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2 package com.trilead.ssh2;
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3
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4 /**
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5 * A callback interface used to implement a client specific method of checking
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6 * server host keys.
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7 *
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8 * @author Christian Plattner, plattner@trilead.com
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9 * @version $Id: ServerHostKeyVerifier.java,v 1.1 2007/10/15 12:49:56 cplattne Exp $
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10 */
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11
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12 public interface ServerHostKeyVerifier {
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13 /**
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14 * The actual verifier method, it will be called by the key exchange code
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15 * on EVERY key exchange - this can happen several times during the lifetime
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16 * of a connection.
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17 * <p>
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18 * Note: SSH-2 servers are allowed to change their hostkey at ANY time.
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19 *
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20 * @param hostname the hostname used to create the {@link Connection} object
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21 * @param port the remote TCP port
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22 * @param serverHostKeyAlgorithm the public key algorithm (<code>ssh-rsa</code> or <code>ssh-dss</code>)
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23 * @param serverHostKey the server's public key blob
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24 * @return if the client wants to accept the server's host key - if not, the
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25 * connection will be closed.
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26 * @throws Exception Will be wrapped with an IOException, extended version of returning false =)
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27 */
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28 public boolean verifyServerHostKey(String hostname, int port, String serverHostKeyAlgorithm, byte[] serverHostKey)
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29 throws Exception;
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30 }
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