
throw ex;
}
try {
keystore.load(in, password);
} finally {
in.close();
}
// get public key in OpenSSH format
String authorizedKeysEntry = genAuthorizedKeysEntry(keystore, alias);
if (authorizedKeysEntry == null) {
throw new Exception("could not generate authorized_keys entry");
}
System.out.println("Public key for pasting into OpenSSH authorized_keys file (always same):");
System.out.println(authorizedKeysEntry);
System.out.println();
Writer writer;
// write to file
writer = new OutputStreamWriter(
new FileOutputStream(new File("authorized_keys")), "UTF-8");
try {
writer.write(authorizedKeysEntry);
} finally {
writer.close();
}
// obtain PEM encrypted char[]
Key key = keystore.getKey(alias, password);
writer = new CharArrayWriter();
JcaPEMWriter pw = new JcaPEMWriter(writer);
SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
PEMEncryptor encryptor = new JcePEMEncryptorBuilder("DES-EDE3-CBC")
.setSecureRandom(random).build(password);
pw.writeObject(key, encryptor);
pw.flush();
char[] privateKey = ((CharArrayWriter)writer).toCharArray();
System.out.println("Encrypted private key (changes on each run):");
System.out.println(new String(privateKey));
String name = "RSA".equals(key.getAlgorithm()) ? "id_rsa" : "id_dsa";
writer = new OutputStreamWriter(
new FileOutputStream(new File(name)), "UTF-8");
try {
writer.write(privateKey);
} finally {
writer.close();
}
// attempt ganymed connection
Connection connection = null;
try {
System.out.println("Connecting to " + host + ":" + port);
connection = new Connection(host, port);
connection.connect(); // no known_hosts
if (!connection.isAuthMethodAvailable(alias, "publickey")) {
System.out.println("Public key auth is not available.");
return;
}
boolean result = connection.authenticateWithPublicKey(
alias, privateKey, new String(password));
System.out.println(result ? "Authentication success." : "Authentication failure.");
} finally {
if (connection != null) {
connection.close();
}
}
}
private static String genAuthorizedKeysEntry(
KeyStore keystore, String alias) throws GeneralSecurityException, IOException {
Certificate[] chain = keystore.getCertificateChain(alias);
if (chain == null || chain.length <= 0) {
return null;
}
PublicKey publicKey = chain[0].getPublicKey();
if ("RSA".equals(publicKey.getAlgorithm())) {
RSAPublicKey rsaPublicKey = (RSAPublicKey) publicKey;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
String type = "ssh-rsa";
dos.writeInt(type.getBytes("UTF-8").length);
dos.write(type.getBytes("UTF-8"));
byte[] exponent = rsaPublicKey.getPublicExponent().toByteArray();
dos.writeInt(exponent.length);
dos.write(exponent);
byte[] modulus = rsaPublicKey.getModulus().toByteArray();
dos.writeInt(modulus.length);
dos.write(modulus);
String encoded = DatatypeConverter.printBase64Binary(
baos.toByteArray());
return type + " " + encoded + " " + alias;
} else if ("DSA".equals(publicKey.getAlgorithm())) {
DSAPublicKey dsaPublicKey = (DSAPublicKey) publicKey;
DSAParams params = dsaPublicKey.getParams();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
String type = "ssh-dss";
dos.writeInt(type.getBytes("UTF-8").length);
dos.write(type.getBytes("UTF-8"));
byte[] p = params.getP().toByteArray();
dos.writeInt(p.length);
dos.write(p);
byte[] q = params.getQ().toByteArray();
dos.writeInt(q.length);
dos.write(q);
byte[] g = params.getG().toByteArray();
dos.writeInt(g.length);
dos.write(g);
byte[] y = dsaPublicKey.getY().toByteArray();
dos.writeInt(y.length);
dos.write(y);
String encoded = DatatypeConverter.printBase64Binary(
baos.toByteArray());
return type + " " + encoded + " " + alias;
} else {
return null;
}
}
}
輸出示例：
Public key for pasting into OpenSSH authorized_keys file (always same):
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCJLXgRaVdbZNuCsTgUsw2UPGdEA4La8ggQZWkevgAEMrgF+YYT2uN6BYDgD7hzs3ZTLXz2KUQLkMe7xLvimAsg6YXUi46IGEkTSOBFR0yYj+12O2BNbAxOXLIDIMBK5bsDwnuOsFedbeILFU4DaV+igJKO1zHWNbmbmd4RlfrIgH7Blfce8zSVkEdLkqEmydbg4xmj6r+MlzA5HSNZJILivb1XYNnoLjRH1SwUC8Rj6bjgBdNEXLOH0FNpCatHk9R00GaSZjcDZRKNAKnBSEIpw01TKaJlyQUTGqYGjK7UIbbafwMuYKR1rIzkyh4Usxvd3FvMdmKQSUeCnZU296YF myalias
Encrypted private key (changes on each run):
-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,86DF7B50D4E319F6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-----END RSA PRIVATE KEY-----
Connecting to 10.0.3.138:22
Authentication failure.
Edit01
我已經jsch試過這種和sshj，並且它們都無法連接。上面的私鑰提取代碼必須有錯誤。讓我感到困惑的是，我可以與ssh -i聯繫。另外，如果我將上面的私鑰加載到putty-gen中，我會得到與我的程序輸出中相同的authorized_keys字符串（已經存在於我的遠程計算機的.ssh/authorized_keys中）。但是，如果我將它保存爲ppk文件，然後嘗試與它建立膩子會話，則它也不會經過（服務器拒絕我們的密鑰）。